feat: implement message bar and enhance chat functionality

- Added MessageBarComponent for sending messages.
- Integrated message sending logic in ChatService.
- Updated FeedComponent to scroll to the bottom on new messages.
- Improved layout and styling for chat components.
- Adjusted environment configuration for API base URL.

angular.json

@@ -74,7 +74,8 @@
               "buildTarget": "ui:build:production"
             },
             "development": {
-              "buildTarget": "ui:build:development"
+              "buildTarget": "ui:build:development",
+              "proxyConfig": "proxy.conf.json"
             }
           },
           "defaultConfiguration": "development"

proxy.conf.json

@@ -0,0 +1,8 @@
+{
+  "/api": {
+    "target": "http://localhost:5000",
+    "secure": false,
+    "ws": true,
+    "changeOrigin": true
+  }
+}

src/app/auth/auth.module.scss

@@ -13,8 +13,7 @@
 
     button {
       display: block;
+      margin-bottom: 10px 0;
     }
   }
-
-
 }

src/app/auth/login/login.component.ts

@@ -11,7 +11,7 @@ import { Router } from '@angular/router';
   styleUrls: ['../auth.module.scss', './login.component.scss']
 })
 export class LoginComponent implements OnInit {
-  loginForm!: FormGroup;
+  public loginForm!: FormGroup;
 
   constructor(
     private authService: AuthService,
@@ -41,7 +41,7 @@ export class LoginComponent implements OnInit {
             this.router.navigateByUrl('chat');
           }
         },
-        error: _ => {
+        error: () => {
           this.toastrService.error("API error", "Error");
         }
       })

src/app/chat/chat.module.ts

@@ -12,6 +12,11 @@ import { ToolbarComponent } from '../common/toolbar/toolbar.component';
 import { MatBadgeModule } from '@angular/material/badge';
 import { MatButtonModule } from '@angular/material/button';
 import { MatTooltipModule } from '@angular/material/tooltip';
+import { MatIconModule } from '@angular/material/icon';
+import { MessageBarComponent } from './chat/message-bar/message-bar.component';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatInputModule } from '@angular/material/input';
+import { ReactiveFormsModule } from '@angular/forms';
 
 @NgModule({
   declarations: [
@@ -20,7 +25,8 @@ import { MatTooltipModule } from '@angular/material/tooltip';
     FeedComponent,
     ChannelEntryComponent,
     MessageComponent,
-    ProfilePictureComponent
+    ProfilePictureComponent,
+    MessageBarComponent
   ],
   imports: [
     CommonModule,
@@ -28,7 +34,11 @@ import { MatTooltipModule } from '@angular/material/tooltip';
     ToolbarComponent,
     MatBadgeModule,
     MatButtonModule,
-    MatTooltipModule
+    MatTooltipModule,
+    MatIconModule,
+    MatFormFieldModule,
+    MatInputModule,
+    ReactiveFormsModule
   ]
 })
 export class ChatModule { }

src/app/chat/chat/channel-list/channel-entry/channel-entry.component.scss

@@ -1,5 +1,5 @@
 button {
-  width: 70%;
+  width: 95%;
   display: block;
-  margin: 10px auto;
+  margin: 5px auto;
 }

src/app/chat/chat/channel-list/channel-list.component.ts

@@ -1,4 +1,4 @@
-import { Component, EventEmitter, OnChanges, OnDestroy, OnInit, Output } from '@angular/core';
+import { Component, EventEmitter, OnDestroy, OnInit, Output } from '@angular/core';
 import { Channel } from '../../../models/channel';
 import { ChatService } from '../../../services/chat.service';
 import { Subject, takeUntil } from 'rxjs';
@@ -20,7 +20,7 @@ export class ChannelListComponent implements OnInit, OnDestroy {
   constructor(private chatService: ChatService) { }
 
   ngOnInit() {
-    this.chatService.ListChannels()
+    this.chatService.ListAvailableChannels()
       .pipe(takeUntil(this.destroy))
       .subscribe(channels => {
         this.channels = channels;

src/app/chat/chat/chat.component.html

@@ -1,6 +1,9 @@
-<app-toolbar />
-
 <div id="container">
+  <app-toolbar />
+
   <app-channel-list (select)="Select($event)"></app-channel-list>
+
   <app-feed [channel]="this.selectedChannel"></app-feed>
+
+  <app-message-bar [channel]="this.selectedChannel?.id ?? 1"></app-message-bar>
 </div>

src/app/chat/chat/chat.component.scss

@@ -1,5 +1,35 @@
 #container {
-  display: grid;
-  grid-template-columns: minmax(auto, 150px) 1fr;
   height: 100%;
+
+  display: grid;
+  grid-template-columns: 150px 1fr;
+  grid-template-rows: 65px 1fr auto;
+  gap: 0px;
+
+  app-toolbar {
+    grid-column: span 2 / span 2;
+
+  }
+
+  app-channel-list {
+    grid-row: span 2 / span 2;
+    grid-row-start: 2;
+  }
+
+  app-feed {
+    grid-row-start: 2;
+
+    border-left: 2px solid var(--mat-sys-surface-variant);
+    border-top: 2px solid var(--mat-sys-surface-variant);
+    border-radius: 10px 0 0 0;
+
+    background-color: var(--mat-sys-background);
+  }
+
+  app-message-bar {
+    grid-column-start: 2;
+    grid-row-start: 3;
+
+    border-left: 2px solid var(--mat-sys-surface-variant);
+  }
 }

src/app/chat/chat/feed/feed.component.html

@@ -1,4 +1,3 @@
-<app-message
-  *ngFor="let message of this.messages"
-  [message]="message"
-/>
+<div #scrollable id="scrollable">
+  <app-message *ngFor="let message of this.messages" [message]="message" />
+</div>

src/app/chat/chat/feed/feed.component.scss

@@ -1,7 +1,3 @@
 :host {
-  border-left: 2px solid var(--mat-sys-surface-variant);
-  border-top: 2px solid var(--mat-sys-surface-variant);
-  border-radius: 10px 0;
-
-  background-color: var(--mat-sys-background);
+  overflow-y: scroll;
 }

src/app/chat/chat/feed/feed.component.ts

@@ -1,7 +1,6 @@
-import { Component, Input, OnChanges, OnDestroy, OnInit } from '@angular/core';
+import { AfterContentInit, AfterViewChecked, AfterViewInit, Component, ElementRef, Input, OnChanges, OnDestroy, ViewChild } from '@angular/core';
 import { Message } from '../../../models/message';
 import { ChatService } from '../../../services/chat.service';
-import { UserService } from '../../../services/user.service';
 import { Channel } from '../../../models/channel';
 import { Subscription } from 'rxjs';
 
@@ -11,7 +10,7 @@ import { Subscription } from 'rxjs';
   templateUrl: './feed.component.html',
   styleUrl: './feed.component.scss'
 })
-export class FeedComponent implements OnChanges, OnDestroy {
+export class FeedComponent implements OnChanges, OnDestroy, AfterViewInit {
   private readonly DEFAULT_CHANNEL_ID: number = 1;
 
   @Input('channel') public channel?: Channel;
@@ -19,9 +18,13 @@ export class FeedComponent implements OnChanges, OnDestroy {
 
   public subscription?: Subscription;
 
-  constructor(private chatService: ChatService) { }
+  constructor(private chatService: ChatService, private element: ElementRef<HTMLElement>) { }
 
-  ngOnChanges() {
+  ngAfterViewInit(): void {
+    this.scrollToBottom();
+  }
+
+  ngOnChanges(): void {
     if (this.subscription) {
       this.subscription.unsubscribe();
       this.messages = [];
@@ -29,7 +32,11 @@ export class FeedComponent implements OnChanges, OnDestroy {
 
     this.subscription =
       this.chatService.GetMessages(this.channel?.id ?? this.DEFAULT_CHANNEL_ID)
-        .subscribe(message => this.messages.push(message));
+        .subscribe(message => {
+          this.messages.push(message);
+
+          if (this.isAtBottom()) this.scrollToBottom();
+        });
   }
 
   ngOnDestroy(): void {
@@ -37,4 +44,13 @@ export class FeedComponent implements OnChanges, OnDestroy {
       this.subscription.unsubscribe();
     }
   }
+
+  private isAtBottom(): boolean {
+    let element = this.element.nativeElement;
+    return Math.abs(element.scrollHeight - element.clientHeight - element.scrollTop) <= 100;
+  }
+
+  private scrollToBottom(): void {
+    setTimeout(() => this.element.nativeElement.scrollTop = this.element.nativeElement.scrollHeight, 100);
+  }
 }

src/app/chat/chat/feed/message/message.component.html

@@ -1,8 +1,8 @@
 <div class="message-container">
-  <app-profile-picture [username]="this.message.sender" />
+  <app-profile-picture [username]="this.message.sender_name" />
 
   <div class="message-inner-container">
-    <div class="message-sender">{{this.message.sender}}</div>
+    <div class="message-sender">{{this.message.sender_name}}</div>
     <div class="message-content">{{this.message.content}}</div>
   </div>
 

src/app/chat/chat/feed/message/profile-picture/profile-picture.component.html

@@ -1 +1,2 @@
-<img [src]="this.url" [alt]="this.username">
+<img *ngIf="this.url != ''" [src]="this.url" [alt]="this.username">
+<mat-icon *ngIf="this.url == ''">face</mat-icon>

src/app/chat/chat/feed/message/profile-picture/profile-picture.component.scss

@@ -1,7 +1,23 @@
-img {
+:host {
   display: inline-block;
   width: 100%;
+  aspect-ratio: 1;
 
   border-radius: 50%;
-  box-shadow: 0px 0px 5px var(--mat-sys-on-background);
+  box-shadow: 0px 0px 2px var(--mat-sys-on-background);
+}
+
+// style alt for missing images
+img {
+  display: flex;
+  justify-content: center;
+  padding-top: 15px;
+  overflow: hidden;
+}
+
+mat-icon {
+  width: 100% !important;
+  height: 100% !important;
+  text-align: center;
+  font-size: 50px;
 }

src/app/chat/chat/message-bar/message-bar.component.html

@@ -0,0 +1,12 @@
+<form [formGroup]="messageForm" (submit)="Send()">
+
+  <mat-form-field>
+    <mat-label>Message</mat-label>
+    <textarea type="textarea" required matInput formControlName="content"></textarea>
+  </mat-form-field>
+
+  <button mat-button type="button" (click)="Send()">
+    <mat-icon>send</mat-icon>
+  </button>
+
+</form>

src/app/chat/chat/message-bar/message-bar.component.scss

@@ -0,0 +1,23 @@
+form {
+  align-items: center;
+
+  padding: 10px;
+
+
+  display: grid;
+  grid-template-columns: 1fr auto;
+
+  mat-form-field {
+    padding-top: 5px;
+  }
+}
+
+button {
+  margin: 0 5px;
+  transform: translateY(-10px);
+
+  mat-icon {
+    margin: auto;
+    vertical-align: middle;
+  }
+}

src/app/chat/chat/message-bar/message-bar.component.ts

@@ -0,0 +1,44 @@
+import { Component, Input, OnInit } from '@angular/core';
+import { ChatService } from '../../../services/chat.service';
+import { FormBuilder, FormControl, FormGroup, Validators } from '@angular/forms';
+import { ToastrService } from 'ngx-toastr';
+
+@Component({
+  selector: 'app-message-bar',
+  standalone: false,
+  templateUrl: './message-bar.component.html',
+  styleUrl: './message-bar.component.scss'
+})
+export class MessageBarComponent implements OnInit {
+  private readonly MAX_MESSAGE_LENGTH: number = 120;
+
+  @Input('channel') channel!: number;
+
+  public messageForm!: FormGroup;
+
+  constructor(private chatService: ChatService,
+    private formBuilder: FormBuilder,
+    private toastrService: ToastrService) { }
+
+  ngOnInit(): void {
+    this.messageForm = this.formBuilder.group({
+      content: new FormControl('', [
+        Validators.required,
+        Validators.minLength(1),
+        Validators.maxLength(this.MAX_MESSAGE_LENGTH)
+      ])
+    });
+  }
+
+  public Send(): void {
+    if (this.messageForm.valid) {
+      this.chatService.SendMessage(
+        this.channel,
+        this.messageForm.get("content")!.value).subscribe(
+          {
+            next: () => this.messageForm.setValue({ "content": "" }),
+            error: () => this.toastrService.error("Failed to send message.", "Error")
+          });
+    }
+  }
+}

src/app/models/message.ts

@@ -1,9 +1,7 @@
-import { Timestamp } from "rxjs"
-
 export class Message {
   public id!: number
-  public sender!: string
-  public channel!: number
+  public sender_name!: string
+  public channel_id!: number
   public time!: Date
   public content!: string
 }

src/app/services/auth.service.ts

@@ -1,6 +1,6 @@
 import { HttpClient } from '@angular/common/http';
 import { inject, Injectable } from '@angular/core';
-import { catchError, map, Observable, of } from 'rxjs';
+import { catchError, map, Observable, of, tap } from 'rxjs';
 import { LoginResponse, RegisterResponse } from './responses/auth';
 import { ActivatedRouteSnapshot, CanActivateFn, Router, RouterStateSnapshot } from '@angular/router';
 import { environment } from '../../environment/environment';
@@ -14,6 +14,8 @@ export class AuthService {
   private readonly PASSWORD_FIELD: string = "password";
   private readonly REPEAT_PASSWORD_FIELD: string = "repeatPassword";
 
+  private loggedIn: boolean = false;
+
   constructor(private http: HttpClient) { }
 
   public Login(username: string, password: string): Observable<LoginResponse> {
@@ -51,29 +53,40 @@ export class AuthService {
 
     return this.http.get(url, { withCredentials: true }).pipe(
       map(() => true),
-      catchError(() => of(false))
+      catchError(() => of(false)),
+      tap(result => this.loggedIn = result)
     );
   }
 
-  public IsLoggedIn(): boolean {
+  public HasToken(): boolean {
     let cookies = document.cookie.split(';');
     let found = false;
     cookies.forEach(cookie => {
       cookie = cookie.trim();
       found = found || cookie.startsWith(this.SESSION_COOKIE + "=") && cookie.split('=', 2)[1] != '';
     });
+
     return found;
   }
+
+  public IsLoggedIn(): boolean { return this.loggedIn; }
 }
 
 export const IsLoggedInCanActivate: CanActivateFn = (
   _: ActivatedRouteSnapshot,
   __: RouterStateSnapshot
-) => {
-  if (inject(AuthService).IsLoggedIn()) {
-    return true;
-  } else {
-    inject(Router).navigateByUrl("auth/login");
-    return false;
-  }
-}
+): Observable<boolean> => {
+  const authService = inject(AuthService);
+  const router = inject(Router);
+
+  return authService.Bump().pipe(
+    map(isValid => {
+      if (isValid) {
+        return true;
+      } else {
+        router.navigate(['auth/login']);
+        return false;
+      }
+    })
+  );
+};

src/app/services/chat.service.ts

@@ -1,173 +1,85 @@
 import { Injectable } from '@angular/core';
-import { from, Observable } from 'rxjs';
+import { catchError, from, map, merge, mergeMap, Observable, throwError } from 'rxjs';
+import { webSocket } from 'rxjs/webSocket';
 import { Channel } from '../models/channel';
 import { Message } from '../models/message';
+import { HttpClient } from '@angular/common/http';
+import { environment } from '../../environment/environment';
+import { GetMessagesResponse, ListAvailableChannelsResponse, SendMessageResponse } from './responses/chat';
 
 @Injectable({
   providedIn: 'root'
 })
 export class ChatService {
 
-  constructor() { }
+  private readonly CHANNEL: string = "channel_id";
+  private readonly CONTENT: string = "content";
 
-  // TODO: implement
-  public ListChannels(): Observable<Channel[]> {
-    return new Observable<Channel[]>(subscriber => {
-      subscriber.next([
-        {
-          id: 0,
-          name: 'default',
-          description: 'this is the default channel'
-        },
-        {
-          id: 1,
-          name: 'XIV. Leo',
-          description: 'this is another channel'
-        },
-      ]);
-      subscriber.complete();
-    });
+  constructor(private http: HttpClient) { }
+
+  public ListAvailableChannels(): Observable<Channel[]> {
+    let url = `${environment.apiBase}/chat/channels`
+    return this.http.get<ListAvailableChannelsResponse>(url, { withCredentials: true })
+      .pipe(
+        map(response => {
+          if (response.error) {
+            throw new Error(response.error);
+          }
+
+          if (response.channels) {
+            return response.channels;
+          }
+
+          throw new Error("bad API response, missing channels with no error");
+        }),
+        catchError(error => throwError(() => new Error(error.error.message)))
+      );
   }
 
-  // TODO: implement
-  // TODO: refactor this so it first returns the n last messages,
-  //       then listens for incoming messages and forwards them as they come 
   public GetMessages(channelID: number): Observable<Message> {
+    let url = `${environment.apiBase}/chat/messages/${channelID}`;
+    let messages: Observable<Message[]> =
+      this.http.get<GetMessagesResponse>(url, { withCredentials: true })
+        .pipe(
+          map(response => {
+            if (response.error) {
+              throw new Error(response.error);
+            }
 
-    return from([
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 1,
-        sender: 'admin',
-        channel: 1,
-        time: new Date(),
-        content: 'this is my first message'
-      },
-      {
-        id: 2,
-        sender: 'admin',
-        channel: 2,
-        time: new Date(),
-        content: 'this is my second message'
-      }
-    ]);
+            if (response.messages) {
+              return response.messages;
+            }
+
+            throw new Error("bad API response, missing messages with no error");
+          }),
+          catchError(error => throwError(() => new Error(error.error.message)))
+        );
+
+    url = `${environment.apiBase}/chat/subscribe/${channelID}`;
+    let socket = webSocket<Message>(url);
+
+    return merge(
+      messages.pipe(mergeMap(msgArray => from(msgArray))),
+      socket.asObservable());
+  }
+
+  public SendMessage(channel: number, content: string): Observable<SendMessageResponse> {
+    let url = `${environment.apiBase}/chat/send`;
+
+    let data = new FormData();
+    data.append(this.CHANNEL, channel.toString());
+    data.append(this.CONTENT, content);
+
+    return this.http.post<SendMessageResponse>(url, data, { withCredentials: true })
+      .pipe(
+        map(response => {
+          if (response.error) {
+            throw new Error(response.error);
+          }
+
+          return response;
+        }),
+        catchError(error => throwError(() => new Error(error.error.message)))
+      );
   }
 }

src/app/services/responses/chat.ts

@@ -0,0 +1,13 @@
+import { Channel } from "../../models/channel";
+import { Message } from "../../models/message";
+import { APIResponse } from "./basic";
+
+export class ListAvailableChannelsResponse extends APIResponse {
+  public channels?: Channel[];
+}
+
+export class GetMessagesResponse extends APIResponse {
+  public messages?: Message[];
+}
+
+export class SendMessageResponse extends APIResponse { }

src/environment/environment.ts

@@ -1,4 +1,4 @@
 export const environment = {
   production: false,
-  apiBase: "http://localhost:5000"
+  apiBase: "/api"
 }

src/styles.scss

@@ -2,7 +2,7 @@
 
 html,
 body {
-  height: 100%;
+  height: 100dvh;
   margin: 0;
 
   font-family: var(--mat-sys-body-medium-font);