xNightR00T File Manager

<?php

namespace JobQueue\View\Helper;

use Zend\View\Helper\AbstractHelper;
use Application\Module,
    Deployment\Model;

class JobDetailsCronToHuman extends AbstractHelper
{

    /**
     * Try to convert the crontab style line to a human readable format.
     * Supports only formats the user can add through the UI
     * If the function can't convert it properly, it will return the crontab line
     * as is.
     *
     * @param string $line
     * @return string
     */
    public function __invoke($line)
    {

        $parts = explode(' ', $line);
        switch (count($parts)) {
            case 1:
                // hourly at 15 minutes after the hour - 15
                // every 40 minutes - */40
                return self::getTimeByMintues($line);
                break;
            case 2:
                // daily at 11:45 - 45 11
                // every five hours - 0 */5
                return self::getTimeByHours($line);
                break;
            case 3:
                // monthly on the 3rd and 15th at 11:25 - 25 11 3,15
                return self::getTimeMonthly($line);
                break;
            case 5:
                // weekly on Monday,Wednesday,Friday at 15:00 - 00 15 * * 1,3,5
                return self::getTimeWeekly($line);
                break;
            default:
                return $line;
        }
    }

    /**
     * @param string $line
     * @return Zwas_Text|string
     */
    private static function getTimeByMintues($line)
    {
        if (ctype_digit($line)) {
            // hourly at 15 minutes after the hour - 15
            return _t('%s minutes after every given hour', array($line));
        } else if (0 === strpos($line, '*/')) {
            // every 40 minutes - */40
            $time = substr($line, 2, strlen($line) - 2);
            if (ctype_digit($time)) {
                return _t('Every %s', array(self::getRepeatedString($time, 'minute')));
            }
        }

        return $line; // the line doesn't match the allowed formats
    }

    private static function getRepeatedString($value, $unit)
    {
        if ($value > 1) {
            return "{$value} {$unit}s";
        }

        return $unit;
    }

    /**
     * @return string
     * @return Zwas_Text|string
     */
    private static function getTimeByHours($line)
    {
        $parts = explode(' ', $line);
        if (2 === count($parts)) {
            $minutes = $parts[0];
            $hours   = $parts[1];
            if (ctype_digit($minutes)) {
                if (ctype_digit($hours)) {
                    // daily at 11:45 - 45 11
                    return _t('Daily at %s', array(self::getFormattedTime($hours, $minutes)));
                }
            }

            if (0 === strpos($hours, '*/')) {
                // every five hours - 0 */5
                $time = substr($hours, 2, strlen($line) - 2);
                return _t('Every %s', array(self::getRepeatedString($time, 'hour')));
            }

            // different format of 'Every x min/hours/days' 'M 7'/'H 8'/'D 9'
            if ($minutes == 'M') {
                return _t('Every %s', array(self::getRepeatedString($hours, 'minute')));
            } else if ($minutes == 'H') {
                return _t('Every %s', array(self::getRepeatedString($hours, 'hour')));
            } else if ($minutes == 'D') {
                return _t('Every %s', array(self::getRepeatedString($hours, 'day')));
            }
        }


        return $line; // the line doesn't match the allowed formats
    }

    /**
     * @return string
     * @return Zwas_Text|string
     */
    private static function getTimeMonthly($line)
    {
        $parts = explode(' ', $line);
        if (3 === count($parts)) {
            // monthly on the 3rd and 15th at 11:25 - 25 11 3
            $minutes     = $parts[0];
            $hours       = $parts[1];
            $daysOfMonth = $parts[2];
            if (ctype_digit($minutes) && ctype_digit($hours)) {
                return _t('On the %s of every month at %s',
                    array(self::getTextualDaysOfMonth($daysOfMonth), self::getFormattedTime($hours, $minutes)));
            }
        }
        return $line;
    }

    /**
     * @return string
     * @return Zwas_Text|string
     */
    private static function getTimeWeekly($line)
    {
        $parts = explode(' ', $line);
        if (5 === count($parts)) {
            $minutes     = $parts[0];
            $hours       = $parts[1];
            $daysOfMonth = $parts[2];
            $months      = $parts[3];
            $daysOfWeek  = $parts[4];

            // weekly - 00 15 * * 1,3,5
            if (('*' === $daysOfMonth) && ('*' === $months)) {
                if (ctype_digit($minutes) && ctype_digit($hours)) {
                    // safety from 00 15 * * 1-3
                    if (!preg_match('/^[0-6]{1}(?:\,[0-6]{1})*$/', $daysOfWeek)) {
                        return $line;
                    }
                    return _t('Weekly on %s at %s',
                        array(self::getTextualDaysOfWeek($daysOfWeek), self::getFormattedTime($hours, $minutes)));
                }
            }
        }
        return $line;
    }

    /**
     * @param integer $hours
     * @param integer $minutes
     * @return string
     */
    private static function getFormattedTime($hours, $minutes)
    {
        return sprintf('%02d:%02d', $hours, $minutes);
    }

    /**
     * @param string $days comma separated cron days notation 0-Sunday, 1-Monday, etc.
     * @return string comma separated day names e.g. Sunday,Monday,Wednesday
     */
    private static function getTextualDaysOfWeek($days)
    {
        $daysOfWeek  = array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
        $textualDays = array();
        foreach (explode(',', $days) as $day) {
            $textualDays[] = $daysOfWeek[$day];
        }
        return implode(',', $textualDays);
    }

    /**
     * @param string $days comma separated cron days of month notation
     * @return string comman separated days of the month
     */
    private static function getTextualDaysOfMonth($days)
    {
        $textualDays = array();
        foreach (explode(',', $days) as $day) {
            // the unix epoch time is the first day of the month, so in order to convert 2 to the 2nd
            // $day-1 needs to be added to the unix epoch time
            $dayOfMonth    = ($day - 1) * 86400; // 24*60*60
            $textualDays[] = date('jS', $dayOfMonth);
        }
        return implode(',', $textualDays);
    }
}