generating language dropdown urls for nav with regex

gawa/start/templates/errors/400.html

@@ -1,15 +0,0 @@
-{% extends 'base.html' %}
-{% load i18n %}
-{% get_current_language as LANGUAGE_CODE %}
-{% block languagecode %}{{ LANGUAGE_CODE }}{% endblock languagecode %}
-{% block title %}{% translate "cscherr.de" %} - {% translate "startpage" %}{% endblock title %}
-{% block main %}
-<div class="jumbotron text-center">
-    <h1>400 {% translate "Bad request" %}</h1>
-    <p>{% translate "You sent bad data to the server." %}</p>
-</div>
-<div class="container text-center jumbotron my-5" py-5>
-    <h1 class="my-4">{% translate "Looking for anything specific?" %}</h1>
-    {% include 'main_search_form.html' %}
-</div>
-{% endblock main %}

gawa/start/templates/errors/403.html

@@ -1,15 +0,0 @@
-{% extends 'base.html' %}
-{% load i18n %}
-{% get_current_language as LANGUAGE_CODE %}
-{% block languagecode %}{{ LANGUAGE_CODE }}{% endblock languagecode %}
-{% block title %}{% translate "cscherr.de" %} - {% translate "startpage" %}{% endblock title %}
-{% block main %}
-<div class="jumbotron text-center">
-    <h1>403 {% translate "Permission denied" %}</h1>
-    <p>{% translate "You are not allowed to access this page." %}</p>
-</div>
-<div class="container text-center jumbotron my-5" py-5>
-    <h1 class="my-4">{% translate "Looking for anything specific?" %}</h1>
-    {% include 'main_search_form.html' %}
-</div>
-{% endblock main %}

gawa/start/templates/errors/404.html

@@ -1,15 +0,0 @@
-{% extends 'base.html' %}
-{% load i18n %}
-{% get_current_language as LANGUAGE_CODE %}
-{% block languagecode %}{{ LANGUAGE_CODE }}{% endblock languagecode %}
-{% block title %}{% translate "cscherr.de" %} - {% translate "startpage" %}{% endblock title %}
-{% block main %}
-<div class="jumbotron text-center">
-    <h1>404 {% translate "Not found" %}</h1>
-    <p>{% translate "The resource you are looking for does not exist." %}</p>
-</div>
-<div class="container text-center jumbotron my-5" py-5>
-    <h1 class="my-4">{% translate "Looking for anything specific?" %}</h1>
-    {% include 'main_search_form.html' %}
-</div>
-{% endblock main %}

gawa/start/templates/errors/500.html

@@ -1,15 +0,0 @@
-{% extends 'base.html' %}
-{% load i18n %}
-{% get_current_language as LANGUAGE_CODE %}
-{% block languagecode %}{{ LANGUAGE_CODE }}{% endblock languagecode %}
-{% block title %}{% translate "cscherr.de" %} - {% translate "startpage" %}{% endblock title %}
-{% block main %}
-<div class="jumbotron text-center">
-    <h1>500 {% translate "Internal Server Error" %}</h1>
-    <p>{% translate "Something went wrong." %}</p>
-</div>
-<div class="container text-center jumbotron my-5" py-5>
-    <h1 class="my-4">{% translate "Looking for anything specific?" %}</h1>
-    {% include 'main_search_form.html' %}
-</div>
-{% endblock main %}

gawa/start/templates/nav.html

@@ -51,7 +51,7 @@
                     <ul class="dropdown-menu">
                         {% for lang_code, lang_name in languages %}
                         <li><a class="dropdown-item" 
-                               href="{{ request.scheme }}://{{ request.META.HTTP_HOST }}{% change_lang lang_code %}?{{ request.GET.urlencode }}">
+                               href="{% change_lang lang_code %}">
                                 {{ lang_name }}</a></li>
                         {% endfor %}
                         <li><hr class="dropdown-divider"></li>

gawa/start/templatetags/helper_tags.py

@@ -2,11 +2,16 @@ from django.template import Library
 from django.urls import resolve, reverse
 from django.utils.translation import activate, get_language
 
+import re
+
+import logging
+logger = logging.getLogger(__name__)
+
 register = Library()
 
 
 @register.simple_tag(takes_context=True)
-def change_lang(context, lang=None, *args, **kwargs):
+def change_lang(context, lang="de", *args, **kwargs):
     """
     Get active page's url by a specified language
     Usage: {% change_lang 'en' %}
@@ -15,16 +20,18 @@ def change_lang(context, lang=None, *args, **kwargs):
     https://stackoverflow.com/a/41147772
     """
 
-    path = context['request'].path
+    path = context['request'].get_raw_uri()
-    url_parts = resolve(path)
+    logger.debug(f"requestdir: {dir(context['request'])}")
-
     url = path
-    cur_language = get_language()
     try:
-        activate(lang)
+        cur_lang: str = get_language()
-        url = reverse(url_parts.view_name, kwargs=url_parts.kwargs)
+        url = re.sub(f"/{cur_lang}/", f"/{lang}/", url)
-    finally:
-        activate(cur_language)
 
+    except Exception as e:
+        logger.error(f"exception while building language switcher form: {e}")
+        logger.debug(f"this is the context: {context}")
+
+    finally:
+        activate(lang)
         return "%s" % url