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Playlist: Fix video continuation (100+ videos playlists)

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This commit is contained in:
Samantaz Fox 2021-03-20 22:12:06 +00:00
parent f99d62a2bc
commit 980f5f1299
1 changed files with 42 additions and 24 deletions
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66
src/invidious/playlists.cr
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@ -436,38 +436,56 @@ def fetch_playlist(plid, locale)
end
def get_playlist_videos(db, playlist, offset, locale = nil, continuation = nil)
# Show empy playlist if requested page is out of range
if offset >= playlist.video_count
return [] of PlaylistVideo
end
if playlist.is_a? InvidiousPlaylist
db.query_all("SELECT * FROM playlist_videos WHERE plid = $1 ORDER BY array_position($2, index) LIMIT 100 OFFSET $3", playlist.id, playlist.index, offset, as: PlaylistVideo)
db.query_all("SELECT * FROM playlist_videos WHERE plid = $1 ORDER BY array_position($2, index) LIMIT 100 OFFSET $3",
playlist.id, playlist.index, offset, as: PlaylistVideo)
else
fetch_playlist_videos(playlist.id, playlist.video_count, offset, locale, continuation)
if offset >= 100
# Normalize offset to match youtube's behavior (100 videos chunck per request)
offset = (offset / 100).to_i64 * 100_i64
ctoken = produce_playlist_continuation(playlist.id, offset)
initial_data = JSON.parse(request_youtube_api_browse(ctoken)).as_h
else
response = YT_POOL.client &.get("/playlist?list=#{playlist.id}&gl=US&hl=en")
initial_data = extract_initial_data(response.body)
end
if initial_data
return extract_playlist_videos(initial_data)
else
return [] of PlaylistVideo
end
end
end
def fetch_playlist_videos(plid, video_count, offset = 0, locale = nil, continuation = nil)
if continuation
response = YT_POOL.client &.get("/watch?v=#{continuation}&list=#{plid}&gl=US&hl=en")
initial_data = extract_initial_data(response.body)
offset = initial_data["currentVideoEndpoint"]?.try &.["watchEndpoint"]?.try &.["index"]?.try &.as_i64 || offset
end
response = YT_POOL.client &.get("/playlist?list=#{plid}&gl=US&hl=en")
initial_data = extract_initial_data(response.body)
return [] of PlaylistVideo if !initial_data
videos = extract_playlist_videos(initial_data)
until videos.empty? || videos[0].index == offset
videos.shift
end
return videos
end
def extract_playlist_videos(initial_data : Hash(String, JSON::Any))
videos = [] of PlaylistVideo
(initial_data["contents"]?.try &.["twoColumnBrowseResultsRenderer"]["tabs"].as_a.select(&.["tabRenderer"]["selected"]?.try &.as_bool)[0]["tabRenderer"]["content"]["sectionListRenderer"]["contents"][0]["itemSectionRenderer"]["contents"][0]["playlistVideoListRenderer"]["contents"].as_a ||
initial_data["response"]?.try &.["continuationContents"]["playlistVideoListContinuation"]["contents"].as_a).try &.each do |item|
if initial_data["contents"]?
tabs = initial_data["contents"]["twoColumnBrowseResultsRenderer"]["tabs"]
tabs_renderer = tabs.as_a.select(&.["tabRenderer"]["selected"]?.try &.as_bool)[0]["tabRenderer"]
if tabs_renderer["contents"]?
# Initial playlist data
list_renderer = tabs_renderer.["contents"]["sectionListRenderer"]["contents"][0]
item_renderer = list_renderer.["itemSectionRenderer"]["contents"][0]
contents = item_renderer.["playlistVideoListRenderer"]["contents"].as_a
else
# Continuation data
contents = initial_data["onResponseReceivedActions"][0]?
.try &.["appendContinuationItemsAction"]["continuationItems"].as_a
end
else
contents = initial_data["response"]?.try &.["continuationContents"]["playlistVideoListContinuation"]["contents"].as_a
end
contents.try &.each do |item|
if i = item["playlistVideoRenderer"]?
video_id = i["navigationEndpoint"]["watchEndpoint"]["videoId"].as_s
plid = i["navigationEndpoint"]["watchEndpoint"]["playlistId"].as_s