feat: login service and implement database storage

internal/accessor/module.go

@@ -0,0 +1,10 @@
+package repository
+
+import (
+	staffrepository "github.com/ardeman/project-legalgo-go/internal/accessor/staff"
+	"go.uber.org/fx"
+)
+
+var Module = fx.Module("repository", fx.Provide(
+	staffrepository.New,
+))

internal/accessor/staff/get_staff.go

@@ -0,0 +1,25 @@
+package staffrepository
+
+import (
+	"errors"
+
+	staffmodel "github.com/ardeman/project-legalgo-go/database/staff"
+	"gorm.io/gorm"
+)
+
+func (sr *StaffRepository) GetStaff(email string) (*staffmodel.Staff, error) {
+	var staff staffmodel.Staff
+
+	if email == "" {
+		return nil, errors.New("email is empty")
+	}
+
+	if err := sr.DB.Where("email = ?", email).First(&staff).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, errors.New("staff not found")
+		}
+		return nil, err
+	}
+
+	return &staff, nil
+}

internal/accessor/staff/impl.go

@@ -0,0 +1,18 @@
+package staffrepository
+
+import (
+	"github.com/ardeman/project-legalgo-go/database"
+	staffmodel "github.com/ardeman/project-legalgo-go/database/staff"
+)
+
+type StaffRepository struct {
+	DB *database.DB
+}
+
+type StaffInterface interface {
+	GetStaff(string) (*staffmodel.Staff, error)
+}
+
+func New(db *database.DB) StaffInterface {
+	return &StaffRepository{db}
+}

internal/api/http/auth/login.go

@@ -0,0 +1,67 @@
+package authhttp
+
+import (
+	"net/http"
+
+	domain "github.com/ardeman/project-legalgo-go/internal/domain/auth"
+	serviceauth "github.com/ardeman/project-legalgo-go/internal/services/auth"
+	"github.com/ardeman/project-legalgo-go/internal/utilities/response"
+	"github.com/ardeman/project-legalgo-go/internal/utilities/utils"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-playground/validator/v10"
+)
+
+func LoginStaff(
+	router chi.Router,
+	authSvc serviceauth.LoginStaffIntf,
+	validate *validator.Validate,
+) {
+	router.Post("/staff/login", func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+
+		var request domain.StaffLoginReq
+
+		if err := utils.UnmarshalBody(r, &request); err != nil {
+			response.ResponseWithErrorCode(
+				ctx,
+				w,
+				err,
+				response.ErrBadRequest.Code,
+				response.ErrBadRequest.HttpCode,
+				"failed to unmarshal request",
+			)
+			return
+		}
+
+		if err := validate.Struct(request); err != nil {
+			response.ResponseWithErrorCode(
+				ctx,
+				w,
+				err,
+				response.ErrBadRequest.Code,
+				response.ErrBadRequest.HttpCode,
+				err.(validator.ValidationErrors).Error(),
+			)
+			return
+		}
+
+		token, err := authSvc.LoginAsStaff(request.Email)
+		if err != nil {
+			response.ResponseWithErrorCode(
+				ctx,
+				w,
+				err,
+				response.ErrBadRequest.Code,
+				response.ErrBadRequest.HttpCode,
+				err.Error(),
+			)
+			return
+		}
+
+		responsePayload := &domain.StaffLoginResponse{
+			Token: token,
+		}
+
+		response.RespondJsonSuccess(ctx, w, responsePayload)
+	})
+}

internal/api/http/auth/module.go

@@ -0,0 +1,9 @@
+package authhttp
+
+import "go.uber.org/fx"
+
+var Module = fx.Module("auth-api",
+	fx.Invoke(
+		LoginStaff,
+	),
+)

internal/api/http/router.go

@@ -1,15 +1,21 @@
 package internalhttp
 
 import (
+	authhttp "github.com/ardeman/project-legalgo-go/internal/api/http/auth"
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/cors"
+	"github.com/go-playground/validator/v10"
 	"go.uber.org/fx"
 
 	chimware "github.com/go-chi/chi/v5/middleware"
 )
 
 var Module = fx.Module("router",
-	fx.Provide(initRouter),
+	fx.Provide(
+		initRouter,
+		validator.New,
+	),
+	authhttp.Module,
 )
 
 func initRouter() chi.Router {

internal/domain/auth/staff.go

@@ -0,0 +1,10 @@
+package domain
+
+type StaffLoginReq struct {
+	Email    string `json:"email" validate:"required"`
+	Password string `json:"password" validate:"required"`
+}
+
+type StaffLoginResponse struct {
+	Token string `json:"token"`
+}

internal/services/auth/impl.go

@@ -0,0 +1,19 @@
+package serviceauth
+
+import staffrepository "github.com/ardeman/project-legalgo-go/internal/accessor/staff"
+
+type LoginStaffSvc struct {
+	staffAcs staffrepository.StaffInterface
+}
+
+type LoginStaffIntf interface {
+	LoginAsStaff(string) (string, error)
+}
+
+func New(
+	staffAcs staffrepository.StaffInterface,
+) LoginStaffIntf {
+	return &LoginStaffSvc{
+		staffAcs: staffAcs,
+	}
+}

internal/services/auth/login_as_staff.go

@@ -0,0 +1,21 @@
+package serviceauth
+
+import (
+	"errors"
+
+	"github.com/ardeman/project-legalgo-go/internal/utilities/utils"
+)
+
+func (sv *LoginStaffSvc) LoginAsStaff(email string) (string, error) {
+	staff, err := sv.staffAcs.GetStaff(email)
+	if err != nil {
+		return "", errors.New(err.Error())
+	}
+
+	token, err := utils.GenerateToken2(staff.Email)
+	if err != nil {
+		return "", errors.New(err.Error())
+	}
+
+	return token, nil
+}

internal/services/module.go

@@ -0,0 +1,12 @@
+package services
+
+import (
+	serviceauth "github.com/ardeman/project-legalgo-go/internal/services/auth"
+	"go.uber.org/fx"
+)
+
+var Module = fx.Module("services",
+	fx.Provide(
+		serviceauth.New,
+	),
+)

internal/utilities/response/error_code.go

@@ -0,0 +1,15 @@
+package response
+
+import "net/http"
+
+type ErrorCode struct {
+	Code     string
+	Message  string
+	HttpCode int
+}
+
+var (
+	// 4xx
+	ErrBadRequest = ErrorCode{Code: "BAD_REQUEST", Message: "BAD_REQUEST", HttpCode: http.StatusBadRequest}
+	ErrDBRequest  = ErrorCode{Code: "BAD_DB_REQUEST", Message: "DB_ERROR", HttpCode: http.StatusBadRequest}
+)

internal/utilities/response/error_with_code.go

@@ -0,0 +1,23 @@
+package response
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+)
+
+func ResponseWithErrorCode(ctx context.Context, w http.ResponseWriter,
+	err error, code string, statusCode int, message string) {
+	setDefaultHeaders(ctx, w.Header())
+
+	w.WriteHeader(statusCode)
+
+	b, _ := json.Marshal(ErrorResponse{
+		Error: ErrorResponseData{
+			Code:    code,
+			Message: message,
+		},
+	})
+
+	w.Write(b)
+}

internal/utilities/response/set_default_headers.go

@@ -0,0 +1,19 @@
+package response
+
+import (
+	"context"
+	"net/http"
+)
+
+type ErrorResponseData struct {
+	Code    string `json:"code"`
+	Message string `json:"message"`
+}
+
+type ErrorResponse struct {
+	Error ErrorResponseData `json:"error"`
+}
+
+func setDefaultHeaders(ctx context.Context, headers http.Header) {
+	headers.Set("Content-Type", "application/json")
+}

internal/utilities/response/success.go

@@ -0,0 +1,23 @@
+package response
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+)
+
+type Response[T any] struct {
+	Data T `json:"data"`
+}
+
+func RespondJsonSuccess[T any](ctx context.Context, w http.ResponseWriter, data T) {
+	setDefaultHeaders(ctx, w.Header())
+
+	w.WriteHeader(http.StatusOK)
+
+	b, _ := json.Marshal(Response[T]{
+		Data: data,
+	})
+
+	w.Write(b)
+}

internal/utilities/utils/body_payload.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+)
+
+func UnmarshalBody(r *http.Request, v any) error {
+	body, err := io.ReadAll(r.Body)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(body, v)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

internal/utilities/utils/jwt.go

@@ -28,11 +28,11 @@ func GenerateToken(options ...ClaimOption) (string, error) {
 	return token.SignedString(jwtSecret)
 }
 
-func GenerateToken2(username string) (string, error) {
+func GenerateToken2(email string) (string, error) {
 	now := timeutils.Now()
-	token := jwt.New(jwt.SigningMethodES256)
+	token := jwt.New(jwt.SigningMethodHS256)
 	claims := token.Claims.(jwt.MapClaims)
-	claims["username"] = username
+	claims["email"] = email
 	claims["exp"] = now.Add(time.Hour).Unix()
 
 	return token.SignedString(jwtSecret)