feat: añadir migrador de migraciones up-only para SQLite

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

src/db/migrations/index.ts

@@ -0,0 +1,119 @@
+import type { Database } from 'bun:sqlite';
+
+export type Migration = {
+  version: number;
+  name: string;
+  checksum: string; // estático para trazabilidad básica
+  up: (db: Database) => void | Promise<void>;
+};
+
+function tableHasColumn(db: Database, table: string, column: string): boolean {
+  const cols = db.query(`PRAGMA table_info(${table})`).all() as any[];
+  return Array.isArray(cols) && cols.some((c: any) => c.name === column);
+}
+
+export const migrations: Migration[] = [
+  {
+    version: 1,
+    name: 'initial-schema',
+    checksum: 'v1-initial-schema-2025-09-06',
+    up: (db: Database) => {
+      // Esquema inicial (equivalente al initializeDatabase actual)
+      db.exec(`PRAGMA foreign_keys = ON;`);
+
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS users (
+          id TEXT PRIMARY KEY,
+          first_seen TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+          last_seen TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now'))
+        );
+      `);
+
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS groups (
+          id TEXT PRIMARY KEY,
+          community_id TEXT NOT NULL,
+          name TEXT,
+          last_verified TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+          active BOOLEAN DEFAULT TRUE
+        );
+      `);
+
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS tasks (
+          id INTEGER PRIMARY KEY AUTOINCREMENT,
+          description TEXT NOT NULL,
+          created_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+          due_date TEXT NULL,
+          completed BOOLEAN DEFAULT FALSE,
+          completed_at TEXT NULL,
+          group_id TEXT NULL,
+          created_by TEXT NOT NULL,
+          completed_by TEXT NULL,
+          FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE CASCADE,
+          FOREIGN KEY (completed_by) REFERENCES users(id) ON DELETE SET NULL,
+          FOREIGN KEY (group_id) REFERENCES groups(id) ON DELETE SET NULL
+        );
+      `);
+
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS task_assignments (
+          task_id INTEGER NOT NULL,
+          user_id TEXT NOT NULL,
+          assigned_by TEXT NOT NULL,
+          assigned_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+          PRIMARY KEY (task_id, user_id),
+          FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE,
+          FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
+          FOREIGN KEY (assigned_by) REFERENCES users(id) ON DELETE CASCADE
+        );
+      `);
+
+      db.exec(`
+        CREATE TABLE IF NOT EXISTS response_queue (
+          id INTEGER PRIMARY KEY AUTOINCREMENT,
+          recipient TEXT NOT NULL,
+          message TEXT NOT NULL,
+          status TEXT NOT NULL DEFAULT 'queued' CHECK (status IN ('queued','processing','sent','failed')),
+          attempts INTEGER NOT NULL DEFAULT 0,
+          last_error TEXT NULL,
+          metadata TEXT NULL,
+          created_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now')),
+          updated_at TEXT DEFAULT (strftime('%Y-%m-%d %H:%M:%f', 'now'))
+        );
+      `);
+
+      db.exec(`
+        CREATE INDEX IF NOT EXISTS idx_response_queue_status_created_at
+        ON response_queue (status, created_at);
+      `);
+    }
+  },
+  {
+    version: 2,
+    name: 'response-queue-reliability',
+    checksum: 'v2-rq-reliability-2025-09-06',
+    up: (db: Database) => {
+      // Añadir columnas necesarias si no existen (idempotente)
+      if (!tableHasColumn(db, 'response_queue', 'next_attempt_at')) {
+        db.exec(`ALTER TABLE response_queue ADD COLUMN next_attempt_at TEXT NULL;`);
+      }
+      if (!tableHasColumn(db, 'response_queue', 'lease_until')) {
+        db.exec(`ALTER TABLE response_queue ADD COLUMN lease_until TEXT NULL;`);
+      }
+      if (!tableHasColumn(db, 'response_queue', 'last_status_code')) {
+        db.exec(`ALTER TABLE response_queue ADD COLUMN last_status_code INTEGER NULL;`);
+      }
+
+      // Índices complementarios
+      db.exec(`
+        CREATE INDEX IF NOT EXISTS idx_response_queue_status_next_attempt
+        ON response_queue (status, next_attempt_at);
+      `);
+      db.exec(`
+        CREATE INDEX IF NOT EXISTS idx_response_queue_status_lease_until
+        ON response_queue (status, lease_until);
+      `);
+    }
+  }
+];

src/db/migrator.ts

@@ -0,0 +1,116 @@
+import type { Database } from 'bun:sqlite';
+import { mkdirSync } from 'fs';
+import { join } from 'path';
+import { migrations, type Migration } from './migrations';
+
+function nowIso(): string {
+  return new Date().toISOString().replace('T', ' ').replace('Z', '');
+}
+
+function ensureMigrationsTable(db: Database) {
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS schema_migrations (
+      version INTEGER PRIMARY KEY,
+      name TEXT NOT NULL,
+      checksum TEXT NOT NULL,
+      applied_at TEXT NOT NULL
+    );
+  `);
+}
+
+function getAppliedVersions(db: Database): Map<number, { name: string; checksum: string; applied_at: string }> {
+  const rows = db.query(`SELECT version, name, checksum, applied_at FROM schema_migrations ORDER BY version`).all() as any[];
+  const map = new Map<number, { name: string; checksum: string; applied_at: string }>();
+  for (const r of rows) {
+    map.set(Number(r.version), { name: String(r.name), checksum: String(r.checksum), applied_at: String(r.applied_at) });
+  }
+  return map;
+}
+
+function tableExists(db: Database, table: string): boolean {
+  const row = db.query(`SELECT name FROM sqlite_master WHERE type='table' AND name=?`).get(table) as any;
+  return !!row;
+}
+
+function detectExistingSchema(db: Database): boolean {
+  // Consideramos esquema "existente" si ya hay tablas clave
+  const coreTables = ['users', 'tasks', 'response_queue'];
+  return coreTables.every(t => tableExists(db, t));
+}
+
+function insertMigrationRow(db: Database, mig: Migration) {
+  db.prepare(
+    `INSERT INTO schema_migrations (version, name, checksum, applied_at) VALUES (?, ?, ?, ?)`
+  ).run(mig.version, mig.name, mig.checksum, nowIso());
+}
+
+async function backupDatabaseIfNeeded(db: Database): Promise<string | null> {
+  if (process.env.NODE_ENV === 'test') return null;
+  try {
+    mkdirSync('data', { recursive: true });
+  } catch {}
+  const stamp = new Date().toISOString().replace(/[-:T.Z]/g, '').slice(0, 14);
+  const backupPath = join('data', `tasks.db.bak-${stamp}.sqlite`);
+  try {
+    // VACUUM INTO hace copia consistente del estado actual
+    db.exec(`VACUUM INTO '${backupPath.replace(/'/g, "''")}'`);
+    console.log(`ℹ️ Backup de base de datos creado en: ${backupPath}`);
+    return backupPath;
+  } catch (e) {
+    console.warn('⚠️ No se pudo crear el backup con VACUUM INTO (continuando de todos modos):', e);
+    return null;
+  }
+}
+
+export const Migrator = {
+  ensureMigrationsTable,
+  getAppliedVersions,
+
+  async migrateToLatest(db: Database, options?: { withBackup?: boolean; allowBaseline?: boolean }) {
+    const withBackup = options?.withBackup !== false;
+    const allowBaseline = options?.allowBaseline !== false;
+
+    ensureMigrationsTable(db);
+    const applied = getAppliedVersions(db);
+    const pending = migrations.filter(m => !applied.has(m.version)).sort((a, b) => a.version - b.version);
+
+    if (applied.size === 0 && allowBaseline && detectExistingSchema(db)) {
+      // Baseline a v1 si ya existe el esquema pero no hay registro
+      const v1 = migrations.find(m => m.version === 1)!;
+      db.transaction(() => {
+        insertMigrationRow(db, v1);
+      })();
+      console.log('ℹ️ Baseline aplicado: schema_migrations marcada en v1 (sin ejecutar up)');
+      // Recalcular pendientes
+      pending.splice(0, pending.length, ...migrations.filter(m => m.version > 1));
+    }
+
+    if (pending.length === 0) {
+      console.log('ℹ️ No hay migraciones pendientes');
+      return;
+    }
+
+    if (withBackup) {
+      await backupDatabaseIfNeeded(db);
+    }
+
+    for (const mig of pending) {
+      console.log(`➡️ Aplicando migración v${mig.version} - ${mig.name}`);
+      try {
+        db.transaction(() => {
+          // Ejecutar up
+          const res = mig.up(db);
+          if (res instanceof Promise) {
+            throw new Error('Las migraciones up no deben ser asíncronas en este migrador');
+          }
+          // Registrar
+          insertMigrationRow(db, mig);
+        })();
+        console.log(`✅ Migración v${mig.version} aplicada`);
+      } catch (e) {
+        console.error(`❌ Error aplicando migración v${mig.version}:`, e);
+        throw e;
+      }
+    }
+  }
+};

src/server.ts

@@ -6,8 +6,9 @@ import { ResponseQueue } from './services/response-queue';
 import { TaskService } from './tasks/service';
 import { WebhookManager } from './services/webhook-manager';
 import { normalizeWhatsAppId, isGroupId } from './utils/whatsapp';
-import { ensureUserExists, db, initializeDatabase } from './db';
+import { ensureUserExists, db } from './db';
 import { ContactsService } from './services/contacts';
+import { Migrator } from './db/migrator';
 
 // Bun is available globally when running under Bun runtime
 declare global {
@@ -265,8 +266,8 @@ export class WebhookServer {
 	static async start() {
 		this.validateEnv();
 
-		// Ensure database schema and migrations are applied
+		// Run database migrations (up-only) before starting services
-		initializeDatabase(this.dbInstance);
+		await Migrator.migrateToLatest(this.dbInstance);
 
 		const PORT = process.env.PORT || '3007';
 		console.log('✅ Environment variables validated');