Added support for modifying downloaded files

src/app/file-card/file-card.component.ts

@@ -0,0 +1,48 @@
+import { Component, OnInit, Input } from '@angular/core';
+import {PostsService} from '../posts.services';
+import {MatSnackBar} from '@angular/material';
+import {AppComponent} from '../app.component';
+
+@Component({
+  selector: 'app-file-card',
+  templateUrl: './file-card.component.html',
+  styleUrls: ['./file-card.component.css']
+})
+export class FileCardComponent implements OnInit {
+
+  @Input() title:string;
+  @Input() length:string;
+  @Input() name:string;
+  @Input() thumbnailURL: string;
+  @Input() isAudio: boolean = true;
+
+  constructor(private postsService: PostsService, public snackBar: MatSnackBar, private appComponent: AppComponent) { }
+
+  ngOnInit() {
+  }
+
+  deleteFile()
+  {
+    this.postsService.deleteFile(this.name, this.isAudio).subscribe(result => {
+      if (result == true)
+      {
+        this.openSnackBar("Delete success!", "OK.");
+        if (this.isAudio)
+          this.appComponent.removeFromMp3(name);
+        else
+          this.appComponent.removeFromMp4(name);
+      }
+      else
+      {
+        this.openSnackBar("Delete failed!", "OK.");
+      }
+    });
+  }
+
+  public openSnackBar(message: string, action: string) {
+    this.snackBar.open(message, action, {
+      duration: 2000,
+    });
+  }
+
+}