Added GetAllUsersProject and corresponding test

backend/internal/database/db.go

@@ -23,6 +23,7 @@ type Database interface {
 	AddTimeReport(projectName string, userName string, start time.Time, end time.Time) error
 	AddUserToProject(username string, projectname string, role string) error
 	ChangeUserRole(username string, projectname string, role string) error
+	GetAllUsersProject(projectname string) ([]UserProjectMember, error)
 }
 
 // This struct is a wrapper type that holds the database connection
@@ -31,6 +32,11 @@ type Db struct {
 	*sqlx.DB
 }
 
+type UserProjectMember struct {
+	Username string `db:"username"`
+	UserRole string `db:"p_role"`
+}
+
 //go:embed migrations
 var scripts embed.FS
 
@@ -136,6 +142,39 @@ func (d *Db) AddProject(name string, description string, username string) error
 	return err
 }
 
+func (d *Db) GetAllUsersProject(projectname string) ([]UserProjectMember, error) {
+	// Define the SQL query to fetch users and their roles for a given project
+	query := `
+        SELECT u.username, ur.p_role
+        FROM users u
+        INNER JOIN user_roles ur ON u.id = ur.user_id
+        INNER JOIN projects p ON ur.project_id = p.id
+        WHERE p.name = ?
+    `
+
+	// Execute the query
+	rows, err := d.Queryx(query, projectname)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	// Iterate over the rows and populate the result slice
+	var users []UserProjectMember
+	for rows.Next() {
+		var user UserProjectMember
+		if err := rows.StructScan(&user); err != nil {
+			return nil, err
+		}
+		users = append(users, user)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return users, nil
+}
+
 // Reads a directory of migration files and applies them to the database.
 // This will eventually be used on an embedded directory
 func (d *Db) Migrate(dirname string) error {

backend/internal/database/db_test.go

@@ -174,3 +174,69 @@ func TestChangeUserRole(t *testing.T) {
 		t.Error("ChangeUserRole failed:", err)
 	}
 }
+
+func TestGetAllUsersProject(t *testing.T) {
+	db, err := setupState()
+	if err != nil {
+		t.Error("setupState failed:", err)
+	}
+
+	err = db.AddUser("testuser1", "password")
+	if err != nil {
+		t.Error("AddUser failed:", err)
+	}
+
+	err = db.AddUser("testuser2", "password")
+	if err != nil {
+		t.Error("AddUser failed:", err)
+	}
+
+	err = db.AddProject("testproject", "description", "testuser1")
+	if err != nil {
+		t.Error("AddProject failed:", err)
+	}
+
+	err = db.AddUserToProject("testuser1", "testproject", "project_manager")
+	if err != nil {
+		t.Error("AddUserToProject failed:", err)
+	}
+
+	err = db.AddUserToProject("testuser2", "testproject", "user")
+	if err != nil {
+		t.Error("AddUserToProject failed:", err)
+	}
+
+	users, err := db.GetAllUsersProject("testproject")
+	if err != nil {
+		t.Error("GetAllUsersProject failed:", err)
+	}
+
+	// Check if both users are returned with their roles
+	if len(users) != 2 {
+		t.Errorf("Expected 2 users, got %d", len(users))
+	}
+
+	// Check if testuser1 has project manager role
+	foundProjectManager := false
+	for _, user := range users {
+		if user.Username == "testuser1" && user.UserRole == "project_manager" {
+			foundProjectManager = true
+			break
+		}
+	}
+	if !foundProjectManager {
+		t.Error("Project Manager user not found")
+	}
+
+	// Check if testuser2 has user role
+	foundUser := false
+	for _, user := range users {
+		if user.Username == "testuser2" && user.UserRole == "user" {
+			foundUser = true
+			break
+		}
+	}
+	if !foundUser {
+		t.Error("User user not found")
+	}
+}