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[0] in function chmod in /var/www/hopeinstoughton_www/wp-content/plugins/simple-universal-google-analytics/main.php on line 8
[1] in function include_once in /var/www/hopeinstoughton_www/wp-settings.php on line 560
[2] in function require_once in /var/www/hopeinstoughton_www/wp-config.php on line 85
[3] in function require_once in /var/www/hopeinstoughton_www/wp-load.php on line 50
[4] in function require_once in /var/www/hopeinstoughton_www/wp-blog-header.php on line 13
[5] in function require in /var/www/hopeinstoughton_www/index.php on line 17

<?php

namespace modules\crontab;

//to do: if crontab does not exist, use a central website
// requires pcntl_fork

class main extends \moduleMain {
	use \modules\input\traits {
		\modules\input\traits::__construct as __ConstructInput;
	}
	
	private $model_cron;
	
	public function __construct() {
		parent::__construct(__DIR__);
		$this->__ConstructInput();
        $this->model_cron = $this->LoadModel('cron_model');
	}

	// register hooks
	public function Activate() {
		hook_add('crontab.add', [$this, '__crontab_add']);
		hook_add('crontab.remove', [$this, '__crontab_remove']);
		hook_add('crontab.running', [$this, '__crontab_running']);		// is the current process running within the Tick() process
	}
	
	// run php from the command line to see if pcntl_fork exists
	private function _validateExecutable() {
		$exe = $this->model_cron->getExecutable();
		$safe = escapeshellcmd($exe);
		$commandline = $safe . ' -r \'echo (function_exists("pcntl_fork") ? 1 : 0);\'';
		$output = `$commandline`;
		return (int)$output;
	}
	
	public function Validate() {
		// this only works for the CLI version of php. Not present in apache2
		$ok = $this->_validateExecutable();
		if (! $ok) {
			return ['result' => 1000, 'message' => 'PCNTL functions not available on this PHP-CLI installation.'];
			// also make sure it is not present in php.ini::disable_functions
		}
		return TRUE;
	}
	
// on activate: add entry to crontab - run every minute
	public function onEnable() {
		return $this->model_cron->AddCron('* * * * *', [$this, 'tick'], TRUE);
	}
	
// on deactivate - remove it
	public function onDisable() {
		return $this->model_cron->RemoveCron([$this, 'tick']);
	}
	
	public function __crontab_add($schedule, $command) {
		return $this->model_cron->AddCron($schedule, $command, TRUE);
	}
	public function __crontab_remove($command) {
		return $this->model_cron->RemoveCron($command);
	}
	
	public function __crontab_running(&$result) {
		$result = $this->model_cron->IsRunning();
	}

	// this is called from crontab every minute; should not generate any output
	// /~/crontab/tick
	/** everyone */
	final function tick() {
		header('Content-type: text/plain');
		// get the hostname from settings
		$hostname = $this->settings['hostname'] ?? '';
		if ($hostname != '') $this->BaseUrl($hostname);
		
		list($dd,$mm,$hh,$ii,$yy) = explode(',', gmdate('j,n,G,i,Y'));
		if (isset($_GET['time'])) {
			list($h, $i) = explode(':', $_GET['time']);
			$hh = intval($h, 10);
			$ii = intval($i, 10);
		}
		$dt = gmmktime($hh, $ii, 0, $mm, $dd, $yy);
		set_time_limit(0);
        $this->model_cron->Tick($dt);
        exit;
	}
	
/*	final function test() {
		header('Content-type: text/plain');
		$m = $this->AddCron('* * * * *', [$this, 'Event'], TRUE);
		var_dump($m);
		exit;
	} */
	
}