getemployees.go

// GetEmployees returns a list of employees with a pre-signed URL to their profile picture
// to make the example easier to follow, I have a mock data with a list of employees,
// so we don't need to use a database
func (u FileManager) GetEmployees() ([]Employee, error) {
	for i, _ := range employees {
		preSignedURL, err := u.service.Presign(employees[i].Picture)
		if err != nil {
			return nil, fmt.Errorf("filemanager.GetEmployees(): %w", err)
		}

		employees[i].PreSignedPicture = preSignedURL
	}

	return employees, nil
}

// mock data for the example, this should be in a database

var employees = Employees{
	{
		Name:    "Hernan Reyes",
		Picture: "employees/149d6d2d-6adb-464a-ad97-1927cffce309.jpg",
	},
	{
		Name:    "Juan Perez",
		Picture: "employees/88c5d68b-4cac-466e-bb81-c0c4deb49534.jpg",
	},
	{
		Name:    "Pedro Perez",
		Picture: "employees/1399d998-b505-4ce2-b49b-bd8073de9b9e.jpg",
	},
}