Fix: すでに同じカスタム絵文字が存在する場合、スタンプを受け入れない問題

app/lib/activitypub/activity/like.rb

@@ -93,15 +93,17 @@ class ActivityPub::Activity::Like < ActivityPub::Activity
 
     return if custom_emoji_parser.shortcode.blank? || custom_emoji_parser.image_remote_url.blank?
 
-    emoji = CustomEmoji.find_by(shortcode: custom_emoji_parser.shortcode, domain: @account.domain)
-
-    return unless emoji.nil? || custom_emoji_parser.image_remote_url != emoji.image_remote_url || (custom_emoji_parser.updated_at && custom_emoji_parser.updated_at >= emoji.updated_at)
-
-    domain = emoji_tag['domain'] || URI.split(custom_emoji_parser.uri)[2] || @account.domain
+    domain = tag['domain'] || URI.split(custom_emoji_parser.uri)[2] || @account.domain
     domain = nil if domain == Rails.configuration.x.local_domain || domain == Rails.configuration.x.web_domain
-
     return if domain.present? && skip_download?(domain)
 
+    emoji = CustomEmoji.find_by(shortcode: custom_emoji_parser.shortcode, domain: domain)
+
+    return emoji unless emoji.nil? ||
+                        custom_emoji_parser.image_remote_url != emoji.image_remote_url ||
+                        (custom_emoji_parser.updated_at && custom_emoji_parser.updated_at >= emoji.updated_at) ||
+                        custom_emoji_parser.license != emoji.license
+
     begin
       emoji ||= CustomEmoji.new(
         domain: domain,

spec/lib/activitypub/activity/like_spec.rb

@@ -93,6 +93,35 @@ RSpec.describe ActivityPub::Activity::Like do
       end
     end
 
+    context 'with custom emoji but that is existing on local server' do
+      let(:content) { ':tinking:' }
+      let(:tag) do
+        {
+          id: 'https://example.com/aaa',
+          type: 'Emoji',
+          icon: {
+            url: 'http://example.com/emoji.png',
+          },
+          name: 'tinking',
+          license: 'Everyone but Ohagi',
+        }
+      end
+
+      before do
+        Fabricate(:custom_emoji, domain: 'example.com', uri: 'https://example.com/aaa', image_remote_url: 'http://example.com/emoji.png', shortcode: 'tinking', license: 'Everyone but Ohagi')
+      end
+
+      it 'create emoji reaction' do
+        expect(subject.count).to eq 1
+        expect(subject.first.name).to eq 'tinking'
+        expect(subject.first.account).to eq sender
+        expect(subject.first.custom_emoji).to_not be_nil
+        expect(subject.first.custom_emoji.shortcode).to eq 'tinking'
+        expect(subject.first.custom_emoji.domain).to eq 'example.com'
+        expect(sender.favourited?(status)).to be false
+      end
+    end
+
     context 'with custom emoji and custom domain' do
       let(:content) { ':tinking:' }
       let(:tag) do