Add reactions based events

[V-ed]

@V-ed commented on Sun Apr 15 2018

This could make for some interesting behaviors such as visual confirmation (see example below) or voting!

Just some explanations for that example : The bot could send a message with default reactions (choices) of which the user would add a reaction (by clicking on the reaction he wants) to input his choice.

In other words, this would enable a new interaction method with the bot, which is always useful.

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@V-ed commented on Mon Jul 30 2018

EDIT : This behavior of creating ReactForms easily is tracked in #124.

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TODO :
Track the message ID of the form in the buffer for the TextChannel and the available options.

A ReactOption object could be created to track what option is what and what has been selected. This could be part of a ReactMessage where the id of the message would be stored (the first line of this comment).

I imagine something like this :

public class ReactMessage {
	
	public ReactMessage(String messageId, ReactOption... options){
		[...]
	}
	
}

and this for the ReactOption :

public class ReactOption {
	
	public ReactOption(String emoji, int countBeforeChosen){
		[...]
	}
	
}