fix: Handle Facebook reel attachment type (#13691)

Fixes https://linear.app/chatwoot/issue/PLA-96/argumenterror-reel-is-not-a-valid-file-type-argumenterror
Fixes a crash in `when a user shares a Facebook reel via Messenger.
Facebook sends these attachments with `type: "reel"`, which isn't a
valid `file_type` enum value on the Attachment model (only `ig_reel`
exists, matching Instagram's format).

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/builders/messages/messenger/message_builder.rb

@@ -2,12 +2,17 @@ class Messages::Messenger::MessageBuilder
   include ::FileTypeHelper
 
   def process_attachment(attachment)
-    # This check handles very rare case if there are multiple files to attach with only one usupported file
+    # This check handles very rare case if there are multiple files to attach with only one unsupported file
     return if unsupported_file_type?(attachment['type'])
 
-    attachment_obj = @message.attachments.new(attachment_params(attachment).except(:remote_file_url))
+    params = attachment_params(attachment)
+    attachment_obj = @message.attachments.new(params.except(:remote_file_url))
     attachment_obj.save!
-    attach_file(attachment_obj, attachment_params(attachment)[:remote_file_url]) if attachment_params(attachment)[:remote_file_url]
+    if facebook_reel?(attachment)
+      update_facebook_reel_content(attachment)
+    elsif params[:remote_file_url]
+      attach_file(attachment_obj, params[:remote_file_url])
+    end
     fetch_story_link(attachment_obj) if attachment_obj.file_type == 'story_mention'
     fetch_ig_story_link(attachment_obj) if attachment_obj.file_type == 'ig_story'
     fetch_ig_post_link(attachment_obj) if attachment_obj.file_type == 'ig_post'
@@ -26,7 +31,7 @@ class Messages::Messenger::MessageBuilder
   end
 
   def attachment_params(attachment)
-    file_type = attachment['type'].to_sym
+    file_type = normalize_file_type(attachment['type'])
     params = { file_type: file_type, account_id: @message.account_id }
 
     if [:image, :file, :audio, :video, :share, :story_mention, :ig_reel, :ig_post, :ig_story].include? file_type
@@ -100,6 +105,28 @@ class Messages::Messenger::MessageBuilder
 
   private
 
+  # Facebook may send attachment types that don't directly match our file_type enum.
+  # Map known aliases to their canonical enum values.
+  FACEBOOK_FILE_TYPE_MAP = { reel: :ig_reel }.freeze
+
+  def normalize_file_type(type)
+    sym = type.to_sym
+    FACEBOOK_FILE_TYPE_MAP.fetch(sym, sym)
+  end
+
+  # Facebook sends reel URLs as webpage links (facebook.com/reel/...) rather than
+  # direct video URLs. Downloading these yields HTML, not video content.
+  def facebook_reel?(attachment)
+    attachment['type'].to_sym == :reel
+  end
+
+  def update_facebook_reel_content(attachment)
+    url = attachment.dig('payload', 'url')
+    return if url.blank?
+
+    @message.update!(content: url) if @message.content.blank?
+  end
+
   def unsupported_file_type?(attachment_type)
     [:template, :unsupported_type, :ephemeral].include? attachment_type.to_sym
   end

app/models/attachment.rb

@@ -89,7 +89,7 @@ class Attachment < ApplicationRecord
     when :embed
       embed_data
     else
-      file_metadata
+      file.attached? ? file_metadata : { data_url: external_url, thumb_url: '' }
     end
   end