feat: add MockAdapter passing the conformance suite

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/iios-messaging-ui/src/adapters/mock.ts

@@ -0,0 +1,168 @@
+import type { MessagingAdapter } from '../adapter';
+import type {
+  Attachment,
+  Conversation,
+  Membership,
+  Message,
+  MessageEvent,
+  Person,
+  SendOpts,
+  Unsubscribe,
+} from '../types';
+
+const ME = 'me';
+
+export const MOCK_PEOPLE: Person[] = [
+  { id: 'pp_sofia', name: 'Sofia Ramirez', kind: 'staff' },
+  { id: 'pp_dan', name: 'Dan Whitaker', kind: 'staff' },
+  { id: 'pp_priya', name: 'Priya Nair', kind: 'staff' },
+  { id: 'cust_acme', name: 'Acme Roofing (Client)', kind: 'customer' },
+  { id: 'cust_globex', name: 'Globex Homes (Client)', kind: 'customer' },
+];
+
+interface MockThread {
+  threadId: string;
+  membership: Membership;
+  subject: string | null;
+  participants: string[];
+  messages: Message[];
+}
+
+const nameById = new Map(MOCK_PEOPLE.map((p) => [p.id, p.name]));
+
+/**
+ * In-memory adapter for demos and tests. State is PER INSTANCE — the CRM's version
+ * used a module-level Map, which leaks between tests. Each `new MockAdapter()` is
+ * fully isolated.
+ */
+export class MockAdapter implements MessagingAdapter {
+  private seq = 100;
+  private threads = new Map<string, MockThread>();
+  private listeners = new Map<string, Set<(e: MessageEvent) => void>>();
+
+  constructor(private readonly now: () => string = () => new Date().toISOString()) {
+    const seededAt = this.now();
+    this.threads.set('th_mock_1', {
+      threadId: 'th_mock_1',
+      membership: 'dm',
+      subject: null,
+      participants: [ME, 'pp_sofia'],
+      messages: [
+        {
+          id: 'm1',
+          actorId: 'pp_sofia',
+          text: 'Can you review the Henderson estimate?',
+          at: seededAt,
+          reactions: [],
+        },
+      ],
+    });
+    this.threads.set('th_mock_2', {
+      threadId: 'th_mock_2',
+      membership: 'group',
+      subject: 'Storm response — East side',
+      participants: [ME, 'pp_dan', 'pp_priya'],
+      messages: [
+        { id: 'm2', actorId: 'pp_dan', text: 'Crew is rolling out at 7.', at: seededAt, reactions: [] },
+      ],
+    });
+  }
+
+  currentActorId(): string {
+    return ME;
+  }
+
+  async listConversations(): Promise<Conversation[]> {
+    return [...this.threads.values()].map((t) => {
+      const last = t.messages[t.messages.length - 1];
+      const others = t.participants.filter((p) => p !== ME);
+      return {
+        threadId: t.threadId,
+        title: t.subject || others.map((id) => nameById.get(id) ?? id).join(', ') || 'Conversation',
+        subject: t.subject,
+        membership: t.membership,
+        participants: [...t.participants],
+        unread: 0,
+        ...(last ? { lastMessage: last.text, lastAt: last.at } : {}),
+      };
+    });
+  }
+
+  async openThread(p: { participantIds: string[]; membership?: Membership; subject?: string }): Promise<{ threadId: string }> {
+    const membership = p.membership ?? (p.participantIds.length === 1 ? 'dm' : 'group');
+    const threadId = `th_mock_${this.seq++}`;
+    this.threads.set(threadId, {
+      threadId,
+      membership,
+      subject: p.subject ?? null,
+      participants: [ME, ...p.participantIds],
+      messages: [],
+    });
+    return { threadId };
+  }
+
+  async history(threadId: string): Promise<Message[]> {
+    return [...(this.threads.get(threadId)?.messages ?? [])];
+  }
+
+  async send(threadId: string, content: string, opts?: SendOpts): Promise<Message> {
+    const t = this.threads.get(threadId);
+    if (!t) throw new Error(`Unknown thread: ${threadId}`);
+    const message: Message = {
+      id: `m_${this.seq++}`,
+      actorId: ME,
+      text: content,
+      at: this.now(),
+      reactions: [],
+      ...(opts?.parentInteractionId ? { parentInteractionId: opts.parentInteractionId } : {}),
+      ...(opts?.attachment ? { attachment: opts.attachment } : {}),
+    };
+    t.messages = [...t.messages, message];
+    this.emit(threadId, { kind: 'message', message });
+    return message;
+  }
+
+  async react(threadId: string, messageId: string, emoji: string): Promise<void> {
+    const t = this.threads.get(threadId);
+    if (!t) return;
+    let next: Message | undefined;
+    t.messages = t.messages.map((m) => {
+      if (m.id !== messageId) return m;
+      const existing = (m.reactions ?? []).find((r) => r.emoji === emoji);
+      const reactions = existing
+        ? (m.reactions ?? []).filter((r) => r.emoji !== emoji)
+        : [...(m.reactions ?? []), { emoji, count: 1, mine: true }];
+      next = { ...m, reactions };
+      return next;
+    });
+    if (next) this.emit(threadId, { kind: 'reaction', messageId, reactions: next.reactions ?? [] });
+  }
+
+  async upload(file: File): Promise<Attachment> {
+    return { url: `mock://uploads/${file.name}`, mime: file.type, name: file.name };
+  }
+
+  subscribe(threadId: string, cb: (e: MessageEvent) => void): Unsubscribe {
+    if (!this.listeners.has(threadId)) this.listeners.set(threadId, new Set());
+    this.listeners.get(threadId)!.add(cb);
+    return () => {
+      this.listeners.get(threadId)?.delete(cb);
+    };
+  }
+
+  sendTyping(): void {
+    // No-op: nobody is typing back in a mock.
+  }
+
+  async markRead(): Promise<void> {
+    // No-op: the mock has no second party to report a read.
+  }
+
+  isConnected(): boolean {
+    return true;
+  }
+
+  private emit(threadId: string, e: MessageEvent): void {
+    this.listeners.get(threadId)?.forEach((cb) => cb(e));
+  }
+}

packages/iios-messaging-ui/src/conformance.test.ts

@@ -0,0 +1,8 @@
+import { runAdapterConformance } from './conformance';
+import { MockAdapter } from './adapters/mock';
+
+runAdapterConformance({
+  makeAdapter: () => new MockAdapter(),
+  seededThreadId: 'th_mock_1',
+  openWith: ['pp_sofia'],
+});