Allow Link formatting via chat.postMessage

lib/lita/adapters/slack.rb

@@ -15,10 +15,24 @@ def run
         rtm_connection.run
       end
 
-      def send_messages(target, strings)
-        return unless rtm_connection
+      def send_messages(target, messages)
+        # split messages between RTM and API
+        # RTM gets strings that don't match <>
+        # API gets everything else
+
+        string_messages = []
+        complex_messages = []
+
+        messages.each do |m|
+          if m.is_a?(String) && !m.match(/\<.*\>/)
+            string_messages << m
+          else
+            complex_messages << m
+          end
+        end
 
-        rtm_connection.send_messages(channel_for(target), strings)
+        send_string_messages(target,string_messages) if string_messages.any?
+        send_complex_messages(target,complex_messages) if complex_messages.any?
       end
 
       def set_topic(target, topic)
@@ -45,6 +59,18 @@ def channel_for(target)
           target.room
         end
       end
+
+      def send_string_messages(target, messages)
+        return unless rtm_connection
+
+        rtm_connection.send_messages(channel_for(target), messages)
+      end
+
+      def send_complex_messages(target, messages)
+        messages.each do |message|
+          API.new(config).post_message(channel_for(target), message)
+        end
+      end
     end
 
     # Register Slack adapter to Lita

lib/lita/adapters/slack/api.rb

@@ -24,6 +24,24 @@ def set_topic(channel, topic)
           call_api("channels.setTopic", channel: channel, topic: topic)
         end
 
+        def post_message(channel, message)
+          if message.is_a?(String)
+            message = {text:message}
+          else
+            raise "Slack message requires a text param" unless message[:text]
+
+            if params[:attachments]
+              params[:attachments] = JSON.dump(message[:attachments])
+            end
+
+          end
+
+
+          call_api('chat.postMessage',
+                   { as_user: true,
+                     channel: channel }.merge(message))
+        end
+
         def rtm_start
           response_data = call_api("rtm.start")