<?php
class Backup extends MY_Controller {
  var $backup_folder;
  function __construct(){
    parent::__construct();  
    $this->backup_folder = "/data-sda/backup-db/";
  }
  public function list_backup() {
    $cpones = glob($this->backup_folder . 'cpone/*');
    $cpone_logs = glob($this->backup_folder . 'cpone_log/*');
    // Recursive function to scan files
    $files = [];
    $files["cpone"]= [];
    foreach ($cpones as $file) {
      if (is_file($file)) {
        $files["cpone"][] = [
          'name' => basename($file),
          'full_path'=> $file,
          'last_modified' => date("Y-m-d H:i:s", filemtime($file)),
          'size' => $this->formatSize(filesize($file))
        ];
      } else {
        echo $file . " not file\n";
      }
    }

    $files["cpone_log"]= [];
    foreach ($cpone_logs as $file) {
      if (is_file($file)) {
        $files["cpone_log"][] = [
          'name' => basename($file),
          'full_path'=> $file,
          'last_modified' => date("Y-m-d H:i:s", filemtime($file)),
          'size' => $this->formatSize(filesize($file))
        ];
      }
    }
    // Sort files by last modified date descending
    usort($files["cpone"], function($a, $b) {
      return strtotime($b['last_modified']) - strtotime($a['last_modified']);
    });
    usort($files["cpone_log"], function($a, $b) {
      return strtotime($b['last_modified']) - strtotime($a['last_modified']);
    });

    // Return JSON response
    echo json_encode(["status"=>"OK","result"=>$files]);
  }

  private function formatSize($size) {
    $units = ['B', 'KB', 'MB', 'GB', 'TB'];
    $i = 0;
    while ($size >= 1024 && $i < count($units) - 1) {
      $size /= 1024;
      $i++;
    }
    return round($size, 2) . ' ' . $units[$i];
  }
}