<?php /** @file */

namespace Zotlabs\Daemon;

class Poller {

	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. Poller deferred to next scheduled run.');
				return;
			}
		}

		$interval = intval(get_config('system','poll_interval'));
		if(! $interval) 
			$interval = ((get_config('system','delivery_interval') === false) ? 3 : intval(get_config('system','delivery_interval')));

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

		logger('poller: start');
	
		$manual_id  = 0;
		$generation = 0;

		$force      = false;
		$restart    = false;

		if(($argc > 1) && ($argv[1] == 'force'))
			$force = true;

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

		if(($argc > 1) && intval($argv[1])) {
			$manual_id = intval($argv[1]);
			$force     = true;
		}

		$sql_extra = (($manual_id) ? " AND abook_id = " . intval($manual_id) . " " : "");

		reload_plugins();

		$d = datetime_convert();

		// Only poll from those with suitable relationships

		$abandon_sql = (($abandon_days) 
			? sprintf(" AND account_lastlog > %s - INTERVAL %s ", db_utcnow(), db_quoteinterval(intval($abandon_days).' DAY')) 
			: '' 
		);

		$randfunc = db_getfunc('RAND');
	
		$contacts = q("SELECT abook.abook_updated, abook.abook_connected, abook.abook_feed,
			abook.abook_channel, abook.abook_id, abook.abook_archived, abook.abook_pending,
			abook.abook_ignored, abook.abook_blocked,
			xchan.xchan_network,
			account.account_lastlog, account.account_flags 
			FROM abook LEFT JOIN xchan on abook_xchan = xchan_hash 
			LEFT JOIN account on abook_account = account_id
			where abook_self = 0
			$sql_extra 
			AND (( account_flags = %d ) OR ( account_flags = %d )) $abandon_sql ORDER BY $randfunc",
			intval(ACCOUNT_OK),
			intval(ACCOUNT_UNVERIFIED)     // FIXME
		);

		if($contacts) {
			foreach($contacts as $contact) {

				$update  = false;

				$t = $contact['abook_updated'];
				$c = $contact['abook_connected'];

				if(intval($contact['abook_feed'])) {
					$min = service_class_fetch($contact['abook_channel'],'minimum_feedcheck_minutes');
					if(! $min)
						$min = intval(get_config('system','minimum_feedcheck_minutes'));
					if(! $min)
						$min = 60;
					$x = datetime_convert('UTC','UTC',"now - $min minutes");
					if($c < $x) {
						Master::Summon(array('Onepoll',$contact['abook_id']));
						if($interval)
							@time_sleep_until(microtime(true) + (float) $interval);
					}
					continue;
				}


				if(! in_array($contact['xchan_network'],['zot','zot6']))
					continue;

				if($c == $t) {
					if(datetime_convert('UTC','UTC', 'now') > datetime_convert('UTC','UTC', $t . " + 1 day"))
						$update = true;
				}
				else {
	
					// if we've never connected with them, start the mark for death countdown from now
	
					if($c <= NULL_DATE) {
						$r = q("update abook set abook_connected = '%s'  where abook_id = %d",
							dbesc(datetime_convert()),
							intval($contact['abook_id'])
						);
						$c = datetime_convert();
						$update = true;
					}

					// He's dead, Jim

					if(strcmp(datetime_convert('UTC','UTC', 'now'),datetime_convert('UTC','UTC', $c . " + 30 day")) > 0) {	
						$r = q("update abook set abook_archived = 1 where abook_id = %d",
							intval($contact['abook_id'])
						);
						$update = false;
						continue;
					}

					if(intval($contact['abook_archived'])) {
						$update = false;
						continue;
					}

					// might be dead, so maybe don't poll quite so often
	
					// recently deceased, so keep up the regular schedule for 3 days
 
					if((strcmp(datetime_convert('UTC','UTC', 'now'),datetime_convert('UTC','UTC', $c . " + 3 day")) > 0)
					 && (strcmp(datetime_convert('UTC','UTC', 'now'),datetime_convert('UTC','UTC', $t . " + 1 day")) > 0))
						$update = true;

					// After that back off and put them on a morphine drip

					if(strcmp(datetime_convert('UTC','UTC', 'now'),datetime_convert('UTC','UTC', $t . " + 2 day")) > 0) {	
						$update = true;
					}

				}

				if(intval($contact['abook_pending']) || intval($contact['abook_archived']) || intval($contact['abook_ignored']) || intval($contact['abook_blocked']))
					continue;

				if((! $update) && (! $force))
						continue;

				Master::Summon(array('Onepoll',$contact['abook_id']));
				if($interval)
					@time_sleep_until(microtime(true) + (float) $interval);

			}
		}

		$dirmode = intval(get_config('system', 'directory_mode'));

		if($dirmode == DIRECTORY_MODE_SECONDARY || $dirmode == DIRECTORY_MODE_PRIMARY) {
			$r = q("SELECT u.ud_addr, u.ud_id, u.ud_last FROM updates AS u INNER JOIN (SELECT ud_addr, max(ud_id) AS ud_id FROM updates WHERE ( ud_flags & %d ) = 0 AND ud_addr != '' AND ( ud_last <= '%s' OR ud_last > %s - INTERVAL %s ) GROUP BY ud_addr) AS s ON s.ud_id = u.ud_id ",
				intval(UPDATE_FLAGS_UPDATED),
				dbesc(NULL_DATE),
				db_utcnow(), db_quoteinterval('7 DAY')
			);
			if($r) {
				foreach($r as $rr) {

					// If they didn't respond when we attempted before, back off to once a day
					// After 7 days we won't bother anymore

					if($rr['ud_last'] > NULL_DATE)
						if($rr['ud_last'] > datetime_convert('UTC','UTC', 'now - 1 day'))
							continue;
					Master::Summon(array('Onedirsync',$rr['ud_id']));
					if($interval)
						@time_sleep_until(microtime(true) + (float) $interval);
				}
			}
		}	

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

		//All done - clear the lockfile	

		@unlink($lockfile);

		return;
	}
}