forked from extern/egroupware
301 lines
8.6 KiB
PHP
301 lines
8.6 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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$GLOBALS['phpgw_info']['flags']['included_classes']['solink'] = True;
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/*!
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@class solink
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@author ralfbecker
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@copyright GPL - GNU General Public License
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@abstract generalized linking between entries of eGroupware apps - DB layer
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@discussion This class is to access the links in the DB<br>
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Links have to ends each pointing two an entry, each entry is a double:<br>
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app app-name or directory-name of an egw application, eg. 'infolog'<br>
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id this is the id, eg. an integer or a tupple like '0:INBOX:1234'
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@note All vars passed to this class are run either through addslashes or intval
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to prevent query insertion and to get pgSql 7.3 compatibility.
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*/
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class solink // DB-Layer
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{
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var $public_functions = array
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(
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'link' => True,
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'get_links' => True,
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'unlink' => True,
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'chown' => True,
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'get_link' => True
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);
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var $db;
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var $user;
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var $link_table = 'phpgw_links';
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var $debug;
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/*!
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@function solink
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@syntax solink( )
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@author ralfbecker
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@abstract constructor
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*/
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function solink( )
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{
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$this->db = $GLOBALS['phpgw']->db;
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$this->db->set_app('infolog');
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$this->user = $GLOBALS['phpgw_info']['user']['account_id'];
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}
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/*!
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@function link
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@syntax link( $app1,$id1,$app2,$id2,$remark='',$user=0 )
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@author ralfbecker
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@abstract creats a link between $app1,$id1 and $app2,$id2
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@param $remark Remark to be saved with the link (defaults to '')
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@param $owner Owner of the link (defaults to user)
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@discussion Does NOT check if link already exists
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@result 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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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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@function get_links
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@syntax get_links( $app,$id,$only_app='',$only_name='',$order='link_lastmod DESC' )
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@author ralfbecker
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@abstract returns array of links to $app,$id
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@param $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 $order defaults to newest links first
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@result 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['phpgw_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[] = $only_app && !$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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@function get_link
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@syntax get_link( $app_link_id,$id='',$app2='',$id2='' )
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@author ralfbecker
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@abstract returns data of a link
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@param $app_link_id > 0 link_id of link or app-name of link
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@param $id,$app2,$id2 other param of the link if not link_id given
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@result array with link-data or False
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*/
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function get_link($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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@function unlink
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@syntax unlink( $link_id,$app='',$id='',$owner='',$app2='',$id2='' )
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@author ralfbecker
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@abstract Remove link with $link_id or all links matching given params
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@param $link_id link-id to remove if > 0
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@param $app,$id,$owner,$app2,$id2 if $link_id <= 0: removes all links matching the non-empty params
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@result the number of links deleted
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*/
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function unlink($link_id,$app='',$id='',$owner='',$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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$sql = "DELETE FROM $this->link_table WHERE ";
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if ((int)$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->delete($this->link_table,$where,__LINE__,__FILE__);
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return $this->db->affected_rows();
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}
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/*!
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@function chown
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@syntax chown( $owner,$new_owner )
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@author ralfbecker
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@abstract Changes ownership of all links from $owner to $new_owner
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@discussion This is needed when a user/account gets deleted
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@discussion Does NOT change the modification-time
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@result the number of links changed
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*/
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function chown($owner,$new_owner)
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{
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if ((int)$owner <= 0 || (int) $new_owner)
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{
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return 0;
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}
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$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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