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Bountiful extractor changes

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- Add extract_text to simplify extraction of InnerTube texts
- Add helper extractor methods to reduce repetition in parsing InnerTube
- Change [] more than 2 blocks long to use #dig or #dig?
- Remove useless ?.try blocks for items that always exists
- Add (some) documentation to VideoRendererParser
pull/2228/head
syeopite 3 years ago
parent 142317c2be
commit ca9eb0d539
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1 changed files with 127 additions and 51 deletions
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178
src/invidious/helpers/extractors.cr
Unescape Escape View File

@ -32,24 +32,49 @@ private module Parsers
private def self.parse(item_contents, author_fallback)
video_id = item_contents["videoId"].as_s
title = item_contents["title"].try { |t| t["simpleText"]?.try &.as_s || t["runs"]?.try &.as_a.map(&.["text"].as_s).join("") } || ""
title = extract_text(item_contents["title"]) || ""
# Extract author information
author_info = item_contents["ownerText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
author = author_info.try &.["text"].as_s || author_fallback.name || ""
author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
if author_info = item_contents.dig?("ownerText", "runs")
author_info = author_info[0]
author = author_info["text"].as_s
author_id = HelperExtractors.get_browse_endpoint(author_info)
else
author = author_fallback.name || ""
author_id = author_fallback.id || ""
end
published = item_contents["publishedTimeText"]?.try &.["simpleText"]?.try { |t| decode_date(t.as_s) } || Time.local
view_count = item_contents["viewCountText"]?.try &.["simpleText"]?.try &.as_s.gsub(/\D+/, "").to_i64? || 0_i64
# For live videos (and possibly recently premiered videos) there is no published information.
# Instead, in its place is the amount of people currently watching. This behavior should be replicated
# on Invidious once all features of livestreams are supported. On an unrelated note, defaulting to the current
# time for publishing isn't a good idea.
published = item_contents["publishedTimeText"]?.try &.["simpleText"].try { |t| decode_date(t.as_s) } || Time.local
# Typically views are stored under a "simpleText" in the "viewCountText". However, for
# livestreams and premiered it is stored under a "runs" array: [{"text":123}, {"text": "watching"}]
# When view count is disabled the "viewCountText" is not present on InnerTube data.
# TODO change default value to nil and typical encoding type to tuple storing type (watchers, views, etc)
# and count
view_count = item_contents.dig?("viewCountText", "simpleText").try &.as_s.gsub(/\D+/, "").to_i64? || 0_i64
description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
length_seconds = item_contents["lengthText"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } ||
item_contents["thumbnailOverlays"]?.try &.as_a.find(&.["thumbnailOverlayTimeStatusRenderer"]?).try &.["thumbnailOverlayTimeStatusRenderer"]?
.try &.["text"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } || 0
# The length information *should* only always exist in "lengthText". However, the legacy Invidious code
# extracts from "thumbnailOverlays" when it doesn't. More testing is needed to see if this is
# actually needed
if length_container = item_contents["lengthText"]?
length_seconds = decode_length_seconds(length_container["simpleText"].as_s)
elsif length_container = item_contents["thumbnailOverlays"]?.try &.as_a.find(&.["thumbnailOverlayTimeStatusRenderer"]?)
length_seconds = extract_text(length_container["thumbnailOverlayTimeStatusRenderer"]["text"]).try { |t| decode_length_seconds(t) } || 0
else
length_seconds = 0
end
live_now = false
paid = false
premium = false
premiere_timestamp = item_contents["upcomingEventData"]?.try &.["startTime"]?.try { |t| Time.unix(t.as_s.to_i64) }
premiere_timestamp = item_contents.dig?("upcomingEventData", "startTime").try { |t| Time.unix(t.as_s.to_i64) }
item_contents["badges"]?.try &.as_a.each do |badge|
b = badge["metadataBadgeRenderer"]
@ -89,15 +114,17 @@ private module Parsers
end
private def self.parse(item_contents, author_fallback)
author = item_contents["title"]["simpleText"]?.try &.as_s || author_fallback.name || ""
author = extract_text(item_contents["title"]) || author_fallback.name || ""
author_id = item_contents["channelId"]?.try &.as_s || author_fallback.id || ""
author_thumbnail = item_contents["thumbnail"]["thumbnails"]?.try &.as_a[0]?.try &.["url"]?.try &.as_s || ""
subscriber_count = item_contents["subscriberCountText"]?.try &.["simpleText"]?.try &.as_s.try { |s| short_text_to_number(s.split(" ")[0]) } || 0
author_thumbnail = HelperExtractors.get_thumbnails(item_contents)
# When public subscriber count is disabled, the subscriberCountText isn't sent by InnerTube.
# TODO change default value to nil
subscriber_count = item_contents.dig?("subscriberCountText").try &.["simpleText"].try { |s| short_text_to_number(s.as_s.split(" ")[0]) } || 0
auto_generated = false
auto_generated = true if !item_contents["videoCountText"]?
video_count = item_contents["videoCountText"]?.try &.["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
auto_generated = !item_contents["videoCountText"]? ? true : false
video_count = HelperExtractors.get_video_count(item_contents)
description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
SearchChannel.new({
@ -120,11 +147,11 @@ private module Parsers
end
private def self.parse(item_contents, author_fallback)
title = item_contents["title"]["runs"].as_a[0]?.try &.["text"].as_s || ""
title = extract_text(item_contents["title"]) || ""
plid = item_contents["playlistId"]?.try &.as_s || ""
video_count = item_contents["videoCountText"]["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
playlist_thumbnail = item_contents["thumbnail"]["thumbnails"][0]?.try &.["url"]?.try &.as_s || ""
video_count = HelperExtractors.get_video_count(item_contents)
playlist_thumbnail = HelperExtractors.get_thumbnails(item_contents)
SearchPlaylist.new({
title: title,
@ -141,26 +168,26 @@ private module Parsers
module PlaylistRendererParser
def self.process(item : JSON::Any, author_fallback : AuthorFallback)
if item_contents = item["playlistRenderer"]?
return self.parse(item_contents, author_fallback)
return self.parse(item_contents)
end
end
private def self.parse(item_contents, author_fallback)
private def self.parse(item_contents)
title = item_contents["title"]["simpleText"]?.try &.as_s || ""
plid = item_contents["playlistId"]?.try &.as_s || ""
video_count = item_contents["videoCount"]?.try &.as_s.to_i || 0
playlist_thumbnail = item_contents["thumbnails"].as_a[0]?.try &.["thumbnails"]?.try &.as_a[0]?.try &.["url"].as_s || ""
video_count = HelperExtractors.get_video_count(item_contents)
playlist_thumbnail = HelperExtractors.get_thumbnails_plural(item_contents)
author_info = item_contents["shortBylineText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
author = author_info.try &.["text"].as_s || author_fallback.name || ""
author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
author_info = item_contents.dig("shortBylineText", "runs", 0)
author = author_info["text"].as_s
author_id = HelperExtractors.get_browse_endpoint(author_info)
videos = item_contents["videos"]?.try &.as_a.map do |v|
v = v["childVideoRenderer"]
v_title = v["title"]["simpleText"]?.try &.as_s || ""
v_title = v.dig?("title", "simpleText").try &.as_s || ""
v_id = v["videoId"]?.try &.as_s || ""
v_length_seconds = v["lengthText"]?.try &.["simpleText"]?.try { |t| decode_length_seconds(t.as_s) } || 0
v_length_seconds = v.dig?("lengthText", "simpleText").try { |t| decode_length_seconds(t.as_s) } || 0
SearchPlaylistVideo.new({
title: v_title,
id: v_id,
@ -190,20 +217,8 @@ private module Parsers
end
private def self.parse(item_contents, author_fallback)
# Title extraction is a bit complicated. There are two possible routes for it
# as well as times when the title attribute just isn't sent by YT.
title_container = item_contents["title"]? || ""
if !title_container.is_a? String
if title = title_container["simpleText"]?
title = title.as_s
else
title = title_container["runs"][0]["text"].as_s
end
else
title = ""
end
url = item_contents["endpoint"]?.try &.["commandMetadata"]["webCommandMetadata"]["url"].as_s
title = extract_text(item_contents["title"]?) || ""
url = item_contents["endpoint"]?.try &.dig("commandMetadata", "webCommandMetadata", "url").as_s
# Sometimes a category can have badges.
badges = [] of Tuple(String, String) # (Badge style, label)
@ -249,7 +264,6 @@ end
# the internal Youtube API's JSON response. The result is then packaged into
# a structure we can more easily use via the parsers above. Their internals are
# identical to the item parsers.
private module Extractors
module YouTubeTabs
def self.process(initial_data : Hash(String, JSON::Any))
@ -260,12 +274,10 @@ private module Extractors
private def self.extract(target)
raw_items = [] of JSON::Any
selected_tab = extract_selected_tab(target["tabs"])
content = selected_tab["content"]
content = extract_selected_tab(target["tabs"])["content"]
content["sectionListRenderer"]["contents"].as_a.each do |renderer_container|
renderer_container = renderer_container["itemSectionRenderer"]
renderer_container_contents = renderer_container["contents"].as_a[0]
renderer_container_contents = renderer_container["itemSectionRenderer"]["contents"].as_a[0]
# Category extraction
if items_container = renderer_container_contents["shelfRenderer"]?
@ -294,16 +306,14 @@ private module Extractors
private def self.extract(target)
raw_items = [] of Array(JSON::Any)
content = target["primaryContents"]
renderer = content["sectionListRenderer"]["contents"].as_a.each do |node|
target.dig("primaryContents", "sectionListRenderer", "contents").as_a.each do |node|
if node = node["itemSectionRenderer"]?
raw_items << node["contents"].as_a
end
end
raw_items = raw_items.flatten
return raw_items
return raw_items.flatten
end
end
@ -329,6 +339,72 @@ private module Extractors
end
end
# Helper methods to extract out certain stuff from InnerTube
private module HelperExtractors
# Retrieves the amount of videos present within the given InnerTube data.
#
# Returns a 0 when it's unable to do so
def self.get_video_count(container : JSON::Any) : Int32
if box = container["videoCountText"]?
return extract_text(container["videoCountText"]?).try &.gsub(/\D/, "").to_i || 0
elsif box = container["videoCount"]?
return box.as_s.to_i
else
return 0
end
end
# Retrieve lowest quality thumbnail from InnerTube data
#
# TODO allow configuration of image quality (-1 is highest)
#
# Raises when it's unable to parse from the given JSON data.
def self.get_thumbnails(container : JSON::Any) : String
return container.dig("thumbnail", "thumbnails", 0, "url").as_s
end
# ditto
# YouTube sometimes sends the thumbnail as:
# {"thumbnails": [{"thumbnails": [{"url": "example.com"}, ...]}]}
def self.get_thumbnails_plural(container : JSON::Any) : String
return container.dig("thumbnails", 0, "thumbnails", 0, "url").as_s
end
# Retrieves the ID required for querying the InnerTube browse endpoint
#
# Raises when it's unable to do so
def self.get_browse_endpoint(container)
return container.dig("navigationEndpoint", "browseEndpoint", "browseId").as_s
end
end
# Extracts text from InnerTube response
#
# InnerTube can package text in three different formats
# "runs": [
# {"text": "something"},
# {"text": "cont"},
# ...
# ]
#
# "SimpleText": "something"
#
# Or sometimes just none at all as with the data returned from
# category continuations.
def extract_text(item : JSON::Any?) : String?
if item.nil?
return nil
end
if text_container = item["simpleText"]?
return text_container.as_s
elsif text_container = item["runs"]?
return text_container.as_a.map(&.["text"].as_s).join("")
else
nil
end
end
# Parses an item from Youtube's JSON response into a more usable structure.
# The end result can either be a SearchVideo, SearchPlaylist or SearchChannel.
def extract_item(item : JSON::Any, author_fallback : String? = nil,

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