feat: add versioned migrations and kysely query layer

backend/migrations/1700000001000_create-users.cjs

@@ -0,0 +1,16 @@
+exports.up = (pgm) => {
+  pgm.createExtension('pgcrypto', { ifNotExists: true });
+  pgm.createTable('users', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    external_subject_id: { type: 'text', notNull: true },
+    display_name: { type: 'text', notNull: true },
+    email: { type: 'text', notNull: true },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint('users', 'users_external_subject_id_key', 'UNIQUE(external_subject_id)');
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('users');
+};

backend/migrations/1700000002000_create-user-preferences.cjs

@@ -0,0 +1,24 @@
+exports.up = (pgm) => {
+  pgm.createTable('user_preferences', {
+    user_id: {
+      type: 'uuid',
+      primaryKey: true,
+      notNull: true,
+      references: 'users(id)',
+      onDelete: 'CASCADE',
+    },
+    preferred_pace: { type: 'text' },
+    preferred_budget_level: { type: 'text' },
+    max_walking_distance_km: { type: 'numeric' },
+    preferred_start_time: { type: 'text' },
+    child_friendly_preferred: { type: 'boolean', notNull: true, default: false },
+    interests: { type: 'text[]', notNull: true, default: '{}' },
+    notes: { type: 'text' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('user_preferences');
+};

backend/migrations/1700000003000_create-trips.cjs

@@ -0,0 +1,26 @@
+exports.up = (pgm) => {
+  pgm.createTable('trips', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    name: { type: 'text', notNull: true },
+    description: { type: 'text' },
+    owner_id: { type: 'uuid', notNull: true, references: 'users(id)' },
+    start_date: { type: 'date' },
+    end_date: { type: 'date' },
+    status: { type: 'text', notNull: true, default: 'DRAFT' },
+    planning_stage: { type: 'text' },
+    currency: { type: 'text', notNull: true, default: 'EUR' },
+    version: { type: 'integer', notNull: true, default: 1 },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint(
+    'trips',
+    'trips_status_check',
+    "CHECK (status IN ('DRAFT','PLANNING','BOOKING','UPCOMING','ACTIVE','COMPLETED','ARCHIVED'))",
+  );
+  pgm.createIndex('trips', 'owner_id');
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('trips');
+};

backend/migrations/1700000004000_create-trip-settings.cjs

@@ -0,0 +1,23 @@
+exports.up = (pgm) => {
+  pgm.createTable('trip_settings', {
+    trip_id: {
+      type: 'uuid',
+      primaryKey: true,
+      notNull: true,
+      references: 'trips(id)',
+      onDelete: 'CASCADE',
+    },
+    web_research_enabled: { type: 'boolean', notNull: true, default: false },
+    periodic_agent_review_enabled: { type: 'boolean', notNull: true, default: false },
+    notification_email_enabled: { type: 'boolean', notNull: true, default: true },
+    notification_push_enabled: { type: 'boolean', notNull: true, default: true },
+    default_research_depth: { type: 'text' },
+    default_planning_style: { type: 'text' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('trip_settings');
+};

backend/migrations/1700000005000_create-trip-members.cjs

@@ -0,0 +1,25 @@
+exports.up = (pgm) => {
+  pgm.createTable('trip_members', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    trip_id: { type: 'uuid', notNull: true, references: 'trips(id)', onDelete: 'CASCADE' },
+    user_id: { type: 'uuid', notNull: true, references: 'users(id)' },
+    role: { type: 'text', notNull: true },
+    status: { type: 'text', notNull: true },
+    joined_at: { type: 'timestamptz' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint('trip_members', 'trip_members_trip_user_key', 'UNIQUE(trip_id, user_id)');
+  pgm.addConstraint('trip_members', 'trip_members_role_check', "CHECK (role IN ('OWNER','MEMBER'))");
+  pgm.addConstraint(
+    'trip_members',
+    'trip_members_status_check',
+    "CHECK (status IN ('INVITED','ACTIVE','DECLINED'))",
+  );
+  pgm.createIndex('trip_members', 'trip_id');
+  pgm.createIndex('trip_members', 'user_id');
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('trip_members');
+};

backend/migrations/1700000006000_create-trip-invitations.cjs

@@ -0,0 +1,20 @@
+exports.up = (pgm) => {
+  pgm.createTable('trip_invitations', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    trip_id: { type: 'uuid', notNull: true, references: 'trips(id)', onDelete: 'CASCADE' },
+    email: { type: 'text', notNull: true },
+    invited_by_user_id: { type: 'uuid', notNull: true, references: 'users(id)' },
+    token_hash: { type: 'text', notNull: true },
+    expires_at: { type: 'timestamptz', notNull: true },
+    accepted_at: { type: 'timestamptz' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint('trip_invitations', 'trip_invitations_token_hash_key', 'UNIQUE(token_hash)');
+  pgm.createIndex('trip_invitations', 'trip_id');
+  pgm.sql('CREATE INDEX trip_invitations_lower_email_idx ON trip_invitations (lower(email))');
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('trip_invitations');
+};

backend/migrations/1700000007000_create-travelers.cjs

@@ -0,0 +1,22 @@
+exports.up = (pgm) => {
+  pgm.createTable('travelers', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    trip_id: { type: 'uuid', notNull: true, references: 'trips(id)', onDelete: 'CASCADE' },
+    linked_user_id: { type: 'uuid', references: 'users(id)' },
+    display_name: { type: 'text', notNull: true },
+    traveler_type: { type: 'text', notNull: true },
+    created_by_user_id: { type: 'uuid', notNull: true, references: 'users(id)' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint(
+    'travelers',
+    'travelers_traveler_type_check',
+    "CHECK (traveler_type IN ('ADULT','CHILD','INFANT'))",
+  );
+  pgm.createIndex('travelers', 'trip_id');
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('travelers');
+};

backend/migrations/1700000008000_create-trip-preference-overrides.cjs

@@ -0,0 +1,30 @@
+exports.up = (pgm) => {
+  pgm.createTable('trip_preference_overrides', {
+    id: { type: 'uuid', primaryKey: true, default: pgm.func('gen_random_uuid()') },
+    trip_id: { type: 'uuid', notNull: true, references: 'trips(id)', onDelete: 'CASCADE' },
+    user_id: { type: 'uuid', references: 'users(id)' },
+    traveler_id: { type: 'uuid', references: 'travelers(id)', onDelete: 'CASCADE' },
+    overrides: { type: 'jsonb', notNull: true, default: '{}' },
+    created_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+    updated_at: { type: 'timestamptz', notNull: true, default: pgm.func('now()') },
+  });
+  pgm.addConstraint(
+    'trip_preference_overrides',
+    'trip_preference_overrides_subject_check',
+    'CHECK (num_nonnulls(user_id, traveler_id) = 1)',
+  );
+  pgm.createIndex('trip_preference_overrides', ['trip_id', 'user_id'], {
+    unique: true,
+    where: 'user_id IS NOT NULL',
+    name: 'trip_pref_overrides_trip_user_uq',
+  });
+  pgm.createIndex('trip_preference_overrides', ['trip_id', 'traveler_id'], {
+    unique: true,
+    where: 'traveler_id IS NOT NULL',
+    name: 'trip_pref_overrides_trip_traveler_uq',
+  });
+};
+
+exports.down = (pgm) => {
+  pgm.dropTable('trip_preference_overrides');
+};