feat: group actions (assign/unassign staff) (#1029)

Fixes #1028

src/app/groups/groups-view/groups-view.component.ts

@@ -1,6 +1,13 @@
 /** Angular Imports */
 import { Component } from '@angular/core';
-import { ActivatedRoute } from '@angular/router';
+import { ActivatedRoute, Router } from '@angular/router';
+import { MatDialog } from '@angular/material';
+
+/** Custom Dialogs */
+import { UnassignStaffDialogComponent } from './custom-dialogs/unassign-staff-dialog/unassign-staff-dialog.component';
+
+/** Custom Services */
+import { GroupsService } from '../groups.service';
 
 /**
  * Groups View Component.
@@ -21,11 +28,54 @@ export class GroupsViewComponent {
    * Fetches group data from `resolve`
    * @param {ActivatedRoute} route Activated Route
    */
-  constructor(private route: ActivatedRoute) {
+  constructor(private route: ActivatedRoute,
+              private groupsService: GroupsService,
+              private router: Router,
+              public dialog: MatDialog) {
     this.route.data.subscribe((data: { groupViewData: any, groupDatatables: any }) => {
       this.groupViewData = data.groupViewData;
       this.groupDatatables = data.groupDatatables;
     });
   }
 
+  /**
+   * Performs action button/option action.
+   * @param {string} name action name.
+   */
+  doAction(name: string) {
+    switch (name) {
+      case 'Assign Staff':
+        this.router.navigate([`actions/${name}`], { relativeTo: this.route });
+        break;
+      case 'Unassign Staff':
+        this.unassignStaff();
+        break;
+    }
+  }
+
+  /**
+   * Refetches data for the component
+   * TODO: Replace by a custom reload component instead of hard-coded back-routing.
+   */
+  reload() {
+    const url: string = this.router.url;
+    this.router.navigateByUrl(`/groups`, {skipLocationChange: true})
+      .then(() => this.router.navigate([url]));
+  }
+
+  /**
+   * Unassign's the group's staff.
+   */
+  private unassignStaff() {
+    const unAssignStaffDialogRef = this.dialog.open(UnassignStaffDialogComponent);
+    unAssignStaffDialogRef.afterClosed().subscribe((response: { confirm: any }) => {
+      if (response.confirm) {
+        this.groupsService.executeGroupCommand(this.groupViewData.id, 'unassignStaff', { staffId: this.groupViewData.staffId })
+          .subscribe(() => {
+            this.reload();
+          });
+      }
+    });
+  }
+
 }