Add: #90 スタンプに対応していないと思われるサーバーの投稿からスタンプボタンを隠す設定 (#215)

app/models/instance_info.rb

@@ -14,4 +14,36 @@
 #
 
 class InstanceInfo < ApplicationRecord
+  EMOJI_REACTION_AVAILABLE_SOFTWARES = %w(
+    misskey
+    calckey
+    cherrypick
+    meisskey
+    firefish
+    renedon
+    fedibird
+    kmyblue
+    pleroma
+    akkoma
+  ).freeze
+
+  def self.emoji_reaction_available?(domain)
+    return Setting.enable_emoji_reaction if domain.nil?
+
+    Rails.cache.fetch("emoji_reaction_available_domain:#{domain}") { fetch_emoji_reaction_available(domain) }
+  end
+
+  def self.fetch_emoji_reaction_available(domain)
+    return Setting.enable_emoji_reaction if domain.nil?
+
+    info = InstanceInfo.find_by(domain: domain)
+    return false if info.nil?
+
+    return true if EMOJI_REACTION_AVAILABLE_SOFTWARES.include?(info['software'])
+
+    features = info.data.dig('metadata', 'features')
+    return false if features.nil? || !features.is_a?(Array)
+
+    features.include?('emoji_reaction')
+  end
 end