Initial phase 1 baseline implementation

internal/adapters/postgres/store.go

@@ -0,0 +1,46 @@
+package postgres
+
+import (
+	"context"
+	"fmt"
+
+	dbgen "drive.local/drivev2/internal/adapters/postgres/generated"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+// Store owns the PostgreSQL connection pool and generated repositories.
+type Store struct {
+	pool    *pgxpool.Pool
+	queries *dbgen.Queries
+}
+
+func Open(ctx context.Context, databaseURL string) (*Store, error) {
+	poolConfig, err := pgxpool.ParseConfig(databaseURL)
+	if err != nil {
+		return nil, fmt.Errorf("parse database configuration: %w", err)
+	}
+
+	pool, err := pgxpool.NewWithConfig(ctx, poolConfig)
+	if err != nil {
+		return nil, fmt.Errorf("create database pool: %w", err)
+	}
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("ping database: %w", err)
+	}
+
+	return &Store{pool: pool, queries: dbgen.New(pool)}, nil
+}
+
+func (s *Store) Close() {
+	s.pool.Close()
+}
+
+func (s *Store) DatabaseHealth(ctx context.Context) error {
+	_, err := s.queries.DatabaseHealth(ctx)
+	return err
+}
+
+func (s *Store) OwnerExists(ctx context.Context) (bool, error) {
+	return s.queries.OwnerExists(ctx)
+}