json viewer

client/angular.json

@@ -53,6 +53,9 @@
             ],
             "styles": [
               "src/styles.scss"
+            ],
+            "scripts": [
+              "src/jsonview.js"
             ]
           },
           "configurations": {

client/src/app/app.routes.ts

@@ -9,6 +9,10 @@ export const routes: Routes = [
     path: '',
     component: HomePageComponent,
   },
+  {
+    path: 'chat',
+    component: ChatPageComponent,
+  },
   {
     path: 'chat/:peerId',
     component: ChatPageComponent,

client/src/app/chat-page.component.html

@@ -42,10 +42,10 @@
             }
 
             @for (connectedPeer of session.peers(); track connectedPeer.id) {
+              <article class="peer-tile" [class.peer-tile-active]="connectedPeer.id === peerId()">
                 <button
-                class="peer-tile text-start"
+                  class="peer-tile-main text-start"
                   type="button"
-                [class.peer-tile-active]="connectedPeer.id === peerId()"
                   (click)="switchPeer(connectedPeer.id)"
                 >
                   <div class="peer-tile-row">
@@ -71,6 +71,16 @@
                     ></span>
                   </div>
                 </button>
+                <button
+                  class="peer-tile-delete"
+                  type="button"
+                  title="Delete conversation"
+                  aria-label="Delete conversation"
+                  (click)="deleteConversation(connectedPeer.id, $event)"
+                >
+                  🗑️
+                </button>
+              </article>
             }
           </div>
         </aside>
@@ -121,6 +131,10 @@
                         />
                       }
 
+                      @if (isIncomingJsonFileEntry(entry)) {
+                        <app-json-file-viewer [entry]="entry"></app-json-file-viewer>
+                      }
+
                       <div>
                         <div class="fw-semibold">{{ entry.fileName }}</div>
                         @if (entry.fileSize) {

client/src/app/chat-page.component.scss

@@ -106,8 +106,12 @@
 }
 
 .peer-tile {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 0.75rem;
+  align-items: center;
   width: 100%;
-  padding: 0.95rem 1rem;
+  padding: 0.8rem 0.85rem 0.8rem 1rem;
   border: 1px solid var(--surface-border);
   border-radius: 1rem;
   color: inherit;
@@ -115,6 +119,30 @@
   transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
 }
 
+.peer-tile-main {
+  min-width: 0;
+  padding: 0;
+  border: 0;
+  color: inherit;
+  background: transparent;
+}
+
+.peer-tile-delete {
+  width: 2.2rem;
+  height: 2.2rem;
+  padding: 0;
+  border: 0;
+  border-radius: 999px;
+  background: transparent;
+  font-size: 1rem;
+  line-height: 1;
+}
+
+.peer-tile-delete:hover,
+.peer-tile-delete:focus-visible {
+  background: var(--badge-background);
+}
+
 .peer-tile:hover,
 .peer-tile:focus-visible,
 .peer-tile-active {

client/src/app/chat-page.component.ts

@@ -5,11 +5,12 @@ import { FormsModule } from '@angular/forms';
 import { ActivatedRoute, Router, RouterLink } from '@angular/router';
 
 import { ChatSessionService } from './chat-session.service';
+import { JsonFileViewerComponent } from './json-file-viewer.component';
 import type { ChatEntry, ConnectionState } from './models';
 
 @Component({
   selector: 'app-chat-page',
-  imports: [CommonModule, FormsModule, RouterLink],
+  imports: [CommonModule, FormsModule, RouterLink, JsonFileViewerComponent],
   templateUrl: './chat-page.component.html',
   styleUrl: './chat-page.component.scss',
 })
@@ -120,10 +121,25 @@ export class ChatPageComponent {
     await this.session.deleteMessage(entry);
   }
 
+  async deleteConversation(peerId: string, event?: Event): Promise<void> {
+    event?.stopPropagation();
+    await this.session.deleteConversation(peerId);
+  }
+
   isImageEntry(entry: ChatEntry): boolean {
     return entry.kind === 'file' && !!entry.downloadUrl && (entry.fileMimeType?.startsWith('image/') ?? false);
   }
 
+  isIncomingJsonFileEntry(entry: ChatEntry): boolean {
+    return (
+      entry.kind === 'file' &&
+      entry.direction === 'incoming' &&
+      !!entry.downloadUrl &&
+      !!entry.fileName &&
+      entry.fileName.toLowerCase().endsWith('.json')
+    );
+  }
+
   isPeerTyping(peerId: string): boolean {
     return this.session.typingPeerIds().includes(peerId);
   }

client/src/app/chat-session.service.ts

@@ -1060,6 +1060,51 @@ export class ChatSessionService {
     }
   }
 
+  async deleteConversation(peerId: string): Promise<void> {
+    const entries = this.messages().filter((entry) => entry.peerId === peerId);
+
+    for (const entry of entries) {
+      this.removeMessageById(entry.id);
+    }
+
+    this.clearUnreadPeer(peerId);
+    this.clearPeerTyping(peerId);
+
+    const currentUserId = this.currentUser()?.id;
+
+    if (!currentUserId) {
+      return;
+    }
+
+    try {
+      const conversationKey = this.conversationStorageKey(currentUserId, peerId);
+      await this.queueMessageStoreOperation(conversationKey, async () => {
+        const database = await this.openMessageDatabase();
+
+        if (!database) {
+          return;
+        }
+
+        const transaction = database.transaction(ChatSessionService.messageStoreName, 'readwrite');
+        const store = transaction.objectStore(ChatSessionService.messageStoreName);
+        const conversationIndex = store.index('conversationKeyCreatedAt');
+        const rows = await this.waitForRequest(
+          conversationIndex.getAll(
+            IDBKeyRange.bound([conversationKey, 0], [conversationKey, Number.MAX_SAFE_INTEGER]),
+          ),
+        ) as PersistedChatEntry[];
+
+        for (const row of rows) {
+          store.delete(row.storageKey);
+        }
+
+        await this.waitForTransaction(transaction);
+      });
+    } catch (error) {
+      console.warn('Could not delete chat conversation.', error);
+    }
+  }
+
   private addSystemMessage(peerId: string, text: string): void {
     const id = crypto.randomUUID();
 

client/src/app/home-page.component.html

@@ -25,7 +25,7 @@
               <div class="h4 mb-1">{{ user.displayName }}</div>
               <div class="text-secondary mb-3">{{ user.username }}</div>
               <div class="small status-pill mb-3">{{ session.status() }}</div>
-              <button class="btn btn-accent w-100 mb-2" type="button" [disabled]="!canOpenChatUi()" (click)="openChatUi()">
+              <button class="btn btn-accent w-100 mb-2" type="button" (click)="openChatUi()">
                 Open chat UI
               </button>
               @if (session.isApprovalAdmin()) {

client/src/app/home-page.component.ts

@@ -80,20 +80,17 @@ export class HomePageComponent {
     this.accessKeyLabel = '';
   }
 
-  canOpenChatUi(): boolean {
-    return this.session.peers().length > 0;
-  }
-
   async openChatUi(): Promise<void> {
     const peerId = this.session.activePeerId() ?? this.session.peers()[0]?.id;
 
-    if (!peerId) {
-      this.session.error.set('No connected peers are available yet.');
+    if (peerId) {
+      this.session.selectPeer(peerId);
+      await this.router.navigate(['/chat', peerId]);
       return;
     }
 
-    this.session.selectPeer(peerId);
-    await this.router.navigate(['/chat', peerId]);
+    this.session.error.set(null);
+    await this.router.navigate(['/chat']);
   }
 
   cycleTheme(): void {

client/src/app/json-file-viewer.component.scss

@@ -0,0 +1,31 @@
+:host {
+  display: block;
+  max-width: 95%;
+}
+
+.json-viewer-shell {
+  width: 95%;
+  max-width: 95%;
+  min-width: 0;
+  overflow: hidden;
+  border-radius: 0.9rem;
+  background: rgba(255, 255, 255, 0.06);
+}
+
+.json-viewer-host {
+  max-height: 18rem;
+  max-width: 100%;
+  overflow-x: auto;
+  overflow-y: auto;
+  padding: 0.75rem;
+}
+
+.json-viewer-error {
+  padding: 0 0.75rem 0.75rem;
+  color: inherit;
+  opacity: 0.7;
+}
+
+:host ::ng-deep .json-viewer-host .json-container {
+  min-width: max-content;
+}

client/src/app/json-file-viewer.component.ts

@@ -0,0 +1,101 @@
+import { CommonModule } from '@angular/common';
+import { AfterViewInit, Component, ElementRef, Input, OnChanges, OnDestroy, ViewChild } from '@angular/core';
+
+import type { ChatEntry } from './models';
+
+type JsonViewTree = object;
+
+type JsonViewApi = {
+  renderJSON(value: unknown, container: HTMLElement): JsonViewTree;
+  expand?(tree: JsonViewTree): void;
+  destroy?(tree: JsonViewTree): void;
+};
+
+declare global {
+  interface Window {
+    jsonview?: JsonViewApi;
+  }
+}
+
+@Component({
+  selector: 'app-json-file-viewer',
+  imports: [CommonModule],
+  template: `
+    <div class="json-viewer-shell">
+      <div #host class="json-viewer-host"></div>
+      @if (errorMessage) {
+        <p class="json-viewer-error mb-0">{{ errorMessage }}</p>
+      }
+    </div>
+  `,
+  styleUrl: './json-file-viewer.component.scss',
+})
+export class JsonFileViewerComponent implements AfterViewInit, OnChanges, OnDestroy {
+  @Input({ required: true }) entry!: ChatEntry;
+  @ViewChild('host') private readonly host?: ElementRef<HTMLDivElement>;
+
+  errorMessage: string | null = null;
+  private renderedTree: JsonViewTree | null = null;
+  private renderVersion = 0;
+
+  ngAfterViewInit(): void {
+    void this.renderJsonTree();
+  }
+
+  ngOnChanges(): void {
+    void this.renderJsonTree();
+  }
+
+  ngOnDestroy(): void {
+    this.destroyRenderedTree();
+  }
+
+  private async renderJsonTree(): Promise<void> {
+    const host = this.host?.nativeElement;
+
+    if (!host || !this.entry.downloadUrl) {
+      return;
+    }
+
+    const renderVersion = ++this.renderVersion;
+    const jsonview = window.jsonview;
+
+    this.destroyRenderedTree();
+    host.replaceChildren();
+    this.errorMessage = null;
+
+    if (!jsonview) {
+      this.errorMessage = 'JSON viewer unavailable.';
+      return;
+    }
+
+    try {
+      const response = await fetch(this.entry.downloadUrl);
+      const content = await response.text();
+      const parsed = JSON.parse(content);
+
+      if (renderVersion !== this.renderVersion) {
+        return;
+      }
+
+      const tree = jsonview.renderJSON(parsed, host);
+      jsonview.expand?.(tree);
+      this.renderedTree = tree;
+    } catch {
+      if (renderVersion !== this.renderVersion) {
+        return;
+      }
+
+      this.errorMessage = 'Could not render JSON preview.';
+    }
+  }
+
+  private destroyRenderedTree(): void {
+    if (!this.renderedTree) {
+      return;
+    }
+
+    window.jsonview?.destroy?.(this.renderedTree);
+    this.renderedTree = null;
+  }
+}