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follow_controller.go
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/
follow_controller.go
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package controller
import (
"encoding/json"
"io/ioutil"
"log"
"net/http"
"strings"
"github.com/gold-kou/ToeBeans/backend/app/adapter/http/context"
"github.com/gold-kou/ToeBeans/backend/app/lib"
"github.com/gorilla/mux"
"github.com/gold-kou/ToeBeans/backend/app/adapter/http/helper"
"github.com/gold-kou/ToeBeans/backend/app/adapter/mysql"
"github.com/gold-kou/ToeBeans/backend/app/application/usecase"
modelHTTP "github.com/gold-kou/ToeBeans/backend/app/domain/model/http"
"github.com/gold-kou/ToeBeans/backend/app/domain/repository"
)
func FollowController(w http.ResponseWriter, r *http.Request) {
switch {
case r.URL.Path == "/follow":
switch r.Method {
case http.MethodPost:
err := registerFollow(r)
switch err := err.(type) {
case nil:
helper.ResponseSimpleSuccess(w)
case *helper.BadRequestError:
helper.ResponseBadRequest(w, err.Error())
case *helper.AuthorizationError:
helper.ResponseUnauthorized(w, err.Error())
case *helper.ForbiddenError:
helper.ResponseForbidden(w, err.Error())
case *helper.InternalServerError:
helper.ResponseInternalServerError(w, err.Error())
default:
helper.ResponseInternalServerError(w, err.Error())
}
default:
methods := []string{http.MethodPost}
helper.ResponseNotAllowedMethod(w, errMsgNotAllowedMethod, methods)
}
case strings.HasPrefix(r.URL.Path, "/follow/"):
switch r.Method {
case http.MethodDelete:
err := deleteFollow(r)
switch err := err.(type) {
case nil:
helper.ResponseSimpleSuccess(w)
case *helper.BadRequestError:
helper.ResponseBadRequest(w, err.Error())
case *helper.AuthorizationError:
helper.ResponseUnauthorized(w, err.Error())
case *helper.ForbiddenError:
helper.ResponseForbidden(w, err.Error())
case *helper.InternalServerError:
helper.ResponseInternalServerError(w, err.Error())
default:
helper.ResponseInternalServerError(w, err.Error())
}
default:
methods := []string{http.MethodDelete}
helper.ResponseNotAllowedMethod(w, errMsgNotAllowedMethod, methods)
}
default:
helper.ResponseInternalServerError(w, errMsgControllerPath)
}
}
func registerFollow(r *http.Request) error {
// not allowed to guest user
tokenUserName, err := context.GetTokenUserName(r.Context())
if tokenUserName == lib.GuestUserName {
log.Println(errMsgGuestUserForbidden)
return helper.NewForbiddenError(errMsgGuestUserForbidden)
}
// get request parameter
var reqRegisterFollow *modelHTTP.Follow
b, err := ioutil.ReadAll(r.Body)
if err != nil {
log.Println(err)
return helper.NewBadRequestError(err.Error())
}
defer r.Body.Close()
if err := json.Unmarshal(b, &reqRegisterFollow); err != nil {
log.Println(err)
return helper.NewBadRequestError(err.Error())
}
// validation check
err = reqRegisterFollow.ValidateParam()
if err != nil {
log.Println(err)
return helper.NewBadRequestError(err.Error())
}
// db connect
db, err := mysql.NewDB()
if err != nil {
log.Println(err)
return helper.NewInternalServerError(err.Error())
}
defer db.Close()
tx := mysql.NewDBTransaction(db)
// repository
userRepo := repository.NewUserRepository(db)
followRepo := repository.NewFollowRepository(db)
notificationRepo := repository.NewNotificationRepository(db)
// UseCase
u := usecase.NewRegisterFollow(r.Context(), tx, tokenUserName, reqRegisterFollow, userRepo, followRepo, notificationRepo)
if err = u.RegisterFollowUseCase(); err != nil {
log.Println(err)
if err == repository.ErrDuplicateData {
return helper.NewBadRequestError("Whoops, you already followed the user")
}
return helper.NewInternalServerError(err.Error())
}
return err
}
func deleteFollow(r *http.Request) error {
// not allowed to guest user
tokenUserName, err := context.GetTokenUserName(r.Context())
if err != nil {
return helper.NewAuthorizationError(err.Error())
}
if tokenUserName == lib.GuestUserName {
log.Println(errMsgGuestUserForbidden)
return helper.NewForbiddenError(errMsgGuestUserForbidden)
}
// get request parameter
vars := mux.Vars(r)
followedUserName, ok := vars["followed_user_name"]
if !ok || followedUserName == "" {
log.Println(err)
return helper.NewBadRequestError("followed_user_name: cannot be blank.")
}
// db connect
db, err := mysql.NewDB()
if err != nil {
log.Println(err)
return helper.NewInternalServerError(err.Error())
}
defer db.Close()
tx := mysql.NewDBTransaction(db)
// repository
userRepo := repository.NewUserRepository(db)
followRepo := repository.NewFollowRepository(db)
// UseCase
u := usecase.NewDeleteFollow(r.Context(), tx, tokenUserName, followedUserName, userRepo, followRepo)
if err = u.DeleteFollowUseCase(); err != nil {
log.Println(err)
if err == repository.ErrNotExistsData {
return helper.NewBadRequestError(err.Error())
}
return helper.NewInternalServerError(err.Error())
}
return err
}