Add user auth, cart, checkout and personal account for guests and registered users

migrations/004_users_cart_orders.sql

@@ -0,0 +1,52 @@
+-- Пользователи, корзина, заказы
+
+CREATE TABLE IF NOT EXISTS users (
+    id            SERIAL PRIMARY KEY,
+    email         VARCHAR(255) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    name          VARCHAR(255) NOT NULL DEFAULT '',
+    phone         VARCHAR(50) NOT NULL DEFAULT '',
+    address       TEXT NOT NULL DEFAULT '',
+    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS carts (
+    id          SERIAL PRIMARY KEY,
+    user_id     INT REFERENCES users(id) ON DELETE CASCADE,
+    session_key VARCHAR(64) NOT NULL DEFAULT '',
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_carts_user ON carts (user_id) WHERE user_id IS NOT NULL;
+CREATE UNIQUE INDEX IF NOT EXISTS idx_carts_session ON carts (session_key) WHERE user_id IS NULL;
+
+CREATE TABLE IF NOT EXISTS cart_items (
+    id         SERIAL PRIMARY KEY,
+    cart_id    INT NOT NULL REFERENCES carts(id) ON DELETE CASCADE,
+    product_id INT NOT NULL REFERENCES products(id) ON DELETE CASCADE,
+    quantity   INT NOT NULL DEFAULT 1 CHECK (quantity > 0),
+    UNIQUE (cart_id, product_id)
+);
+
+CREATE TABLE IF NOT EXISTS orders (
+    id          SERIAL PRIMARY KEY,
+    user_id     INT REFERENCES users(id) ON DELETE SET NULL,
+    guest_name  VARCHAR(255) NOT NULL DEFAULT '',
+    guest_email VARCHAR(255) NOT NULL DEFAULT '',
+    guest_phone VARCHAR(50) NOT NULL DEFAULT '',
+    address     TEXT NOT NULL DEFAULT '',
+    total       NUMERIC(10, 2) NOT NULL DEFAULT 0,
+    status      VARCHAR(50) NOT NULL DEFAULT 'new',
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS order_items (
+    id           SERIAL PRIMARY KEY,
+    order_id     INT NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
+    product_id   INT NOT NULL,
+    product_name VARCHAR(255) NOT NULL,
+    price        NUMERIC(10, 2) NOT NULL,
+    quantity     INT NOT NULL CHECK (quantity > 0)
+);
+
+CREATE INDEX IF NOT EXISTS idx_orders_user ON orders (user_id);