How to check if user already sent message in channel? - discord

Question

I would like to block a user who want to send another message in a specific channel :
client.on("message", async message => {
if ((message.content === config.RUN) && message.member.roles.cache.has(config.ROLE_ID)) {
if (message.channel.type === 'DM') return;
let filter = m => !m.author.bot;
let destination = client.channels.cache.get(config.CHANNEL_ID);
message.author.createDM().then(dmchannel => {
dmchannel.send(textDM.FIRST_DM);
const collector = new discord.MessageCollector(dmchannel, filter);
collector.on('collect', (m, col) => {
console.log(m.content);
if (m.content.startsWith("ok")) { // here condition if user already sent msg
// Do something
}

Answer 1

You can use a variable to count the quantity of the message sent by the user. If it reaches 2, you can execute your desired code.
To use this for specific user, do:
var messageAmount = {}
var amount = 0
if (message.content.startsWith("ok")) {
const user = message.author.id
if(messageAmount[`${user}`] === 1) { // is 1 because it checks for 2 after it has been assigned, if(messageAmount = x-1)
// Do something
message.channel.send("You cannot say that again until (...) finishes")
// then reset it
messageAmount[`${user}`] = 0
amount = 0
} else {
++amount
messageAmount[`${user}`] = amount
}
}
To use this globally:
var messageAmount = 0
if (m.content.startsWith("ok")) {
++messageAmount
if(messageAmount === 2) {
// Do something
}
}