[frontend] Add twitter public component

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-card.component.html

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+<div *ngIf="twitters$ | async as twitters">
+  <mat-card *ngIf="twitters.length !== 0">
+    <mat-card-header>
+      <div mat-card-avatar class="twitter"></div>
+      <mat-card-title class="platform-title">
+        Twitter
+        <button mat-icon-button aria-label="How to use">
+          <mat-icon
+            matTooltip="How to send and receive hood broadcast messages with twitter"
+            class="info-button"
+            (click)="onInfoClick()"
+            >info</mat-icon
+          >
+        </button>
+      </mat-card-title>
+    </mat-card-header>
+    <mat-card-content>
+      <mat-selection-list [multiple]="false" class="list">
+        <a
+          *ngFor="let twitter of twitters"
+          href="https://twitter.com/{{ twitter.username }}"
+          routerLinkActive="router-link-active"
+        >
+          <mat-list-option>
+            @{{ twitter.username }}
+            <mat-divider></mat-divider>
+          </mat-list-option>
+        </a>
+      </mat-selection-list>
+    </mat-card-content>
+  </mat-card>
+</div>

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-card.component.scss

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+.twitter {
+  background-image: url("../../../../assets/twitter.png");
+  background-size: cover;
+}
+
+.platform-title {
+  display: grid;
+  grid-template-columns: 1fr 40px;
+  width: 100%;
+  align-items: center;
+}

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-card.component.spec.ts

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

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-card.component.ts

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+import { Component, OnInit, Input } from '@angular/core';
+import { TwitterService } from 'src/app/core/api';
+import { TwitterBotInfoDialogComponent } from './twitter-bot-info-dialog/twitter-bot-info-dialog.component';
+import { MatDialog } from '@angular/material/dialog';
+
+@Component({
+  selector: 'app-twitter-bot-card',
+  templateUrl: './twitter-bot-card.component.html',
+  styleUrls: ['./twitter-bot-card.component.scss'],
+})
+export class TwitterBotCardComponent implements OnInit {
+  @Input() hoodId;
+  twitters$;
+
+  constructor(
+    private twitterService: TwitterService,
+    private dialog: MatDialog
+  ) {}
+
+  ngOnInit(): void {
+    this.twitters$ = this.twitterService.getTwittersPublic(this.hoodId);
+  }
+
+  onInfoClick() {
+    this.dialog.open(TwitterBotInfoDialogComponent);
+  }
+}

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-info-dialog/twitter-bot-info-dialog.component.html

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+<p>twitter-bot-info-dialog works!</p>

kibicara-frontend/src/app/platforms/twitter/twitter-bot-card/twitter-bot-info-dialog/twitter-bot-info-dialog.component.ts

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+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-twitter-bot-info-dialog',
+  templateUrl: './twitter-bot-info-dialog.component.html',
+  styleUrls: ['./twitter-bot-info-dialog.component.scss'],
+})
+export class TwitterBotInfoDialogComponent implements OnInit {
+  constructor() {}
+
+  ngOnInit(): void {}
+}