rename map history files to be less confusing

src/c3nav/mapdata/cache.py

@@ -59,7 +59,7 @@ class MapHistory:
 
     @staticmethod
     def level_filename(level_id, mode):
-        return os.path.join(settings.CACHE_ROOT, 'level_%s_%d' % (mode, level_id))
+        return os.path.join(settings.CACHE_ROOT, 'level_%d_history_%s' % (level_id, mode))
 
     @classmethod
     def open_level(cls, level_id, mode, default_update=None):

src/c3nav/mapdata/render/data.py

@@ -315,7 +315,7 @@ class LevelRenderData:
 
             level.render_data = pickle.dumps(render_data)
 
-            map_history.save(MapHistory.level_filename(level.pk, 'render'))
+            map_history.save(MapHistory.level_filename(level.pk, 'composite'))
 
         with transaction.atomic():
             for level in levels:

src/c3nav/mapdata/render/renderer.py

@@ -35,8 +35,8 @@ class MapRenderer:
 
     @cached_property
     def last_update(self):
-        return MapHistory.open_level_cached(self.level, 'render').last_update(self.minx, self.miny,
-                                                                              self.maxx, self.maxy)
+        return MapHistory.open_level_cached(self.level, 'composite').last_update(self.minx, self.miny,
+                                                                                 self.maxx, self.maxy)
 
     @cached_property
     def update_cache_key(self):

src/c3nav/mapdata/views.py

@@ -127,7 +127,7 @@ def history(request, level, mode, format):
         raise PermissionDenied
     level = get_object_or_404(Level, pk=level)
 
-    if mode == 'render' and level.on_top_of_id is not None:
+    if mode == 'composite' and level.on_top_of_id is not None:
         raise Http404
 
     history = MapHistory.open_level(level.pk, mode)