fix: strip markdown hard-break backslashes from webhook payloads (#13950)

app/models/concerns/push_data_helper.rb

@@ -10,6 +10,6 @@ module PushDataHelper
   end
 
   def webhook_data
-    Conversations::EventDataPresenter.new(self).push_data
+    Conversations::EventDataPresenter.new(self).webhook_data
   end
 end

app/models/message.rb

@@ -170,6 +170,13 @@ class Message < ApplicationRecord
     data
   end
 
+  def webhook_push_event_data
+    push_event_data.merge(
+      content: Messages::WebhookContentNormalizer.normalize(content),
+      processed_message_content: Messages::WebhookContentNormalizer.normalize(processed_message_content)
+    )
+  end
+
   def webhook_data
     data = {
       account: account.webhook_data,

app/presenters/conversations/event_data_presenter.rb

@@ -21,12 +21,21 @@ class Conversations::EventDataPresenter < SimpleDelegator
     }
   end
 
+  # Like #push_data but with message text normalized for external integrations (webhooks).
+  def webhook_data
+    push_data.merge(messages: webhook_push_messages)
+  end
+
   private
 
   def push_messages
     [messages.where(account_id: account_id).chat.last&.push_event_data].compact
   end
 
+  def webhook_push_messages
+    [messages.where(account_id: account_id).chat.last&.webhook_push_event_data].compact
+  end
+
   def push_meta
     {
       sender: contact.push_event_data,

app/presenters/message_content_presenter.rb

@@ -8,7 +8,7 @@ class MessageContentPresenter < SimpleDelegator
   end
 
   def webhook_content
-    content_with_survey_link
+    Messages::WebhookContentNormalizer.normalize(content_with_survey_link)
   end
 
   private

app/services/messages/webhook_content_normalizer.rb

@@ -0,0 +1,10 @@
+# Strips CommonMark hard line breaks from stored markdown source (backslash before newline).
+# ProseMirror / the dashboard editor emits this form so soft breaks survive as markdown;
+# webhook consumers expect plain newlines without a visible backslash (e.g. WhatsApp gateways).
+class Messages::WebhookContentNormalizer
+  def self.normalize(text)
+    return text if text.blank?
+
+    text.gsub(/\\\r?\n/, "\n")
+  end
+end