ChangeUserName function in db.go fixed, corresponding test added

backend/internal/database/db.go

@@ -66,10 +66,8 @@ const addWeeklyReport = `WITH UserLookup AS (SELECT id FROM users WHERE username
 						ProjectLookup AS (SELECT id FROM projects WHERE name = ?)
 						INSERT INTO weekly_reports (project_id, user_id, week, development_time, meeting_time, admin_time, own_work_time, study_time, testing_time)
 						VALUES ((SELECT id FROM ProjectLookup), (SELECT id FROM UserLookup),?, ?, ?, ?, ?, ?, ?);`
-const addUserToProject = "INSERT INTO user_roles (user_id, project_id, p_role) VALUES (?, ?, ?)" // WIP
+const addUserToProject = "INSERT INTO user_roles (user_id, project_id, p_role) VALUES (?, ?, ?)"
 const changeUserRole = "UPDATE user_roles SET p_role = ? WHERE user_id = ? AND project_id = ?"
-const changeUserName = "UPDATE user SET username = ? WHERE user_id = ?" // WIP
-
 const getProjectsForUser = `SELECT p.id, p.name, p.description FROM projects p	
 							JOIN user_roles ur ON p.id = ur.project_id
 							JOIN users u ON ur.user_id = u.id
@@ -133,7 +131,7 @@ func (d *Db) AddWeeklyReport(projectName string, userName string, week int, deve
 }
 
 // AddUserToProject adds a user to a project with a specified role.
-func (d *Db) AddUserToProject(username string, projectname string, role string) error { // WIP
+func (d *Db) AddUserToProject(username string, projectname string, role string) error {
 	var userid int
 	userid, err := d.GetUserId(username)
 	if err != nil {
@@ -171,18 +169,11 @@ func (d *Db) ChangeUserRole(username string, projectname string, role string) er
 	return err3
 }
 
-// ChangeUserRole changes the role of a user within a project.
+// ChangeUserName changes the username of a user.
 func (d *Db) ChangeUserName(username string, newname string) error {
-	// Get the user ID
-	var userid int
-	userid, err := d.GetUserId(username)
-	if err != nil {
-		panic(err)
-	}
-
-	// Execute the SQL query to change the user's role
-	_, err2 := d.Exec(changeUserName, username, userid)
-	return err2
+	// Execute the SQL query to update the username
+	_, err := d.Exec("UPDATE users SET username = ? WHERE username = ?", newname, username)
+	return err
 }
 
 // GetUserRole retrieves the role of a user within a project.

backend/internal/database/db_test.go

@@ -675,3 +675,39 @@ func TestIsProjectManager(t *testing.T) {
 		t.Error("Expected projectManager to be a project manager, but it's not.")
 	}
 }
+
+func TestChangeUserName(t *testing.T) {
+	db, err := setupState()
+	if err != nil {
+		t.Error("setupState failed:", err)
+	}
+
+	// Add a user
+	err = db.AddUser("testuser", "password")
+	if err != nil {
+		t.Error("AddUser failed:", err)
+	}
+
+	// Change the user's name
+	err = db.ChangeUserName("testuser", "newname")
+	if err != nil {
+		t.Error("ChangeUserName failed:", err)
+	}
+
+	// Retrieve the user's ID
+	userID, err := db.GetUserId("newname")
+	if err != nil {
+		t.Error("GetUserId failed:", err)
+	}
+
+	// Ensure the user's ID matches the expected value
+	if userID != 1 {
+		t.Errorf("Expected user ID to be 1, got %d", userID)
+	}
+
+	// Attempt to retrieve the user by the old name
+	_, err = db.GetUserId("testuser")
+	if err == nil {
+		t.Error("Expected GetUserId to fail for the old name, but it didn't")
+	}
+}

backend/internal/types/users.go

@@ -32,3 +32,8 @@ type PublicUser struct {
 type Token struct {
 	Token string `json:"token"`
 }
+
+type StrNameChange struct {
+	PrevName string `json:"prevName" db:"prevName"`
+	NewName  string `json:"newName" db:"newName"`
+}