class.ilCronJob.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

abstract class ilCronJob
{
    const SCHEDULE_TYPE_DAILY = 1;
    const SCHEDULE_TYPE_IN_MINUTES = 2;
    const SCHEDULE_TYPE_IN_HOURS = 3;
    const SCHEDULE_TYPE_IN_DAYS = 4;
    const SCHEDULE_TYPE_WEEKLY = 5;
    const SCHEDULE_TYPE_MONTHLY = 6;
    const SCHEDULE_TYPE_QUARTERLY = 7;
    const SCHEDULE_TYPE_YEARLY = 8;
        
    //
    // SCHEDULE
    //
    
    public function isActive($a_ts_last_run, $a_schedule_type, $a_schedule_value, $a_manual = false)
    {
        if ($a_manual) {
            return true;
        }
        if (!$this->hasFlexibleSchedule()) {
            $a_schedule_type = $this->getDefaultScheduleType();
            $a_schedule_value = $this->getDefaultScheduleValue();
        }
        return $this->checkSchedule($a_ts_last_run, $a_schedule_type, $a_schedule_value);
    }
    
    public function getScheduleType()
    {
        if ($this->hasFlexibleSchedule() && $this->schedule_type) {
            return $this->schedule_type;
        }
    }
    
    public function getScheduleValue()
    {
        if ($this->hasFlexibleSchedule() && $this->schedule_value) {
            return $this->schedule_value;
        }
    }
    
    public function setSchedule($a_type, $a_value)
    {
        if ($this->hasFlexibleSchedule() &&
            in_array($a_type, $this->getValidScheduleTypes()) &&
            $a_value) {
            $this->schedule_type = $a_type;
            $this->schedule_value = $a_value;
        }
    }
    
    public function getValidScheduleTypes()
    {
        return array(self::SCHEDULE_TYPE_DAILY, self::SCHEDULE_TYPE_IN_MINUTES,
            self::SCHEDULE_TYPE_IN_HOURS, self::SCHEDULE_TYPE_IN_DAYS,
            self::SCHEDULE_TYPE_WEEKLY, self::SCHEDULE_TYPE_MONTHLY,
            self::SCHEDULE_TYPE_QUARTERLY, self::SCHEDULE_TYPE_YEARLY);
    }
    
    /*
     * Check if next run is due
     *
     * @param timestamp $a_ts_last_run
     * @param integer $a_schedule_type
     * @param integer $a_schedule_value
     * @return boolean
     */
    protected function checkSchedule($a_ts_last_run, $a_schedule_type, $a_schedule_value)
    {
        if (!$a_schedule_type) {
            return false;
        }
        if (!$a_ts_last_run) {
            return true;
        }
        
        $now = time();
        
        switch ($a_schedule_type) {
            case self::SCHEDULE_TYPE_DAILY:
                $last = date("Y-m-d", $a_ts_last_run);
                $ref = date("Y-m-d", $now);
                return ($last != $ref);
                
            case self::SCHEDULE_TYPE_WEEKLY:
                $last = date("Y-W", $a_ts_last_run);
                $ref = date("Y-W", $now);
                return ($last != $ref);
                
            case self::SCHEDULE_TYPE_MONTHLY:
                $last = date("Y-n", $a_ts_last_run);
                $ref = date("Y-n", $now);
                return ($last != $ref);
                
            case self::SCHEDULE_TYPE_QUARTERLY:
                $last = date("Y", $a_ts_last_run) . "-" . ceil(date("n", $a_ts_last_run)/3);
                $ref = date("Y", $now) . "-" . ceil(date("n", $now)/3);
                return ($last != $ref);
                
            case self::SCHEDULE_TYPE_YEARLY:
                $last = date("Y", $a_ts_last_run);
                $ref = date("Y", $now);
                return ($last != $ref);
            
            case self::SCHEDULE_TYPE_IN_MINUTES:
                $diff = floor(($now-$a_ts_last_run)/60);
                return ($diff >= $a_schedule_value);
                
            case self::SCHEDULE_TYPE_IN_HOURS:
                $diff = floor(($now-$a_ts_last_run)/(60*60));
                return ($diff >= $a_schedule_value);
                
            case self::SCHEDULE_TYPE_IN_DAYS:
                $diff = floor(($now-$a_ts_last_run)/(60*60*24));
                return ($diff >= $a_schedule_value);
        }
    }
    
    
    //
    // TITLE / DESCRIPTION
    //
    
    public function getTitle()
    {
    }
    
    public function getDescription()
    {
    }

    public function isManuallyExecutable()
    {
        return true;
    }
    
    //
    // SETTINGS
    //
    
    public function hasCustomSettings()
    {
        return false;
    }
    
    public function addCustomSettingsToForm(ilPropertyFormGUI $a_form)
    {
    }
    
    public function saveCustomSettings(ilPropertyFormGUI $a_form)
    {
        return true;
    }

    public function addToExternalSettingsForm($a_form_id, array &$a_fields, $a_is_active)
    {
    }
    
    
    //
    // HOOKS
    //
    
    public function activationWasToggled($a_currently_active)
    {
        // we cannot use ilObject or any higher level construct here
        // this may be called from setup, so it is limited to handling ilSetting/ilDB mostly
    }
    
    
    //
    // ABSTRACT
    //
    
    abstract public function getId();
    
    abstract public function hasAutoActivation();

    abstract public function hasFlexibleSchedule();
    
    abstract public function getDefaultScheduleType();
    
    abstract public function getDefaultScheduleValue();
        
    abstract public function run();
}