Command message publique

const Discord = require(`discord.js`);
const client = new Discord.Client();
const Long = require(`long`); // INSTALlATION OBLIGATOIRE !!

const token = `TOKEN`;
const prefix = `+`;

client.on(`ready`, () => {
    return console.log(`${client.user.username} est en ligne !`);
});

client.on(`message`, async (message) => {
    if (message.author.bot) return;
    if (message.content.indexOf(prefix) != 0) return;
    const args = message.content.slice(prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();
    if (command == `public-message`) {
        if (!args[0]) {
            const embed = new Discord.MessageEmbed()
                .setColor(`#0099FF`)
                .setAuthor(message.author.username, message.author.displayAvatarURL({
                    dynamic: true
                }))
                .setTitle(`Vous devez spécifiez un message !`)
                .setTimestamp()
                .setFooter(client.user.username, client.user.displayAvatarURL({
                    dynamic: true
                }));
            return message.channel.send(embed);
        } else {
            client.guilds.cache.forEach((guild) => {
                const getDefaultChannel = (guild) => {
                    if (guild.systemChannel) return guild.systemChannel;
                    return guild.channels.cache.filter(c => c.type == `text` && c.permissionsFor(guild.client.user).has(`SEND_MESSAGES`)).sort((a, b) => a.position - b.position || Long.fromString(a.id).sub(Long.fromString(b.id)).toNumber()).first();
                };
                const embed = new Discord.MessageEmbed()
                    .setColor(`#0099FF`)
                    .setAuthor(message.author.username, message.author.displayAvatarURL({
                        dynamic: true
                    }))
                    .setDescription(args[0])
                    .setTimestamp()
                    .setFooter(client.user.username, client.user.displayAvatarURL({
                        dynamic: true
                    }));
                return getDefaultChannel(guild).send(embed);
            });
        };
    };
});

client.login(token);