improve chat and add new "empty" view for recommendations

src/app/chat/chat-feature.cy.ts

@@ -6,7 +6,7 @@ import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
 import { MountConfig } from 'cypress/angular';
 import { CommonModule } from '@angular/common';
 import { chats, profilePictures } from '@cypress-support/mock-backend';
-import { ChatPageComponent } from './feature/chat-page/chat-page.component';
+import { ChatComponent } from './chat.component';
 
 // const timerMock = new TimerMockService();
 
@@ -20,19 +20,19 @@ import { ChatPageComponent } from './feature/chat-page/chat-page.component';
 //   ],
 // };
 
-const defaultMountConfig: MountConfig<ChatPageComponent> = {
+const defaultMountConfig: MountConfig<ChatComponent> = {
   imports: [
     CommonModule,
     BrowserAnimationsModule,
     HttpClientModule,
     RouterTestingModule.withRoutes([
       {
         path: 'chat',
-        component: ChatPageComponent,
+        component: ChatComponent,
       },
       {
         path: 'chat/:participantId',
-        component: ChatPageComponent,
+        component: ChatComponent,
       },
     ]),
   ],
@@ -265,7 +265,7 @@ describe('The chat page', () => {
       ])
     );
 
-    cy.mount(ChatPageComponent, defaultMountConfig);
+    cy.mount(ChatComponent, defaultMountConfig);
     cy.contains('Adam Ant').click();
     cy.contains('Hello, how are you?').should('be.visible');
     cy.contains('I am fine, thanks.').should('be.visible');

src/app/chat/feature/chat-page/chat-page.component.ts → src/app/chat/chat.component.ts

@@ -1,13 +1,18 @@
-import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import {
+  ChangeDetectionStrategy,
+  Component,
+  inject,
+  Signal,
+} from '@angular/core';
 
 import { RouterLink } from '@angular/router';
 import { AlertComponent } from '@shared/ui/alert/alert.component';
-import { ChatMessageComposerComponent } from '../../ui/message-composer/chat-message-composer.component';
-import { ChatMessagesComponent } from '../../ui/chat-messages/chat-messages.component';
-import { ChatConversationListComponent } from '../../ui/conversation-list/chat-conversation-list.component';
+import { ChatMessageComposerComponent } from './ui/message-composer/chat-message-composer.component';
+import { ChatMessagesComponent } from './ui/chat-messages/chat-messages.component';
+import { ChatConversationListComponent } from './ui/conversation-list/chat-conversation-list.component';
 import { AsyncPipe, NgFor, NgIf } from '@angular/common';
-import { ChatStateService } from '../../data-access/chat-state.service';
-import { ChatConversationHeaderComponent } from '../../ui/chat-conversation-header.component';
+import { ChatStateService } from './data-access/chat-state.service';
+import { ChatConversationHeaderComponent } from './ui/chat-conversation-header.component';
 import { interval, take } from 'rxjs';
 
 @Component({
@@ -22,20 +27,27 @@ import { interval, take } from 'rxjs';
         >
           <div class="flex h-[600px] border">
             <app-chat-conversation-list
-              class="min-w-[300px] overflow-y-auto border-r border-gray-300 py-2 max-md:flex-1 md:flex-none"
+              class="min-w-[300px] overflow-y-auto overflow-x-hidden border-r border-gray-300 py-2 max-md:flex-1 md:w-[300px] md:flex-none"
               [class.max-md:hidden]="chatState.activeChatId() !== null"
             ></app-chat-conversation-list>
             <div
               class="flex w-full flex-col bg-gray-100"
               [class.max-md:hidden]="chatState.activeChatId() === null"
             >
-              <!--              TODO: für mobile oben einen header ins element legen -->
-              <!--              TODO: allgemein das ding mit dem chat state nutzbar machen  -->
               <app-chat-conversation-header></app-chat-conversation-header>
-              <app-chat-messages class="grow"></app-chat-messages>
-              <app-chat-message-composer
-                class="flex-none"
-              ></app-chat-message-composer>
+              <ng-container *ngIf="hasActiveChat(); else noActiveChat">
+                <app-chat-messages class="grow"></app-chat-messages>
+                <app-chat-message-composer
+                  class="flex-none"
+                ></app-chat-message-composer>
+              </ng-container>
+              <ng-template #noActiveChat>
+                <div class="flex h-full flex-col items-center justify-center">
+                  <p class="font-lg text-gray-500">
+                    Wähle einen Chat aus der Liste aus.
+                  </p>
+                </div>
+              </ng-template>
             </div>
           </div>
         </ng-container>
@@ -61,9 +73,9 @@ import { interval, take } from 'rxjs';
 
       <ng-container *ngIf="chatState.chatsFetchState() === 'error'">
         <app-alert alertType="error" icon="error">
-          <p>
+          <span>
             Es ist ein Fehler aufgetreten. Bitte versuchen Sie es später erneut.
-          </p>
+          </span>
         </app-alert>
       </ng-container>
 
@@ -89,7 +101,7 @@ import { interval, take } from 'rxjs';
         </div>
       </ng-container>
     </div>`,
-  styleUrls: ['./chat-page.component.scss'],
+  styleUrls: ['./chat.component.scss'],
   providers: [ChatStateService],
   changeDetection: ChangeDetectionStrategy.Default,
   standalone: true,
@@ -105,7 +117,8 @@ import { interval, take } from 'rxjs';
     ChatConversationHeaderComponent,
   ],
 })
-export class ChatPageComponent {
+export class ChatComponent {
   chatState = inject(ChatStateService);
   delayLoading$ = interval(100).pipe(take(1));
+  hasActiveChat: Signal<boolean> = this.chatState.hasActiveChat;
 }

src/app/chat/chat.routes.ts

@@ -1,13 +1,13 @@
 import { Routes } from '@angular/router';
-import { ChatPageComponent } from './feature/chat-page/chat-page.component';
+import { ChatComponent } from './chat.component';
 
 export const CHAT_ROUTES: Routes = [
   {
     path: ':participantId',
-    component: ChatPageComponent,
+    component: ChatComponent,
   },
   {
     path: '',
-    component: ChatPageComponent,
+    component: ChatComponent,
   },
 ];

src/app/chat/data-access/chat-http.service.ts

@@ -11,7 +11,6 @@ import {
   ChatDto,
   ChatList,
   ChatsAndDancers,
-  CreateChatResponse,
   CreateMessageRequest,
   DancerId,
   DancerMapDto,
@@ -169,16 +168,15 @@ export class ChatHttpService {
     return Array.from(dancerIds.keys());
   }
 
-  createChat$(participantId: string): Observable<CreateChatResponse> {
+  /** returns the chat id */
+  createChat$(participantId: string): Observable<string> {
     const body = {
       participantIds: [this.profileService.getProfile()?.id, participantId],
     };
 
-    return this.http.post<CreateChatResponse>(
-      `${this.chatApiUrl}`,
-      body,
-      this.defaultOptions
-    );
+    return this.http
+      .post<{ id: string }>(`${this.chatApiUrl}`, body)
+      .pipe(map((res) => res.id));
   }
 
   sendMessage$(chatId: string, message: string): Observable<void> {

src/app/chat/data-access/chat-state.adapter.ts

@@ -1,16 +1,12 @@
 import { ChatAdaptState } from './chat-state.service';
 import { createAdapter } from '@state-adapt/core';
-import {
-  ChatDto,
-  CreateChatResponse,
-  DancerMapDto,
-  MessagesWithChatId,
-} from './chat.types';
+import { ChatDto, DancerMapDto, MessagesWithChatId } from './chat.types';
 import { HttpErrorResponse } from '@angular/common/http';
 
 export const chatStateAdapter = createAdapter<ChatAdaptState>()({
   chatsFetched: (state, chatsDto: ChatDto[]) => {
     const newChats = chatsDto
+      .reverse() // latest created chat first
       .filter(
         (chatDto) =>
           !state.chats.find((stateChat) => stateChat.id === chatDto.chatId)
@@ -87,10 +83,10 @@ export const chatStateAdapter = createAdapter<ChatAdaptState>()({
     openChatWithParticipantId: null,
   }),
 
-  chatCreated: (state, chat: CreateChatResponse) => ({
+  chatCreated: (state, chatId: string) => ({
     // select new chat
     ...state,
-    activeChatId: chat.chatId,
+    activeChatId: chatId,
     chatCreated: true,
   }),
 
@@ -120,6 +116,7 @@ export const chatStateAdapter = createAdapter<ChatAdaptState>()({
         .flat()
         .filter((participant) => participant.dancerName === undefined),
     activeChatId: (state) => state.activeChatId,
+    hasActiveChat: (state) => state.activeChatId !== null,
     messagesForActiveChat: (state) =>
       state.chats.find((chat) => chat.id === state.activeChatId)?.messages ??
       [],

src/app/chat/data-access/chat-state.service.ts

@@ -187,6 +187,9 @@ export class ChatStateService {
   activeChatParticipants = toSignal(this.chatStore.activeChatParticipants$, {
     requireSync: true,
   });
+  hasActiveChat = toSignal(this.chatStore.hasActiveChat$, {
+    requireSync: true,
+  });
 
   constructor() {}
 }

src/app/chat/data-access/chat.types.ts

@@ -1,10 +1,3 @@
-import { Profile } from '../../profile/data-access/types/profile.types';
-
-export type Conversation = {
-  chatId: string;
-  participants: ChatParticipant[];
-};
-
 export type ChatDto = {
   chatId: string;
   participantIds: DancerId[];
@@ -21,8 +14,6 @@ export type ChatMessage = {
   createdAt: string;
 };
 
-export type ChatType = 'GROUP' | 'DIRECT';
-
 export type ChatList = {
   chats: ChatDto[];
 };
@@ -64,12 +55,6 @@ export type CreateMessageRequest = {
   text: string;
 };
 
-export type ChatData = {
-  chats: ChatDto[];
-  dancers: DancerMapDto;
-  profile: Profile;
-};
-
 export type CreateChatResponse = {
   chatId: string;
   dancerIds: string[];