Adds a DjangoLoader for templates so they can be overriden with prefix {year}_template.html (#145)

Author: virogenesis

pyconbalkan/conference/middleware.py

@@ -1,10 +1,13 @@
+import threading
 from urllib.parse import urljoin
 
 from django.conf import settings
 from django.http import HttpResponseRedirect
 
 from pyconbalkan.conference.models import Conference
 
+context = threading.local()
+
 
 class ConferenceSelectionMiddleware:
     def __init__(self, get_response):
@@ -53,4 +56,12 @@ def __call__(self, request):
                 ), "/")
             )
 
+        # Please forgive me everyone, I couldn't find a better way of accessing the conference object globally.
+        # And I really didn't want to use django.contrib.sites.models.Site
+        # https://docs.djangoproject.com/en/2.1/ref/contrib/sites/#module-django.contrib.sites
+        # If anyone has any better idea how to accomplish this please make a pull request.
+        #
+        # Idea taken from: https://stackoverflow.com/a/27694861/548059
+
+        context.conference = request.conference
         return self.get_response(request)

pyconbalkan/core/loaders.py

@@ -0,0 +1,16 @@
+from os import path
+
+from django.template import TemplateDoesNotExist
+from django.template.loaders.app_directories import Loader
+
+from pyconbalkan.conference.middleware import context
+
+
+class PyconLoader(Loader):
+    def get_template(self, template_name, skip=None):
+        if not hasattr(context, "conference"):
+            raise TemplateDoesNotExist("Conference object not be found in context, skipping.")
+        template_basename = "{:d}_{}".format(context.conference.year, path.basename(template_name))
+        template_name = path.join(path.dirname(template_name), template_basename)
+
+        return super(PyconLoader, self).get_template(template_name, skip=None)

pyconbalkan/settings.py

@@ -87,8 +87,11 @@
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'DIRS': [],
-        'APP_DIRS': True,
         'OPTIONS': {
+            'loaders': [
+                'pyconbalkan.core.loaders.PyconLoader',
+                'django.template.loaders.app_directories.Loader',
+            ],
             'context_processors': [
                 'django.template.context_processors.debug',
                 'django.template.context_processors.request',