def exercise_handler(request, exercise):
"""
Display an exercise
"""
# Copy related videos (should be small), as we're going to tweak them
related_videos = [copy.copy(topicdata.NODE_CACHE["Video"].get(key, None)) for key in exercise["related_video_readable_ids"]]
videos_to_delete = []
for idx, video in enumerate(related_videos):
# Remove all videos that were not recognized or
# simply aren't on disk.
# Check on disk is relatively cheap, also executed infrequently
if not video or not topic_tools.is_video_on_disk(video["youtube_id"]):
videos_to_delete.append(idx)
continue
# Resolve the most related path
video["path"] = video["paths"][0] # default value
for path in video["paths"]:
if topic_tools.is_sibling({"path": path, "kind": "Video"}, exercise):
video["path"] = path
break
del video["paths"]
for idx in reversed(videos_to_delete):
del related_videos[idx]
context = {
"exercise": exercise,
"title": exercise["title"],
"exercise_template": "exercises/" + exercise["slug"] + ".html",
"related_videos": related_videos,
}
return context
def video_handler(request, video, prev=None, next=None):
video_exists = VideoFile.objects.filter(pk=video['youtube_id']).exists()
# If we detect that a video exists, but it's not on disk, then
# force the database to update. No race condition here for saving
# progress in a VideoLog: it is not dependent on VideoFile.
if not video_exists and topic_tools.is_video_on_disk(video['youtube_id']):
force_job("videoscan")
video_exists = True
if not video_exists:
if request.is_admin:
# TODO(bcipolli): add a link, with querystring args that auto-checks this video in the topic tree
messages.warning(
request,
_("This video was not found! You can download it by going to the Update page."
))
elif request.is_logged_in:
messages.warning(
request,
_("This video was not found! Please contact your teacher or an admin to have it downloaded."
))
elif not request.is_logged_in:
messages.warning(
request,
_("This video was not found! You must login as an admin/teacher to download the video."
))
context = {
"video": video,
"title": video["title"],
"video_exists": video_exists,
"prev": prev,
"next": next,
}
return context
def video_handler(request, video, prev=None, next=None):
video_exists = VideoFile.objects.filter(pk=video['youtube_id']).exists()
# If we detect that a video exists, but it's not on disk, then
# force the database to update. No race condition here for saving
# progress in a VideoLog: it is not dependent on VideoFile.
if not video_exists and topic_tools.is_video_on_disk(video['youtube_id']):
force_job("videoscan")
video_exists = True
if not video_exists:
if request.is_admin:
# TODO(bcipolli): add a link, with querystring args that auto-checks this video in the topic tree
messages.warning(request, _("This video was not found! You can download it by going to the Update page."))
elif request.is_logged_in:
messages.warning(request, _("This video was not found! Please contact your teacher or an admin to have it downloaded."))
elif not request.is_logged_in:
messages.warning(request, _("This video was not found! You must login as an admin/teacher to download the video."))
context = {
"video": video,
"title": video["title"],
"video_exists": video_exists,
"prev": prev,
"next": next,
}
return context
def exercise_handler(request, exercise):
"""
Display an exercise
"""
# Copy related videos (should be small), as we're going to tweak them
related_videos = [
copy.copy(topicdata.NODE_CACHE["Video"].get(key, None))
for key in exercise["related_video_readable_ids"]
]
videos_to_delete = []
for idx, video in enumerate(related_videos):
# Remove all videos that were not recognized or
# simply aren't on disk.
# Check on disk is relatively cheap, also executed infrequently
if not video or not topic_tools.is_video_on_disk(video["youtube_id"]):
videos_to_delete.append(idx)
continue
# Resolve the most related path
video["path"] = video["paths"][0] # default value
for path in video["paths"]:
if topic_tools.is_sibling({
"path": path,
"kind": "Video"
}, exercise):
video["path"] = path
break
del video["paths"]
for idx in reversed(videos_to_delete):
del related_videos[idx]
context = {
"exercise": exercise,
"title": exercise["title"],
"exercise_template": "exercises/" + exercise["slug"] + ".html",
"related_videos": related_videos,
}
return context