feat: add product list api

pkg/err_msg/message.go

@@ -1,6 +1,23 @@
 package errmsg
 
+type ErrorResponse struct {
+	Message         string                 `json:"message"`                       // General error message
+	Errors          map[string]interface{} `json:"errors,omitempty"`              // Additional detail of error
+	InternalErrCode string                 `json:"internal_error_code,omitempty"` // Custom error code (optional)
+}
+
+func (e ErrorResponse) Error() string {
+	return e.Message
+}
+
 const (
+	ErrValidationFailed                        = "input validation failed"
+	ErrUnexpectedError                         = "unexpected error occurred"
+	ErrInvalidRequestFormat                    = "invalid request format"
+	ErrGetUserInfo                             = "get user info failed"
+	ErrFailedDecodeBase64                      = "decode data to base 64 failed"
+	ErrFailedUnmarshalJson                     = "unmarshal data to JSON failed"
+	ErrUnauthorized                            = "unauthorized"
 	ErrorMsgAdminNotAllowed                    = "admin is not allowed"
 	ErrorMsgNotFound                           = "record not found"
 	ErrorMsgSomethingWentWrong                 = "something went wrong"

productapp/app.go

@@ -3,6 +3,7 @@ package productapp
 import (
 	"context"
 	"fmt"
+	"git.gocasts.ir/ebhomengo/niki/productapp/service/product"
 	"log"
 
 	httpserver "git.gocasts.ir/ebhomengo/niki/delivery/http_server"
@@ -25,6 +26,7 @@ type Config struct {
 type Application struct {
 	Config     Config
 	HTTPServer *producthttp.Server
+	productSvc product.Service
 	DB         *productdb.DB
 	Echo       *echo.Echo
 }
@@ -40,11 +42,14 @@ func Setup(cfg Config) *Application {
 		Router: e,
 	}
 
-	srv := producthttp.NewServer(hsrv)
+	productSvc := product.New(productDB)
+
+	srv := producthttp.NewServer(hsrv, productSvc)
 	srv.RegisterRoutes()
 
 	return &Application{
 		Config:     cfg,
+		productSvc: productSvc,
 		HTTPServer: srv,
 		DB:         productDB,
 		Echo:       e,

productapp/delivery/http/handler.go

@@ -1,17 +1,38 @@
 package http
 
 import (
-	"net/http"
-
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+	"git.gocasts.ir/ebhomengo/niki/productapp/service/product"
 	"github.com/labstack/echo/v4"
+	"log/slog"
+	"net/http"
 )
 
-type Handler struct{}
-
-func NewHandler() *Handler {
-	return &Handler{}
+type Handler struct {
+	productService product.Service
+	Logger         *slog.Logger
 }
 
-func (h Handler) HealthCheck(c echo.Context) error {
-	return c.JSON(http.StatusOK, map[string]string{"status": "ok"})
+func NewHandler(productService product.Service) *Handler {
+	return &Handler{
+		productService: productService,
+	}
+}
+
+func (h Handler) getProductList(c echo.Context) error {
+	var req product.GetProductListRequest
+
+	if err := c.Bind(&req); err != nil {
+		return c.JSON(http.StatusBadRequest, errmsg.ErrorResponse{
+			Message: errmsg.ErrInvalidRequestFormat,
+		})
+	}
+
+	response, err := h.productService.GetProducts(c.Request().Context(), req)
+	if err != nil {
+		// todo handle validation error
+		return c.JSON(http.StatusInternalServerError, map[string]string{"error": err.Error()})
+	}
+
+	return c.JSON(http.StatusOK, response)
 }

productapp/delivery/http/health_check.go

@@ -0,0 +1,11 @@
+package http
+
+import (
+	"net/http"
+
+	"github.com/labstack/echo/v4"
+)
+
+func (h Handler) HealthCheck(c echo.Context) error {
+	return c.JSON(http.StatusOK, map[string]string{"status": "healthy"})
+}

productapp/delivery/http/route.go

@@ -1 +0,0 @@
-package http

productapp/delivery/http/server.go

@@ -1,16 +1,19 @@
 package http
 
-import httpserver "git.gocasts.ir/ebhomengo/niki/delivery/http_server"
+import (
+	httpserver "git.gocasts.ir/ebhomengo/niki/delivery/http_server"
+	"git.gocasts.ir/ebhomengo/niki/productapp/service/product"
+)
 
 type Server struct {
 	HTTPServer *httpserver.Server
 	Handler    *Handler
 }
 
-func NewServer(httpserver *httpserver.Server) *Server {
+func NewServer(httpserver *httpserver.Server, productSvc product.Service) *Server {
 	return &Server{
 		HTTPServer: httpserver,
-		Handler:    NewHandler(),
+		Handler:    NewHandler(productSvc),
 	}
 }
 
@@ -22,5 +25,10 @@ func (s *Server) Stop() {}
 
 func (s *Server) RegisterRoutes() {
 	r := s.HTTPServer.Router
-	r.GET("health-check", s.Handler.HealthCheck)
+	r.GET("health-check/1", s.Handler.HealthCheck)
+
+	productGroup := r.Group("/v1/products")
+
+	productGroup.GET("", s.Handler.getProductList)
+
 }

productapp/repository/database/db.go

@@ -1,6 +1,11 @@
 package database
 
-import "git.gocasts.ir/ebhomengo/niki/repository/mysql"
+import (
+	"context"
+	richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+	"git.gocasts.ir/ebhomengo/niki/productapp/service/product"
+	"git.gocasts.ir/ebhomengo/niki/repository/mysql"
+)
 
 type DB struct {
 	conn *mysql.DB
@@ -11,3 +16,42 @@ func New(conn *mysql.DB) *DB {
 		conn: conn,
 	}
 }
+
+func (db *DB) GetProducts(ctx context.Context, page, pageSize uint) ([]product.Product, error) {
+	const Op = "domain.repository.mysql.order.get-shipping"
+
+	query := "SELECT * FROM products ORDER BY id DESC limit ? offset ?"
+	rows, err := db.conn.Conn().Query(query, page, pageSize)
+
+	if rows.Err() != nil {
+		return []product.Product{}, richerror.New(Op).WithErr(err)
+	}
+
+	defer rows.Close()
+
+	var products []product.Product
+
+	for rows.Next() {
+		var s product.Product
+
+		err := rows.Scan(
+			&s.ID,
+			&s.Name,
+			&s.Slug,
+			&s.Description,
+			&s.Price,
+			&s.Stock,
+			&s.IsActive,
+			&s.Features,
+			&s.CreatedAt,
+			&s.DeletedAt,
+		)
+		if err != nil {
+			return nil, richerror.New(Op).WithErr(err)
+		}
+
+		products = append(products, s)
+	}
+
+	return products, nil
+}

productapp/service/product/entity.go

@@ -6,16 +6,16 @@ import (
 )
 
 type Product struct {
-	ID          uint
-	Name        string
-	Slug        string
-	Description string
-	Price       float64
-	Stock       int
-	IsActive    bool
-	Features    string
-	CreatedAt   time.Time
-	DeletedAt   sql.NullTime
+	ID          uint         `json:"id"`
+	Name        string       `json:"name"`
+	Slug        string       `json:"slug"`
+	Description string       `json:"description"`
+	Price       float64      `json:"price"`
+	Stock       int          `json:"stock"`
+	IsActive    bool         `json:"is_active"`
+	Features    string       `json:"features"`
+	CreatedAt   time.Time    `json:"created_at"`
+	DeletedAt   sql.NullTime `json:"-"`
 }
 
 type ProductImage struct {

productapp/service/product/message.go

@@ -0,0 +1,13 @@
+package product
+
+import "errors"
+
+var (
+	ErrFailedGetProductList      = errors.New("failed to get products list")
+	ErrFailedCreateProduct       = errors.New("failed to create product")
+	ErrFailedFindProduct         = errors.New("failed to find product")
+	ErrCantAccessToUpdateProduct = errors.New("you are not allowed to edit this product")
+	ErrFailedUpdateProduct       = errors.New("failed to update product")
+	ErrFailedToPreparedStatement = errors.New("failed to prepared statement: %v")
+	ErrCantAccess                = errors.New("you are not allowed to this action")
+)

productapp/service/product/param.go

@@ -1 +1,12 @@
 package product
+
+import "git.gocasts.ir/ebhomengo/niki/param"
+
+type GetProductListRequest struct {
+	param.PaginationRequest
+}
+
+type GetProductListResponse struct {
+	Data []Product `json:"data"`
+	param.PaginationResponse
+}

productapp/service/product/service.go

@@ -1 +1,38 @@
 package product
+
+import (
+	"context"
+	"fmt"
+	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
+)
+
+type Repository interface {
+	GetProducts(ctx context.Context, page, pageSize uint) ([]Product, error)
+}
+
+type Service struct {
+	repository Repository
+}
+
+func New(repo Repository) Service {
+	return Service{
+		repository: repo,
+	}
+}
+
+func (s Service) GetProducts(ctx context.Context, req GetProductListRequest) (GetProductListResponse, error) {
+
+	page := req.GetPageNumber()
+	pageSize := req.PageSize
+
+	products, err := s.repository.GetProducts(ctx, page, pageSize)
+	if err != nil {
+		fmt.Println(err)
+		return GetProductListResponse{}, errmsg.ErrorResponse{
+			Message: ErrFailedGetProductList.Error(),
+			Errors:  map[string]interface{}{"repository_error": err.Error()},
+		}
+	}
+
+	return GetProductListResponse{Data: products}, nil
+}