Added ability to generate RSS feed URLs from the UI

Moved property sorting into its own component

src/app/components/sort-property/sort-property.component.ts

@@ -0,0 +1,54 @@
+import { Component, Input, EventEmitter, Output } from '@angular/core';
+import { Sort } from 'api-types';
+
+@Component({
+  selector: 'app-sort-property',
+  templateUrl: './sort-property.component.html',
+  styleUrls: ['./sort-property.component.scss']
+})
+export class SortPropertyComponent {
+  sortProperties = {
+    'registered': {
+      'key': 'registered',
+      'label': $localize`Download Date`
+    },
+    'upload_date': {
+      'key': 'upload_date',
+      'label': $localize`Upload Date`
+    },
+    'title': {
+      'key': 'title',
+      'label': $localize`Name`
+    },
+    'size': {
+      'key': 'size',
+      'label': $localize`File Size`
+    },
+    'duration': {
+      'key': 'duration',
+      'label': $localize`Duration`
+    }
+  };
+  
+  @Input() sortProperty = 'registered';
+  @Input() descendingMode = true;
+
+  @Output() sortPropertyChange = new EventEmitter<unknown>();
+  @Output() descendingModeChange = new EventEmitter<number>();
+  @Output() sortOptionChanged = new EventEmitter<Sort>();
+
+  toggleModeChange(): void {
+    this.descendingMode = !this.descendingMode;
+    this.emitSortOptionChanged();
+  }
+
+  emitSortOptionChanged(): void {
+    if (!this.sortProperty || !this.sortProperties[this.sortProperty]) {
+      return;
+    }
+    this.sortOptionChanged.emit({
+      by: this.sortProperty,
+      order: this.descendingMode ? -1 : 1
+    });
+  }
+}