feat(week1): complete foundation - schema, migrations, enhanced SQL, sanitizer

src/lib/db/migrate.ts

@@ -0,0 +1,100 @@
+import { pool } from './db';
+
+/**
+ * Migration System for God Mode
+ * Handles transactional execution of SQL migration files
+ */
+
+export interface MigrationResult {
+    success: boolean;
+    migrationsRun: number;
+    error?: string;
+    rolledBack?: boolean;
+}
+
+/**
+ * Run multiple SQL commands in a single transaction
+ * Automatically rolls back if ANY command fails
+ */
+export async function runMigrations(sqlCommands: string[]): Promise<MigrationResult> {
+    const client = await pool.connect();
+    let migrationsRun = 0;
+
+    try {
+        await client.query('BEGIN');
+        console.log('🔱 [Migration] Starting transaction...');
+
+        for (const command of sqlCommands) {
+            // Skip empty commands or comments
+            const trimmed = command.trim();
+            if (!trimmed || trimmed.startsWith('--')) {
+                continue;
+            }
+
+            console.log(`[Migration] Executing: ${trimmed.substring(0, 100)}...`);
+            await client.query(trimmed);
+            migrationsRun++;
+        }
+
+        await client.query('COMMIT');
+        console.log(`✅ [Migration] Successfully committed ${migrationsRun} migrations`);
+
+        return {
+            success: true,
+            migrationsRun
+        };
+
+    } catch (error: any) {
+        await client.query('ROLLBACK');
+        console.error('❌ [Migration] Error - Rolling back all changes:', error.message);
+
+        return {
+            success: false,
+            migrationsRun,
+            error: error.message,
+            rolledBack: true
+        };
+
+    } finally {
+        client.release();
+    }
+}
+
+/**
+ * Run a single large SQL file (like migrations)
+ * Splits by semicolon and runs each statement in transaction
+ */
+export async function runMigrationFile(sqlContent: string): Promise<MigrationResult> {
+    // Split by semicolon, but be smart about it
+    const statements = sqlContent
+        .split(';')
+        .map(s => s.trim())
+        .filter(s => s.length > 0);
+
+    return runMigrations(statements);
+}
+
+/**
+ * Check if migrations have been run
+ */
+export async function getMigrationStatus(): Promise<{
+    tables: string[];
+    lastMigration?: Date;
+}> {
+    try {
+        const result = await pool.query(`
+            SELECT table_name 
+            FROM information_schema.tables 
+            WHERE table_schema = 'public' 
+            ORDER BY table_name
+        `);
+
+        return {
+            tables: result.rows.map(r => r.table_name)
+        };
+    } catch (error) {
+        return {
+            tables: []
+        };
+    }
+}