Merge pull request #3923 from ostcar/new-master

Merge OpenSlides-3 branch into the master branch

.gitignore

@@ -6,7 +6,7 @@
 *~
 
 # Virtual Environment
-.virtualenv/*
+.virtualenv*/*
 .venv/*
 
 # Javascript tools and libraries
@@ -30,6 +30,7 @@ debug/*
 # Unit test and coverage reports
 .coverage
 tests/file/*
+.pytest_cache
 
 # Plugin development
 openslides_*
@@ -37,5 +38,43 @@ openslides_*
 # Mypy cache for typechecking
 .mypy_cache
 
-# Development of a new client. Easier to switch branches with this entry
+# OpenSlides 3 Client
-client/*
+
+# compiled output
+client/dist
+client/tmp
+client/out-tsc
+client/documentation
+
+# dependencies
+client/node_modules
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+
+# misc
+Compodoc
+Compodocmodules
+client/.sass-cache
+client/connect.lock
+client/coverage
+client/libpeerconnection.log
+client/npm-debug.log
+client/yarn-error.log
+client/testem.log
+client/typings
+client/yarn.lock
+package-lock.json
+
+# System Files
+client/.DS_Store
+client/Thumbs.db

.travis.yml

@@ -1,36 +1,66 @@
-language: python
 dist: xenial
 sudo: true
+
+matrix:
+  include:
+    - language: python
       cache:
         pip: true
-  yarn: true
       python:
-  - "3.5"
         - "3.6"
-  - "3.7"
-env:
-  - TRAVIS_NODE_VERSION="10.5"
-before_install:
-  - nvm install $TRAVIS_NODE_VERSION
-  - curl -o- -L https://yarnpkg.com/install.sh | bash
-  - export PATH="$HOME/.yarn/bin:$PATH"
       install:
+        - python --version
         - pip install --upgrade setuptools pip
-  - pip install --upgrade --requirement requirements.txt
+        - pip install --upgrade --requirement requirements/development.txt
+        - pip install --upgrade .[big_mode]
         - pip freeze
-  - yarn
-  - node_modules/.bin/gulp --production
       script:
         - flake8 openslides tests
-  - isort --check-only --recursive openslides tests
+        - isort --check-only --diff --recursive openslides tests
         - python -m mypy openslides/
-  - node_modules/.bin/gulp jshint
+        - pytest tests/old/ tests/integration/ tests/unit/ --cov --cov-fail-under=76
-  - node_modules/.bin/karma start --browsers PhantomJS tests/karma/karma.conf.js
 
-  - DJANGO_SETTINGS_MODULE='tests.settings' coverage run ./manage.py test tests.unit
+    - language: python
-  - coverage report --fail-under=35
+      cache:
+        pip: true
+      python:
+        - "3.7"
+      install:
+        - python --version
+        - pip install --upgrade setuptools pip
+        - pip install --upgrade --requirement requirements/development.txt
+        - pip install --upgrade .[big_mode]
+        - pip freeze
+      script:
+        - flake8 openslides tests
+        - isort --check-only --diff --recursive openslides tests
+        - python -m mypy openslides/
+        - pytest tests/old/ tests/integration/ tests/unit/ --cov --cov-fail-under=76
 
-  - DJANGO_SETTINGS_MODULE='tests.settings' coverage run ./manage.py test tests.integration
+    - language: node_js
-  - coverage report --fail-under=73
+      node_js:
-
+        - "9"
-  - DJANGO_SETTINGS_MODULE='tests.settings' ./manage.py test tests.old
+      apt:
+        sources:
+          - google-chrome
+        packages:
+          - google-chrome-stable
+      cache:
+        yarn: true
+        directories:
+          - $HOME/.yarn-cache
+          - node_modules
+      before_install:
+        - sh -e /etc/init.d/xvfb start
+        - export CHROME_BIN=/usr/bin/google-chrome
+        - export DISPLAY=:99.0
+        - curl -o- -L https://yarnpkg.com/install.sh | bash
+        - export PATH="$HOME/.yarn/bin:$PATH"
+        - yarn global add @angular/cli
+        - ng --version
+        - cd client
+      install:
+        - yarn install
+      script:
+        - yarn run lint
+        - yarn run test --watch=false

CHANGELOG.rst

@@ -4,6 +4,28 @@
 
 https://openslides.org/
 
+Version 3.0 (unreleased)
+========================
+
+Core:
+ - Changed personal settings.py, updated to channels2, complete rework of
+   startup and caching system, dropped support for Geiss [#3796, #3789].
+ - Dropped support for Python 3.5 [#3805].
+ - Added a websocket protocol for server client communication using
+   JSON schema [#3807].
+ - Changed URL schema [#3798].
+ - Enabled docs for using OpenSlides with Gunicorn and Uvicorn in big
+   mode [#3799, #3817].
+
+Motions:
+ - Option to customly sort motions [#3894].
+ - Added support for adding a statute [#3894].
+
+User:
+ - Added new admin group which grants all permissions. Users of existing group
+   'Admin' or 'Staff' are move to the new group during migration [#3859].
+
+
 Version 2.3 (2018-09-20)
 ========================
 `Release notes <https://github.com/OpenSlides/OpenSlides/wiki/OpenSlides-2.3>`_ ·

DEVELOPMENT.rst

@@ -15,7 +15,7 @@ Installation and start of the development version
 a. Check requirements
 '''''''''''''''''''''
 
-Make sure that you have installed `Python (>= 3.5) <https://www.python.org/>`_,
+Make sure that you have installed `Python (>= 3.6) <https://www.python.org/>`_,
 `Node.js (>=4.x) <https://nodejs.org/>`_, `Yarn <https://yarnpkg.com/>`_ and
 `Git <http://git-scm.com/>`_ on your system. You also need build-essential
 packages and header files and a static library for Python.
@@ -25,9 +25,6 @@ For Ubuntu 16.04 e. g. follow `Yarn installation instructions
 
     $ sudo apt-get install git nodejs nodejs-legacy npm build-essential python3-dev
 
-*Note: For Ubuntu 14.04 you have to update Node.js before. The distribution
-version is 0.10.25 which is not sufficient.*
-
 
 b. Get OpenSlides source code
 '''''''''''''''''''''''''''''
@@ -78,7 +75,7 @@ To get help on the command line options run::
 
 Later you might want to restart the server with one of the following commands.
 
-To start OpenSlides with Daphne and one worker and to avoid opening new browser
+To start OpenSlides with Daphne and to avoid opening new browser
 windows run::
 
     $ python manage.py start --no-browser
@@ -87,16 +84,10 @@ When debugging something email related change the email backend to console::
 
     $ python manage.py start --debug-email
 
-To start OpenSlides with Daphne and four workers (avoid concurrent write
+To start OpenSlides with Daphne run::
-requests or use PostgreSQL, see below) run::
 
     $ python manage.py runserver
 
-To start OpenSlides with Geiss and one worker and to avoid opening new browser
-windows (download Geiss and setup Redis before, see below) run::
-
-    $ python manage.py start --no-browser --use-geiss
-
 Use gulp watch in a second command-line interface::
 
     $ node_modules/.bin/gulp watch
@@ -108,7 +99,7 @@ Use gulp watch in a second command-line interface::
 Follow the instructions above (Installation on GNU/Linux or Mac OS X) but care
 of the following variations.
 
-To get Python download and run the latest `Python 3.5 32-bit (x86) executable
+To get Python download and run the latest `Python 3.7 32-bit (x86) executable
 installer <https://www.python.org/downloads/windows/>`_. Note that the 32-bit
 installer is required even on a 64-bit Windows system. If you use the 64-bit
 installer, step d. of the instruction might fail unless you installed some
@@ -152,8 +143,7 @@ OpenSlides in big mode
 
 In the so called big mode you should use OpenSlides with Redis, PostgreSQL and a
 webserver like Apache HTTP Server or nginx as proxy server in front of your
-OpenSlides interface server. Optionally you can use `Geiss
+OpenSlides interface server.
-<https://github.com/ostcar/geiss/>`_ as interface server instead of Daphne.
 
 
 1. Install and configure PostgreSQL and Redis
@@ -173,15 +163,8 @@ Then add database user and database. For Ubuntu 16.04 e. g. run::
     $ sudo -u postgres createdb --owner=openslides openslides
 
 
-2. Install additional packages
-------------------------------
 
-Install some more required Python packages::
+2. Change OpenSlides settings
-
-    $ pip install -r requirements_big_mode.txt
-
-
-3. Change OpenSlides settings
 -----------------------------
 
 Create OpenSlides settings file if it does not exist::
@@ -197,34 +180,26 @@ Populate your new database::
     $ python manage.py migrate
 
 
-4. Run OpenSlides
+3. Run OpenSlides
 -----------------
 
-First start e. g. four workers (do not use the `--threads` option, because the threads will not spawn across all cores)::
+To start gunicorn with uvicorn as protocol server run::
-
-    $ python manage.py runworker&
-    $ python manage.py runworker&
-    $ python manage.py runworker&
-    $ python manage.py runworker&
-
-To start Daphne as protocol server run::
 
     $ export DJANGO_SETTINGS_MODULE=settings
     $ export PYTHONPATH=personal_data/var/
-    $ daphne openslides.asgi:channel_layer
+    $ gunicorn -w 4 -k uvicorn.workers.UvicornWorker openslides.asgi:application
 
-To use Geiss instead of Daphne, just download Geiss and start it::
+This example uses 4 instances. The recommendation is to use CPU cores * 2.
 
-    $ python manage.py getgeiss
-    $ ./personal_data/var/geiss
 
-5. Use Nginx (optional)
+4. Use Nginx (optional)
+-----------------------
 
 When using Nginx as a proxy for delivering staticfiles the performance of the setup will increase very much. For delivering staticfiles you have to collect those::
 
     $ python manage.py collectstatic
 
-This is an example configuration for a single Daphne/Geiss listen on port 8000::
+This is an example configuration for a single Daphne listen on port 8000::
 
     server {
          listen 80;
@@ -232,9 +207,6 @@ This is an example configuration for a single Daphne/Geiss listen on port 8000::
 
          server_name _;
 
-         location ~* ^/(?!ws|wss|webclient|core/servertime|core/version|users/whoami|users/login|users/logout|users/setpassword|motions/docxtemplate|agenda/docxtemplate|projector|real-projector|static|media|rest).*$ {
-             rewrite ^.*$ /static/templates/index.html;
-         }
          location ~* ^/projector.*$ {
              rewrite ^.*$ /static/templates/projector-container.html;
          }
@@ -247,6 +219,9 @@ This is an example configuration for a single Daphne/Geiss listen on port 8000::
          location /static {
              alias <your path to>/collected-static;
          }
+         location ~* ^/(?!ws|wss|media|rest|views).*$ {
+             rewrite ^.*$ /static/templates/index.html;
+         }
 
          location / {
              proxy_pass http://localhost:8000;
@@ -258,10 +233,3 @@ This is an example configuration for a single Daphne/Geiss listen on port 8000::
              proxy_set_header X-Scheme $scheme;
          }
      }
-
-Using Nginx as a load balancer is fairly easy. Just start multiple Daphnes/Geiss on different ports, change the `proxy_pass` to `http://openslides/` and add this on top of the Nginx configuration::
-
-    upstream openslides {
-        server localhost:2001;
-        server localhost:2002;
-    }

Dockerfile

@@ -1,6 +1,7 @@
-FROM python:3.5
+FROM python:3.7-slim
-RUN apt-get -y update && apt-get -y upgrade
+RUN apt-get -y update && \
-RUN apt-get install -y libpq-dev supervisor curl vim
+  apt-get -y upgrade && \
+  apt-get install -y libpq-dev supervisor curl wget xz-utils bzip2 git gcc
 RUN useradd -m openslides
 
 ## BUILD JS STUFF
@@ -18,7 +19,7 @@ RUN node_modules/.bin/gulp --production
 
 # INSTALL PYTHON DEPENDENCIES
 USER root
-RUN pip install -r /app/requirements_big_mode.txt
+RUN pip install .[big_mode]
 
 ## Clean up
 RUN apt-get remove -y python3-pip wget curl

MANIFEST.in

@@ -2,8 +2,8 @@ include AUTHORS
 include CHANGELOG
 include LICENSE
 include README.rst
-include requirements_production.txt
+include requirements/production.txt
-include requirements_big_mode.txt
+include requirements/big_mode.txt
 include bower.json
 recursive-include openslides *.*
 exclude openslides/__pycache__/*

README.rst

@@ -26,7 +26,7 @@ Installation
 a. Check requirements
 '''''''''''''''''''''
 
-Make sure that you have installed `Python (>= 3.5) <https://www.python.org/>`_
+Make sure that you have installed `Python (>= 3.6) <https://www.python.org/>`_
 on your system.
 
 Additional you need build-essential packages, header files and a static
@@ -72,7 +72,7 @@ compressed tar archive and run::
     $ pip install openslides-x.y.tar.gz
 
 This will install all required Python packages (see
-``requirements_production.txt``).
+``requirements/production.txt``).
 
 
 d. Start OpenSlides
@@ -139,23 +139,21 @@ file (usually called settings.py).
 
 The configuration values that have to be altered are:
 
-* CACHES
 * CHANNEL_LAYERS
 * DATABASES
 * SESSION_ENGINE
+* REDIS_ADDRESS
 
 You should use a webserver like Apache HTTP Server or nginx to serve the
 static and media files as proxy server in front of your OpenSlides
 interface server. You also should use a database like PostgreSQL and Redis
 as channels backend, cache backend and session engine. Finally you should
-start some WSGI workers and one or more interface servers (Daphne or Geiss).
+use gunicorn with uvicorn as interface server.
 
 Please see the respective section in the `DEVELOPMENT.rst
 <https://github.com/OpenSlides/OpenSlides/blob/master/DEVELOPMENT.rst>`_ and:
 
 * https://channels.readthedocs.io/en/latest/deploying.html
-* https://github.com/ostcar/geiss
-* https://docs.djangoproject.com/en/1.10/topics/cache/
 * https://github.com/sebleier/django-redis-cache
 * https://docs.djangoproject.com/en/1.10/ref/settings/#databases
 
@@ -165,7 +163,7 @@ Used software
 
 OpenSlides uses the following projects or parts of them:
 
-* Several Python packages (see ``requirements_production.txt``).
+* Several Python packages (see ``requirements/production.txt`` and ``requirements/big_mode.txt``).
 
 * Several JavaScript packages (see ``bower.json``)
 

client/.editorconfig

@@ -0,0 +1,13 @@
+# Editor configuration, see http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

client/.prettierrc

@@ -0,0 +1,8 @@
+{
+    "printWidth": 120,
+    "singleQuote": true,
+    "useTabs": false,
+    "tabWidth": 4,
+    "semi": true,
+    "bracketSpacing": true
+}

client/README.md

@@ -0,0 +1,56 @@
+# OpenSlides 3 Client
+
+Prototype application for OpenSlides 3.0 (Client).
+Currently under constant heavy maintenance.
+
+## Development Info
+
+As an Angular project, Angular CLI is highly recommended to create components and services.
+See https://angular.io/guide/quickstart for details.
+
+### Contribution Info
+
+Please respect the code-style defined in `.editorconf` and `.pretierrc`.
+
+Code alignment should be automatically corrected by the pre-commit hooks.
+Adjust your editor to the `.editorconfig` to avoid surprises.
+See https://editorconfig.org/ for details.
+
+### Pre-Commit Hooks
+
+Before commiting, new code will automatically be aligned to the definitions set in the
+`.prettierrc`.
+Furthermore, new code has to pass linting.
+
+Our pre-commit hooks are:
+`pretty-quick --staged` and `lint`
+See `package.json` for details.
+
+### Documentation Info
+
+The documentation can be generated by running `npm run compodoc`.
+A new web server will be started on http://localhost:8080
+Once running, the documentation will be updated automatically.
+
+You can run it on another port, with adding your local port after the
+command. If no port specified, it will try to use 8080.
+
+Please document new code using JSDoc tags.
+See https://compodoc.app/guides/jsdoc-tags.html for details.
+
+### Development server
+
+Run `npm start` for a development server. Navigate to `http://localhost:4200/`.
+The app will automatically reload if you change any of the source files.
+
+A running OpenSlides (2.2 or higher) instance is expected on port 8000.
+
+Start OpenSlides as usual using
+`python manage.py start --no-browser --host 0.0.0.0`
+
+### Translation
+
+We are using ngx-translate for translation purposes.
+Use `npm run extract` to extract strings and update elements an with translation functions.
+
+Language files can be found in `/src/assets/i18n`.

client/angular.json

@@ -0,0 +1,115 @@
+{
+    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+    "version": 1,
+    "newProjectRoot": "projects",
+    "projects": {
+        "client": {
+            "root": "",
+            "sourceRoot": "src",
+            "projectType": "application",
+            "prefix": "os",
+            "schematics": {
+                "@schematics/angular:component": {
+                    "styleext": "scss"
+                }
+            },
+            "architect": {
+                "build": {
+                    "builder": "@angular-devkit/build-angular:browser",
+                    "options": {
+                        "outputPath": "dist/client",
+                        "index": "src/index.html",
+                        "main": "src/main.ts",
+                        "polyfills": "src/polyfills.ts",
+                        "tsConfig": "src/tsconfig.app.json",
+                        "assets": ["src/favicon.ico", "src/assets"],
+                        "styles": ["src/styles.scss", "node_modules/material-design-icons/iconfont/material-icons.css"],
+                        "scripts": []
+                    },
+                    "configurations": {
+                        "production": {
+                            "fileReplacements": [
+                                {
+                                    "replace": "src/environments/environment.ts",
+                                    "with": "src/environments/environment.prod.ts"
+                                }
+                            ],
+                            "optimization": true,
+                            "outputHashing": "all",
+                            "sourceMap": false,
+                            "extractCss": true,
+                            "namedChunks": false,
+                            "aot": true,
+                            "extractLicenses": true,
+                            "vendorChunk": false,
+                            "buildOptimizer": true
+                        }
+                    }
+                },
+                "serve": {
+                    "builder": "@angular-devkit/build-angular:dev-server",
+                    "options": {
+                        "browserTarget": "client:build"
+                    },
+                    "configurations": {
+                        "production": {
+                            "browserTarget": "client:build:production"
+                        }
+                    }
+                },
+                "extract-i18n": {
+                    "builder": "@angular-devkit/build-angular:extract-i18n",
+                    "options": {
+                        "browserTarget": "client:build"
+                    }
+                },
+                "test": {
+                    "builder": "@angular-devkit/build-angular:karma",
+                    "options": {
+                        "main": "src/test.ts",
+                        "polyfills": "src/polyfills.ts",
+                        "tsConfig": "src/tsconfig.spec.json",
+                        "karmaConfig": "src/karma.conf.js",
+                        "styles": ["src/styles.css"],
+                        "scripts": [],
+                        "assets": ["src/favicon.ico", "src/assets"]
+                    }
+                },
+                "lint": {
+                    "builder": "@angular-devkit/build-angular:tslint",
+                    "options": {
+                        "tsConfig": "src/tsconfig.spec.json",
+                        "format": "stylish",
+                        "exclude": ["**/node_modules/**"]
+                    }
+                }
+            }
+        },
+        "client-e2e": {
+            "root": "e2e/",
+            "projectType": "application",
+            "architect": {
+                "e2e": {
+                    "builder": "@angular-devkit/build-angular:protractor",
+                    "options": {
+                        "protractorConfig": "e2e/protractor.conf.js",
+                        "devServerTarget": "client:serve"
+                    },
+                    "configurations": {
+                        "production": {
+                            "devServerTarget": "client:serve:production"
+                        }
+                    }
+                },
+                "lint": {
+                    "builder": "@angular-devkit/build-angular:tslint",
+                    "options": {
+                        "tsConfig": "e2e/tsconfig.e2e.json",
+                        "exclude": ["**/node_modules/**"]
+                    }
+                }
+            }
+        }
+    },
+    "defaultProject": "client"
+}

client/e2e/protractor.conf.js

@@ -0,0 +1,26 @@
+// Protractor configuration file, see link for more information
+// https://github.com/angular/protractor/blob/master/lib/config.ts
+
+const { SpecReporter } = require('jasmine-spec-reporter');
+
+exports.config = {
+    allScriptsTimeout: 11000,
+    specs: ['./src/**/*.e2e-spec.ts'],
+    capabilities: {
+        browserName: 'chrome'
+    },
+    directConnect: true,
+    baseUrl: 'http://localhost:4200/',
+    framework: 'jasmine',
+    jasmineNodeOpts: {
+        showColors: true,
+        defaultTimeoutInterval: 30000,
+        print: function() {}
+    },
+    onPrepare() {
+        require('ts-node').register({
+            project: require('path').join(__dirname, './tsconfig.e2e.json')
+        });
+        jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
+    }
+};

client/e2e/src/app.e2e-spec.ts

@@ -0,0 +1,14 @@
+import { AppPage } from './app.po';
+
+describe('workspace-project App', () => {
+  let page: AppPage;
+
+  beforeEach(() => {
+    page = new AppPage();
+  });
+
+  it('should display welcome message', () => {
+    page.navigateTo();
+    expect(page.getParagraphText()).toEqual('Welcome to client!');
+  });
+});

client/e2e/src/app.po.ts

@@ -0,0 +1,11 @@
+import { browser, by, element } from 'protractor';
+
+export class AppPage {
+    navigateTo() {
+        return browser.get('/');
+    }
+
+    getParagraphText() {
+        return element(by.css('os-root h1')).getText();
+    }
+}

client/e2e/tsconfig.e2e.json

@@ -0,0 +1,9 @@
+{
+    "extends": "../tsconfig.json",
+    "compilerOptions": {
+        "outDir": "../out-tsc/app",
+        "module": "commonjs",
+        "target": "es5",
+        "types": ["jasmine", "jasminewd2", "node"]
+    }
+}

client/package.json

@@ -0,0 +1,68 @@
+{
+    "name": "OpenSlides3-Client",
+    "version": "0.0.0",
+    "scripts": {
+        "ng": "ng",
+        "start": "ng serve --proxy-config proxy.conf.json --host=0.0.0.0 --aot",
+        "build": "ng build",
+        "test": "ng test",
+        "lint": "ng lint",
+        "e2e": "ng e2e",
+        "compodoc": "./node_modules/.bin/compodoc --hideGenerator -p src/tsconfig.app.json -n 'OpenSlides Documentation' -d ../Compodoc -s -w -t -o --port",
+        "extract": "ngx-translate-extract -i ./src -o ./src/assets/i18n/{en,de,fr}.json --clean --sort --format-indentation '    ' --format namespaced-json",
+        "format:fix": "pretty-quick --staged",
+        "precommit": "run-s format:fix lint"
+    },
+    "private": true,
+    "dependencies": {
+        "@angular/animations": "^7.0.0-rc.0",
+        "@angular/cdk": "^7.0.0-beta.2",
+        "@angular/common": "^7.0.0-rc.0",
+        "@angular/compiler": "^7.0.0-rc.0",
+        "@angular/core": "^7.0.0-rc.0",
+        "@angular/forms": "^7.0.0-rc.0",
+        "@angular/http": "^7.0.0-rc.0",
+        "@angular/material": "^7.0.0-beta.2",
+        "@angular/platform-browser": "^7.0.0-rc.0",
+        "@angular/platform-browser-dynamic": "^7.0.0-rc.0",
+        "@angular/router": "^7.0.0-rc.0",
+        "@ngx-pwa/local-storage": "^6.1.1",
+        "@ngx-translate/core": "^10.0.2",
+        "@ngx-translate/http-loader": "^3.0.1",
+        "core-js": "^2.5.4",
+        "material-design-icons": "^3.0.1",
+        "ngx-mat-select-search": "^1.4.0",
+        "roboto-fontface": "^0.10.0",
+        "rxjs": "^6.3.3",
+        "uuid": "^3.3.2",
+        "zone.js": "^0.8.26"
+    },
+    "devDependencies": {
+        "@angular-devkit/build-angular": "^0.7.0",
+        "@angular/cli": "^7.0.0-beta.4",
+        "@angular/compiler-cli": "^7.0.0-rc.0",
+        "@angular/language-service": "^7.0.0-rc.0",
+        "@biesbjerg/ngx-translate-extract": "^2.3.4",
+        "@compodoc/compodoc": "^1.1.5",
+        "@types/jasmine": "~2.8.6",
+        "@types/jasminewd2": "^2.0.4",
+        "@types/node": "~8.9.4",
+        "codelyzer": "~4.2.1",
+        "husky": "^0.14.3",
+        "jasmine-core": "~2.99.1",
+        "jasmine-spec-reporter": "~4.2.1",
+        "karma": "^3.0.0",
+        "karma-chrome-launcher": "~2.2.0",
+        "karma-coverage-istanbul-reporter": "^2.0.4",
+        "karma-jasmine": "~1.1.1",
+        "karma-jasmine-html-reporter": "^0.2.2",
+        "npm-run-all": "^4.1.3",
+        "prettier": "^1.14.3",
+        "pretty-quick": "^1.7.0",
+        "protractor": "^5.4.1",
+        "ts-node": "~5.0.1",
+        "tslint": "~5.9.1",
+        "tsutils": "^3.0.0",
+        "typescript": "^3.1.1"
+    }
+}

client/proxy.conf.json

@@ -0,0 +1,19 @@
+{
+    "/apps/": {
+        "target": "http://localhost:8000",
+        "secure": false
+    },
+    "/media/": {
+        "target": "http://localhost:8000",
+        "secure": false
+    },
+    "/rest/": {
+        "target": "http://localhost:8000",
+        "secure": false
+    },
+    "/ws/site/": {
+        "target": "ws://localhost:8000",
+        "secure": false,
+        "ws": true
+    }
+}

client/src/app/app-routing.module.spec.ts

@@ -0,0 +1,13 @@
+import { AppRoutingModule } from './app-routing.module';
+
+describe('AppRoutingModule', () => {
+    let appRoutingModule: AppRoutingModule;
+
+    beforeEach(() => {
+        appRoutingModule = new AppRoutingModule();
+    });
+
+    it('should create an instance', () => {
+        expect(appRoutingModule).toBeTruthy();
+    });
+});

client/src/app/app-routing.module.ts

@@ -0,0 +1,32 @@
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { LoginComponent } from './site/login/components/login-wrapper/login.component';
+import { LoginMaskComponent } from './site/login/components/login-mask/login-mask.component';
+import { LoginLegalNoticeComponent } from './site/login/components/login-legal-notice/login-legal-notice.component';
+import { LoginPrivacyPolicyComponent } from './site/login/components/login-privacy-policy/login-privacy-policy.component';
+
+/**
+ * Global app routing
+ */
+const routes: Routes = [
+    {
+        path: 'login',
+        component: LoginComponent,
+        children: [
+            { path: '', component: LoginMaskComponent },
+            { path: 'legalnotice', component: LoginLegalNoticeComponent },
+            { path: 'privacypolicy', component: LoginPrivacyPolicyComponent }
+        ]
+    },
+
+    { path: 'projector', loadChildren: './projector-container/projector-container.module#ProjectorContainerModule' },
+    { path: '', loadChildren: './site/site.module#SiteModule' },
+    { path: '**', redirectTo: '' }
+];
+
+@NgModule({
+    imports: [RouterModule.forRoot(routes)],
+    exports: [RouterModule]
+})
+export class AppRoutingModule {}

client/src/app/app.component.html

@@ -0,0 +1,3 @@
+<div class="content">
+    <router-outlet></router-outlet>
+</div>

client/src/app/app.component.scss

@@ -0,0 +1,3 @@
+.content {
+    flex: 1;
+}

client/src/app/app.component.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, async } from '@angular/core/testing';
+import { AppComponent } from './app.component';
+import { E2EImportsModule } from './../e2e-imports.module';
+describe('AppComponent', () => {
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+    it('should create the app', async(() => {
+        const fixture = TestBed.createComponent(AppComponent);
+        const app = fixture.debugElement.componentInstance;
+        expect(app).toBeTruthy();
+    }));
+});

client/src/app/app.component.ts

@@ -0,0 +1,75 @@
+import { Component } from '@angular/core';
+import { TranslateService } from '@ngx-translate/core';
+import { OperatorService } from './core/services/operator.service';
+import { LoginDataService } from './core/services/login-data.service';
+import { ConfigService } from './core/services/config.service';
+import { ConstantsService } from './core/services/constants.service';
+
+/**
+ * Angular's global App Component
+ */
+@Component({
+    selector: 'os-root',
+    templateUrl: './app.component.html',
+    styleUrls: ['./app.component.scss']
+})
+export class AppComponent {
+    /**
+     * Master-component of all apps.
+     *
+     * Inits the translation service, the operator, the login data and the constants.
+     *
+     * Handles the altering of Array.toString()
+     *
+     * @param autoupdateService
+     * @param notifyService
+     * @param translate
+     */
+    public constructor(
+        translate: TranslateService,
+        operator: OperatorService,
+        configService: ConfigService,
+        loginDataService: LoginDataService,
+        constantsService: ConstantsService // Needs to be started, so it can register itself to the WebsocketService
+    ) {
+        // manually add the supported languages
+        translate.addLangs(['en', 'de', 'fr']);
+        // this language will be used as a fallback when a translation isn't found in the current language
+        translate.setDefaultLang('en');
+        // get the browsers default language
+        const browserLang = translate.getBrowserLang();
+        // try to use the browser language if it is available. If not, uses english.
+        translate.use(translate.getLangs().includes(browserLang) ? browserLang : 'en');
+        // change default JS functions
+        this.overloadArrayToString();
+    }
+
+    /**
+     * Function to alter the normal Array.toString - function
+     *
+     * Will add a whitespace after a comma and shorten the output to
+     * three strings.
+     *
+     * TODO: There might be a better place for overloading functions than app.component
+     * TODO: Overloading can be extended to more functions.
+     */
+    private overloadArrayToString(): void {
+        Array.prototype.toString = function(): string {
+            let string = '';
+            const iterations = Math.min(this.length, 3);
+
+            for (let i = 0; i <= iterations; i++) {
+                if (i < iterations) {
+                    string += this[i];
+                }
+
+                if (i < iterations - 1) {
+                    string += ', ';
+                } else if (i === iterations && this.length > iterations) {
+                    string += ', ...';
+                }
+            }
+            return string;
+        };
+    }
+}

client/src/app/app.module.ts

@@ -0,0 +1,61 @@
+// angular modules
+import { BrowserModule } from '@angular/platform-browser';
+import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
+import { NgModule, APP_INITIALIZER } from '@angular/core';
+import { HttpClientModule, HttpClient, HttpClientXsrfModule } from '@angular/common/http';
+
+// Elementary App Components
+import { AppRoutingModule } from './app-routing.module';
+import { AppComponent } from './app.component';
+import { CoreModule } from './core/core.module';
+
+// translation module.
+import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
+import { PruningTranslationLoader } from './core/pruning-loader';
+import { LoginModule } from './site/login/login.module';
+import { AppLoadService } from './core/services/app-load.service';
+
+/**
+ * For the translation module. Loads a Custom 'translation loader' and provides it as loader.
+ * @param http Just the HttpClient to load stuff
+ */
+export function HttpLoaderFactory(http: HttpClient): PruningTranslationLoader {
+    return new PruningTranslationLoader(http);
+}
+
+/**
+ * Returns a function that returns a promis that will be resolved, if all apps are loaded.
+ * @param appLoadService The service that loads the apps.
+ */
+export function AppLoaderFactory(appLoadService: AppLoadService): () => Promise<void> {
+    return () => appLoadService.loadApps();
+}
+
+/**
+ * Global App Module. Keep it as clean as possible.
+ */
+@NgModule({
+    declarations: [AppComponent],
+    imports: [
+        BrowserModule,
+        HttpClientModule,
+        HttpClientXsrfModule.withOptions({
+            cookieName: 'OpenSlidesCsrfToken',
+            headerName: 'X-CSRFToken'
+        }),
+        BrowserAnimationsModule,
+        TranslateModule.forRoot({
+            loader: {
+                provide: TranslateLoader,
+                useFactory: HttpLoaderFactory,
+                deps: [HttpClient]
+            }
+        }),
+        AppRoutingModule,
+        CoreModule,
+        LoginModule
+    ],
+    providers: [{ provide: APP_INITIALIZER, useFactory: AppLoaderFactory, deps: [AppLoadService], multi: true }],
+    bootstrap: [AppComponent]
+})
+export class AppModule {}

client/src/app/base.component.ts

@@ -0,0 +1,36 @@
+import { Title } from '@angular/platform-browser';
+import { OpenSlidesComponent } from './openslides.component';
+import { TranslateService } from '@ngx-translate/core';
+
+/**
+ * Provides functionalities that will be used by most components
+ * currently able to set the title with the suffix ' - OpenSlides 3'
+ *
+ * A BaseComponent is an OpenSlides Component.
+ * Components in the 'Side'- or 'projector' Folder are BaseComponents
+ */
+export abstract class BaseComponent extends OpenSlidesComponent {
+    /**
+     * To manipulate the browser title bar, adds the Suffix "OpenSlides 3"
+     *
+     * Might be a config variable later at some point
+     */
+    private titleSuffix = ' - OpenSlides 3';
+
+    /**
+     * Child constructor that implements the titleServices and calls Super from OpenSlidesComponent
+     */
+    public constructor(protected titleService?: Title, protected translate?: TranslateService) {
+        super();
+    }
+
+    /**
+     * Set the title in web browser using angulars TitleService
+     * @param prefix The title prefix. Should be translated here.
+     * TODO Might translate the prefix here?
+     */
+    public setTitle(prefix: string): void {
+        const translatedPrefix = this.translate.instant(prefix);
+        this.titleService.setTitle(translatedPrefix + this.titleSuffix);
+    }
+}

client/src/app/core/core.module.spec.ts

@@ -0,0 +1,13 @@
+import { CoreModule } from './core.module';
+
+describe('CoreModule', () => {
+    let coreModule: CoreModule;
+
+    beforeEach(() => {
+        coreModule = new CoreModule(null);
+    });
+
+    it('should create an instance', () => {
+        expect(coreModule).toBeTruthy();
+    });
+});

client/src/app/core/core.module.ts

@@ -0,0 +1,52 @@
+import { NgModule, Optional, SkipSelf } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { Title } from '@angular/platform-browser';
+import { HTTP_INTERCEPTORS } from '@angular/common/http';
+
+// Core Services, Directives
+import { AuthGuard } from './services/auth-guard.service';
+import { AuthService } from './services/auth.service';
+import { AutoupdateService } from './services/autoupdate.service';
+import { DataStoreService } from './services/data-store.service';
+import { OperatorService } from './services/operator.service';
+import { WebsocketService } from './services/websocket.service';
+import { AddHeaderInterceptor } from './http-interceptor';
+import { DataSendService } from './services/data-send.service';
+import { ViewportService } from './services/viewport.service';
+import { PromptDialogComponent } from '../shared/components/prompt-dialog/prompt-dialog.component';
+
+/** Global Core Module. Contains all global (singleton) services
+ *
+ */
+@NgModule({
+    imports: [CommonModule],
+    providers: [
+        Title,
+        AuthGuard,
+        AuthService,
+        AutoupdateService,
+        DataStoreService,
+        DataSendService,
+        OperatorService,
+        ViewportService,
+        WebsocketService,
+        {
+            provide: HTTP_INTERCEPTORS,
+            useClass: AddHeaderInterceptor,
+            multi: true
+        }
+    ],
+    entryComponents: [PromptDialogComponent]
+})
+export class CoreModule {
+    /** make sure CoreModule is imported only by one NgModule, the AppModule */
+    public constructor(
+        @Optional()
+        @SkipSelf()
+        parentModule: CoreModule
+    ) {
+        if (parentModule) {
+            throw new Error('CoreModule is already loaded. Import only in AppModule');
+        }
+    }
+}

client/src/app/core/http-interceptor.ts

@@ -0,0 +1,24 @@
+import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest } from '@angular/common/http';
+import { Observable } from 'rxjs';
+
+/**
+ * Interceptor class for HTTP requests. Replaces all 'httpOptions' in all http.get or http.post requests.
+ *
+ * Should not need further adjustment.
+ */
+export class AddHeaderInterceptor implements HttpInterceptor {
+    /**
+     * Normal HttpInterceptor usage
+     *
+     * @param req Will clone the request and intercept it with our desired headers
+     * @param next HttpHandler will catch the response and forwards it to the original instance
+     */
+    public intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
+        const clonedRequest = req.clone({
+            withCredentials: true,
+            headers: req.headers.set('Content-Type', 'application/json')
+        });
+
+        return next.handle(clonedRequest);
+    }
+}

client/src/app/core/pruning-loader.ts

@@ -0,0 +1,55 @@
+import { TranslateLoader } from '@ngx-translate/core';
+import { HttpClient } from '@angular/common/http';
+import { map } from 'rxjs/operators/';
+
+/**
+ * Translation loader that replaces empty strings with nothing.
+ *
+ * ngx-translate-extract writes empty strings into json files.
+ * The problem is that these empty strings don't trigger
+ * the MissingTranslationHandler - they are simply empty strings...
+ *
+ */
+export class PruningTranslationLoader implements TranslateLoader {
+    /**
+     * Constructor to load the HttpClient
+     *
+     * @param http httpClient to load the translation files.
+     * @param prefix Path to the language files. Can be adjusted of needed
+     * @param suffix Suffix of the translation files. Usually '.json'.
+     */
+    public constructor(
+        private http: HttpClient,
+        private prefix: string = '/assets/i18n/',
+        private suffix: string = '.json'
+    ) {}
+
+    /**
+     * Loads a language file, stores the content, give it to the process function.
+     * @param lang language string (en, fr, de, ...)
+     */
+    public getTranslation(lang: string): any {
+        return this.http.get(`${this.prefix}${lang}${this.suffix}`).pipe(map((res: Object) => this.process(res)));
+    }
+
+    /**
+     * Prevent to display empty strings as a translation.
+     * Falls back to the default language or simply copy the content of the key.
+     * @param any the content of any language file.
+     */
+    private process(object: any): any {
+        const newObject = {};
+        for (const key in object) {
+            if (object.hasOwnProperty(key)) {
+                if (typeof object[key] === 'object') {
+                    newObject[key] = this.process(object[key]);
+                } else if (typeof object[key] === 'string' && object[key] === '') {
+                    // do not copy empty strings
+                } else {
+                    newObject[key] = object[key];
+                }
+            }
+        }
+        return newObject;
+    }
+}

client/src/app/core/services/app-load.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+import { AppLoadService } from './app-load.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('AppLoadService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [AppLoadService]
+        });
+    });
+    it('should be created', inject([AppLoadService], (service: AppLoadService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/app-load.service.ts

@@ -0,0 +1,59 @@
+import { Injectable } from '@angular/core';
+import { plugins } from '../../../plugins';
+import { CommonAppConfig } from '../../site/common/common.config';
+import { ModelConstructor, BaseModel } from '../../shared/models/base/base-model';
+import { AppConfig } from '../../site/base/app-config';
+import { CollectionStringModelMapperService } from './collectionStringModelMapper.service';
+import { MediafileAppConfig } from '../../site/mediafiles/mediafile.config';
+import { MotionsAppConfig } from '../../site/motions/motions.config';
+import { ConfigAppConfig } from '../../site/config/config.config';
+import { AgendaAppConfig } from '../../site/agenda/agenda.config';
+import { AssignmentsAppConfig } from '../../site/assignments/assignments.config';
+import { UsersAppConfig } from '../../site/users/users.config';
+import { MainMenuService } from './main-menu.service';
+
+/**
+ * A list of all app configurations of all delivered apps.
+ */
+const appConfigs: AppConfig[] = [
+    CommonAppConfig,
+    ConfigAppConfig,
+    AgendaAppConfig,
+    AssignmentsAppConfig,
+    MotionsAppConfig,
+    MediafileAppConfig,
+    UsersAppConfig
+];
+
+/**
+ * Handles all incoming and outgoing notify messages via {@link WebsocketService}.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class AppLoadService {
+    public constructor(
+        private modelMapper: CollectionStringModelMapperService,
+        private mainMenuService: MainMenuService
+    ) {}
+
+    public async loadApps(): Promise<void> {
+        if (plugins.length) {
+            console.log('plugins: ', plugins);
+        }
+        /*for (const pluginName of plugins) {
+            const plugin = await import('../../../../../plugins/' + pluginName + '/' + pluginName);
+            plugin.main();
+        }*/
+        appConfigs.forEach((config: AppConfig) => {
+            if (config.models) {
+                config.models.forEach(entry => {
+                    this.modelMapper.registerCollectionElement(entry.collectionString, entry.model);
+                });
+            }
+            if (config.mainMenuEntries) {
+                this.mainMenuService.registerEntries(config.mainMenuEntries);
+            }
+        });
+    }
+}

client/src/app/core/services/auth-guard.service.ts

@@ -0,0 +1,48 @@
+import { Injectable } from '@angular/core';
+import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, CanActivateChild } from '@angular/router';
+
+import { OperatorService } from './operator.service';
+
+/**
+ * Classical Auth-Guard. Checks if the user has to correct permissions to enter a page, and forwards to login if not.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class AuthGuard implements CanActivate, CanActivateChild {
+    /**
+     * @param operator
+     */
+    public constructor(private operator: OperatorService) {}
+
+    /**
+     * Checks of the operator has the required permission to see the state.
+     *
+     * One can set extra data to the state with `data: {basePerm: '<perm>'}` or
+     * `data: {basePerm: ['<perm1>', '<perm2>']}` to lock the access to users
+     * only with the given permission(s).
+     *
+     * @param route required by `canActivate()`
+     * @param state the state (URL) that the user want to access
+     */
+    public canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
+        const basePerm: string | string[] = route.data.basePerm;
+
+        if (!basePerm) {
+            return true;
+        } else if (basePerm instanceof Array) {
+            return this.operator.hasPerms(...basePerm);
+        } else {
+            return this.operator.hasPerms(basePerm);
+        }
+    }
+
+    /**
+     * Calls {@method canActivate}. Should have the same logic.
+     * @param route
+     * @param state
+     */
+    public canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
+        return this.canActivate(route, state);
+    }
+}

client/src/app/core/services/auth.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { AuthService } from './auth.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('ConfigService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [AuthService]
+        });
+    });
+
+    it('should be created', inject([AuthService], (service: AuthService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/auth.service.ts

@@ -0,0 +1,77 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { catchError, tap } from 'rxjs/operators';
+
+import { OperatorService } from 'app/core/services/operator.service';
+import { OpenSlidesComponent } from '../../openslides.component';
+import { environment } from 'environments/environment';
+import { User } from '../../shared/models/users/user';
+import { OpenSlidesService } from './openslides.service';
+
+/**
+ * The data returned by a post request to the login route.
+ */
+interface LoginResponse {
+    user_id: number;
+    user: User;
+}
+
+/**
+ * Authenticates an OpenSlides user with username and password
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class AuthService extends OpenSlidesComponent {
+    /**
+     * Initializes the httpClient and the {@link OperatorService}.
+     *
+     * Calls `super()` from the parent class.
+     * @param http HttpClient
+     * @param operator who is using OpenSlides
+     */
+    public constructor(
+        private http: HttpClient,
+        private operator: OperatorService,
+        private OpenSlides: OpenSlidesService
+    ) {
+        super();
+    }
+
+    /**
+     * Try to log in a user.
+     *
+     * Returns an observable 'user' with the correct login information or an error.
+     * The user will then be stored in the {@link OperatorService},
+     * errors will be forwarded to the parents error function.
+     *
+     * @param username
+     * @param password
+     */
+    public login(username: string, password: string): Observable<LoginResponse> {
+        const user = {
+            username: username,
+            password: password
+        };
+        return this.http.post<LoginResponse>(environment.urlPrefix + '/users/login/', user).pipe(
+            tap((response: LoginResponse) => {
+                this.operator.user = new User(response.user);
+            }),
+            catchError(this.handleError())
+        ) as Observable<LoginResponse>;
+    }
+
+    /**
+     * Logout function for both the client and the server.
+     *
+     * Will clear the current {@link OperatorService} and
+     * send a `post`-request to `/apps/users/logout/'`
+     */
+    public logout(): void {
+        this.operator.user = null;
+        this.http.post<any>(environment.urlPrefix + '/users/logout/', {}).subscribe(() => {
+            this.OpenSlides.reboot();
+        });
+    }
+}

client/src/app/core/services/autoupdate.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { AutoupdateService } from './autoupdate.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('AutoupdateService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [AutoupdateService]
+        });
+    });
+
+    it('should be created', inject([AutoupdateService], (service: AutoupdateService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/autoupdate.service.ts

@@ -0,0 +1,88 @@
+import { Injectable } from '@angular/core';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { WebsocketService } from './websocket.service';
+
+import { CollectionStringModelMapperService } from './collectionStringModelMapper.service';
+import { DataStoreService } from './data-store.service';
+
+/**
+ * Handles the initial update and automatic updates using the {@link WebsocketService}
+ * Incoming objects, usually BaseModels, will be saved in the dataStore (`this.DS`)
+ * This service usually creates all models
+ *
+ * The dataStore will injected over the parent class: {@link OpenSlidesComponent}.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class AutoupdateService extends OpenSlidesComponent {
+    /**
+     * Constructor to create the AutoupdateService. Calls the constructor of the parent class.
+     * @param websocketService
+     */
+    public constructor(
+        websocketService: WebsocketService,
+        private DS: DataStoreService,
+        private modelMapper: CollectionStringModelMapperService
+    ) {
+        super();
+        websocketService.getOberservable<any>('autoupdate').subscribe(response => {
+            this.storeResponse(response);
+        });
+    }
+
+    /**
+     * Handle the answer of incoming data via {@link WebsocketService}.
+     *
+     * Bundles the data per action and collection. THis speeds up the caching in the DataStore.
+     *
+     * Detects the Class of an incomming model, creates a new empty object and assigns
+     * the data to it using the deserialize function.
+     *
+     * Saves models in DataStore.
+     */
+    public storeResponse(socketResponse: any): void {
+        // Reorganize the autoupdate: groupy by action, then by collection. The final
+        // entries are the single autoupdate objects.
+        const autoupdate = {
+            changed: {},
+            deleted: {}
+        };
+
+        // Reorganize them.
+        socketResponse.forEach(obj => {
+            if (!autoupdate[obj.action][obj.collection]) {
+                autoupdate[obj.action][obj.collection] = [];
+            }
+            autoupdate[obj.action][obj.collection].push(obj);
+        });
+
+        // Delete the removed objects from the DataStore
+        Object.keys(autoupdate.deleted).forEach(collection => {
+            this.DS.remove(collection, ...autoupdate.deleted[collection].map(_obj => _obj.id));
+        });
+
+        // Add the objects to the DataStore.
+        Object.keys(autoupdate.changed).forEach(collection => {
+            const targetClass = this.modelMapper.getModelConstructor(collection);
+            if (!targetClass) {
+                // TODO: throw an error later..
+                /*throw new Error*/ console.log(`Unregistered resource ${collection}`);
+                return;
+            }
+            this.DS.add(...autoupdate.changed[collection].map(_obj => new targetClass(_obj.data)));
+        });
+    }
+
+    /**
+     * Sends a WebSocket request to the Server with the maxChangeId of the DataStore.
+     * The server should return an autoupdate with all new data.
+     *
+     * TODO: Wait for changeIds to be implemented on the server.
+     */
+    public requestChanges(): void {
+        console.log('requesting changed objects');
+        // this.websocketService.send('changeIdRequest', this.DS.maxChangeId);
+    }
+}

client/src/app/core/services/cache.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { CacheService } from './cache.service';
+
+describe('WebsocketService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [CacheService]
+        });
+    });
+
+    it('should be created', inject([CacheService], (service: CacheService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/cache.service.ts

@@ -0,0 +1,151 @@
+import { Injectable } from '@angular/core';
+import { LocalStorage } from '@ngx-pwa/local-storage';
+import { Observable } from 'rxjs';
+
+/**
+ * Container objects for the setQueue.
+ */
+interface SetContainer {
+    key: string;
+    item: any;
+    callback: (value: boolean) => void;
+}
+
+/**
+ * Container objects for the removeQueue.
+ */
+interface RemoveContainer {
+    key: string;
+    callback: (value: boolean) => void;
+}
+
+/**
+ * Provides an async API to an key-value store using ngx-pwa which is internally
+ * using IndexedDB or localStorage as a fallback.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class CacheService {
+    /**
+     * The queue of waiting set requests. Just one request (with the same key, which is
+     * an often case) at the time can be handeled. The SetContainer encapsulates the key,
+     * item and callback.
+     */
+    private setQueue: SetContainer[] = [];
+
+    /**
+     * The queue of waiting remove requests. Same reason for the queue es the @name _setQueue.
+     */
+    private removeQueue: RemoveContainer[] = [];
+
+    /**
+     * Constructor to create the CacheService. Needs the localStorage service.
+     * @param localStorage
+     */
+    public constructor(private localStorage: LocalStorage) {}
+
+    /**
+     * Sets the item into the store asynchronously.
+     * @param key
+     * @param item
+     * @param callback An optional callback that is called on success
+     */
+    public set(key: string, item: any, callback?: (value: boolean) => void): void {
+        if (!callback) {
+            callback = () => {};
+        }
+
+        // Put the set request into the queue
+        const queueObj: SetContainer = {
+            key: key,
+            item: item,
+            callback: callback
+        };
+        this.setQueue.unshift(queueObj);
+
+        // If this is the only object, put it into the cache.
+        if (this.setQueue.length === 1) {
+            this.localStorage.setItem(key, item).subscribe(this._setCallback.bind(this), this._error);
+        }
+    }
+
+    /**
+     * gets called, if a set of the first item in the queue was successful.
+     * @param value success
+     */
+    private _setCallback(success: boolean): void {
+        // Call the callback and remove the object from the queue
+        this.setQueue[0].callback(success);
+        this.setQueue.pop();
+        // If there are objects left, insert the first one into the cache.
+        if (this.setQueue.length > 0) {
+            const queueObj = this.setQueue[0];
+            this.localStorage.setItem(queueObj.key, queueObj.item).subscribe(this._setCallback.bind(this), this._error);
+        }
+    }
+
+    /**
+     * get a value from the store. You need to subscribe to the request to retrieve the value.
+     * @param key The key to get the value from
+     */
+    public get<T>(key: string): Observable<T> {
+        return this.localStorage.getItem<T>(key);
+    }
+
+    /**
+     * Remove the key from the store.
+     * @param key The key to remove the value from
+     * @param callback An optional callback that is called on success
+     */
+    public remove(key: string, callback?: (value: boolean) => void): void {
+        if (!callback) {
+            callback = () => {};
+        }
+
+        // Put the remove request into the queue
+        const queueObj: RemoveContainer = {
+            key: key,
+            callback: callback
+        };
+        this.removeQueue.unshift(queueObj);
+
+        // If this is the only object, remove it from the cache.
+        if (this.removeQueue.length === 1) {
+            this.localStorage.removeItem(key).subscribe(this._removeCallback.bind(this), this._error);
+        }
+    }
+
+    /**
+     * gets called, if a remove of the first item in the queue was successfull.
+     * @param value success
+     */
+    private _removeCallback(success: boolean): void {
+        // Call the callback and remove the object from the queue
+        this.removeQueue[0].callback(success);
+        this.removeQueue.pop();
+        // If there are objects left, remove the first one from the cache.
+        if (this.removeQueue.length > 0) {
+            const queueObj = this.removeQueue[0];
+            this.localStorage.removeItem(queueObj.key).subscribe(this._removeCallback.bind(this), this._error);
+        }
+    }
+
+    /**
+     * Clear the whole cache
+     * @param callback An optional callback that is called on success
+     */
+    public clear(callback?: (value: boolean) => void): void {
+        if (!callback) {
+            callback = () => {};
+        }
+        this.localStorage.clear().subscribe(callback, this._error);
+    }
+
+    /**
+     * First error catching function.
+     */
+    private _error(): void {
+        console.error('caching error', arguments);
+    }
+}

client/src/app/core/services/collectionStringModelMapper.service.spec.ts

@@ -0,0 +1,3 @@
+describe('CollectionStringModelMapperService', () => {
+    beforeEach(() => {});
+});

client/src/app/core/services/collectionStringModelMapper.service.ts

@@ -0,0 +1,64 @@
+import { Injectable } from '@angular/core';
+import { ModelConstructor, BaseModel } from '../../shared/models/base/base-model';
+
+/**
+ * Registeres the mapping of collection strings <--> actual types. Every Model should register itself here.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class CollectionStringModelMapperService {
+    /**
+     * Mapps collection strings to model constructors. Accessed by {@method registerCollectionElement} and
+     * {@method getCollectionStringType}.
+     */
+    private static collectionStringsTypeMapping: { [collectionString: string]: ModelConstructor<BaseModel> } = {};
+
+    /**
+     * Returns the collection string of a given ModelConstructor or undefined, if it is not registered.
+     * @param ctor
+     * @deprecated Should inject this service and don't use the static functions.
+     */
+    public static getCollectionString(ctor: ModelConstructor<BaseModel>): string {
+        return Object.keys(CollectionStringModelMapperService.collectionStringsTypeMapping).find(
+            (collectionString: string) => {
+                return ctor === CollectionStringModelMapperService.collectionStringsTypeMapping[collectionString];
+            }
+        );
+    }
+
+    /**
+     * Constructor to create the NotifyService. Registers itself to the WebsocketService.
+     * @param websocketService
+     */
+    public constructor() {}
+
+    /**
+     * Registers the type to the collection string
+     * @param collectionString
+     * @param type
+     */
+    public registerCollectionElement(collectionString: string, type: ModelConstructor<BaseModel>): void {
+        CollectionStringModelMapperService.collectionStringsTypeMapping[collectionString] = type;
+    }
+
+    /**
+     * Returns the constructor of the requested collection or undefined, if it is not registered.
+     * @param collectionString the requested collection
+     */
+    public getModelConstructor(collectionString: string): ModelConstructor<BaseModel> {
+        return CollectionStringModelMapperService.collectionStringsTypeMapping[collectionString];
+    }
+
+    /**
+     * Returns the collection string of a given ModelConstructor or undefined, if it is not registered.
+     * @param ctor
+     */
+    public getCollectionString(ctor: ModelConstructor<BaseModel>): string {
+        return Object.keys(CollectionStringModelMapperService.collectionStringsTypeMapping).find(
+            (collectionString: string) => {
+                return ctor === CollectionStringModelMapperService.collectionStringsTypeMapping[collectionString];
+            }
+        );
+    }
+}

client/src/app/core/services/config.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { ConfigService } from './config.service';
+
+describe('ConfigService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [ConfigService]
+        });
+    });
+
+    it('should be created', inject([ConfigService], (service: ConfigService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/config.service.ts

@@ -0,0 +1,76 @@
+import { Injectable } from '@angular/core';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { Observable, BehaviorSubject } from 'rxjs';
+import { Config } from '../../shared/models/core/config';
+import { DataStoreService } from './data-store.service';
+
+/**
+ * Handler for config variables.
+ *
+ * @example
+ * ```ts
+ * this.configService.get('general_event_name').subscribe(value => {
+ *     console.log(value);
+ * });
+ * ```
+ *
+ * @example
+ * ```ts
+ * const value = this.configService.instant('general_event_name');
+ * ```
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class ConfigService extends OpenSlidesComponent {
+    /**
+     * Stores a subject per key. Values are published, if the DataStore gets an update.
+     */
+    private configSubjects: { [key: string]: BehaviorSubject<any> } = {};
+
+    /**
+     * Listen for changes of config variables.
+     */
+    public constructor(private DS: DataStoreService) {
+        super();
+
+        this.DS.changeObservable.subscribe(data => {
+            // on changes notify the observers for specific keys.
+            if (data instanceof Config && this.configSubjects[data.key]) {
+                this.configSubjects[data.key].next(data.value);
+            }
+        });
+    }
+
+    /**
+     * Get the constant named by key from the DataStore. If the DataStore isn't up to date or
+     * not filled via autoupdates the results may be wrong/empty. Use this with caution.
+     *
+     * Usefull for synchronos code, e.g. during generation of PDFs, when the DataStore is filled.
+     *
+     * @param key The config value to get from.
+     */
+    public instant(key: string): any {
+        const values = this.DS.filter<Config>('core/config', value => value.key === key);
+        if (values.length > 1) {
+            throw new Error('More keys found then expected');
+        } else if (values.length === 1) {
+            return values[0].value;
+        } else {
+            return;
+        }
+    }
+
+    /**
+     * Get an observer for the config value given by the key.
+     *
+     * @param key The config value to get from.
+     */
+    public get(key: string): Observable<any> {
+        if (!this.configSubjects[key]) {
+            this.configSubjects[key] = new BehaviorSubject<any>(this.instant(key));
+        }
+        return this.configSubjects[key].asObservable();
+    }
+}

client/src/app/core/services/constants.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { ConstantsService } from './constants.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('ConstantsService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [ConstantsService]
+        });
+    });
+
+    it('should be created', inject([ConstantsService], (service: ConstantsService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/constants.service.ts

@@ -0,0 +1,97 @@
+import { Injectable } from '@angular/core';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { WebsocketService } from './websocket.service';
+import { Observable, of, Subject } from 'rxjs';
+
+/**
+ * constants have a key associated with the data.
+ */
+interface Constants {
+    [key: string]: any;
+}
+
+/**
+ * Get constants from the server.
+ *
+ * @example
+ * ```ts
+ * this.constantsService.get('OpenSlidesSettings').subscribe(constant => {
+ *     console.log(constant);
+ * });
+ * ```
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class ConstantsService extends OpenSlidesComponent {
+    /**
+     * The constants
+     */
+    private constants: Constants;
+
+    /**
+     * Flag, if the websocket connection is open.
+     */
+    private websocketOpen = false;
+
+    /**
+     * Flag, if constants are requested, but the server hasn't send them yet.
+     */
+    private pending = false;
+
+    /**
+     * Pending requests will be notified by these subjects, one per key.
+     */
+    private pendingSubject: { [key: string]: Subject<any> } = {};
+
+    /**
+     * @param websocketService
+     */
+    public constructor(private websocketService: WebsocketService) {
+        super();
+
+        // The hook for recieving constants.
+        websocketService.getOberservable<Constants>('constants').subscribe(constants => {
+            this.constants = constants;
+            if (this.pending) {
+                // send constants to subscribers that await constants.
+                this.pending = false;
+                Object.keys(this.pendingSubject).forEach(key => {
+                    this.pendingSubject[key].next(this.constants[key]);
+                });
+            }
+        });
+
+        // We can request constants, if the websocket connection opens.
+        websocketService.connectEvent.subscribe(() => {
+            if (!this.websocketOpen && this.pending) {
+                this.websocketService.send('constants', {});
+            }
+            this.websocketOpen = true;
+        });
+    }
+
+    /**
+     * Get the constant named by key.
+     * @param key The constant to get.
+     */
+    public get(key: string): Observable<any> {
+        if (this.constants) {
+            return of(this.constants[key]);
+        } else {
+            // we have to request constants.
+            if (!this.pending) {
+                this.pending = true;
+                // if the connection is open, we directly can send the request.
+                if (this.websocketOpen) {
+                    this.websocketService.send('constants', {});
+                }
+            }
+            if (!this.pendingSubject[key]) {
+                this.pendingSubject[key] = new Subject<any>();
+            }
+            return this.pendingSubject[key].asObservable();
+        }
+    }
+}

client/src/app/core/services/data-send.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { DataSendService } from './data-send.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('DataSendService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [DataSendService]
+        });
+    });
+
+    it('should be created', inject([DataSendService], (service: DataSendService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/data-send.service.ts

@@ -0,0 +1,89 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { BaseModel } from '../../shared/models/base/base-model';
+import { Observable } from 'rxjs';
+import { tap } from 'rxjs/operators';
+
+/**
+ * Send data back to server
+ *
+ * Contrast to dataStore service
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class DataSendService {
+    /**
+     * Construct a DataSendService
+     *
+     * @param http The HTTP Client
+     */
+    public constructor(private http: HttpClient) {}
+
+    /**
+     * Sends a post request with the model to the server.
+     * Usually for new Models
+     */
+    public createModel(model: BaseModel): Observable<BaseModel> {
+        return this.http.post<BaseModel>('rest/' + model.collectionString + '/', model).pipe(
+            tap(
+                response => {
+                    // TODO: Message, Notify, Etc
+                    console.log('New Model added. Response ::\n', response);
+                },
+                error => console.error('createModel has returned an Error:\n', error)
+            )
+        );
+    }
+
+    /**
+     * Function to change a model on the server.
+     *
+     * @param model the base model that is meant to be changed
+     * @param method the required http method. might be put or patch
+     */
+    public updateModel(model: BaseModel, method: 'put' | 'patch'): Observable<BaseModel> {
+        const restPath = `rest/${model.collectionString}/${model.id}`;
+        let httpMethod;
+
+        if (method === 'patch') {
+            httpMethod = this.http.patch<BaseModel>(restPath, model);
+        } else if (method === 'put') {
+            httpMethod = this.http.put<BaseModel>(restPath, model);
+        }
+
+        return httpMethod.pipe(
+            tap(
+                response => {
+                    // TODO: Message, Notify, Etc
+                    console.log('Update model. Response ::\n', response);
+                },
+                error => console.error('updateModel has returned an Error:\n', error)
+            )
+        );
+    }
+
+    /**
+     * Deletes the given model on the server
+     *
+     * @param model the BaseModel that shall be removed
+     * @return Observable of BaseModel
+     *
+     * TODO Not tested
+     */
+    public delete(model: BaseModel): Observable<BaseModel> {
+        if (model.id) {
+            return this.http.delete<BaseModel>('rest/' + model.collectionString + '/' + model.id).pipe(
+                tap(
+                    response => {
+                        // TODO: Message, Notify, Etc
+                        console.log('the response: ', response);
+                    },
+                    error => console.error('error during delete: ', error)
+                )
+            );
+        } else {
+            console.error('No model ID to delete');
+        }
+    }
+}

client/src/app/core/services/data-store.service.spec.ts

@@ -0,0 +1,11 @@
+import { TestBed } from '@angular/core/testing';
+
+import { DataStoreService } from './data-store.service';
+
+describe('DS', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [DataStoreService]
+        });
+    });
+});

client/src/app/core/services/data-store.service.ts

@@ -0,0 +1,338 @@
+import { Injectable } from '@angular/core';
+import { Observable, Subject } from 'rxjs';
+
+import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
+import { CacheService } from './cache.service';
+import { CollectionStringModelMapperService } from './collectionStringModelMapper.service';
+
+/**
+ * Represents information about a deleted model.
+ *
+ * As the model doesn't exist anymore, just the former id and collection is known.
+ */
+export interface DeletedInformation {
+    collection: string;
+    id: number;
+}
+
+/**
+ * represents a collection on the Django server, uses an ID to access a {@link BaseModel}.
+ *
+ * Part of {@link DataStoreService}
+ */
+interface ModelCollection {
+    [id: number]: BaseModel;
+}
+
+/**
+ * Represents a serialized collection.
+ */
+interface JsonCollection {
+    [id: number]: string;
+}
+
+/**
+ * The actual storage that stores collections, accessible by strings.
+ *
+ * {@link DataStoreService}
+ */
+interface ModelStorage {
+    [collectionString: string]: ModelCollection;
+}
+
+/**
+ * A storage of serialized collection elements.
+ */
+interface JsonStorage {
+    [collectionString: string]: JsonCollection;
+}
+
+/**
+ * All mighty DataStore that comes with all OpenSlides components.
+ * Use this.DS in an OpenSlides Component to Access the store.
+ * Used by a lot of components, classes and services.
+ * Changes can be observed
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class DataStoreService {
+    private static cachePrefix = 'DS:';
+
+    /** We will store the data twice: One as instances of the actual models in the _store
+     * and one serialized version in the _serializedStore for the cache. Both should be updated in
+     * all cases equal!
+     */
+    private modelStore: ModelStorage = {};
+    private JsonStore: JsonStorage = {};
+
+    /**
+     * Observable subject for changed models in the datastore.
+     */
+    private changedSubject: Subject<BaseModel> = new Subject<BaseModel>();
+
+    /**
+     * Observe the datastore for changes.
+     *
+     * @return an observable for changed models
+     */
+    public get changeObservable(): Observable<BaseModel> {
+        return this.changedSubject.asObservable();
+    }
+
+    /**
+     * Observable subject for changed models in the datastore.
+     */
+    private deletedSubject: Subject<DeletedInformation> = new Subject<DeletedInformation>();
+
+    /**
+     * Observe the datastore for deletions.
+     *
+     * @return an observable for deleted objects.
+     */
+    public get deletedObservable(): Observable<DeletedInformation> {
+        return this.deletedSubject.asObservable();
+    }
+
+    /**
+     * The maximal change id from this DataStore.
+     */
+    private _maxChangeId = 0;
+
+    /**
+     * returns the maxChangeId of the DataStore.
+     */
+    public get maxChangeId(): number {
+        return this._maxChangeId;
+    }
+
+    /**
+     * Empty constructor for dataStore
+     * @param cacheService use CacheService to cache the DataStore.
+     */
+    public constructor(private cacheService: CacheService, private modelMapper: CollectionStringModelMapperService) {}
+
+    /**
+     * Gets the DataStore from cache and instantiate all models out of the serialized version.
+     */
+    public initFromCache(): Promise<number> {
+        // This promise will be resolved with the maximal change id of the cache.
+        return new Promise<number>(resolve => {
+            this.cacheService.get<JsonStorage>(DataStoreService.cachePrefix + 'DS').subscribe((store: JsonStorage) => {
+                if (store != null) {
+                    // There is a store. Deserialize it
+                    this.JsonStore = store;
+                    this.modelStore = this.deserializeJsonStore(this.JsonStore);
+                    // Get the maxChangeId from the cache
+                    this.cacheService
+                        .get<number>(DataStoreService.cachePrefix + 'maxChangeId')
+                        .subscribe((maxChangeId: number) => {
+                            if (maxChangeId == null) {
+                                maxChangeId = 0;
+                            }
+                            this._maxChangeId = maxChangeId;
+                            resolve(maxChangeId);
+                        });
+                } else {
+                    // No store here, so get all data from the server.
+                    resolve(0);
+                }
+            });
+        });
+    }
+
+    /**
+     * Deserialze the given serializedStorage and returns a Storage.
+     */
+    private deserializeJsonStore(serializedStore: JsonStorage): ModelStorage {
+        const storage: ModelStorage = {};
+        Object.keys(serializedStore).forEach(collectionString => {
+            storage[collectionString] = {} as ModelCollection;
+            const target = this.modelMapper.getModelConstructor(collectionString);
+            if (target) {
+                Object.keys(serializedStore[collectionString]).forEach(id => {
+                    const data = JSON.parse(serializedStore[collectionString][id]);
+                    storage[collectionString][id] = new target(data);
+                });
+            }
+        });
+        return storage;
+    }
+
+    /**
+     * Clears the complete DataStore and Cache.
+     * @param callback
+     */
+    public clear(callback?: (value: boolean) => void): void {
+        this.modelStore = {};
+        this.JsonStore = {};
+        this._maxChangeId = 0;
+        this.cacheService.remove(DataStoreService.cachePrefix + 'DS', () => {
+            this.cacheService.remove(DataStoreService.cachePrefix + 'maxChangeId', callback);
+        });
+    }
+
+    private getCollectionString<T extends BaseModel<T>>(collectionType: ModelConstructor<T> | string): string {
+        if (typeof collectionType === 'string') {
+            return collectionType;
+        } else {
+            return this.modelMapper.getCollectionString(collectionType);
+        }
+    }
+
+    /**
+     * Read one model based on the collection and id from the DataStore.
+     *
+     * @param collectionType The desired BaseModel or collectionString to be read from the dataStore
+     * @param ids One ID of the BaseModel
+     * @return The given BaseModel-subclass instance
+     * @example: this.DS.get(User, 1)
+     * @example: this.DS.get<Countdown>('core/countdown', 2)
+     */
+    public get<T extends BaseModel<T>>(collectionType: ModelConstructor<T> | string, id: number): T {
+        const collectionString = this.getCollectionString<T>(collectionType);
+
+        const collection: ModelCollection = this.modelStore[collectionString];
+        if (!collection) {
+            return;
+        } else {
+            return collection[id] as T;
+        }
+    }
+
+    /**
+     * Read multiple ID's from dataStore.
+     *
+     * @param collectionType The desired BaseModel or collectionString to be read from the dataStore
+     * @param ids Multiple IDs as a list of IDs of BaseModel
+     * @return The BaseModel-list corresponding to the given ID(s)
+     * @example: this.DS.getMany(User, [1,2,3,4,5])
+     * @example: this.DS.getMany<User>('users/user', [1,2,3,4,5])
+     */
+    public getMany<T extends BaseModel<T>>(collectionType: ModelConstructor<T> | string, ids: number[]): T[] {
+        const collectionString = this.getCollectionString<T>(collectionType);
+
+        const collection: ModelCollection = this.modelStore[collectionString];
+        if (!collection) {
+            return [];
+        }
+        const models = ids
+            .map(id => {
+                return collection[id];
+            })
+            .filter(model => !!model); // remove non valid models.
+        return models as T[];
+    }
+
+    /**
+     * Get all models of the given collection from the DataStore.
+     *
+     * @param collectionType The desired BaseModel or collectionString to be read from the dataStore
+     * @return The BaseModel-list of all instances of T
+     * @example: this.DS.getAll(User)
+     * @example: this.DS.getAll<User>('users/user')
+     */
+    public getAll<T extends BaseModel<T>>(collectionType: ModelConstructor<T> | string): T[] {
+        const collectionString = this.getCollectionString<T>(collectionType);
+
+        const collection: ModelCollection = this.modelStore[collectionString];
+        if (!collection) {
+            return [];
+        } else {
+            return Object.values(collection);
+        }
+    }
+
+    /**
+     * Filters the dataStore by type.
+     *
+     * @param collectionType The desired BaseModel type to be read from the dataStore
+     * @param callback a filter function
+     * @return The BaseModel-list corresponding to the filter function
+     * @example this.DS.filter<User>(User, myUser => myUser.first_name === "Max")
+     */
+    public filter<T extends BaseModel<T>>(
+        collectionType: ModelConstructor<T> | string,
+        callback: (model: T) => boolean
+    ): T[] {
+        return this.getAll<T>(collectionType).filter(callback);
+    }
+
+    /**
+     * Add one or multiple models to dataStore.
+     *
+     * @param ...models The model(s) that shall be add use spread operator ("...")
+     * @example this.DS.add(new User(1))
+     * @example this.DS.add((new User(2), new User(3)))
+     * @example this.DS.add(...arrayWithUsers)
+     */
+    public add(...models: BaseModel[]): void {
+        const maxChangeId = 0;
+        models.forEach(model => {
+            const collectionString = model.collectionString;
+            if (!model.id) {
+                throw new Error('The model must have an id!');
+            } else if (collectionString === 'invalid-collection-string') {
+                throw new Error('Cannot save a BaseModel');
+            }
+            if (this.modelStore[collectionString] === undefined) {
+                this.modelStore[collectionString] = {};
+            }
+            this.modelStore[collectionString][model.id] = model;
+
+            if (this.JsonStore[collectionString] === undefined) {
+                this.JsonStore[collectionString] = {};
+            }
+            this.JsonStore[collectionString][model.id] = JSON.stringify(model);
+            // if (model.changeId > maxChangeId) {maxChangeId = model.maxChangeId;}
+            this.changedSubject.next(model);
+        });
+        this.storeToCache(maxChangeId);
+    }
+
+    /**
+     * removes one or multiple models from dataStore.
+     *
+     * @param Type   The desired BaseModel type to be read from the dataStore
+     * @param ...ids An or multiple IDs or a list of IDs of BaseModels. use spread operator ("...") for arrays
+     * @example this.DS.remove('users/user', myUser.id, 3, 4)
+     */
+    public remove(collectionString: string, ...ids: number[]): void {
+        const maxChangeId = 0;
+        ids.forEach(id => {
+            if (this.modelStore[collectionString]) {
+                // get changeId from store
+                // if (model.changeId > maxChangeId) {maxChangeId = model.maxChangeId;}
+                delete this.modelStore[collectionString][id];
+            }
+            if (this.JsonStore[collectionString]) {
+                delete this.JsonStore[collectionString][id];
+            }
+            this.deletedSubject.next({
+                collection: collectionString,
+                id: id
+            });
+        });
+        this.storeToCache(maxChangeId);
+    }
+
+    /**
+     * Updates the cache by inserting the serialized DataStore. Also changes the chageId, if it's larger
+     * @param maxChangeId
+     */
+    private storeToCache(maxChangeId: number): void {
+        this.cacheService.set(DataStoreService.cachePrefix + 'DS', this.JsonStore);
+        if (maxChangeId > this._maxChangeId) {
+            this._maxChangeId = maxChangeId;
+            this.cacheService.set(DataStoreService.cachePrefix + 'maxChangeId', maxChangeId);
+        }
+    }
+
+    /**
+     * Prints the whole dataStore
+     * @deprecated Shouldn't be used, will be removed later
+     */
+    public printWhole(): void {
+        console.log('Everything in DataStore: ', this.modelStore);
+    }
+}

client/src/app/core/services/login-data.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { LoginDataService } from './login-data.service';
+
+describe('LoginDataService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [LoginDataService]
+        });
+    });
+
+    it('should be created', inject([LoginDataService], (service: LoginDataService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/login-data.service.ts

@@ -0,0 +1,70 @@
+import { Injectable } from '@angular/core';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { ConfigService } from './config.service';
+import { BehaviorSubject, Observable } from 'rxjs';
+
+/**
+ * This service holds the privacy policy and the legal notice, so they are available
+ * even if the user is not logged in.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class LoginDataService extends OpenSlidesComponent {
+    /**
+     * Holds the privacy policy
+     */
+    private _privacy_policy = new BehaviorSubject<string>('');
+
+    /**
+     * Returns an observable for the privacy policy
+     */
+    public get privacy_policy(): Observable<string> {
+        return this._privacy_policy.asObservable();
+    }
+
+    /**
+     * Holds the legal notice
+     */
+    private _legal_notice = new BehaviorSubject<string>('');
+
+    /**
+     * Returns an observable for the legal notice
+     */
+    public get legal_notice(): Observable<string> {
+        return this._legal_notice.asObservable();
+    }
+
+    /**
+     * Constructs this service. The config service is needed to update the privacy
+     * policy and legal notice, when their config values change.
+     * @param configService
+     */
+    public constructor(private configService: ConfigService) {
+        super();
+
+        this.configService.get('general_event_privacy_policy').subscribe(value => {
+            this.setPrivacyPolicy(value);
+        });
+        this.configService.get('general_event_legal_notice').subscribe(value => {
+            this.setLegalNotice(value);
+        });
+    }
+
+    /**
+     * Setter for the privacy policy
+     * @param privacyPolicy The new privacy policy to set
+     */
+    public setPrivacyPolicy(privacyPolicy: string): void {
+        this._privacy_policy.next(privacyPolicy);
+    }
+
+    /**
+     * Setter for the legal notice
+     * @param legalNotice The new legal notice to set
+     */
+    public setLegalNotice(legalNotice: string): void {
+        this._legal_notice.next(legalNotice);
+    }
+}

client/src/app/core/services/main-menu.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { MainMenuService } from './main-menu.service';
+
+describe('MainMenuService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [MainMenuService]
+        });
+    });
+
+    it('should be created', inject([MainMenuService], (service: MainMenuService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/main-menu.service.ts

@@ -0,0 +1,61 @@
+import { Injectable } from '@angular/core';
+
+/**
+ * This represents one entry in the main menu
+ */
+export interface MainMenuEntry {
+    /**
+     * The route for the router to navigate to on click.
+     */
+    route: string;
+    /**
+     * The display string to be shown.
+     */
+    displayName: string;
+
+    /**
+     * The font awesom icon to display.
+     */
+    icon: string;
+
+    /**
+     * For sorting the entries.
+     */
+    weight: number;
+
+    /**
+     * The permission to see the entry.
+     */
+    permission: string;
+}
+
+/**
+ * Collects main menu entries and provides them to the main menu component.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class MainMenuService {
+    /**
+     * A list of sorted entries.
+     */
+    private _entries: MainMenuEntry[] = [];
+
+    /**
+     * Make the entries public.
+     */
+    public get entries(): MainMenuEntry[] {
+        return this._entries;
+    }
+
+    public constructor() {}
+
+    /**
+     * Adds entries to the mainmenu.
+     * @param entries The entries to add
+     */
+    public registerEntries(entries: MainMenuEntry[]): void {
+        this._entries.push(...entries);
+        this._entries = this._entries.sort((a, b) => a.weight - b.weight);
+    }
+}

client/src/app/core/services/notify.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { NotifyService } from './notify.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('NotifyService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [NotifyService]
+        });
+    });
+
+    it('should be created', inject([NotifyService], (service: NotifyService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/notify.service.ts

@@ -0,0 +1,42 @@
+import { Injectable } from '@angular/core';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { WebsocketService } from './websocket.service';
+
+interface NotifyFormat {
+    id: number; // Dummy
+}
+
+/**
+ * Handles all incoming and outgoing notify messages via {@link WebsocketService}.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class NotifyService extends OpenSlidesComponent {
+    /**
+     * Constructor to create the NotifyService. Registers itself to the WebsocketService.
+     * @param websocketService
+     */
+    public constructor(private websocketService: WebsocketService) {
+        super();
+        websocketService.getOberservable<any>('notify').subscribe(notify => {
+            this.receive(notify);
+        });
+    }
+
+    // TODO: Implement this
+    private receive(notify: NotifyFormat): void {
+        console.log('recv', notify);
+        // TODO: Use a Subject, so one can subscribe and get notifies.
+    }
+
+    // TODO: Make this api better: e.g. send(data, users?, projectors?, channel?, ...)
+    /**
+     * Sents a notify object to the server
+     * @param notify the notify objects
+     */
+    public send(notify: NotifyFormat): void {
+        this.websocketService.send('notify', notify);
+    }
+}

client/src/app/core/services/openslides.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { OpenSlidesService } from './openslides.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('OpenSlidesService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [OpenSlidesService]
+        });
+    });
+
+    it('should be created', inject([OpenSlidesService], (service: OpenSlidesService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/openslides.service.ts

@@ -0,0 +1,139 @@
+import { Injectable } from '@angular/core';
+import { Router } from '@angular/router';
+
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { WebsocketService } from './websocket.service';
+import { OperatorService } from './operator.service';
+import { CacheService } from './cache.service';
+import { AutoupdateService } from './autoupdate.service';
+import { DataStoreService } from './data-store.service';
+
+/**
+ * Handles the bootup/showdown of this application.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class OpenSlidesService extends OpenSlidesComponent {
+    /**
+     * if the user tries to access a certain URL without being authenticated, the URL will be stored here
+     */
+    public redirectUrl: string;
+
+    /**
+     * Constructor to create the NotifyService. Registers itself to the WebsocketService.
+     * @param cacheService
+     * @param operator
+     * @param websocketService
+     * @param router
+     * @param autoupdateService
+     */
+    public constructor(
+        private cacheService: CacheService,
+        private operator: OperatorService,
+        private websocketService: WebsocketService,
+        private router: Router,
+        private autoupdateService: AutoupdateService,
+        private DS: DataStoreService
+    ) {
+        super();
+
+        // Handler that gets called, if the websocket connection reconnects after a disconnection.
+        // There might have changed something on the server, so we check the operator, if he changed.
+        websocketService.reconnectEvent.subscribe(() => {
+            this.checkOperator();
+        });
+
+        this.bootup();
+    }
+
+    /**
+     * the bootup-sequence: Do a whoami request and if it was successful, do
+     * {@method afterLoginBootup}. If not, redirect the user to the login page.
+     */
+    public bootup(): void {
+        // start autoupdate if the user is logged in:
+        this.operator.whoAmI().subscribe(resp => {
+            this.operator.guestsEnabled = resp.guest_enabled;
+            if (!resp.user && !resp.guest_enabled) {
+                this.redirectUrl = location.pathname;
+                // Goto login, if the user isn't login and guests are not allowed
+                this.router.navigate(['/login']);
+            } else {
+                this.afterLoginBootup(resp.user_id);
+            }
+        });
+    }
+
+    /**
+     * the login bootup-sequence: Check (and maybe clear) the cache und setup the DataStore
+     * and websocket.
+     * @param userId
+     */
+    public afterLoginBootup(userId: number): void {
+        // Else, check, which user was logged in last time
+        this.cacheService.get<number>('lastUserLoggedIn').subscribe((id: number) => {
+            // if the user id changed, reset the cache.
+            if (userId !== id) {
+                this.DS.clear((value: boolean) => {
+                    this.setupDataStoreAndWebSocket();
+                });
+                this.cacheService.set('lastUserLoggedIn', userId);
+            } else {
+                this.setupDataStoreAndWebSocket();
+            }
+        });
+    }
+
+    /**
+     * Init DS from cache and after this start the websocket service.
+     */
+    private setupDataStoreAndWebSocket(): void {
+        this.DS.initFromCache().then((changeId: number) => {
+            this.websocketService.connect(
+                false,
+                changeId
+            );
+        });
+    }
+
+    /**
+     * SHuts down OpenSlides. The websocket is closed and the operator is not set.
+     */
+    public shutdown(): void {
+        this.websocketService.close();
+        this.operator.user = null;
+    }
+
+    /**
+     * Shutdown and bootup.
+     */
+    public reboot(): void {
+        this.shutdown();
+        this.bootup();
+    }
+
+    /**
+     * Verify that the operator is the same as it was before a reconnect.
+     */
+    private checkOperator(): void {
+        this.operator.whoAmI().subscribe(resp => {
+            // User logged off.
+            if (!resp.user && !resp.guest_enabled) {
+                this.shutdown();
+                this.router.navigate(['/login']);
+            } else {
+                if (
+                    (this.operator.user && this.operator.user.id !== resp.user_id) ||
+                    (!this.operator.user && resp.user_id)
+                ) {
+                    // user changed
+                    this.reboot();
+                } else {
+                    // User is still the same, but check for missed autoupdates.
+                    this.autoupdateService.requestChanges();
+                }
+            }
+        });
+    }
+}

client/src/app/core/services/operator.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { OperatorService } from './operator.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('OperatorService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [OperatorService]
+        });
+    });
+
+    it('should be created', inject([OperatorService], (service: OperatorService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/operator.service.ts

@@ -0,0 +1,157 @@
+import { Injectable } from '@angular/core';
+import { Observable, BehaviorSubject } from 'rxjs';
+import { HttpClient } from '@angular/common/http';
+import { tap, catchError } from 'rxjs/operators';
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { Group } from 'app/shared/models/users/group';
+import { User } from '../../shared/models/users/user';
+import { environment } from 'environments/environment';
+import { DataStoreService } from './data-store.service';
+
+/**
+ * Permissions on the client are just strings. This makes clear, that
+ * permissions instead of arbitrary strings should be given.
+ */
+export type Permission = string;
+
+/**
+ * Response format of the WHoAMI request.
+ */
+interface WhoAmIResponse {
+    user_id: number;
+    guest_enabled: boolean;
+    user: User;
+}
+
+/**
+ * The operator represents the user who is using OpenSlides.
+ *
+ * Changes in operator can be observed, directives do so on order to show
+ * or hide certain information.
+ *
+ * The operator is an {@link OpenSlidesComponent}.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class OperatorService extends OpenSlidesComponent {
+    /**
+     * The operator.
+     */
+    private _user: User;
+
+    /**
+     * Get the user that corresponds to operator.
+     */
+    public get user(): User {
+        return this._user;
+    }
+
+    /**
+     * Sets the current operator.
+     *
+     * The permissions are updated and the new user published.
+     */
+    public set user(user: User) {
+        this._user = user;
+        this.updatePermissions();
+    }
+
+    /**
+     * Save, if quests are enabled.
+     */
+    public guestsEnabled: boolean;
+
+    /**
+     * The permissions of the operator. Updated via {@method updatePermissions}.
+     */
+    private permissions: Permission[] = [];
+
+    /**
+     * The subject that can be observed by other instances using observing functions.
+     */
+    private operatorSubject: BehaviorSubject<User> = new BehaviorSubject<User>(null);
+
+    /**
+     * @param http HttpClient
+     */
+    public constructor(private http: HttpClient, private DS: DataStoreService) {
+        super();
+
+        this.DS.changeObservable.subscribe(newModel => {
+            if (this._user) {
+                if (newModel instanceof Group) {
+                    this.updatePermissions();
+                }
+
+                if (newModel instanceof User && this._user.id === newModel.id) {
+                    this._user = newModel;
+                    this.updatePermissions();
+                }
+            } else if (newModel instanceof Group && newModel.id === 1) {
+                // Group 1 (default) for anonymous changed
+                this.updatePermissions();
+            }
+        });
+    }
+
+    /**
+     * Calls `/apps/users/whoami` to find out the real operator.
+     */
+    public whoAmI(): Observable<WhoAmIResponse> {
+        return this.http.get<WhoAmIResponse>(environment.urlPrefix + '/users/whoami/').pipe(
+            tap((response: WhoAmIResponse) => {
+                if (response && response.user_id) {
+                    this.user = new User(response.user);
+                }
+            }),
+            catchError(this.handleError())
+        ) as Observable<WhoAmIResponse>;
+    }
+
+    /**
+     * Returns the operatorSubject as an observable.
+     *
+     * Services an components can use it to get informed when something changes in
+     * the operator
+     */
+    public getObservable(): Observable<User> {
+        return this.operatorSubject.asObservable();
+    }
+
+    /**
+     * Checks, if the operator has at least one of the given permissions.
+     * @param checkPerms The permissions to check, if at least one matches.
+     */
+    public hasPerms(...checkPerms: Permission[]): boolean {
+        if (this._user && this._user.groups_id.includes(2)) {
+            return true;
+        }
+        return checkPerms.some(permission => {
+            return this.permissions.includes(permission);
+        });
+    }
+
+    /**
+     * Update the operators permissions and publish the operator afterwards.
+     */
+    private updatePermissions(): void {
+        this.permissions = [];
+        if (!this.user) {
+            const defaultGroup = this.DS.get<Group>('users/group', 1);
+            if (defaultGroup && defaultGroup.permissions instanceof Array) {
+                this.permissions = defaultGroup.permissions;
+            }
+        } else {
+            const permissionSet = new Set();
+            this.DS.getMany(Group, this.user.groups_id).forEach(group => {
+                group.permissions.forEach(permission => {
+                    permissionSet.add(permission);
+                });
+            });
+            this.permissions = Array.from(permissionSet.values());
+        }
+        // publish changes in the operator.
+        this.operatorSubject.next(this.user);
+    }
+}

client/src/app/core/services/prompt.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { PromptService } from './prompt.service';
+import { E2EImportsModule } from 'e2e-imports.module';
+
+describe('PromptService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [PromptService]
+        });
+    });
+
+    it('should be created', inject([PromptService], (service: PromptService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/prompt.service.ts

@@ -0,0 +1,30 @@
+import { Injectable } from '@angular/core';
+import { OpenSlidesComponent } from 'app/openslides.component';
+import { PromptDialogComponent } from '../../shared/components/prompt-dialog/prompt-dialog.component';
+import { MatDialog } from '@angular/material';
+
+/**
+ * A general service for prompting 'yes' or 'cancel' thinks from the user.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class PromptService extends OpenSlidesComponent {
+    public constructor(private dialog: MatDialog) {
+        super();
+    }
+
+    /**
+     * Opens the dialog. Returns true, if the user accepts.
+     * @param title The title to display in the dialog
+     * @param content The content in the dialog
+     */
+    public async open(title: string, content: string): Promise<any> {
+        const dialogRef = this.dialog.open(PromptDialogComponent, {
+            width: '250px',
+            data: { title: title, content: content }
+        });
+
+        return dialogRef.afterClosed().toPromise();
+    }
+}

client/src/app/core/services/viewport.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { ViewportService } from './viewport.service';
+
+describe('ViewportService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            providers: [ViewportService]
+        });
+    });
+
+    it('should be created', inject([ViewportService], (service: ViewportService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/viewport.service.ts

@@ -0,0 +1,58 @@
+import { Injectable } from '@angular/core';
+import { BreakpointObserver, Breakpoints, BreakpointState } from '@angular/cdk/layout';
+
+/**
+ * Viewport Service
+ *
+ * Uses breakpoint observers to determine the size of the users/operators viewport size (the device)
+ *
+ * ## Example:
+ *
+ * Provide the service via constructor and just use it like
+ *
+ * ```html
+ * <div *ngIf="!vp.isMobile">Will only be shown of not mobile</div>
+ * ```
+ * or
+ * ```ts
+ * if (this.vp.isMobile) {
+ *     ...
+ * }
+ * ```
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class ViewportService {
+    /**
+     * True if Viewport equals mobile or small resolution.
+     */
+    private _isMobile = false;
+
+    /**
+     * Get the BreakpointObserver
+     *
+     * @param breakpointObserver
+     */
+    public constructor(private breakpointObserver: BreakpointObserver) {}
+
+    /**
+     * Needs to be called (exactly) once.
+     * Will observe breakpoints and updates the _isMobile variable
+     */
+    public checkForChange(): void {
+        this.breakpointObserver
+            .observe([Breakpoints.Small, Breakpoints.HandsetPortrait])
+            .subscribe((state: BreakpointState) => {
+                if (state.matches) {
+                    this._isMobile = true;
+                } else {
+                    this._isMobile = false;
+                }
+            });
+    }
+
+    public get isMobile(): boolean {
+        return this._isMobile;
+    }
+}

client/src/app/core/services/websocket.service.spec.ts

@@ -0,0 +1,17 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { WebsocketService } from './websocket.service';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('WebsocketService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [WebsocketService]
+        });
+    });
+
+    it('should be created', inject([WebsocketService], (service: WebsocketService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/services/websocket.service.ts

@@ -0,0 +1,239 @@
+import { Injectable, NgZone, EventEmitter } from '@angular/core';
+import { Router } from '@angular/router';
+import { Observable, Subject } from 'rxjs';
+import { MatSnackBar, MatSnackBarRef, SimpleSnackBar } from '@angular/material';
+import { TranslateService } from '@ngx-translate/core';
+
+/**
+ * A key value mapping for params, that should be appendet to the url on a new connection.
+ */
+interface QueryParams {
+    [key: string]: string;
+}
+
+/**
+ * The generic message format in which messages are send and recieved by the server.
+ */
+interface WebsocketMessage {
+    type: string;
+    content: any;
+    id: string;
+}
+
+/**
+ * Service that handles WebSocket connections. Other services can register themselfs
+ * with {@method getOberservable} for a specific type of messages. The content will be published.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class WebsocketService {
+    /**
+     * The reference to the snackbar entry that is shown, if the connection is lost.
+     */
+    private connectionErrorNotice: MatSnackBarRef<SimpleSnackBar>;
+
+    /**
+     * Subjects that will be called, if a reconnect was successful.
+     */
+    private _reconnectEvent: EventEmitter<void> = new EventEmitter<void>();
+
+    /**
+     * Getter for the reconnect event.
+     */
+    public get reconnectEvent(): EventEmitter<void> {
+        return this._reconnectEvent;
+    }
+
+    /**
+     * Listeners will be nofitied, if the wesocket connection is establiched.
+     */
+    private _connectEvent: EventEmitter<void> = new EventEmitter<void>();
+
+    /**
+     * Getter for the connect event.
+     */
+    public get connectEvent(): EventEmitter<void> {
+        return this._connectEvent;
+    }
+
+    /**
+     * The websocket.
+     */
+    private websocket: WebSocket;
+
+    /**
+     * Subjects for types of websocket messages. A subscriber can get an Observable by {@function getOberservable}.
+     */
+    private subjects: { [type: string]: Subject<any> } = {};
+
+    /**
+     * Constructor that handles the router
+     * @param router the URL Router
+     */
+    public constructor(
+        private router: Router,
+        private matSnackBar: MatSnackBar,
+        private zone: NgZone,
+        public translate: TranslateService
+    ) {}
+
+    /**
+     * Creates a new WebSocket connection and handles incomming events.
+     *
+     * Uses NgZone to let all callbacks run in the angular context.
+     */
+    public connect(retry: boolean = false, changeId?: number): void {
+        if (this.websocket) {
+            return;
+        }
+        const queryParams: QueryParams = {};
+        // comment-in if changes IDs are supported on server side.
+        /*if (changeId !== undefined) {
+            queryParams.changeId = changeId.toString();
+        }*/
+
+        // Create the websocket
+        const socketProtocol = this.getWebSocketProtocol();
+        const socketServer = window.location.hostname + ':' + window.location.port;
+        const socketPath = this.getWebSocketPath(queryParams);
+        this.websocket = new WebSocket(socketProtocol + socketServer + socketPath);
+
+        // connection established. If this connect attept was a retry,
+        // The error notice will be removed and the reconnectSubject is published.
+        this.websocket.onopen = (event: Event) => {
+            this.zone.run(() => {
+                if (retry) {
+                    if (this.connectionErrorNotice) {
+                        this.connectionErrorNotice.dismiss();
+                        this.connectionErrorNotice = null;
+                    }
+                    this._reconnectEvent.emit();
+                }
+                this._connectEvent.emit();
+            });
+        };
+
+        this.websocket.onmessage = (event: MessageEvent) => {
+            this.zone.run(() => {
+                const message: WebsocketMessage = JSON.parse(event.data);
+                const type: string = message.type;
+                if (type === 'error') {
+                    console.error('Websocket error', message.content);
+                } else if (this.subjects[type]) {
+                    // Pass the content to the registered subscribers.
+                    this.subjects[type].next(message.content);
+                } else {
+                    console.log(`Got unknown websocket message type "${type}" with content`, message.content);
+                }
+            });
+        };
+
+        this.websocket.onclose = (event: CloseEvent) => {
+            this.zone.run(() => {
+                this.websocket = null;
+                if (event.code !== 1000) {
+                    // 1000 is a normal close, like the close on logout
+                    if (!this.connectionErrorNotice) {
+                        // So here we have a connection failure that wasn't intendet.
+                        this.connectionErrorNotice = this.matSnackBar.open(
+                            this.translate.instant('Offline mode: You can use OpenSlides but changes are not saved.'),
+                            '',
+                            { duration: 0 }
+                        );
+                    }
+
+                    // A random retry timeout between 2000 and 5000 ms.
+                    const timeout = Math.floor(Math.random() * 3000 + 2000);
+                    setTimeout(() => {
+                        this.connect((retry = true));
+                    }, timeout);
+                }
+            });
+        };
+    }
+
+    /**
+     * Closes the websocket connection.
+     */
+    public close(): void {
+        if (this.websocket) {
+            this.websocket.close();
+            this.websocket = null;
+        }
+    }
+
+    /**
+     * Returns an observable for messages of the given type.
+     * @param type the message type
+     */
+    public getOberservable<T>(type: string): Observable<T> {
+        if (!this.subjects[type]) {
+            this.subjects[type] = new Subject<T>();
+        }
+        return this.subjects[type].asObservable();
+    }
+
+    /**
+     * Sends a message to the server with the content and the given type.
+     *
+     * @param type the message type
+     * @param content the actual content
+     */
+    public send<T>(type: string, content: T, id?: string): void {
+        if (!this.websocket) {
+            return;
+        }
+
+        const message: WebsocketMessage = {
+            type: type,
+            content: content,
+            id: id
+        };
+
+        // create message id if not given. Required by the server.
+        if (!message.id) {
+            message.id = '';
+            const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+            for (let i = 0; i < 8; i++) {
+                message.id += possible.charAt(Math.floor(Math.random() * possible.length));
+            }
+        }
+        this.websocket.send(JSON.stringify(message));
+    }
+
+    /**
+     * Delegates to socket-path for either the side or projector websocket.
+     */
+    private getWebSocketPath(queryParams: QueryParams = {}): string {
+        // currentRoute does not end with '/'
+        const currentRoute = this.router.url;
+        let path: string;
+        if (currentRoute.includes('/projector') || currentRoute.includes('/real-projector')) {
+            path = '/ws/projector/';
+        } else {
+            path = '/ws/site/';
+        }
+
+        const keys: string[] = Object.keys(queryParams);
+        if (keys.length > 0) {
+            path += keys
+                .map(key => {
+                    return key + '=' + queryParams[key];
+                })
+                .join('&');
+        }
+        return path;
+    }
+
+    /**
+     * returns the desired websocket protocol
+     */
+    private getWebSocketProtocol(): string {
+        if (location.protocol === 'https') {
+            return 'wss://';
+        } else {
+            return 'ws://';
+        }
+    }
+}

client/src/app/openslides.component.ts

@@ -0,0 +1,27 @@
+import { Observable, of } from 'rxjs';
+
+/**
+ * injects the {@link DataStoreService} to all its children and provides a generic function to catch errors
+ * should be abstract and a mere parent to all {@link DataStoreService} accessors
+ */
+export abstract class OpenSlidesComponent {
+    /**
+     * Empty constructor
+     *
+     * Static injection of {@link DataStoreService} in all child instances of OpenSlidesComponent
+     * Throws a warning even tho it is the new syntax. Ignored for now.
+     */
+    public constructor() {}
+
+    /**
+     * Generic error handling for everything that makes HTTP Calls
+     * TODO: could have more features
+     * @return an observable error
+     */
+    public handleError<T>(): (error: any) => Observable<T> {
+        return (error: any): Observable<T> => {
+            console.error(error);
+            return of(error);
+        };
+    }
+}

client/src/app/projector-container/projector-container.component.html

@@ -0,0 +1,4 @@
+<p>
+  projector-container works!
+  Here an iframe with the real-projector is needed
+</p>

client/src/app/projector-container/projector-container.component.spec.ts

@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ProjectorContainerComponent } from './projector-container.component';
+
+describe('ProjectorContainerComponent', () => {
+    let component: ProjectorContainerComponent;
+    let fixture: ComponentFixture<ProjectorContainerComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            declarations: [ProjectorContainerComponent]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(ProjectorContainerComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/projector-container/projector-container.component.ts

@@ -0,0 +1,12 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+    selector: 'os-projector-container',
+    templateUrl: './projector-container.component.html',
+    styleUrls: ['./projector-container.component.css']
+})
+export class ProjectorContainerComponent implements OnInit {
+    public constructor() {}
+
+    public ngOnInit(): void {}
+}

client/src/app/projector-container/projector-container.module.spec.ts

@@ -0,0 +1,13 @@
+import { ProjectorContainerModule } from './projector-container.module';
+
+describe('ProjectorContainerModule', () => {
+    let projectorContainerModule: ProjectorContainerModule;
+
+    beforeEach(() => {
+        projectorContainerModule = new ProjectorContainerModule();
+    });
+
+    it('should create an instance', () => {
+        expect(projectorContainerModule).toBeTruthy();
+    });
+});

client/src/app/projector-container/projector-container.module.ts

@@ -0,0 +1,13 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+
+import { ProjectorContainerComponent } from './projector-container.component';
+import { SharedModule } from 'app/shared/shared.module';
+import { ProjectorComponent } from './projector/projector.component';
+import { ProjectorContainerRoutingModule } from './projector/projector-container.routing.module';
+
+@NgModule({
+    imports: [CommonModule, ProjectorContainerRoutingModule, SharedModule],
+    declarations: [ProjectorContainerComponent, ProjectorComponent]
+})
+export class ProjectorContainerModule {}

client/src/app/projector-container/projector/projector-container.routing.module.ts

@@ -0,0 +1,15 @@
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+import { ProjectorContainerComponent } from '../projector-container.component';
+import { ProjectorComponent } from './projector.component';
+
+const routes: Routes = [
+    { path: '', component: ProjectorContainerComponent },
+    { path: 'real', component: ProjectorComponent }
+];
+
+@NgModule({
+    imports: [RouterModule.forChild(routes)],
+    exports: [RouterModule]
+})
+export class ProjectorContainerRoutingModule {}

client/src/app/projector-container/projector/projector.component.html

@@ -0,0 +1,3 @@
+<p>
+  projector works!
+</p>

client/src/app/projector-container/projector/projector.component.spec.ts

@@ -0,0 +1,26 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ProjectorComponent } from './projector.component';
+import { E2EImportsModule } from '../../../e2e-imports.module';
+
+describe('ProjectorComponent', () => {
+    let component: ProjectorComponent;
+    let fixture: ComponentFixture<ProjectorComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            declarations: [ProjectorComponent]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(ProjectorComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/projector-container/projector/projector.component.ts

@@ -0,0 +1,19 @@
+import { Component, OnInit } from '@angular/core';
+import { BaseComponent } from 'app/base.component';
+import { Title } from '@angular/platform-browser';
+import { TranslateService } from '@ngx-translate/core';
+
+@Component({
+    selector: 'os-projector',
+    templateUrl: './projector.component.html',
+    styleUrls: ['./projector.component.css']
+})
+export class ProjectorComponent extends BaseComponent implements OnInit {
+    public constructor(titleService: Title, translate: TranslateService) {
+        super(titleService, translate);
+    }
+
+    public ngOnInit(): void {
+        super.setTitle('Projector');
+    }
+}

client/src/app/shared/animations.ts

@@ -0,0 +1,116 @@
+import { trigger, animate, transition, style, query, stagger, group } from '@angular/animations';
+
+export const pageTransition = trigger('pageTransition', [
+    transition('* => *', [
+        /** this will avoid the dom-copy-effect */
+        query(':enter, :leave', style({ position: 'absolute', width: '100%' }), { optional: true }),
+        /** keep the dom clean - let all items "just" enter */
+        query(':enter mat-card', [style({ opacity: 0 })], { optional: true }),
+        query(':enter .on-transition-fade', [style({ opacity: 0 })], { optional: true }),
+        query(':enter mat-row', [style({ opacity: 0 })], { optional: true }),
+        query(':enter mat-expansion-panel', [style({ opacity: 0 })], { optional: true }),
+
+        /** parallel vanishing */
+        group([
+            /** animate fade out for the selected components */
+            query(
+                ':leave .on-transition-fade',
+                [
+                    style({ opacity: 1 }),
+                    animate(
+                        '200ms ease-in-out',
+                        style({
+                            transform: 'translateY(0%)',
+                            opacity: 0
+                        })
+                    )
+                ],
+                { optional: true }
+            ),
+            /** how the material cards are leaving */
+            query(
+                ':leave mat-card',
+                [
+                    style({ transform: 'translateY(0%)', opacity: 1 }),
+                    animate(
+                        '200ms ease-in-out',
+                        style({
+                            transform: 'translateY(0%)',
+                            opacity: 0
+                        })
+                    )
+                ],
+                { optional: true }
+            ),
+            query(
+                ':leave mat-row',
+                [
+                    style({ transform: 'translateY(0%)', opacity: 1 }),
+                    animate(
+                        '200ms ease-in-out',
+                        style({
+                            transform: 'translateY(0%)',
+                            opacity: 0
+                        })
+                    )
+                ],
+                { optional: true }
+            ),
+            query(
+                ':leave mat-expansion-panel',
+                [
+                    style({ transform: 'translateY(0%)', opacity: 1 }),
+                    animate(
+                        '200ms ease-in-out',
+                        style({
+                            transform: 'translateY(0%)',
+                            opacity: 0
+                        })
+                    )
+                ],
+                { optional: true }
+            )
+        ]),
+
+        /** parallel appearing */
+        group([
+            /** animate fade in for the selected components */
+            query(':enter .on-transition-fade', [style({ opacity: 0 }), animate('0.2s', style({ opacity: 1 }))], {
+                optional: true
+            }),
+            /** how the mat cards enters the scene */
+            query(
+                ':enter mat-card',
+                /** stagger = "one after another" with a distance of 50ms" */
+                stagger(50, [
+                    style({ transform: 'translateY(50px)' }),
+                    animate('300ms ease-in-out', style({ transform: 'translateY(0px)', opacity: 1 }))
+                ]),
+                { optional: true }
+            ),
+            query(
+                ':enter mat-row',
+                /** stagger = "one after another" with a distance of 50ms" */
+                stagger(30, [
+                    style({ transform: 'translateY(24px)' }),
+                    animate('200ms ease-in-out', style({ transform: 'translateY(0px)', opacity: 1 }))
+                ]),
+                { optional: true }
+            ),
+            query(
+                ':enter mat-expansion-panel',
+                /** stagger = "one after another" with a distance of 50ms" */
+                stagger(100, [
+                    style({ transform: 'translateY(50px)' }),
+                    animate('300ms ease-in-out', style({ transform: 'translateY(0px)', opacity: 1 }))
+                ]),
+                { optional: true }
+            )
+        ])
+    ])
+]);
+
+export const navItemAnim = trigger('navItemAnim', [
+    transition(':enter', [style({ transform: 'translateX(-100%)' }), animate('500ms ease')]),
+    transition(':leave', [style({ transform: 'translateX(100%)' }), animate('500ms ease')])
+]);

client/src/app/shared/components/footer/footer.component.html

@@ -0,0 +1,12 @@
+<mat-toolbar color='primary' class="footer">
+    <mat-toolbar-row>
+        <button mat-button class="footer-link" [routerLink]=legalNoticeUrl>
+            <span translate>Legal Notice</span>
+        </button>
+        <button mat-button class="footer-link" [routerLink]=privacyPolicyUrl>
+            <span translate>Privacy Policy</span>
+        </button>
+        <span class="footer-right">© <span translate>Copyright by</span>&#160;<a href='https://openslides.org/'>OpenSlides</a>
+        </span>
+    </mat-toolbar-row>
+</mat-toolbar>

client/src/app/shared/components/footer/footer.component.scss

@@ -0,0 +1,11 @@
+.footer-link,
+.footer-right {
+    font-size: 12px;
+    z-index: inherit;
+}
+
+.footer-right {
+    a {
+        color: white;
+    }
+}

client/src/app/shared/components/footer/footer.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { FooterComponent } from './footer.component';
+import { E2EImportsModule } from '../../../../e2e-imports.module';
+
+describe('FooterComponent', () => {
+    let component: FooterComponent;
+    let fixture: ComponentFixture<FooterComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(FooterComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/shared/components/footer/footer.component.ts

@@ -0,0 +1,47 @@
+import { Component, OnInit } from '@angular/core';
+import { ActivatedRoute } from '@angular/router';
+
+/**
+ * Reusable footer Apps.
+ *
+ * ## Examples:
+ *
+ * ### Usage of the selector:
+ *
+ * ```html
+ * <os-footer></os-footer>
+ * ```
+ */
+@Component({
+    selector: 'os-footer',
+    templateUrl: './footer.component.html',
+    styleUrls: ['./footer.component.scss']
+})
+export class FooterComponent implements OnInit {
+    /**
+     * Indicates to location of the legal notice
+     */
+    public legalNoticeUrl = '/legalnotice';
+
+    /**
+     * Indicated the location of the privacy policy
+     */
+    public privacyPolicyUrl = '/privacypolicy';
+
+    /**
+     * Empty constructor
+     */
+    public constructor(private route: ActivatedRoute) {}
+
+    /**
+     * If on login page, redirect the legal notice and privacy policy not to /URL
+     * but to /login/URL
+     */
+
+    public ngOnInit(): void {
+        if (this.route.snapshot.url[0] && this.route.snapshot.url[0].path === 'login') {
+            this.legalNoticeUrl = '/login/legalnotice';
+            this.privacyPolicyUrl = '/login/privacypolicy';
+        }
+    }
+}

client/src/app/shared/components/head-bar/head-bar.component.html

@@ -0,0 +1,27 @@
+<mat-toolbar color='primary'>
+    <button *ngIf="plusButton" class='head-button on-transition-fade' (click)=clickPlusButton()
+        mat-fab>
+        <mat-icon>add</mat-icon>
+    </button>
+
+    <span class='app-name on-transition-fade'>
+        {{ appName | translate }}
+    </span>
+
+    <span class='spacer'></span>
+
+    <button *ngIf="menuList" class='on-transition-fade' [matMenuTriggerFor]="ellipsisMenu" mat-icon-button>
+        <mat-icon>more_vert</mat-icon>
+    </button>
+</mat-toolbar>
+
+<mat-menu #ellipsisMenu="matMenu">
+
+    <ng-container *ngFor="let item of menuList">
+
+        <button mat-menu-item *osPerms="item.perm" (click)=clickMenu(item)>
+            <mat-icon *ngIf="item.icon">{{ item.icon }}</mat-icon>
+            {{item.text | translate}}
+        </button>
+    </ng-container>
+</mat-menu>

client/src/app/shared/components/head-bar/head-bar.component.scss

@@ -0,0 +1,4 @@
+.head-button {
+    bottom: -30px;
+    z-index: 100;
+}

client/src/app/shared/components/head-bar/head-bar.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { HeadBarComponent } from './head-bar.component';
+import { E2EImportsModule } from '../../../../e2e-imports.module';
+
+describe('HeadBarComponent', () => {
+    let component: HeadBarComponent;
+    let fixture: ComponentFixture<HeadBarComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(HeadBarComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/shared/components/head-bar/head-bar.component.ts

@@ -0,0 +1,110 @@
+import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
+
+/**
+ * Reusable head bar component for Apps.
+ *
+ * Will translate the title automatically.
+ *
+ * Use `PlusButton=true` and `(plusButtonClicked)=myFunction()` if a plus button is needed
+ *
+ * Use `[menuLust]=myArray` and `(ellipsisMenuItem)=myFunction($event)` if a menu is needed
+ *
+ * ## Examples:
+ *
+ * ### Usage of the selector:
+ *
+ * ```html
+ * <os-head-bar
+ *   appName="Files"
+ *   plusButton=true
+ *   [menuList]=myMenu
+ *   (plusButtonClicked)=onPlusButton()
+ *   (ellipsisMenuItem)=onEllipsisItem($event)>
+ * </os-head-bar>
+ * ```
+ *
+ * ### Declaration of a menu provided as `[menuList]=myMenu`:
+ *
+ * ```ts
+ * myMenu = [
+ *   {
+ *     text: 'Download All',
+ *     icon: 'save_alt',
+ *     action: 'downloadAllFiles'
+ *   },
+ * ];
+ * ```
+ * The parent needs to react to `action` like the following.
+ * This will execute a function with the name provided in the
+ * `action` field.
+ * ```ts
+ * onEllipsisItem(event: any) {
+ *   if (event.action) {
+ *     this[event.action]();
+ *   }
+ * }
+ * ```
+ */
+@Component({
+    selector: 'os-head-bar',
+    templateUrl: './head-bar.component.html',
+    styleUrls: ['./head-bar.component.scss']
+})
+export class HeadBarComponent implements OnInit {
+    /**
+     * Input declaration for the app name
+     */
+    @Input()
+    public appName: string;
+
+    /**
+     * Determine if there should be a plus button.
+     */
+    @Input()
+    public plusButton: false;
+
+    /**
+     * If not empty shows a ellipsis menu on the right side
+     *
+     * The parent needs to provide a menu, i.e `[menuList]=myMenu`.
+     */
+    @Input()
+    public menuList: any[];
+
+    /**
+     * Emit a signal to the parent component if the plus button was clicked
+     */
+    @Output()
+    public plusButtonClicked = new EventEmitter<boolean>();
+
+    /**
+     * Emit a signal to the parent of an item in the menuList was selected.
+     */
+    @Output()
+    public ellipsisMenuItem = new EventEmitter<any>();
+
+    /**
+     * Empty constructor
+     */
+    public constructor() {}
+
+    /**
+     * empty onInit
+     */
+    public ngOnInit(): void {}
+
+    /**
+     * Emits a signal to the parent if an item in the menu was clicked.
+     * @param item
+     */
+    public clickMenu(item: any): void {
+        this.ellipsisMenuItem.emit(item);
+    }
+
+    /**
+     * Emits a signal to the parent if
+     */
+    public clickPlusButton(): void {
+        this.plusButtonClicked.emit(true);
+    }
+}

client/src/app/shared/components/legal-notice-content/legal-notice-content.component.html

@@ -0,0 +1,24 @@
+<mat-card class="os-card on-transition-fade">
+    <div>
+        <div class='legal-notice-text' [innerHtml]='legalNotice'></div>
+        <mat-divider></mat-divider>
+        <div *ngIf="versionInfo" class='version-text'>
+            <a [attr.href]="versionInfo.openslides_url" target="_blank">
+                OpenSlides {{ versionInfo.openslides_version }}
+            </a>
+            (<span translate>License</span>: {{ versionInfo.openslides_license }})
+
+            <div *ngIf="versionInfo.plugins.length">
+                <div translate>Installed plugins</div>:
+                <div *ngFor="let plugin of versionInfo.plugins">
+                    <a [attr.href]="plugin.url" target="_blank">
+                        {{ plugin.verbose_name }} {{ plugin.version }}
+                    </a>
+                    <div *ngIf="plugin.license">
+                        (<span translate>License</span>: {{ plugin.license }})
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</mat-card>

client/src/app/shared/components/legal-notice-content/legal-notice-content.component.scss

@@ -0,0 +1,9 @@
+.legal-notice-text {
+    display: block;
+    padding-bottom: 20px;
+}
+
+.version-text {
+    display: block;
+    padding-top: 20px;
+}

client/src/app/shared/components/legal-notice-content/legal-notice-content.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { LegalNoticeContentComponent } from './legal-notice-content.component';
+import { E2EImportsModule } from '../../../../e2e-imports.module';
+
+describe('LegalNoticeComponent', () => {
+    let component: LegalNoticeContentComponent;
+    let fixture: ComponentFixture<LegalNoticeContentComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(LegalNoticeContentComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/shared/components/legal-notice-content/legal-notice-content.component.ts

@@ -0,0 +1,106 @@
+import { Component, OnInit } from '@angular/core';
+import { TranslateService } from '@ngx-translate/core';
+import { LoginDataService } from '../../../core/services/login-data.service';
+import { environment } from 'environments/environment';
+import { HttpClient } from '@angular/common/http';
+
+/**
+ * Characterize a plugin. This data is retrieved from the server
+ */
+interface PluginDescription {
+    /**
+     * The name of the plugin
+     */
+    verbose_name: string;
+
+    /**
+     * the version
+     */
+    version: string;
+
+    /**
+     * The url to the main webpage of the plugin
+     */
+    url: string;
+
+    /**
+     * The license
+     */
+    license: string;
+}
+
+/**
+ * Represents metadata about the current installation.
+ */
+interface VersionResponse {
+    /**
+     * The lience string. Like 'MIT', 'GPLv2', ...
+     */
+    openslides_license: string;
+
+    /**
+     * The URl to the main webpage of OpenSlides.
+     */
+    openslides_url: string;
+
+    /**
+     * The current version.
+     */
+    openslides_version: string;
+
+    /**
+     * A list of installed plugins.
+     */
+    plugins: PluginDescription[];
+}
+
+/**
+ * Shared component to hold the content of the Legal Notice.
+ * Used in login and site container.
+ */
+@Component({
+    selector: 'os-legal-notice-content',
+    templateUrl: './legal-notice-content.component.html',
+    styleUrls: ['./legal-notice-content.component.scss']
+})
+export class LegalNoticeContentComponent implements OnInit {
+    /**
+     * The legal notive text for the ui.
+     */
+    public legalNotice: string;
+
+    /**
+     * Holds the version info retrieved from the server for the ui.
+     */
+    public versionInfo: VersionResponse;
+
+    /**
+     * Imports the LoginDataService, the translations and and HTTP Service
+     * @param loginDataService
+     * @param translate
+     * @param http
+     */
+    public constructor(
+        private loginDataService: LoginDataService,
+        private translate: TranslateService,
+        private http: HttpClient
+    ) {}
+
+    /**
+     * Subscribes for the legal notice text.
+     */
+    public ngOnInit(): void {
+        this.loginDataService.legal_notice.subscribe(legalNotice => {
+            if (legalNotice) {
+                this.legalNotice = this.translate.instant(legalNotice);
+            }
+        });
+
+        // Query the version info.
+        this.http
+            .get<VersionResponse>(environment.urlPrefix + '/core/version/', {})
+            .subscribe((info: VersionResponse) => {
+                this.versionInfo = info;
+            });
+    }
+}

client/src/app/shared/components/privacy-policy-content/privacy-policy-content.component.html

@@ -0,0 +1,6 @@
+<mat-card class='os-card on-transition-fade'>
+    <div *ngIf='privacyPolicy' [innerHtml]='privacyPolicy'></div>
+    <div *ngIf='!privacyPolicy' translate>
+        The event manager hasn't set up a privacy policy yet.
+    </div>
+</mat-card>

client/src/app/shared/components/privacy-policy-content/privacy-policy-content.component.scss

@@ -0,0 +1,3 @@
+mat-card {
+    height: 100%;
+}

client/src/app/shared/components/privacy-policy-content/privacy-policy-content.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { PrivacyPolicyContentComponent } from './privacy-policy-content.component';
+import { E2EImportsModule } from '../../../../e2e-imports.module';
+
+describe('PrivacyPolicyComponent', () => {
+    let component: PrivacyPolicyContentComponent;
+    let fixture: ComponentFixture<PrivacyPolicyContentComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(PrivacyPolicyContentComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();
+    });
+
+    it('should create', () => {
+        expect(component).toBeTruthy();
+    });
+});

client/src/app/shared/components/privacy-policy-content/privacy-policy-content.component.ts

@@ -0,0 +1,37 @@
+import { Component, OnInit } from '@angular/core';
+import { LoginDataService } from '../../../core/services/login-data.service';
+import { TranslateService } from '@ngx-translate/core';
+
+/**
+ * Shared component to hold the content of the Privacy Policy.
+ * Used in login and site container.
+ */
+@Component({
+    selector: 'os-privacy-policy-content',
+    templateUrl: './privacy-policy-content.component.html',
+    styleUrls: ['./privacy-policy-content.component.scss']
+})
+export class PrivacyPolicyContentComponent implements OnInit {
+    /**
+     * The actual privacy policy as string
+     */
+    public privacyPolicy: string;
+
+    /**
+     * Imports the loginDataService and the translation service
+     * @param loginDataService Login Data
+     * @param translate for the translation
+     */
+    public constructor(private loginDataService: LoginDataService, private translate: TranslateService) {}
+
+    /**
+     * Subscribes for the privacy policy text
+     */
+    public ngOnInit(): void {
+        this.loginDataService.privacy_policy.subscribe(privacyPolicy => {
+            if (privacyPolicy) {
+                this.privacyPolicy = this.translate.instant(privacyPolicy);
+            }
+        });
+    }
+}

client/src/app/shared/components/prompt-dialog/prompt-dialog.component.html

@@ -0,0 +1,6 @@
+<h2 mat-dialog-title>{{ data.title | translate }}</h2>
+<mat-dialog-content>{{ data.content | translate }}</mat-dialog-content>
+<mat-dialog-actions>
+    <button mat-button [mat-dialog-close]="true" color="warn" translate>Yes</button>
+    <button mat-button [mat-dialog-close]="false" translate>Cancel</button>
+</mat-dialog-actions>

client/src/app/shared/components/prompt-dialog/prompt-dialog.component.spec.ts

@@ -0,0 +1,26 @@
+import { async, TestBed } from '@angular/core/testing';
+
+// import { PromptDialogComponent } from './prompt-dialog.component';
+import { E2EImportsModule } from 'e2e-imports.module';
+
+describe('PromptDialogComponent', () => {
+    // let component: PromptDialogComponent;
+    // let fixture: ComponentFixture<PromptDialogComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule]
+        }).compileComponents();
+    }));
+
+    // TODO: You cannot create this component in the standard way. Needs different testing.
+    beforeEach(() => {
+        /*fixture = TestBed.createComponent(PromptDialogComponent);
+        component = fixture.componentInstance;
+        fixture.detectChanges();*/
+    });
+
+    /*it('should create', () => {
+        expect(component).toBeTruthy();
+    });*/
+});

client/src/app/shared/components/prompt-dialog/prompt-dialog.component.ts

@@ -0,0 +1,21 @@
+import { Component, Inject } from '@angular/core';
+import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material';
+
+interface PromptDialogData {
+    title: string;
+    content: string;
+}
+
+/**
+ * A simple prompt dialog. Takes a title and content.
+ */
+@Component({
+    selector: 'os-prompt-dialog',
+    templateUrl: './prompt-dialog.component.html'
+})
+export class PromptDialogComponent {
+    public constructor(
+        public dialogRef: MatDialogRef<PromptDialogComponent>,
+        @Inject(MAT_DIALOG_DATA) public data: PromptDialogData
+    ) {}
+}

client/src/app/shared/components/search-value-selector/search-value-selector.component.html

@@ -0,0 +1,22 @@
+<mat-form-field [formGroup]="form">
+    <mat-select [formControl]="formControl" [placeholder]="listname" [multiple]="multiple" #thisSelector>
+        <ngx-mat-select-search [formControl]="filterControl"></ngx-mat-select-search>
+        <div *ngIf="!multiple">
+            <mat-option [value]="null"><span translate>None</span></mat-option>
+            <mat-divider></mat-divider>
+        </div>
+        <mat-option *ngFor="let selectedItem of filteredItems | async" [value]="selectedItem.id">
+            {{selectedItem.getTitle(translate)}}
+        </mat-option>
+    </mat-select>
+</mat-form-field>
+<div *ngIf="dispSelected">
+    <p>
+        <span translate>Selected Values</span>:
+    </p>
+    <mat-chip-list #chipList>
+        <mat-chip *ngFor="let selectedItem of thisSelector?.value" (removed)="remove(selectedItem)">{{selectedItem.name}}
+            <mat-icon (click)="remove(selectedItem)">cancel</mat-icon>
+        </mat-chip>
+    </mat-chip-list>
+</div>

client/src/app/shared/components/search-value-selector/search-value-selector.component.spec.ts

@@ -0,0 +1,48 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { SearchValueSelectorComponent, Selectable } from './search-value-selector.component';
+import { E2EImportsModule } from '../../../../e2e-imports.module';
+import { ViewChild, Component } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+import { FormControl, FormBuilder } from '@angular/forms';
+
+describe('SearchValueSelectorComponent', () => {
+    @Component({
+        selector: 'os-host-component',
+        template: '<os-search-value-selector></os-search-value-selector>'
+    })
+    class TestHostComponent {
+        @ViewChild(SearchValueSelectorComponent)
+        public searchValueSelectorComponent: SearchValueSelectorComponent;
+    }
+
+    let hostComponent: TestHostComponent;
+    let hostFixture: ComponentFixture<TestHostComponent>;
+
+    beforeEach(async(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            declarations: [TestHostComponent]
+        }).compileComponents();
+    }));
+
+    beforeEach(() => {
+        hostFixture = TestBed.createComponent(TestHostComponent);
+        hostComponent = hostFixture.componentInstance;
+    });
+
+    it('should create', () => {
+        const subject: BehaviorSubject<Selectable[]> = new BehaviorSubject([]);
+        hostComponent.searchValueSelectorComponent.InputListValues = subject;
+
+        const formBuilder: FormBuilder = TestBed.get(FormBuilder);
+        const formGroup = formBuilder.group({
+            testArray: []
+        });
+        hostComponent.searchValueSelectorComponent.form = formGroup;
+        hostComponent.searchValueSelectorComponent.formControl = <FormControl>formGroup.get('testArray');
+
+        hostFixture.detectChanges();
+        expect(hostComponent.searchValueSelectorComponent).toBeTruthy();
+    });
+});