Calculating dates (Discord.js)

Question

I’m trying to develop a kind of Mod record for my Discord Bot.

Ps: I do not believe it is necessary knowledge of Discord.js to solve the question

How it would work: The user with administrator permissions would review modstats, and the bot would return a/embed table with the information of when was the last time a moderator used a command ban/mute/kick/warn (are already ready) as follows:

warns (última semana): [número]
warns (último mês): [numero]
warns (ano inteiro): [numero]

I was wondering how to get the bot to record the day the last warning was made, and calculate the time interval between the previous one. I thought of something like:

const warn = require('link_do_arquivo_de_warn.js')
const hoje = new Date(); // Data de hoje
const ultimaVez = new Date('2014-07-07'); // Outra data no passado

let calcular = new CalcularIntevaloDeDatas() // função de calcular que eu não faço muita ideia de como montar

if (message.content == warn) //caso algum mod dê um warn

{ 
db.data.banidos.push(hoje)
db.data.banidos[0]            //salva a data de hoje no banco de dados (essa parte não é muito importante. Estou usando um banco chamado LOWDB)
}

if (message.content == "modstats") { return calcular }

console.log(calcular)

But the point is I don’t know how to calculate the difference between the dates saved, I mean, assuming the moderator gave a warn 3 days ago (warn 1), and one day today (warn 2). How do I let the bot know there were 2 Arns a week ago? Then I apply the same logic to the month and year...

Note: In addition to calculating dates, I must also save warn 2 as the last date, and warn 1 as the penultimate (that it is no longer saved as the last date), so I can calculate the next warn from warn 2 - and so on.

Answer 1

Just create a array, since you say there are only three possibilities. Then use the solutions already mentioned in the comments.

---

let r = {
  "semana": 0,
  "mes": 0,
  "sempre": 0
};

let now = new Date();

let dates = [
  now - (1000 * 60 * 60 * 24), // semana
  now - (1000 * 60 * 60 * 24 * 6), // semana
  now - (1000 * 60 * 60 * 24 * 8), // mes 
  now - (1000 * 60 * 60 * 24 * 34), // sempre
  now - (1000 * 60 * 60 * 24 * 100), //sempre
  now - (1000 * 60 * 60 * 24 * 130), //sempre
];

for (i = 0; i < dates.length; i++) {
  diff = (Math.floor((now - dates[i]) / (1000 * 60 * 60 * 24)));
  let m = "semana";
  switch (true) {
    case diff > 30:
      m = "sempre";
      break;
    case diff > 7:
      m = "mes";
      break;
  }
  r[m]++;
}

console.log(r);