database/gormdb.go: first user to sign up is automatically made admin.

database/database.go

@@ -13,7 +13,8 @@ type Database interface {
 	GetUserByRemoteIdentity(provider string, id uint64, accessToken string) (*models.User, error)
 	GetUsers(ids ...uint64) ([]*models.User, error)
 
-	// SetAdmin makes an existing user an administrator.
+	// SetAdmin makes an existing user an administrator. The admin role is allowed to
+	// create courses, so it makes sense that teachers are made admins.
 	SetAdmin(uint64) error
 
 	CreateCourse(*models.Course) error

database/gormdb.go

@@ -124,6 +124,12 @@ func (db *GormDB) CreateUserFromRemoteIdentity(provider string, remoteID uint64,
 	if err := db.conn.Create(&user).Error; err != nil {
 		return nil, err
 	}
+	// The first user defaults to admin user.
+	if user.ID == 1 {
+		if err := db.SetAdmin(1); err != nil {
+			return nil, err
+		}
+	}
 	return &user, nil
 }