cronmap.php

<?php

class TranslateCron {

    /**
    * @var string The cron expression.
    */
    protected $expression;

    // Just a reminder array for the positions in the expression.
    private $cronMap = [
        0 => 'minute',
        1 => 'hour',
        2 => 'dayOfMonth',
        3 => 'month',
        4 => 'dayOfWeek',
        5 => 'year'
    ];

    protected $dayMapping = [
        '*' => 'Every day',
        '0' => 'Sunday',
        '1' => 'Monday',
        '2' => 'Tuesday',
        '3' => 'Wednesday',
        '4' => 'Thursday',
        '5' => 'Friday',
        '6' => 'Saturday'
    ];

    protected $monthMapping = [
        '*' => 'Every month',
        '1' => 'January',
        '2' => 'February',
        '3' => 'March',
        '4' => 'April',
        '5' => 'March',
        '6' => 'June',
        '7' => 'July',
        '8' => 'August',
        '9' => 'September',
        '10' => 'October',
        '11' => 'November',
        '12' => 'December'
    ];

    public function __construct($expression = '* * * * * *') {
        $this->expression = $expression;
    }

    /**
    * @param string $expression
    *
    * Set the expression property.
    */
    public function setExpression($expression) {
    	$this->expression = $expression;
    }

    /**
    * Get the days of the week the job executes on.
    *
    * @return array
    */
    public function getDaysOfWeek() {
        $days = explode(',', explode(' ', $this->expression)[4]);
        if($this->isRecurring($days[0])) {
            return $this->returnFrame('days', explode('/', $days[0])[1]);
        }
        if($this->isRange($days[0])) {
        	return $this->returnFrame('days', $days[0]);
        }
        return array_map(function($day) { return $this->dayMapping[$day]; }, $days);
    }

    /**
    * Get the months the job executes on.
    *
    * @return array
    */
    public function getMonths() {
        $months = explode(',', explode(' ', $this->expression)[3]);
        if($this->isRecurring($months[0])) {
            return $this->returnFrame('months', explode('/', $months[0])[1]);
        }
        if($this->isRange($months[0])) {
        	return $this->returnFrame('months', $months[0]);
        }
        return array_map(function($month) { return $this->monthMapping[$month]; }, $months);
    }

    /**
    * Get the hours of the day the job executes on.
    *
    * @return array
    */
    public function getHours() {
        $hours = explode(',', explode(' ', $this->expression)[1]);
        if($hours[0] === '*') {
            return $this->returnFrame('hour');
        }
        if($this->isRecurring($hours[0])) {
            return $this->returnFrame('hours', explode('/', $hours[0])[1]);
        }
        if($this->isRange($hours[0])) {
        	return $this->returnFrame('hours', $hours[0]);
        }
        return $hours;
    }

    /**
    * Get the minutes of the hour the job executes on.
    *
    * @return array
    */
    public function getMinutes() {
        $minutes = explode(',', explode(' ', $this->expression)[0]);
        if($minutes[0] === '*') {
            return $this->returnFrame('minute');
        }
        if($this->isRecurring($minutes[0])) {
            return $this->returnFrame('minutes', explode('/', $minutes[0])[1]);
        }
        if($this->isRange($minutes[0])) {
        	return $this->returnFrame('minutes', $minutes[0])
        }
        return $minutes;
    }

    /**
    * Decide if the given time is a recurring task.
    *
    * @param string $time
    * @return boolean
    */
    protected function isRecurring($time) {
        return (bool) strstr($time, '/');
    }

    /**
    * Decide if the given time is a range.
    *
    * @param string $time
    * @return boolean
    */
    protected function isRange($time) {
        return (bool) strstr($time, '-');
    }


    /**
    * Morph the given frame into an array for the calling process.
    *
    * @param string $frame
    * @param string $interval
    * @return array
    */
    protected function returnFrame($frame, $interval = null) {
        if($interval) {
            return ["Every $interval $frame"];
        }
        return ["Every $frame"];
    }
}