feat: login service and implement database storage

.gitignore

@@ -1 +1,2 @@
 bin
+.env

README.md

@@ -0,0 +1,102 @@
+# Instructions: Setup Go Version 1.24.0, Manage Dependencies, Build, and Run
+
+## Prerequisites
+
+Before proceeding, make sure you have the following installed on your computer:
+
+- **Go (Golang) version 1.24.0**
+- **Make**
+
+## Steps to Install Go 1.24.0
+
+### For Windows:
+1. Download the installer from [official Go website](https://golang.org/dl/).
+2. Run the downloaded `.msi` file and follow the installation wizard.
+3. During installation, you may be prompted to set the `GOPATH` and `GOROOT`. Choose the appropriate settings
+based on your preference or keep the default values.
+
+### For macOS:
+1. Open Terminal.
+2. Download the package using Homebrew (if not installed, visit [Homebrew website](https://brew.sh/) for
+installation instructions):
+   ```bash
+   brew install go@1.24
+   ```
+3. Link the installed version to your PATH:
+   ```bash
+   brew link --overwrite --force go@1.24
+   ```
+
+### For Linux:
+1. Open Terminal.
+2. Download the appropriate tarball from [official Go website](https://golang.org/dl/).
+3. Extract the downloaded archive:
+   ```bash
+   tar -C /usr/local -xzf go1.24.linux-amd64.tar.gz
+   ```
+4. Add Go to your PATH by editing your shell configuration file (e.g., `.bashrc`, `.zshrc`):
+   ```bash
+   echo 'export PATH=$PATH:/usr/local/go/bin' >> ~/.bashrc
+   source ~/.bashrc
+   ```
+
+## Verify Installation
+
+After installation, verify that Go 1.24.0 is installed correctly by running:
+```bash
+go version
+```
+You should see an output like `go version go1.24 darwin/amd64` (or similar, depending on your OS).
+
+## Install Make (if not already installed)
+
+### For Windows:
+- Download and install [Make for Windows](http://gnuwin32.sourceforge.net/packages/make.htm).
+- Add the installation directory to your PATH.
+
+### For macOS:
+1. Open Terminal.
+2. Install Make using Homebrew:
+   ```bash
+   brew install make
+   ```
+
+### For Linux:
+Make is usually pre-installed on most Linux distributions. If it's not installed, you can install it using your
+package manager (e.g., `sudo apt-get install make` for Ubuntu).
+
+## Navigate to Your Go Project Directory
+
+Open Terminal and navigate to the root directory of your Go project.
+
+## Resolve Dependencies with `go mod tidy`
+
+Run the following command to download and resolve all dependencies specified in your `go.mod` file:
+```bash
+go mod tidy
+```
+
+## Build the Binary Using `make build`
+
+Run the following command to build your project. The binary will be placed in the `bin` folder.
+```bash
+make build
+```
+
+## Run the Program Using `make run`
+
+Finally, you can run your program using:
+```bash
+make run
+```
+
+This command will compile and execute your Go application.
+
+---
+
+**Note:** Ensure that your `Makefile` is correctly set up to handle these commands. If not, you may need to create
+or adjust it accordingly.
+```
+
+Please follow the above instructions to set up Go version 1.24.0, manage dependencies using `go mod tidy`, build a
+binary with `make build`, and run your application with `make run`.

cmd/legalgo/main.go

@@ -1,17 +1,61 @@
 package main
 
 import (
+	"context"
+	"fmt"
+	"log"
+
+	"github.com/ardeman/project-legalgo-go/database"
+	repository "github.com/ardeman/project-legalgo-go/internal/accessor"
 	internalhttp "github.com/ardeman/project-legalgo-go/internal/api/http"
 	pkgconfig "github.com/ardeman/project-legalgo-go/internal/config"
+	"github.com/ardeman/project-legalgo-go/internal/services"
 	"github.com/go-chi/chi/v5"
+	"github.com/joho/godotenv"
 	"go.uber.org/fx"
 )
 
-func main() {
+func init() {
-	fx.New(
+	if err := godotenv.Load(); err != nil {
-		internalhttp.Module,
+		log.Fatal("cannot load environment file")
-		fx.Invoke(func(apiRouter chi.Router) {
+	}
-			pkgconfig.Router(apiRouter)
+}
-		}),
+
-	)
+func run(lc fx.Lifecycle, db *database.DB, apiRouter chi.Router) {
+	lc.Append(fx.Hook{
+		OnStart: func(ctx context.Context) error {
+			fmt.Println("Application has started...")
+			// Run migration
+			if err := db.Migrate(); err != nil {
+				log.Fatal("Migration failed: ", err)
+			}
+
+			pkgconfig.Router(apiRouter)
+
+			return nil
+		},
+		OnStop: func(ctx context.Context) error {
+			fmt.Println("Shutting down...")
+			return nil
+		},
+	})
+}
+
+func main() {
+	app := fx.New(
+		database.Module,
+		repository.Module,
+		internalhttp.Module,
+		services.Module,
+		fx.Invoke(run),
+	)
+
+	if err := app.Start(context.Background()); err != nil {
+		log.Fatal("Error starting app:", err)
+	}
+
+	// Wait for the app to stop gracefully
+	if err := app.Stop(context.Background()); err != nil {
+		log.Fatal("Error stopping app:", err)
+	}
 }

database/module.go

@@ -0,0 +1,7 @@
+package database
+
+import "go.uber.org/fx"
+
+var Module = fx.Module("database", fx.Provide(
+	NewDB,
+))

database/new_db.go

@@ -0,0 +1,43 @@
+package database
+
+import (
+	"fmt"
+	"os"
+
+	staffmodel "github.com/ardeman/project-legalgo-go/database/staff"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+type DB struct {
+	*gorm.DB
+}
+
+func NewDB() (*DB, error) {
+	var (
+		host     = os.Getenv("DB_HOST")
+		user     = os.Getenv("DB_USER")
+		password = os.Getenv("DB_PASSWORD")
+		dbName   = os.Getenv("DB_NAME")
+		dbPort   = os.Getenv("DB_PORT")
+	)
+
+	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%v sslmode=disable", host, user, password, dbName, dbPort)
+
+	if dsn == "" {
+		return nil, fmt.Errorf("DATABASE_URL environment is not set")
+	}
+
+	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to connect to database: %w", err)
+	}
+
+	return &DB{db}, nil
+}
+
+func (db *DB) Migrate() error {
+	// Auto Migrate the User model
+	return db.AutoMigrate(&staffmodel.Staff{})
+}

database/staff/model.go

@@ -0,0 +1,11 @@
+package staffmodel
+
+import (
+	"github.com/google/uuid"
+)
+
+type Staff struct {
+	ID       uuid.UUID `gorm:"type:uuid;primaryKey" json:"id"`
+	Email    string    `gorm:"unique,not null" json:"email"`
+	Password string    `gorm:"not null" json:"password"`
+}

go.mod

@@ -7,12 +7,32 @@ require (
 	go.uber.org/fx v1.23.0
 )
 
+require (
+	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.7.2 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	golang.org/x/crypto v0.34.0 // indirect
+	golang.org/x/net v0.34.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
+	gorm.io/driver/postgres v1.5.11 // indirect
+)
+
 require (
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/go-chi/chi v1.5.5
 	github.com/go-chi/chi/v5 v5.2.1 // indirect
 	github.com/go-chi/cors v1.2.1
+	github.com/go-playground/validator/v10 v10.25.0
+	github.com/google/uuid v1.6.0
 	github.com/redis/go-redis/v9 v9.7.1 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	go.uber.org/dig v1.18.0 // indirect
@@ -20,4 +40,5 @@ require (
 	go.uber.org/zap v1.26.0 // indirect
 	golang.org/x/sync v0.11.0
 	golang.org/x/sys v0.30.0 // indirect
+	gorm.io/gorm v1.25.12
 )

go.sum

@@ -5,14 +5,40 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
+github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
 github.com/go-chi/chi v1.5.5 h1:vOB/HbEMt9QqBqErz07QehcOKHaWFtuj87tTDVz2qXE=
 github.com/go-chi/chi v1.5.5/go.mod h1:C9JqLr3tIYjDOZpzn+BCuxY8z8vmca43EeMgyZt7irw=
 github.com/go-chi/chi/v5 v5.2.1 h1:KOIHODQj58PmL80G2Eak4WdvUzjSJSm0vG72crDCqb8=
 github.com/go-chi/chi/v5 v5.2.1/go.mod h1:L2yAIGWB3H+phAw1NxKwWM+7eUH/lU8pOMm5hHcoops=
 github.com/go-chi/cors v1.2.1 h1:xEC8UT3Rlp2QuWNEr4Fs/c2EAGVKBwy/1vHx3bppil4=
 github.com/go-chi/cors v1.2.1/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.25.0 h1:5Dh7cjvzR7BRZadnsVOzPhWsrwUr0nmsZJxEAnFLNO8=
+github.com/go-playground/validator/v10 v10.25.0/go.mod h1:GGzBIJMuE98Ic/kJsBXbz1x/7cByt++cQ+YOuDM5wus=
 github.com/golang-jwt/jwt/v5 v5.2.1 h1:OuVbFODueb089Lh128TAcimifWaLhJwVflnrgM17wHk=
 github.com/golang-jwt/jwt/v5 v5.2.1/go.mod h1:pqrtFR0X4osieyHYxtmOUWsAWrfe1Q5UVIyoH402zdk=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.7.2 h1:mLoDLV6sonKlvjIEsV56SkWNCnuNv531l94GaIzO+XI=
+github.com/jackc/pgx/v5 v5.7.2/go.mod h1:ncY89UGWxg82EykZUwSpUKEfccBGGYq1xjrOpsbsfGQ=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/redis/go-redis/v9 v9.7.1 h1:4LhKRCIduqXqtvCUlaq9c8bdHOkICjDMrr1+Zb3osAc=
@@ -20,6 +46,7 @@ github.com/redis/go-redis/v9 v9.7.1/go.mod h1:f6zhXITC7JUJIlPEiBOTXxJgPLdZcA93Ge
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
@@ -33,12 +60,26 @@ go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ=
 go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.26.0 h1:sI7k6L95XOKS281NhVKOFCUNIvv9e0w4BF8N3u+tCRo=
 go.uber.org/zap v1.26.0/go.mod h1:dtElttAiwGvoJ/vj4IwHBS/gXsEu/pZ50mUIRWuG0so=
+golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
+golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
+golang.org/x/crypto v0.34.0 h1:+/C6tk6rf/+t5DhUketUbD1aNGqiSX3j15Z6xuIDlBA=
+golang.org/x/crypto v0.34.0/go.mod h1:dy7dXNW32cAb/6/PRuTNsix8T+vJAqvuIy5Bli/x0YQ=
+golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
 golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
 golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
 golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/postgres v1.5.11 h1:ubBVAfbKEUld/twyKZ0IYn9rSQh448EdelLYk9Mv314=
+gorm.io/driver/postgres v1.5.11/go.mod h1:DX3GReXH+3FPWGrrgffdvCk3DQ1dwDPdmbenSkweRGI=
+gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
+gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=

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)