Main.kt

import java.awt.Dimension
import java.io.File
import java.io.FileOutputStream
import java.lang.Exception
import java.net.URL
import java.text.SimpleDateFormat
import java.util.*
import javax.net.ssl.HttpsURLConnection
import javax.swing.BoxLayout
import javax.swing.JFrame
import javax.swing.JLabel
import javax.swing.JPanel

private const val baseMsSleep = 600000
private val format = SimpleDateFormat("yyyy-MM-dd HH-mm")
private val format2 = SimpleDateFormat("HH:mm:ss")

fun main() {
    var lastTime = 0L

    val frame = JFrame()

    val toolLabel = JLabel("PAO backup tool.")
    val nextLabel = JLabel("Next backup at: 00:00:00")
    val panel = JPanel()
    panel.layout = BoxLayout(panel, BoxLayout.PAGE_AXIS)
    panel.add(toolLabel)
    panel.add(nextLabel)
    
    frame.add(panel)
    frame.title = "PAOBackup"
    frame.defaultCloseOperation = JFrame.EXIT_ON_CLOSE
    frame.pack()
    frame.size = Dimension ((frame.width * 1.5).toInt(), frame.height)
    frame.setLocationRelativeTo(null)
    frame.isVisible = true

    while (true) {

        val time = System.currentTimeMillis()
        val overhead = if(lastTime == 0L) 0 else baseMsSleep - (time - lastTime)
        lastTime = time

        try {
            File("pao").mkdirs()
            val outFile = File("pao/${format.format(Date())}.png")
            val url = URL("https://pixelanarchy.online/canvas.png")

            val sslConnection = url.openConnection() as HttpsURLConnection
            sslConnection.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:221.0) Gecko/20100101 Firefox/31.0");
            sslConnection.inputStream.use { it ->
                FileOutputStream(outFile).use { it2 ->
                    it.copyTo(it2)
                    println("${outFile.name} saved!")
                }
            }

            sslConnection.disconnect()
        } catch (e: Exception) {
            e.printStackTrace()
        }
        println("Waiting 10 minutes...")
        nextLabel.text = "Next backup at: " + format2.format(Date(Date().time + baseMsSleep + overhead))
        Thread.sleep(baseMsSleep + overhead)
    }
}