Progress on dms, code cleanup

Progress on dms, code cleanup

app/controllers/api/v1/chat_conversations/messages_controller.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+class Api::V1::ChatConversations::MessagesController < Api::BaseController
+  before_action -> { authorize_if_got_token! :read, :'read:chats' }
+  before_action -> { doorkeeper_authorize! :write, :'write:chats' }
+  
+  before_action :require_user!
+  before_action :set_chat_conversation
+  before_action :set_chat_messages
+
+  after_action :insert_pagination_headers, unless: -> { @chats.empty? }
+
+  def show
+    puts "tilly chat_message_conversations - 1: " + @chats.count.inspect
+    render json: @chats, each_serializer: REST::ChatMessageSerializer
+  end
+
+  private
+
+  def set_chat_conversation
+    @chat_conversation = ChatConversation.find(params[:id])
+  end
+
+  def set_chat_messages
+    @chats = cached_conversation_chats
+  end
+
+  def cached_conversation_chats
+    cache_collection conversation_chats, ChatMessage
+  end
+
+  def conversation_chats
+    chats = ChatMessage.where(
+      chat_conversation: @chat_conversation
+    ).paginate_by_id(
+      limit_param(DEFAULT_CHAT_CONVERSATION_MESSAGE_LIMIT),
+      params_slice(:max_id, :since_id, :min_id)
+    )
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, nil)
+  end
+
+  def pagination_params(core_params)
+    params.slice(:limit).permit(:limit).merge(core_params)
+  end
+
+  def next_path
+    api_v1_chat_conversations_message_url params[:id], pagination_params(since_id: pagination_since_id)
+  end
+
+  def pagination_since_id
+    @chats.first.id
+  end
+end