core/Zotlabs/Daemon/Cron.php

<?php /** @file */

namespace Zotlabs\Daemon;

class Cron {

	static public function run($argc,$argv) {

		$maxsysload = intval(get_config('system','maxloadavg'));
		if($maxsysload < 1)
			$maxsysload = 50;
		if(function_exists('sys_getloadavg')) {
			$load = sys_getloadavg();
			if(intval($load[0]) > $maxsysload) {
				logger('system: load ' . $load . ' too high. Cron deferred to next scheduled run.');
				return;
			}
		}

		// Check for a lockfile.  If it exists, but is over an hour old, it's stale.  Ignore it.
		$lockfile = 'store/[data]/cron';
		if((file_exists($lockfile)) && (filemtime($lockfile) > (time() - 3600)) 
			&& (! get_config('system','override_cron_lockfile'))) {
			logger("cron: Already running");
			return;
		}
	
		// Create a lockfile.  Needs two vars, but $x doesn't need to contain anything.
		file_put_contents($lockfile, $x);

		logger('cron: start');
	
		// run queue delivery process in the background

		Master::Summon(array('Queue'));

		Master::Summon(array('Poller'));

		// maintenance for mod sharedwithme - check for updated items and remove them

		require_once('include/sharedwithme.php');
		apply_updates();
	

		// expire any expired mail

		q("delete from mail where expires != '%s' and expires < %s ",
			dbesc(NULL_DATE),
			db_utcnow()
		);

		// expire any expired items

		$r = q("select id from item where expires != '%s' and expires < %s 
			and item_deleted = 0 ",
			dbesc(NULL_DATE),
			db_utcnow()
		);
		if($r) {
			require_once('include/items.php');
			foreach($r as $rr)
				drop_item($rr['id'],false);
		}


		// Ensure that every channel pings a directory server once a month. This way we can discover
		// channels and sites that quietly vanished and prevent the directory from accumulating stale
		// or dead entries.

		$r = q("select channel_id from channel where channel_dirdate < %s - INTERVAL %s",
			db_utcnow(), 
			db_quoteinterval('30 DAY')
		);
		if($r) {
			foreach($r as $rr) {
				Master::Summon(array('Directory',$rr['channel_id'],'force'));
				if($interval)
					@time_sleep_until(microtime(true) + (float) $interval);
			}
		}

		// publish any applicable items that were set to be published in the future
		// (time travel posts). Restrict to items that have come of age in the last
		// couple of days to limit the query to something reasonable. 

		$r = q("select id from item where item_delayed = 1 and created <= %s  and created > '%s' ",
			db_utcnow(),
			dbesc(datetime_convert('UTC','UTC','now - 2 days'))
		);
		if($r) {
			foreach($r as $rr) {
				$x = q("update item set item_delayed = 0 where id = %d",
					intval($rr['id'])
				);
				if($x) {
					Master::Summon(array('Notifier','wall-new',$rr['id']));
				}
			}
		}

		$abandon_days = intval(get_config('system','account_abandon_days'));
		if($abandon_days < 1)
			$abandon_days = 0;

	
		// once daily run birthday_updates and then expire in background

		// FIXME: add birthday updates, both locally and for xprof for use
		// by directory servers

		$d1 = intval(get_config('system','last_expire_day'));
		$d2 = intval(datetime_convert('UTC','UTC','now','d'));

		// Allow somebody to staggger daily activities if they have more than one site on their server,
		// or if it happens at an inconvenient (busy) hour.

		$h1 = intval(get_config('system','cron_hour'));
		$h2 = intval(datetime_convert('UTC','UTC','now','G'));


		if(($d2 != $d1) && ($h1 == $h2)) {
			Master::Summon(array('Cron_daily'));
		}

		// update any photos which didn't get imported properly
		// This should be rare

		$r = q("select xchan_photo_l, xchan_hash from xchan where xchan_photo_l != '' and xchan_photo_m = '' 
			and xchan_photo_date < %s - INTERVAL %s",
			db_utcnow(), 
			db_quoteinterval('1 DAY')
		);
		if($r) {
			require_once('include/photo/photo_driver.php');
			foreach($r as $rr) {
				$photos = import_xchan_photo($rr['xchan_photo_l'],$rr['xchan_hash']);
				$x = q("update xchan set xchan_photo_l = '%s', xchan_photo_m = '%s', xchan_photo_s = '%s', xchan_photo_mimetype = '%s'
					where xchan_hash = '%s'",
					dbesc($photos[0]),
					dbesc($photos[1]),
					dbesc($photos[2]),
					dbesc($photos[3]),
					dbesc($rr['xchan_hash'])
				);
			}
		}


		// pull in some public posts

		if(! get_config('system','disable_discover_tab'))
			Master::Summon(array('Externals'));

		$generation = 0;

		$restart    = false;

		if(($argc > 1) && ($argv[1] == 'restart')) {
			$restart = true;
			$generation = intval($argv[2]);
			if(! $generation)
				killme();		
		}

		reload_plugins();

		$d = datetime_convert();

		// TODO check to see if there are any cronhooks before wasting a process

		if(! $restart)
			Master::Summon(array('Cronhooks'));

		set_config('system','lastcron',datetime_convert());

		//All done - clear the lockfile	
		@unlink($lockfile);

		return;
	}
}