resources/app/javascript/appLogger.js

"use strict"

const fs = require("fs")

class xVAAppLogger {

    constructor (fileLocation, appVersion) {
        this.lines = []
        this.fileLocation = fileLocation

        if (fs.existsSync(fileLocation)) {
            const data = fs.readFileSync(fileLocation, "utf8")
            this.lines = data.split("\n")
        }

        this.prefix = ""
        this.log(`New session - ${appVersion}`)
    }

    log (message) {
        this.lines.push(`${(new Date()).toJSON().replace("T", "_")} |${this.prefix.length?` [${this.prefix}]:`:""} ${message}`)

        if (this.lines.length>1000) {
            this.lines = this.lines.slice(this.lines.length-1000, this.lines.length)
        }

        fs.writeFileSync(this.fileLocation, this.lines.join("\n"), "utf8")
    }

    print (message) {
        console.log(`${this.prefix.length?` [${this.prefix}]:`:""} ${message}`)
    }

    setPrefix (prefix) {
        this.prefix = prefix
    }
}

exports.xVAAppLogger = xVAAppLogger