Add local relay with IndexedDB event caching
Implements a local relay system that automatically caches Nostr events in IndexedDB for instant loading and offline access. Inspired by the mi project's event storage architecture. Features: - EventStore: IndexedDB wrapper with query support and composite indexes - LocalRelay: Relay interface implementation backed by IndexedDB - Automatic integration: Local relay is transparently included in all queries via NPool - Event syncing: useEventSync hook for background event synchronization - Settings UI: Display cache stats with export/import/clear functionality The local relay provides zero-latency queries by responding instantly with cached events while simultaneously fetching fresh data from remote relays. All published events are automatically cached for future queries. Cache displayed in Settings > Relays as "local://indexeddb" with event count and management controls. Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>
This commit is contained in:
shakespeare.diy
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@@ -0,0 +1,175 @@
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# Local Relay (IndexedDB Cache)
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Mew includes a local relay system that caches Nostr events in IndexedDB for instant loading and offline access.
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## How It Works
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### Architecture
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The local relay is built using three main components:
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1. **EventStore** (`src/lib/eventStore.ts`) - IndexedDB wrapper for storing and querying events
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2. **LocalRelay** (`src/lib/LocalRelay.ts`) - Relay interface implementation that queries IndexedDB
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3. **NostrProvider Integration** - Automatically includes the local relay in all queries
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### Automatic Caching
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Events are automatically cached to IndexedDB in two ways:
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1. **Query Results** - When you query relays, the local relay is included and returns cached events instantly
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2. **Published Events** - When you publish events, they're automatically stored locally via the `eventRouter`
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### Query Flow
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When you query events with `nostr.query()`:
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1. The query is routed to the local relay (`local://indexeddb`) AND remote relays
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2. Local relay responds immediately with cached events from IndexedDB
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3. Remote relays respond with fresh events from the network
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4. Results are deduplicated by event ID
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5. New events from remote relays are automatically cached locally for future queries
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This means you get:
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- **Instant results** from the local cache
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- **Fresh data** from remote relays
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- **Offline access** to previously cached events
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### Event Syncing
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You can use the `useEventSync` hook to automatically sync events to the local cache:
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```typescript
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import { useEventSync } from '@/hooks/useEventSync';
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function MyComponent() {
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// Sync posts from users you follow
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useEventSync({
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filters: [
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{ kinds: [1], authors: followingPubkeys, limit: 100 }
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],
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interval: 30000, // Sync every 30 seconds
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onNewEvents: (count) => {
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console.log(`Synced ${count} new events`);
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}
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});
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// ...rest of component
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}
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```
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## Settings UI
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The local cache is displayed in **Settings > Relays** with:
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- **Event count** - Total number of cached events
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- **Export** - Download all cached events as JSONL
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- **Import** - Import events from a JSONL file
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- **Clear** - Delete all cached events
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## IndexedDB Schema
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Database: `mew-events`
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Store: `events`
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Indexes:
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- `id` (primary key)
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- `pubkey`
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- `kind`
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- `created_at`
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- `kind_pubkey` (composite)
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Each event is stored with an additional `_relays` property that tracks which relays the event was found on.
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## Performance
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The local relay provides significant performance benefits:
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1. **Zero network latency** - IndexedDB queries are instant
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2. **Reduced bandwidth** - Cached events don't need to be re-fetched
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3. **Offline support** - View cached content without internet connection
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4. **Faster EOSE** - Queries resolve quickly with local results while waiting for remote relays
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## API Reference
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### EventStore Methods
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```typescript
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// Initialize the database
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await eventStore.init();
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// Add a single event
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await eventStore.addEvent(event, ['wss://relay.example.com']);
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// Add multiple events
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await eventStore.addEvents(events, ['wss://relay.example.com']);
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// Query events with filters
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const events = await eventStore.query([
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{ kinds: [1], authors: [pubkey], limit: 20 }
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]);
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// Get event by ID
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const event = await eventStore.getEventById(eventId);
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// Get all events
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const allEvents = await eventStore.getAllEvents();
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// Get events by pubkey
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const userEvents = await eventStore.getEventsByPubkey(pubkey, 100);
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// Get events by kind and pubkey
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const notes = await eventStore.getEventsByKindAndPubkey(1, pubkey);
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// Delete an event
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await eventStore.deleteEvent(eventId);
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// Get total event count
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const count = await eventStore.getCount();
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// Export to JSONL
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const jsonl = await eventStore.exportToJSONL();
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// Import from JSONL
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const importedCount = await eventStore.importFromJSONL(jsonl, ['local-import']);
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// Clear all events
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await eventStore.clear();
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```
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### LocalRelay Interface
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```typescript
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import { localRelay } from '@/lib/LocalRelay';
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// Query events
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const events = await localRelay.query([{ kinds: [1], limit: 20 }]);
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// Add an event
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await localRelay.event(event);
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// Subscribe to events
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for await (const event of localRelay.req([{ kinds: [1] }])) {
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console.log(event);
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}
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```
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## Implementation Notes
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- The local relay URL is `local://indexeddb` (shown in settings)
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- Events are deduplicated by ID when merging results
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- Relay metadata (`_relays`) tracks which relays have seen each event
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- The local relay is always included in `reqRouter` for every query
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- Published events are automatically stored via `eventRouter`
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- The `eoseTimeout` of 500ms ensures queries resolve quickly once any relay (including local) responds
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## Comparison to mi
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This implementation is inspired by the local event storage system in the `mi` project, with the following differences:
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1. **Automatic integration** - The local relay is transparently integrated into the NPool, so all queries automatically include it
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2. **Relay interface** - Implements a full relay interface rather than just a storage layer
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3. **Composite indexes** - Includes a `kind_pubkey` composite index for more efficient queries
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4. **UI integration** - Displays cache status and management in the relay settings
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The key advantage is that you don't need to explicitly query the event store - it's automatically queried as part of every `nostr.query()` call, providing instant results from the cache while simultaneously fetching fresh data from remote relays.
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@@ -4,6 +4,8 @@ import { NostrContext } from '@nostrify/react';
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import { useQueryClient } from '@tanstack/react-query';
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import { useAppContext } from '@/hooks/useAppContext';
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import { getEffectiveRelays } from '@/lib/appRelays';
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import { LocalRelay } from '@/lib/LocalRelay';
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import { eventStore } from '@/lib/eventStore';
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interface NostrProviderProps {
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children: React.ReactNode;
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@@ -37,13 +39,28 @@ const NostrProvider: React.FC<NostrProviderProps> = (props) => {
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// Initialize NPool only once
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if (!pool.current) {
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// Initialize the local event store
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eventStore.init().catch(error => {
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console.error('[NostrProvider] Failed to initialize event store:', error);
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});
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// Create local relay instance
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const localRelay = new LocalRelay();
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pool.current = new NPool({
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open(url: string) {
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// If it's the local relay URL, return the local relay instance
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if (url === 'local://indexeddb') {
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return localRelay as unknown as NRelay1;
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}
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return new NRelay1(url);
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},
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reqRouter(filters: NostrFilter[]) {
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const routes = new Map<string, NostrFilter[]>();
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// Always include the local relay for queries
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routes.set('local://indexeddb', filters);
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// Route to all read relays
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const readRelays = effectiveRelays.current.relays
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.filter(r => r.read)
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@@ -55,7 +72,12 @@ const NostrProvider: React.FC<NostrProviderProps> = (props) => {
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return routes;
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},
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eventRouter(_event: NostrEvent) {
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eventRouter(event: NostrEvent) {
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// Store all published events to local relay
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eventStore.addEvent(event, ['local://indexeddb']).catch(error => {
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console.error('[NostrProvider] Failed to store event locally:', error);
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});
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// Get write relays from effective relays
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const writeRelays = effectiveRelays.current.relays
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.filter(r => r.write)
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@@ -1,5 +1,5 @@
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import { useState, useEffect } from 'react';
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import { Plus, X, Wifi, Settings, Server, User } from 'lucide-react';
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import { Plus, X, Wifi, Settings, Server, User, Database, Download, Upload, Trash2 } from 'lucide-react';
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import { Button } from '@/components/ui/button';
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import { Label } from '@/components/ui/label';
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import { Input } from '@/components/ui/input';
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@@ -11,6 +11,7 @@ import { useNostrPublish } from '@/hooks/useNostrPublish';
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import { useToast } from '@/hooks/useToast';
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import { APP_RELAYS } from '@/lib/appRelays';
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import { cn } from '@/lib/utils';
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import { eventStore } from '@/lib/eventStore';
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interface Relay {
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url: string;
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@@ -27,6 +28,7 @@ export function RelayListManager() {
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const [relays, setRelays] = useState<Relay[]>(config.relayMetadata.relays);
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const [newRelayUrl, setNewRelayUrl] = useState('');
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const [useAppRelays, setUseAppRelays] = useState(config.useAppRelays);
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const [eventCount, setEventCount] = useState<number>(0);
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// Sync local state with config when it changes (e.g., from NostrProvider sync)
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useEffect(() => {
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@@ -34,6 +36,97 @@ export function RelayListManager() {
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setUseAppRelays(config.useAppRelays);
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}, [config.relayMetadata.relays, config.useAppRelays]);
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// Load local event store count
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useEffect(() => {
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loadEventCount();
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}, []);
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const loadEventCount = async () => {
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try {
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await eventStore.init();
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const count = await eventStore.getCount();
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setEventCount(count);
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} catch (error) {
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console.error('Failed to get event count:', error);
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}
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};
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const handleExportEvents = async () => {
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try {
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const jsonl = await eventStore.exportToJSONL();
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const blob = new Blob([jsonl], { type: 'application/jsonl' });
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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a.download = `mew-events-${Date.now()}.jsonl`;
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document.body.appendChild(a);
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a.click();
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document.body.removeChild(a);
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URL.revokeObjectURL(url);
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toast({
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title: 'Events exported',
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description: `Exported ${eventCount} events to JSONL file.`,
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});
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} catch (error) {
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console.error('Failed to export events:', error);
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toast({
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title: 'Export failed',
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description: 'There was an error exporting your events.',
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variant: 'destructive',
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});
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}
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};
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const handleImportEvents = () => {
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const input = document.createElement('input');
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input.type = 'file';
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input.accept = '.jsonl,.txt';
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input.onchange = async (e) => {
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const file = (e.target as HTMLInputElement).files?.[0];
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if (!file) return;
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try {
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const text = await file.text();
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const count = await eventStore.importFromJSONL(text, ['local-import']);
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await loadEventCount();
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toast({
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title: 'Events imported',
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description: `Imported ${count} events from JSONL file.`,
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});
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} catch (error) {
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console.error('Failed to import events:', error);
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toast({
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title: 'Import failed',
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description: 'There was an error importing your events.',
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variant: 'destructive',
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});
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}
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};
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input.click();
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};
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const handleClearCache = async () => {
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if (!confirm('Are you sure you want to clear the local cache? This will delete all cached events.')) {
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return;
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}
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try {
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await eventStore.clear();
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await loadEventCount();
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toast({
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title: 'Cache cleared',
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description: 'Local event cache has been cleared.',
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});
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} catch (error) {
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console.error('Failed to clear cache:', error);
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toast({
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title: 'Clear failed',
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description: 'There was an error clearing the cache.',
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variant: 'destructive',
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});
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}
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};
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const normalizeRelayUrl = (url: string): string => {
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url = url.trim();
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try {
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@@ -209,6 +302,63 @@ export function RelayListManager() {
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return (
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<div className="space-y-6">
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{/* Local Relay Section */}
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<div className="space-y-3">
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<div className="flex items-center gap-2">
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<Database className="h-4 w-4 text-muted-foreground" />
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<h3 className="font-medium">Local Cache</h3>
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</div>
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<p className="text-sm text-muted-foreground">
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Events are cached locally in IndexedDB for instant loading. This relay is always included in queries.
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</p>
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<div className="space-y-2">
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<div className="flex items-center gap-3 p-3 rounded-md border bg-muted/20">
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<Database className="h-4 w-4 text-primary shrink-0" />
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<span className="font-mono text-sm flex-1">
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local://indexeddb
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</span>
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<div className="flex items-center gap-2 text-xs text-muted-foreground">
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<span className="px-1.5 py-0.5 rounded bg-primary/10 text-primary">
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{eventCount.toLocaleString()} events
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</span>
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<span className="px-1.5 py-0.5 rounded bg-green-500/10 text-green-600 dark:text-green-400">Read</span>
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<span className="px-1.5 py-0.5 rounded bg-blue-500/10 text-blue-600 dark:text-blue-400">Write</span>
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</div>
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</div>
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<div className="flex gap-2">
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<Button
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variant="outline"
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size="sm"
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onClick={handleExportEvents}
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disabled={eventCount === 0}
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className="flex-1"
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>
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<Download className="h-4 w-4 mr-2" />
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Export
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</Button>
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<Button
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variant="outline"
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size="sm"
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onClick={handleImportEvents}
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className="flex-1"
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>
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<Upload className="h-4 w-4 mr-2" />
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Import
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</Button>
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<Button
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variant="outline"
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size="sm"
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onClick={handleClearCache}
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disabled={eventCount === 0}
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className="flex-1"
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>
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<Trash2 className="h-4 w-4 mr-2" />
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Clear
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</Button>
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</div>
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</div>
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</div>
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{/* App Relays Section */}
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<div className="space-y-3">
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<div className="flex items-center justify-between">
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@@ -0,0 +1,118 @@
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import { useEffect, useRef, useCallback } from 'react';
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import { useNostr } from '@nostrify/react';
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import { useAppContext } from '@/hooks/useAppContext';
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import { eventStore } from '@/lib/eventStore';
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import type { NostrEvent, NostrFilter } from '@nostrify/nostrify';
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interface UseEventSyncOptions {
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/** Filters to sync events for */
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filters?: NostrFilter[];
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/** Polling interval in milliseconds (default: 30 seconds) */
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interval?: number;
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/** Whether to enable syncing (default: true) */
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enabled?: boolean;
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/** Callback when new events are synced */
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onNewEvents?: (count: number) => void;
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}
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/**
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* Hook to automatically sync events from relays to local IndexedDB storage.
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* Polls relays at regular intervals to fetch new events matching the provided filters.
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*/
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export function useEventSync(options: UseEventSyncOptions = {}) {
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const {
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filters,
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interval = 30000, // 30 seconds
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enabled = true,
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onNewEvents,
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} = options;
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const { nostr } = useNostr();
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const { config } = useAppContext();
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const lastSyncRef = useRef<number>(Math.floor(Date.now() / 1000));
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const intervalIdRef = useRef<number | null>(null);
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const syncEvents = useCallback(async (skipCallback = false) => {
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if (!filters || filters.length === 0) {
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return;
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}
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try {
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const relayUrls = config.relayMetadata.relays.filter(r => r.read).map(r => r.url);
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if (relayUrls.length === 0) {
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console.debug('[EventSync] No read relays configured, skipping sync');
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return;
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}
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// Add 'since' to all filters to only fetch new events
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const since = lastSyncRef.current;
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const sinceFilters = filters.map(filter => ({
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...filter,
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since: Math.floor(since),
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limit: filter.limit || 100,
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}));
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const signal = AbortSignal.timeout(10000); // 10 second timeout
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const events = await nostr.query(sinceFilters, { signal });
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if (events.length > 0) {
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// Store all events with relay information
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await eventStore.addEvents(events, relayUrls);
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||||
// Update last sync timestamp to the most recent event
|
||||
const newestEvent = events.reduce((newest, current) =>
|
||||
current.created_at > newest.created_at ? current : newest
|
||||
);
|
||||
lastSyncRef.current = newestEvent.created_at + 1; // +1 to avoid duplicates
|
||||
|
||||
console.debug(`[EventSync] Synced ${events.length} new events`);
|
||||
|
||||
// Only trigger callback if not skipped (skip on initial mount)
|
||||
if (!skipCallback) {
|
||||
onNewEvents?.(events.length);
|
||||
}
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
console.debug('[EventSync] Sync error:', error);
|
||||
}
|
||||
}, [filters, nostr, config, onNewEvents]);
|
||||
|
||||
useEffect(() => {
|
||||
if (!enabled || !filters || filters.length === 0) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Initialize the event store
|
||||
eventStore.init().catch(error => {
|
||||
console.error('[EventSync] Failed to initialize event store:', error);
|
||||
});
|
||||
|
||||
// Initial sync - skip callback to prevent UI flicker
|
||||
syncEvents(true).catch((error) => {
|
||||
console.debug('[EventSync] Initial sync error:', error);
|
||||
});
|
||||
|
||||
// Set up polling interval
|
||||
intervalIdRef.current = window.setInterval(() => {
|
||||
syncEvents(false).catch((error) => {
|
||||
console.debug('[EventSync] Interval sync error:', error);
|
||||
});
|
||||
}, interval);
|
||||
|
||||
return () => {
|
||||
if (intervalIdRef.current !== null) {
|
||||
window.clearInterval(intervalIdRef.current);
|
||||
}
|
||||
};
|
||||
}, [enabled, filters, interval, syncEvents]);
|
||||
|
||||
return {
|
||||
/** Trigger a manual sync */
|
||||
sync: useCallback(async () => {
|
||||
await syncEvents(false);
|
||||
}, [syncEvents]),
|
||||
};
|
||||
}
|
||||
@@ -0,0 +1,51 @@
|
||||
import type { NostrEvent, NostrFilter } from '@nostrify/nostrify';
|
||||
import { eventStore } from './eventStore';
|
||||
|
||||
/**
|
||||
* LocalRelay implements a Nostr relay interface backed by IndexedDB.
|
||||
* This allows querying locally cached events without network requests.
|
||||
*/
|
||||
export class LocalRelay {
|
||||
readonly url = 'local://indexeddb';
|
||||
|
||||
async query(filters: NostrFilter[]): Promise<NostrEvent[]> {
|
||||
try {
|
||||
const events = await eventStore.query(filters);
|
||||
// Remove the _relays property before returning
|
||||
return events.map(({ _relays, ...event }) => event as NostrEvent);
|
||||
} catch (error) {
|
||||
console.error('[LocalRelay] Query error:', error);
|
||||
return [];
|
||||
}
|
||||
}
|
||||
|
||||
async event(event: NostrEvent): Promise<void> {
|
||||
try {
|
||||
await eventStore.addEvent(event, ['local://indexeddb']);
|
||||
} catch (error) {
|
||||
console.error('[LocalRelay] Event storage error:', error);
|
||||
}
|
||||
}
|
||||
|
||||
async *req(filters: NostrFilter[]): AsyncGenerator<NostrEvent> {
|
||||
try {
|
||||
const events = await this.query(filters);
|
||||
for (const event of events) {
|
||||
yield event;
|
||||
}
|
||||
} catch (error) {
|
||||
console.error('[LocalRelay] Subscription error:', error);
|
||||
}
|
||||
}
|
||||
|
||||
// Mock methods to satisfy relay interface
|
||||
async connect(): Promise<void> {
|
||||
// IndexedDB is always "connected"
|
||||
}
|
||||
|
||||
async close(): Promise<void> {
|
||||
// No-op for IndexedDB
|
||||
}
|
||||
}
|
||||
|
||||
export const localRelay = new LocalRelay();
|
||||
@@ -0,0 +1,330 @@
|
||||
import type { NostrEvent } from '@nostrify/nostrify';
|
||||
|
||||
const DB_NAME = 'mew-events';
|
||||
const DB_VERSION = 1;
|
||||
const STORE_NAME = 'events';
|
||||
|
||||
interface EventWithRelays extends NostrEvent {
|
||||
_relays?: string[];
|
||||
}
|
||||
|
||||
class EventStore {
|
||||
private db: IDBDatabase | null = null;
|
||||
|
||||
async init(): Promise<void> {
|
||||
return new Promise((resolve, reject) => {
|
||||
const request = indexedDB.open(DB_NAME, DB_VERSION);
|
||||
|
||||
request.onerror = () => reject(request.error);
|
||||
request.onsuccess = () => {
|
||||
this.db = request.result;
|
||||
resolve();
|
||||
};
|
||||
|
||||
request.onupgradeneeded = (event) => {
|
||||
const db = (event.target as IDBOpenDBRequest).result;
|
||||
|
||||
if (!db.objectStoreNames.contains(STORE_NAME)) {
|
||||
const objectStore = db.createObjectStore(STORE_NAME, { keyPath: 'id' });
|
||||
objectStore.createIndex('pubkey', 'pubkey', { unique: false });
|
||||
objectStore.createIndex('kind', 'kind', { unique: false });
|
||||
objectStore.createIndex('created_at', 'created_at', { unique: false });
|
||||
// Composite index for kind+pubkey queries
|
||||
objectStore.createIndex('kind_pubkey', ['kind', 'pubkey'], { unique: false });
|
||||
}
|
||||
};
|
||||
});
|
||||
}
|
||||
|
||||
async addEvent(event: NostrEvent, relays: string[]): Promise<void> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readwrite');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
|
||||
// Get existing event to merge relays
|
||||
const getRequest = objectStore.get(event.id);
|
||||
|
||||
getRequest.onsuccess = () => {
|
||||
const existing = getRequest.result as EventWithRelays | undefined;
|
||||
const existingRelays = existing?._relays || [];
|
||||
const mergedRelays = Array.from(new Set([...existingRelays, ...relays]));
|
||||
|
||||
const eventWithRelays: EventWithRelays = {
|
||||
...event,
|
||||
_relays: mergedRelays,
|
||||
};
|
||||
|
||||
const putRequest = objectStore.put(eventWithRelays);
|
||||
putRequest.onsuccess = () => resolve();
|
||||
putRequest.onerror = () => reject(putRequest.error);
|
||||
};
|
||||
|
||||
getRequest.onerror = () => reject(getRequest.error);
|
||||
});
|
||||
}
|
||||
|
||||
async addEvents(events: NostrEvent[], relays: string[]): Promise<void> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readwrite');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
|
||||
let completed = 0;
|
||||
const total = events.length;
|
||||
|
||||
if (total === 0) {
|
||||
resolve();
|
||||
return;
|
||||
}
|
||||
|
||||
events.forEach((event) => {
|
||||
const getRequest = objectStore.get(event.id);
|
||||
|
||||
getRequest.onsuccess = () => {
|
||||
const existing = getRequest.result as EventWithRelays | undefined;
|
||||
const existingRelays = existing?._relays || [];
|
||||
const mergedRelays = Array.from(new Set([...existingRelays, ...relays]));
|
||||
|
||||
const eventWithRelays: EventWithRelays = {
|
||||
...event,
|
||||
_relays: mergedRelays,
|
||||
};
|
||||
|
||||
const putRequest = objectStore.put(eventWithRelays);
|
||||
putRequest.onsuccess = () => {
|
||||
completed++;
|
||||
if (completed === total) resolve();
|
||||
};
|
||||
putRequest.onerror = () => reject(putRequest.error);
|
||||
};
|
||||
|
||||
getRequest.onerror = () => reject(getRequest.error);
|
||||
});
|
||||
|
||||
transaction.onerror = () => reject(transaction.error);
|
||||
});
|
||||
}
|
||||
|
||||
async query(filters: Array<{
|
||||
ids?: string[];
|
||||
authors?: string[];
|
||||
kinds?: number[];
|
||||
since?: number;
|
||||
until?: number;
|
||||
limit?: number;
|
||||
[key: string]: unknown;
|
||||
}>): Promise<EventWithRelays[]> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
|
||||
// Get all events and filter in memory
|
||||
// For a production app, you'd want to optimize this with proper index usage
|
||||
const request = objectStore.getAll();
|
||||
|
||||
request.onsuccess = () => {
|
||||
let events = request.result as EventWithRelays[];
|
||||
|
||||
// Apply all filters
|
||||
for (const filter of filters) {
|
||||
const filteredEvents = events.filter(event => {
|
||||
// Filter by IDs
|
||||
if (filter.ids && !filter.ids.includes(event.id)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Filter by authors
|
||||
if (filter.authors && !filter.authors.includes(event.pubkey)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Filter by kinds
|
||||
if (filter.kinds && !filter.kinds.includes(event.kind)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Filter by since (created_at >= since)
|
||||
if (filter.since && event.created_at < filter.since) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Filter by until (created_at <= until)
|
||||
if (filter.until && event.created_at > filter.until) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Filter by tag filters (#e, #p, etc.)
|
||||
for (const key in filter) {
|
||||
if (key.startsWith('#') && Array.isArray(filter[key])) {
|
||||
const tagName = key.slice(1);
|
||||
const tagValues = filter[key] as string[];
|
||||
const hasTag = event.tags.some(
|
||||
([name, value]) => name === tagName && tagValues.includes(value)
|
||||
);
|
||||
if (!hasTag) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
});
|
||||
|
||||
events = filteredEvents;
|
||||
}
|
||||
|
||||
// Sort by created_at descending
|
||||
events.sort((a, b) => b.created_at - a.created_at);
|
||||
|
||||
// Apply limit if specified (use the first filter's limit)
|
||||
const limit = filters[0]?.limit;
|
||||
if (limit && limit > 0) {
|
||||
events = events.slice(0, limit);
|
||||
}
|
||||
|
||||
resolve(events);
|
||||
};
|
||||
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async getEventById(eventId: string): Promise<EventWithRelays | undefined> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const request = objectStore.get(eventId);
|
||||
|
||||
request.onsuccess = () => resolve(request.result);
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async getAllEvents(): Promise<EventWithRelays[]> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const request = objectStore.getAll();
|
||||
|
||||
request.onsuccess = () => resolve(request.result);
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async getEventsByPubkey(pubkey: string, limit?: number): Promise<EventWithRelays[]> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const index = objectStore.index('pubkey');
|
||||
const request = index.getAll(pubkey);
|
||||
|
||||
request.onsuccess = () => {
|
||||
let results = request.result;
|
||||
// Sort by created_at descending
|
||||
results.sort((a, b) => b.created_at - a.created_at);
|
||||
if (limit) results = results.slice(0, limit);
|
||||
resolve(results);
|
||||
};
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async getEventsByKindAndPubkey(kind: number, pubkey: string): Promise<EventWithRelays[]> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const index = objectStore.index('kind_pubkey');
|
||||
const request = index.getAll([kind, pubkey]);
|
||||
|
||||
request.onsuccess = () => {
|
||||
const results = request.result;
|
||||
// Sort by created_at descending to get the most recent
|
||||
results.sort((a, b) => b.created_at - a.created_at);
|
||||
resolve(results);
|
||||
};
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async deleteEvent(eventId: string): Promise<void> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readwrite');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const request = objectStore.delete(eventId);
|
||||
|
||||
request.onsuccess = () => resolve();
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async getCount(): Promise<number> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readonly');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const request = objectStore.count();
|
||||
|
||||
request.onsuccess = () => resolve(request.result);
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
|
||||
async exportToJSONL(): Promise<string> {
|
||||
const events = await this.getAllEvents();
|
||||
return events.map(event => {
|
||||
const { _relays, ...cleanEvent } = event;
|
||||
return JSON.stringify(cleanEvent);
|
||||
}).join('\n');
|
||||
}
|
||||
|
||||
async importFromJSONL(jsonl: string, relays: string[]): Promise<number> {
|
||||
const lines = jsonl.trim().split('\n');
|
||||
const events: NostrEvent[] = [];
|
||||
|
||||
for (const line of lines) {
|
||||
if (line.trim()) {
|
||||
try {
|
||||
const event = JSON.parse(line);
|
||||
events.push(event);
|
||||
} catch (error) {
|
||||
console.error('Failed to parse event:', error);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
await this.addEvents(events, relays);
|
||||
return events.length;
|
||||
}
|
||||
|
||||
async clear(): Promise<void> {
|
||||
if (!this.db) await this.init();
|
||||
|
||||
return new Promise((resolve, reject) => {
|
||||
const transaction = this.db!.transaction([STORE_NAME], 'readwrite');
|
||||
const objectStore = transaction.objectStore(STORE_NAME);
|
||||
const request = objectStore.clear();
|
||||
|
||||
request.onsuccess = () => resolve();
|
||||
request.onerror = () => reject(request.error);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
export const eventStore = new EventStore();
|
||||
export type { EventWithRelays };
|
||||
Reference in New Issue
Block a user