mirror of
https://github.com/EGroupware/egroupware.git
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467 lines
16 KiB
PHP
467 lines
16 KiB
PHP
<?php
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/**
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* API - Interapplicaton links BO layer
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*
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* Links have two ends each pointing to an entry, each entry is a double:
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* - app app-name or directory-name of an egw application, eg. 'infolog'
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* - id this is the id, eg. an integer or a tupple like '0:INBOX:1234'
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright 2001-2014 by RalfBecker@outdoor-training.de
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage link
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* @version $Id$
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*/
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/**
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* generalized linking between entries of eGroupware apps - SO layer
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*
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* All vars passed to this class get correct escaped to prevent query insertion.
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*
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* All methods are now static!
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*/
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class solink
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{
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/**
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* Name of the links table
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*/
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const TABLE = 'egw_links';
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/**
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* Turns on debug-messages
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*/
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const DEBUG = false;
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/**
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* Reference to the global db-class
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*
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* @var egw_db
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*/
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private static $db;
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/**
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* True if call to get_links or get_3links exceeded limit (contains not all rows)
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*/
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public static $limit_exceeded = false;
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/**
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* creats a link between $app1,$id1 and $app2,$id2
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*
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* @param string $app1 appname of 1. endpoint of the link
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* @param string $id1 id in $app1
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* @param string $app2 appname of 2. endpoint of the link
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* @param string $id2 id in $app2
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* @param string $remark='' Remark to be saved with the link (defaults to '')
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* @param int $owner=0 Owner of the link (defaults to user)
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* @param int $lastmod=0 timestamp of last modification (defaults to now=time())
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* @return int/boolean False (for db or param-error) or on success link_id (Please not the return-value of $id1)
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*/
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static function link( $app1,&$id1,$app2,$id2='',$remark='',$owner=0,$lastmod=0 )
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{
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if (self::DEBUG)
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{
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echo "<p>solink.link('$app1',$id1,'$app2',$id2,'$remark',$owner)</p>\n";
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}
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if ($app1 == $app2 && $id1 == $id2 ||
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$id1 == '' || $id2 == '' || $app1 == '' || $app2 == '')
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{
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return False; // dont link to self or other nosense
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}
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if (($link = self::get_link($app1,$id1,$app2,$id2)))
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{
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if ($link['link_remark'] != $remark)
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{
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self::update_remark($link['link_id'],$remark);
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}
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return $link['link_id']; // link alread exist
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}
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if (!$owner)
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{
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$owner = $GLOBALS['egw_info']['user']['account_id'];
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}
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return self::$db->insert(self::TABLE,array(
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'link_app1' => $app1,
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'link_id1' => $id1,
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'link_app2' => $app2,
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'link_id2' => $id2,
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'link_remark' => $remark,
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'link_lastmod' => $lastmod ? $lastmod : time(),
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'link_owner' => $owner,
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),False,__LINE__,__FILE__) ? self::$db->get_last_insert_id(self::TABLE,'link_id') : false;
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}
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/**
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* update the remark of a link
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*
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* @param int $link_id link to update
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* @param string $remark new text for the remark
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* @return boolean true on success, else false
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*/
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static function update_remark($link_id,$remark)
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{
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return self::$db->update(self::TABLE,array(
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'link_remark' => $remark,
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'link_lastmod' => time(),
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),array(
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'link_id' => $link_id,
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),__LINE__,__FILE__);
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}
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/**
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* returns array of links to $app,$id
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*
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* @param string $app appname
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* @param string|array $id id(s) in $app
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* @param string $only_app='' if set return only links from $only_app (eg. only addressbook-entries) or NOT from if $only_app[0]=='!'
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* @param string $order='link_lastmod DESC' defaults to newest links first
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* @param boolean $deleted=false Include links that have been flagged as deleted, waiting for purge of linked record.
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* @param int|array $limit=null number of entries to return, default null = all or array(offset, num_rows) to return num_rows starting from offset
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* @return array id => links pairs if $id is an array or just the links (only_app: ids) or empty array if no matching links found
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*/
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static function get_links($app, $id, $only_app='', $order='link_lastmod DESC', $deleted=false, $limit=null)
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{
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if (self::DEBUG)
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{
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echo "<p>solink.get_links($app,".print_r($id,true).",$only_app,$order,$deleted)</p>\n";
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}
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if (($not_only = $only_app[0] == '!'))
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{
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$only_app = substr($only_app,1);
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}
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$offset = false;
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if (is_array($limit))
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{
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list($offset, $limit) = $limit;
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}
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elseif($limit)
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{
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$offset = 0;
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}
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$links = array();
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foreach(self::$db->select(self::TABLE, '*', self::$db->expression(self::TABLE, '((', array(
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'link_app1' => $app,
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'link_id1' => $id,
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),') OR (',array(
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'link_app2' => $app,
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'link_id2' => $id,
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),'))',
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$deleted ? '' : ' AND deleted IS NULL'
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), __LINE__, __FILE__, $offset, $order ? " ORDER BY $order" : '', 'phpgwapi', $limit) as $row)
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{
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// check if left side (1) is one of our targets --> add it
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if ($row['link_app1'] == $app && in_array($row['link_id1'],(array)$id))
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{
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self::_add2links($row,true,$only_app,$not_only,$links);
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}
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// check if right side (2) is one of our targets --> add it (both can be true for multiple targets!)
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if ($row['link_app2'] == $app && in_array($row['link_id2'],(array)$id))
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{
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self::_add2links($row,false,$only_app,$not_only,$links);
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}
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}
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// if query returns exactly limit rows, we assume there are more and therefore set self::$limit_exceeded
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self::$limit_exceeded = $offset !== false && count(is_array($id) ? $links : $links[$id]) == $limit;
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return is_array($id) ? $links : ($links[$id] ? $links[$id] : array());
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}
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private function _add2links($row,$left,$only_app,$not_only,array &$links)
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{
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$linked_app = $left ? $row['link_app2'] : $row['link_app1'];
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$linked_id = $left ? $row['link_id2'] : $row['link_id1'];
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$app_id = $left ? $row['link_id1'] : $row['link_id2'];
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list($app) = explode('-',$linked_app);
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if ($only_app && $not_only == ($linked_app == $only_app) || !$GLOBALS['egw_info']['user']['apps'][$app])
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{
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#echo "$linked_app == $only_app, ";var_dump($linked_app == $only_app);echo " ->dont return a link<br>";
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return;
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}
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#echo "returning ".(($only_app && !$not_only) ? " linkid:".$linked_id : " full array with linkid $linked_id")."<br>";
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$links[$app_id][$row['link_id']] = ($only_app && !$not_only) ? $linked_id : array(
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'app' => $linked_app,
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'id' => $linked_id,
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'remark' => $row['link_remark'],
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'owner' => $row['link_owner'],
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'lastmod' => $row['link_lastmod'],
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'link_id' => $row['link_id'],
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'deleted' => $row['deleted'],
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);
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}
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/**
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* returns data of a link
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*
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* @param ing/string $app_link_id > 0 link_id of link or app-name of link
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* @param string $id='' id in $app, if no integer link_id given in $app_link_id
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* @param string $app2='' appname of 2. endpoint of the link, if no integer link_id given in $app_link_id
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* @param string $id2='' id in $app2, if no integer link_id given in $app_link_id
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* @return array with link-data or False
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*/
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static function get_link($app_link_id,$id='',$app2='',$id2='')
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{
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if (self::DEBUG)
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{
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echo "<p>solink.get_link('$app_link_id',$id,'$app2','$id2')</p>\n";
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}
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if ((int) $app_link_id > 0)
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{
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$where = array('link_id' => $app_link_id);
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}
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else
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{
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if ($app_link_id == '' || $id == '' || $app2 == '' || $id2 == '')
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{
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return False;
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}
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$where = self::$db->expression(self::TABLE,'(',array(
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'link_app1' => $app_link_id,
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'link_id1' => $id,
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'link_app2' => $app2,
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'link_id2' => $id2,
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),') OR (',array(
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'link_app2' => $app_link_id,
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'link_id2' => $id,
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'link_app1' => $app2,
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'link_id1' => $id2,
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),')');
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}
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foreach(self::$db->select(self::TABLE,'*',$where,__LINE__,__FILE__) as $row)
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{
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if (self::DEBUG)
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{
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_debug_array($row);
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}
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return $row;
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}
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return False;
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}
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/**
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* Remove link with $link_id or all links matching given params
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*
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* @param $link_id link-id to remove if > 0
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* @param string $app='' app-name of links to remove
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* @param string $id='' id in $app or '' remove all links from $app
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* @param int $owner=0 account_id to delete all links of a given owner, or 0
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* @param string $app2='' appname of 2. endpoint of the link
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* @param string $id2='' id in $app2
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* @param boolean $hold_for_purge Don't really delete the link, just mark it as deleted and wait for final delete of linked entry
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* @return array with deleted links
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*/
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static function unlink($link_id,$app='',$id='',$owner=0,$app2='',$id2='',$hold_for_purge=false)
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{
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if (self::DEBUG)
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{
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echo "<p>solink.unlink($link_id,$app,$id,$owner,$app2,$id2)</p>\n";
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}
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if ((int)$link_id > 0)
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{
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$where = array('link_id' => $link_id);
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}
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elseif ($app == '' AND $owner == '')
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{
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return 0;
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}
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else
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{
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if ($app != '' && $app2 == '')
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{
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$check1 = array('link_app1' => $app);
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$check2 = array('link_app2' => $app);
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if ($id != '')
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{
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$check1['link_id1'] = $id;
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$check2['link_id2'] = $id;
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}
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$where = self::$db->expression(self::TABLE,'((',$check1,') OR (',$check2,'))');
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}
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elseif ($app != '' && $app2 != '')
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{
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$where = self::$db->expression(self::TABLE,'(',array(
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'link_app1' => $app,
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'link_id1' => $id,
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'link_app2' => $app2,
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'link_id2' => $id2,
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),') OR (',array(
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'link_app1' => $app2,
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'link_id1' => $id2,
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'link_app2' => $app,
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'link_id2' => $id,
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),')');
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}
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if ($owner)
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{
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if ($app) $where = array($where);
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$where['link_owner'] = $owner;
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}
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}
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$deleted = array();
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foreach(self::$db->select(self::TABLE,'*',$where,__LINE__,__FILE__) as $row)
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{
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$deleted[] = $row;
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}
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if($hold_for_purge)
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{
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self::$db->update(self::TABLE,array(
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'deleted' => time(),
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'link_lastmod' => time(),
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), $where, __LINE__,__FILE__);
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}
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else
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{
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self::$db->delete(self::TABLE,$where,__LINE__,__FILE__);
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}
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return $deleted;
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}
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/**
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* Restore links being held as deleted waiting for purge of linked record (un-delete)
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*
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* @param string $app='' app-name of links to remove
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* @param string $id='' id in $app or '' remove all links from $app
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*/
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static function restore($app, $id)
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{
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if (self::DEBUG)
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{
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echo "<p>solink.restore($app,$id)</p>\n";
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}
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if ($app == '')
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{
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return 0;
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}
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$check1 = array('link_app1' => $app);
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$check2 = array('link_app2' => $app);
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if ($id != '')
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{
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$check1['link_id1'] = $id;
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$check2['link_id2'] = $id;
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}
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$where = self::$db->expression(self::TABLE,'((',$check1,') OR (',$check2,'))');
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self::$db->update(self::TABLE,array('deleted'=> null), $where, __LINE__,__FILE__);
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}
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/**
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* Changes ownership of all links from $owner to $new_owner
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*
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* This is needed when a user/account gets deleted
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* Does NOT change the modification-time
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*
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* @param int $owner acount_id of owner to change
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* @param int $new_owner account_id of new owner
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* @return int number of links changed
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*/
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static function chown($owner,$new_owner)
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{
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if ((int)$owner <= 0 || (int) $new_owner <= 0)
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{
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return 0;
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}
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self::$db->update(self::TABLE,array('owner'=>$new_owner),array('owner'=>$owner),__LINE__,__FILE__);
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return self::$db->affected_rows();
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}
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/**
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* Get all links from a given app's entries to an other app's entries, which both link to the same 3. app and id
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*
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* Example:
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* I search all timesheet's linked to a given project and id(s), who are also linked to other entries,
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* which link to the same project:
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*
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* ($app='timesheet'/some id) <--a--> (other app/other id) <--b--> ($t_app='projectmanager'/$t_id=$pm_id)
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* ^ ^
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* +---------------------------c-----------------------------------------+
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*
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* egw_link::get_3links('timesheet','projectmanager',$pm_id) returns the links (c) between the timesheet and the project,
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* plus the other app/id in the keys 'app3' and 'id3'
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*
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* @param string $app app the returned links are linked on one side (atm. this must be link_app1!)
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* @param string $target_app app the returned links other side link also to
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* @param string|array $target_id=null id(s) the returned links other side link also to
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* @param boolean $just_app_ids=false return array with link_id => app_id pairs, not the full link record
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* @param string $order='link_lastmod DESC' defaults to newest links first
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* @param int|array $limit=null number of entries to return, default null = all or array(offset, num_rows) to return num_rows starting from offset
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* @return array with links from entries from $app to $target_app/$target_id plus the other (b) link_id/app/id in the keys 'link3'/'app3'/'id3'
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*/
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static function get_3links($app, $target_app, $target_id=null, $just_app_ids=false, $order='link_lastmod DESC', $limit=null)
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{
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$table = self::TABLE;
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$arrayofselects=array(
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// retrieve the type of links, where the relation is realized as timesheet->infolog/tracker via infolog->projectmanager to timesheet->projectmanager
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array('table'=>self::TABLE,
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'cols'=>'c.*,b.link_app1 AS app3,b.link_id1 AS id3,b.link_id AS link3',
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'where'=>'a.link_app1='.self::$db->quote($app).' AND c.link_app2='.self::$db->quote($target_app).
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(!$target_id ? '' : self::$db->expression(self::TABLE,' AND c.',array('link_id2' => $target_id))),
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'join'=>" a
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JOIN $table b ON a.link_id2=b.link_id1 AND a.link_app2=b.link_app1
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JOIN $table c ON a.link_id1=c.link_id1 AND a.link_app1=c.link_app1 AND a.link_id!=c.link_id AND c.link_app2=b.link_app2 AND c.link_id2=b.link_id2",
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),
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// retrieve the type of links, where the relation is realized as timesheet->infolog/tracker and projectmanager->timesheet
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array('table'=>self::TABLE,
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'cols'=>'b.link_id, b.link_app2 as app1, b.link_id2 as id1, b.link_app1 as app2, b.link_id1 as id2, b.link_remark,b.link_lastmod,b.link_owner,b.deleted,c.link_app1 AS app3,c.link_id1 AS id3,c.link_id AS link3',
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'where'=>'a.link_app1='.self::$db->quote($app).' AND b.link_app1='.self::$db->quote($target_app).
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(!$target_id ? '' : self::$db->expression(self::TABLE,' AND b.',array('link_id1' => $target_id))),
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'join'=>" a
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JOIN $table b ON a.link_id1=b.link_id2 AND a.link_app1=b.link_app2
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JOIN $table c ON a.link_id2=c.link_id1 AND a.link_app2=c.link_app1 AND a.link_id!=c.link_id AND c.link_app2=b.link_app1 AND c.link_id2=b.link_id1",
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),
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// retrieve the type of links, where the relation is realized as timesheet->projectmanager and infolog->timesheet
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array('table'=>self::TABLE,
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'cols'=>'a.*,c.link_app1 AS app3,c.link_id1 AS id3,c.link_id AS link3',
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'where'=>'a.link_app1='.self::$db->quote($app).' AND a.link_app2='.self::$db->quote($target_app).
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(!$target_id ? '' : self::$db->expression(self::TABLE,' AND a.',array('link_id2' => $target_id))),
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'join'=>" a
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JOIN $table b ON a.link_id1=b.link_id2 AND a.link_app1=b.link_app2
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JOIN $table c ON a.link_id2=c.link_id2 AND a.link_app2=c.link_app2 AND a.link_id!=c.link_id AND c.link_app1=b.link_app1 AND c.link_id1=b.link_id1",
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),
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);
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$offset = false;
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if (is_array($limit))
|
|
{
|
|
list($offset, $limit) = $limit;
|
|
}
|
|
elseif($limit)
|
|
{
|
|
$offset = 0;
|
|
}
|
|
|
|
$links = array();
|
|
foreach(self::$db->union($arrayofselects, __LINE__, __FILE__, $order, $offset, $limit) as $row)
|
|
{
|
|
if ($just_app_ids)
|
|
{
|
|
if ($row['link_app1'] == $target_app && (is_null($target_id) || in_array($row['link_id1'],(array)$target_id)))
|
|
{
|
|
$links[$row['link_id']] = $row['link_id2'];
|
|
}
|
|
else
|
|
{
|
|
$links[$row['link_id']] = $row['link_id1'];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$links[] = egw_db::strip_array_keys($row,'link_');
|
|
}
|
|
}
|
|
// if query returns exactly limit rows, we assume there are more and therefore set self::$limit_exceeded
|
|
self::$limit_exceeded = $offset !== false && count($links) == $limit;
|
|
|
|
return $links;
|
|
}
|
|
|
|
/**
|
|
* Initialise our static vars
|
|
*/
|
|
static function init_static( )
|
|
{
|
|
self::$db = $GLOBALS['egw']->db;
|
|
}
|
|
}
|
|
solink::init_static();
|