Internationalization preparation

Creating own repo for locales

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "locale"]
+	path = locale
+	url = git@kumig.it:kumisystems/journeyjoker-locale.git

debian_setup.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
-apt install libpq-dev build-essential libpython3-dev postgis python3-pip python3-venv libgdal-dev wkhtmltopdf -y
+apt install libpq-dev build-essential libpython3-dev postgis python3-pip python3-venv libgdal-dev wkhtmltopdf gettext -y
 python3 -m venv venv
 source venv/bin/activate
-pip install -Ur requirements.txt
+pip install -Ur requirements.txt
+./manage.py 
+./manage.py compilemessages -i venv

frontend/fields.py

@@ -0,0 +1,23 @@
+from django.conf import settings
+from django.db import models
+
+from .validators import LanguageValidator
+
+class LanguageField(models.CharField):
+    default_validators = [LanguageValidator()]
+
+    def __init__(self, *args, **kwargs):
+        kwargs.setdefault("max_length", 16)
+        super().__init__(*args, **kwargs)
+
+    def pre_save(self, model_instance, add):
+        value = getattr(model_instance, self.attname, None)
+        if value:
+            value = value.lower()
+            if "_" in value:
+                lang, country = value.split("_")
+                value = "_".join([lang, country.upper()])
+            setattr(model_instance, self.attname, value)
+            return value
+        else:
+            return super().pre_save(model_instance, add)

frontend/models.py

@@ -5,6 +5,8 @@ from django.contrib.auth import get_user_model
 
 from localauth.models import ImageMixin
 
+from .fields import LanguageField
+
 from django_countries.fields import CountryField
 
 class ClassProperty(property):
@@ -19,7 +21,7 @@ class Testimonial(models.Model):
             MaxValueValidator(5),
             MinValueValidator(1)
         ])
-    language = models.CharField(max_length=12, choices=settings.LANGUAGES)
+    language = LanguageField()
     public = models.BooleanField(default=False)
 
 class InspirationRegion(models.Model):

frontend/templatetags/startswith.py

@@ -0,0 +1,7 @@
+from django import template
+
+register = template.Library()
+
+@register.filter
+def startswith(text, string):
+    return text.startswith(string)

frontend/urls.py

@@ -1,6 +1,6 @@
 from django.urls import path, include
 
-from .views import HomeView, DemoTemplateView, ImpressumView, PrivacyNoticeView, TOSView, InspirationsView
+from .views import HomeView, DemoTemplateView, ImpressumView, PrivacyNoticeView, TOSView, InspirationsView, LanguageChoiceView
 
 app_name = "frontend"
 
@@ -12,4 +12,5 @@ urlpatterns = [
     path('privacy/', PrivacyNoticeView.as_view(), name="privacy"),
     path('tos/', TOSView.as_view(), name="tos"),
     path('inspirations/', InspirationsView.as_view(), name="inspirations"),
+    path('api/setlang/<slug:code>/', LanguageChoiceView.as_view(), name="languagechoice"),
 ]

frontend/validators.py

@@ -0,0 +1,10 @@
+from django.core.exceptions import ValidationError
+from django.conf import settings
+from django.utils.translation import gettext_lazy as _
+
+class LanguageValidator:
+    def __call__(self, value):
+        for language, _ in settings.LANGUAGES:
+            if language.startswith(value):
+                return
+        raise ValidationError(_("This is not a valid language code supported by this project."), code='invalid', params={'value': value})

frontend/views.py

@@ -1,4 +1,7 @@
-from django.views.generic import TemplateView
+from django.views.generic import TemplateView, View
+from django.conf import settings
+from django.http.response import HttpResponse
+from django.contrib import messages
 
 class HomeView(TemplateView):
     template_name = "frontend/index.html"
@@ -19,4 +22,15 @@ class TOSView(TemplateView):
     template_name = "frontend/terms.html"
 
 class InspirationsView(TemplateView):
-    template_name = "frontend/inspirations.html"
+    template_name = "frontend/inspirations.html"
+
+class LanguageChoiceView(View):
+    def get(self, request, *args, **kwargs):
+        response = HttpResponse()
+        for language, _ in settings.LANGUAGES:
+            if language.startswith(kwargs["code"]):
+                response.set_cookie(settings.LANGUAGE_COOKIE_NAME, language)
+                if request.user.is_authenticated:
+                    request.user.language = language
+                    request.user.save()
+        return response

localauth/models.py

@@ -10,6 +10,8 @@ from polymorphic.models import PolymorphicModel
 
 from .helpers import profile_to_coords, upload_path
 
+from frontend.fields import LanguageField
+
 class UserManager(BaseUserManager):
     use_in_migrations = True
 
@@ -42,6 +44,7 @@ class User(AbstractBaseUser):
     date_joined = models.DateTimeField(default=timezone.now)
     last_login = models.DateTimeField(null=True)
     is_superuser = models.BooleanField(default=False)
+    language = LanguageField(max_length=16, default="de")
 
     objects = UserManager()
 

locale

@@ -0,0 +1 @@
+Subproject commit 9ec43f57ecfd9f4064873527f5df6e371ee429f3

static/frontend/js/language.js

@@ -1 +1,9 @@
-var language="DE";
+(function($) {
+    
+    "use strict";
+
+    $("#language").change(function() {
+        $.get("/api/setlang/" + $(this).val() + "/").done(function() { document.location.reload(); });
+    });
+
+})(jQuery);

templates/frontend/base.html

@@ -1,6 +1,7 @@
 {% load static %}
 {% load i18n %}
 {% load dbsetting %}
+{% load startswith %}
 <!doctype html>
 <html lang="en">
 <head>
@@ -116,9 +117,10 @@
                                             <li class="list-inline-item">
                                                 <div class="form-group language">
                                                     <span><i class="fa fa-angle-down"></i></span>
-                                                    <select class="form-control">
-                                                        <option>{% if request.LANGUAGE_CODE == "de" %}DE{% else %}EN{% endif %}</option>
-                                                        <option>{% if request.LANGUAGE_CODE == "de" %}EN{% else %}DE{% endif %}</option>
+                                                    <select name="language" id="language" class="form-control">
+                                                        {% get_current_language as LANGUAGE_CODE %}
+                                                        <option value="de" {% if LANGUAGE_CODE|lower|startswith:"de" %}selected{% endif %}>DE</option>
+                                                        <option value="en" {% if LANGUAGE_CODE|lower|startswith:"en" %}selected{% endif %}>EN</option>
                                                     </select>
                                                 </div><!-- end form-group -->
                                             </li>
@@ -358,6 +360,7 @@
     <script src="{% static "frontend/js/custom-owl.js" %}"></script>
     <script src="{% static "frontend/js/custom-date-picker.js" %}"></script>
     <script src="{% static "frontend/js/custom-video.js" %}"></script>
+    <script src="{% static "frontend/js/language.js" %}"></script>
 
     {% block "scripts" %}
     {% endblock %}

urlaubsauktion/settings.py

@@ -34,6 +34,7 @@ INSTALLED_APPS = [
 MIDDLEWARE = [
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.locale.LocaleMiddleware',
     'django.middleware.common.CommonMiddleware',
     'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
@@ -111,6 +112,15 @@ USE_L10N = True
 
 USE_TZ = True
 
+LOCALE_PATHS = [
+    BASE_DIR / "locale",
+]
+
+LANGUAGES = [
+    ('de', 'German'),
+    ('en', 'English')
+]
+
 
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/3.1/howto/static-files/