channel info cannot be obtained by _get_channel_info in sensor

[dove-young]

I modified poll function in packs/slack/sensors/slack_sensor.py to include debugging

    def _api_call(self, method, **kwargs):
        result = self._client.api_call(method, **kwargs)

        self._logger.info('inside _api_call ... %s  and %s ' %  (method, kwargs) )
        self._logger.info(result)
        self._logger.info(type(result))

        if isinstance(result, str):
            result = json.loads(result)

        return result

And when I type messages in a slack channel, the poll result error message says [u'[ERROR] This method is retired and can no longer be used. Please use conversations.info instead

2020-08-05 08:36:37,968 140520872485744 INFO slack_sensor [-] inside _api_call ... channels.info  and {'channel': u'CSDBKG7BP'}
2020-08-05 08:36:37,969 140520872485744 INFO slack_sensor [-] {u'headers': {u'content-length': u'222', u'x-xss-protection': u'0', u'x-content-type-options': u'nosniff', u'content-encoding': u'gzip', u'x-slack-req-id': u'3f18d6ff700b054bfbb82af86fe11638', u'access-control-expose-headers': u'x-slack-req-id, retry-after', u'vary': u'Accept-Encoding', u'x-via': u'haproxy-www-u6qh,haproxy-edge-iad-sgwj', u'expires': u'Mon, 26 Jul 1997 05:00:00 GMT', u'server': u'Apache', u'access-control-allow-origin': u'*', u'x-slack-backend': u'r', u'strict-transport-security': u'max-age=31536000; includeSubDomains; preload', u'pragma': u'no-cache', u'cache-control': u'private, no-cache, no-store, must-revalidate', u'date': u'Wed, 05 Aug 2020 15:36:37 GMT', u'x-oauth-scopes': u'identify,bot:basic', u'referrer-policy': u'no-referrer', u'content-type': u'application/json; charset=utf-8', u'access-control-allow-headers': u'slack-route, x-slack-version-ts, x-b3-traceid, x-b3-spanid, x-b3-parentspanid, x-b3-sampled, x-b3-flags'}, u'ok': False, u'response_metadata': {u'messages': [u'[ERROR] This method is retired and can no longer be used. Please use conversations.info instead. Learn more: https://api.slack.com/changelog/2020-01-deprecating-antecedents-to-the-conversations-api.']}, u'error': u'method_deprecated'}
2020-08-05 08:36:37,970 140520872485744 INFO slack_sensor [-] <type 'dict'>
2020-08-05 08:36:37,970 140520872485744 INFO slack_sensor [-] channel_info is None

so there is no channel info returned by api call.

[srimandarbha]

Hi All

I didnt use slackclient library but with web methods deprecated, i made some small changes to slack_sensor.py as workaround to make it work for me. However , the web methods or code changes are needed +1

Thanks in advance

[nmaludy]

Can one of you submit a PR with the fixes you've made?

Thanks,
Nick

[winem]

Just came across this issue during the 3.5 pre-release testing. I'll add this to my backlog unless someone else wants to work on it. :)