User: Add support for importing Youtube watch history (#4171)

src/invidious/routes/preferences.cr

@@ -319,6 +319,15 @@ module Invidious::Routes::PreferencesRoute
               response: error_template(415, "Invalid playlist file uploaded")
             )
           end
+        when "import_youtube_wh"
+          filename = part.filename || ""
+          success = Invidious::User::Import.from_youtube_wh(user, body, filename, type)
+
+          if !success
+            haltf(env, status_code: 415,
+              response: error_template(415, "Invalid watch history file uploaded")
+            )
+          end
         when "import_freetube"
           Invidious::User::Import.from_freetube(user, body)
         when "import_newpipe_subscriptions"

src/invidious/user/imports.cr

@@ -218,6 +218,26 @@ struct Invidious::User
       end
     end
 
+    def from_youtube_wh(user : User, body : String, filename : String, type : String) : Bool
+      extension = filename.split(".").last
+
+      if extension == "json" || type == "application/json"
+        data = JSON.parse(body)
+        watched = data.as_a.compact_map do |item|
+          next unless url = item["titleUrl"]?
+          next unless match = url.as_s.match(/\?v=(?<video_id>[a-zA-Z0-9_-]+)$/)
+          match["video_id"]
+        end
+        watched.reverse! # YouTube have newest first
+        user.watched += watched
+        user.watched.uniq!
+        Invidious::Database::Users.update_watch_history(user)
+        return true
+      else
+        return false
+      end
+    end
+
     # -------------------
     #  Freetube
     # -------------------

src/invidious/views/user/data_control.ecr

@@ -26,6 +26,11 @@
                 <input type="file" id="import_youtube_pl" name="import_youtube_pl">
             </div>
 
+            <div class="pure-control-group">
+                <label for="import_youtube_wh"><%= translate(locale, "Import YouTube watch history (.json)") %></label>
+                <input type="file" id="import_youtube_wh" name="import_youtube_wh">
+            </div>
+
             <div class="pure-control-group">
                 <label for="import_freetube"><%= translate(locale, "Import FreeTube subscriptions (.db)") %></label>
                 <input type="file" id="import_freetube" name="import_freetube">