Merge pull request #95 from 4Science/pagination

This merge closes #46

package.json

@@ -78,9 +78,9 @@
     "@angular/upgrade": "2.2.3",
     "@angularclass/bootloader": "1.0.1",
     "@angularclass/idle-preload": "1.0.4",
-    "@ng-bootstrap/ng-bootstrap": "1.0.0-alpha.15",
+    "@ng-bootstrap/ng-bootstrap": "1.0.0-alpha.18",
     "@ngrx/core": "^1.2.0",
-    "@ngrx/effects": "^2.0.0",
+    "@ngrx/effects": "2.0.2",
     "@ngrx/router-store": "^1.2.5",
     "@ngrx/store": "^2.2.1",
     "@ngrx/store-devtools": "^3.2.2",
@@ -92,7 +92,7 @@
     "angular2-universal": "2.1.0-rc.1",
     "angular2-universal-polyfills": "2.1.0-rc.1",
     "body-parser": "1.15.2",
-    "bootstrap": "4.0.0-alpha.5",
+    "bootstrap": "4.0.0-alpha.6",
     "cerialize": "^0.1.13",
     "compression": "1.6.2",
     "express": "4.14.0",
@@ -102,6 +102,7 @@
     "jsonschema": "^1.1.1",
     "methods": "1.1.2",
     "morgan": "1.7.0",
+    "ng2-pagination": "^2.0.0",
     "preboot": "4.5.2",
     "reflect-metadata": "^0.1.10",
     "rxjs": "5.0.0-beta.12",

resources/i18n/en.json

@@ -20,6 +20,14 @@
     "home": "Home"
   },
 
+  "pagination": {
+    "results-per-page": "Results Per Page",
+    "showing": {
+      "label" : "Now showing items ",
+      "detail": "{{ range }} of {{ total }}"
+    }
+  },
+
   "title": "DSpace",
 
   "404": {

src/app/app.component.spec.ts

@@ -22,6 +22,7 @@ import { HostWindowResizeAction } from "./shared/host-window.actions";
 import { MockTranslateLoader } from "./shared/testing/mock-translate-loader";
 
 import { GLOBAL_CONFIG, EnvConfig } from '../config';
+import { NativeWindowRef, NativeWindowService } from "./shared/window.service";
 
 let comp: AppComponent;
 let fixture: ComponentFixture<AppComponent>;
@@ -42,6 +43,7 @@ describe('App component', () => {
       declarations: [AppComponent], // declare the test component
       providers: [
         { provide: GLOBAL_CONFIG, useValue: EnvConfig },
+        { provide: NativeWindowService, useValue: new NativeWindowRef() },
         AppComponent
       ],
       schemas: [CUSTOM_ELEMENTS_SCHEMA]

src/app/app.component.ts

@@ -8,9 +8,10 @@ import {
 import { TranslateService } from "@ngx-translate/core";
 import { HostWindowState } from "./shared/host-window.reducer";
 import { Store } from "@ngrx/store";
-import { HostWindowResizeAction } from "./shared/host-window.actions";
 
+import { HostWindowResizeAction } from "./shared/host-window.actions";
 import { EnvConfig, GLOBAL_CONFIG, GlobalConfig } from '../config';
+import { NativeWindowRef, NativeWindowService } from "./shared/window.service";
 
 @Component({
   changeDetection: ChangeDetectionStrategy.Default,
@@ -23,6 +24,7 @@ export class AppComponent implements OnInit {
 
   constructor(
     @Inject(GLOBAL_CONFIG) public EnvConfig: GlobalConfig,
+    @Inject(NativeWindowService) private _window: NativeWindowRef,
     private translate: TranslateService,
     private store: Store<HostWindowState>
   ) {
@@ -33,6 +35,7 @@ export class AppComponent implements OnInit {
   }
 
   ngOnInit() {
+    this.onInit();
     const env: string = EnvConfig.production ? "Production" : "Development";
     const color: string = EnvConfig.production ? "red" : "green";
     console.info(`Environment: %c${env}`,  `color: ${color}; font-weight: bold;`);
@@ -45,4 +48,12 @@ export class AppComponent implements OnInit {
     );
   }
 
+  private onInit(): void {
+    if (typeof this._window !== 'undefined') {
+      this.store.dispatch(
+        new HostWindowResizeAction(this._window.nativeWindow.innerWidth, this._window.nativeWindow.innerHeight)
+      );
+    }
+  }
+
 }

src/app/app.module.ts

@@ -23,7 +23,7 @@ import { PageNotFoundComponent } from './pagenotfound/pagenotfound.component';
     HomeModule,
     ItemPageModule,
     CoreModule.forRoot(),
-    AppRoutingModule,
+    AppRoutingModule
   ],
   providers: [
   ]

src/app/core/cache/models/pagination-options.model.ts

@@ -1,12 +1,20 @@
-export class PaginationOptions {
+import { NgbPaginationConfig } from '@ng-bootstrap/ng-bootstrap';
+
+export class PaginationOptions extends NgbPaginationConfig {
   /**
-   * The number of results per page.
+   * ID for the pagination instance. Only useful if you wish to
+   * have more than once instance at a time in a given component.
    */
-  resultsPerPage: number = 10;
+  id: string;
 
   /**
    * The active page.
    */
   currentPage: number = 1;
 
+  /**
+   * A number array that represents options for a context pagination limit.
+   */
+  pageSizeOptions: Array<number> = [ 5, 10, 20, 40, 60, 80, 100 ];
+
 }

src/app/core/core.module.ts

@@ -1,6 +1,7 @@
 import { NgModule, Optional, SkipSelf, ModuleWithProviders } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { SharedModule } from "../shared/shared.module";
+
 import { isNotEmpty } from "../shared/empty.util";
 import { FooterComponent } from "./footer/footer.component";
 import { DSpaceRESTv2Service } from "./dspace-rest-v2/dspace-rest-v2.service";
@@ -11,6 +12,7 @@ import { ItemDataService } from "./data/item-data.service";
 import { RequestService } from "./data/request.service";
 import { RemoteDataBuildService } from "./cache/builders/remote-data-build.service";
 import { CommunityDataService } from "./data/community-data.service";
+import { PaginationOptions } from "./cache/models/pagination-options.model";
 
 const IMPORTS = [
   CommonModule,
@@ -31,6 +33,7 @@ const PROVIDERS = [
   ItemDataService,
   DSpaceRESTv2Service,
   ObjectCacheService,
+  PaginationOptions,
   ResponseCacheService,
   RequestService,
   RemoteDataBuildService

src/app/header/header.component.html

@@ -1,14 +1,14 @@
 <header>
-  <nav class="navbar navbar-dark bg-inverse">
+  <nav class="navbar navbar-toggleable-sm navbar-inverse bg-inverse">
-    <button class="navbar-toggler hidden-sm-up" type="button" (click)="toggle()" aria-controls="collapsingNav" aria-expanded="false" aria-label="Toggle navigation">
+    <button class="navbar-toggler navbar-toggler-right" type="button" (click)="toggle()" aria-controls="collapsingNav" aria-expanded="false" aria-label="Toggle navigation">
-      <i class="fa fa-bars fa-fw" aria-hidden="true"></i>
+      <span class="navbar-toggler-icon fa fa-bars fa-fw" aria-hidden="true"></span>
     </button>
     <div [ngClass]="{'clearfix': !(isNavBarCollapsed | async)}">
       <a class="navbar-brand" routerLink="/home">
         <!-- TODO: add logo here -->{{ 'title' | translate }}</a>
     </div>
-    <div [ngbCollapse]="(isNavBarCollapsed | async)" class="collapse navbar-toggleable-xs" id="collapsingNav">
+    <div [ngbCollapse]="(isNavBarCollapsed | async)" class="collapse navbar-collapse" id="collapsingNav">
-      <ul class="nav navbar-nav">
+      <ul class="navbar-nav mr-auto">
         <li class="nav-item">
           <a class="nav-link" routerLink="/home" routerLinkActive="active"><i class="fa fa-home fa-fw" aria-hidden="true"></i> {{ 'nav.home' | translate }}<span class="sr-only">(current)</span></a>
         </li>

src/app/header/header.component.scss

@@ -4,10 +4,11 @@ header nav.navbar {
   border-radius: 0rem;
 }
 
-header nav.navbar .navbar-toggler {
-  float: right;
-}
-
 header nav.navbar .navbar-toggler:hover {
   cursor: pointer;
 }
+
+header nav.navbar .navbar-toggler .navbar-toggler-icon {
+  background-image: none !important;
+  line-height: 1.5;
+}

src/app/header/header.component.spec.ts

@@ -58,7 +58,7 @@ describe('HeaderComponent', () => {
     });
 
     it("should close the menu", () => {
-      expect(menu.classList).not.toContain('in');
+      expect(menu.classList).not.toContain('show');
     });
 
   });
@@ -73,7 +73,7 @@ describe('HeaderComponent', () => {
     });
 
     it("should open the menu", () => {
-      expect(menu.classList).toContain('in');
+      expect(menu.classList).toContain('show');
     });
 
   });

src/app/shared/host-window.service.spec.ts

@@ -0,0 +1,191 @@
+import { HostWindowService } from "./host-window.service";
+import { HostWindowState } from "./host-window.reducer";
+import { Observable } from "rxjs";
+import { Store } from "@ngrx/store";
+
+describe("HostWindowService", () => {
+  let service: HostWindowService;
+  let mockStore: any;
+  let store: Store<HostWindowState>;
+
+  describe("", () => {
+    beforeEach(() => {
+      let _initialState = { width: 1600, height: 770 };
+      store = new Store<HostWindowState>(undefined, undefined, Observable.of(_initialState));
+      service = new HostWindowService(store);
+    });
+
+    it("isXs() should return false with width = 1600", () => {
+      service.isXs().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isSm() should return false with width = 1600", () => {
+      service.isSm().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isMd() should return false with width = 1600", () => {
+      service.isMd().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isLg() should return false with width = 1600", () => {
+      service.isLg().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isXl() should return true with width = 1600", () => {
+      service.isXl().subscribe((status) => {
+        expect(status).toBeTruthy();
+      });
+    });
+  });
+
+  describe("", () => {
+    beforeEach(() => {
+      let _initialState = { width: 1100, height: 770 };
+      store = new Store<HostWindowState>(undefined, undefined, Observable.of(_initialState));
+      service = new HostWindowService(store);
+    });
+
+    it("isXs() should return false with width = 1100", () => {
+      service.isXs().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isSm() should return false with width = 1100", () => {
+      service.isSm().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isMd() should return false with width = 1100", () => {
+      service.isMd().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isLg() should return true with width = 1100", () => {
+      service.isLg().subscribe((status) => {
+        expect(status).toBeTruthy();
+      });
+    });
+    it("isXl() should return false with width = 1100", () => {
+      service.isXl().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+  });
+
+  describe("", () => {
+    beforeEach(() => {
+      let _initialState = { width: 800, height: 770 };
+      store = new Store<HostWindowState>(undefined, undefined, Observable.of(_initialState));
+      service = new HostWindowService(store);
+    });
+
+    it("isXs() should return false with width = 800", () => {
+      service.isXs().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isSm() should return false with width = 800", () => {
+      service.isSm().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isMd() should return true with width = 800", () => {
+      service.isMd().subscribe((status) => {
+        expect(status).toBeTruthy();
+      });
+    });
+    it("isLg() should return false with width = 800", () => {
+      service.isLg().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isXl() should return false with width = 800", () => {
+      service.isXl().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+  });
+
+  describe("", () => {
+    beforeEach(() => {
+      let _initialState = { width: 600, height: 770 };
+      store = new Store<HostWindowState>(undefined, undefined, Observable.of(_initialState));
+      service = new HostWindowService(store);
+    });
+
+    it("isXs() should return false with width = 600", () => {
+      service.isXs().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isSm() should return true with width = 600", () => {
+      service.isSm().subscribe((status) => {
+        expect(status).toBeTruthy();
+      });
+    });
+
+    it("isMd() should return false with width = 600", () => {
+      service.isMd().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isLg() should return false with width = 600", () => {
+      service.isLg().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isXl() should return false with width = 600", () => {
+      service.isXl().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+  });
+
+  describe("", () => {
+    beforeEach(() => {
+      let _initialState = { width: 400, height: 770 };
+      store = new Store<HostWindowState>(undefined, undefined, Observable.of(_initialState));
+      service = new HostWindowService(store);
+    });
+
+    it("isXs() should return true with width = 400", () => {
+      service.isXs().subscribe((status) => {
+        expect(status).toBeTruthy();
+      });
+    });
+
+    it("isSm() should return false with width = 400", () => {
+      service.isSm().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+
+    it("isMd() should return false with width = 400", () => {
+      service.isMd().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isLg() should return false with width = 400", () => {
+      service.isLg().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+    it("isXl() should return false with width = 400", () => {
+      service.isXl().subscribe((status) => {
+        expect(status).toBeFalsy();
+      });
+    });
+  });
+
+});

src/app/shared/host-window.service.ts

@@ -0,0 +1,58 @@
+import { HostWindowState } from "./host-window.reducer";
+import { Injectable } from "@angular/core";
+import { Store } from "@ngrx/store";
+import { Observable } from "rxjs/Observable";
+import { hasValue } from "./empty.util";
+
+//TODO ideally we should get these from sass somehow
+export enum GridBreakpoint {
+  XS = 0,
+  SM = 576,
+  MD = 768,
+  LG = 992,
+  XL = 1200
+}
+
+@Injectable()
+export class HostWindowService {
+
+  constructor(
+    private store: Store<HostWindowState>
+  ) {
+  }
+
+  private getWidthObs(): Observable<number> {
+    return this.store.select<number>('hostWindow', 'width')
+      .filter(width => hasValue(width));
+  }
+
+  isXs(): Observable<boolean> {
+    return this.getWidthObs()
+      .map(width => width < GridBreakpoint.SM)
+      .distinctUntilChanged();
+  }
+
+  isSm(): Observable<boolean> {
+    return this.getWidthObs()
+      .map(width => width >= GridBreakpoint.SM && width < GridBreakpoint.MD)
+      .distinctUntilChanged();
+  }
+
+  isMd(): Observable<boolean> {
+    return this.getWidthObs()
+      .map(width => width >= GridBreakpoint.MD && width < GridBreakpoint.LG)
+      .distinctUntilChanged();
+  }
+
+  isLg(): Observable<boolean> {
+    return this.getWidthObs()
+      .map(width => width >= GridBreakpoint.LG && width < GridBreakpoint.XL)
+      .distinctUntilChanged();
+  }
+
+  isXl(): Observable<boolean> {
+    return this.getWidthObs()
+      .map(width => width >= GridBreakpoint.XL)
+      .distinctUntilChanged();
+  }
+}

src/app/shared/pagination/pagination.component.html

@@ -0,0 +1,32 @@
+<div class="pagination-masked clearfix top">
+  <div class="row">
+    <div class="col pagination-info">
+      <span class="align-middle hidden-xs-down">{{ 'pagination.showing.label' | translate }}</span>
+      <span class="align-middle">{{ 'pagination.showing.detail' | translate:showingDetail }}</span>
+    </div>
+    <div class="col">
+      <div ngbDropdown #paginationControls="ngbDropdown" class="d-inline-block float-right">
+        <button class="btn btn-outline-primary" id="paginationControls" (click)="$event.stopPropagation(); (paginationControls.isOpen())?paginationControls.close():paginationControls.open();"><i class="fa fa-cog" aria-hidden="true"></i></button>
+        <div class="dropdown-menu dropdown-menu-right" id="paginationControlsDropdownMenu" aria-labelledby="paginationControls">
+          <h6 class="dropdown-header">{{ 'pagination.results-per-page' | translate}}</h6>
+          <button class="dropdown-item" style="padding-left: 20px" *ngFor="let item of pageSizeOptions " (click)="setPageSize(item)"><i class="fa fa-check {{(item != paginationOptions.pageSize) ? 'invisible' : ''}}" aria-hidden="true"></i> {{item}} </button>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+
+<ng-content></ng-content>
+
+<div class="pagination justify-content-center clearfix bottom">
+  <ngb-pagination [boundaryLinks]="paginationOptions.boundaryLinks"
+                  [collectionSize]="collectionSize"
+                  [disabled]="paginationOptions.disabled"
+                  [ellipses]="paginationOptions.ellipses"
+                  [maxSize]="(isXs)?5:paginationOptions.maxSize"
+                  [(page)]="currentPage"
+                  (pageChange)="doPageChange($event)"
+                  [pageSize]="pageSize"
+                  [rotate]="paginationOptions.rotate"
+                  [size]="(isXs)?'sm':paginationOptions.size"></ngb-pagination>
+</div>

src/app/shared/pagination/pagination.component.spec.ts

@@ -0,0 +1,343 @@
+// ... test imports
+import {
+  async,
+  ComponentFixture,
+  inject,
+  TestBed, fakeAsync, tick
+} from '@angular/core/testing';
+import {
+  Component,
+  CUSTOM_ELEMENTS_SCHEMA,
+  DebugElement
+} from "@angular/core";
+import { ActivatedRoute, Router } from "@angular/router";
+import { By } from '@angular/platform-browser';
+import { Observable } from "rxjs";
+import { RouterTestingModule } from '@angular/router/testing';
+import Spy = jasmine.Spy;
+import { TranslateModule, TranslateLoader } from '@ngx-translate/core';
+import { StoreModule } from "@ngrx/store";
+
+// Load the implementations that should be tested
+import { CommonModule } from '@angular/common';
+
+import { Ng2PaginationModule } from 'ng2-pagination';
+import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
+
+import { PaginationComponent } from './pagination.component';
+import { PaginationOptions } from '../../core/cache/models/pagination-options.model';
+import { MockTranslateLoader } from "../testing/mock-translate-loader";
+
+import { GLOBAL_CONFIG, EnvConfig } from '../../../config';
+import { ActivatedRouteStub, RouterStub } from "../testing/router-stubs";
+import { HostWindowService } from "../host-window.service";
+
+
+function createTestComponent<T>(html: string, type: {new (...args: any[]): T}): ComponentFixture<T> {
+  TestBed.overrideComponent(type, {
+    set: { template: html }
+  });
+  let fixture = TestBed.createComponent(type);
+
+  fixture.detectChanges();
+  return fixture as ComponentFixture<T>;
+}
+
+function expectPages(fixture: ComponentFixture<any>, pagesDef: string[]): void {
+  let de = fixture.debugElement.query(By.css('.pagination'));
+  let pages = de.nativeElement.querySelectorAll('li');
+
+  expect(pages.length).toEqual(pagesDef.length);
+
+  for (let i = 0; i < pagesDef.length; i++) {
+    let pageDef = pagesDef[i];
+    let classIndicator = pageDef.charAt(0);
+
+    if (classIndicator === '+') {
+      expect(pages[i].classList.contains("active")).toBeTruthy();
+      expect(pages[i].classList.contains("disabled")).toBeFalsy();
+      expect(normalizeText(pages[i].textContent)).toEqual(pageDef.substr(1));
+    } else if (classIndicator === '-') {
+      expect(pages[i].classList.contains("active")).toBeFalsy();
+      expect(pages[i].classList.contains("disabled")).toBeTruthy();
+      expect(normalizeText(pages[i].textContent)).toEqual(pageDef.substr(1));
+      if (normalizeText(pages[i].textContent) !== '...') {
+        expect(pages[i].querySelector('a').getAttribute('tabindex')).toEqual('-1');
+      }
+    } else {
+      expect(pages[i].classList.contains("active")).toBeFalsy();
+      expect(pages[i].classList.contains("disabled")).toBeFalsy();
+      expect(normalizeText(pages[i].textContent)).toEqual(pageDef);
+      if (normalizeText(pages[i].textContent) !== '...') {
+        expect(pages[i].querySelector('a').hasAttribute('tabindex')).toBeFalsy();
+      }
+    }
+  }
+}
+
+function changePageSize(fixture: ComponentFixture<any>, pageSize: string): void {
+  let buttonEl = fixture.nativeElement.querySelector('#paginationControls');
+  let activatedRouteStub: ActivatedRouteStub;
+  let routerStub: RouterStub;
+
+  buttonEl.click();
+
+  let dropdownMenu = fixture.debugElement.query(By.css('#paginationControlsDropdownMenu'));
+  let buttons = dropdownMenu.nativeElement.querySelectorAll('button');
+
+  for (let i = 0; i < buttons.length; i++) {
+    if (buttons[i].textContent.trim() == pageSize) {
+      buttons[i].click();
+      fixture.detectChanges();
+      break;
+    }
+  }
+}
+
+function changePage(fixture: ComponentFixture<any>, idx: number): void {
+  let de = fixture.debugElement.query(By.css('.pagination'));
+  let buttons = de.nativeElement.querySelectorAll('li');
+
+  buttons[idx].querySelector('a').click();
+  fixture.detectChanges();
+}
+
+function normalizeText(txt: string): string {
+  return txt.trim().replace(/\s+/g, ' ');
+}
+
+describe('Pagination component', () => {
+
+  let fixture: ComponentFixture<PaginationComponent>;
+  let comp: PaginationComponent;
+  let testComp: TestComponent;
+  let testFixture: ComponentFixture<TestComponent>;
+  let de: DebugElement;
+  let html;
+  let hostWindowServiceStub: HostWindowServiceStub;
+
+  let activatedRouteStub: ActivatedRouteStub;
+  let routerStub: RouterStub;
+
+  //Define initial state and test state
+  let _initialState = { width: 1600, height: 770 };
+
+  // async beforeEach
+  beforeEach(async(() => {
+    activatedRouteStub = new ActivatedRouteStub();
+    routerStub = new RouterStub();
+    hostWindowServiceStub = new HostWindowServiceStub(_initialState.width);
+
+    TestBed.configureTestingModule({
+      imports: [CommonModule, StoreModule.provideStore({}), TranslateModule.forRoot({
+        loader: {
+          provide: TranslateLoader,
+          useClass: MockTranslateLoader
+        }
+      }), Ng2PaginationModule, NgbModule.forRoot(),
+        RouterTestingModule.withRoutes([
+          {path: 'home', component: TestComponent}
+        ])],
+      declarations: [PaginationComponent, TestComponent], // declare the test component
+      providers: [
+        { provide: ActivatedRoute, useValue: activatedRouteStub },
+        { provide: GLOBAL_CONFIG, useValue: EnvConfig },
+        { provide: Router, useValue: routerStub },
+        { provide: HostWindowService, useValue: hostWindowServiceStub },
+        PaginationComponent
+      ],
+      schemas: [CUSTOM_ELEMENTS_SCHEMA]
+    });
+
+  }));
+
+  // synchronous beforeEach
+  beforeEach(() => {
+    html = `
+    <ds-pagination #p="paginationComponent"
+                   [paginationOptions]="paginationOptions" 
+                   [collectionSize]="collectionSize" 
+                   (pageChange)="pageChanged($event)"
+                   (pageSizeChange)="pageSizeChanged($event)">
+      <ul>
+        <li *ngFor="let item of collection | paginate: { itemsPerPage: paginationOptions.pageSize, 
+                    currentPage: paginationOptions.currentPage, totalItems: collectionSize }"> {{item}} </li>
+      </ul>
+    </ds-pagination>`;
+
+    testFixture = createTestComponent(html, TestComponent) as ComponentFixture<TestComponent>;
+    testComp = testFixture.componentInstance;
+
+  });
+
+  it('should create Pagination Component', inject([PaginationComponent], (app: PaginationComponent) => {
+    expect(app).toBeDefined();
+  }));
+
+  it('should render', () => {
+    expect(testComp.paginationOptions.id).toEqual('test');
+    expect(testComp.paginationOptions.currentPage).toEqual(1);
+    expect(testComp.paginationOptions.pageSize).toEqual(10);
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '» Next']);
+  });
+
+  it('should render and respond to page change', () => {
+    testComp.collectionSize = 30;
+
+    changePage(testFixture, 3);
+    expectPages(testFixture, ['« Previous', '1', '2', '+3', '-» Next']);
+
+    changePage(testFixture, 0);
+    expectPages(testFixture, ['« Previous', '1', '+2', '3', '» Next']);
+  });
+
+  it('should render and respond to collectionSize change', () => {
+
+    testComp.collectionSize = 30;
+    testFixture.detectChanges();
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '» Next']);
+
+    testComp.collectionSize = 40;
+    testFixture.detectChanges();
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '4', '» Next']);
+  });
+
+  it('should render and respond to pageSize change', () => {
+
+    testComp.collectionSize = 30;
+    testFixture.detectChanges();
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '» Next']);
+
+    changePageSize(testFixture, '5');
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '4', '5', '6', '» Next']);
+
+    changePageSize(testFixture, '10');
+    expectPages(testFixture, ['-« Previous', '+1', '2', '3', '» Next']);
+
+    changePageSize(testFixture, '20');
+    expectPages(testFixture, ['-« Previous', '+1', '2', '» Next']);
+  });
+
+  it('should emit pageChange event with correct value', fakeAsync(() => {
+
+    spyOn(testComp, 'pageChanged');
+
+    changePage(testFixture, 3);
+    tick();
+
+    expect(testComp.pageChanged).toHaveBeenCalledWith(3);
+  }));
+
+  it('should emit pageSizeChange event with correct value', fakeAsync(() => {
+
+    spyOn(testComp, 'pageSizeChanged');
+
+    changePageSize(testFixture, '5');
+    tick();
+
+    expect(testComp.pageSizeChanged).toHaveBeenCalledWith(5);
+  }));
+
+  it('should set correct route parameters', fakeAsync(() => {
+    let paginationComponent: PaginationComponent = testFixture
+      .debugElement.query(By.css('ds-pagination')).references['p'];
+    routerStub = testFixture.debugElement.injector.get(Router);
+
+    testComp.collectionSize = 60;
+
+    changePage(testFixture, 3);
+    tick();
+    expect(routerStub.navigate).toHaveBeenCalledWith([{pageId: 'test', page: 3, pageSize: 10}]);
+    expect(paginationComponent.currentPage).toEqual(3);
+
+    changePageSize(testFixture, '20');
+    tick();
+    expect(routerStub.navigate).toHaveBeenCalledWith([{pageId: 'test', page: 3, pageSize: 20}]);
+    expect(paginationComponent.pageSize).toEqual(20);
+  }));
+
+  it('should get parameters from route', () => {
+
+    activatedRouteStub = testFixture.debugElement.injector.get(ActivatedRoute);
+    activatedRouteStub.testParams = {
+      pageId: 'test',
+      page: 2,
+      pageSize: 20
+    };
+
+    testFixture.detectChanges();
+
+    expectPages(testFixture, ['« Previous', '1', '+2', '3', '4', '5', '» Next']);
+    expect(testComp.paginationOptions.currentPage).toEqual(2);
+    expect(testComp.paginationOptions.pageSize).toEqual(20);
+
+    activatedRouteStub.testParams = {
+      pageId: 'test',
+      page: 3,
+      pageSize: 40
+    };
+
+    testFixture.detectChanges();
+
+    expectPages(testFixture, ['« Previous', '1', '2', '+3', '-» Next']);
+    expect(testComp.paginationOptions.currentPage).toEqual(3);
+    expect(testComp.paginationOptions.pageSize).toEqual(40);
+  });
+
+  it('should respond to windows resize', () => {
+    let paginationComponent: PaginationComponent = testFixture
+      .debugElement.query(By.css('ds-pagination')).references['p'];
+    hostWindowServiceStub = testFixture.debugElement.injector.get(HostWindowService);
+
+    hostWindowServiceStub.setWidth(400);
+
+    hostWindowServiceStub.isXs().subscribe((status) => {
+      paginationComponent.isXs = status;
+      testFixture.detectChanges();
+      expectPages(testFixture, ['-« Previous', '+1', '2', '3', '4', '5', '-...', '10', '» Next']);
+      de = testFixture.debugElement.query(By.css('ul.pagination'));
+      expect(de.nativeElement.classList.contains("pagination-sm")).toBeTruthy();
+    });
+  });
+});
+
+// declare a test component
+@Component({selector: 'ds-test-cmp', template: ''})
+class TestComponent {
+
+  collection: string[] = [];
+  collectionSize: number;
+  paginationOptions = new PaginationOptions();
+
+  constructor() {
+    this.collection = Array.from(new Array(100), (x, i) => `item ${i + 1}`);
+    this.collectionSize = 100;
+    this.paginationOptions.id = 'test';
+  }
+
+  pageChanged(page) {
+    this.paginationOptions.currentPage = page;
+  }
+
+  pageSizeChanged(pageSize) {
+    this.paginationOptions.pageSize = pageSize;
+  }
+}
+
+// declare a stub service
+class HostWindowServiceStub {
+
+  private width: number;
+
+  constructor(width) {
+    this.setWidth(width);
+  }
+
+  setWidth(width) {
+    this.width = width;
+  }
+
+  isXs(): Observable<boolean> {
+    return Observable.of(this.width < 576);
+  }
+}

src/app/shared/pagination/pagination.component.ts

@@ -0,0 +1,241 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  EventEmitter,
+  Input,
+  OnDestroy,
+  OnInit,
+  Output,
+  ViewEncapsulation
+} from '@angular/core'
+import { ActivatedRoute, Router } from '@angular/router';
+import { isNumeric } from "rxjs/util/isNumeric";
+import 'rxjs/add/operator/switchMap';
+import { Observable } from "rxjs";
+// It is necessary to use ng2-pagination
+import { DEFAULT_TEMPLATE, DEFAULT_STYLES } from 'ng2-pagination/dist/template';
+
+import { HostWindowService } from "../host-window.service";
+import { HostWindowState } from "../host-window.reducer";
+import { PaginationOptions } from '../../core/cache/models/pagination-options.model';
+
+/**
+ * The default pagination controls component.
+ */
+@Component({
+  exportAs: 'paginationComponent',
+  selector: 'ds-pagination',
+  templateUrl: 'pagination.component.html',
+  changeDetection: ChangeDetectionStrategy.Default,
+  encapsulation: ViewEncapsulation.Emulated
+})
+export class PaginationComponent implements OnDestroy, OnInit {
+
+  /**
+   * Number of items in collection.
+   */
+  @Input() collectionSize: number;
+
+  /**
+   * Configuration for the NgbPagination component.
+   */
+  @Input() paginationOptions: PaginationOptions;
+
+  /**
+   * An event fired when the page is changed.
+   * Event's payload equals to the newly selected page.
+   */
+  @Output() pageChange: EventEmitter<number> = new EventEmitter<number>();
+
+  /**
+   * An event fired when the page size is changed.
+   * Event's payload equals to the newly selected page size.
+   */
+  @Output() pageSizeChange: EventEmitter<number> = new EventEmitter<number>();
+
+  /**
+   * Current page.
+   */
+  public currentPage = 1;
+
+  /**
+   * An observable of HostWindowState type
+   */
+  public hostWindow: Observable<HostWindowState>;
+
+  /**
+   * ID for the pagination instance. Only useful if you wish to
+   * have more than once instance at a time in a given component.
+   */
+  private id: string;
+
+  /**
+   * A boolean that indicate if is an extra small devices viewport.
+   */
+  public isXs: boolean;
+
+  /**
+   * Number of items per page.
+   */
+  public pageSize: number = 10;
+
+  /**
+   * A number array that represents options for a context pagination limit.
+   */
+  private pageSizeOptions: Array<number>;
+
+  /**
+   * Local variable, which can be used in the template to access the paginate controls ngbDropdown methods and properties
+   */
+  public paginationControls;
+
+  /**
+   * Subscriber to observable.
+   */
+  private routeSubscription: any;
+
+  /**
+   * An object that represents pagination details of the current viewed page
+   */
+  public showingDetail: any = {
+    range: null,
+    total: null
+  };
+
+  /**
+   * Subscriber to observable.
+   */
+  private stateSubscription: any;
+
+  /**
+   * Method provided by Angular. Invoked after the constructor.
+   */
+  ngOnInit() {
+    this.stateSubscription = this.hostWindowService.isXs()
+      .subscribe((status: boolean) => {
+        this.isXs = status;
+      });
+    this.checkConfig(this.paginationOptions);
+    this.id = this.paginationOptions.id || null;
+    this.currentPage = this.paginationOptions.currentPage;
+    this.pageSize = this.paginationOptions.pageSize;
+    this.pageSizeOptions = this.paginationOptions.pageSizeOptions;
+
+    this.routeSubscription = this.route.params
+      .map(params => params)
+      .subscribe(params => {
+        if(this.id == params['pageId']
+           && (this.paginationOptions.currentPage != params['page']
+           || this.paginationOptions.pageSize != params['pageSize'])
+          ) {
+          this.validateParams(params['page'], params['pageSize']);
+        }
+      });
+    this.setShowingDetail();
+  }
+
+  /**
+   * Method provided by Angular. Invoked when the instance is destroyed.
+   */
+  ngOnDestroy() {
+    this.stateSubscription.unsubscribe();
+    this.routeSubscription.unsubscribe();
+  }
+
+  /**
+   * @param route
+   *    Route is a singleton service provided by Angular.
+   * @param router
+   *    Router is a singleton service provided by Angular.
+   */
+  constructor(
+    private route: ActivatedRoute,
+    private router: Router,
+    public hostWindowService: HostWindowService
+  ){
+  }
+
+  /**
+   * Method to set set new page and update route parameters
+   *
+   * @param page
+   *    The page being navigated to.
+   */
+  public doPageChange(page: number) {
+    this.router.navigate([{ pageId: this.id, page: page, pageSize: this.pageSize }]);
+    this.currentPage = page;
+    this.setShowingDetail();
+    this.pageChange.emit(page);
+  }
+
+  /**
+   * Method to set set new page size and update route parameters
+   *
+   * @param pageSize
+   *    The new page size.
+   */
+  public setPageSize(pageSize: number) {
+    this.router.navigate([{ pageId: this.id, page: this.currentPage, pageSize: pageSize }]);
+    this.pageSize = pageSize;
+    this.setShowingDetail();
+    this.pageSizeChange.emit(pageSize);
+  }
+
+  /**
+   * Method to set pagination details of the current viewed page.
+   */
+  private setShowingDetail() {
+    let firstItem;
+    let lastItem;
+    let lastPage = Math.round(this.collectionSize / this.pageSize);
+
+    firstItem = this.pageSize * (this.currentPage - 1) + 1;
+    if (this.currentPage != lastPage) {
+      lastItem = this.pageSize * this.currentPage;
+    } else {
+      lastItem = this.collectionSize;
+    }
+    this.showingDetail = {
+      range: firstItem + ' - ' + lastItem,
+      total: this.collectionSize
+    }
+  }
+
+  /**
+   * Validate query params
+   *
+   * @param page
+   *    The page number to validate
+   * @param pageSize
+   *    The page size to validate
+   */
+  private validateParams(page: any, pageSize: any) {
+    let filteredPageSize = this.pageSizeOptions.find(x => x == pageSize);
+    if (!isNumeric(page) || !filteredPageSize) {
+      let filteredPage = isNumeric(page) ? page : this.currentPage;
+      filteredPageSize = (filteredPageSize) ? filteredPageSize : this.pageSize;
+      this.router.navigate([{ pageId: this.id, page: filteredPage, pageSize: filteredPageSize }]);
+    } else {
+      // (+) converts string to a number
+      this.currentPage = +page;
+      this.pageSize = +pageSize;
+      this.pageChange.emit(this.currentPage);
+      this.pageSizeChange.emit(this.pageSize);
+    }
+  }
+
+  /**
+   * Ensure options passed contains the required properties.
+   *
+   * @param paginateOptions
+   *    The paginate options object.
+   */
+  private checkConfig(paginateOptions: any) {
+    let required = ['id', 'currentPage', 'pageSize', 'pageSizeOptions'];
+    let missing = required.filter(function (prop) { return !(prop in paginateOptions); });
+    if (0 < missing.length) {
+      throw new Error("Paginate: Argument is missing the following required properties: " + missing.join(', '));
+    }
+  }
+}
+

src/app/shared/shared.module.ts

@@ -3,13 +3,17 @@ import { CommonModule } from '@angular/common';
 import { RouterModule } from '@angular/router';
 import { FormsModule, ReactiveFormsModule } from '@angular/forms';
 
+import { Ng2PaginationModule } from 'ng2-pagination';
 import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
 import { TranslateModule } from '@ngx-translate/core';
 
 import { ApiService } from './api.service';
+import { PaginationComponent } from "./pagination/pagination.component";
 import { FileSizePipe } from "./utils/file-size-pipe";
 import { ThumbnailComponent } from "../thumbnail/thumbnail.component";
 import { SafeUrlPipe } from "./utils/safe-url-pipe";
+import { HostWindowService } from "./host-window.service";
+import { NativeWindowFactory, NativeWindowService } from "./window.service";
 
 const MODULES = [
   // Do NOT include UniversalModule, HttpModule, or JsonpModule here
@@ -18,6 +22,7 @@ const MODULES = [
   TranslateModule,
   FormsModule,
   ReactiveFormsModule,
+  Ng2PaginationModule,
   NgbModule
 ];
 
@@ -28,12 +33,15 @@ const PIPES = [
 ];
 
 const COMPONENTS = [
-  ThumbnailComponent
   // put shared components here
+  PaginationComponent,
+  ThumbnailComponent
 ];
 
 const PROVIDERS = [
-  ApiService
+  ApiService,
+  HostWindowService,
+  { provide: NativeWindowService, useFactory: NativeWindowFactory }
 ];
 
 @NgModule({
@@ -48,6 +56,9 @@ const PROVIDERS = [
     ...MODULES,
     ...PIPES,
     ...COMPONENTS
+  ],
+  providers: [
+    ...PROVIDERS
   ]
 })
 export class SharedModule {

src/app/shared/testing/mock-store.ts

@@ -0,0 +1,28 @@
+import { Action } from '@ngrx/store';
+import { Observable } from 'rxjs/Observable';
+import { BehaviorSubject } from 'rxjs/BehaviorSubject';
+
+export class MockStore<T> extends BehaviorSubject<T> {
+
+  constructor(private _initialState: T) {
+    super(_initialState);
+  }
+
+  dispatch = (action: Action): void => {
+  }
+
+  select = <R>(pathOrMapFn: any): Observable<T> => {
+    return Observable.of(this.getValue());
+  }
+
+  nextState(_newState: T) {
+    this.next(_newState);
+  }
+
+}
+
+export class MockAction implements Action {
+  type = null;
+  payload: {};
+
+}

src/app/shared/testing/router-stubs.ts

@@ -0,0 +1,36 @@
+import { Params } from "@angular/router";
+import { BehaviorSubject } from "rxjs";
+
+export class RouterStub {
+  //noinspection TypeScriptUnresolvedFunction
+  navigate = jasmine.createSpy('navigate');
+  //navigate1: jasmine.createSpy('navigate');
+}
+
+export class ActivatedRouteStub {
+
+  // ActivatedRoute.params is Observable
+  private subject = new BehaviorSubject(this.testParams);
+  params = this.subject.asObservable();
+
+  constructor(params?: Params) {
+    if (params) {
+      this.testParams = params;
+    } else {
+      this.testParams = {};
+    }
+  }
+
+  // Test parameters
+  private _testParams: {};
+  get testParams() { return this._testParams; }
+  set testParams(params: {}) {
+    this._testParams = params;
+    this.subject.next(params);
+  }
+
+  // ActivatedRoute.snapshot.params
+  get snapshot() {
+    return { params: this.testParams };
+  }
+}

src/app/shared/window.service.ts

@@ -0,0 +1,18 @@
+import { OpaqueToken } from '@angular/core';
+
+export const NativeWindowService = new OpaqueToken('NativeWindowService');
+
+export class NativeWindowRef {
+  get nativeWindow (): any {
+    if (typeof window !== 'undefined') {
+      return window;
+    } else {
+      return false;
+    }
+  }
+}
+
+export function NativeWindowFactory() {
+  return new NativeWindowRef();
+}
+