Support for loading, deleting, tag joining, and

src/app/app.component.html

@@ -2,4 +2,8 @@
   <mat-toolbar-row>
     <span>Material Comments</span>
   </mat-toolbar-row>
-</mat-toolbar>
+</mat-toolbar>
+
+<div class="app-body">
+  <app-comments-list></app-comments-list>
+</div>

src/app/app.component.scss

@@ -0,0 +1,5 @@
+.app-body {
+  display: flex;
+  justify-content: center;
+  margin-top: 1rem;
+}

src/app/app.module.ts

@@ -4,22 +4,37 @@ import { EffectsModule } from '@ngrx/effects';
 import { NgModule } from '@angular/core';
 import { StoreModule } from '@ngrx/store';
 
+import { MatToolbarModule } from '@angular/material/toolbar';
+import { MatCardModule } from '@angular/material/card';
+import { MatButtonModule } from '@angular/material/button';
+import { MatIconModule } from '@angular/material/icon';
+
 import { AppComponent } from './app.component';
 import { reducers, metaReducers } from './reducers';
+import { CommentStoreModule } from './store';
 import { CommentCardComponent } from './comment-card/comment-card.component';
+import { CommentsListComponent } from './comments-list/comments-list.component';
+import { PipesModule } from './pipes/pipes.module';
 
 @NgModule({
   declarations: [
-    AppComponent
+    AppComponent,
+    CommentCardComponent,
+    CommentsListComponent
   ],
   imports: [
     BrowserModule,
+    BrowserAnimationsModule,
     StoreModule.forRoot(reducers, {
       metaReducers
     }),
     EffectsModule.forRoot([]),
-    BrowserAnimationsModule,
-    MatToolbarModule
+    CommentStoreModule,
+    MatToolbarModule,
+    MatCardModule,
+    MatButtonModule,
+    MatIconModule,
+    PipesModule
   ],
   providers: [],
   bootstrap: [AppComponent]

src/app/comment-card/comment-card.component.html

@@ -0,0 +1,17 @@
+<mat-card class="comment-card">
+  <mat-card-header>
+    <mat-card-title>{{ data.title }}</mat-card-title>
+    <mat-card-subtitle>{{ data.tags | join }}</mat-card-subtitle>
+  </mat-card-header>
+  <mat-card-content>
+    <div [innerHTML]="data.text | safeHTML"></div>
+  </mat-card-content>
+  <mat-card-actions align="end">
+    <button mat-icon-button color="primary" (click)="toggleEdit()">
+      <mat-icon>edit</mat-icon>
+    </button>
+    <button mat-icon-button color="warn" (click)="delete()">
+      <mat-icon>delete</mat-icon>
+    </button>
+  </mat-card-actions>
+</mat-card>

src/app/comment-card/comment-card.component.scss

@@ -0,0 +1,11 @@
+:host {
+  display: block;
+}
+
+:host:not(:first-of-type) {
+  margin-top: 1rem;
+}
+
+.comment-card {
+  max-width: 420px;
+}

src/app/comment-card/comment-card.component.spec.ts

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

src/app/comment-card/comment-card.component.ts

@@ -0,0 +1,25 @@
+import { Component, Input } from '@angular/core';
+
+import { CommentFacade, Comment } from '../store/comment';
+
+@Component({
+  selector: 'app-comment-card',
+  templateUrl: './comment-card.component.html',
+  styleUrls: ['./comment-card.component.scss']
+})
+export class CommentCardComponent {
+  @Input() data: Comment;
+
+  constructor(
+    private readonly commentFacade: CommentFacade
+  ) { }
+
+  toggleEdit(): void {
+    // todo
+  }
+
+  delete(): void {
+    this.commentFacade.delete(this.data.id);
+  }
+
+}

src/app/comments-list/comments-list.component.html

@@ -0,0 +1,9 @@
+<section class="comment-list" *ngIf="list$ | async as list; else loading;">
+  <ng-container *ngFor="let item of list">
+    <app-comment-card [data]="item"></app-comment-card>
+  </ng-container>
+</section>
+
+<ng-template #loading>
+  <p>Loading...</p>
+</ng-template>

src/app/comments-list/comments-list.component.spec.ts

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

src/app/comments-list/comments-list.component.ts

@@ -0,0 +1,23 @@
+import { Component, OnInit } from '@angular/core';
+
+import { CommentFacade } from '../store/comment';
+
+@Component({
+  selector: 'app-comments-list',
+  templateUrl: './comments-list.component.html',
+  styleUrls: ['./comments-list.component.scss']
+})
+export class CommentsListComponent implements OnInit {
+  list$ = this.commentFacade.list$;
+
+  constructor(
+    private readonly commentFacade: CommentFacade
+  ) { }
+
+  ngOnInit(): void {
+    // load comments, typically would do this with an effect watching the route,
+    // but for simplicity I'm just calling it here.
+    this.commentFacade.getAll();
+  }
+
+}

src/app/pipes/join.pipe.spec.ts

@@ -0,0 +1,23 @@
+import { JoinPipe } from './join.pipe';
+
+describe('JoinPipe', () => {
+  let pipe: JoinPipe;
+
+  beforeEach(() => {
+    pipe = new JoinPipe();
+  });
+
+  it('create an instance', () => {
+    expect(pipe).toBeTruthy();
+  });
+
+  it('should transform array into string with \',\' separator', () => {
+    const array = ['one', 'two', 'three', 'four'];
+    expect(pipe.transform(array)).toBe('one, two, three, four');
+  });
+
+  it('should transform array into string with \'::\' separator', () => {
+    const array = ['one', 'two', 'three', 'four'];
+    expect(pipe.transform(array, '::')).toBe('one::two::three::four');
+  });
+});

src/app/pipes/join.pipe.ts

@@ -0,0 +1,12 @@
+import { Pipe, PipeTransform } from '@angular/core';
+
+@Pipe({
+  name: 'join'
+})
+export class JoinPipe implements PipeTransform {
+
+  transform(value: any[], separator = ', '): any {
+    return Array.isArray(value) ? value.join(separator) : value;
+  }
+
+}

src/app/pipes/pipes.module.ts

@@ -0,0 +1,22 @@
+import { NgModule } from '@angular/core';
+
+import { JoinPipe } from './join.pipe';
+import { SafeHTMLPipe } from './safehtml.pipe';
+
+const exportedPipes = [
+  JoinPipe,
+  SafeHTMLPipe
+];
+
+@NgModule({
+  declarations: [
+    ...exportedPipes,
+  ],
+  providers: [
+    ...exportedPipes
+  ],
+  exports: [
+    ...exportedPipes
+  ]
+})
+export class PipesModule { }

src/app/pipes/safehtml.pipe.ts

@@ -0,0 +1,17 @@
+import { Pipe, PipeTransform } from '@angular/core';
+import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
+
+@Pipe({
+  name: 'safeHTML'
+})
+export class SafeHTMLPipe implements PipeTransform {
+
+  constructor(
+    private readonly _sanitizer: DomSanitizer
+  ) { }
+
+  transform(value: string): SafeHtml {
+    return this._sanitizer.bypassSecurityTrustHtml(value);
+  }
+
+}

src/app/reducers/index.ts

@@ -1,18 +1,13 @@
 import {
-  ActionReducer,
   ActionReducerMap,
-  createFeatureSelector,
-  createSelector,
   MetaReducer
 } from '@ngrx/store';
 import { environment } from '../../environments/environment';
 
 export interface State {
-
 }
 
 export const reducers: ActionReducerMap<State> = {
-
 };
 
 

src/app/store/comment/comment.actions.ts

@@ -0,0 +1,37 @@
+import { createAction, props } from '@ngrx/store';
+import { Update } from '@ngrx/entity';
+
+import { Comment } from './comment.model';
+
+export const loadComments = createAction(
+  '[Comment/API] Load Comments'
+);
+
+export const loadCommentsSuccess = createAction(
+  '[Comment/API] Load Comments Success',
+  props<{ comments: Comment[] }>()
+);
+
+export const loadCommentsFailure = createAction(
+  '[Comment/API] Load Comments Failure'
+);
+
+export const addComment = createAction(
+  '[Comment/API] Add Comment',
+  props<{ comment: Comment }>()
+);
+
+export const upsertComment = createAction(
+  '[Comment/API] Upsert Comment',
+  props<{ comment: Comment }>()
+);
+
+export const updateComment = createAction(
+  '[Comment/API] Update Comment',
+  props<{ comment: Update<Comment> }>()
+);
+
+export const deleteComment = createAction(
+  '[Comment/API] Delete Comment',
+  props<{ id: number }>()
+);

src/app/store/comment/comment.effects.ts

@@ -0,0 +1,30 @@
+import { Injectable } from '@angular/core';
+import { Actions, createEffect, ofType } from '@ngrx/effects';
+
+import { of } from 'rxjs';
+import { map, switchMap, catchError } from 'rxjs/operators';
+
+import { CommentService } from './comment.service';
+import * as CommentActions from './comment.actions';
+
+@Injectable()
+export class CommentEffects {
+
+  loadComments$ = createEffect(() =>
+    this.actions$.pipe(
+      ofType(CommentActions.loadComments),
+      switchMap(_ =>
+        this.api.getAll().pipe(
+          map(data => CommentActions.loadCommentsSuccess({ comments: data as any })), // debug type issue here
+          catchError(_ => of(CommentActions.loadCommentsFailure()))
+        )
+      )
+    )
+  );
+
+  constructor(
+    private api: CommentService,
+    private actions$: Actions
+  ) { }
+
+}

src/app/store/comment/comment.facade.ts

@@ -0,0 +1,23 @@
+import { Injectable } from '@angular/core';
+import { Store, select } from '@ngrx/store';
+
+import * as commentActions from './comment.actions';
+import * as query from './comment.selectors'
+
+@Injectable()
+export class CommentFacade {
+  list$ = this.store.pipe(select(query.getAll))
+
+  constructor(
+    private readonly store: Store
+  ) { }
+
+  getAll(): void {
+    this.store.dispatch(commentActions.loadComments());
+  }
+
+  delete(id: number): void {
+    this.store.dispatch(commentActions.deleteComment({ id }))
+  }
+
+}

src/app/store/comment/comment.model.ts

@@ -0,0 +1,19 @@
+/**
+ * from spec
+{
+id: “1”,
+title: “This is an item”,
+text: “This is a description of the item, it might describe a bug/task/comment, it
+can also display <a href=”www.google.com”>Links</a>”,
+tags: [“bug”, “issue”, “etc”]
+}
+ */
+
+export interface Comment {
+  id: number;
+  // created: Date;
+  // updated: Date;
+  title: string;
+  text: string;
+  tags: string[];
+}

src/app/store/comment/comment.module.ts

@@ -0,0 +1,22 @@
+import { NgModule } from '@angular/core';
+import { HttpClientModule } from '@angular/common/http';
+import { StoreModule } from '@ngrx/store';
+import { EffectsModule } from '@ngrx/effects';
+
+import { commentsFeatureKey, reducer } from './comment.reducer';
+import { CommentService } from './comment.service';
+import { CommentEffects } from './comment.effects';
+import { CommentFacade } from './comment.facade';
+
+@NgModule({
+  imports: [
+    HttpClientModule,
+    StoreModule.forFeature(commentsFeatureKey, reducer),
+    EffectsModule.forFeature([CommentEffects])
+  ],
+  providers: [
+    CommentService,
+    CommentFacade
+  ]
+})
+export class CommentStoreModule { }

src/app/store/comment/comment.reducer.spec.ts

@@ -0,0 +1,13 @@
+import { reducer, initialState } from './comment.reducer';
+
+describe('Comment Reducer', () => {
+  describe('unknown action', () => {
+    it('should return the previous state', () => {
+      const action = {} as any;
+
+      const result = reducer(initialState, action);
+
+      expect(result).toBe(initialState);
+    });
+  });
+});

src/app/store/comment/comment.reducer.ts

@@ -0,0 +1,44 @@
+import { Action, createReducer, on } from '@ngrx/store';
+import { EntityState, EntityAdapter, createEntityAdapter } from '@ngrx/entity';
+import { Comment } from './comment.model';
+import * as CommentActions from './comment.actions';
+
+export const commentsFeatureKey = 'comments';
+
+export interface State extends EntityState<Comment> {
+  // additional entities state properties
+}
+
+export const adapter: EntityAdapter<Comment> = createEntityAdapter<Comment>();
+
+export const initialState: State = adapter.getInitialState({
+  // additional entity state properties
+});
+
+
+export const reducer = createReducer(
+  initialState,
+  on(CommentActions.addComment,
+    (state, action) => adapter.addOne(action.comment, state)
+  ),
+  on(CommentActions.upsertComment,
+    (state, action) => adapter.upsertOne(action.comment, state)
+  ),
+  on(CommentActions.updateComment,
+    (state, action) => adapter.updateOne(action.comment, state)
+  ),
+  on(CommentActions.deleteComment,
+    (state, action) => adapter.removeOne(action.id, state)
+  ),
+  on(CommentActions.loadCommentsSuccess,
+    (state, action) => adapter.setAll(action.comments, state)
+  ),
+);
+
+
+export const {
+  selectIds,
+  selectEntities,
+  selectAll,
+  selectTotal,
+} = adapter.getSelectors();

src/app/store/comment/comment.selectors.ts

@@ -0,0 +1,8 @@
+import { createFeatureSelector, createSelector } from '@ngrx/store';
+
+import { Comment } from './comment.model';
+import * as fromComment from './comment.reducer';
+
+export const getState = createFeatureSelector<fromComment.State>(fromComment.commentsFeatureKey);
+export const getAll = createSelector(getState, fromComment.selectAll);
+export const getEntities = createSelector(getState, fromComment.selectEntities);

src/app/store/comment/comment.service.ts

@@ -0,0 +1,16 @@
+import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+
+import { map } from 'rxjs/operators'
+
+@Injectable()
+export class CommentService {
+
+  getAll() {
+    return this.http.get('./assets/data.json').pipe(
+      map(response => response as Comment[])
+    )
+  }
+
+  constructor(private http: HttpClient) { }
+}

src/app/store/comment/index.ts

@@ -0,0 +1,2 @@
+export * from './comment.facade';
+export * from './comment.model';

src/app/store/index.ts

@@ -0,0 +1 @@
+export * from './comment/comment.module'

src/assets/data.json

@@ -0,0 +1,32 @@
+[
+  {
+    "id": 1,
+    "title": "Comment One",
+    "text": "This is a description of the item, it might describe a bug/task/comment, it can also display <a href=\"http://www.google.com\">Links</a>",
+    "tags": [
+      "bug",
+      "issue",
+      "etc"
+    ]
+  },
+  {
+    "id": 2,
+    "title": "Comment Two",
+    "text": "This is a description of the item, it might describe a bug/task/comment, it can also display <a href=\"http://www.google.com\">Links</a>",
+    "tags": [
+      "bug",
+      "issue",
+      "etc"
+    ]
+  },
+  {
+    "id": 3,
+    "title": "Comment Three",
+    "text": "This is a description of the item, it might describe a bug/task/comment, it can also display <a href=\"http://www.google.com\">Links</a>",
+    "tags": [
+      "bug",
+      "issue",
+      "etc"
+    ]
+  }
+]