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<?php
// +-----------------------------------------------------------------------+
// | PhpWebGallery - a PHP based picture gallery |
// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |
// | Copyright (C) 2003-2006 PhpWebGallery Team - http://phpwebgallery.net |
// +-----------------------------------------------------------------------+
// | branch : BSF (Best So Far)
// | file : $Id$
// | last update : $Date$
// | last modifier : $Author$
// | revision : $Revision$
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify |
// | it under the terms of the GNU General Public License as published by |
// | the Free Software Foundation |
// | |
// | This program is distributed in the hope that it will be useful, but |
// | WITHOUT ANY WARRANTY; without even the implied warranty of |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
// | General Public License for more details. |
// | |
// | You should have received a copy of the GNU General Public License |
// | along with this program; if not, write to the Free Software |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA. |
// +-----------------------------------------------------------------------+
/**
* Prepends and appends a string at each value of the given array.
*
* @param array
* @param string prefix to each array values
* @param string suffix to each array values
*/
function prepend_append_array_items($array, $prepend_str, $append_str)
{
array_walk(
$array,
create_function('&$s', '$s = "'.$prepend_str.'".$s."'.$append_str.'";')
);
return $array;
}
/**
* returns search rules stored into a serialized array in "search"
* table. Each search rules set is numericaly identified.
*
* @param int search_id
* @return array
*/
function get_search_array($search_id)
{
if (!is_numeric($search_id))
{
die('Search id must be an integer');
}
$query = '
SELECT rules
FROM '.SEARCH_TABLE.'
WHERE id = '.$search_id.'
;';
list($serialized_rules) = mysql_fetch_row(pwg_query($query));
return unserialize($serialized_rules);
}
/**
* returns the SQL clause from a search identifier
*
* Search rules are stored in search table as a serialized array. This array
* need to be transformed into an SQL clause to be used in queries.
*
* @param int search_id
* @return string
*/
function get_sql_search_clause($search_id)
{
$search = get_search_array($search_id);
// SQL where clauses are stored in $clauses array during query
// construction
$clauses = array();
foreach (array('file','name','comment','keywords','author') as $textfield)
{
if (isset($search['fields'][$textfield]))
{
$local_clauses = array();
foreach ($search['fields'][$textfield]['words'] as $word)
{
array_push($local_clauses, $textfield." LIKE '%".$word."%'");
}
// adds brackets around where clauses
$local_clauses = prepend_append_array_items($local_clauses, '(', ')');
array_push(
$clauses,
implode(
' '.$search['fields'][$textfield]['mode'].' ',
$local_clauses
)
);
}
}
if (isset($search['fields']['allwords']))
{
$fields = array('file', 'name', 'comment', 'keywords', 'author');
// in the OR mode, request bust be :
// ((field1 LIKE '%word1%' OR field2 LIKE '%word1%')
// OR (field1 LIKE '%word2%' OR field2 LIKE '%word2%'))
//
// in the AND mode :
// ((field1 LIKE '%word1%' OR field2 LIKE '%word1%')
// AND (field1 LIKE '%word2%' OR field2 LIKE '%word2%'))
$word_clauses = array();
foreach ($search['fields']['allwords']['words'] as $word)
{
$field_clauses = array();
foreach ($fields as $field)
{
array_push($field_clauses, $field." LIKE '%".$word."%'");
}
// adds brackets around where clauses
array_push(
$word_clauses,
implode(
"\n OR ",
$field_clauses
)
);
}
array_walk(
$word_clauses,
create_function('&$s','$s="(".$s.")";')
);
array_push(
$clauses,
"\n ".
implode(
"\n ".
$search['fields']['allwords']['mode'].
"\n ",
$word_clauses
)
);
}
foreach (array('date_available', 'date_creation') as $datefield)
{
if (isset($search['fields'][$datefield]))
{
array_push(
$clauses,
$datefield." = '".$search['fields'][$datefield]['date']."'"
);
}
foreach (array('after','before') as $suffix)
{
$key = $datefield.'-'.$suffix;
if (isset($search['fields'][$key]))
{
array_push(
$clauses,
$datefield.
($suffix == 'after' ? ' >' : ' <').
($search['fields'][$key]['inc'] ? '=' : '').
" '".$search['fields'][$key]['date']."'"
);
}
}
}
if (isset($search['fields']['cat']))
{
if ($search['fields']['cat']['sub_inc'])
{
// searching all the categories id of sub-categories
$cat_ids = get_subcat_ids($search['fields']['cat']['words']);
}
else
{
$cat_ids = $search['fields']['cat']['words'];
}
$local_clause = 'category_id IN ('.implode(',', $cat_ids).')';
array_push($clauses, $local_clause);
}
// adds brackets around where clauses
$clauses = prepend_append_array_items($clauses, '(', ')');
$where_separator =
implode(
"\n ".$search['mode'].' ',
$clauses
);
$search_clause = $where_separator;
if (isset($forbidden))
{
$search_clause.= "\n AND ".$forbidden;
}
return $search_clause;
}
?>
|
