-- ============================================================================
-- Add QR String Support to Orders
-- ============================================================================
-- Stores QRIS string and expiry for in-app QR code display
-- Eliminates need to redirect to external payment page
-- ============================================================================

-- Add columns for QRIS payment data
ALTER TABLE orders
ADD COLUMN IF NOT EXISTS qr_string TEXT,
ADD COLUMN IF NOT EXISTS qr_expires_at TIMESTAMPTZ;

-- Add index for cleanup of expired QR codes
CREATE INDEX IF NOT EXISTS idx_orders_qr_expires_at ON orders(qr_expires_at)
WHERE qr_expires_at IS NOT NULL;

-- Add comment
COMMENT ON COLUMN orders.qr_string IS 'QRIS payment string for generating QR code in-app. Cleared after payment or expiration.';
COMMENT ON COLUMN orders.qr_expires_at IS 'QRIS code expiration timestamp. Used for cleanup and validation.';