Add database migrations runner

backend/internal/repository/postgres/migrations.go

@@ -0,0 +1,152 @@
+package postgres
+
+import (
+	"context"
+	"embed"
+	"fmt"
+	"sort"
+	"time"
+)
+
+//go:embed migrations/*.sql
+var migrationFiles embed.FS
+
+type migration struct {
+	version int
+	name    string
+	sql     string
+}
+
+// ApplyMigrations ensures the database schema is up to date.
+func (r *Repository) ApplyMigrations(ctx context.Context) error {
+	migrations, err := loadMigrations()
+	if err != nil {
+		return err
+	}
+
+	if err := r.ensureMigrationsTable(ctx); err != nil {
+		return err
+	}
+
+	applied, err := r.fetchAppliedVersions(ctx)
+	if err != nil {
+		return err
+	}
+
+	for _, m := range migrations {
+		if applied[m.version] {
+			continue
+		}
+
+		if err := r.applyMigration(ctx, m); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func loadMigrations() ([]migration, error) {
+	entries, err := migrationFiles.ReadDir("migrations")
+	if err != nil {
+		return nil, fmt.Errorf("read migrations dir: %w", err)
+	}
+
+	migrations := make([]migration, 0, len(entries))
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+
+		name := entry.Name()
+		version, err := parseMigrationVersion(name)
+		if err != nil {
+			return nil, err
+		}
+
+		content, err := migrationFiles.ReadFile("migrations/" + name)
+		if err != nil {
+			return nil, fmt.Errorf("read migration %s: %w", name, err)
+		}
+
+		migrations = append(migrations, migration{
+			version: version,
+			name:    name,
+			sql:     string(content),
+		})
+	}
+
+	sort.Slice(migrations, func(i, j int) bool {
+		return migrations[i].version < migrations[j].version
+	})
+
+	return migrations, nil
+}
+
+func parseMigrationVersion(name string) (int, error) {
+	var version int
+	if _, err := fmt.Sscanf(name, "%d_", &version); err == nil {
+		return version, nil
+	}
+	if _, err := fmt.Sscanf(name, "%d-", &version); err == nil {
+		return version, nil
+	}
+	return 0, fmt.Errorf("invalid migration filename: %s", name)
+}
+
+func (r *Repository) ensureMigrationsTable(ctx context.Context) error {
+	const schema = `
+CREATE TABLE IF NOT EXISTS schema_migrations (
+    version INT PRIMARY KEY,
+    name TEXT NOT NULL,
+    applied_at TIMESTAMPTZ NOT NULL
+);`
+	if _, err := r.db.ExecContext(ctx, schema); err != nil {
+		return fmt.Errorf("create migrations table: %w", err)
+	}
+	return nil
+}
+
+func (r *Repository) fetchAppliedVersions(ctx context.Context) (map[int]bool, error) {
+	rows, err := r.db.QueryxContext(ctx, `SELECT version FROM schema_migrations`)
+	if err != nil {
+		return nil, fmt.Errorf("fetch applied migrations: %w", err)
+	}
+	defer rows.Close()
+
+	applied := make(map[int]bool)
+	for rows.Next() {
+		var version int
+		if err := rows.Scan(&version); err != nil {
+			return nil, fmt.Errorf("scan applied migration: %w", err)
+		}
+		applied[version] = true
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("read applied migrations: %w", err)
+	}
+	return applied, nil
+}
+
+func (r *Repository) applyMigration(ctx context.Context, m migration) error {
+	tx, err := r.db.BeginTxx(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("begin migration %d: %w", m.version, err)
+	}
+
+	if _, err := tx.ExecContext(ctx, m.sql); err != nil {
+		_ = tx.Rollback()
+		return fmt.Errorf("apply migration %d: %w", m.version, err)
+	}
+
+	if _, err := tx.ExecContext(ctx, `INSERT INTO schema_migrations (version, name, applied_at) VALUES ($1, $2, $3)`, m.version, m.name, time.Now().UTC()); err != nil {
+		_ = tx.Rollback()
+		return fmt.Errorf("record migration %d: %w", m.version, err)
+	}
+
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("commit migration %d: %w", m.version, err)
+	}
+
+	return nil
+}

backend/internal/repository/postgres/migrations/0001_init.sql

@@ -0,0 +1,111 @@
+CREATE TABLE IF NOT EXISTS companies (
+    id UUID PRIMARY KEY,
+    cnpj TEXT NOT NULL UNIQUE,
+    corporate_name TEXT NOT NULL,
+    category TEXT NOT NULL DEFAULT 'farmacia',
+    license_number TEXT NOT NULL,
+    is_verified BOOLEAN NOT NULL DEFAULT FALSE,
+    latitude DOUBLE PRECISION NOT NULL DEFAULT 0,
+    longitude DOUBLE PRECISION NOT NULL DEFAULT 0,
+    city TEXT NOT NULL DEFAULT '',
+    state TEXT NOT NULL DEFAULT '',
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS users (
+    id UUID PRIMARY KEY,
+    company_id UUID NOT NULL REFERENCES companies(id),
+    role TEXT NOT NULL,
+    name TEXT NOT NULL,
+    email TEXT NOT NULL UNIQUE,
+    password_hash TEXT NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS products (
+    id UUID PRIMARY KEY,
+    seller_id UUID NOT NULL REFERENCES companies(id),
+    name TEXT NOT NULL,
+    description TEXT,
+    batch TEXT NOT NULL,
+    expires_at DATE NOT NULL,
+    price_cents BIGINT NOT NULL,
+    stock BIGINT NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS inventory_adjustments (
+    id UUID PRIMARY KEY,
+    product_id UUID NOT NULL REFERENCES products(id),
+    delta BIGINT NOT NULL,
+    reason TEXT,
+    created_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS orders (
+    id UUID PRIMARY KEY,
+    buyer_id UUID NOT NULL REFERENCES companies(id),
+    seller_id UUID NOT NULL REFERENCES companies(id),
+    status TEXT NOT NULL,
+    total_cents BIGINT NOT NULL,
+    shipping_recipient_name TEXT,
+    shipping_street TEXT,
+    shipping_number TEXT,
+    shipping_complement TEXT,
+    shipping_district TEXT,
+    shipping_city TEXT,
+    shipping_state TEXT,
+    shipping_zip_code TEXT,
+    shipping_country TEXT,
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS order_items (
+    id UUID PRIMARY KEY,
+    order_id UUID NOT NULL REFERENCES orders(id),
+    product_id UUID NOT NULL REFERENCES products(id),
+    quantity BIGINT NOT NULL,
+    unit_cents BIGINT NOT NULL,
+    batch TEXT NOT NULL,
+    expires_at DATE NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS cart_items (
+    id UUID PRIMARY KEY,
+    buyer_id UUID NOT NULL REFERENCES companies(id),
+    product_id UUID NOT NULL REFERENCES products(id),
+    quantity BIGINT NOT NULL,
+    unit_cents BIGINT NOT NULL,
+    batch TEXT,
+    expires_at DATE,
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL,
+    UNIQUE (buyer_id, product_id)
+);
+
+CREATE TABLE IF NOT EXISTS reviews (
+    id UUID PRIMARY KEY,
+    order_id UUID NOT NULL UNIQUE REFERENCES orders(id),
+    buyer_id UUID NOT NULL REFERENCES companies(id),
+    seller_id UUID NOT NULL REFERENCES companies(id),
+    rating INT NOT NULL CHECK (rating BETWEEN 1 AND 5),
+    comment TEXT,
+    created_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_reviews_seller_id ON reviews (seller_id);
+
+CREATE TABLE IF NOT EXISTS shipments (
+    id UUID PRIMARY KEY,
+    order_id UUID NOT NULL UNIQUE REFERENCES orders(id),
+    carrier TEXT NOT NULL,
+    tracking_code TEXT,
+    external_tracking TEXT,
+    status TEXT NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL
+);

backend/internal/repository/postgres/postgres.go

@@ -952,126 +952,3 @@ func (r *Repository) AdminDashboard(ctx context.Context, since time.Time) (*doma
 
 	return &domain.AdminDashboard{GMVCents: totalGMV, NewCompanies: newCompanies, WindowStartAt: since}, nil
 }
-
-// InitSchema applies a minimal schema for development environments.
-func (r *Repository) InitSchema(ctx context.Context) error {
-	schema := `
-CREATE TABLE IF NOT EXISTS companies (
-    id UUID PRIMARY KEY,
-    cnpj TEXT NOT NULL UNIQUE,
-    corporate_name TEXT NOT NULL,
-    category TEXT NOT NULL DEFAULT 'farmacia',
-    license_number TEXT NOT NULL,
-    is_verified BOOLEAN NOT NULL DEFAULT FALSE,
-    latitude DOUBLE PRECISION NOT NULL DEFAULT 0,
-    longitude DOUBLE PRECISION NOT NULL DEFAULT 0,
-    city TEXT NOT NULL DEFAULT '',
-    state TEXT NOT NULL DEFAULT '',
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-
-CREATE TABLE IF NOT EXISTS users (
-    id UUID PRIMARY KEY,
-    company_id UUID NOT NULL REFERENCES companies(id),
-    role TEXT NOT NULL,
-    name TEXT NOT NULL,
-    email TEXT NOT NULL UNIQUE,
-    password_hash TEXT NOT NULL,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS products (
-    id UUID PRIMARY KEY,
-    seller_id UUID NOT NULL REFERENCES companies(id),
-    name TEXT NOT NULL,
-    description TEXT,
-    batch TEXT NOT NULL,
-    expires_at DATE NOT NULL,
-    price_cents BIGINT NOT NULL,
-    stock BIGINT NOT NULL,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS inventory_adjustments (
-    id UUID PRIMARY KEY,
-    product_id UUID NOT NULL REFERENCES products(id),
-    delta BIGINT NOT NULL,
-    reason TEXT,
-    created_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS orders (
-    id UUID PRIMARY KEY,
-    buyer_id UUID NOT NULL REFERENCES companies(id),
-    seller_id UUID NOT NULL REFERENCES companies(id),
-    status TEXT NOT NULL,
-    total_cents BIGINT NOT NULL,
-    shipping_recipient_name TEXT,
-    shipping_street TEXT,
-    shipping_number TEXT,
-    shipping_complement TEXT,
-    shipping_district TEXT,
-    shipping_city TEXT,
-    shipping_state TEXT,
-    shipping_zip_code TEXT,
-    shipping_country TEXT,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS order_items (
-    id UUID PRIMARY KEY,
-    order_id UUID NOT NULL REFERENCES orders(id),
-    product_id UUID NOT NULL REFERENCES products(id),
-    quantity BIGINT NOT NULL,
-    unit_cents BIGINT NOT NULL,
-    batch TEXT NOT NULL,
-    expires_at DATE NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS cart_items (
-    id UUID PRIMARY KEY,
-    buyer_id UUID NOT NULL REFERENCES companies(id),
-    product_id UUID NOT NULL REFERENCES products(id),
-    quantity BIGINT NOT NULL,
-    unit_cents BIGINT NOT NULL,
-    batch TEXT,
-    expires_at DATE,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL,
-    UNIQUE (buyer_id, product_id)
-);
-
-CREATE TABLE IF NOT EXISTS reviews (
-    id UUID PRIMARY KEY,
-    order_id UUID NOT NULL UNIQUE REFERENCES orders(id),
-    buyer_id UUID NOT NULL REFERENCES companies(id),
-    seller_id UUID NOT NULL REFERENCES companies(id),
-    rating INT NOT NULL CHECK (rating BETWEEN 1 AND 5),
-    comment TEXT,
-    created_at TIMESTAMPTZ NOT NULL
-);
-
-CREATE INDEX IF NOT EXISTS idx_reviews_seller_id ON reviews (seller_id);
-
-CREATE TABLE IF NOT EXISTS shipments (
-    id UUID PRIMARY KEY,
-    order_id UUID NOT NULL UNIQUE REFERENCES orders(id),
-    carrier TEXT NOT NULL,
-    tracking_code TEXT,
-    external_tracking TEXT,
-    status TEXT NOT NULL,
-    created_at TIMESTAMPTZ NOT NULL,
-    updated_at TIMESTAMPTZ NOT NULL
-);
-`
-
-	if _, err := r.db.ExecContext(ctx, schema); err != nil {
-		return fmt.Errorf("apply schema: %w", err)
-	}
-	return nil
-}

backend/internal/server/server.go

@@ -123,7 +123,7 @@ func (s *Server) Start(ctx context.Context) error {
 	}
 
 	repo := postgres.New(s.db)
-	if err := repo.InitSchema(ctx); err != nil {
+	if err := repo.ApplyMigrations(ctx); err != nil {
 		return err
 	}