auto correct self bot

acbot.js

/*
Create auth.js in same dir with module.exports = "token"
*/

const spc = require('spellchecker');
const {
    Client
} = require("discord.js");
const client = new Client({
    messageCacheMaxSize: 10,
    disabledEvents: ["TYPING_START"]
});

client.on("ready", () => console.log("Started."));

client.on("message", async m => {
    if (m.author.id !== client.user.id) return;
    let edited = getSpellingSuggestions(m.content);
    console.log(edited)
    edited = edited.suggestion ? edited.suggestion : m.content
    if (edited === m.content) return;
    try {
        await m.edit(edited);
    } catch (e) {}
});

client.login(require("./auth.js"));

function getSpellingSuggestions(str) {
    var misspellings = false,
        output = {},
        suggestion = [],
        corrections = {};
    output.original = str;

    var words = str.split(' ');
    var lastChar = getEnding(words[words.length - 1])

    var word, noPunctuation, correctSpelling, hasMistakes, hasCorrections;
    for (var i = 0; i < words.length; i++) {

        word = words[i];
        noPunctuation = word.replace(/\W/g, '');

        if (getEnding(word)) {
            word = word.slice(0, -1)
        }

        if (spc.isMisspelled(word)) {
            hasMistakes = true;
            correctSpelling = spc.getCorrectionsForMisspelling(word);
            if (correctSpelling.length) {
                hasCorrections = true;
                corrections[word] = correctSpelling;
            } else {
                corrections[word] = null;
            }
        }
    }

    for (correction in corrections) {
        if (correction && corrections[correction]) {
            var regex = new RegExp(correction, 'g');
            str = str.replace(regex, corrections[correction][0]);
        }
    }

    if (hasMistakes) {
        output.suggestion = hasCorrections ? str : null;
        output.corrections = corrections;
    } else {
        output.suggestion = false;
    }

    return output;
}

function getEnding(str) {
    var lastChar = str.slice(-1);
    if (!lastChar.match(/^[0-9a-z]+$/)) {
        return lastChar;
    } else {
        return false;
    }
}

function isEmpty(obj) {
    return Object.keys(obj).length === 0;
}