Slack: Support private channels

butterrobot/platforms/slack.py

@@ -76,11 +76,16 @@ class SlackPlatform(Platform):
             logger.debug("Discarding message", data=data)
             return
 
-        if data["event"]["type"] != "message":
+        logger.debug("Parsing message", platform=cls.ID, data=data)
+
+        if data["event"]["type"] not in ("message", "message.groups"):
             return
 
-        logger.debug("Parsing message", platform=cls.ID, data=data)
-        return Message(
+        # Surprisingly, this *can* happen.
+        if "text" not in data["event"]:
+            return
+
+        message = Message(
             id=data["event"].get("thread_ts", data["event"]["ts"]),
             author=data["event"].get("user"),
             from_bot="bot_id" in data["event"],
@@ -90,3 +95,11 @@ class SlackPlatform(Platform):
             channel=cls.parse_channel_from_message(data),
             raw=data,
         )
+
+        logger.info(
+            "New message",
+            platform=message.channel.platform,
+            channel=cls.parse_channel_name_from_raw(message.channel.channel_raw),
+        )
+
+        return message