Rename lazyYT plugin directory name to lazy-yt

plugins/lazy-yt/plugin.rb

@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+# name: lazyYT
+# about: Uses the lazyYT plugin to lazy load Youtube videos
+# version: 1.0.1
+# authors: Arpit Jalan
+# url: https://github.com/discourse/discourse/tree/master/plugins/lazy-yt
+
+hide_plugin if self.respond_to?(:hide_plugin)
+
+# javascript
+register_asset "javascripts/lazyYT.js"
+
+# stylesheet
+register_asset "stylesheets/lazyYT.css"
+register_asset "stylesheets/lazyYT_mobile.scss", :mobile
+
+# freedom patch YouTube Onebox
+class Onebox::Engine::YoutubeOnebox
+  include Onebox::Engine
+  alias_method :yt_onebox_to_html, :to_html
+
+  def to_html
+    if video_id && !params['list']
+      video_width = (params['width'] && params['width'].to_i <= 695) ? params['width'] : 480 # embed width
+      video_height = (params['height'] && params['height'].to_i <= 500) ? params['height'] : 270 # embed height
+
+      # Put in the LazyYT div instead of the iframe
+      escaped_title = ERB::Util.html_escape(video_title)
+      "<div class=\"lazyYT\" data-youtube-id=\"#{video_id}\" data-youtube-title=\"#{escaped_title}\" data-width=\"#{video_width}\" data-height=\"#{video_height}\" data-parameters=\"#{embed_params}\"></div>"
+    else
+      yt_onebox_to_html
+    end
+  end
+
+end
+
+after_initialize do
+
+  on(:reduce_cooked) do |fragment|
+    fragment.css(".lazyYT").each do |yt|
+      begin
+        youtube_id = yt["data-youtube-id"]
+        parameters = yt["data-parameters"]
+        uri = URI("https://www.youtube.com/embed/#{youtube_id}?autoplay=1&#{parameters}")
+        yt.replace %{<p><a href="#{uri.to_s}">https://#{uri.host}#{uri.path}</a></p>}
+      rescue URI::InvalidURIError
+        # remove any invalid/weird URIs
+        yt.remove
+      end
+    end
+  end
+
+end