Add ralph scheduler

[ehou1000]

What has been done

• Adding this schedule package so that we can make ralph do things at certain time intervals

How to test locally

Hubot> ralph help schedule
ralph schedule [add|new] "<cron pattern>(,<utc offset>)" <message> - Schedule a message that runs recurrently
ralph schedule [add|new] "<datetime pattern>" <message> - Schedule a message that runs on a specific date and time
ralph schedule [add|new] #<room> "<cron pattern>(,<utc offset>)" <message> - Schedule a message to a specific room that runs recurrently
ralph schedule [add|new] #<room> "<datetime pattern>" <message> - Schedule a message to a specific room that runs on a specific date and time
ralph schedule [cancel|del|delete|remove] <id> - Cancel the schedule
ralph schedule [upd|update] <id> <message> - Update scheduled message
ralph schedule env - Show hubot schedule environments
ralph schedule list #<room> - List all scheduled messages for specified room
ralph schedule list - List all scheduled messages for current room
ralph schedule list all - List all scheduled messages for any rooms

[ethowitz]

There may be some weirdness surrounding specifying topic and stream names given https://github.com/zulip/hubot-zulip/blob/master/adapter.coffee#L103
and
https://github.com/matsukaz/hubot-schedule/blob/master/src/scripts/schedule.coffee#L56

(I don't know what msg.match[1] is doing, but I am afraid that the space between the stream and topic names won't work here)

edit JK the regex checks out

[raws]

This works great, except for how schedules don't seem to actually cancel until the bot is restarted 😬 They get removed from persisted storage, but I think this line in hubot-schedule isn't doing what it's supposed to:

https://github.com/matsukaz/hubot-schedule/blob/e4b22f54d9d47d9b7698901d6dd650607119a011/src/scripts/schedule.coffee#L189

[ethowitz]

@raws what are you talking about this seems like ideal behavior