Refine the HTTP Service.

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

@@ -1,6 +1,7 @@
 import { TranslateLoader } from '@ngx-translate/core';
 import { HttpClient } from '@angular/common/http';
 import { map } from 'rxjs/operators/';
+import { Observable } from 'rxjs';
 
 /**
  * Translation loader that replaces empty strings with nothing.
@@ -28,7 +29,7 @@ export class PruningTranslationLoader implements TranslateLoader {
      * 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 {
+    public getTranslation(lang: string): Observable<any> {
         return this.http.get(`${this.prefix}${lang}${this.suffix}`).pipe(map((res: Object) => this.process(res)));
     }
 

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

@@ -1,11 +1,10 @@
 import { Injectable } from '@angular/core';
 import { BaseModel } from '../../shared/models/base/base-model';
-import { Observable } from 'rxjs';
 import { HttpService } from './http.service';
-import { HTTPMethod } from './http.service';
+import { Identifiable } from '../../shared/models/base/identifiable';
 
 /**
- * Send data back to server
+ * Send data back to server. Cares about the right REST routes.
  *
  * Contrast to dataStore service
  */
@@ -16,38 +15,47 @@ export class DataSendService {
     /**
      * Construct a DataSendService
      *
-     * @param httpService The HTTP Client
+     * @param httpService The HTTP Service
      */
     public constructor(private httpService: HttpService) {}
 
     /**
-     * Sends a post request with the model to the server.
+     * Sends a post request with the model to the server to create it.
-     * Usually for new Models
+     *
+     * @param model The model to create.
      */
-    public createModel(model: BaseModel): Observable<BaseModel> {
+    public async createModel(model: BaseModel): Promise<Identifiable> {
         const restPath = `rest/${model.collectionString}/`;
-        return this.httpService.create(restPath, model) as Observable<BaseModel>;
+        return await this.httpService.post<Identifiable>(restPath, model);
     }
 
     /**
-     * Function to change a model on the server.
+     * Function to fully update a model on the server.
      *
-     * @param model the base model that is meant to be changed
+     * @param model The model that is meant to be changed.
-     * @param method the required http method. might be put or patch
      */
-    public updateModel(model: BaseModel, method: HTTPMethod): Observable<BaseModel> {
+    public async updateModel(model: BaseModel): Promise<void> {
-        const restPath = `rest/${model.collectionString}/${model.id}`;
+        const restPath = `rest/${model.collectionString}/${model.id}/`;
-        return this.httpService.update(restPath, model, method) as Observable<BaseModel>;
+        await this.httpService.put(restPath, model);
     }
 
     /**
-     * Deletes the given model on the server
+     * Updates a model partially on the server.
      *
-     * @param model the BaseModel that shall be removed
+     * @param model The model to partially update.
-     * @return Observable of BaseModel
      */
-    public deleteModel(model: BaseModel): Observable<BaseModel> {
+    public async partialUpdateModel(model: BaseModel): Promise<void> {
-        const restPath = `rest/${model.collectionString}/${model.id}`;
+        const restPath = `rest/${model.collectionString}/${model.id}/`;
-        return this.httpService.delete(restPath) as Observable<BaseModel>;
+        await this.httpService.patch(restPath, model);
+    }
+
+    /**
+     * Deletes the given model on the server.
+     *
+     * @param model the model that shall be deleted.
+     */
+    public async deleteModel(model: BaseModel): Promise<void> {
+        const restPath = `rest/${model.collectionString}/${model.id}/`;
+        await this.httpService.delete(restPath);
     }
 }

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

@@ -1,105 +1,92 @@
 import { Injectable } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
-import { Observable } from 'rxjs';
-import { tap } from 'rxjs/operators';
 
 /**
  * Enum for different HTTPMethods
  */
 export enum HTTPMethod {
-    PUT,
+    GET = 'get',
-    PATCH
+    POST = 'post',
+    PUT = 'put',
+    PATCH = 'patch',
+    DELETE = 'delete'
 }
 
+/**
+ * Service for managing HTTP requests. Allows to send data for every method. Also (TODO) will do generic error handling.
+ */
 @Injectable({
     providedIn: 'root'
 })
-/**
+
- * Service for sending data back to server
- */
 export class HttpService {
     /**
-     * Construct a DataSendService
+     * Construct a HttpService
      *
      * @param http The HTTP Client
      */
     public constructor(private http: HttpClient) {}
 
-    /**
+    private async send<T>(url: string, method: HTTPMethod, data?: any): Promise<T> {
-     * Exectures a post on a url with a certain object
+        if (!url.endsWith('/')) {
-     * @param url string of the url to send semothing to
+            url += '/';
-     * @param obj the object that should be send
+        }
-     */
-    public create(url: string, obj: object): Observable<object> {
-        url = this.formatForSlash(url);
-        return this.http.post<object>(url, obj).pipe(
-            tap(
-                response => {
-                    // TODO: Message, Notify, Etc
-                    console.log('New object added. Response :\n ', response);
-                },
-                error => console.error('Error:\n ', error)
-            )
-        );
-    }
 
-    /**
+        const options = {
-     * Adds a / at the end, if there is none
+            body: data,
-     * @param str the string where the / should be checked
+        };
-     */
-    private formatForSlash(str: string): string {
-        let retStr = '';
-        retStr += str;
-        return retStr.endsWith('/') ? retStr : (retStr += '/');
-    }
 
-    /**
+        try {
-     * Save object in the server
+            const response = await this.http.request<T>(method, url, options).toPromise();
-     *
+            return response;
-     * @param url string of the url to send semothing to
+        } catch (e) {
-     * @param obj the object that should be send
+            console.log("error", e);
-     * @param method the HTTP Method that should be used {@link HTTPMethod}
+            throw e;
-     * @return Observable from object
-     */
-    public update(url: string, obj: object, method?: HTTPMethod): Observable<object> {
-        url = this.formatForSlash(url);
-        if (method === null || method === HTTPMethod.PATCH) {
-            return this.http.patch<object>(url, obj).pipe(
-                tap(
-                    response => {
-                        console.log('Update object. Response :\n ', response);
-                    },
-                    error => console.log('Error:\n ', error)
-                )
-            );
-        } else if (method === HTTPMethod.PUT) {
-            return this.http.put<object>(url, obj).pipe(
-                tap(
-                    response => {
-                        console.log('Update object. Response :\n ', response);
-                    },
-                    error => console.error('Error :\n', error)
-                )
-            );
         }
     }
 
     /**
-     * Deletes the given object on the server
+     * Exectures a get on a url with a certain object
-     *
+     * @param url The url to send the request to.
-     * @param url the url that should be called to delete the object
+     * @param data An optional payload for the request.
-     * @return Observable of object
      */
-    public delete(url: string): Observable<object> {
+    public async get<T>(url: string, data?: any): Promise<T> {
-        url = this.formatForSlash(url);
+        return await this.send<T>(url, HTTPMethod.GET, data);
-        return this.http.delete<object>(url).pipe(
+    }
-            tap(
+
-                response => {
+    /**
-                    // TODO: Message, Notify, Etc
+     * Exectures a post on a url with a certain object
-                    console.log('Delete object. Response:\n', response);
+     * @param url string of the url to send semothing to
-                },
+     * @param data The data to send
-                error => console.error('Error: \n', error)
+     */
-            )
+    public async post<T>(url: string, data: any): Promise<T> {
-        );
+        return await this.send<T>(url, HTTPMethod.POST, data);
+    }
+
+    /**
+     * Exectures a put on a url with a certain object
+     * @param url string of the url to send semothing to
+     * @param data the object that should be send
+     */
+    public async patch<T>(url: string, data: any): Promise<T> {
+        return await this.send<T>(url, HTTPMethod.PATCH, data);
+    }
+
+    /**
+     * Exectures a put on a url with a certain object
+     * @param url the url that should be called
+     * @param data: The data to send
+     */
+    public async put<T>(url: string, data: any): Promise<T> {
+        return await this.send<T>(url, HTTPMethod.PUT, data);
+    }
+
+    /**
+     * Makes a delete request.
+     * @param url the url that should be called
+     * @param data An optional data to send in the requestbody.
+     */
+    public async delete<T>(url: string, data?: any): Promise<T> {
+        return await this.send<T>(url, HTTPMethod.DELETE, data);
     }
 }

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

@@ -2,7 +2,7 @@ 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';
+import { HttpService } from '../../../core/services/http.service';
 
 /**
  * Characterize a plugin. This data is retrieved from the server
@@ -83,7 +83,7 @@ export class LegalNoticeContentComponent implements OnInit {
     public constructor(
         private loginDataService: LoginDataService,
         private translate: TranslateService,
-        private http: HttpClient
+        private http: HttpService
     ) {}
 
     /**
@@ -97,10 +97,13 @@ export class LegalNoticeContentComponent implements OnInit {
         });
 
         // Query the version info.
-        this.http
+        this.http.get<VersionResponse>(environment.urlPrefix + '/core/version/', {}).then(
-            .get<VersionResponse>(environment.urlPrefix + '/core/version/', {})
+            info => {
-            .subscribe((info: VersionResponse) => {
                 this.versionInfo = info;
-            });
+            },
+            () => {
+                // TODO: error handling if the version info could not be loaded
+            }
+        );
     }
 }

client/src/app/site/agenda/services/agenda-repository.service.ts

@@ -1,5 +1,4 @@
 import { Injectable } from '@angular/core';
-import { Observable } from 'rxjs';
 
 import { BaseRepository } from '../../base/base-repository';
 import { DataStoreService } from '../../../core/services/data-store.service';
@@ -7,6 +6,7 @@ import { Item } from '../../../shared/models/agenda/item';
 import { ViewItem } from '../models/view-item';
 import { AgendaBaseModel } from '../../../shared/models/base/agenda-base-model';
 import { BaseModel } from '../../../shared/models/base/base-model';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository service for users
@@ -49,7 +49,7 @@ export class AgendaRepositoryService extends BaseRepository<ViewItem, Item> {
      *
      * TODO: used over not-yet-existing detail view
      */
-    public update(item: Partial<Item>, viewUser: ViewItem): Observable<Item> {
+    public async update(item: Partial<Item>, viewUser: ViewItem): Promise<void> {
         return null;
     }
 
@@ -58,7 +58,7 @@ export class AgendaRepositoryService extends BaseRepository<ViewItem, Item> {
      *
      * TODO: used over not-yet-existing detail view
      */
-    public delete(item: ViewItem): Observable<Item> {
+    public async delete(item: ViewItem): Promise<void> {
         return null;
     }
 
@@ -67,7 +67,7 @@ export class AgendaRepositoryService extends BaseRepository<ViewItem, Item> {
      *
      * TODO: used over not-yet-existing detail view
      */
-    public create(item: Item): Observable<Item> {
+    public async create(item: Item): Promise<Identifiable> {
         return null;
     }
 

client/src/app/site/assignments/services/assignment-repository.service.ts

@@ -4,9 +4,9 @@ import { Assignment } from '../../../shared/models/assignments/assignment';
 import { User } from '../../../shared/models/users/user';
 import { Tag } from '../../../shared/models/core/tag';
 import { Item } from '../../../shared/models/agenda/item';
-import { Observable } from 'rxjs';
 import { BaseRepository } from '../../base/base-repository';
 import { DataStoreService } from '../../../core/services/data-store.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Service for Assignments.
@@ -25,15 +25,15 @@ export class AssignmentRepositoryService extends BaseRepository<ViewAssignment,
         super(DS, Assignment, [User, Item, Tag]);
     }
 
-    public update(assignment: Partial<Assignment>, viewAssignment: ViewAssignment): Observable<Assignment> {
+    public async update(assignment: Partial<Assignment>, viewAssignment: ViewAssignment): Promise<void> {
         return null;
     }
 
-    public delete(viewAssignment: ViewAssignment): Observable<Assignment> {
+    public async delete(viewAssignment: ViewAssignment): Promise<void> {
         return null;
     }
 
-    public create(assignment: Assignment): Observable<Assignment> {
+    public async create(assignment: Assignment): Promise<Identifiable> {
         return null;
     }
 

client/src/app/site/base/base-repository.ts

@@ -4,6 +4,7 @@ import { BaseViewModel } from './base-view-model';
 import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
 import { CollectionStringModelMapperService } from '../../core/services/collectionStringModelMapper.service';
 import { DataStoreService } from '../../core/services/data-store.service';
+import { Identifiable } from '../../shared/models/base/identifiable';
 
 export abstract class BaseRepository<V extends BaseViewModel, M extends BaseModel> extends OpenSlidesComponent {
     /**
@@ -78,14 +79,14 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
      * @param update the update that should be created
      * @param viewModel the view model that the update is based on
      */
-    public abstract update(update: Partial<M>, viewModel: V): Observable<M>;
+    public abstract async update(update: Partial<M>, viewModel: V): Promise<void>;
 
     /**
      * Deletes a given Model
      * @param update the update that should be created
      * @param viewModel the view model that the update is based on
      */
-    public abstract delete(viewModel: V): Observable<M>;
+    public abstract async delete(viewModel: V): Promise<void>;
 
     /**
      * Creates a new model
@@ -93,7 +94,7 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
      * @param viewModel the view model that the update is based on
      * TODO: remove the viewModel
      */
-    public abstract create(update: M): Observable<M>;
+    public abstract async create(update: M): Promise<Identifiable>;
 
     /**
      * Creates a view model out of a base model.

client/src/app/site/config/components/config-field/config-field.component.ts

@@ -5,7 +5,6 @@ import { ViewConfig } from '../../models/view-config';
 import { BaseComponent } from '../../../../base.component';
 import { FormGroup, FormBuilder } from '@angular/forms';
 import { ConfigRepositoryService } from '../../services/config-repository.service';
-import { tap } from 'rxjs/operators';
 import { ParentErrorStateMatcher } from '../../../../shared/parent-error-state-matcher';
 
 /**
@@ -117,26 +116,19 @@ export class ConfigFieldComponent extends BaseComponent implements OnInit {
     /**
      * Updates the this config field.
      */
-    private update(value: any): void {
+    private async update(value: any): Promise<void> {
         // TODO: Fix the Datetimepicker parser and formatter.
         if (this.configItem.inputType === 'datetimepicker') {
             value = Date.parse(value);
         }
         this.debounceTimeout = null;
-        this.repo
+        try {
-            .update({ value: value }, this.configItem)
+            await this.repo.update({ value: value }, this.configItem);
-            .pipe(
+            this.error = null;
-                tap(
+            this.showSuccessIcon();
-                    response => {
+        } catch (e) {
-                        this.error = null;
+            this.setError(e.error.detail);
-                        this.showSuccessIcon();
+        }
-                    },
-                    error => {
-                        this.setError(error.error.detail);
-                    }
-                )
-            )
-            .subscribe();
     }
 
     /**

client/src/app/site/config/services/config-repository.service.ts

@@ -6,7 +6,8 @@ import { Config } from '../../../shared/models/core/config';
 import { Observable, BehaviorSubject } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { ConstantsService } from '../../../core/services/constants.service';
-import { HttpClient } from '@angular/common/http';
+import { HttpService } from '../../../core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Holds a single config item.
@@ -85,7 +86,7 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
     /**
      * Constructor for ConfigRepositoryService. Requests the constants from the server and creates the config group structure.
      */
-    public constructor(DS: DataStoreService, private constantsService: ConstantsService, private http: HttpClient) {
+    public constructor(DS: DataStoreService, private constantsService: ConstantsService, private http: HttpService) {
         super(DS, Config);
 
         this.constantsService.get('OpenSlidesConfigVariables').subscribe(constant => {
@@ -180,12 +181,12 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
     /**
      * Saves a config value.
      */
-    public update(config: Partial<Config>, viewConfig: ViewConfig): Observable<Config> {
+    public async update(config: Partial<Config>, viewConfig: ViewConfig): Promise<void> {
         const updatedConfig = new Config();
         updatedConfig.patchValues(viewConfig.config);
         updatedConfig.patchValues(config);
         // TODO: Use datasendService, if it can switch correctly between put, post and patch
-        return this.http.put<Config>(
+        await this.http.put(
             'rest/' + updatedConfig.collectionString + '/' + updatedConfig.key + '/',
             updatedConfig
         );
@@ -197,7 +198,7 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
      *
      * Function exists solely to correctly implement {@link BaseRepository}
      */
-    public delete(config: ViewConfig): Observable<Config> {
+    public async delete(config: ViewConfig): Promise<void> {
         throw new Error('Config variables cannot be deleted');
     }
 
@@ -207,7 +208,7 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
      *
      * Function exists solely to correctly implement {@link BaseRepository}
      */
-    public create(config: Config): Observable<Config> {
+    public async create(config: Config): Promise<Identifiable> {
         throw new Error('Config variables cannot be created');
     }
 

client/src/app/site/login/components/login-mask/login-mask.component.ts

@@ -7,11 +7,12 @@ import { OperatorService } from 'app/core/services/operator.service';
 import { MatSnackBar, MatSnackBarRef, SimpleSnackBar } from '@angular/material';
 import { FormGroup, Validators, FormBuilder } from '@angular/forms';
 import { TranslateService } from '@ngx-translate/core';
-import { HttpErrorResponse, HttpClient } from '@angular/common/http';
+import { HttpErrorResponse } from '@angular/common/http';
 import { environment } from 'environments/environment';
 import { OpenSlidesService } from '../../../../core/services/openslides.service';
 import { LoginDataService } from '../../../../core/services/login-data.service';
 import { ParentErrorStateMatcher } from '../../../../shared/parent-error-state-matcher';
+import { HttpService } from '../../../../core/services/http.service';
 
 /**
  * Login mask component.
@@ -72,7 +73,7 @@ export class LoginMaskComponent extends BaseComponent implements OnInit, OnDestr
         private operator: OperatorService,
         private router: Router,
         private formBuilder: FormBuilder,
-        private http: HttpClient,
+        private http: HttpService,
         private matSnackBar: MatSnackBar,
         private OpenSlides: OpenSlidesService,
         private loginDataService: LoginDataService
@@ -89,15 +90,20 @@ export class LoginMaskComponent extends BaseComponent implements OnInit, OnDestr
      */
     public ngOnInit(): void {
         // Get the login data. Save information to the login data service
-        this.http.get<any>(environment.urlPrefix + '/users/login/', {}).subscribe(response => {
+        this.http.get<any>(environment.urlPrefix + '/users/login/').then(
-            if (response.info_text) {
+            response => {
-                this.installationNotice = this.matSnackBar.open(response.info_text, this.translate.instant('OK'), {
+                if (response.info_text) {
-                    duration: 5000
+                    this.installationNotice = this.matSnackBar.open(response.info_text, this.translate.instant('OK'), {
-                });
+                        duration: 5000
+                    });
+                }
+                this.loginDataService.setPrivacyPolicy(response.privacy_policy);
+                this.loginDataService.setLegalNotice(response.legal_notice);
+            },
+            () => {
+                // TODO: Error handling
             }
-            this.loginDataService.setPrivacyPolicy(response.privacy_policy);
+        );
-            this.loginDataService.setLegalNotice(response.legal_notice);
-        });
     }
 
     public ngOnDestroy(): void {

client/src/app/site/mediafiles/services/mediafile-repository.service.ts

@@ -4,8 +4,8 @@ import { BaseRepository } from '../../base/base-repository';
 import { ViewMediafile } from '../models/view-mediafile';
 import { Mediafile } from '../../../shared/models/mediafiles/mediafile';
 import { User } from '../../../shared/models/users/user';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository for files
@@ -27,7 +27,7 @@ export class MediafileRepositoryService extends BaseRepository<ViewMediafile, Me
      *
      * TODO: used over not-yet-existing detail view
      */
-    public update(file: Partial<Mediafile>, viewFile: ViewMediafile): Observable<Mediafile> {
+    public async update(file: Partial<Mediafile>, viewFile: ViewMediafile): Promise<void> {
         return null;
     }
 
@@ -36,7 +36,7 @@ export class MediafileRepositoryService extends BaseRepository<ViewMediafile, Me
      *
      * TODO: used over not-yet-existing detail view
      */
-    public delete(file: ViewMediafile): Observable<Mediafile> {
+    public async delete(file: ViewMediafile): Promise<void> {
         return null;
     }
 
@@ -45,7 +45,7 @@ export class MediafileRepositoryService extends BaseRepository<ViewMediafile, Me
      *
      * TODO: used over not-yet-existing detail view
      */
-    public create(file: Mediafile): Observable<Mediafile> {
+    public async create(file: Mediafile): Promise<Identifiable> {
         return null;
     }
 

client/src/app/site/motions/components/category-list/category-list.component.ts

@@ -10,8 +10,6 @@ import { ViewCategory } from '../../models/view-category';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
 import { Motion } from '../../../../shared/models/motions/motion';
 import { SortingListComponent } from '../../../../shared/components/sorting-list/sorting-list.component';
-import { MotionRepositoryService } from '../../services/motion-repository.service';
-import { ViewMotion } from '../../models/view-motion';
 import { PromptService } from 'app/core/services/prompt.service';
 
 /**
@@ -66,7 +64,6 @@ export class CategoryListComponent extends BaseComponent implements OnInit {
         protected translate: TranslateService,
         private repo: CategoryRepositoryService,
         private formBuilder: FormBuilder,
-        private motionRepo: MotionRepositoryService,
         private promptService: PromptService
     ) {
         super(titleService, translate);
@@ -122,12 +119,11 @@ export class CategoryListComponent extends BaseComponent implements OnInit {
     /**
      * Creates a new category. Executed after hitting save.
      */
-    public onCreateButton(): void {
+    public async onCreateButton(): Promise<void> {
         if (this.createForm.valid) {
             this.categoryToCreate.patchValues(this.createForm.value as Category);
-            this.repo.create(this.categoryToCreate).subscribe(resp => {
+            await this.repo.create(this.categoryToCreate)
-                this.categoryToCreate = null;
+            this.categoryToCreate = null;
-            });
         }
     }
 
@@ -147,18 +143,17 @@ export class CategoryListComponent extends BaseComponent implements OnInit {
     /**
      * Saves the categories
      */
-    public onSaveButton(viewCategory: ViewCategory): void {
+    public async onSaveButton(viewCategory: ViewCategory): Promise<void> {
         if (this.updateForm.valid) {
-            this.repo.update(this.updateForm.value as Partial<Category>, viewCategory).subscribe(resp => {
+            await this.repo.update(this.updateForm.value as Partial<Category>, viewCategory);
-                this.onCancelButton();
+            this.onCancelButton();
-                this.sortDataSource();
+            this.sortDataSource();
-            });
         }
 
         // get the sorted motions
         if (this.sortSelector) {
             const manuallySortedMotions = this.sortSelector.array as Motion[];
-            this.repo.updateCategoryNumbering(viewCategory.category, manuallySortedMotions).subscribe();
+            await this.repo.updateCategoryNumbering(viewCategory.category, manuallySortedMotions);
         }
     }
 
@@ -180,18 +175,11 @@ export class CategoryListComponent extends BaseComponent implements OnInit {
     /**
      * is executed, when the delete button is pressed
      */
-    public async onDeleteButton(viewCategory: ViewCategory): Promise<any> {
+    public async onDeleteButton(viewCategory: ViewCategory): Promise<void> {
         const content = this.translate.instant('Delete') + ` ${viewCategory.name}?`;
         if (await this.promptService.open('Are you sure?', content)) {
-            const motList = this.motionsInCategory(viewCategory.category);
+            await this.repo.delete(viewCategory);
-            motList.forEach(motion => {
+            this.onCancelButton();
-                motion.category_id = null;
-                this.motionRepo.update(motion, new ViewMotion(motion));
-            });
-
-            this.repo.delete(viewCategory).subscribe(resp => {
-                this.onCancelButton();
-            });
         }
     }
 

client/src/app/site/motions/components/motion-change-recommendation/motion-change-recommendation.component.ts

@@ -109,7 +109,7 @@ export class MotionChangeRecommendationComponent {
         });
     }
 
-    public saveChangeRecommendation(): void {
+    public async saveChangeRecommendation(): Promise<void> {
         this.changeReco.updateChangeReco(
             this.contentForm.controls.diffType.value,
             this.contentForm.controls.text.value,
@@ -117,21 +117,13 @@ export class MotionChangeRecommendationComponent {
         );
 
         if (this.newReco) {
-            this.repo.createByViewModel(this.changeReco).subscribe(response => {
+            await this.repo.createByViewModel(this.changeReco);
-                if (response.id) {
+            this.dialogRef.close();
-                    this.dialogRef.close(response);
+            // @TODO Show an error message
-                } else {
-                    // @TODO Show an error message
-                }
-            });
         } else {
-            this.repo.update(this.changeReco.changeRecommendation, this.changeReco).subscribe(response => {
+            await this.repo.update(this.changeReco.changeRecommendation, this.changeReco);
-                if (response.id) {
+            this.dialogRef.close();
-                    this.dialogRef.close(response);
+            // @TODO Show an error message
-                } else {
-                    // @TODO Show an error message
-                }
-            });
         }
     }
 }

client/src/app/site/motions/components/motion-comment-section-list/motion-comment-section-list.component.ts

@@ -111,12 +111,11 @@ export class MotionCommentSectionListComponent extends BaseComponent implements
         }
     }
 
-    public create(): void {
+    public async create(): Promise<void> {
         if (this.createForm.valid) {
             this.commentSectionToCreate.patchValues(this.createForm.value as MotionCommentSection);
-            this.repo.create(this.commentSectionToCreate).subscribe(resp => {
+            await this.repo.create(this.commentSectionToCreate);
-                this.commentSectionToCreate = null;
+            this.commentSectionToCreate = null;
-            });
         }
     }
 
@@ -137,23 +136,21 @@ export class MotionCommentSectionListComponent extends BaseComponent implements
     /**
      * Saves the categories
      */
-    public onSaveButton(viewSection: ViewMotionCommentSection): void {
+    public async onSaveButton(viewSection: ViewMotionCommentSection): Promise<void> {
         if (this.updateForm.valid) {
-            this.repo.update(this.updateForm.value as Partial<MotionCommentSection>, viewSection).subscribe(resp => {
+            await this.repo.update(this.updateForm.value as Partial<MotionCommentSection>, viewSection);
-                this.openId = this.editId = null;
+            this.openId = this.editId = null;
-            });
         }
     }
 
     /**
      * is executed, when the delete button is pressed
      */
-    public async onDeleteButton(viewSection: ViewMotionCommentSection): Promise<any> {
+    public async onDeleteButton(viewSection: ViewMotionCommentSection): Promise<void> {
         const content = this.translate.instant('Delete') + ` ${viewSection.name}?`;
         if (await this.promptService.open('Are you sure?', content)) {
-            this.repo.delete(viewSection).subscribe(resp => {
+            await this.repo.delete(viewSection);
-                this.openId = this.editId = null;
+            this.openId = this.editId = null;
-            });
         }
     }
 

client/src/app/site/motions/components/motion-detail-diff/motion-detail-diff.component.ts

@@ -170,12 +170,12 @@ export class MotionDetailDiffComponent implements AfterViewInit {
      * @param {ViewChangeReco} change
      * @param {string} value
      */
-    public setAcceptanceValue(change: ViewChangeReco, value: string): void {
+    public async setAcceptanceValue(change: ViewChangeReco, value: string): Promise<void> {
         if (value === 'accepted') {
-            this.recoRepo.setAccepted(change).subscribe(); // Subscribe to trigger HTTP request
+            await this.recoRepo.setAccepted(change);
         }
         if (value === 'rejected') {
-            this.recoRepo.setRejected(change).subscribe(); // Subscribe to trigger HTTP request
+            await this.recoRepo.setRejected(change);
         }
     }
 
@@ -185,8 +185,8 @@ export class MotionDetailDiffComponent implements AfterViewInit {
      * @param {ViewChangeReco} change
      * @param {boolean} internal
      */
-    public setInternal(change: ViewChangeReco, internal: boolean): void {
+    public async setInternal(change: ViewChangeReco, internal: boolean): Promise<void> {
-        this.recoRepo.setInternal(change, internal).subscribe(); // Subscribe to trigger HTTP request
+        await this.recoRepo.setInternal(change, internal);
     }
 
     /**
@@ -196,10 +196,10 @@ export class MotionDetailDiffComponent implements AfterViewInit {
      * @param {ViewChangeReco} reco
      * @param {MouseEvent} $event
      */
-    public deleteChangeRecommendation(reco: ViewChangeReco, $event: MouseEvent): void {
+    public async deleteChangeRecommendation(reco: ViewChangeReco, $event: MouseEvent): Promise<void> {
-        this.recoRepo.delete(reco).subscribe(); // Subscribe to trigger HTTP request
         $event.stopPropagation();
         $event.preventDefault();
+        await this.recoRepo.delete(reco);
     }
 
     /**

client/src/app/site/motions/components/motion-detail/motion-detail.component.ts

@@ -264,40 +264,20 @@ export class MotionDetailComponent extends BaseComponent implements OnInit {
      *
      * TODO: state is not yet saved. Need a special "put" command. Repo should handle this.
      */
-    public saveMotion(): void {
+    public async saveMotion(): Promise<void> {
         const newMotionValues = { ...this.metaInfoForm.value, ...this.contentForm.value };
 
         const fromForm = new Motion();
         fromForm.deserialize(newMotionValues);
 
         if (this.newMotion) {
-            this.repo.create(fromForm).subscribe(response => {
+            const response = await this.repo.create(fromForm);
-                if (response.id) {
+            this.router.navigate(['./motions/' + response.id]);
-                    this.router.navigate(['./motions/' + response.id]);
-                }
-            });
         } else {
-            this.repo.update(fromForm, this.motionCopy).subscribe(response => {
+            await this.repo.update(fromForm, this.motionCopy);
-                // if the motion was successfully updated, change the edit mode.
+            // if the motion was successfully updated, change the edit mode.
-                // TODO: Show errors if there appear here
+            this.editMotion = false;
-                if (response.id) {
+            // TODO: Show errors if there appear here
-                    this.editMotion = false;
-                }
-            });
-
-            // TODO: Document and evaluate if this actually does what it is supposed to do
-            if (fromForm.category_id) {
-                const catOfFormMotion = this.categoryRepo.getCategoryByID(fromForm.category_id);
-                const motionsWithSameCat = this.categoryRepo.getMotionsOfCategory(catOfFormMotion);
-
-                if (!motionsWithSameCat.includes(fromForm)) {
-                    motionsWithSameCat.push(fromForm);
-                    this.categoryRepo.updateCategoryNumbering(
-                        this.categoryRepo.getCategoryByID(fromForm.category_id),
-                        motionsWithSameCat
-                    );
-                }
-            }
         }
     }
 
@@ -329,7 +309,7 @@ export class MotionDetailComponent extends BaseComponent implements OnInit {
      * TODO: Repo should handle
      */
     public deleteMotionButton(): void {
-        this.repo.delete(this.motion).subscribe(answer => {
+        this.repo.delete(this.motion).then(() => {
             this.router.navigate(['./motions/']);
         });
         const motList = this.categoryRepo.getMotionsOfCategory(this.motion.category);

client/src/app/site/motions/components/statute-paragraph-list/statute-paragraph-list.component.ts

@@ -85,12 +85,11 @@ export class StatuteParagraphListComponent extends BaseComponent implements OnIn
         }
     }
 
-    public create(): void {
+    public async create(): Promise<void> {
         if (this.createForm.valid) {
             this.statuteParagraphToCreate.patchValues(this.createForm.value as StatuteParagraph);
-            this.repo.create(this.statuteParagraphToCreate).subscribe(resp => {
+            await this.repo.create(this.statuteParagraphToCreate);
-                this.statuteParagraphToCreate = null;
+            this.statuteParagraphToCreate = null;
-            });
         }
     }
 
@@ -110,25 +109,21 @@ export class StatuteParagraphListComponent extends BaseComponent implements OnIn
     /**
      * Saves the statute paragrpah
      */
-    public onSaveButton(viewStatuteParagraph: ViewStatuteParagraph): void {
+    public async onSaveButton(viewStatuteParagraph: ViewStatuteParagraph): Promise<void> {
         if (this.updateForm.valid) {
-            this.repo
+            await this.repo.update(this.updateForm.value as Partial<StatuteParagraph>, viewStatuteParagraph);
-                .update(this.updateForm.value as Partial<StatuteParagraph>, viewStatuteParagraph)
+            this.openId = this.editId = null;
-                .subscribe(resp => {
-                    this.openId = this.editId = null;
-                });
         }
     }
 
     /**
      * is executed, when the delete button is pressed
      */
-    public async onDeleteButton(viewStatuteParagraph: ViewStatuteParagraph): Promise<any> {
+    public async onDeleteButton(viewStatuteParagraph: ViewStatuteParagraph): Promise<void> {
         const content = this.translate.instant('Delete') + ` ${viewStatuteParagraph.title}?`;
         if (await this.promptService.open('Are you sure?', content)) {
-            this.repo.delete(viewStatuteParagraph).subscribe(resp => {
+            await this.repo.delete(viewStatuteParagraph);
-                this.openId = this.editId = null;
+            this.openId = this.editId = null;
-            });
         }
     }
 

client/src/app/site/motions/services/category-repository.service.ts

@@ -2,12 +2,12 @@ import { Injectable } from '@angular/core';
 import { Category } from '../../../shared/models/motions/category';
 import { ViewCategory } from '../models/view-category';
 import { DataSendService } from '../../../core/services/data-send.service';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { BaseRepository } from '../../base/base-repository';
 import { Motion } from '../../../shared/models/motions/motion';
 import { CategoryNumbering } from '../models/category-numbering';
-import { HttpService, HTTPMethod } from '../../../core/services/http.service';
+import { HttpService } from '../../../core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for Categories
@@ -41,11 +41,11 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
         return new ViewCategory(category);
     }
 
-    public create(newCategory: Category): Observable<any> {
+    public async create(newCategory: Category): Promise<Identifiable> {
-        return this.dataSend.createModel(newCategory);
+        return await this.dataSend.createModel(newCategory);
     }
 
-    public update(category: Partial<Category>, viewCategory?: ViewCategory): Observable<any> {
+    public async update(category: Partial<Category>, viewCategory: ViewCategory): Promise<void> {
         let updateCategory: Category;
         if (viewCategory) {
             updateCategory = viewCategory.category;
@@ -53,12 +53,12 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
             updateCategory = new Category();
         }
         updateCategory.patchValues(category);
-        return this.dataSend.updateModel(updateCategory, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateCategory);
     }
 
-    public delete(viewCategory: ViewCategory): Observable<any> {
+    public async delete(viewCategory: ViewCategory): Promise<void> {
         const category = viewCategory.category;
-        return this.dataSend.deleteModel(category);
+        await this.dataSend.deleteModel(category);
     }
 
     /**
@@ -91,10 +91,10 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
      * @param category the category it should be updated in
      * @param motionList the list of motions on this category
      */
-    public updateCategoryNumbering(category: Category, motionList: Motion[]): Observable<object> {
+    public async updateCategoryNumbering(category: Category, motionList: Motion[]): Promise<void> {
         const categoryNumbering = new CategoryNumbering();
         categoryNumbering.setMotions(motionList);
-        return this.sentCategoryNumbering(category, categoryNumbering);
+        await this.sentCategoryNumbering(category, categoryNumbering);
     }
 
     /**
@@ -102,8 +102,8 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
      *
      * @return Observable from
      */
-    protected sentCategoryNumbering(category: Category, categoryNumbering: CategoryNumbering): Observable<object> {
+    protected async sentCategoryNumbering(category: Category, categoryNumbering: CategoryNumbering): Promise<void> {
         const collectionString = 'rest/motions/category/' + category.id + '/numbering/';
-        return this.httpService.create(collectionString, categoryNumbering);
+        await this.httpService.post(collectionString, categoryNumbering);
     }
 }

client/src/app/site/motions/services/change-recommendation-repository.service.ts

@@ -10,7 +10,7 @@ import { BaseRepository } from '../../base/base-repository';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { MotionChangeReco } from '../../../shared/models/motions/motion-change-reco';
 import { ViewChangeReco } from '../models/view-change-reco';
-import { HTTPMethod } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for change recommendations
@@ -44,8 +44,8 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      *
      * @param {MotionChangeReco} changeReco
      */
-    public create(changeReco: MotionChangeReco): Observable<MotionChangeReco> {
+    public async create(changeReco: MotionChangeReco): Promise<Identifiable> {
-        return this.dataSend.createModel(changeReco) as Observable<MotionChangeReco>;
+        return await this.dataSend.createModel(changeReco);
     }
 
     /**
@@ -53,13 +53,13 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      * change recommendation view object is returned (as an observable).
      *
      * @param {ViewChangeReco} view
+     * @deprecated Will not work with PR #3928. There will just be the id as response to create requests.
+     *  Two possibilities: Make a server change to still retrieve the created object or you have to wait for the
+     *  correct autoupdate.
      */
-    public createByViewModel(view: ViewChangeReco): Observable<ViewChangeReco> {
+    public async createByViewModel(view: ViewChangeReco): Promise<Identifiable> {
-        return this.create(view.changeRecommendation).pipe(
+        return await this.dataSend.createModel(view.changeRecommendation);
-            map((changeReco: MotionChangeReco) => {
+        // return new ViewChangeReco(cr);
-                return new ViewChangeReco(changeReco);
-            })
-        );
     }
 
     /**
@@ -78,8 +78,8 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      * to {@link DataSendService}
      * @param {ViewChangeReco} viewModel
      */
-    public delete(viewModel: ViewChangeReco): Observable<MotionChangeReco> {
+    public async delete(viewModel: ViewChangeReco): Promise<void> {
-        return this.dataSend.deleteModel(viewModel.changeRecommendation) as Observable<MotionChangeReco>;
+        await this.dataSend.deleteModel(viewModel.changeRecommendation);
     }
 
     /**
@@ -91,10 +91,10 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      * @param {Partial<MotionChangeReco>} update the form data containing the update values
      * @param {ViewChangeReco} viewModel The View Change Recommendation. If not present, a new motion will be created
      */
-    public update(update: Partial<MotionChangeReco>, viewModel: ViewChangeReco): Observable<MotionChangeReco> {
+    public async update(update: Partial<MotionChangeReco>, viewModel: ViewChangeReco): Promise<void> {
         const changeReco = viewModel.changeRecommendation;
         changeReco.patchValues(update);
-        return this.dataSend.updateModel(changeReco, HTTPMethod.PATCH) as Observable<MotionChangeReco>;
+        await this.dataSend.partialUpdateModel(changeReco);
     }
 
     /**
@@ -113,12 +113,12 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      *
      * @param {ViewChangeReco} change
      */
-    public setAccepted(change: ViewChangeReco): Observable<MotionChangeReco> {
+    public async setAccepted(change: ViewChangeReco): Promise<void> {
         const changeReco = change.changeRecommendation;
         changeReco.patchValues({
             rejected: false
         });
-        return this.dataSend.updateModel(changeReco, HTTPMethod.PATCH) as Observable<MotionChangeReco>;
+        await this.dataSend.partialUpdateModel(changeReco);
     }
 
     /**
@@ -126,12 +126,12 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      *
      * @param {ViewChangeReco} change
      */
-    public setRejected(change: ViewChangeReco): Observable<MotionChangeReco> {
+    public async setRejected(change: ViewChangeReco): Promise<void> {
         const changeReco = change.changeRecommendation;
         changeReco.patchValues({
             rejected: true
         });
-        return this.dataSend.updateModel(changeReco, HTTPMethod.PATCH) as Observable<MotionChangeReco>;
+        await this.dataSend.partialUpdateModel(changeReco);
     }
 
     /**
@@ -140,11 +140,11 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<ViewCh
      * @param {ViewChangeReco} change
      * @param {boolean} internal
      */
-    public setInternal(change: ViewChangeReco, internal: boolean): Observable<MotionChangeReco> {
+    public async setInternal(change: ViewChangeReco, internal: boolean): Promise<void> {
         const changeReco = change.changeRecommendation;
         changeReco.patchValues({
             internal: internal
         });
-        return this.dataSend.updateModel(changeReco, HTTPMethod.PATCH) as Observable<MotionChangeReco>;
+        await this.dataSend.partialUpdateModel(changeReco);
     }
 }

client/src/app/site/motions/services/motion-comment-section-repository.service.ts

@@ -1,12 +1,11 @@
 import { Injectable } from '@angular/core';
 import { DataSendService } from '../../../core/services/data-send.service';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { BaseRepository } from '../../base/base-repository';
 import { ViewMotionCommentSection } from '../models/view-motion-comment-section';
 import { MotionCommentSection } from '../../../shared/models/motions/motion-comment-section';
 import { Group } from '../../../shared/models/users/group';
-import { HTTPMethod } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for Categories
@@ -41,11 +40,11 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
         return new ViewMotionCommentSection(section, read_groups, write_groups);
     }
 
-    public create(section: MotionCommentSection): Observable<any> {
+    public async create(section: MotionCommentSection): Promise<Identifiable> {
-        return this.dataSend.createModel(section);
+        return await this.dataSend.createModel(section);
     }
 
-    public update(section: Partial<MotionCommentSection>, viewSection?: ViewMotionCommentSection): Observable<any> {
+    public async update(section: Partial<MotionCommentSection>, viewSection?: ViewMotionCommentSection): Promise<void> {
         let updateSection: MotionCommentSection;
         if (viewSection) {
             updateSection = viewSection.section;
@@ -53,10 +52,10 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
             updateSection = new MotionCommentSection();
         }
         updateSection.patchValues(section);
-        return this.dataSend.updateModel(updateSection, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateSection);
     }
 
-    public delete(viewSection: ViewMotionCommentSection): Observable<any> {
+    public async delete(viewSection: ViewMotionCommentSection): Promise<void> {
-        return this.dataSend.deleteModel(viewSection.section);
+        await this.dataSend.deleteModel(viewSection.section);
     }
 }

client/src/app/site/motions/services/motion-repository.service.ts

@@ -7,7 +7,6 @@ import { Category } from '../../../shared/models/motions/category';
 import { Workflow } from '../../../shared/models/motions/workflow';
 import { WorkflowState } from '../../../shared/models/motions/workflow-state';
 import { ChangeRecoMode, ViewMotion } from '../models/view-motion';
-import { Observable } from 'rxjs';
 import { BaseRepository } from '../../base/base-repository';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { LinenumberingService } from './linenumbering.service';
@@ -15,7 +14,7 @@ import { DiffService, LineRange, ModificationType } from './diff.service';
 import { ViewChangeReco } from '../models/view-change-reco';
 import { MotionChangeReco } from '../../../shared/models/motions/motion-change-reco';
 import { ViewUnifiedChange } from '../models/view-unified-change';
-import { HTTPMethod } from '../../../core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for motions (and potentially categories)
@@ -79,11 +78,11 @@ export class MotionRepositoryService extends BaseRepository<ViewMotion, Motion>
      * @param viewMotion The View Motion. If not present, a new motion will be created
      * TODO: Remove the viewMotion and make it actually distignuishable from save()
      */
-    public create(motion: Motion): Observable<any> {
+    public async create(motion: Motion): Promise<Identifiable> {
         if (!motion.supporters_id) {
             delete motion.supporters_id;
         }
-        return this.dataSend.createModel(motion);
+        return await this.dataSend.createModel(motion);
     }
 
     /**
@@ -95,10 +94,10 @@ export class MotionRepositoryService extends BaseRepository<ViewMotion, Motion>
      * @param update the form data containing the update values
      * @param viewMotion The View Motion. If not present, a new motion will be created
      */
-    public update(update: Partial<Motion>, viewMotion: ViewMotion): Observable<any> {
+    public async update(update: Partial<Motion>, viewMotion: ViewMotion): Promise<void> {
         const motion = viewMotion.motion;
         motion.patchValues(update);
-        return this.dataSend.updateModel(motion, HTTPMethod.PATCH);
+        await this.dataSend.partialUpdateModel(motion);
     }
 
     /**
@@ -108,8 +107,8 @@ export class MotionRepositoryService extends BaseRepository<ViewMotion, Motion>
      * to {@link DataSendService}
      * @param viewMotion
      */
-    public delete(viewMotion: ViewMotion): Observable<any> {
+    public async delete(viewMotion: ViewMotion): Promise<void> {
-        return this.dataSend.deleteModel(viewMotion.motion);
+        await this.dataSend.deleteModel(viewMotion.motion);
     }
 
     /**

client/src/app/site/motions/services/statute-paragraph-repository.service.ts

@@ -1,11 +1,10 @@
 import { Injectable } from '@angular/core';
 import { DataSendService } from '../../../core/services/data-send.service';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { BaseRepository } from '../../base/base-repository';
 import { ViewStatuteParagraph } from '../models/view-statute-paragraph';
 import { StatuteParagraph } from '../../../shared/models/motions/statute-paragraph';
-import { HTTPMethod } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for statute paragraphs
@@ -32,20 +31,20 @@ export class StatuteParagraphRepositoryService extends BaseRepository<ViewStatut
         return new ViewStatuteParagraph(statuteParagraph);
     }
 
-    public create(statuteParagraph: StatuteParagraph): Observable<any> {
+    public async create(statuteParagraph: StatuteParagraph): Promise<Identifiable> {
-        return this.dataSend.createModel(statuteParagraph);
+        return await this.dataSend.createModel(statuteParagraph);
     }
 
-    public update(
+    public async update(
         statuteParagraph: Partial<StatuteParagraph>,
         viewStatuteParagraph: ViewStatuteParagraph
-    ): Observable<any> {
+    ): Promise<void> {
         const updateParagraph = viewStatuteParagraph.statuteParagraph;
         updateParagraph.patchValues(statuteParagraph);
-        return this.dataSend.updateModel(updateParagraph, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateParagraph);
     }
 
-    public delete(viewStatuteParagraph: ViewStatuteParagraph): Observable<any> {
+    public async delete(viewStatuteParagraph: ViewStatuteParagraph): Promise<void> {
-        return this.dataSend.deleteModel(viewStatuteParagraph.statuteParagraph);
+        await this.dataSend.deleteModel(viewStatuteParagraph.statuteParagraph);
     }
 }

client/src/app/site/tags/components/tag-list/tag-list.component.spec.ts

@@ -1,7 +1,7 @@
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 
 import { TagListComponent } from './tag-list.component';
-import { E2EImportsModule } from '../../../../e2e-imports.module';
+import { E2EImportsModule } from 'e2e-imports.module';
 
 describe('TagListComponent', () => {
     let component: TagListComponent;

client/src/app/site/tags/components/tag-list/tag-list.component.ts

@@ -1,12 +1,12 @@
 import { Component, OnInit, ViewChild } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { Title } from '@angular/platform-browser';
-import { Tag } from '../../../shared/models/core/tag';
+import { Tag } from '../../../../shared/models/core/tag';
-import { ListViewBaseComponent } from '../../base/list-view-base';
+import { ListViewBaseComponent } from '../../../base/list-view-base';
-import { TagRepositoryService } from '../services/tag-repository.service';
+import { TagRepositoryService } from '../../services/tag-repository.service';
-import { ViewTag } from '../models/view-tag';
+import { ViewTag } from '../../models/view-tag';
 import { FormGroup, FormControl, Validators } from '@angular/forms';
-import { PromptService } from '../../../core/services/prompt.service';
+import { PromptService } from '../../../../core/services/prompt.service';
 
 /**
  * Listview for the complete lsit of available Tags
@@ -70,42 +70,36 @@ export class TagListComponent extends ListViewBaseComponent<ViewTag> implements
     /**
      * Saves a newly created tag.
      */
-    public submitNewTag(): void {
+    public async submitNewTag(): Promise<void> {
-        if (this.tagForm.value && this.tagForm.valid) {
+        if (!this.tagForm.value || !this.tagForm.valid) {
-            this.repo.create(this.tagForm.value).subscribe(response => {
+            return;
-                if (response) {
-                    this.tagForm.reset();
-                    this.cancelEditing();
-                }
-            });
         }
+        await this.repo.create(this.tagForm.value);
+        this.tagForm.reset();
+        this.cancelEditing();
     }
 
     /**
      * Saves an edited tag.
      */
-    public submitEditedTag(): void {
+    public async submitEditedTag(): Promise<void> {
-        if (this.tagForm.value && this.tagForm.valid) {
+        if (!this.tagForm.value || !this.tagForm.valid) {
-            const updateData = new Tag({ name: this.tagForm.value.name });
+            return;
-
-            this.repo.update(updateData, this.selectedTag).subscribe(response => {
-                if (response) {
-                    this.cancelEditing();
-                }
-            });
         }
+        const updateData = new Tag({ name: this.tagForm.value.name });
+
+        await this.repo.update(updateData, this.selectedTag);
+        this.cancelEditing();
     }
 
     /**
      * Deletes the selected Tag after a successful confirmation.
-     * @async
      */
-    public async deleteSelectedTag(): Promise<any> {
+    public async deleteSelectedTag(): Promise<void> {
         const content = this.translate.instant('Delete') + ` ${this.selectedTag.name}?`;
         if (await this.promptService.open(this.translate.instant('Are you sure?'), content)) {
-            this.repo.delete(this.selectedTag).subscribe(response => {
+            await this.repo.delete(this.selectedTag);
-                this.cancelEditing();
+            this.cancelEditing();
-            });
         }
     }
 

client/src/app/site/tags/services/tag-repository.service.ts

@@ -2,10 +2,9 @@ import { Injectable } from '@angular/core';
 import { Tag } from '../../../shared/models/core/tag';
 import { ViewTag } from '../models/view-tag';
 import { DataSendService } from '../../../core/services/data-send.service';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { BaseRepository } from '../../base/base-repository';
-import { HTTPMethod } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository Services for Tags
@@ -35,20 +34,20 @@ export class TagRepositoryService extends BaseRepository<ViewTag, Tag> {
         return new ViewTag(tag);
     }
 
-    public create(update: Tag): Observable<any> {
+    public async create(update: Tag): Promise<Identifiable> {
         const newTag = new Tag();
         newTag.patchValues(update);
-        return this.dataSend.createModel(newTag);
+        return await this.dataSend.createModel(newTag);
     }
 
-    public update(update: Partial<Tag>, viewTag: ViewTag): Observable<any> {
+    public async update(update: Partial<Tag>, viewTag: ViewTag): Promise<void> {
         const updateTag = new Tag();
         updateTag.patchValues(viewTag.tag);
         updateTag.patchValues(update);
-        return this.dataSend.updateModel(updateTag, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateTag);
     }
 
-    public delete(viewTag: ViewTag): Observable<any> {
+    public async delete(viewTag: ViewTag): Promise<void> {
-        return this.dataSend.deleteModel(viewTag.tag);
+        await this.dataSend.deleteModel(viewTag.tag);
     }
 }

client/src/app/site/tags/tag-routing.module.ts

@@ -1,6 +1,6 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
-import { TagListComponent } from './components/tag-list.component';
+import { TagListComponent } from './components/tag-list/tag-list.component';
 
 const routes: Routes = [{ path: '', component: TagListComponent }];
 

client/src/app/site/tags/tag.module.ts

@@ -3,7 +3,7 @@ import { CommonModule } from '@angular/common';
 
 import { TagRoutingModule } from './tag-routing.module';
 import { SharedModule } from '../../shared/shared.module';
-import { TagListComponent } from './components/tag-list.component';
+import { TagListComponent } from './components/tag-list/tag-list.component';
 
 @NgModule({
     imports: [CommonModule, TagRoutingModule, SharedModule],

client/src/app/site/users/components/group-list/group-list.component.ts

@@ -88,38 +88,35 @@ export class GroupListComponent extends BaseComponent implements OnInit {
      * Saves a newly created group.
      * @param form form data given by the group
      */
-    public submitNewGroup(): void {
+    public async submitNewGroup(): Promise<void> {
-        if (this.groupForm.value && this.groupForm.valid) {
+        if (!this.groupForm.value || !this.groupForm.valid) {
-            this.repo.create(this.groupForm.value).subscribe(response => {
+            return;
-                if (response) {
-                    this.groupForm.reset();
-                    this.cancelEditing();
-                }
-            });
         }
+        await this.repo.create(this.groupForm.value);
+        this.groupForm.reset();
+        this.cancelEditing();
     }
 
     /**
      * Saves an edited group.
      * @param form form data given by the group
      */
-    public submitEditedGroup(): void {
+    public async submitEditedGroup(): Promise<void> {
-        if (this.groupForm.value && this.groupForm.valid) {
+        if (!this.groupForm.value || !this.groupForm.valid) {
-            const updateData = new Group({ name: this.groupForm.value.name });
+            return;
-
-            this.repo.update(updateData, this.selectedGroup).subscribe(response => {
-                if (response) {
-                    this.cancelEditing();
-                }
-            });
         }
+        const updateData = new Group({ name: this.groupForm.value.name });
+
+        await this.repo.update(updateData, this.selectedGroup);
+        this.cancelEditing();
     }
 
     /**
      * Deletes the selected Group
      */
-    public deleteSelectedGroup(): void {
+    public async deleteSelectedGroup(): Promise<void> {
-        this.repo.delete(this.selectedGroup).subscribe(response => this.cancelEditing());
+        await this.repo.delete(this.selectedGroup)
+        this.cancelEditing();
     }
 
     /**
@@ -136,9 +133,9 @@ export class GroupListComponent extends BaseComponent implements OnInit {
      * @param group
      * @param perm
      */
-    public togglePerm(viewGroup: ViewGroup, perm: string): void {
+    public async togglePerm(viewGroup: ViewGroup, perm: string): Promise<void> {
         const updateData = new Group({ permissions: viewGroup.getAlteredPermissions(perm) });
-        this.repo.update(updateData, viewGroup).subscribe();
+        await this.repo.update(updateData, viewGroup);
     }
 
     /**

client/src/app/site/users/components/user-detail/user-detail.component.ts

@@ -253,23 +253,17 @@ export class UserDetailComponent implements OnInit {
     /**
      * Save / Submit a user
      */
-    public saveUser(): void {
+    public async saveUser(): Promise<void> {
         if (this.newUser) {
-            this.repo.create(this.personalInfoForm.value).subscribe(
+            const response = await this.repo.create(this.personalInfoForm.value);
-                response => {
+            this.newUser = false;
-                    this.newUser = false;
+            this.router.navigate([`./users/${response.id}`]);
-                    this.router.navigate([`./users/${response.id}`]);
-                },
-                error => console.error('Creation of the user failed: ', error.error)
-            );
         } else {
-            this.repo.update(this.personalInfoForm.value, this.user).subscribe(
+            // TODO (Issue #3962): We need a waiting-State, so if autoupdates come before the response,
-                response => {
+            // the user is also updated.
-                    this.setEditMode(false);
+            await this.repo.update(this.personalInfoForm.value, this.user);
-                    this.loadViewUser(response.id);
+            this.setEditMode(false);
-                },
+            this.loadViewUser(this.user.id);
-                error => console.error('Update of the user failed: ', error.error)
-            );
         }
     }
 
@@ -290,10 +284,9 @@ export class UserDetailComponent implements OnInit {
     /**
      * click on the delete user button
      */
-    public deleteUserButton(): void {
+    public async deleteUserButton(): Promise<void> {
-        this.repo.delete(this.user).subscribe(response => {
+        await this.repo.delete(this.user);
-            this.router.navigate(['./users/']);
+        this.router.navigate(['./users/']);
-        });
     }
 
     /**

client/src/app/site/users/services/group-repository.service.ts

@@ -1,5 +1,4 @@
 import { Injectable } from '@angular/core';
-import { Observable } from 'rxjs';
 
 import { ViewGroup } from '../models/view-group';
 import { BaseRepository } from '../../base/base-repository';
@@ -7,7 +6,7 @@ import { Group } from '../../../shared/models/users/group';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { DataSendService } from '../../../core/services/data-send.service';
 import { ConstantsService } from '../../../core/services/constants.service';
-import { HTTPMethod } from 'app/core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Set rules to define the shape of an app permission
@@ -109,10 +108,10 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group> {
      *
      * @param groupData form value. Usually not yet a real user
      */
-    public create(groupData: Partial<Group>): Observable<any> {
+    public async create(groupData: Partial<Group>): Promise<Identifiable> {
         const newGroup = new Group();
         newGroup.patchValues(groupData);
-        return this.dataSend.createModel(newGroup);
+        return await this.dataSend.createModel(newGroup);
     }
 
     /**
@@ -121,18 +120,18 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group> {
      * @param permission the new permission
      * @param viewGroup the selected Group
      */
-    public update(groupData: Partial<Group>, viewGroup: ViewGroup): Observable<any> {
+    public async update(groupData: Partial<Group>, viewGroup: ViewGroup): Promise<void> {
         const updateGroup = new Group();
         updateGroup.patchValues(viewGroup.group);
         updateGroup.patchValues(groupData);
-        return this.dataSend.updateModel(updateGroup, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateGroup);
     }
 
     /**
      * Deletes a given group
      */
-    public delete(viewGroup: ViewGroup): Observable<any> {
+    public async delete(viewGroup: ViewGroup): Promise<void> {
-        return this.dataSend.deleteModel(viewGroup.group);
+        await this.dataSend.deleteModel(viewGroup.group);
     }
 
     public createViewModel(group: Group): ViewGroup {

client/src/app/site/users/services/user-repository.service.ts

@@ -4,10 +4,9 @@ import { BaseRepository } from '../../base/base-repository';
 import { ViewUser } from '../models/view-user';
 import { User } from '../../../shared/models/users/user';
 import { Group } from '../../../shared/models/users/group';
-import { Observable } from 'rxjs';
 import { DataStoreService } from '../../../core/services/data-store.service';
 import { DataSendService } from '../../../core/services/data-send.service';
-import { HTTPMethod } from '../../../core/services/http.service';
+import { Identifiable } from '../../../shared/models/base/identifiable';
 
 /**
  * Repository service for users
@@ -31,7 +30,7 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
      * @param update the forms values
      * @param viewUser
      */
-    public update(update: Partial<User>, viewUser: ViewUser): Observable<any> {
+    public async update(update: Partial<User>, viewUser: ViewUser): Promise<void> {
         const updateUser = new User();
         // copy the ViewUser to avoid manipulation of parameters
         updateUser.patchValues(viewUser.user);
@@ -43,14 +42,14 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
             updateUser.username = viewUser.username;
         }
 
-        return this.dataSend.updateModel(updateUser, HTTPMethod.PUT);
+        await this.dataSend.updateModel(updateUser);
     }
 
     /**
      * Deletes a given user
      */
-    public delete(viewUser: ViewUser): Observable<any> {
+    public async delete(viewUser: ViewUser): Promise<void> {
-        return this.dataSend.deleteModel(viewUser.user);
+        await this.dataSend.deleteModel(viewUser.user);
     }
 
     /**
@@ -59,7 +58,7 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
      * TODO: used over not-yet-existing detail view
      * @param userData blank form value. Usually not yet a real user
      */
-    public create(userData: Partial<User>): Observable<any> {
+    public async create(userData: Partial<User>): Promise<Identifiable> {
         const newUser = new User();
         // collectionString of userData is still empty
         newUser.patchValues(userData);
@@ -73,7 +72,7 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
             }
         });
 
-        return this.dataSend.createModel(newUser);
+        return await this.dataSend.createModel(newUser);
     }
 
     public createViewModel(user: User): ViewUser {