Merge pull request #156 from acara-app/feature/preferred-language

feat: add preferred language feature for users

Author: tuvshinjargal

app/Ai/Agents/AssistantAgent.php

@@ -17,6 +17,7 @@
 use App\Ai\Tools\SuggestWorkoutRoutine;
 use App\Contracts\Ai\Advisor;
 use App\Enums\AgentMode;
+use App\Enums\PreferredLanguage;
 use App\Models\History;
 use App\Models\User;
 use Laravel\Ai\Concerns\RemembersConversations;
@@ -143,11 +144,15 @@ private function getContextInstructions(array $profileData): array
     {
         /** @var string $profileContext */
         $profileContext = $profileData['context'];
+        $language = $this->getUser()->preferred_language ?? PreferredLanguage::English;
+
         $context = [
             'USER PROFILE CONTEXT:',
             $profileContext,
             '',
             'CHAT MODE: '.$this->mode->value,
+            '',
+            'LANGUAGE: Your default language is '.$language->label().' ('.$language->value.'). Respond in this language unless the user writes in a different language — in that case, naturally mirror their language.',
         ];
 
         if ($this->mode === AgentMode::CreateMealPlan) {

app/Enums/PreferredLanguage.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enums;
+
+enum PreferredLanguage: string
+{
+    case English = 'en';
+    case French = 'fr';
+    case Mongolian = 'mn';
+
+    /**
+     * @return array<string, string>
+     */
+    public static function toArray(): array
+    {
+        return [
+            self::English->value => self::English->label(),
+            self::French->value => self::French->label(),
+            self::Mongolian->value => self::Mongolian->label(),
+        ];
+    }
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::English => 'English',
+            self::French => 'Français',
+            self::Mongolian => 'Монгол',
+        };
+    }
+}

app/Http/Controllers/ChatController.php

@@ -9,13 +9,19 @@
 use App\Http\Requests\StoreAgentConversationRequest;
 use App\Models\Conversation;
 use App\Models\History;
+use App\Models\User;
+use Illuminate\Container\Attributes\CurrentUser;
 use Illuminate\Http\Request;
 use Inertia\Inertia;
 use Inertia\Response;
 use Laravel\Ai\Responses\StreamableAgentResponse;
 
-final class ChatController
+final readonly class ChatController
 {
+    public function __construct(
+        #[CurrentUser] private User $user,
+    ) {}
+
     public function create(
         Request $request,
         string $conversationId = ''
@@ -42,9 +48,10 @@ public function create(
     public function stream(
         StoreAgentConversationRequest $request
     ): StreamableAgentResponse {
-        $agent = resolve(Advisor::class, ['user' => $request->user()])
+
+        $agent = resolve(Advisor::class, ['user' => $this->user])
             ->withMode($request->mode())
-            ->forUser($request->user());
+            ->forUser($this->user);
 
         return $agent
             ->stream(

app/Http/Middleware/HandleInertiaRequests.php

@@ -4,6 +4,8 @@
 
 namespace App\Http\Middleware;
 
+use App\Enums\PreferredLanguage;
+use App\Models\User;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\File;
 use Inertia\Inertia;
@@ -33,18 +35,21 @@ public function version(Request $request): ?string
      */
     public function share(Request $request): array
     {
-        $locale = app()->getLocale();
+        $user = $request->user();
+        $language = $user instanceof User ? ($user->preferred_language ?? PreferredLanguage::English) : PreferredLanguage::English;
+        $locale = $language->value;
 
         return [
             ...parent::share($request),
             'name' => config('app.name'),
             'auth' => [
-                'user' => $request->user(),
-                'subscribed' => $request->user()?->hasActiveSubscription() ?? false,
+                'user' => $user,
+                'subscribed' => $user?->hasActiveSubscription() ?? false,
             ],
             'enablePremiumUpgrades' => config('plate.enable_premium_upgrades'),
             'sidebarOpen' => ! $request->hasCookie('sidebar_state') || $request->cookie('sidebar_state') === 'true',
             'locale' => $locale,
+            'preferred_language' => $locale,
             'translations' => Inertia::once(fn (): array => $this->getTranslations($locale)),
         ];
     }

app/Http/Requests/UpdateUserRequest.php

@@ -4,6 +4,7 @@
 
 namespace App\Http\Requests;
 
+use App\Enums\PreferredLanguage;
 use App\Models\User;
 use Illuminate\Contracts\Validation\ValidationRule;
 use Illuminate\Foundation\Http\FormRequest;
@@ -30,6 +31,12 @@ public function rules(): array
                 'max:255',
                 Rule::unique(User::class)->ignore($user->id),
             ],
+
+            'preferred_language' => [
+                'nullable',
+                'string',
+                Rule::enum(PreferredLanguage::class),
+            ],
         ];
     }
 }

app/Models/User.php

@@ -5,6 +5,7 @@
 namespace App\Models;
 
 use App\DataObjects\UserSettingsData;
+use App\Enums\PreferredLanguage;
 use Carbon\CarbonInterface;
 use Database\Factories\UserFactory;
 use Illuminate\Contracts\Auth\MustVerifyEmail;
@@ -34,6 +35,7 @@
  * @property-read CarbonInterface $created_at
  * @property-read CarbonInterface $updated_at
  * @property-read bool|null $is_verified
+ * @property-read PreferredLanguage|null $preferred_language
  * @property array<string, mixed>|null $settings
  * @property-read UserSettingsData $notification_settings
  * @property-read UserProfile|null $profile
@@ -93,6 +95,7 @@ public function casts(): array
             'two_factor_recovery_codes' => 'string',
             'two_factor_confirmed_at' => 'datetime',
             'is_verified' => 'boolean',
+            'preferred_language' => PreferredLanguage::class,
             'settings' => 'array',
             'created_at' => 'datetime',
             'updated_at' => 'datetime',

database/migrations/2026_02_21_000000_add_preferred_language_to_users_table.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table): void {
+            $table->string('preferred_language', 10)->nullable();
+        });
+    }
+};

lang/en/common.php

@@ -828,14 +828,16 @@
     'user_profile' => [
         'title' => 'Profile settings',
         'heading' => 'Profile information',
-        'description' => 'Update your name and email address',
+        'description' => 'Update your name and email address and preferred language',
         'name_label' => 'Name',
         'name_placeholder' => 'Full name',
         'email_label' => 'Email address',
         'email_placeholder' => 'Email address',
         'email_unverified' => 'Your email address is unverified.',
         'resend_verification' => 'Click here to resend the verification email.',
         'verification_sent' => 'A new verification link has been sent to your email address.',
+        'language_label' => 'Preferred language',
+        'language_placeholder' => 'Select your preferred language',
         'save_button' => 'Save',
         'saved' => 'Saved',
     ],

lang/fr/common.php

@@ -827,14 +827,16 @@
     'user_profile' => [
         'title' => 'Paramètres du profil',
         'heading' => 'Informations du profil',
-        'description' => 'Mettez à jour votre nom et votre adresse e-mail',
+        'description' => 'Mettez à jour votre nom, votre adresse e-mail et votre langue préférée',
         'name_label' => 'Nom',
         'name_placeholder' => 'Nom complet',
         'email_label' => 'Adresse e-mail',
         'email_placeholder' => 'Adresse e-mail',
         'email_unverified' => 'Votre adresse e-mail n\'est pas vérifiée.',
         'resend_verification' => 'Cliquez ici pour renvoyer l\'e-mail de vérification.',
         'verification_sent' => 'Un nouveau lien de vérification a été envoyé à votre adresse e-mail.',
+        'language_label' => 'Langue préférée',
+        'language_placeholder' => 'Sélectionnez votre langue préférée',
         'save_button' => 'Enregistrer',
         'saved' => 'Enregistré',
     ],

lang/mn/common.php

@@ -828,14 +828,16 @@
     'user_profile' => [
         'title' => 'Профайлын тохиргоо',
         'heading' => 'Профайлын мэдээлэл',
-        'description' => 'Нэр болон имэйл хаягаа шинэчлэх',
+        'description' => 'Нэр, имэйл зэрэг мэдээллээ шинэчлэх',
         'name_label' => 'Нэр',
         'name_placeholder' => 'Бүтэн нэр',
         'email_label' => 'Имэйл хаяг',
         'email_placeholder' => 'Имэйл хаяг',
         'email_unverified' => 'Таны имэйл хаяг баталгаажаагүй байна.',
         'resend_verification' => 'Имэйл баталгаажуулах холбоос дахин илгээх бол энд дарна үү.',
         'verification_sent' => 'Имэйл баталгаажуулах шинэ холбоос таны имэйл хаяг руу илгээгдлээ.',
+        'language_label' => 'Хэл',
+        'language_placeholder' => 'Хэлээ сонгоно уу',
         'save_button' => 'Хадгалах',
         'saved' => 'Хадгалагдлаа',
     ],