Old POC for when reactions first came out on discord to use them as a question sort of thing

poc_reactions_discord_question.js

'use strict';

const Eris = require('eris')
    , fs = require('fs')
    , repl = require('repl');

let client = new Eris(fs.readFileSync('./key.txt', 'utf8'));

client.on('ready', () => console.log('connected'));


// Reaction awaiting struct
let waitForReactions = {}; // obj[questionMessage.id] = reactionHandler;
class ReactionYesNo {
    constructor(questionMessage, user, timeout, cb) {
        this.message = questionMessage;
        this.user = user;
        this.cb = cb;

        this.timeout = setTimeout(() => {
            this.message.delete(); // ran out of time
        }, timeout);

        // attach the tick/cross
        setTimeout(() => {
            questionMessage.addReaction(encodeURI('✅'))
                .then(() => questionMessage.addReaction(encodeURI('❌')))
                .catch(console.log);
        }, 750); // just wait a sec
    }

    handle(emoji, userID) {
        if (userID !== this.user.id)
            return; // wrong user reacting

        if (emoji.id !== null)
            return; // must be the stock emoji

        if (emoji.name === '✅')
            return this.approve();

        if (emoji.name === '❌')
            return this.reject();
    }

    clean() {
        clearTimeout(this.timeout);
        delete waitForReactions[this.message.id];
    }

    approve() {
        console.log(this.message.id + ' approved');
        this.clean();
        this.message.delete()
            .then(this.cb);
    }

    reject() {
        console.log(this.message.id + ' rejected');
        this.clean();
        this.message.delete();
    }
}

client.on('messageCreate', message => {
    if (message.content !== '!reactiontest')
        return;

    let testMsgToCleanup;
    message.channel.createMessage('Kappa')
        .then(m => testMsgToCleanup = m)
        .then(() => message.channel.createMessage('Are you sure you wish to clean up the above message? *(Click the options below to approve or reject.)*'))
        .then(m => waitForReactions[m.id] = new ReactionYesNo(m, message.author, 30000, () => testMsgToCleanup.delete()));
});

client.on('messageReactionAdd', (message, emoji, userID) => {
    if (userID === client.user.id || !waitForReactions[message.id])
        return;

    console.log('handling ' + message.id)
    waitForReactions[message.id].handle(emoji, userID);
});

client.connect();

let replS = repl.start({ prompt: 'r> '});
replS.context.client = client;
replS.context.waitForReactions = waitForReactions;