Notify User on change

[dns2utf8]

Let the user set a Notification Request for some time.

Example:
User sends the message:

/alert 2h

So the bot would alert the user within the next two hours about every change.

/cancel

Would abort the alerts.

[dbrgn]

What change? In the opening status? Or in the number of people?

[dns2utf8]

for now I would focus on any change in the sensors object

[dbrgn]

That will send you an alert every few seconds when the temperature changes ;)

[dbrgn]

But the general idea is cool!

[dns2utf8]

The flooding could be avoided with:

• define a minimal Distance for each kind of Sensor
• extending the Syntax to /alert [sensor] [max Time]

[dbrgn]

Yeah, I like the second idea.

[dns2utf8]

I defined a Grammer for the UserInput, please review:
https://github.com/coredump-ch/coredumpbot/blob/compiler_style/src/user_input_compiler.rs

[dbrgn]

If you create a "work in progress" pull request we can add comments to it :)

[dns2utf8]

#11

[dns2utf8]

Continued in #27