API: Add endpoints for import/export (#3617)

src/invidious/routes/api/v1/authenticated.cr

@@ -31,6 +31,29 @@ module Invidious::Routes::API::V1::Authenticated
     env.response.status_code = 204
   end
 
+  def self.export_invidious(env)
+    env.response.content_type = "application/json"
+    user = env.get("user").as(User)
+
+    return Invidious::User::Export.to_invidious(user)
+  end
+
+  def self.import_invidious(env)
+    user = env.get("user").as(User)
+
+    begin
+      if body = env.request.body
+        body = env.request.body.not_nil!.gets_to_end
+      else
+        body = "{}"
+      end
+      Invidious::User::Import.from_invidious(user, body)
+    rescue
+    end
+
+    env.response.status_code = 204
+  end
+
   def self.feed(env)
     env.response.content_type = "application/json"
 

src/invidious/routes/subscriptions.cr

@@ -104,33 +104,8 @@ module Invidious::Routes::Subscriptions
       if format == "json"
         env.response.content_type = "application/json"
         env.response.headers["content-disposition"] = "attachment"
-        playlists = Invidious::Database::Playlists.select_like_iv(user.email)
 
-        return JSON.build do |json|
-          json.object do
-            json.field "subscriptions", user.subscriptions
-            json.field "watch_history", user.watched
-            json.field "preferences", user.preferences
-            json.field "playlists" do
-              json.array do
-                playlists.each do |playlist|
-                  json.object do
-                    json.field "title", playlist.title
-                    json.field "description", html_to_content(playlist.description_html)
-                    json.field "privacy", playlist.privacy.to_s
-                    json.field "videos" do
-                      json.array do
-                        Invidious::Database::PlaylistVideos.select_ids(playlist.id, playlist.index, limit: 500).each do |video_id|
-                          json.string video_id
-                        end
-                      end
-                    end
-                  end
-                end
-              end
-            end
-          end
-        end
+        return Invidious::User::Export.to_invidious(user)
       else
         env.response.content_type = "application/xml"
         env.response.headers["content-disposition"] = "attachment"

src/invidious/routing.cr

@@ -254,6 +254,9 @@ module Invidious::Routing
       get "/api/v1/auth/preferences", {{namespace}}::Authenticated, :get_preferences
       post "/api/v1/auth/preferences", {{namespace}}::Authenticated, :set_preferences
 
+      get "/api/v1/auth/export/invidious", {{namespace}}::Authenticated, :export_invidious
+      post "/api/v1/auth/import/invidious", {{namespace}}::Authenticated, :import_invidious
+
       get "/api/v1/auth/feed", {{namespace}}::Authenticated, :feed
 
       get "/api/v1/auth/subscriptions", {{namespace}}::Authenticated, :get_subscriptions

src/invidious/user/exports.cr

@@ -0,0 +1,35 @@
+struct Invidious::User
+  module Export
+    extend self
+
+    def to_invidious(user : User)
+      playlists = Invidious::Database::Playlists.select_like_iv(user.email)
+
+      return JSON.build do |json|
+        json.object do
+          json.field "subscriptions", user.subscriptions
+          json.field "watch_history", user.watched
+          json.field "preferences", user.preferences
+          json.field "playlists" do
+            json.array do
+              playlists.each do |playlist|
+                json.object do
+                  json.field "title", playlist.title
+                  json.field "description", html_to_content(playlist.description_html)
+                  json.field "privacy", playlist.privacy.to_s
+                  json.field "videos" do
+                    json.array do
+                      Invidious::Database::PlaylistVideos.select_ids(playlist.id, playlist.index, limit: CONFIG.playlist_length_limit).each do |video_id|
+                        json.string video_id
+                      end
+                    end
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end # module
+end