<?php

require_once('include/datetime.php');


/*
 * poco_load
 *
 * Given a contact-id (minimum), load the PortableContacts friend list for that contact,
 * and add the entries to the gcontact (Global Contact) table, or update existing entries
 * if anything (name or photo) has changed.
 * We use normalised urls for comparison which ignore http vs https and www.domain vs domain
 *
 * Once the global contact is stored add (if necessary) the contact linkage which associates
 * the given uid, cid to the global contact entry. There can be many uid/cid combinations
 * pointing to the same global contact id. 
 *
 */
 

function poco_load($cid,$uid = 0,$zcid = 0,$url = null) {
	$a = get_app();

	if($cid) {
		if((! $url) || (! $uid)) {
			$r = q("select `poco`, `uid` from `contact` where `id` = %d limit 1",
				intval($cid)
			);
			if(count($r)) {
				$url = $r[0]['poco'];
				$uid = $r[0]['uid'];
			}
		}
		if(! $uid)
			return;
	}

	if(! $url)
		return;

	$url = $url . (($uid) ? '/@me/@all?fields=displayName,urls,photos' : '?fields=displayName,urls,photos') ;

	logger('poco_load: ' . $url, LOGGER_DEBUG);

	$s = fetch_url($url);

	logger('poco_load: returns ' . $s, LOGGER_DATA);

	logger('poco_load: return code: ' . $a->get_curl_code(), LOGGER_DEBUG);

	if(($a->get_curl_code() > 299) || (! $s))
		return;

	$j = json_decode($s);

	logger('poco_load: json: ' . print_r($j,true),LOGGER_DATA);

	if(! isset($j->entry))
		return;

	$total = 0;
	foreach($j->entry as $entry) {

		$total ++;
		$profile_url = '';
		$profile_photo = '';
		$connect_url = '';
		$name = '';

		$name = $entry->displayName;

		foreach($entry->urls as $url) {
			if($url->type == 'profile') {
				$profile_url = $url->value;
				continue;
			}
			if($url->type == 'webfinger') {
				$connect_url = str_replace('acct:' , '', $url->value);
				continue;
			}
		} 
		foreach($entry->photos as $photo) {
			if($photo->type == 'profile') {
				$profile_photo = $photo->value;
				continue;
			}
		}

		if((! $name) || (! $profile_url) || (! $profile_photo))
			continue; 
		 
		$x = q("select * from `gcontact` where `nurl` = '%s' limit 1",
			dbesc(normalise_link($profile_url))
		);

		if(count($x)) {
			$gcid = $x[0]['id'];

			if($x[0]['name'] != $name || $x[0]['photo'] != $profile_photo) {
				q("update gcontact set `name` = '%s', `photo` = '%s', `connect` = '%s' 
					where `nurl` = '%s' limit 1",
					dbesc($name),
					dbesc($profile_photo),
					dbesc($connect_url),
					dbesc(normalise_link($profile_url))
				);
			}
		}
		else {
			q("insert into `gcontact` (`name`,`url`,`nurl`,`photo`,`connect`)
				values ( '%s', '%s', '%s', '%s','%s') ",
				dbesc($name),
				dbesc($profile_url),
				dbesc(normalise_link($profile_url)),
				dbesc($profile_photo),
				dbesc($connect_url)
			);
			$x = q("select * from `gcontact` where `nurl` = '%s' limit 1",
				dbesc(normalise_link($profile_url))
			);
			if(count($x))
				$gcid = $x[0]['id'];
		}
		if(! $gcid)
			return;

		$r = q("select * from glink where `cid` = %d and `uid` = %d and `gcid` = %d and `zcid` = %d limit 1",
			intval($cid),
			intval($uid),
			intval($gcid),
			intval($zcid)
		);
		if(! count($r)) {
			q("insert into glink ( `cid`,`uid`,`gcid`,`zcid`, `updated`) values (%d,%d,%d,%d, '%s') ",
				intval($cid),
				intval($uid),
				intval($gcid),
				intval($zcid),
				dbesc(datetime_convert())
			);
		}
		else {
			q("update glink set updated = '%s' where `cid` = %d and `uid` = %d and `gcid` = %d and zcid = %d limit 1",
				dbesc(datetime_convert()),
				intval($cid),
				intval($uid),
				intval($gcid),
				intval($zcid)
			);
		}

	}
	logger("poco_load: loaded $total entries",LOGGER_DEBUG);

	q("delete from glink where `cid` = %d and `uid` = %d and `zcid` = %d and `updated` < UTC_TIMESTAMP - INTERVAL 2 DAY",
		intval($cid),
		intval($uid),
		intval($zcid)
	);

}


function count_common_friends($uid,$cid) {

	$r = q("SELECT count(*) as `total`
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`cid` = %d and `glink`.`uid` = %d
		and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and id != %d ) ",
		intval($cid),
		intval($uid),
		intval($uid),
		intval($cid)
	);

	if(count($r))
		return $r[0]['total'];
	return 0;

}


function common_friends($uid,$cid,$limit=9999) {

	$r = q("SELECT `gcontact`.* 
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`cid` = %d and `glink`.`uid` = %d
		and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 and id != %d ) 
		order by `gcontact`.`name` asc limit 0, %d",
		intval($cid),
		intval($uid),
		intval($uid),
		intval($cid),
		intval($limit)
	);

	return $r;

}


function count_common_friends_zcid($uid,$zcid) {

	$r = q("SELECT count(*) as `total` 
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`zcid` = %d
		and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 ) ",
		intval($zcid),
		intval($uid)
	);

	if(count($r))
		return $r[0]['total'];
	return 0;

}

function common_friends_zcid($uid,$zcid,$limit = 6) {

	$r = q("SELECT `gcontact`.* 
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`zcid` = %d
		and `gcontact`.`nurl` in (select nurl from contact where uid = %d and self = 0 ) 
		order by `gcontact`.`name` asc limit 0, %d",
		intval($zcid),
		intval($uid),
		intval($limit)
	);

	return $r;

}


function count_all_friends($uid,$cid) {

	$r = q("SELECT count(*) as `total`
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`cid` = %d and `glink`.`uid` = %d ",
		intval($cid),
		intval($uid)
	);

	if(count($r))
		return $r[0]['total'];
	return 0;

}


function all_friends($uid,$cid,$start = 0, $limit = 80) {

	$r = q("SELECT `gcontact`.* 
		FROM `glink` left join `gcontact` on `glink`.`gcid` = `gcontact`.`id`
		where `glink`.`cid` = %d and `glink`.`uid` = %d 
		order by `gcontact`.`name` asc LIMIT %d, %d ",
		intval($cid),
		intval($uid),
		intval($start),
		intval($limit)
	);

	return $r;
}


function suggestion_query($uid, $start = 0, $limit = 80) {

	if(! $uid)
		return array();

	$r = q("SELECT count(glink.gcid) as `total`, gcontact.* from gcontact 
		left join glink on glink.gcid = gcontact.id 
		where uid = %d and not gcontact.nurl in ( select nurl from contact where uid = %d )
		and not gcontact.name in ( select name from contact where uid = %d )
		and not gcontact.id in ( select gcid from gcign where uid = %d )
		group by glink.gcid order by total desc limit %d, %d ",
		intval($uid),
		intval($uid),
		intval($uid),
		intval($uid),
		intval($start),
		intval($limit)
	);

	if(count($r) && count($r) >= ($limit -1))
		return $r;

	$r2 = q("SELECT gcontact.* from gcontact 
		left join glink on glink.gcid = gcontact.id 
		where glink.uid = 0 and glink.cid = 0 and glink.zcid = 0 and not gcontact.nurl in ( select nurl from contact where uid = %d )
		and not gcontact.name in ( select name from contact where uid = %d )
		and not gcontact.id in ( select gcid from gcign where uid = %d )
		order by rand() limit %d, %d ",
		intval($uid),
		intval($uid),
		intval($uid),
		intval($start),
		intval($limit)
	);


	return array_merge($r,$r2);

}

function update_suggestions() {

	$a = get_app();

	$done = array();

	poco_load(0,0,0,$a->get_baseurl() . '/poco');

	$done[] = $a->get_baseurl() . '/poco';

	if(strlen(get_config('system','directory_submit_url'))) {
		$x = fetch_url('http://dir.friendica.com/pubsites');
		if($x) {
			$j = json_decode($x);
			if($j->entries) {
				foreach($j->entries as $entry) {
					$url = $entry->url . '/poco';
					if(! in_array($url,$done))
						poco_load(0,0,0,$entry->url . '/poco');
				}
			}
		}
	}

	$r = q("select distinct(poco) as poco from contact where network = '%s'",
		dbesc(NETWORK_DFRN)
	);

	if(count($r)) {
		foreach($r as $rr) {
			$base = substr($rr['poco'],0,strrpos($rr['poco'],'/'));
			if(! in_array($base,$done))
				poco_load(0,0,0,$base);
		}
	}
}