Merge pull request #4285 from FinnStutzenstein/translateModelsA

translate models

client/src/app/core/repositories/agenda/item-repository.service.ts

@@ -19,6 +19,7 @@ import { BaseAgendaViewModel } from 'app/site/base/base-agenda-view-model';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { BaseViewModel } from 'app/site/base/base-view-model';
 import { ViewUser } from 'app/site/users/models/view-user';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository service for users
@@ -46,11 +47,39 @@ export class ItemRepositoryService extends BaseRepository<ViewItem, Item> {
         private httpService: HttpService,
         private config: ConfigService,
         private dataSend: DataSendService,
-        private treeService: TreeService
+        private treeService: TreeService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Item);
     }
 
+    protected setupDependencyObservation(): void {
+        this.DS.secondaryModelChangeSubject.subscribe(model => {
+            const viewModel = this.viewModelStoreService.get(model.collectionString, model.id);
+            const somethingChanged = this.getViewModelList().some(ownViewModel => {
+                return ownViewModel.updateDependencies(viewModel);
+            });
+            if (somethingChanged) {
+                this.updateAllObservables(model.id);
+            }
+        });
+    }
+
+    /**
+     * Creates the viewItem out of a given item
+     *
+     * @param item the item that should be converted to view item
+     * @returns a new view item
+     */
+    public createViewModel(item: Item): ViewItem {
+        const contentObject = this.getContentObject(item);
+        const viewItem = new ViewItem(item, contentObject);
+        viewItem.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Items' : 'Item');
+        };
+        return viewItem;
+    }
+
     /**
      * Returns the corresponding content object to a given {@link Item} as an {@link AgendaBaseViewModel}
      * Used dynamically because of heavy race conditions
@@ -216,17 +245,6 @@ export class ItemRepositoryService extends BaseRepository<ViewItem, Item> {
         throw new Error('Method not implemented.');
     }
 
-    /**
-     * Creates the viewItem out of a given item
-     *
-     * @param item the item that should be converted to view item
-     * @returns a new view item
-     */
-    public createViewModel(item: Item): ViewItem {
-        const contentObject = this.getContentObject(item);
-        return new ViewItem(item, contentObject);
-    }
-
     /**
      * Get agenda visibility from the config
      *

client/src/app/core/repositories/agenda/topic-repository.service.ts

@@ -13,6 +13,7 @@ import { CreateTopic } from 'app/site/agenda/models/create-topic';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ViewMediafile } from 'app/site/mediafiles/models/view-mediafile';
 import { ViewItem } from 'app/site/agenda/models/view-item';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository for topics
@@ -32,7 +33,8 @@ export class TopicRepositoryService extends BaseRepository<ViewTopic, Topic> {
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Topic, [Mediafile, Item]);
     }
@@ -46,7 +48,11 @@ export class TopicRepositoryService extends BaseRepository<ViewTopic, Topic> {
     public createViewModel(topic: Topic): ViewTopic {
         const attachments = this.viewModelStoreService.getMany(ViewMediafile, topic.attachments_id);
         const item = this.viewModelStoreService.get(ViewItem, topic.agenda_item_id);
-        return new ViewTopic(topic, attachments, item);
+        const viewTopic = new ViewTopic(topic, attachments, item);
+        viewTopic.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Topics' : 'Topic');
+        };
+        return viewTopic;
     }
 
     /**

client/src/app/core/repositories/assignments/assignment-repository.service.ts

@@ -12,6 +12,7 @@ import { ViewModelStoreService } from 'app/core/core-services/view-model-store.s
 import { ViewItem } from 'app/site/agenda/models/view-item';
 import { ViewUser } from 'app/site/users/models/view-user';
 import { ViewTag } from 'app/site/tags/models/view-tag';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Service for Assignments.
@@ -31,11 +32,24 @@ export class AssignmentRepositoryService extends BaseRepository<ViewAssignment,
     public constructor(
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService
+        viewModelStoreService: ViewModelStoreService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Assignment, [User, Item, Tag]);
     }
 
+    public createViewModel(assignment: Assignment): ViewAssignment {
+        const relatedUser = this.viewModelStoreService.getMany(ViewUser, assignment.candidateIds);
+        const agendaItem = this.viewModelStoreService.get(ViewItem, assignment.agenda_item_id);
+        const tags = this.viewModelStoreService.getMany(ViewTag, assignment.tags_id);
+
+        const viewAssignment = new ViewAssignment(assignment, relatedUser, agendaItem, tags);
+        viewAssignment.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Elections' : 'Election');
+        };
+        return viewAssignment;
+    }
+
     public async update(assignment: Partial<Assignment>, viewAssignment: ViewAssignment): Promise<void> {
         return null;
     }
@@ -47,12 +61,4 @@ export class AssignmentRepositoryService extends BaseRepository<ViewAssignment,
     public async create(assignment: Assignment): Promise<Identifiable> {
         return null;
     }
-
-    public createViewModel(assignment: Assignment): ViewAssignment {
-        const relatedUser = this.viewModelStoreService.getMany(ViewUser, assignment.candidateIds);
-        const agendaItem = this.viewModelStoreService.get(ViewItem, assignment.agenda_item_id);
-        const tags = this.viewModelStoreService.getMany(ViewTag, assignment.tags_id);
-
-        return new ViewAssignment(assignment, relatedUser, agendaItem, tags);
-    }
 }

client/src/app/core/repositories/base-repository.ts

@@ -78,6 +78,24 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
             }
         });
 
+        this.setupDependencyObservation();
+
+        // Watch the Observables for deleting
+        // TODO: What happens, if some related object was deleted?
+        // My quess: This must trigger an autoupdate also for this model, because some IDs changed, so the
+        // affected models will be newly created by the primaryModelChangeSubject.
+        this.DS.deletedObservable.subscribe(model => {
+            if (
+                model.collection ===
+                this.collectionStringMapperService.getCollectionStringFromModelConstructor(this.baseModelCtor)
+            ) {
+                delete this.viewModelStore[model.id];
+                this.updateAllObservables(model.id);
+            }
+        });
+    }
+
+    protected setupDependencyObservation(): void {
         if (this.depsModelCtors) {
             this.DS.secondaryModelChangeSubject.subscribe(model => {
                 const dependencyChanged: boolean = this.depsModelCtors.some(ctor => {
@@ -94,20 +112,6 @@ export abstract class BaseRepository<V extends BaseViewModel, M extends BaseMode
                 }
             });
         }
-
-        // Watch the Observables for deleting
-        // TODO: What happens, if some related object was deleted?
-        // My quess: This must trigger an autoupdate also for this model, because some IDs changed, so the
-        // affected models will be newly created by the primaryModelChangeSubject.
-        this.DS.deletedObservable.subscribe(model => {
-            if (
-                model.collection ===
-                this.collectionStringMapperService.getCollectionStringFromModelConstructor(this.baseModelCtor)
-            ) {
-                delete this.viewModelStore[model.id];
-                this.updateAllObservables(model.id);
-            }
-        });
     }
 
     /**

client/src/app/core/repositories/common/chatmessage-repository.service.ts

@@ -6,6 +6,7 @@ import { CollectionStringMapperService } from '../../core-services/collectionStr
 import { ChatMessage } from 'app/shared/models/core/chat-message';
 import { ViewChatMessage } from 'app/site/common/models/view-chatmessage';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 @Injectable({
     providedIn: 'root'
@@ -14,13 +15,18 @@ export class ChatMessageRepositoryService extends BaseRepository<ViewChatMessage
     public constructor(
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService
+        viewModelStoreService: ViewModelStoreService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, ChatMessage);
     }
 
     protected createViewModel(message: ChatMessage): ViewChatMessage {
-        return new ViewChatMessage(message);
+        const viewChatMessage = new ViewChatMessage(message);
+        viewChatMessage.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Chatmessages' : 'Chatmessage');
+        };
+        return viewChatMessage;
     }
 
     public async create(message: ChatMessage): Promise<Identifiable> {

client/src/app/core/repositories/config/config-repository.service.ts

@@ -11,6 +11,7 @@ import { Identifiable } from 'app/shared/models/base/identifiable';
 import { CollectionStringMapperService } from 'app/core/core-services/collectionStringMapper.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ViewConfig } from 'app/site/config/models/view-config';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Holds a single config item.
@@ -99,7 +100,8 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private constantsService: ConstantsService,
-        private http: HttpService
+        private http: HttpService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Config);
 
@@ -110,6 +112,18 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
         });
     }
 
+    /**
+     * Creates a new ViewConfig of a given Config object
+     * @param config
+     */
+    public createViewModel(config: Config): ViewConfig {
+        const viewConfig = new ViewConfig(config);
+        viewConfig.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Configs' : 'Config');
+        };
+        return viewConfig;
+    }
+
     /**
      * Overwritten setup. Does only care about the custom list observable and inserts changed configs into the
      * config group structure.
@@ -223,14 +237,6 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config>
         throw new Error('Config variables cannot be created');
     }
 
-    /**
-     * Creates a new ViewConfig of a given Config object
-     * @param config
-     */
-    public createViewModel(config: Config): ViewConfig {
-        return new ViewConfig(config);
-    }
-
     /**
      * initially create the config structure from the given constant.
      * @param constant

client/src/app/core/repositories/history/history-repository.service.ts

@@ -11,6 +11,7 @@ import { ViewHistory } from 'app/site/history/models/view-history';
 import { TimeTravelService } from 'app/core/core-services/time-travel.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ViewUser } from 'app/site/users/models/view-user';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository for the history.
@@ -34,11 +35,27 @@ export class HistoryRepositoryService extends BaseRepository<ViewHistory, Histor
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private httpService: HttpService,
-        private timeTravel: TimeTravelService
+        private timeTravel: TimeTravelService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, History, [User]);
     }
 
+    /**
+     * Creates a new ViewHistory objects out of a historyObject
+     *
+     * @param history the source history object
+     * @return a new ViewHistory object
+     */
+    public createViewModel(history: History): ViewHistory {
+        const user = this.viewModelStoreService.get(ViewUser, history.user_id);
+        const viewHistory = new ViewHistory(history, user);
+        viewHistory.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Histories' : 'History'); // Whats about the plural case??
+        };
+        return viewHistory;
+    }
+
     /**
      * Clients usually do not need to create a history object themselves
      * @ignore
@@ -79,17 +96,6 @@ export class HistoryRepositoryService extends BaseRepository<ViewHistory, Histor
         return null;
     }
 
-    /**
-     * Creates a new ViewHistory objects out of a historyObject
-     *
-     * @param history the source history object
-     * @return a new ViewHistory object
-     */
-    public createViewModel(history: History): ViewHistory {
-        const user = this.viewModelStoreService.get(ViewUser, history.user_id);
-        return new ViewHistory(history, user);
-    }
-
     /**
      * Get the full data on the given date and use the
      * TimeTravelService to browse the history on the

client/src/app/core/repositories/mediafiles/mediafile-repository.service.ts

@@ -12,6 +12,7 @@ import { HttpService } from 'app/core/core-services/http.service';
 import { HttpHeaders } from '@angular/common/http';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ViewUser } from 'app/site/users/models/view-user';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository for MediaFiles
@@ -32,11 +33,27 @@ export class MediafileRepositoryService extends BaseRepository<ViewMediafile, Me
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private dataSend: DataSendService,
-        private httpService: HttpService
+        private httpService: HttpService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Mediafile, [User]);
     }
 
+    /**
+     * Creates mediafile ViewModels out of given mediafile objects
+     *
+     * @param file mediafile to convert
+     * @returns a new mediafile ViewModel
+     */
+    public createViewModel(file: Mediafile): ViewMediafile {
+        const uploader = this.viewModelStoreService.get(ViewUser, file.uploader_id);
+        const viewMediafile = new ViewMediafile(file, uploader);
+        viewMediafile.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Files' : 'File');
+        };
+        return viewMediafile;
+    }
+
     /**
      * Alter a given mediaFile
      * Usually just i.e change the name and the hidden flag.
@@ -83,15 +100,4 @@ export class MediafileRepositoryService extends BaseRepository<ViewMediafile, Me
         const emptyHeader = new HttpHeaders();
         return this.httpService.post<Identifiable>(restPath, file, {}, emptyHeader);
     }
-
-    /**
-     * Creates mediafile ViewModels out of given mediafile objects
-     *
-     * @param file mediafile to convert
-     * @returns a new mediafile ViewModel
-     */
-    public createViewModel(file: Mediafile): ViewMediafile {
-        const uploader = this.viewModelStoreService.get(ViewUser, file.uploader_id);
-        return new ViewMediafile(file, uploader);
-    }
 }

client/src/app/core/repositories/motions/category-repository.service.ts

@@ -1,4 +1,5 @@
 import { Injectable } from '@angular/core';
+
 import { BehaviorSubject, Observable } from 'rxjs';
 import { TranslateService } from '@ngx-translate/core';
 
@@ -53,7 +54,11 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
     }
 
     protected createViewModel(category: Category): ViewCategory {
-        return new ViewCategory(category);
+        const viewCategory = new ViewCategory(category);
+        viewCategory.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Categories' : 'Category');
+        };
+        return viewCategory;
     }
 
     public async create(newCategory: Category): Promise<Identifiable> {

client/src/app/core/repositories/motions/change-recommendation-repository.service.ts

@@ -14,6 +14,7 @@ import { ViewMotionChangeRecommendation } from 'app/site/motions/models/view-cha
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { CollectionStringMapperService } from 'app/core/core-services/collectionStringMapper.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Services for change recommendations
@@ -46,11 +47,25 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, MotionChangeRecommendation, [Category, User, Workflow]);
     }
 
+    /**
+     * Creates this view wrapper based on an actual Change Recommendation model
+     *
+     * @param {MotionChangeRecommendation} model
+     */
+    protected createViewModel(model: MotionChangeRecommendation): ViewMotionChangeRecommendation {
+        const viewMotionChangeRecommendation = new ViewMotionChangeRecommendation(model);
+        viewMotionChangeRecommendation.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Change recommendations' : 'Change recommendation');
+        };
+        return viewMotionChangeRecommendation;
+    }
+
     /**
      * Creates a change recommendation
      * Creates a (real) change recommendation and delegates it to the {@link DataSendService}
@@ -70,15 +85,6 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
         return await this.dataSend.createModel(view.changeRecommendation);
     }
 
-    /**
-     * Creates this view wrapper based on an actual Change Recommendation model
-     *
-     * @param {MotionChangeRecommendation} model
-     */
-    protected createViewModel(model: MotionChangeRecommendation): ViewMotionChangeRecommendation {
-        return new ViewMotionChangeRecommendation(model);
-    }
-
     /**
      * Deleting a change recommendation.
      *

client/src/app/core/repositories/motions/motion-block-repository.service.ts

@@ -17,6 +17,7 @@ import { ViewMotionBlock } from 'app/site/motions/models/view-motion-block';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Item } from 'app/shared/models/agenda/item';
 import { ViewItem } from 'app/site/agenda/models/view-item';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository service for motion blocks
@@ -40,11 +41,27 @@ export class MotionBlockRepositoryService extends BaseRepository<ViewMotionBlock
         viewModelStoreService: ViewModelStoreService,
         private dataSend: DataSendService,
         private motionRepo: MotionRepositoryService,
-        private httpService: HttpService
+        private httpService: HttpService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, MotionBlock, [Item]);
     }
 
+    /**
+     * Converts a given motion block into a ViewModel
+     *
+     * @param block a motion block
+     * @returns a new ViewMotionBlock
+     */
+    protected createViewModel(block: MotionBlock): ViewMotionBlock {
+        const item = this.viewModelStoreService.get(ViewItem, block.agenda_item_id);
+        const viewMotionBlock = new ViewMotionBlock(block, item);
+        viewMotionBlock.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Motion blocks' : 'Motion block');
+        };
+        return viewMotionBlock;
+    }
+
     /**
      * Updates a given motion block
      *
@@ -77,17 +94,6 @@ export class MotionBlockRepositoryService extends BaseRepository<ViewMotionBlock
         return await this.dataSend.createModel(newBlock);
     }
 
-    /**
-     * Converts a given motion block into a ViewModel
-     *
-     * @param block a motion block
-     * @returns a new ViewMotionBlock
-     */
-    protected createViewModel(block: MotionBlock): ViewMotionBlock {
-        const item = this.viewModelStoreService.get(ViewItem, block.agenda_item_id);
-        return new ViewMotionBlock(block, item);
-    }
-
     /**
      * Removes the motion block id from the given motion
      *

client/src/app/core/repositories/motions/motion-comment-section-repository.service.ts

@@ -11,6 +11,7 @@ import { CollectionStringMapperService } from '../../core-services/collectionStr
 import { HttpService } from 'app/core/core-services/http.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ViewGroup } from 'app/site/users/models/view-group';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Services for Categories
@@ -44,7 +45,8 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private dataSend: DataSendService,
-        private http: HttpService
+        private http: HttpService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, MotionCommentSection, [Group]);
     }
@@ -58,7 +60,11 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
     protected createViewModel(section: MotionCommentSection): ViewMotionCommentSection {
         const readGroups = this.viewModelStoreService.getMany(ViewGroup, section.read_groups_id);
         const writeGroups = this.viewModelStoreService.getMany(ViewGroup, section.write_groups_id);
-        return new ViewMotionCommentSection(section, readGroups, writeGroups);
+        const viewMotionCommentSection = new ViewMotionCommentSection(section, readGroups, writeGroups);
+        viewMotionCommentSection.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Comment sections' : 'Comment section');
+        };
+        return viewMotionCommentSection;
     }
 
     /**

client/src/app/core/repositories/motions/motion-repository.service.ts

@@ -114,7 +114,7 @@ export class MotionRepositoryService extends BaseRepository<ViewMotion, Motion>
         if (workflow) {
             state = workflow.getStateById(motion.state_id);
         }
-        return new ViewMotion(
+        const viewMotion = new ViewMotion(
             motion,
             category,
             submitters,
@@ -127,6 +127,26 @@ export class MotionRepositoryService extends BaseRepository<ViewMotion, Motion>
             tags,
             parent
         );
+        viewMotion.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Motions' : 'Motion');
+        };
+        viewMotion.getAgendaTitle = () => {
+            // if the identifier is set, the title will be 'Motion <identifier>'.
+            if (viewMotion.identifier) {
+                return this.translate.instant('Motion') + ' ' + viewMotion.identifier;
+            } else {
+                return viewMotion.getTitle();
+            }
+        };
+        viewMotion.getAgendaTitleWithType = () => {
+            // Append the verbose name only, if not the special format 'Motion <identifier>' is used.
+            if (viewMotion.identifier) {
+                return this.translate.instant('Motion') + ' ' + viewMotion.identifier;
+            } else {
+                return viewMotion.getTitle() + ' (' + viewMotion.getVerboseName() + ')';
+            }
+        };
+        return viewMotion;
     }
 
     /**

client/src/app/core/repositories/motions/statute-paragraph-repository.service.ts

@@ -8,6 +8,7 @@ import { StatuteParagraph } from 'app/shared/models/motions/statute-paragraph';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { CollectionStringMapperService } from '../../core-services/collectionStringMapper.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Services for statute paragraphs
@@ -33,13 +34,18 @@ export class StatuteParagraphRepositoryService extends BaseRepository<ViewStatut
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, StatuteParagraph);
     }
 
     protected createViewModel(statuteParagraph: StatuteParagraph): ViewStatuteParagraph {
-        return new ViewStatuteParagraph(statuteParagraph);
+        const viewStatuteParagraph = new ViewStatuteParagraph(statuteParagraph);
+        viewStatuteParagraph.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Statute paragraphs' : 'Statute paragraph');
+        };
+        return viewStatuteParagraph;
     }
 
     public async create(statuteParagraph: StatuteParagraph): Promise<Identifiable> {

client/src/app/core/repositories/motions/workflow-repository.service.ts

@@ -11,6 +11,7 @@ import { WorkflowState } from 'app/shared/models/motions/workflow-state';
 import { ViewMotion } from 'app/site/motions/models/view-motion';
 import { HttpService } from 'app/core/core-services/http.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Services for Categories
@@ -45,7 +46,8 @@ export class WorkflowRepositoryService extends BaseRepository<ViewWorkflow, Work
         mapperService: CollectionStringMapperService,
         private httpService: HttpService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Workflow);
     }
@@ -56,7 +58,11 @@ export class WorkflowRepositoryService extends BaseRepository<ViewWorkflow, Work
      * @param workflow the Workflow to convert
      */
     protected createViewModel(workflow: Workflow): ViewWorkflow {
-        return new ViewWorkflow(workflow);
+        const viewWorkflow = new ViewWorkflow(workflow);
+        viewWorkflow.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Workflows' : 'Workflow');
+        };
+        return viewWorkflow;
     }
 
     /**

client/src/app/core/repositories/projector/countdown-repository.service.ts

@@ -7,6 +7,7 @@ import { CollectionStringMapperService } from '../../core-services/collectionStr
 import { ViewCountdown } from 'app/site/projector/models/view-countdown';
 import { Countdown } from 'app/shared/models/core/countdown';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 @Injectable({
     providedIn: 'root'
@@ -16,13 +17,18 @@ export class CountdownRepositoryService extends BaseRepository<ViewCountdown, Co
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Countdown);
     }
 
     protected createViewModel(countdown: Countdown): ViewCountdown {
-        return new ViewCountdown(countdown);
+        const viewCountdown = new ViewCountdown(countdown);
+        viewCountdown.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Countdowns' : 'Countdown');
+        };
+        return viewCountdown;
     }
 
     public async create(countdown: Countdown): Promise<Identifiable> {

client/src/app/core/repositories/projector/projector-repository.service.ts

@@ -9,6 +9,7 @@ import { ViewProjector } from 'app/site/projector/models/view-projector';
 import { Projector } from 'app/shared/models/core/projector';
 import { HttpService } from 'app/core/core-services/http.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Directions for scale and scroll requests.
@@ -39,11 +40,20 @@ export class ProjectorRepositoryService extends BaseRepository<ViewProjector, Pr
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private dataSend: DataSendService,
-        private http: HttpService
+        private http: HttpService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Projector);
     }
 
+    public createViewModel(projector: Projector): ViewProjector {
+        const viewProjector = new ViewProjector(projector);
+        viewProjector.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Projectors' : 'Projector');
+        };
+        return viewProjector;
+    }
+
     /**
      * Creates a new projector. Adds the clock as default, stable element
      */
@@ -73,10 +83,6 @@ export class ProjectorRepositoryService extends BaseRepository<ViewProjector, Pr
         await this.dataSend.deleteModel(projector.projector);
     }
 
-    public createViewModel(projector: Projector): ViewProjector {
-        return new ViewProjector(projector);
-    }
-
     /**
      * Scroll the given projector.
      *

client/src/app/core/repositories/projector/projectormessage-repository.service.ts

@@ -6,6 +6,7 @@ import { CollectionStringMapperService } from '../../core-services/collectionStr
 import { ProjectorMessage } from 'app/shared/models/core/projector-message';
 import { ViewProjectorMessage } from 'app/site/projector/models/view-projectormessage';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 @Injectable({
     providedIn: 'root'
@@ -14,13 +15,18 @@ export class ProjectorMessageRepositoryService extends BaseRepository<ViewProjec
     public constructor(
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService
+        viewModelStoreService: ViewModelStoreService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, ProjectorMessage);
     }
 
     protected createViewModel(message: ProjectorMessage): ViewProjectorMessage {
-        return new ViewProjectorMessage(message);
+        const viewProjectorMessage = new ViewProjectorMessage(message);
+        viewProjectorMessage.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Messages' : 'Message');
+        };
+        return viewProjectorMessage;
     }
 
     public async create(message: ProjectorMessage): Promise<Identifiable> {

client/src/app/core/repositories/tags/tag-repository.service.ts

@@ -8,6 +8,7 @@ import { BaseRepository } from '../base-repository';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { CollectionStringMapperService } from '../../core-services/collectionStringMapper.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Repository Services for Tags
@@ -36,13 +37,18 @@ export class TagRepositoryService extends BaseRepository<ViewTag, Tag> {
         protected DS: DataStoreService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        private dataSend: DataSendService
+        private dataSend: DataSendService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Tag);
     }
 
     protected createViewModel(tag: Tag): ViewTag {
-        return new ViewTag(tag);
+        const viewTag = new ViewTag(tag);
+        viewTag.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Tags' : 'Tag');
+        };
+        return viewTag;
     }
 
     public async create(update: Tag): Promise<Identifiable> {

client/src/app/core/repositories/users/group-repository.service.ts

@@ -9,6 +9,7 @@ import { Group } from 'app/shared/models/users/group';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { ViewGroup } from 'app/site/users/models/view-group';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  * Shape of a permission
@@ -52,12 +53,21 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group> {
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         private dataSend: DataSendService,
-        private constants: ConstantsService
+        private constants: ConstantsService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, Group);
         this.sortPermsPerApp();
     }
 
+    public createViewModel(group: Group): ViewGroup {
+        const viewGroup = new ViewGroup(group);
+        viewGroup.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Groups' : 'Group');
+        };
+        return viewGroup;
+    }
+
     /**
      * Add an entry to appPermissions
      *
@@ -180,8 +190,4 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group> {
     public async delete(viewGroup: ViewGroup): Promise<void> {
         await this.dataSend.deleteModel(viewGroup.group);
     }
-
-    public createViewModel(group: Group): ViewGroup {
-        return new ViewGroup(group);
-    }
 }

client/src/app/core/repositories/users/personal-note-repository.service.ts

@@ -7,6 +7,7 @@ import { PersonalNote } from 'app/shared/models/users/personal-note';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { ViewPersonalNote } from 'app/site/users/models/view-personal-note';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { TranslateService } from '@ngx-translate/core';
 
 /**
  */
@@ -21,13 +22,18 @@ export class PersonalNoteRepositoryService extends BaseRepository<ViewPersonalNo
     public constructor(
         DS: DataStoreService,
         mapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService
+        viewModelStoreService: ViewModelStoreService,
+        private translate: TranslateService
     ) {
         super(DS, mapperService, viewModelStoreService, PersonalNote);
     }
 
     protected createViewModel(personalNote: PersonalNote): ViewPersonalNote {
-        return new ViewPersonalNote();
+        const viewPersonalNote = new ViewPersonalNote();
+        viewPersonalNote.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Personal notes' : 'Personal note');
+        };
+        return viewPersonalNote;
     }
 
     public async create(personalNote: PersonalNote): Promise<Identifiable> {

client/src/app/core/repositories/users/user-repository.service.ts

@@ -49,6 +49,15 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
         super(DS, mapperService, viewModelStoreService, User, [Group]);
     }
 
+    public createViewModel(user: User): ViewUser {
+        const groups = this.viewModelStoreService.getMany(ViewGroup, user.groups_id);
+        const viewUser = new ViewUser(user, groups);
+        viewUser.getVerboseName = (plural: boolean = false) => {
+            return this.translate.instant(plural ? 'Users' : 'User');
+        };
+        return viewUser;
+    }
+
     /**
      * Updates a the selected user with the form values.
      *
@@ -106,11 +115,6 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User> {
         return await this.dataSend.createModel(newUser);
     }
 
-    public createViewModel(user: User): ViewUser {
-        const groups = this.viewModelStoreService.getMany(ViewGroup, user.groups_id);
-        return new ViewUser(user, groups);
-    }
-
     /**
      * Generates a random password
      *

client/src/app/core/ui-services/search.service.ts

@@ -82,11 +82,11 @@ export class SearchService {
         ctor: new (...args: any[]) => Searchable & BaseViewModel,
         displayOrder: number
     ): void {
-        const instance = new ctor();
+        // const instance = new ctor();
         this.searchModels.push({
             collectionString: collectionString,
-            verboseNameSingular: instance.getVerboseName(),
+            verboseNameSingular: 'TODO', // instance.getVerboseName(),
-            verboseNamePlural: instance.getVerboseName(true),
+            verboseNamePlural: 'TODO', // instance.getVerboseName(true),
             displayOrder: displayOrder
         });
         this.searchModels.sort((a, b) => a.displayOrder - b.displayOrder);

client/src/app/shared/components/empty-selectable.ts

@@ -1,6 +1,7 @@
-import { Selectable } from './selectable';
 import { TranslateService } from '@ngx-translate/core';
 
+import { Selectable } from './selectable';
+
 /**
  * Class to display an "empty" Selectable
  */
@@ -19,20 +20,10 @@ export class EmptySelectable implements Selectable {
     /**
      * gets the title
      */
-    public getTitle(): string {
+    public getTitle = () => (this.translate ? this.translate.instant('None') : 'None');
-        if (this.translate) {
-            return this.translate.instant('None');
-        }
-        return 'None';
-    }
 
     /**
      * gets the list title
      */
-    public getListTitle(): string {
+    public getListTitle = () => this.getTitle();
-        if (this.translate) {
-            return this.translate.instant('None');
-        }
-        return 'None';
-    }
 }

client/src/app/shared/components/sorting-tree/sorting-tree.component.spec.ts

@@ -17,13 +17,9 @@ class TestModel implements Identifiable, Displayable {
         public parent_id: number | null
     ) {}
 
-    public getTitle(): string {
+    public getTitle = () => this.name;
-        return this.name;
-    }
 
-    public getListTitle(): string {
+    public getListTitle = () => this.getTitle();
-        return this.getTitle();
-    }
 }
 
 describe('SortingTreeComponent', () => {

client/src/app/shared/models/agenda/item.ts

@@ -25,6 +25,8 @@ export const itemVisibilityChoices = [
  * @ignore
  */
 export class Item extends BaseModel<Item> {
+    public static COLLECTIONSTRING = 'agenda/item';
+
     public id: number;
     public item_number: string;
     public title: string;
@@ -41,7 +43,7 @@ export class Item extends BaseModel<Item> {
     public parent_id: number;
 
     public constructor(input?: any) {
-        super('agenda/item', input);
+        super(Item.COLLECTIONSTRING, input);
     }
 
     public deserialize(input: any): void {

client/src/app/shared/models/assignments/assignment.ts

@@ -13,6 +13,7 @@ export const assignmentPhase = [
  * @ignore
  */
 export class Assignment extends BaseModel<Assignment> {
+    public static COLLECTIONSTRING = 'assignments/assignment';
     public id: number;
     public title: string;
     public description: string;
@@ -25,7 +26,7 @@ export class Assignment extends BaseModel<Assignment> {
     public tags_id: number[];
 
     public constructor(input?: any) {
-        super('assignments/assignment', input);
+        super(Assignment.COLLECTIONSTRING, input);
     }
 
     public get candidateIds(): number[] {

client/src/app/shared/models/mediafiles/mediafile.ts

@@ -6,6 +6,7 @@ import { BaseModel } from '../base/base-model';
  * @ignore
  */
 export class Mediafile extends BaseModel<Mediafile> {
+    public static COLLECTIONSTRING = 'mediafiles/mediafile';
     public id: number;
     public title: string;
     public mediafile: File;
@@ -16,7 +17,7 @@ export class Mediafile extends BaseModel<Mediafile> {
     public timestamp: string;
 
     public constructor(input?: any) {
-        super('mediafiles/mediafile', input);
+        super(Mediafile.COLLECTIONSTRING, input);
     }
 
     public deserialize(input: any): void {

client/src/app/shared/models/users/group.ts

@@ -6,6 +6,7 @@ import { BaseModel } from '../base/base-model';
  */
 export class Group extends BaseModel<Group> {
     public static COLLECTIONSTRING = 'users/group';
+
     public id: number;
     public name: string;
     public permissions: string[];
@@ -17,8 +18,4 @@ export class Group extends BaseModel<Group> {
             this.permissions = [];
         }
     }
-
-    public getTitle(): string {
-        return this.name;
-    }
 }

client/src/app/shared/models/users/personal-note.ts

@@ -58,8 +58,4 @@ export class PersonalNote extends BaseModel<PersonalNote> implements PersonalNot
     public constructor(input: any) {
         super(PersonalNote.COLLECTIONSTRING, input);
     }
-
-    public getTitle(): string {
-        return 'Personal note';
-    }
 }

client/src/app/site/agenda/models/view-create-topic.ts

@@ -107,4 +107,8 @@ export class ViewCreateTopic extends ViewTopic {
     public constructor(topic: CreateTopic) {
         super(topic);
     }
+
+    public getVerboseName = () => {
+        throw new Error('This should not be used');
+    };
 }

client/src/app/site/agenda/models/view-item.ts

@@ -1,7 +1,7 @@
 import { BaseViewModel } from '../../base/base-view-model';
 import { Item } from 'app/shared/models/agenda/item';
 import { Speaker } from 'app/shared/models/agenda/speaker';
-import { BaseAgendaViewModel } from 'app/site/base/base-agenda-view-model';
+import { BaseAgendaViewModel, isAgendaBaseModel } from 'app/site/base/base-agenda-view-model';
 
 export class ViewItem extends BaseViewModel {
     private _item: Item;
@@ -29,52 +29,46 @@ export class ViewItem extends BaseViewModel {
     }
 
     public get id(): number {
-        return this.item ? this.item.id : null;
+        return this.item.id;
     }
 
     public get itemNumber(): string {
-        return this.item ? this.item.item_number : null;
+        return this.item.item_number;
     }
 
     public get duration(): number {
-        return this.item ? this.item.duration : null;
+        return this.item.duration;
     }
 
     public get waitingSpeakerAmount(): number {
-        return this.item ? this.item.waitingSpeakerAmount : null;
+        return this.item.waitingSpeakerAmount;
     }
 
     public get type(): number {
-        return this.item ? this.item.type : null;
+        return this.item.type;
     }
 
     public get closed(): boolean {
-        return this.item ? this.item.closed : null;
+        return this.item.closed;
     }
 
     public get comment(): string {
-        if (this.item && this.item.comment) {
+        return this.item.comment;
-            return this.item.comment;
-        }
-        return '';
     }
 
     public get verboseType(): string {
-        if (this.item && this.item.verboseType) {
+        return this.item.verboseType;
-            return this.item.verboseType;
-        }
-        return '';
     }
 
     public get verboseCsvType(): string {
-        return this.item ? this.item.verboseCsvType : '';
+        return this.item.verboseCsvType;
     }
 
     /**
      * TODO: make the repository set the ViewSpeakers here.
      */
     public get speakers(): Speaker[] {
-        return this.item ? this.item.speakers : [];
+        return this.item.speakers;
     }
 
     /**
@@ -82,29 +76,34 @@ export class ViewItem extends BaseViewModel {
      * it's own hierarchy level (items sharing a parent)
      */
     public get weight(): number {
-        return this.item ? this.item.weight : null;
+        return this.item.weight;
     }
 
     /**
      * @returns the parent's id of that item (0 if no parent is set).
      */
     public get parent_id(): number {
-        return this.item ? this.item.parent_id : null;
+        return this.item.parent_id;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(item: Item, contentObject: BaseAgendaViewModel) {
-        super('Item');
+        super(Item.COLLECTIONSTRING);
         this._item = item;
         this._contentObject = contentObject;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         if (this.contentObject) {
             return this.contentObject.getAgendaTitle();
         } else {
             return this.item ? this.item.title : null;
         }
-    }
+    };
 
     /**
      * Create the list view title.
@@ -112,16 +111,27 @@ export class ViewItem extends BaseViewModel {
      *
      * @returns the agenda list title as string
      */
-    public getListTitle(): string {
+    public getListTitle = () => {
-        const contentObject: BaseAgendaViewModel = this.contentObject;
         const numberPrefix = this.itemNumber ? `${this.itemNumber} · ` : '';
 
-        if (contentObject) {
+        if (this.contentObject) {
-            return numberPrefix + contentObject.getAgendaTitleWithType();
+            return numberPrefix + this.contentObject.getAgendaTitleWithType();
         } else {
-            return this.item ? numberPrefix + this.item.title_with_type : null;
+            return numberPrefix + this.item.title_with_type;
         }
-    }
+    };
 
-    public updateDependencies(update: BaseViewModel): void {}
+    public updateDependencies(update: BaseViewModel): boolean {
+        if (
+            update.collectionString === this.item.content_object.collection &&
+            update.id === this.item.content_object.id
+        ) {
+            if (!isAgendaBaseModel(update)) {
+                throw new Error('The item is not an BaseAgendaViewModel:' + update);
+            }
+            this._contentObject = update as BaseAgendaViewModel;
+            return true;
+        }
+        return false;
+    }
 }

client/src/app/site/agenda/models/view-speaker.ts

@@ -55,15 +55,20 @@ export class ViewSpeaker extends BaseViewModel {
         return this.user ? this.user.gender : '';
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(speaker: Speaker, user?: ViewUser) {
-        super('Speaker');
+        super('TODO');
         this._speaker = speaker;
         this._user = user;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     /**
      * Speaker is not a base model,

client/src/app/site/agenda/models/view-topic.ts

@@ -47,25 +47,30 @@ export class ViewTopic extends BaseAgendaViewModel {
         return this.topic.text;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(topic: Topic, attachments?: ViewMediafile[], item?: ViewItem) {
-        super('Topic');
+        super(Topic.COLLECTIONSTRING);
         this._topic = topic;
         this._attachments = attachments;
         this._agendaItem = item;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.title;
-    }
+    };
 
     public getAgendaItem(): ViewItem {
         return this.agendaItem;
     }
 
-    public getAgendaTitleWithType(): string {
+    public getAgendaTitleWithType = () => {
         // Do not append ' (Topic)' to the title.
         return this.getAgendaTitle();
-    }
+    };
 
     /**
      * Formats the category for search

client/src/app/site/assignments/models/view-assignment.ts

@@ -44,8 +44,13 @@ export class ViewAssignment extends BaseAgendaViewModel {
         return this.candidates ? this.candidates.length : 0;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(assignment: Assignment, relatedUser?: ViewUser[], agendaItem?: ViewItem, tags?: ViewTag[]) {
-        super('Election');
+        super(Assignment.COLLECTIONSTRING);
         this._assignment = assignment;
         this._relatedUser = relatedUser;
         this._agendaItem = agendaItem;
@@ -60,9 +65,9 @@ export class ViewAssignment extends BaseAgendaViewModel {
         return this.agendaItem;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.assignment.title;
-    }
+    };
 
     public formatForSearch(): SearchRepresentation {
         throw new Error('TODO');

client/src/app/site/base/agenda-information.ts

@@ -8,12 +8,12 @@ export interface AgendaInformation extends DetailNavigable {
     /**
      * Should return the title for the agenda list view.
      */
-    getAgendaTitle(): string;
+    getAgendaTitle: () => string;
 
     /**
      * Should return the title for the list of speakers view.
      */
-    getAgendaTitleWithType(): string;
+    getAgendaTitleWithType: () => string;
 
     /**
      * An (optional) descriptive text to be exported in the CSV.

client/src/app/site/base/base-agenda-view-model.ts

@@ -3,26 +3,40 @@ import { BaseProjectableViewModel } from './base-projectable-view-model';
 import { SearchRepresentation } from 'app/core/ui-services/search.service';
 import { ViewItem } from '../agenda/models/view-item';
 
+export function isAgendaBaseModel(obj: object): obj is BaseAgendaViewModel {
+    const agendaViewModel = <BaseAgendaViewModel>obj;
+    return (
+        agendaViewModel.getAgendaTitle !== undefined &&
+        agendaViewModel.getAgendaTitleWithType !== undefined &&
+        agendaViewModel.getCSVExportText !== undefined &&
+        agendaViewModel.getAgendaItem !== undefined &&
+        agendaViewModel.getDetailStateURL !== undefined
+    );
+}
+
 /**
  * Base view class for projectable models.
  */
 export abstract class BaseAgendaViewModel extends BaseProjectableViewModel implements AgendaInformation {
+    /**
+     * @returns the contained agenda item
+     */
     public abstract getAgendaItem(): ViewItem;
 
     /**
      * @returns the agenda title
      */
-    public getAgendaTitle(): string {
+    public getAgendaTitle = () => {
         return this.getTitle();
-    }
+    };
 
     /**
      * @return the agenda title with the verbose name of the content object
      */
-    public getAgendaTitleWithType(): string {
+    public getAgendaTitleWithType = () => {
         // Return the agenda title with the model's verbose name appended
         return this.getAgendaTitle() + ' (' + this.getVerboseName() + ')';
-    }
+    };
 
     /**
      * @returns the (optional) descriptive text to be exported in the CSV.

client/src/app/site/base/base-projectable-view-model.ts

@@ -5,9 +5,5 @@ import { BaseViewModel } from './base-view-model';
  * Base view class for projectable models.
  */
 export abstract class BaseProjectableViewModel extends BaseViewModel implements Projectable {
-    public constructor(verboseName: string) {
-        super(verboseName);
-    }
-
     public abstract getSlide(): ProjectorElementBuildDeskriptor;
 }

client/src/app/site/base/base-view-model.ts

@@ -1,50 +1,60 @@
 import { Displayable } from './displayable';
 import { Identifiable } from '../../shared/models/base/identifiable';
+import { Collection } from 'app/shared/models/base/collection';
 
 export type ViewModelConstructor<T extends BaseViewModel> = new (...args: any[]) => T;
 
 /**
  * Base class for view models. alls view models should have titles.
  */
-export abstract class BaseViewModel implements Displayable, Identifiable {
+export abstract class BaseViewModel implements Displayable, Identifiable, Collection {
     /**
      * Force children to have an id.
      */
     public abstract id: number;
 
     /**
-     * Children should also have a verbose name for generic display purposes
+     * force children of BaseModel to have a collectionString.
+     *
+     * Has a getter but no setter.
      */
-    protected _verboseName: string;
+    protected _collectionString: string;
-
-    public constructor(verboseName: string) {
-        this._verboseName = verboseName;
-    }
 
     /**
-     * Returns the verbose name. Makes it plural by adding a 's'.
+     * returns the collectionString.
+     *
+     * The server and the dataStore use it to identify the collection.
+     */
+    public get collectionString(): string {
+        return this._collectionString;
+    }
+
+    public abstract getTitle: () => string;
+
+    /**
+     * Returns the verbose name.
      *
      * @param plural If the name should be plural
      * @returns the verbose name of the model
      */
-    public getVerboseName(plural: boolean = false): string {
+    public abstract getVerboseName: (plural?: boolean) => string;
-        if (plural) {
+
-            return this._verboseName + 's'; // I love english. This works for all our models (participantS, electionS,
+    /**
-            // topicS, motionS, (media)fileS, motion blockS, commentS, personal noteS, projectorS, messageS, countdownS, ...)
+     * TODO: Remove verboseName, this must be overwritten by repos..
-            // Just categorIES need to overwrite this...
+     *
-        } else {
+     * @param verboseName
-            return this._verboseName;
+     * @param collectionString
-        }
+     */
+    public constructor(collectionString: string) {
+        this._collectionString = collectionString;
     }
 
+    public getListTitle: () => string = () => {
+        return this.getTitle();
+    };
+
     public abstract updateDependencies(update: BaseViewModel): void;
 
-    public abstract getTitle(): string;
-
-    public getListTitle(): string {
-        return this.getTitle();
-    }
-
     public toString(): string {
         return this.getTitle();
     }

client/src/app/site/base/displayable.ts

@@ -3,12 +3,12 @@
  */
 export interface Displayable {
     /**
-     * Should return the title. Alway used except for list view, the agenda and in the projector.
+     * Should return the title. Always used except for list view, the agenda and in the projector.
      */
-    getTitle(): string;
+    getTitle: () => string;
 
     /**
      * Should return the title for the list view.
      */
-    getListTitle(): string;
+    getListTitle: () => string;
 }

client/src/app/site/common/models/view-chatmessage.ts

@@ -4,6 +4,11 @@ import { BaseViewModel } from 'app/site/base/base-view-model';
 export class ViewChatMessage extends BaseViewModel {
     private _chatMessage: ChatMessage;
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public get chatmessage(): ChatMessage {
         return this._chatMessage;
     }
@@ -17,13 +22,13 @@ export class ViewChatMessage extends BaseViewModel {
     }
 
     public constructor(message?: ChatMessage) {
-        super('Chatmessage');
+        super(ChatMessage.COLLECTIONSTRING);
         this._chatMessage = message;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return 'Chatmessage';
-    }
+    };
 
     public updateDependencies(message: BaseViewModel): void {}
 }

client/src/app/site/config/models/view-config.ts

@@ -93,14 +93,19 @@ export class ViewConfig extends BaseViewModel {
         return this._defaultValue;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(config: Config) {
-        super('Config');
+        super(Config.COLLECTIONSTRING);
         this._config = config;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.label;
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {}
 

client/src/app/site/history/models/view-history.ts

@@ -68,6 +68,11 @@ export class ViewHistory extends BaseViewModel {
         return this.history.now;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     /**
      * Construction of a ViewHistory
      *
@@ -75,7 +80,7 @@ export class ViewHistory extends BaseViewModel {
      * @param user the real user BaseModel
      */
     public constructor(history: History, user?: ViewUser) {
-        super('History');
+        super(History.COLLECTIONSTRING);
         this._history = history;
         this._user = user;
     }
@@ -112,9 +117,9 @@ export class ViewHistory extends BaseViewModel {
      *
      * @returns history.getTitle which returns the element_id
      */
-    public getTitle(): string {
+    public getTitle = () => {
         return this.element_id;
-    }
+    };
 
     /**
      * Updates the history object with new values

client/src/app/site/mediafiles/models/view-mediafile.ts

@@ -61,15 +61,20 @@ export class ViewMediafile extends BaseViewModel implements Searchable {
         return this.mediafile.hidden;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(mediafile: Mediafile, uploader?: ViewUser) {
-        super('Mediafile');
+        super(Mediafile.COLLECTIONSTRING);
         this._mediafile = mediafile;
         this._uploader = uploader;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.title;
-    }
+    };
 
     public formatForSearch(): SearchRepresentation {
         return [this.title];

client/src/app/site/motions/models/view-category.ts

@@ -41,29 +41,19 @@ export class ViewCategory extends BaseViewModel implements Searchable {
         return this.prefix ? this.prefix + ' - ' + this.name : this.name;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(category: Category) {
-        super('Category');
+        super(Category.COLLECTIONSTRING);
         this._category = category;
     }
 
-    /**
+    public getTitle = () => {
-     * Returns the verbose name of this model.
-     *
-     * @override
-     * @param plural If the name should be plural
-     * @param The verbose name
-     */
-    public getVerboseName(plural: boolean = false): string {
-        if (plural) {
-            return 'Categories';
-        } else {
-            return this._verboseName;
-        }
-    }
-
-    public getTitle(): string {
         return this.prefixedName;
-    }
+    };
 
     public formatForSearch(): SearchRepresentation {
         return [this.name, this.prefix];

client/src/app/site/motions/models/view-change-recommendation.ts

@@ -21,14 +21,19 @@ export class ViewMotionChangeRecommendation extends BaseViewModel implements Vie
         return this._changeRecommendation;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(changeReco: MotionChangeRecommendation) {
-        super('Change recommendation');
+        super(MotionChangeRecommendation.COLLECTIONSTRING);
         this._changeRecommendation = changeReco;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return 'Changerecommendation';
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {}
 

client/src/app/site/motions/models/view-create-motion.ts

@@ -46,6 +46,10 @@ export class ViewCreateMotion extends ViewMotion {
         super(motion, category, submitters, supporters, workflow, state, item, block, null);
     }
 
+    public getVerboseName = () => {
+        throw new Error('This should not be used');
+    };
+
     /**
      * Duplicate this motion into a copy of itself
      */

client/src/app/site/motions/models/view-motion-block.ts

@@ -34,8 +34,13 @@ export class ViewMotionBlock extends BaseAgendaViewModel implements Searchable {
         return this.motionBlock.agenda_item_id;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(motionBlock: MotionBlock, agendaItem?: ViewItem) {
-        super('Motion block');
+        super(MotionBlock.COLLECTIONSTRING);
         this._motionBlock = motionBlock;
         this._agendaItem = agendaItem;
     }
@@ -68,9 +73,9 @@ export class ViewMotionBlock extends BaseAgendaViewModel implements Searchable {
         }
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.title;
-    }
+    };
 
     public getSlide(): ProjectorElementBuildDeskriptor {
         throw new Error('todo');

client/src/app/site/motions/models/view-motion-comment-section.ts

@@ -47,16 +47,21 @@ export class ViewMotionCommentSection extends BaseViewModel {
         this._section.name = name;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(section: MotionCommentSection, readGroups: ViewGroup[], writeGroups: ViewGroup[]) {
-        super('Comment section');
+        super(MotionCommentSection.COLLECTIONSTRING);
         this._section = section;
         this._readGroups = readGroups;
         this._writeGroups = writeGroups;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     /**
      * Updates the local objects if required

client/src/app/site/motions/models/view-motion.ts

@@ -318,6 +318,21 @@ export class ViewMotion extends BaseAgendaViewModel implements Searchable {
         return this.personalNote && this.personalNote.note ? true : false;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getAgendaTitle;
+
+    /**
+     * This is set by the repository
+     */
+    public getAgendaTitleWithType;
+
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(
         motion: Motion,
         category?: ViewCategory,
@@ -331,7 +346,7 @@ export class ViewMotion extends BaseAgendaViewModel implements Searchable {
         tags?: ViewTag[],
         parent?: ViewMotion
     ) {
-        super('Motion');
+        super(Motion.COLLECTIONSTRING);
         this._motion = motion;
         this._category = category;
         this._submitters = submitters;
@@ -345,36 +360,18 @@ export class ViewMotion extends BaseAgendaViewModel implements Searchable {
         this._parent = parent;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         if (this.identifier) {
             return this.identifier + ': ' + this.title;
         } else {
             return this.title;
         }
-    }
+    };
 
     public getAgendaItem(): ViewItem {
         return this.item;
     }
 
-    public getAgendaTitle(): string {
-        // if the identifier is set, the title will be 'Motion <identifier>'.
-        if (this.identifier) {
-            return 'Motion ' + this.identifier;
-        } else {
-            return this.getTitle();
-        }
-    }
-
-    public getAgendaTitleWithType(): string {
-        // Append the verbose name only, if not the special format 'Motion <identifier>' is used.
-        if (this.identifier) {
-            return 'Motion ' + this.identifier;
-        } else {
-            return this.getTitle() + ' (' + this.getVerboseName() + ')';
-        }
-    }
-
     /**
      * Formats the category for search
      *

client/src/app/site/motions/models/view-statute-paragraph.ts

@@ -33,14 +33,19 @@ export class ViewStatuteParagraph extends BaseViewModel implements Searchable {
         return this.statuteParagraph.weight;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(paragraph: StatuteParagraph) {
-        super('Statute paragraph');
+        super(StatuteParagraph.COLLECTIONSTRING);
         this._paragraph = paragraph;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.title;
-    }
+    };
 
     public formatForSearch(): SearchRepresentation {
         throw new Error('TODO');

client/src/app/site/motions/models/view-workflow.ts

@@ -33,14 +33,19 @@ export class ViewWorkflow extends BaseViewModel {
         return this.getStateById(this.first_state_id);
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(workflow: Workflow) {
-        super('Workflow');
+        super(Workflow.COLLECTIONSTRING);
         this._workflow = workflow;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     /**
      * Duplicate this motion into a copy of itself

client/src/app/site/projector/models/view-countdown.ts

@@ -18,14 +18,19 @@ export class ViewCountdown extends BaseProjectableViewModel {
         return this.countdown.description;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(countdown: Countdown) {
-        super('Countdown');
+        super(Countdown.COLLECTIONSTRING);
         this._countdown = countdown;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.description;
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {}
 

client/src/app/site/projector/models/view-projector.ts

@@ -52,14 +52,19 @@ export class ViewProjector extends BaseViewModel {
         return this.projector.reference_projector_id;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(projector?: Projector) {
-        super('Projector');
+        super(Projector.COLLECTIONSTRING);
         this._projector = projector;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {}
 }

client/src/app/site/projector/models/view-projectormessage.ts

@@ -18,14 +18,19 @@ export class ViewProjectorMessage extends BaseProjectableViewModel {
         return this.projctormessage.message;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(message: ProjectorMessage) {
-        super('Message');
+        super(ProjectorMessage.COLLECTIONSTRING);
         this._message = message;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return 'Message';
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {}
 

client/src/app/site/tags/models/view-tag.ts

@@ -25,14 +25,19 @@ export class ViewTag extends BaseViewModel implements Searchable {
         return this.tag.name;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(tag: Tag) {
-        super('Tag');
+        super(Tag.COLLECTIONSTRING);
         this._tag = tag;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     public formatForSearch(): SearchRepresentation {
         return [this.name];

client/src/app/site/users/models/view-group.ts

@@ -29,8 +29,13 @@ export class ViewGroup extends BaseViewModel {
         return this.group.permissions;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(group?: Group) {
-        super('Group');
+        super(Group.COLLECTIONSTRING);
         this._group = group;
     }
 
@@ -65,9 +70,9 @@ export class ViewGroup extends BaseViewModel {
         return this.permissions.includes(perm);
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.name;
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {
         console.log('ViewGroups wants to update Values with : ', update);

client/src/app/site/users/models/view-personal-note.ts

@@ -12,14 +12,19 @@ export class ViewPersonalNote extends BaseViewModel {
         return this.personalNote ? this.personalNote.id : null;
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(personalNote?: PersonalNote) {
-        super('Personal note');
+        super(PersonalNote.COLLECTIONSTRING);
         this._personalNote = personalNote;
     }
 
-    public getTitle(): string {
+    public getTitle = () => {
         return this.personalNote ? this.personalNote.toString() : null;
-    }
+    };
 
     public updateDependencies(update: BaseViewModel): void {
         throw new Error('Todo');

client/src/app/site/users/models/view-user.ts

@@ -160,8 +160,13 @@ export class ViewUser extends BaseProjectableViewModel implements Searchable {
         return name.trim();
     }
 
+    /**
+     * This is set by the repository
+     */
+    public getVerboseName;
+
     public constructor(user: User, groups?: ViewGroup[]) {
-        super('Participant');
+        super(User.COLLECTIONSTRING);
         this._user = user;
         this._groups = groups;
     }
@@ -195,9 +200,9 @@ export class ViewUser extends BaseProjectableViewModel implements Searchable {
     /**
      * required by BaseViewModel. Don't confuse with the users title.
      */
-    public getTitle(): string {
+    public getTitle = () => {
         return this.full_name;
-    }
+    };
 
     /**
      * TODO: Implement