feat(ADM-018): completed feature

project/migrations/012_pricing.js

@@ -0,0 +1,52 @@
+/**
+ * Pricing variant prices and append-only price history.
+ */
+
+/** @param {import('node-pg-migrate').MigrationBuilder} pgm */
+export const up = (pgm) => {
+  pgm.sql(`
+    CREATE TABLE pricing_variant_prices (
+      variant_id uuid PRIMARY KEY,
+      net_unit_amount_cents integer NOT NULL,
+      vat_rate text NOT NULL,
+      currency text NOT NULL DEFAULT 'EUR',
+      created_at timestamptz NOT NULL DEFAULT now(),
+      updated_at timestamptz NOT NULL DEFAULT now(),
+      CONSTRAINT pricing_variant_prices_amount_non_negative CHECK (net_unit_amount_cents >= 0),
+      CONSTRAINT pricing_variant_prices_vat_rate_check CHECK (vat_rate IN ('general', 'reduced')),
+      CONSTRAINT pricing_variant_prices_currency_check CHECK (currency = 'EUR')
+    )
+  `);
+
+  pgm.sql(`
+    CREATE TABLE pricing_price_history (
+      id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+      variant_id uuid NOT NULL,
+      previous_net_unit_amount_cents integer,
+      previous_vat_rate text,
+      previous_currency text,
+      new_net_unit_amount_cents integer NOT NULL,
+      new_vat_rate text NOT NULL,
+      new_currency text NOT NULL DEFAULT 'EUR',
+      created_at timestamptz NOT NULL DEFAULT now(),
+      CONSTRAINT pricing_price_history_previous_amount_non_negative
+        CHECK (previous_net_unit_amount_cents IS NULL OR previous_net_unit_amount_cents >= 0),
+      CONSTRAINT pricing_price_history_new_amount_non_negative CHECK (new_net_unit_amount_cents >= 0),
+      CONSTRAINT pricing_price_history_previous_vat_rate_check
+        CHECK (previous_vat_rate IS NULL OR previous_vat_rate IN ('general', 'reduced')),
+      CONSTRAINT pricing_price_history_new_vat_rate_check CHECK (new_vat_rate IN ('general', 'reduced')),
+      CONSTRAINT pricing_price_history_previous_currency_check
+        CHECK (previous_currency IS NULL OR previous_currency = 'EUR'),
+      CONSTRAINT pricing_price_history_new_currency_check CHECK (new_currency = 'EUR')
+    )
+  `);
+  pgm.sql(
+    'CREATE INDEX pricing_price_history_variant_id_idx ON pricing_price_history (variant_id)',
+  );
+};
+
+/** @param {import('node-pg-migrate').MigrationBuilder} pgm */
+export const down = (pgm) => {
+  pgm.sql('DROP TABLE IF EXISTS pricing_price_history');
+  pgm.sql('DROP TABLE IF EXISTS pricing_variant_prices');
+};