chore: adding api(get) provinces in examples

examples/api-go/database/config.go

@@ -17,7 +17,7 @@ func InitDB() (*gorm.DB, error) {
 	user := os.Getenv("MYSQL_USER")
 	password := os.Getenv("MYSQL_PASSWORD")
 	host := os.Getenv("MYSQL_HOST")
-	name := os.Getenv("MYSQL_NAME")
+	name := os.Getenv("MYSQL_DATABASE")
 
 	dsn := user + ":" + password + "@tcp(" + host + ":3306)/" + name + "?charset=utf8mb4&parseTime=True&loc=Local"
 

examples/api-go/dtos/pagination_dto.go

@@ -0,0 +1,8 @@
+package dtos
+
+type PaginationDTO struct {
+	CurrentPage int `json:"current_page"`
+	PerPage     int `json:"per_page"`
+	TotalItems  int `json:"total_items"`
+	TotalPages  int `json:"total_pages"`
+}

examples/api-go/dtos/provinces_dto.go

@@ -0,0 +1,6 @@
+package dtos
+
+type ProvinceDTO struct {
+	Code string `json:"code"`
+	Name string `json:"name"`
+}

examples/api-go/dtos/response.go

@@ -0,0 +1,6 @@
+package dtos
+
+type ResponseDTO struct {
+	Pagination PaginationDTO `json:"pagination"`
+	Data       interface{}   `json:"data"`
+}

examples/api-go/handlers/provinces_handler.go

@@ -0,0 +1,103 @@
+package handlers
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/yuefii/NusantaraKita/examples/api-go/dtos"
+	"github.com/yuefii/NusantaraKita/examples/api-go/models"
+	"gorm.io/gorm"
+)
+
+type Handler struct {
+	db *gorm.DB
+}
+
+func NewHandler(db *gorm.DB) *Handler {
+	return &Handler{db}
+}
+
+func (handler *Handler) GetProvinces(ctx *gin.Context) {
+	var province []models.Provinces
+	var totalItems int64
+
+	showAll := ctx.Query("show_all") == "true"
+	pageStr := ctx.Query("page")
+	perPageStr := ctx.Query("per_page")
+
+	page := 1
+	perPage := 10
+
+	if pageStr != "" {
+		if p, err := strconv.Atoi(pageStr); err == nil && p > 0 {
+			page = p
+		}
+	}
+	if perPageStr != "" {
+		if pp, err := strconv.Atoi(perPageStr); err == nil && pp > 0 {
+			perPage = pp
+		}
+	}
+
+	if showAll {
+
+		result := handler.db.Find(&province)
+		if result.Error != nil {
+			ctx.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
+			return
+		}
+		totalItems = int64(len(province))
+
+		var provinceDTOs []dtos.ProvinceDTO
+		for _, r := range province {
+			provinceDTOs = append(provinceDTOs, dtos.ProvinceDTO{
+				Code: r.Code,
+				Name: r.Name,
+			})
+		}
+
+		response := gin.H{
+			"data": provinceDTOs,
+		}
+		ctx.JSON(http.StatusOK, response)
+		return
+	}
+
+	result := handler.db.Model(&models.Provinces{}).Count(&totalItems)
+	if result.Error != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
+		return
+	}
+
+	result = handler.db.Offset((page - 1) * perPage).Limit(perPage).Find(&province)
+	if result.Error != nil {
+		ctx.JSON(http.StatusInternalServerError, gin.H{"error": result.Error.Error()})
+		return
+	}
+
+	var provinceDTOs []dtos.ProvinceDTO
+	for _, response := range province {
+		provinceDTOs = append(provinceDTOs, dtos.ProvinceDTO{
+			Code: response.Code,
+			Name: response.Name,
+		})
+	}
+
+	totalPages := int(totalItems) / perPage
+	if int(totalItems)%perPage != 0 {
+		totalPages++
+	}
+
+	response := dtos.ResponseDTO{
+		Data: provinceDTOs,
+		Pagination: dtos.PaginationDTO{
+			CurrentPage: page,
+			PerPage:     perPage,
+			TotalItems:  int(totalItems),
+			TotalPages:  totalPages,
+		},
+	}
+
+	ctx.JSON(http.StatusOK, response)
+}

examples/api-go/models/provinces.go

@@ -0,0 +1,6 @@
+package models
+
+type Provinces struct {
+	Code string
+	Name string
+}

examples/api-go/routes/router.go

@@ -0,0 +1,13 @@
+package routes
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/yuefii/NusantaraKita/examples/api-go/handlers"
+	"gorm.io/gorm"
+)
+
+func SetupRoutes(router *gin.Engine, db *gorm.DB) {
+	handler := handlers.NewHandler(db)
+
+	router.GET("/api/provinces", handler.GetProvinces)
+}

main.go

@@ -6,14 +6,16 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/yuefii/NusantaraKita/examples/api-go/database"
+	"github.com/yuefii/NusantaraKita/examples/api-go/routes"
 )
 
 func main() {
-	_, err := database.InitDB()
+	db, err := database.InitDB()
 	if err != nil {
 		panic("failed to connect database.")
 	}
 	router := gin.Default()
+	routes.SetupRoutes(router, db)
 	router.GET("/", func(ctx *gin.Context) {
 		ctx.JSON(http.StatusOK, gin.H{"message": "project is running"})
 	})