Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/jobs/webhooks/line_events_job.rb

@@ -0,0 +1,24 @@
+class Webhooks::LineEventsJob < ApplicationJob
+  queue_as :default
+
+  def perform(params: {}, signature: '', post_body: '')
+    @params = params
+    return unless valid_event_payload?
+    return unless valid_post_body?(post_body, signature)
+
+    Line::IncomingMessageService.new(inbox: @channel.inbox, params: @params['line'].with_indifferent_access).perform
+  end
+
+  private
+
+  def valid_event_payload?
+    @channel = Channel::Line.find_by(line_channel_id: @params[:line_channel_id]) if @params[:line_channel_id]
+  end
+
+  # https://developers.line.biz/en/reference/messaging-api/#signature-validation
+  # validate the line payload
+  def valid_post_body?(post_body, signature)
+    hash = OpenSSL::HMAC.digest(OpenSSL::Digest.new('SHA256'), @channel.line_channel_secret, post_body)
+    Base64.strict_encode64(hash) == signature
+  end
+end