transpose & history

src/app/modules/songs/song/edit/edit.component.html

@@ -1,4 +1,5 @@
 <div>
   <app-edit-song></app-edit-song>
   <app-edit-file></app-edit-file>
+  <app-history></app-history>
 </div>

src/app/modules/songs/song/edit/edit.module.ts

@@ -24,10 +24,11 @@ import {ButtonModule} from '../../../../widget-modules/components/button/button.
 import {MatTooltipModule} from '@angular/material/tooltip';
 import {SaveDialogComponent} from './edit-song/save-dialog/save-dialog.component';
 import {MatDialogModule} from '@angular/material/dialog';
+import {HistoryComponent} from './history/history.component';
 
 
 @NgModule({
-  declarations: [EditComponent, EditSongComponent, EditFileComponent, FileComponent, SaveDialogComponent],
+  declarations: [EditComponent, EditSongComponent, EditFileComponent, FileComponent, SaveDialogComponent, HistoryComponent],
   exports: [EditComponent],
   bootstrap: [SaveDialogComponent],
   imports: [

src/app/modules/songs/song/edit/history/history.component.html

@@ -0,0 +1,6 @@
+<app-card *ngIf="song && song.edits" heading="letzte Änderungen">
+  <div *ngFor="let edit of song.edits" class="list">
+    <div>{{edit.username}}</div>
+    <div>{{edit.timestamp.toDate()|date:'dd.MM.yyyy'}}</div>
+  </div>
+</app-card>

src/app/modules/songs/song/edit/history/history.component.less

@@ -0,0 +1,4 @@
+.list {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+}

src/app/modules/songs/song/edit/history/history.component.spec.ts

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

src/app/modules/songs/song/edit/history/history.component.ts

@@ -0,0 +1,31 @@
+import {Component, OnInit} from '@angular/core';
+import {first, map, switchMap} from 'rxjs/operators';
+import {ActivatedRoute} from '@angular/router';
+import {SongService} from '../../../services/song.service';
+import {Song} from '../../../services/song';
+
+@Component({
+  selector: 'app-history',
+  templateUrl: './history.component.html',
+  styleUrls: ['./history.component.less']
+})
+export class HistoryComponent implements OnInit {
+  public song: Song;
+
+  constructor(
+    private activatedRoute: ActivatedRoute,
+    private songService: SongService,
+  ) {
+  }
+
+
+  public ngOnInit(): void {
+    this.activatedRoute.params.pipe(
+      map(param => param.songId),
+      switchMap(songId => this.songService.read$(songId)),
+      first()
+    ).subscribe(song => {
+      this.song = song;
+    });
+  }
+}