Gab Social. All are welcome.

app/models/concerns/account_finder_concern.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+module AccountFinderConcern
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def find_local!(username)
+      find_local(username) || raise(ActiveRecord::RecordNotFound)
+    end
+
+    def find_remote!(username, domain)
+      find_remote(username, domain) || raise(ActiveRecord::RecordNotFound)
+    end
+
+    def representative
+      find_local(Setting.site_contact_username.strip.gsub(/\A@/, '')) || Account.local.without_suspended.first
+    end
+
+    def find_local(username)
+      find_remote(username, nil)
+    end
+
+    def find_remote(username, domain)
+      AccountFinder.new(username, domain).account
+    end
+  end
+
+  class AccountFinder
+    attr_reader :username, :domain
+
+    def initialize(username, domain)
+      @username = username
+      @domain = domain
+    end
+
+    def account
+      scoped_accounts.order(id: :asc).take
+    end
+
+    private
+
+    def scoped_accounts
+      Account.unscoped.tap do |scope|
+        scope.merge! with_usernames
+        scope.merge! matching_username
+        scope.merge! matching_domain
+      end
+    end
+
+    def with_usernames
+      Account.where.not(username: '')
+    end
+
+    def matching_username
+      Account.where(Account.arel_table[:username].lower.eq username.to_s.downcase)
+    end
+
+    def matching_domain
+      if domain.nil?
+        Account.where(domain: nil)
+      else
+        Account.where(Account.arel_table[:domain].lower.eq domain.to_s.downcase)
+      end
+    end
+  end
+end