fix: Automatically remove expired story mention (#5300)

When a user mentions the connected Instagram page in a story, the story's content is downloaded in Chatwoot, then if the user deletes the story, the content persists in the platform.

fixes: #5258

app/models/attachment.rb

@@ -70,12 +70,15 @@ class Attachment < ApplicationRecord
   private
 
   def file_metadata
-    {
+    metadata = {
       extension: extension,
       data_url: file_url,
       thumb_url: thumb_url,
       file_size: file.byte_size
     }
+
+    metadata[:data_url] = metadata[:thumb_url] = external_url if message.instagram_story_mention?
+    metadata
   end
 
   def location_metadata

app/models/channel/facebook_page.rb

@@ -63,4 +63,21 @@ class Channel::FacebookPage < ApplicationRecord
     Rails.logger.debug { "Rescued: #{e.inspect}" }
     true
   end
+
+  # TODO: We will be removing this code after instagram_manage_insights is implemented
+  def fetch_instagram_story_link(message)
+    k = Koala::Facebook::API.new(page_access_token)
+    result = k.get_object(message.source_id, fields: %w[story]) || {}
+    story_link = result['story']['mention']['link']
+    # If the story is expired then it raises the ClientError and if the story is deleted with valid story-id it responses with nil
+    delete_instagram_story(message) if story_link.blank?
+    story_link
+  rescue Koala::Facebook::ClientError => e
+    delete_instagram_story(message)
+  end
+
+  def delete_instagram_story(message)
+    message.update(content: I18n.t('conversations.messages.instagram_deleted_story_content'), content_attributes: {})
+    message.attachments.destroy_all
+  end
 end

app/models/concerns/message_filter_helpers.rb

@@ -16,4 +16,8 @@ module MessageFilterHelpers
   def email_reply_summarizable?
     incoming? || outgoing? || input_csat?
   end
+
+  def instagram_story_mention?
+    inbox.instagram? && try(:content_attributes)[:image_type] == 'story_mention'
+  end
 end

app/models/inbox.rb

@@ -78,6 +78,10 @@ class Inbox < ApplicationRecord
     channel_type == 'Channel::FacebookPage'
   end
 
+  def instagram?
+    facebook? && channel.instagram_id.present?
+  end
+
   def web_widget?
     channel_type == 'Channel::WebWidget'
   end

app/models/message.rb

@@ -107,10 +107,20 @@ class Message < ApplicationRecord
       conversation: { assignee_id: conversation.assignee_id }
     )
     data.merge!(echo_id: echo_id) if echo_id.present?
+    validate_instagram_story if instagram_story_mention?
     data.merge!(attachments: attachments.map(&:push_event_data)) if attachments.present?
     merge_sender_attributes(data)
   end
 
+  # TODO: We will be removing this code after instagram_manage_insights is implemented
+  # Better logic is to listen to webhook and remove stories proactively rather than trying
+  # a fetch every time a message is returned
+  def validate_instagram_story
+    inbox.channel.fetch_instagram_story_link(self)
+    # we want to reload the message in case the story has expired and data got removed
+    reload
+  end
+
   def merge_sender_attributes(data)
     data.merge!(sender: sender.push_event_data) if sender && !sender.is_a?(AgentBot)
     data.merge!(sender: sender.push_event_data(inbox)) if sender.is_a?(AgentBot)