フォーク元 suwako/invidious-mod
144 行
3.6 KiB
Crystal
144 行
3.6 KiB
Crystal
class Video
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module HTTPParamConverter
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def self.from_rs(rs)
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HTTP::Params.parse(rs.read(String))
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end
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end
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module XMLConverter
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def self.from_rs(rs)
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XML.parse_html(rs.read(String))
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end
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end
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def initialize(id, info, html, updated, title, views, likes, dislikes, wilson_score)
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@id = id
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@info = info
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@html = html
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@updated = updated
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@title = title
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@views = views
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@likes = likes
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@dislikes = dislikes
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@wilson_score = wilson_score
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end
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def to_a
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return [@id, @info, @html, @updated, @title, @views, @likes, @dislikes, @wilson_score]
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end
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DB.mapping({
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id: String,
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info: {
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type: HTTP::Params,
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default: HTTP::Params.parse(""),
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converter: Video::HTTPParamConverter,
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},
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html: {
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type: XML::Node,
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default: XML.parse_html(""),
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converter: Video::XMLConverter,
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},
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updated: Time,
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title: String,
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views: Int64,
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likes: Int32,
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dislikes: Int32,
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wilson_score: Float64,
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})
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end
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# See http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
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def ci_lower_bound(pos, n)
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if n == 0
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return 0.0
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end
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# z value here represents a confidence level of 0.95
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z = 1.96
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phat = 1.0*pos/n
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return (phat + z*z/(2*n) - z * Math.sqrt((phat*(1 - phat) + z*z/(4*n))/n))/(1 + z*z/n)
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end
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def elapsed_text(elapsed)
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millis = elapsed.total_milliseconds
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return "#{millis.round(2)}ms" if millis >= 1
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"#{(millis * 1000).round(2)}µs"
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end
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def get_client(pool)
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while pool.empty?
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sleep rand(0..10).milliseconds
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end
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return pool.shift
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end
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def fetch_video(id, client)
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begin
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info = client.get("/get_video_info?video_id=#{id}&el=detailpage&ps=default&eurl=&gl=US&hl=en").body
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html = client.get("/watch?v=#{id}").body
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end
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html = XML.parse_html(html)
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info = HTTP::Params.parse(info)
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if info["reason"]?
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raise info["reason"]
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end
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title = info["title"]
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views = info["view_count"].to_i64
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likes = html.xpath_node(%q(//button[@title="I like this"]/span))
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likes = likes ? likes.content.delete(",").to_i : 1
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dislikes = html.xpath_node(%q(//button[@title="I dislike this"]/span))
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dislikes = dislikes ? dislikes.content.delete(",").to_i : 0
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wilson_score = ci_lower_bound(likes, likes + dislikes)
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video = Video.new(id, info, html, Time.now, title, views, likes, dislikes, wilson_score)
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return video
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end
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def get_video(id, client, db, refresh = true)
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if db.query_one?("SELECT EXISTS (SELECT true FROM videos WHERE id = $1)", id, as: Bool)
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video = db.query_one("SELECT * FROM videos WHERE id = $1", id, as: Video)
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# If record was last updated over an hour ago, refresh (expire param in response lasts for 6 hours)
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if refresh && Time.now - video.updated > 1.hours
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video = fetch_video(id, client)
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db.exec("UPDATE videos SET info = $2, html = $3, updated = $4,\
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title = $5, views = $6, likes = $7, dislikes = $8, wilson_score = $9 WHERE id = $1", video.to_a)
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end
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else
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video = fetch_video(id, client)
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db.exec("INSERT INTO videos VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)", video.to_a)
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end
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return video
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end
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def search(query, client)
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begin
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html = client.get("https://www.youtube.com/results?q=#{query}&sp=EgIQAVAU").body
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end
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html = XML.parse_html(html)
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html.xpath_nodes(%q(//ol[@class="item-section"]/li)).each do |item|
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root = item.xpath_node(%q(div[contains(@class,"yt-lockup-video")]/div))
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if root
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link = root.xpath_node(%q(div[contains(@class,"yt-lockup-thumbnail")]/a/@href))
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if link
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yield link.content.split("=")[1]
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end
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end
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end
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end
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