feat: add catalog module

src/app/app.module.ts

@@ -39,6 +39,7 @@ import {LoggerModule, NGXLogger, NgxLoggerLevel} from 'ngx-logger';
 import {environment} from '../environments/environment';
 import {AppRoutingModule} from './app-routing.module';
 import {AppComponent} from './app.component';
+import {CatalogModule} from './modules/catalog/catalog.module';
 import {ConfigModule} from './modules/config/config.module';
 import {ConfigProvider} from './modules/config/config.provider';
 import {DataModule} from './modules/data/data.module';
@@ -137,6 +138,7 @@ const providers: Provider[] = [
     AppRoutingModule,
     BrowserModule,
     BrowserAnimationsModule,
+    CatalogModule,
     CommonModule,
     ConfigModule,
     DataModule,

src/app/modules/catalog/catalog.component.html

@@ -0,0 +1,53 @@
+<ion-header>
+  <ion-toolbar>
+    <ion-buttons slot="start">
+      <ion-back-button></ion-back-button>
+      <ion-menu-button></ion-menu-button>
+    </ion-buttons>
+    <!--TODO: read this from the config (menu item title)-->
+    <ion-title>{{ 'catalog.title' | translate | titlecase }}</ion-title>
+  </ion-toolbar>
+</ion-header>
+
+<ion-content>
+  <ion-segment
+    (ionChange)="segmentChanged($event)"
+    [value]="selectedSemesterUID"
+    mode="md"
+  >
+    <ion-segment-button
+      *ngFor="let semester of availableSemesters"
+      [value]="semester.uid"
+    >
+      <ion-label>{{ semester.acronym }}</ion-label>
+    </ion-segment-button>
+  </ion-segment>
+  <ion-list *ngIf="catalogs && catalogs.length > 0">
+    <ion-item
+      *ngFor="let catalog of catalogs"
+      button="true"
+      lines="inset"
+      (click)="notifySelect(catalog)"
+    >
+      <ion-label>
+        <h2>{{ catalog.name }}</h2>
+        <h3>{{ catalog.acronym }}</h3>
+      </ion-label>
+    </ion-item>
+  </ion-list>
+  <ion-list *ngIf="!catalogs">
+    <stapps-skeleton-list-item *ngFor="let skeleton of [].constructor(10)">
+    </stapps-skeleton-list-item>
+  </ion-list>
+  <ion-grid *ngIf="catalogs && catalogs.length === 0">
+    <ion-row>
+      <ion-col>
+        <div class="ion-text-center margin-top">
+          <ion-label>
+            {{ 'catalog.detail.EMPTY_SEMESTER' | translate }}
+          </ion-label>
+        </div>
+      </ion-col>
+    </ion-row>
+  </ion-grid>
+</ion-content>

src/app/modules/catalog/catalog.component.scss

@@ -0,0 +1,9 @@
+
+ion-segment-button {
+  max-width: 100%;
+  text-transform: none;
+}
+
+.margin-top {
+  margin-top: 20vh;
+}

src/app/modules/catalog/catalog.component.ts

@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2021 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {Component, OnInit, OnDestroy} from '@angular/core';
+import {Router, ActivatedRoute} from '@angular/router';
+import {SCCatalog, SCSemester} from '@openstapps/core';
+import moment from 'moment';
+import {Subscription} from 'rxjs';
+import {CatalogProvider} from './catalog.provider';
+import {NGXLogger} from 'ngx-logger';
+import {Location} from '@angular/common';
+import {DataRoutingService} from '../data/data-routing.service';
+
+@Component({
+  selector: 'app-catalog',
+  templateUrl: './catalog.component.html',
+  styleUrls: ['./catalog.component.scss'],
+})
+export class CatalogComponent implements OnInit, OnDestroy {
+  /**
+   * SCSemester to show
+   */
+  activeSemester?: SCSemester;
+
+  /**
+   * UID of the selected SCSemester
+   */
+  selectedSemesterUID = '';
+
+  /**
+   * Available SCSemesters
+   */
+  availableSemesters: SCSemester[] = [];
+
+  /**
+   * Catalogs (SCCatalog) to show
+   */
+  catalogs: SCCatalog[] | undefined;
+
+  /**
+   * Array of all subscriptions to Observables
+   */
+  subscriptions: Subscription[] = [];
+
+  /**
+   * Supercatalog (SCCatalog) to refer to
+   */
+  superCatalog: SCCatalog;
+
+  constructor(
+    private readonly route: ActivatedRoute,
+    private readonly catalogProvider: CatalogProvider,
+    private readonly dataRoutingService: DataRoutingService,
+    private readonly logger: NGXLogger,
+    protected router: Router,
+    public location: Location,
+  ) {
+    this.subscriptions.push(
+      this.dataRoutingService.itemSelectListener().subscribe(item => {
+        void this.router.navigate(['data-detail', item.uid]);
+      }),
+    );
+  }
+
+  ngOnInit() {
+    this.selectedSemesterUID = this.route.snapshot.paramMap.get('uid') ?? '';
+    void this.fetchCatalog();
+  }
+
+  /**
+   * Remove subscriptions when the component is removed
+   */
+  ngOnDestroy() {
+    for (const sub of this.subscriptions) {
+      sub.unsubscribe();
+    }
+  }
+
+  async fetchCatalog() {
+    try {
+      if (this.availableSemesters.length === 0) {
+        await this.fetchSemesters();
+      }
+
+      const response = await this.catalogProvider.getCatalogsWith(
+        0,
+        this.superCatalog,
+        this.activeSemester?.uid,
+      );
+      this.catalogs = (response.data as SCCatalog[]).sort((a, b) => {
+        return new Intl.Collator('en', {
+          numeric: true,
+          sensitivity: 'accent',
+        }).compare(a.name, b.name);
+      });
+    } catch (error) {
+      this.logger.error(error.message);
+      return;
+    }
+  }
+
+  async fetchSemesters(): Promise<void> {
+    const semesters = await this.catalogProvider.getRelevantSemesters();
+    this.availableSemesters = semesters.slice(0, 3).reverse();
+
+    if (typeof this.activeSemester !== 'undefined') {
+      return;
+    }
+    const today = moment().startOf('day').toISOString();
+    this.activeSemester = this.availableSemesters[0];
+    this.activeSemester =
+      this.selectedSemesterUID === ''
+        ? this.availableSemesters.find(
+            semester => semester.startDate <= today && semester.endDate > today,
+          )
+        : this.availableSemesters.find(
+            semester => semester.uid === this.selectedSemesterUID,
+          );
+    if (this.activeSemester && this.selectedSemesterUID === '') {
+      this.selectedSemesterUID = this.activeSemester.uid;
+      this.updateLocation(this.selectedSemesterUID);
+    }
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  segmentChanged(event: any) {
+    this.updateLocation(event.detail.value as string);
+    this.activeSemester = this.availableSemesters.find(
+      semester => semester.uid === (event.detail.value as string),
+    );
+    delete this.catalogs;
+    void this.fetchCatalog();
+  }
+
+  updateLocation(semesterUID: string) {
+    const url = this.router
+      .createUrlTree(['/catalog/', semesterUID])
+      .toString();
+    this.location.go(url);
+  }
+
+  /**
+   * Emit event that a catalog item was selected
+   */
+  notifySelect(catalog: SCCatalog) {
+    this.dataRoutingService.emitChildEvent(catalog);
+  }
+}

src/app/modules/catalog/catalog.module.ts

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2021 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {CommonModule} from '@angular/common';
+import {NgModule} from '@angular/core';
+import {FormsModule} from '@angular/forms';
+import {RouterModule, Routes} from '@angular/router';
+import {IonicModule} from '@ionic/angular';
+import {TranslateModule} from '@ngx-translate/core';
+import {MomentModule} from 'ngx-moment';
+import {DataModule} from '../data/data.module';
+import {SettingsProvider} from '../settings/settings.provider';
+import {CatalogComponent} from './catalog.component';
+
+const catalogRoutes: Routes = [
+  {path: 'catalog', component: CatalogComponent},
+  {path: 'catalog/:uid', component: CatalogComponent},
+];
+
+/**
+ * Catalog Module
+ */
+@NgModule({
+  declarations: [CatalogComponent],
+  imports: [
+    IonicModule.forRoot(),
+    FormsModule,
+    TranslateModule.forChild(),
+    RouterModule.forChild(catalogRoutes),
+    CommonModule,
+    MomentModule,
+    DataModule,
+  ],
+  providers: [SettingsProvider],
+})
+export class CatalogModule {}

src/app/modules/catalog/catalog.provider.ts

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2021 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {Injectable} from '@angular/core';
+import {
+  SCCatalogWithoutReferences,
+  SCSearchFilter,
+  SCSearchResponse,
+  SCSemester,
+  SCThingType,
+} from '@openstapps/core';
+import {DataProvider} from '../data/data.provider';
+/**
+ * Service for providing catalog and semester data
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class CatalogProvider {
+  constructor(private readonly dataProvider: DataProvider) {}
+
+  /**
+   * Get news messages
+   * TODO: make dates sortable on the backend side and then adjust this method
+   *
+   * @param offset TODO
+   * @param superCatalog TODO
+   * @param semesterUID TODO
+   */
+  async getCatalogsWith(
+    offset?: number,
+    superCatalog?: SCCatalogWithoutReferences,
+    semesterUID?: string,
+  ): Promise<SCSearchResponse> {
+    const filters: SCSearchFilter[] = [
+      {
+        type: 'value',
+        arguments: {
+          field: 'type',
+          value: 'catalog',
+        },
+      },
+    ];
+
+    if (typeof semesterUID === 'string') {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'academicTerm.uid',
+          value: semesterUID,
+        },
+      });
+    }
+
+    if (typeof superCatalog?.uid === 'string') {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'superCatalog.uid',
+          value: superCatalog.uid,
+        },
+      });
+    } else {
+      filters.push({
+        type: 'value',
+        arguments: {
+          field: 'level',
+          value: '0',
+        },
+      });
+    }
+
+    return this.dataProvider.search({
+      filter: {
+        arguments: {
+          operation: 'and',
+          filters: filters,
+        },
+        type: 'boolean',
+      },
+      size: 40,
+      from: offset,
+      sort: [
+        {
+          type: 'ducet',
+          order: 'asc',
+          arguments: {
+            field: 'name',
+          },
+        },
+      ],
+    });
+  }
+
+  async getRelevantSemesters(): Promise<SCSemester[]> {
+    const response = await this.dataProvider.search({
+      filter: {
+        arguments: {
+          field: 'type',
+          value: SCThingType.Semester,
+        },
+        type: 'value',
+      },
+      size: 10,
+    });
+
+    return (response.data as SCSemester[]).sort((a, b) =>
+      b.startDate.localeCompare(a.startDate, 'en'),
+    );
+  }
+}

src/app/modules/data/data.module.ts

@@ -81,6 +81,7 @@ import {OriginInListComponent} from './elements/origin-in-list.component';
 import {CoordinatedSearchProvider} from './coordinated-search.provider';
 import {Geolocation} from '@ionic-native/geolocation/ngx';
 import {FavoriteButtonComponent} from './elements/favorite-button.component';
+import {SimpleDataListComponent} from './list/simple-data-list.component';
 
 /**
  * Module for handling data
@@ -135,8 +136,9 @@ import {FavoriteButtonComponent} from './elements/favorite-button.component';
     SkeletonSimpleCardComponent,
     VideoDetailContentComponent,
     VideoListItemComponent,
+    SimpleDataListComponent,
   ],
-  entryComponents: [DataListComponent],
+  entryComponents: [DataListComponent, SimpleDataListComponent],
   imports: [
     CommonModule,
     DataRoutingModule,
@@ -177,6 +179,7 @@ import {FavoriteButtonComponent} from './elements/favorite-button.component';
     SkeletonListItemComponent,
     SkeletonSimpleCardComponent,
     SearchPageComponent,
+    SimpleDataListComponent,
   ],
 })
 export class DataModule {}

src/app/modules/data/elements/long-inline-text.html

@@ -1,3 +1,14 @@
-<span
+<span class="ion-hide-sm-up">
-  >{{ text | slice: 0:size }}<span *ngIf="text.length > size">...</span></span
+  {{ text | slice: 0:size }}
->
+  <span *ngIf="text.length > size" class="ion-hide-sm-up">…</span>
+</span>
+<span class="ion-hide-sm-down ion-hide-md-up">
+  {{ text | slice: 0:size * 2 }}
+  <span *ngIf="text.length > size * 2" class="ion-hide-sm-down ion-hide-md-up">
+    …
+  </span>
+</span>
+<span class="ion-hide-md-down">
+  {{ text | slice: 0:size * 3 }}
+  <span *ngIf="text.length > size * 3" class="ion-hide-md-down">…</span>
+</span>

src/app/modules/data/elements/skeleton-list-item.component.ts

@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {Component} from '@angular/core';
+import {Component, Input} from '@angular/core';
 
 /**
  * A placeholder to show when a list item is being loaded
@@ -22,4 +22,6 @@ import {Component} from '@angular/core';
   templateUrl: 'skeleton-list-item.html',
   styleUrls: ['skeleton-list-item.scss'],
 })
-export class SkeletonListItemComponent {}
+export class SkeletonListItemComponent {
+  @Input() hideThumbnail = false;
+}

src/app/modules/data/elements/skeleton-list-item.html

@@ -1,5 +1,5 @@
 <ion-item>
-  <ion-thumbnail slot="start" class="ion-margin-end">
+  <ion-thumbnail *ngIf="!hideThumbnail" slot="start" class="ion-margin-end">
     <ion-skeleton-text animated></ion-skeleton-text>
   </ion-thumbnail>
   <ion-grid>

src/app/modules/data/list/data-list.component.ts

@@ -26,7 +26,6 @@ import {
   ViewChild,
 } from '@angular/core';
 import {SCThings} from '@openstapps/core';
-import {ceil} from 'lodash-es';
 import {BehaviorSubject, Observable, Subscription} from 'rxjs';
 
 /**
@@ -72,7 +71,7 @@ export class DataListComponent implements OnChanges, OnInit, OnDestroy {
   /**
    * Items that display the skeleton list
    */
-  skeletonItems: number[];
+  skeletonItems: number;
 
   /**
    * Array of all subscriptions to Observables
@@ -84,12 +83,10 @@ export class DataListComponent implements OnChanges, OnInit, OnDestroy {
   /**
    * Calculate how many items would fill the screen
    */
-  @HostListener('window.resize', ['$event'])
+  @HostListener('window:resize', ['$event'])
   calcSkeletonItems() {
-    const itemHeight = 122;
+    const itemHeight = 40;
-    this.skeletonItems = Array.from({
+    this.skeletonItems = Math.ceil(window.innerHeight / itemHeight);
-      length: ceil(window.innerHeight / itemHeight),
-    });
   }
 
   /**

src/app/modules/data/list/data-list.html

@@ -22,6 +22,7 @@
 </div>
 <ion-list [style.display]="items ? 'none' : 'block'">
   <stapps-skeleton-list-item
-    *ngFor="let skeleton of skeletonItems"
+    [hideThumbnail]="singleType"
+    *ngFor="let skeleton of [].constructor(skeletonItems)"
   ></stapps-skeleton-list-item>
 </ion-list>

src/app/modules/data/list/data-list.scss

@@ -1,5 +1,6 @@
+
 cdk-virtual-scroll-viewport {
-  min-height: 100%;
+  height: 100%;
   width: 100%;
 }
 
@@ -8,3 +9,7 @@ cdk-virtual-scroll-viewport {
     width: 100%;
   }
 }
+
+.virtual-scroll-expander {
+  clear: both;
+}

src/app/modules/data/list/search-page.component.ts

@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {Component, Input} from '@angular/core';
+import {Component, Input, OnInit, OnDestroy} from '@angular/core';
 import {Router} from '@angular/router';
 import {AlertController} from '@ionic/angular';
 import {
@@ -39,7 +39,7 @@ import {PositionService} from '../../map/position.service';
   templateUrl: 'search-page.html',
   providers: [ContextMenuService],
 })
-export class SearchPageComponent {
+export class SearchPageComponent implements OnInit, OnDestroy {
   /**
    * Api query filter
    */
@@ -126,9 +126,7 @@ export class SearchPageComponent {
     protected dataRoutingService: DataRoutingService,
     protected router: Router,
     protected positionService: PositionService,
-  ) {
+  ) {}
-    this.initialize();
-  }
 
   /**
    * Fetches items with set query configuration
@@ -230,7 +228,8 @@ export class SearchPageComponent {
     this.contextMenuService.updateContextFilter(facets);
   }
 
-  ionViewWillEnter() {
+  ngOnInit() {
+    this.initialize();
     this.contextMenuService.setContextSort({
       name: 'sort',
       reversed: false,
@@ -290,7 +289,7 @@ export class SearchPageComponent {
     );
   }
 
-  ionViewWillLeave() {
+  ngOnDestroy() {
     for (const subscription of this.subscriptions) {
       subscription.unsubscribe();
     }

src/app/modules/data/list/simple-data-list.component.ts

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {Component, Input, OnDestroy, OnInit} from '@angular/core';
+import {SCThings} from '@openstapps/core';
+import {Subscription} from 'rxjs';
+import {Router} from '@angular/router';
+import {DataRoutingService} from '../data-routing.service';
+
+/**
+ * Shows the list of items
+ */
+@Component({
+  selector: 'stapps-simple-data-list',
+  templateUrl: 'simple-data-list.html',
+  styleUrls: ['simple-data-list.scss'],
+})
+export class SimpleDataListComponent implements OnInit, OnDestroy {
+  /**
+   * All SCThings to display
+   */
+  @Input() items?: SCThings[];
+
+  /**
+   * Indicates whether or not the list is to display SCThings of a single type
+   */
+  @Input() singleType = false;
+
+  /**
+   * List header
+   */
+  @Input() listHeader?: string;
+
+  /**
+   * Items that display the skeleton list
+   */
+  skeletonItems = 6;
+
+  /**
+   * Array of all subscriptions to Observables
+   */
+  subscriptions: Subscription[] = [];
+
+  constructor(
+    protected router: Router,
+    private readonly dataRoutingService: DataRoutingService,
+  ) {}
+
+  ngOnInit(): void {
+    this.subscriptions.push(
+      this.dataRoutingService.itemSelectListener().subscribe(item => {
+        void this.router.navigate(['data-detail', item.uid]);
+      }),
+    );
+  }
+
+  /**
+   * Remove subscriptions when the component is removed
+   */
+  ngOnDestroy() {
+    for (const sub of this.subscriptions) {
+      sub.unsubscribe();
+    }
+  }
+}

src/app/modules/data/list/simple-data-list.html

@@ -0,0 +1,28 @@
+<ng-container *ngIf="items | async as items; else loading">
+  <ion-list>
+    <ng-container *ngIf="!listHeader; else header"></ng-container>
+    <stapps-data-list-item
+      *ngFor="let item of items"
+      [item]="item"
+      [hideThumbnail]="singleType"
+    ></stapps-data-list-item>
+  </ion-list>
+</ng-container>
+<ng-template #loading>
+  <ion-list>
+    <stapps-skeleton-list-item
+      [hideThumbnail]="singleType"
+      *ngFor="let skeleton of [].constructor(skeletonItems)"
+    >
+    </stapps-skeleton-list-item>
+  </ion-list>
+</ng-template>
+<ng-template #header>
+  <ion-list-header lines="inset">
+    <ion-text color="dark">
+      <h3>
+        {{ listHeader }}
+      </h3>
+    </ion-text>
+  </ion-list-header>
+</ng-template>

src/app/modules/data/types/catalog/catalog-detail-content.component.ts

@@ -12,19 +12,159 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {Component, Input} from '@angular/core';
+import {
-import {SCCatalog} from '@openstapps/core';
+  Component,
+  Input,
+  OnInit,
+  ViewChild,
+  ElementRef,
+  HostListener,
+  OnDestroy,
+  OnChanges,
+} from '@angular/core';
+import {SCCatalog, SCSearchBooleanFilter} from '@openstapps/core';
+import {SearchPageComponent} from '../../list/search-page.component';
+
+enum AccordionButtonState {
+  collapsed = 'chevron-down',
+  expanded = 'chevron-up',
+}
 
-/**
- * TODO
- */
 @Component({
   selector: 'stapps-catalog-detail-content',
   templateUrl: 'catalog-detail-content.html',
+  styleUrls: ['catalog-detail-content.scss'],
 })
-export class CatalogDetailContentComponent {
+export class CatalogDetailContentComponent
+  extends SearchPageComponent
+  implements OnInit, OnDestroy, OnChanges
+{
   /**
-   * TODO
+   * SCCatalog to display
    */
   @Input() item: SCCatalog;
+
+  @ViewChild('accordionTextArea') accordionTextArea: ElementRef;
+
+  buttonState = AccordionButtonState.collapsed;
+
+  buttonShown = true;
+
+  descriptionLinesShown: number;
+
+  descriptionLinesTotal: number;
+
+  descriptionPreviewLines = 3;
+
+  descriptionLinesToDisplay = 0;
+
+  ngOnInit() {
+    super.ngOnInit();
+    if (this.item.description) {
+      this.descriptionLinesToDisplay = this.descriptionPreviewLines;
+      setTimeout(() => this.checkTextElipsis(), 0);
+    }
+  }
+
+  ngOnChanges() {
+    this.checkTextElipsis();
+  }
+
+  initialize() {
+    this.pageSize = 100;
+    this.sortQuery = {
+      arguments: {field: 'name'},
+      order: 'asc',
+      type: 'ducet',
+    };
+
+    const subCatalogFilter: SCSearchBooleanFilter = {
+      arguments: {
+        operation: 'and',
+        filters: [
+          {
+            type: 'value',
+            arguments: {
+              field: 'type',
+              value: 'catalog',
+            },
+          },
+          {
+            type: 'value',
+            arguments: {
+              field: 'superCatalog.uid',
+              value: this.item.uid,
+            },
+          },
+        ],
+      },
+      type: 'boolean',
+    };
+
+    const subEventsFilter: SCSearchBooleanFilter = {
+      arguments: {
+        operation: 'and',
+        filters: [
+          {
+            type: 'value',
+            arguments: {
+              field: 'type',
+              value: 'academic event',
+            },
+          },
+          {
+            type: 'value',
+            arguments: {
+              field: 'catalogs.uid',
+              value: this.item.uid,
+            },
+          },
+        ],
+      },
+      type: 'boolean',
+    };
+
+    this.forcedFilter = {
+      arguments: {
+        filters: [subCatalogFilter, subEventsFilter],
+        operation: 'or',
+      },
+      type: 'boolean',
+    };
+  }
+
+  @HostListener('window:resize', ['$event'])
+  checkTextElipsis() {
+    if (typeof this.accordionTextArea === 'undefined') {
+      return;
+    }
+    const element = this.accordionTextArea.nativeElement as HTMLElement;
+
+    const lineHeight = Number.parseInt(
+      getComputedStyle(element).getPropertyValue('line-height'),
+    );
+    this.descriptionLinesTotal = element?.scrollHeight / lineHeight;
+    this.descriptionLinesShown = element?.offsetHeight / lineHeight;
+    if (this.buttonState === AccordionButtonState.expanded) {
+      this.descriptionLinesToDisplay = this.descriptionLinesTotal;
+    }
+    const isElipsed = element?.offsetHeight < element?.scrollHeight;
+    this.buttonShown =
+      (isElipsed && this.buttonState === AccordionButtonState.collapsed) ||
+      (!isElipsed && this.buttonState === AccordionButtonState.expanded);
+  }
+
+  toggleDescriptionAccordion() {
+    if (this.descriptionLinesToDisplay > 0) {
+      this.descriptionLinesToDisplay =
+        this.descriptionLinesToDisplay === this.descriptionPreviewLines
+          ? this.descriptionLinesTotal
+          : this.descriptionPreviewLines;
+    }
+    this.buttonState =
+      this.buttonState === AccordionButtonState.collapsed
+        ? AccordionButtonState.expanded
+        : AccordionButtonState.collapsed;
+    setTimeout(() => this.checkTextElipsis(), 0);
+  }
 }

src/app/modules/data/types/catalog/catalog-detail-content.html

@@ -1,5 +1,33 @@
-<stapps-simple-card
+<ion-card>
-  [title]="'categories' | propertyNameTranslate: item | titlecase"
+  <ion-card-content>
-  [content]="'categories' | thingTranslate: item"
+    <ion-text color="dark">
+      <h1>
+        {{ 'name' | thingTranslate: item }}
+      </h1>
+    </ion-text>
+    <div *ngIf="item.description">
+      <br />
+      <div
+        class="text-accordion"
+        [style.-webkit-line-clamp]="descriptionLinesToDisplay"
+        #accordionTextArea
+      >
+        {{ 'description' | thingTranslate: item }}
+      </div>
+    </div>
+  </ion-card-content>
+</ion-card>
+<ion-button
+  expand="full"
+  fill="clear"
+  *ngIf="item.description && buttonShown"
+  (click)="toggleDescriptionAccordion()"
 >
-</stapps-simple-card>
+  <ion-icon [name]="buttonState" size="large"></ion-icon>
+</ion-button>
+<stapps-simple-data-list
+  id="simple-data-list"
+  [items]="items"
+  [singleType]="true"
+  [listHeader]="'type' | thingTranslate: item | titlecase"
+></stapps-simple-data-list>

src/app/modules/data/types/catalog/catalog-detail-content.scss

@@ -0,0 +1,6 @@
+.text-accordion {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  display: -webkit-box;
+  -webkit-box-orient: vertical;
+}

src/app/modules/data/types/catalog/catalog-list-item.html

@@ -2,14 +2,14 @@
   <ion-row>
     <ion-col>
       <div class="ion-text-wrap">
-        <h2 class="name">{{ 'name' | thingTranslate: item }}</h2>
+        <ion-label>
-        <p *ngIf="item.description">
+          <h2>
-          <stapps-long-inline-text
+            {{ 'name' | thingTranslate: item }}
-            [text]="'description' | thingTranslate: item"
+          </h2>
-            [size]="80"
+        </ion-label>
-          ></stapps-long-inline-text>
+        <ion-note *ngIf="item.academicTerm">{{
-        </p>
+          item.academicTerm.name
-        <p *ngIf="item.academicTerm">{{ item.academicTerm.name }}</p>
+        }}</ion-note>
       </div>
     </ion-col>
   </ion-row>

src/app/modules/favorites/favorites-page.component.ts

@@ -58,7 +58,6 @@ export class FavoritesPageComponent extends SearchPageComponent {
   }
 
   ionViewWillEnter() {
-    super.ionViewWillEnter();
     this.subscriptions.push(
       this.favoritesService.favoritesChanged$.subscribe(_favoritesMap => {
         this.fetchAndUpdateItems();

src/assets/i18n/de.json

@@ -88,7 +88,7 @@
     "page": {
       "TITLE": "Karte",
       "search": {
-        "PLACEHOLDER": "Finde Gebäude, Points of Interest, Mensen und Cafés ..."
+        "PLACEHOLDER": "Gebäude, Points of Interest, Mensen und mehr"
       },
       "buttons": {
         "SHOW_LIST": "Liste ansehen",
@@ -110,6 +110,12 @@
       }
     }
   },
+  "catalog": {
+    "title": "Vorlesungsverzeichnis",
+    "detail": {
+      "EMPTY_SEMESTER": "Keine Verzeichnisdaten für das ausgewählte Semester vorhanden"
+    }
+  },
   "menu": {
     "context": {
       "title": "Kontext Menü",

src/assets/i18n/en.json

@@ -88,7 +88,7 @@
     "page": {
       "TITLE": "Map",
       "search": {
-        "PLACEHOLDER": "Find buildings, points of interests, canteens and cafes ..."
+        "PLACEHOLDER": "Buildings, points of interests, canteens and more"
       },
       "buttons": {
         "SHOW_LIST": "Show list",
@@ -110,6 +110,12 @@
       }
     }
   },
+  "catalog": {
+    "title": "course catalog",
+    "detail": {
+      "EMPTY_SEMESTER": "No catalog data available for selected semester"
+    }
+  },
   "menu": {
     "context": {
       "title": "context menu",