chore: Refactor the notification service for participants (#6461)

app/services/messages/mention_service.rb

@@ -0,0 +1,41 @@
+class Messages::MentionService
+  pattr_initialize [:message!]
+
+  def perform
+    return unless valid_mention_message?(message)
+
+    validated_mentioned_ids = filter_mentioned_ids_by_inbox
+    return if validated_mentioned_ids.blank?
+
+    Conversations::UserMentionJob.perform_later(validated_mentioned_ids, message.conversation.id, message.account.id)
+    generate_notifications_for_mentions(validated_mentioned_ids)
+  end
+
+  private
+
+  def valid_mention_message?(message)
+    message.private? && message.content.present? && mentioned_ids.present?
+  end
+
+  def mentioned_ids
+    @mentioned_ids ||= message.content.scan(%r{\(mention://(user|team)/(\d+)/(.+?)\)}).map(&:second).uniq
+  end
+
+  def filter_mentioned_ids_by_inbox
+    inbox = message.inbox
+    valid_mentionable_ids = inbox.account.administrators.map(&:id) + inbox.members.map(&:id)
+    # Intersection of ids
+    mentioned_ids & valid_mentionable_ids.uniq.map(&:to_s)
+  end
+
+  def generate_notifications_for_mentions(validated_mentioned_ids)
+    validated_mentioned_ids.each do |user_id|
+      NotificationBuilder.new(
+        notification_type: 'conversation_mention',
+        user: User.find(user_id),
+        account: message.account,
+        primary_actor: message
+      ).perform
+    end
+  end
+end

app/services/messages/new_message_notification_service.rb

@@ -0,0 +1,25 @@
+class Messages::NewMessageNotificationService
+  pattr_initialize [:message!]
+
+  def perform
+    return unless message.notifiable?
+
+    notify_conversation_assignee
+  end
+
+  private
+
+  delegate :conversation, :sender, :account, to: :message
+
+  def notify_conversation_assignee
+    return if conversation.assignee.blank?
+    return if conversation.assignee == sender
+
+    NotificationBuilder.new(
+      notification_type: 'assigned_conversation_new_message',
+      user: conversation.assignee,
+      account: account,
+      primary_actor: message
+    ).perform
+  end
+end