def invalidate_all_pages_related_to_video(video_id=None, video_slug=None):
"""Given a video file, recurse backwards up the hierarchy and invalidate all pages.
Also include video pages and related exercise pages.
"""
assert (video_id or video_slug) and not (video_id and video_slug), "One arg, not two"
# Expire all video files and related paths
video_paths = get_video_page_paths(video_id=video_id, video_slug=video_slug)
exercise_paths = get_exercise_page_paths(video_id=video_id, video_slug=video_slug)
leaf_paths = set(video_paths).union(set(exercise_paths))
for leaf_path in leaf_paths:
all_paths = generate_all_paths(path=leaf_path, base_path=topic_tools.get_topic_tree()['path'])
for path in filter(has_cache_key, all_paths): # start at the root
expire_page(path=path)
import json import os import settings from utils import topic_tools TOPICS = topic_tools.get_topic_tree() NODE_CACHE = topic_tools.get_node_cache() ID2SLUG_MAP = topic_tools.get_id2slug_map()
import json
import os
import settings
from utils import topic_tools
TOPICS = topic_tools.get_topic_tree()
NODE_CACHE = topic_tools.get_node_cache()
EXERCISE_TOPICS = topic_tools.get_exercise_topics()
ID2SLUG_MAP = topic_tools.get_id2slug_map()
LANGUAGE_LOOKUP = json.loads(
open(os.path.join(settings.DATA_PATH, "languages.json")).read())
LANGUAGE_LIST = json.loads(
open(os.path.join(settings.SUBTITLES_DATA_ROOT,
"listedlanguages.json")).read())
def generate_node_cache(topictree=None, output_dir=settings.DATA_PATH):
"""
Given the KA Lite topic tree, generate a dictionary of all Topic, Exercise, and Video nodes.
"""
if not topictree:
topictree = topic_tools.get_topic_tree(force=True)
node_cache = {}
def recurse_nodes(node, path="/"):
# Add the node to the node cache
kind = node["kind"]
node_cache[kind] = node_cache.get(kind, {})
if node["slug"] in node_cache[kind]:
# Existing node, so append the path to the set of paths
assert kind in topic_tools.multipath_kinds, "Make sure we expect to see multiple nodes map to the same slug (%s unexpected)" % kind
# Before adding, let's validate some basic properties of the
# stored node and the new node:
# 1. Compare the keys, and make sure that they overlap
# (except the stored node will not have 'path', but instead 'paths')
# 2. For string args, check that values are the same
# (most/all args are strings, and ... I feel we're already being darn
# careful here. So, I think it's enough.
node_shared_keys = set(node.keys()) - set(["path"])
stored_shared_keys = set(node_cache[kind][node["slug"]]) - set(
["paths"])
unshared_keys = node_shared_keys.symmetric_difference(
stored_shared_keys)
shared_keys = node_shared_keys.intersection(stored_shared_keys)
assert not unshared_keys, "Node and stored node should have all the same keys."
for key in shared_keys:
# A cursory check on values, for strings only (avoid unsafe types)
if isinstance(node[key], basestring):
assert node[key] == node_cache[kind][node["slug"]][key]
# We already added this node, it's just found at multiple paths.
# So, save the new path
node_cache[kind][node["slug"]]["paths"].append(node["path"])
else:
# New node, so copy off, massage, and store.
node_copy = copy.copy(node)
if "children" in node_copy:
del node_copy["children"]
if kind in topic_tools.multipath_kinds:
# If multiple paths can map to a single slug, need to store all paths.
node_copy["paths"] = [node_copy["path"]]
del node_copy["path"]
node_cache[kind][node["slug"]] = node_copy
# Do the recursion
for child in node.get("children", []):
assert "path" in node and "paths" not in node, "This code can't handle nodes with multiple paths; it just generates them!"
recurse_nodes(child, node["path"])
recurse_nodes(topictree)
with open(os.path.join(output_dir, topic_tools.node_cache_file),
"w") as fp:
fp.write(json.dumps(node_cache, indent=2))
return node_cache
def regenerate_all_pages_related_to_videos(video_ids):
"""Same as above, but on a list of videos"""
paths_to_regenerate = set() # unique set
for video_id in video_ids:
for video_path in get_video_page_paths(video_id=video_id):
paths_to_regenerate = paths_to_regenerate.union(generate_all_paths(path=video_path, base_path=topic_tools.get_topic_tree()['path'])) # start at the root
for exercise_path in get_exercise_page_paths(video_id=video_id):
paths_to_regenerate = paths_to_regenerate.union(generate_all_paths(path=exercise_path, base_path=topic_tools.get_topic_tree()['path'])) # start at the root
# Now, regenerate any page.
for path in paths_to_regenerate:
create_cache(path=path, force=True)
return paths_to_regenerate
def get_video_ids_for_topic(topic_id, topic_tree=None):
"""Nobody actually calls this, just for utility when using the shell."""
topic_tree = topic_tree or get_topic_tree()
return utils.videos.get_video_ids_for_topic(topic_id, topic_tree)
def generate_node_cache(topictree=None, output_dir=settings.DATA_PATH):
"""
Given the KA Lite topic tree, generate a dictionary of all Topic, Exercise, and Video nodes.
"""
if not topictree:
topictree = topic_tools.get_topic_tree(force=True)
node_cache = {}
def recurse_nodes(node, path="/"):
# Add the node to the node cache
kind = node["kind"]
node_cache[kind] = node_cache.get(kind, {})
if node["slug"] in node_cache[kind]:
# Existing node, so append the path to the set of paths
assert kind in topic_tools.multipath_kinds, "Make sure we expect to see multiple nodes map to the same slug (%s unexpected)" % kind
# Before adding, let's validate some basic properties of the
# stored node and the new node:
# 1. Compare the keys, and make sure that they overlap
# (except the stored node will not have 'path', but instead 'paths')
# 2. For string args, check that values are the same
# (most/all args are strings, and ... I feel we're already being darn
# careful here. So, I think it's enough.
node_shared_keys = set(node.keys()) - set(["path"])
stored_shared_keys = set(node_cache[kind][node["slug"]]) - set(["paths"])
unshared_keys = node_shared_keys.symmetric_difference(stored_shared_keys)
shared_keys = node_shared_keys.intersection(stored_shared_keys)
assert not unshared_keys, "Node and stored node should have all the same keys."
for key in shared_keys:
# A cursory check on values, for strings only (avoid unsafe types)
if isinstance(node[key], basestring):
assert node[key] == node_cache[kind][node["slug"]][key]
# We already added this node, it's just found at multiple paths.
# So, save the new path
node_cache[kind][node["slug"]]["paths"].append(node["path"])
else:
# New node, so copy off, massage, and store.
node_copy = copy.copy(node)
if "children" in node_copy:
del node_copy["children"]
if kind in topic_tools.multipath_kinds:
# If multiple paths can map to a single slug, need to store all paths.
node_copy["paths"] = [node_copy["path"]]
del node_copy["path"]
node_cache[kind][node["slug"]] = node_copy
# Do the recursion
for child in node.get("children", []):
assert "path" in node and "paths" not in node, "This code can't handle nodes with multiple paths; it just generates them!"
recurse_nodes(child, node["path"])
recurse_nodes(topictree)
with open(os.path.join(output_dir, topic_tools.node_cache_file), "w") as fp:
fp.write(json.dumps(node_cache, indent=2))
return node_cache