Haha-Yes/commands/admin/tag.js

const { Command } = require('discord-akairo');
const fs = require('fs');

class TagCommand extends Command {
    constructor() {
        super('tag', {
            aliases: ['tag'],
            category: 'admin',
            split: 'quoted',
            args: [
                {
                    id: "trigger",
                    type: "string"
                },
                {
                    id: "response",
                    type: "string"
                }
            ],
            channelRestriction: 'guild',
            description: {
                content: 'Create custom autoresponse',
                usage: '[trigger] [response]',
                examples: ['"do you know da wea" "Fuck off dead meme"']
            }
        });
    }

    async exec(message, args) {
        let trigger = args.trigger;
        let response = args.response;

        trigger = trigger.toLowerCase();
        do {
            trigger = trigger.replace('--', ' ');
        } while (trigger.includes('--'))

        let customresponse = {};
        let json = JSON.stringify(customresponse);

        fs.readFile(`./tag/${message.guild.id}.json`, 'utf8', function readFileCallback(err, data) {
            if (err) {
                fs.writeFile(`./tag/${message.guild.id}.json`, `{"${trigger}":"${response}"}`, function (err) {
                    if (err) {
                        fs.close();
                        console.log(err);
                    }
                })
            } else {
                customresponse = JSON.parse(data); //now it an object
                customresponse[trigger] = response
                json = JSON.stringify(customresponse); //convert it back to json
                fs.writeFile(`./tag/${message.guild.id}.json`, json, 'utf8', function (err) {
                    if (err) {
                        fs.close();
                        return console.log(err);
                    }
                })
            }
        });

        fs.close();
        return message.channel.send(`autoresponse have been set to ${trigger} : ${response}`);
    }
}

module.exports = TagCommand;