JCEEE
258 lines
7.1 KiB
TypeScript
258 lines
7.1 KiB
TypeScript
import { pb } from '$lib/pocketbase';
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import type { ChatMessage, TypingRow } from '$lib/types';
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interface ChatInit {
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famId: string;
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actorId: string;
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actorType: 'admin' | 'member';
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actorName: string;
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actorColor: string;
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deviceToken?: string;
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memberId?: string;
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}
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class ChatStore {
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famId = $state('');
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messages = $state<ChatMessage[]>([]);
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typing = $state<Record<string, TypingRow>>({});
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unread = $state(0);
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open = $state(false);
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initialized = $state(false);
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actorId = $state('');
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actorType = $state<'admin' | 'member'>('member');
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actorName = $state('');
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actorColor = $state('');
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deviceToken = $state('');
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memberId = $state('');
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private unsubs: (() => void)[] = [];
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private destroyed = false;
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private initPromise: Promise<void> | null = null;
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private lastSeenAt = 0;
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private typingTimers = new Map<string, ReturnType<typeof setTimeout>>();
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typingNames = $derived.by(() => {
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const names: string[] = [];
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for (const row of Object.values(this.typing)) {
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if (row.actorId !== this.actorId) names.push(row.authorName);
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}
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return names;
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});
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async init(opts: ChatInit) {
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this.famId = opts.famId;
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this.actorId = opts.actorId;
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this.actorType = opts.actorType;
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this.actorName = opts.actorName;
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this.actorColor = opts.actorColor;
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this.deviceToken = opts.deviceToken || '';
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this.memberId = opts.memberId || '';
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if (this.initialized && this.famId === opts.famId) return;
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if (this.initPromise) {
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await this.initPromise;
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if (this.initialized && this.famId === opts.famId) return;
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}
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this.cleanup();
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this.destroyed = false;
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this.lastSeenAt = Date.now();
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this.initPromise = (async () => {
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try {
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// Last week + this week of history (custom createdAt field — the
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// auto `created` field can't be filtered in this PB version).
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const since = new Date(Date.now() - 14 * 86400000).toISOString();
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const msgs = (await pb.collection('messages').getFullList({
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filter: `famId = '${opts.famId}' && createdAt >= '${since}'`,
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sort: 'createdAt'
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})) as ChatMessage[];
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this.messages = msgs;
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this.initialized = true;
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} catch (e) {
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console.error('ChatStore.init failed:', e);
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this.initPromise = null;
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throw e;
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}
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await this.subscribe();
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this.initPromise = null;
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})();
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return this.initPromise!;
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}
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private async subscribe() {
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const msgSub = pb
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.collection('messages')
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.subscribe('*', (data: any) => {
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if (this.destroyed) return;
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this.onMessage(data.action, data.record);
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})
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.then((unsub) => this.unsubs.push(unsub))
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.catch((err: Error) => console.error('[chatStore] messages subscribe failed:', err));
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const typingSub = pb
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.collection('chat_typing')
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.subscribe('*', (data: any) => {
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if (this.destroyed) return;
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this.onTyping(data.action, data.record);
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})
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.then((unsub) => this.unsubs.push(unsub))
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.catch((err: Error) => console.error('[chatStore] typing subscribe failed:', err));
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await Promise.allSettled([msgSub, typingSub]);
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}
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private onMessage(action: string, record: ChatMessage) {
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if (record.famId !== this.famId) return;
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if (action === 'delete') {
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this.messages = this.messages.filter((m) => m.id !== record.id);
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return;
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}
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if (action === 'update') {
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this.messages = this.messages.map((m) => (m.id === record.id ? { ...m, ...record } : m));
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return;
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}
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// create
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if (!this.messages.some((m) => m.id === record.id)) {
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this.messages = [...this.messages, record].sort((a, b) =>
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a.createdAt.localeCompare(b.createdAt)
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);
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}
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// Stop showing their typing indicator once the message lands.
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this.clearTyping(record.authorId);
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if (record.authorId !== this.actorId && !this.open) {
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this.unread++;
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}
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}
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private onTyping(action: string, record: TypingRow) {
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if (record.famId !== this.famId) return;
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if (action === 'delete') {
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this.removeTyping(record.actorId);
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return;
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}
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if (!record.typing) {
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this.removeTyping(record.actorId);
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return;
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}
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this.typing = { ...this.typing, [record.actorId]: record };
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const prev = this.typingTimers.get(record.actorId);
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if (prev) clearTimeout(prev);
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this.typingTimers.set(
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record.actorId,
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setTimeout(() => this.removeTyping(record.actorId), 5000)
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);
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}
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private clearTyping(actorId: string) {
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if (this.typing[actorId]) this.removeTyping(actorId);
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}
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private removeTyping(actorId: string) {
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if (!this.typing[actorId]) return;
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const next = { ...this.typing };
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delete next[actorId];
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this.typing = next;
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const t = this.typingTimers.get(actorId);
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if (t) clearTimeout(t);
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this.typingTimers.delete(actorId);
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}
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// ── Writes via proxy ──
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private async chatFetch(method: string, path: string, body?: unknown) {
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const headers: Record<string, string> = { 'Content-Type': 'application/json' };
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if (this.actorType === 'member' && this.deviceToken) {
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headers['x-device-token'] = this.deviceToken;
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headers['x-device-famid'] = this.famId;
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}
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const res = await fetch(path, {
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method,
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headers,
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body: body ? JSON.stringify(body) : undefined
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});
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const data = await res.json().catch(() => ({}));
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if (!res.ok) throw new Error(data.error || `${method} ${path} failed`);
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return data;
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}
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async send(content: string) {
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const text = content.trim();
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if (!text || !this.famId) return;
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const temp: ChatMessage = {
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id: 'temp-' + Date.now(),
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famId: this.famId,
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authorType: this.actorType,
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authorId: this.actorId,
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authorName: this.actorName,
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authorColor: this.actorColor,
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content: text,
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createdAt: new Date().toISOString()
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};
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this.messages = [...this.messages, temp];
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this.lastSeenAt = Date.now();
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// Signal we stopped typing (message sent).
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this.setTyping(false).catch(() => {});
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try {
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const saved = await this.chatFetch('POST', `/api/chat/${this.famId}/messages`, {
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content: text
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});
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// SSE may have already delivered the real record via onMessage, so
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// drop both the temp and any pre-existing copy of the saved id to
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// avoid duplicate keys in the keyed each block.
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this.messages = this.messages
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.filter((m) => m.id !== temp.id && m.id !== saved.id)
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.concat([{ ...saved, authorName: temp.authorName, authorColor: temp.authorColor }])
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.sort((a, b) => a.createdAt.localeCompare(b.createdAt));
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} catch (e) {
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this.messages = this.messages.filter((m) => m.id !== temp.id);
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console.error('Chat send failed:', e);
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throw e;
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}
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}
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private typingThrottle = 0;
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async setTyping(typing: boolean) {
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if (!this.famId) return;
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const now = Date.now();
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if (typing && now - this.typingThrottle < 1500) return;
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this.typingThrottle = now;
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try {
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await this.chatFetch('POST', `/api/chat/${this.famId}/typing`, { typing });
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} catch (e) {
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console.error('Chat typing failed:', e);
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}
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}
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toggle() {
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this.open = !this.open;
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if (this.open) {
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this.unread = 0;
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this.lastSeenAt = Date.now();
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}
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}
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openChat() {
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this.open = true;
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this.unread = 0;
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this.lastSeenAt = Date.now();
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}
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closeChat() {
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this.open = false;
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}
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cleanup() {
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this.destroyed = true;
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for (const unsub of this.unsubs) unsub();
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this.unsubs = [];
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for (const t of this.typingTimers.values()) clearTimeout(t);
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this.typingTimers.clear();
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this.initialized = false;
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}
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}
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export const chatStore = new ChatStore();
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