Added dates to table and date Sorting

src/app/services/sorting.service.ts

@@ -8,6 +8,10 @@ export function sortByStringAscending<T>(items: T[], key: (T) => string) {
   return items.sort((a, b) => key(a).localeCompare(key(b)));
 }
 
+export function sortByDateAscending<T>(items: T[], key: (T) => Date) {
+  return items.sort((a, b) =>  <any>key(b) - <any>key(a));
+}
+
 export function getNumberForPriority(priority: Priority): number {
   switch (priority) {
     case Priority.High:

src/app/services/table-component.base.ts

@@ -1,4 +1,4 @@
-import {sortByNumberAscending, sortByStringAscending} from './sorting.service';
+import {sortByNumberAscending, sortByStringAscending, sortByDateAscending} from './sorting.service';
 import {Priority} from './backend.service';
 
 export abstract class TableComponentBase<T> {
@@ -32,6 +32,19 @@ export abstract class TableComponentBase<T> {
     }
   }
 
+  protected doDateSort(by: string, key: (item: T) => Date) {
+    if (this.sortBy === by) {
+      this.sortDescending = !this.sortDescending;
+    } else {
+      this.sortBy = by;
+    }
+
+    this.items = sortByDateAscending(this.items, key);
+    if (this.sortDescending) {
+      this.items = this.items.reverse();
+    }
+  }
+
   public getAllPriorities(): string[] {
     return Object.values(Priority);
   }