Defining the Comment Service Image Defining the Comment Service

Defining the Comment Service

February 13, 2021

Course Instructor: Elliot Forbes

Hey Gophers! My name is Elliot and I'm the creator of TutorialEdge and I've been working with Go systems for roughly 5 years now. Feel free to reach out to me on twitter - @Elliot_F

Now that we have our database setup, we have everything we need to start implementing our comment service and build it in a test-driven way.

We’ll start off by defining the interface for our comment service:

package comment

import (
	"time"

	"github.com/jinzhu/gorm"
)

// Service - our comment service
type Service struct {
	DB *gorm.DB
}

// CommentService -
type CommentService interface {
}

// NewService - returns a new comments service
func NewService(db *gorm.DB) *Service {
	return &Service{
		DB: db,
	}
}

Next, we’ll need to define the methods that we want to be part of this service and we’ll also need to define the struct for our Comment object:

package comment

import (
	"time"

	"github.com/jinzhu/gorm"
)

// Service - our comment service
type Service struct {
	DB *gorm.DB
}

// Comment -
type Comment struct {
	gorm.Model
	Slug    string
	Body    string
	Author  string
	Created time.Time
}

// CommentService -
type CommentService interface {
	GetComment(ID uint) (Comment, error)
	PostComment(comment Comment) (Comment, error)
	UpdateComment(ID uint, newComment Comment) (Comment, error)
	DeleteComment(ID uint) error
	GetAllComments() ([]Comment, error)
}

// NewService - returns a new comments service
func NewService(db *gorm.DB) *Service {
	return &Service{
		DB: db,
	}
}

In the next video, we’ll be implementing the tests that will ensure the implementation of our service is correct.