main.go

package main

import (
	"context"
	"errors"
	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/credentials"
	"github.com/aws/aws-sdk-go-v2/service/dynamodb"
	"github.com/gin-gonic/gin"
	swaggerFiles "github.com/swaggo/files"
	ginSwagger "github.com/swaggo/gin-swagger"
	"log"
	"main/controller"
	"main/db"
	_ "main/docs"
	"main/env"
	"main/messaging"
	"main/util"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"
)

//	@title			cr24 Account API
//	@version		1.0
//	@description	API for account management for cr24 project
//	@termsOfService	http://swagger.io/terms/

//	@contact.name	David Slatinek
//	@contact.url	https://github.com/david-slatinek

//	@accept		json
//	@produce	json
//	@schemes	http

//	@license.name	GNU General Public License v3.0
//	@license.url	https://www.gnu.org/licenses/gpl-3.0.html

//	@securityDefinitions.apikey	JWT
//	@in							header
//	@name						Authorization

// @host		localhost:8080
// @BasePath	/api/v1
func main() {
	err := env.Load("env/.env")
	if err != nil {
		log.Fatalf("failed to load env variables: %s", err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	cfg, err := config.LoadDefaultConfig(context.TODO(),
		config.WithRegion(os.Getenv("REGION")),
		config.WithEndpointResolver(aws.EndpointResolverFunc(
			func(service, region string) (aws.Endpoint, error) {
				return aws.Endpoint{URL: "http://dynamodb:8000"}, nil
			})),
		config.WithCredentialsProvider(credentials.StaticCredentialsProvider{
			Value: aws.Credentials{
				AccessKeyID:     os.Getenv("AWS_ACCESS_KEY_ID"),
				SecretAccessKey: os.Getenv("AWS_SECRET_ACCESS_KEY"),
			},
		}),
	)
	if err != nil {
		log.Fatalf("failed to load SDK config, %s", err)
	}

	accountController := controller.AccountController{
		DB: &db.AccountDB{
			Client: dynamodb.NewFromConfig(cfg),
		},
	}

	gin.SetMode(os.Getenv("GIN_MODE"))

	router := gin.Default()

	msg := messaging.Messaging{}
	err = msg.Init()
	if err != nil {
		log.Printf("error with messaging: %s\n", err)
	} else {
		router.Use(msg.WriteInfo).Use(msg.WriteError)
		defer msg.Close()
	}

	router.Use(util.CORS)

	//api := router.Group("api/v1").Use(util.ValidateToken).Use(util.UploadStat)
	api := router.Group("api/v1").Use(util.ValidateToken)
	{
		api.POST("/account", accountController.Create)

		api.GET("/accounts/:type", accountController.GetAll)
		api.GET("/accounts/:type/transactions", accountController.GetAllWithTransactions)
		api.GET("/account/:accountID", accountController.GetAccount)

		api.PATCH("/account/:accountID/deposit", accountController.Deposit)
		api.PATCH("/account/:accountID/withdraw", accountController.Withdraw)
		api.PATCH("/account/:accountID/close", accountController.Close)

		api.DELETE("/account/:accountID", accountController.Delete)
	}
	router.GET("api/v1/login", util.RandomToken)
	router.GET("/docs/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))

	srv := &http.Server{
		Addr:         ":8080",
		WriteTimeout: time.Second * 15,
		ReadTimeout:  time.Second * 15,
		IdleTimeout:  time.Second * 60,
		Handler:      router,
	}

	go func() {
		log.Println("server is up at: " + srv.Addr)
		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Printf("ListenAndServe() error: %s\n", err)
		}
	}()

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt, os.Kill, syscall.SIGTERM)
	<-c

	ctx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	if err := srv.Shutdown(ctx); err != nil {
		log.Printf("Shutdown() error: %s\n", err)
	}

	log.Println("shutting down")
}