Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/finders/message_finder.rb

@@ -0,0 +1,50 @@
+class MessageFinder
+  def initialize(conversation, params)
+    @conversation = conversation
+    @params = params
+  end
+
+  def perform
+    current_messages
+  end
+
+  private
+
+  def conversation_messages
+    @conversation.messages.includes(:attachments, :sender, sender: { avatar_attachment: [:blob] })
+  end
+
+  def messages
+    return conversation_messages if @params[:filter_internal_messages].blank?
+
+    conversation_messages.where.not('private = ? OR message_type = ?', true, 2)
+  end
+
+  def current_messages
+    if @params[:after].present? && @params[:before].present?
+      messages_between(@params[:after].to_i, @params[:before].to_i)
+    elsif @params[:before].present?
+      messages_before(@params[:before].to_i)
+    elsif @params[:after].present?
+      messages_after(@params[:after].to_i)
+    else
+      messages_latest
+    end
+  end
+
+  def messages_after(after_id)
+    messages.reorder('created_at asc').where('id > ?', after_id).limit(100)
+  end
+
+  def messages_before(before_id)
+    messages.reorder('created_at desc').where('id < ?', before_id).limit(20).reverse
+  end
+
+  def messages_between(after_id, before_id)
+    messages.reorder('created_at asc').where('id >= ? AND id < ?', after_id, before_id).limit(1000)
+  end
+
+  def messages_latest
+    messages.reorder('created_at desc').limit(20).reverse
+  end
+end