feat: add support for runtime server url changes (#1271)

Fixes: #786
Fixes: #1229

src/app/shared/server-selector/server-selector.component.html

@@ -0,0 +1,8 @@
+<mat-form-field id="server-selector">
+  <mat-label>Server</mat-label>
+  <mat-select [formControl]="serverSelector">
+    <mat-option *ngFor="let server of servers" [value]="server">
+      {{ server }}
+    </mat-option>
+  </mat-select>
+</mat-form-field>

src/app/shared/server-selector/server-selector.component.spec.ts

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

src/app/shared/server-selector/server-selector.component.ts

@@ -0,0 +1,45 @@
+/** Angular Imports */
+import { Component, OnInit } from '@angular/core';
+import { FormControl } from '@angular/forms';
+
+/** Custom Services */
+import { SettingsService } from 'app/settings/settings.service';
+
+/**
+ * Server Selector Component
+ */
+@Component({
+  selector: 'mifosx-server-selector',
+  templateUrl: './server-selector.component.html',
+  styleUrls: ['./server-selector.component.scss']
+})
+export class ServerSelectorComponent implements OnInit {
+
+  /** Server Settings. */
+  servers: string[];
+
+  /** Server Setting */
+  serverSelector =  new FormControl('');
+
+  /**
+   * @param {SettingsService} settingsService Settings Service
+   */
+  constructor(private settingsService: SettingsService) { }
+
+  ngOnInit(): void {
+    this.servers = this.settingsService.servers;
+    this.serverSelector.patchValue(this.settingsService.server);
+    this.buildDependencies();
+  }
+
+  /**
+   * Subscribe to value changes.
+   */
+  buildDependencies() {
+    this.serverSelector.valueChanges.subscribe((url: string) => {
+      this.settingsService.setServer(url);
+      window.location.reload(); // refreshes the environment.ts.
+    });
+  }
+
+}