def splat_handler(request, splat):
slugs = filter(lambda x: x, splat.split("/"))
current_node = topicdata.TOPICS
seeking = "Topic" # search for topics, until we find videos or exercise
for slug in slugs:
# towards the end of the url, we switch from seeking a topic node
# to the particular type of node in the tree
for kind, kind_slug in topic_tools.kind_slugs.items():
if slug == kind_slug.split("/")[0]:
seeking = kind
break
# match each step in the topics hierarchy, with the url slug.
else:
children = [child for child in current_node['children'] if child['kind'] == seeking]
if not children:
raise Http404
match = None
prev = None
next = None
for child in children:
if match:
next = child
break
if child["slug"] == slug:
match = child
else:
prev = child
if not match:
raise Http404
current_node = match
if current_node["kind"] == "Topic":
return topic_handler(request, cached_nodes={"topic": current_node})
elif current_node["kind"] == "Video":
return video_handler(request, cached_nodes={"video": current_node, "prev": prev, "next": next})
elif current_node["kind"] == "Exercise":
cached_nodes = topic_tools.get_related_videos(current_node, limit_to_available=False)
cached_nodes["exercise"] = current_node
return exercise_handler(request, cached_nodes=cached_nodes)
else:
raise Http404
def refresh_topic_cache_wrapper_fn(request, cached_nodes={}, force=False, *args, **kwargs):
"""
Centralized logic for how to refresh the topic cache, for each type of object.
When the object is desired to be used, this code runs to refresh data,
balancing between correctness and efficiency.
"""
if not cached_nodes:
cached_nodes = {"topics": topicdata.TOPICS}
for node in cached_nodes.values():
if not node:
continue
has_children = bool(node.get("children"))
# Propertes not yet marked
if node["kind"] == "Video":
if force or "availability" not in node:
#stamp_availability_on_topic(node, force=force) # will be done by force below
recount_videos_and_invalidate_parents(get_parent(node), force=True, stamp_urls=True)
elif node["kind"] == "Exercise":
for video in topic_tools.get_related_videos(exercise=node).values():
if not "availability" in video:
stamp_availability_on_video(video, force=True) # will be done by force below
elif node["kind"] == "Topic":
bottom_layer_topic = "Topic" not in node["contains"]
# always run video_counts_need_update(), to make sure the (internal) counts stay up to date.
force = video_counts_need_update() or force or bottom_layer_topic
recount_videos_and_invalidate_parents(
node,
force=force,
stamp_urls=bottom_layer_topic,
)
kwargs.update(cached_nodes)
return handler(request, *args, **kwargs)
def splat_handler(request, splat):
slugs = filter(lambda x: x, splat.split("/"))
current_node = topicdata.TOPICS
while current_node:
match = [ch for ch in (current_node.get('children') or []) if request.path.startswith(ch["path"])]
if not match:
raise Http404
current_node = match[0]
if request.path == current_node["path"]:
break
if current_node["kind"] == "Topic":
return topic_handler(request, cached_nodes={"topic": current_node})
elif current_node["kind"] == "Video":
prev, next = get_neighbor_nodes(current_node, neighbor_kind=current_node["kind"])
return video_handler(request, cached_nodes={"video": current_node, "prev": prev, "next": next})
elif current_node["kind"] == "Exercise":
cached_nodes = topic_tools.get_related_videos(current_node, limit_to_available=False)
cached_nodes["exercise"] = current_node
cached_nodes["prev"], cached_nodes["next"] = get_neighbor_nodes(current_node, neighbor_kind=current_node['kind'])
return exercise_handler(request, cached_nodes=cached_nodes)
else:
raise Http404