servius/src/memory.js

Servius is a comprehensive npm package for server monitoring,providing tracking of CPU load, free memory, disk usage, process count, and other important system resources. It also offers details on CPU, server uptime, last boot time, OS, disk partitions,pr

const shelljs = require("shelljs");

// Memory Start 
const VirtualMemory = (raw) => {
    raw = raw || false

    let data = shelljs.exec('cat /proc/meminfo', {silent: true}).stdout.trim()
    data = data.split('\n')
    let meminfo = {}
    data.forEach(line => {
        const lineval = line.split(':')
        switch (lineval[0]) {
            case 'MemTotal':
                let totalmem = raw ? lineval[1].trim().split(' ')[0] : bytestohuman(lineval[1].trim().split(' ')[0])
                meminfo.totalmem = totalmem
                break;
            case 'MemFree':
                let freemem = raw ? lineval[1].trim().split(' ')[0] : bytestohuman(lineval[1].trim().split(' ')[0])
                meminfo.freemem = freemem
                break;
            case 'MemAvailable':
                let availmem = raw ? lineval[1].trim().split(' ')[0] : bytestohuman(lineval[1].trim().split(' ')[0])
                meminfo.availmem = availmem
                break
            case 'Cached':
                let cachedmem = raw ? lineval[1].trim().split(' ')[0] : bytestohuman(lineval[1].trim().split(' ')[0])
                meminfo.cachedmem = cachedmem
                break
            case 'Shmem':
                let sharedmem = raw ? lineval[1].trim().split(' ')[0] : bytestohuman(lineval[1].trim().split(' ')[0])
                meminfo.sharedmem = sharedmem
                break
        }   

    });

    /* Since Used Is Removed For Now This Will Not Be Used
    return JSON.parse(JSON.stringify({ total: total, used: used, free: free, shared: shared, chached: chached, available: avail})) */

    return JSON.parse(JSON.stringify({ total: meminfo.totalmem, free: meminfo.freemem, cached: meminfo.cachedmem, available: meminfo.availmem, shared: meminfo.sharedmem}))
}

const SwapMemory = (raw) => {
    raw = raw || false

    let total = raw ? shelljs.exec("free | awk '/^Swap:/ {print $2}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $2}'", {silent:true}).stdout.split('\n')[0])
    let used = raw ? shelljs.exec("free | awk '/^Swap:/ {print $3}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $3}'", {silent:true}).stdout.split('\n')[0])
    let free = raw ? shelljs.exec("free | awk '/^Swap:/ {print $4}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $4}'", {silent:true}).stdout.split('\n')[0])
    let shared = raw ? shelljs.exec("free | awk '/^Swap:/ {print $5}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $5}'", {silent:true}).stdout.split('\n')[0])
    let chached = raw ? shelljs.exec("free | awk '/^Swap:/ {print $6}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $6}'", {silent:true}).stdout.split('\n')[0])
    let avail = raw ? shelljs.exec("free | awk '/^Swap:/ {print $7}'", {silent:true}).stdout.split('\n')[0] : bytestohuman(shelljs.exec("free | awk '/^Swap:/ {print $7}'", {silent:true}).stdout.split('\n')[0])

    return JSON.parse(JSON.stringify({ total: total, used: used, free: free, shared: shared, chached: chached, available: avail}))
}
// Memory End

module.exports = { SwapMemory, VirtualMemory}

// Handlers

const bytestohuman = (bytes) => {
    const sizes = ['KB', 'MB', 'GB', 'TB'];
    bytes = bytes || 0
    if (bytes == 0) return '0 B';
    const i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
    const size = bytes / Math.pow(1024, i);
    const formattedSize = parseFloat(size.toFixed(2));
    return `${formattedSize} ${sizes[i]}`;
}