feat: New Localization module (#350)

* add localization feature

* add test cases for translator

* increase test coverage for file_loader

* add test cases for the remaining function of translator

* add test cases for the remaining function of translator

* add set method using http context

* chore: update mocks

* add SetLocale from http context

* chore: update mocks

* add assertion for http context in SetLocale

* re-order methods in translation contract

* fix linting

* fix formatting of error for translation

---------

Co-authored-by: kkumar-gcc <kkumar-gcc@users.noreply.github.com>

contracts/foundation/application.go

@@ -1,6 +1,8 @@
 package foundation
 
 import (
+	"context"
+
 	"github.com/goravel/framework/contracts/console"
 )
 
@@ -20,8 +22,18 @@ type Application interface {
 	DatabasePath(path string) string
 	// StoragePath get the path to the storage directory.
 	StoragePath(path string) string
+	// LangPath get the path to the language files.
+	LangPath(path string) string
 	// PublicPath get the path to the public directory.
 	PublicPath(path string) string
 	// Publishes register the given paths to be published by the "vendor:publish" command.
 	Publishes(packageName string, paths map[string]string, groups ...string)
+	// GetLocale get the current application locale.
+	GetLocale(ctx context.Context) string
+	// SetLocale set the current application locale.
+	SetLocale(ctx context.Context, locale string) context.Context
+	// Version gets the version number of the application.
+	Version() string
+	// IsLocale get the current application locale.
+	IsLocale(ctx context.Context, locale string) bool
 }

contracts/foundation/container.go

@@ -1,6 +1,8 @@
 package foundation
 
 import (
+	"context"
+
 	"github.com/goravel/framework/contracts/auth"
 	"github.com/goravel/framework/contracts/auth/access"
 	"github.com/goravel/framework/contracts/cache"
@@ -20,6 +22,7 @@ import (
 	"github.com/goravel/framework/contracts/route"
 	"github.com/goravel/framework/contracts/schedule"
 	"github.com/goravel/framework/contracts/testing"
+	"github.com/goravel/framework/contracts/translation"
 	"github.com/goravel/framework/contracts/validation"
 )
 
@@ -50,6 +53,8 @@ type Container interface {
 	MakeGrpc() grpc.Grpc
 	// MakeHash resolves the hash instance.
 	MakeHash() hash.Hash
+	// MakeLang resolves the lang instance.
+	MakeLang(ctx context.Context) translation.Translator
 	// MakeLog resolves the log instance.
 	MakeLog() log.Log
 	// MakeMail resolves the mail instance.

contracts/translation/loader.go

@@ -0,0 +1,6 @@
+package translation
+
+type Loader interface {
+	// Load the messages for the given locale.
+	Load(folder string, locale string) (map[string]map[string]string, error)
+}

contracts/translation/translator.go

@@ -0,0 +1,32 @@
+package translation
+
+import (
+	"context"
+)
+
+type Translator interface {
+	// Choice gets a translation according to an integer value.
+	Choice(key string, number int, options ...Option) (string, error)
+	// Get the translation for the given key.
+	Get(key string, options ...Option) (string, error)
+	// GetFallback get the current application/context fallback locale.
+	GetFallback() string
+	// GetLocale get the current application/context locale.
+	GetLocale() string
+	// Has checks if a translation exists for a given key.
+	Has(key string, options ...Option) bool
+	// SetFallback set the current application/context fallback locale.
+	SetFallback(locale string) context.Context
+	// SetLocale set the current application/context locale.
+	SetLocale(locale string) context.Context
+}
+
+type Option struct {
+	Fallback *bool
+	Locale   string
+	Replace  map[string]string
+}
+
+func Bool(value bool) *bool {
+	return &value
+}

facades/lang.go

@@ -0,0 +1,11 @@
+package facades
+
+import (
+	"context"
+
+	"github.com/goravel/framework/contracts/translation"
+)
+
+func Lang(ctx context.Context) translation.Translator {
+	return App().MakeLang(ctx)
+}

foundation/application.go

@@ -1,6 +1,7 @@
 package foundation
 
 import (
+	"context"
 	"flag"
 	"os"
 	"path/filepath"
@@ -81,6 +82,10 @@ func (app *Application) StoragePath(path string) string {
 	return filepath.Join("storage", path)
 }
 
+func (app *Application) LangPath(path string) string {
+	return filepath.Join("lang", path)
+}
+
 func (app *Application) PublicPath(path string) string {
 	return filepath.Join("public", path)
 }
@@ -97,6 +102,22 @@ func (app *Application) Publishes(packageName string, paths map[string]string, g
 	}
 }
 
+func (app *Application) Version() string {
+	return support.Version
+}
+
+func (app *Application) GetLocale(ctx context.Context) string {
+	return app.MakeLang(ctx).GetLocale()
+}
+
+func (app *Application) SetLocale(ctx context.Context, locale string) context.Context {
+	return app.MakeLang(ctx).SetLocale(locale)
+}
+
+func (app *Application) IsLocale(ctx context.Context, locale string) bool {
+	return app.GetLocale(ctx) == locale
+}
+
 func (app *Application) ensurePublishArrayInitialized(packageName string) {
 	if _, exist := app.publishes[packageName]; !exist {
 		app.publishes[packageName] = make(map[string]string)
@@ -219,7 +240,7 @@ func setEnv() {
 func setRootPath() {
 	rootPath := getCurrentAbsolutePath()
 
-	// Hack air path
+	// Hack the air path
 	airPath := "/storage/temp"
 	if strings.HasSuffix(rootPath, airPath) {
 		rootPath = strings.ReplaceAll(rootPath, airPath, "")

foundation/application_test.go

@@ -36,6 +36,7 @@ import (
 	supportdocker "github.com/goravel/framework/support/docker"
 	"github.com/goravel/framework/support/env"
 	"github.com/goravel/framework/support/file"
+	frameworktranslation "github.com/goravel/framework/translation"
 	"github.com/goravel/framework/validation"
 )
 
@@ -234,6 +235,23 @@ func (s *ApplicationTestSuite) TestMakeHash() {
 	mockConfig.AssertExpectations(s.T())
 }
 
+func (s *ApplicationTestSuite) TestMakeLang() {
+	mockConfig := &configmocks.Config{}
+	mockConfig.On("GetString", "app.locale").Return("en").Once()
+	mockConfig.On("GetString", "app.fallback_locale").Return("en").Once()
+
+	s.app.Singleton(frameworkconfig.Binding, func(app foundation.Application) (any, error) {
+		return mockConfig, nil
+	})
+
+	serviceProvider := &frameworktranslation.ServiceProvider{}
+	serviceProvider.Register(s.app)
+	ctx := http.Background()
+
+	s.NotNil(s.app.MakeLang(ctx))
+	mockConfig.AssertExpectations(s.T())
+}
+
 func (s *ApplicationTestSuite) TestMakeLog() {
 	serviceProvider := &frameworklog.ServiceProvider{}
 	serviceProvider.Register(s.app)

foundation/container.go

@@ -1,6 +1,7 @@
 package foundation
 
 import (
+	"context"
 	"fmt"
 	"sync"
 
@@ -30,6 +31,7 @@ import (
 	routecontract "github.com/goravel/framework/contracts/route"
 	schedulecontract "github.com/goravel/framework/contracts/schedule"
 	testingcontract "github.com/goravel/framework/contracts/testing"
+	translationcontract "github.com/goravel/framework/contracts/translation"
 	validationcontract "github.com/goravel/framework/contracts/validation"
 	"github.com/goravel/framework/crypt"
 	"github.com/goravel/framework/database"
@@ -44,6 +46,7 @@ import (
 	"github.com/goravel/framework/route"
 	"github.com/goravel/framework/schedule"
 	"github.com/goravel/framework/testing"
+	"github.com/goravel/framework/translation"
 	"github.com/goravel/framework/validation"
 )
 
@@ -167,6 +170,18 @@ func (c *Container) MakeHash() hashcontract.Hash {
 	return instance.(hashcontract.Hash)
 }
 
+func (c *Container) MakeLang(ctx context.Context) translationcontract.Translator {
+	instance, err := c.MakeWith(translation.Binding, map[string]any{
+		"ctx": ctx,
+	})
+	if err != nil {
+		color.Redln(err)
+		return nil
+	}
+
+	return instance.(translationcontract.Translator)
+}
+
 func (c *Container) MakeLog() logcontract.Log {
 	instance, err := c.Make(goravellog.Binding)
 	if err != nil {

http/context.go

@@ -38,3 +38,4 @@ func (r *Context) Request() http.ContextRequest {
 func (r *Context) Response() http.ContextResponse {
 	return nil
 }
+