messageHandler.js

const Discord = require('azrael-djs');

const handler = {};

let ClientID = null,
  Guild = null;

let addTextChannel = (textChannel, title, body, color, footer, thumbnail) => {
  handler[textChannel] = {
    title,
    body,
    color,
    footer,
    thumbnail
  };
};

let add = (channel, title, body, color, footer, thumbnail) => {
  switch (Guild.channels.cache.get(channel).type) {
    case 'GUILD_CATEGORY':
      Guild.channels.cache.filter(c => c.parentID === channel).forEach(textChannel => {
        addTextChannel(textChannel.id, title, body, color, footer, thumbnail);
      });
      break;
    case 'GUILD_TEXT':
      addTextChannel(channel, title, body, color, footer, thumbnail);
      break;
  }
};

let sendMessage = channel => {
  Guild.channels.cache.get(channel).send(new Discord.MessageEmbed({
    title: handler[channel]['title'],
    fields: [{
      name: "** **",
      value: handler[channel]['body']
    }]
  }).setColor(handler[channel]['color']).setThumbnail(handler[channel]['thumbnail']).setFooter(handler[channel]['footer']));
};

let deleteLastMessage = (channel, callback) => {
  channel.messages.fetch({
    limit: 100
  }).then(messages => {
    let lastMessage = messages.find(message => message.author.id === ClientID);
    if (!lastMessage) return callback();
    lastMessage.delete().then(() => callback());
  });
};

module.exports = {
  init: (clientId, guild, messages) => {
    ClientID = clientId;
    Guild = guild;
    messages.forEach(item => {
      if (item['channels']) return item['channels'].forEach(channel => {
        add(channel, item['title'], item['body'], item['color'] || '#FFFFFF', item['footer'], item['thumbnail']);
      });
      add(item['channel'], item['title'], item['body'], item['color'] || '#FFFFFF', item['footer'], item['thumbnail']);
    });
    Object.keys(handler).forEach(channel => deleteLastMessage(Guild.channels.cache.get(channel), () => sendMessage(channel)));
  },
  handle: message => {
    if (!handler[message.channel.id] || message.channel.lastMessage.author.id === ClientID) return;
    deleteLastMessage(message.channel, () => sendMessage(message.channel.id));
  }
};