Initial backend import

internal/seed/seed.go

@@ -0,0 +1,29 @@
+package seed
+
+import (
+	"context"
+	"log"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func EnsureAdmin(ctx context.Context, pool *pgxpool.Pool, email, password string) error {
+	var n int
+	if err := pool.QueryRow(ctx, `SELECT COUNT(*) FROM admins`).Scan(&n); err != nil {
+		return err
+	}
+	if n > 0 {
+		return nil
+	}
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return err
+	}
+	_, err = pool.Exec(ctx, `INSERT INTO admins (email, password_hash) VALUES ($1, $2)`, email, string(hash))
+	if err != nil {
+		return err
+	}
+	log.Printf("seeded admin user %s", email)
+	return nil
+}