forked from extern/egroupware
320 lines
9.2 KiB
PHP
320 lines
9.2 KiB
PHP
<?php
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/**************************************************************************\
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* eGroupWare - InfoLog Links *
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* http://www.egroupware.org *
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* Written by Ralf Becker <RalfBecker@outdoor-training.de> *
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* -------------------------------------------- *
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* This program is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU General Public License as published by the *
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* Free Software Foundation; either version 2 of the License, or (at your *
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* option) any later version. *
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\**************************************************************************/
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/* $Id$ */
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/**
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* generalized linking between entries of eGroupware apps - BO layer
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*
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* This class is the SO-layer of the links
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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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* All vars passed to this class get correct escaped to prevent query insertion.
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*
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* @package infolog
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* @subpackage link
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* @author RalfBecker-At-outdoor-training.de
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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*/
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class solink
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{
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var $db;
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var $user;
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var $link_table = 'egw_links';
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var $debug;
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/**
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* constructor
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*/
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function solink( )
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{
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$this->db = clone($GLOBALS['egw']->db);
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$this->db->set_app('infolog');
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$this->user = $GLOBALS['egw_info']['user']['account_id'];
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}
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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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* @return boolean/int False (for db or param-error) or link_id for success
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*/
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function link( $app1,$id1,$app2,$id2,$remark='',$owner=0,$lastmod=0 )
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{
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if ($this->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 = $this->get_link($app1,$id1,$app2,$id2))
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{
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if ($link['link_remark'] != $remark)
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{
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$this->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 = $this->user;
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}
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return $this->db->insert($this->link_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__) ? $this->db->get_last_insert_id($this->link_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 $remark new text for the remark
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* @return boolean true on success, else false
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*/
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function update_remark($link_id,$remark)
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{
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return $this->db->update($this->link_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 $id id 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 defaults to newest links first
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* @return array of links (only_app: ids) or empty array if no matching links found
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*/
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function get_links( $app,$id,$only_app='',$order='link_lastmod DESC' )
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{
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if ($this->debug)
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{
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echo "<p>solink.get_links($app,$id,$only_app,$order)</p>\n";
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}
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$links = array();
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$this->db->select($this->link_table,'*',$this->db->expression($this->link_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' => $id,
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),')'
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),__LINE__,__FILE__,False,$order ? " ORDER BY $order" : '');
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$this->db->query($sql,__LINE__,__FILE__);
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if ($not_only = $only_app[0] == '!')
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{
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$only_app = substr($only_app,1);
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}
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while ($this->db->next_record())
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{
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$row = $this->db->Record;
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if ($row['link_app1'] == $app AND $row['link_id1'] == $id)
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{
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$link = array(
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'app' => $row['link_app2'],
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'id' => $row['link_id2']
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);
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}
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else
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{
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$link = array(
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'app' => $row['link_app1'],
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'id' => $row['link_id1']
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);
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}
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if ($only_app && $not_only == ($link['app'] == $only_app) ||
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!$GLOBALS['egw_info']['user']['apps'][$link['app']])
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{
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continue;
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}
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$link['remark'] = $row['link_remark'];
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$link['owner'] = $row['link_owner'];
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$link['lastmod'] = $row['link_lastmod'];
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$link['link_id'] = $row['link_id'];
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$links[$row['link_id']] = $only_app && !$not_only ? $link['id'] : $link;
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}
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return $links;
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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 $app_link_id
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* @return array with link-data or False
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*/
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function get_link($app_link_id,$id='',$app2='',$id2='')
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{
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if ($this->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 == '' || $id2 == '')
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{
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return False;
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}
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$vars2addslashes = array('app_link_id','id','app2','id2');
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foreach ($vars2addslashes as $var)
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{
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$$var = $this->db->db_addslashes($$var);
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}
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$where = $this->db->expression($this->link_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' => $id2,
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),')');
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}
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$this->db->select($this->link_table,'*',$where,__LINE__,__FILE__);
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if ($this->db->next_record())
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{
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if ($this->debug)
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{
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_debug_array($this->db->Record);
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}
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return $this->db->Record;
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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 $app2
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* @return array with deleted links
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*/
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function &unlink($link_id,$app='',$id='',$owner=0,$app2='',$id2='')
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{
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if ($this->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 = $this->db->expression($this->link_table,'((',$check1,') OR (',$check2,'))');
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}
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elseif ($app != '' && $app2 != '')
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{
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$where = $this->db->expression($this->link_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'] = $owner;
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}
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}
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$this->db->select($this->link_table,'*',$where,__LINE__,__FILE__);
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$deleted = array();
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while (($row = $this->db->row(true)))
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{
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$deleted[] = $row;
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}
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$this->db->delete($this->link_table,$where,__LINE__,__FILE__);
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return $deleted;
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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 $new_owner account_id of new owner
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* @return int number of links changed
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*/
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function chown($owner,$new_owner)
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{
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if ((int)$owner <= 0 || (int) $new_owner <= 0)
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{
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return 0;
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}
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$this->db->update($this->link_table,array('owner'=>$new_owner),array('owner'=>$owner),__LINE__,__FILE__);
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return $this->db->affected_rows();
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}
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}
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