feat: migrate from Redis to SQLite for event handling and notifications

scripts/migrate-db.ts

@@ -0,0 +1,53 @@
+#!/usr/bin/env bun
+/**
+ * Database migration script to add the events table
+ * This script should be run when upgrading from a version that used Redis
+ */
+
+import { Database } from "bun:sqlite";
+import fs from "fs";
+import path from "path";
+
+// Define the database path
+const dataDir = path.join(process.cwd(), "data");
+if (!fs.existsSync(dataDir)) {
+  fs.mkdirSync(dataDir, { recursive: true });
+}
+
+const dbPath = path.join(dataDir, "gitea-mirror.db");
+if (!fs.existsSync(dbPath)) {
+  console.error("Database file not found:", dbPath);
+  process.exit(1);
+}
+
+// Open the database
+const db = new Database(dbPath);
+
+// Check if the events table already exists
+const tableExists = db.query("SELECT name FROM sqlite_master WHERE type='table' AND name='events'").get();
+
+if (tableExists) {
+  console.log("Events table already exists, skipping migration");
+  process.exit(0);
+}
+
+// Create the events table
+console.log("Creating events table...");
+db.exec(`
+CREATE TABLE events (
+  id TEXT PRIMARY KEY,
+  user_id TEXT NOT NULL,
+  channel TEXT NOT NULL,
+  payload TEXT NOT NULL,
+  read INTEGER NOT NULL DEFAULT 0,
+  created_at INTEGER NOT NULL DEFAULT (unixepoch()),
+  FOREIGN KEY (user_id) REFERENCES users(id)
+);
+
+-- Create indexes for efficient querying
+CREATE INDEX idx_events_user_channel ON events(user_id, channel);
+CREATE INDEX idx_events_created_at ON events(created_at);
+CREATE INDEX idx_events_read ON events(read);
+`);
+
+console.log("Migration completed successfully");