Make transcript generation object-oriented

lib/discourse_chat/provider/slack/slack_command_controller.rb

@@ -11,9 +11,9 @@ module DiscourseChat::Provider::SlackProvider
                        only: :command
 
     def command
-      text = process_command(params)
+      message = process_command(params)
 
-      render json: { text: text }
+      render json: message
     end
 
     def process_command(params)
@@ -42,7 +42,7 @@ module DiscourseChat::Provider::SlackProvider
         return process_post_request(channel, tokens, params[:channel_id])
       end
 
-      return ::DiscourseChat::Helper.process_command(channel, tokens)
+      return { text: ::DiscourseChat::Helper.process_command(channel, tokens)}
 
     end
 
@@ -73,7 +73,7 @@ module DiscourseChat::Provider::SlackProvider
       return error_text unless response.kind_of? Net::HTTPSuccess
       json = JSON.parse(response.body)
       return error_text unless json['ok']
-      users = json["members"]
+      raw_users = json
 
       # Now load the chat message history
       req = Net::HTTP::Post.new(URI('https://slack.com/api/channels.history'))
@@ -89,78 +89,18 @@ module DiscourseChat::Provider::SlackProvider
       return error_text unless response.kind_of? Net::HTTPSuccess
       json = JSON.parse(response.body)
       return error_text unless json['ok']
+      raw_history = json
 
-      first_post_link = "https://slack.com/archives/#{slack_channel_id}/p"
-      first_post_link += json["messages"].reverse.first["ts"].gsub('.', '')
+      transcript = SlackTranscript.new(raw_history, raw_users, slack_channel_id)
 
-      post_content = ""
-
-      post_content << "[quote]\n"
-
-      post_content << "[**#{I18n.t('chat_integration.provider.slack.view_on_slack')}**](#{first_post_link})\n"
-
-      users_in_transcript = []
-      last_user = ''
-      json["messages"].reverse.each do |message|
-        next unless message["type"] == "message"
-
-        username = ""
-        if user_id = message["user"]
-          user = users.find { |u| u["id"] == user_id }
-          users_in_transcript << user
-          username = user["name"]
-        elsif message.key?("username")
-          username = message["username"]
-        end
-
-        same_user = last_user == username
-        last_user = username
-
-        if not same_user
-          post_content << "\n"
-          post_content << "![#{username}] " if message["user"]
-          post_content << "**@#{username}:** "
-        end
-
-        text = message["text"]
-
-        # Format links (don't worry about special cases @ # !)
-        text.gsub!(/<(.*?)>/) do |match|
-          group = $1
-          parts = group.split('|')
-          link = parts[0].start_with?('@', '#', '!') ? '' : parts[0]
-          text = parts.length > 1 ? parts[1] : parts[0]
-          "[#{text}](#{link})"
-        end
-
-        # Add an extra * to each side for bold
-        text.gsub!(/\*(.*?)\*/) do |match|
-          "*#{match}*"
-        end
-
-        post_content << message["text"]
-
-        if message.key?("attachments")
-          message["attachments"].each do |attachment|
-            next unless attachment.key?("fallback")
-            post_content << "\n> #{attachment["fallback"]}\n"
-          end
-        end
-
-        post_content << "\n"
-      end
-
-      post_content << "[/quote]\n\n"
-
-      users_in_transcript.uniq.each do |user|
-        post_content << "[#{user["name"]}]: #{user["profile"]["image_24"]}\n" if user
-      end
+      post_content = transcript.build_transcript
 
       secret = DiscourseChat::Helper.save_transcript(post_content)
 
       link = "#{Discourse.base_url}/chat-transcript/#{secret}"
 
-      return "<#{link}|#{I18n.t("chat_integration.provider.slack.post_to_discourse")}>"
+      return { text: "<#{link}|#{I18n.t("chat_integration.provider.slack.post_to_discourse")}>",
+             }
 
     end
 

lib/discourse_chat/provider/slack/slack_provider.rb

@@ -151,4 +151,5 @@ module DiscourseChat::Provider::SlackProvider
 end
 
 require_relative "slack_message_formatter.rb"
+require_relative "slack_transcript_helper.rb"
 require_relative "slack_command_controller.rb"

lib/discourse_chat/provider/slack/slack_transcript_helper.rb

@@ -0,0 +1,127 @@
+module DiscourseChat::Provider::SlackProvider
+  class SlackMessage
+    def initialize(raw_message, transcript)
+      @raw = raw_message
+      @transcript = transcript
+    end
+
+    def username
+      if user
+        return user['name']
+      elsif @raw.key?("username")
+        return @raw["username"]
+      end
+    end
+
+    def avatar
+      return nil unless user
+      return user["profile"]["image_24"]
+    end
+
+    def url
+      channel_id = @transcript.channel_id
+      ts = @raw['ts'].gsub('.', '')
+
+      return "https://slack.com/archives/#{channel_id}/p#{ts}"
+    end
+
+    def text
+      text = @raw["text"]
+
+      # Format links (don't worry about special cases @ # !)
+      text.gsub!(/<(.*?)>/) do |match|
+        group = $1
+        parts = group.split('|')
+        link = parts[0].start_with?('@', '#', '!') ? '' : parts[0]
+        text = parts.length > 1 ? parts[1] : parts[0]
+        "[#{text}](#{link})"
+      end
+
+      # Add an extra * to each side for bold
+      text.gsub!(/\*(.*?)\*/) do |match|
+        "*#{match}*"
+      end
+
+      return text
+    end
+
+    def attachments
+      attachments = []
+
+      return attachments unless @raw.key?('attachments')
+
+      @raw["attachments"].each do |attachment|
+        next unless attachment.key?("fallback")
+        attachments << attachment["fallback"]
+      end
+
+      return attachments
+    end
+
+    private
+      def user
+        return nil unless user_id = @raw["user"]
+        users = @transcript.users
+        user = users.find { |u| u["id"] == user_id }
+      end
+
+  end
+
+  class SlackTranscript
+    attr_reader :users, :channel_id
+
+    def initialize(raw_history, raw_users, channel_id)
+      # Build some message objects
+      @messages = []
+      raw_history['messages'].reverse.each do |message|
+        next unless message["type"] == "message"
+        @messages << SlackMessage.new(message, self)
+      end
+
+      @users = raw_users['members']
+      @channel_id = channel_id
+    end
+
+    def build_transcript
+      post_content = "[quote]\n"
+      post_content << "[**#{I18n.t('chat_integration.provider.slack.view_on_slack')}**](#{@messages.first.url})\n"
+
+      all_avatars = {}
+
+      last_username = ''
+
+      @messages.each do |m|
+        same_user = m.username == last_username
+        last_username = m.username
+
+        unless same_user
+          if avatar = m.avatar
+            all_avatars[m.username] ||= avatar
+          end
+
+          post_content << "\n"
+          post_content << "![#{m.username}] " if m.avatar
+          post_content << "**@#{m.username}:** "
+        end
+
+        post_content << m.text
+
+        m.attachments.each do |attachment|
+          post_content << "\n> #{attachment}\n"
+        end
+
+        post_content << "\n"
+      end
+
+      post_content << "[/quote]\n\n"
+
+      all_avatars.each do |username, url|
+        post_content << "[#{username}]: #{url}\n"
+      end
+
+      return post_content
+    end
+
+  end
+
+end