refractor: login module (#283)

* Refractor components.
* Shift language and footer component to shared module.
* Replace mat-icons by font-awesome icons.
* Add comments.

Fixes #284

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

@@ -0,0 +1,8 @@
+<mat-form-field id="language-selector">
+  <mat-label>Language</mat-label>
+  <mat-select [formControl]="languageSelector">
+    <mat-option *ngFor="let language of languages" [value]="language">
+      {{ language }}
+    </mat-option>
+  </mat-select>
+</mat-form-field>

src/app/shared/language-selector/language-selector.component.scss

@@ -0,0 +1,3 @@
+#language-selector {
+  max-width: 4rem;
+}

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

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

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

@@ -0,0 +1,59 @@
+/** Angular Imports */
+import { Component, OnInit } from '@angular/core';
+import { FormControl } from '@angular/forms';
+
+/** Custom Services */
+import { I18nService } from 'app/core';
+
+/**
+ * Language selector component.
+ *
+ * TODO: Decision to be taken on using ngx-translate or angular-internationalization
+ *       to provide language support in the application.
+ */
+@Component({
+  selector: 'mifosx-language-selector',
+  templateUrl: './language-selector.component.html',
+  styleUrls: ['./language-selector.component.scss']
+})
+export class LanguageSelectorComponent implements OnInit {
+
+  /** Language selector form control. */
+  languageSelector = new FormControl();
+
+  /**
+   * Sets the language of the application in the selector on initial setup.
+   * @param {I18nService} i18nService Internationalization Service.
+   */
+  constructor(private i18nService: I18nService) {
+    this.languageSelector.setValue(this.currentLanguage);
+  }
+
+  ngOnInit() {
+  }
+
+  /**
+   * Sets a new language to be used by the application.
+   * @param {string} language New language.
+   */
+  setLanguage(language: string) {
+    this.i18nService.language = language;
+  }
+
+  /**
+   * Returns the current language used by the application.
+   * @returns {string} Current language.
+   */
+  get currentLanguage(): string {
+    return this.i18nService.language;
+  }
+
+  /**
+   * Returns all the languages supported by the application.
+   * @return {string[]} Supported languages.
+   */
+  get languages(): string[] {
+    return this.i18nService.supportedLanguages;
+  }
+
+}