From 77fd1f51a3c5f5a52f72ef8a299fe368228e2285 Mon Sep 17 00:00:00 2001 From: vdigital Date: Fri, 23 May 2008 21:05:41 +0000 Subject: git-svn-id: http://piwigo.org/svn/trunk@2357 68402e56-0260-453c-a942-63ccdbb3a9ee --- BSF/include/functions_search.inc.php | 560 +++++++++++++++++++++++++++++++++++ 1 file changed, 560 insertions(+) create mode 100644 BSF/include/functions_search.inc.php (limited to 'BSF/include/functions_search.inc.php') diff --git a/BSF/include/functions_search.inc.php b/BSF/include/functions_search.inc.php new file mode 100644 index 000000000..7069bd5c9 --- /dev/null +++ b/BSF/include/functions_search.inc.php @@ -0,0 +1,560 @@ +' : ' <'). + ($search['fields'][$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; + + return $search_clause; +} + +/** + * returns the list of items corresponding to the advanced search array + * + * @param array search + * @return array + */ +function get_regular_search_results($search) +{ + $items = array(); + + $search_clause = get_sql_search_clause($search); + + if (!empty($search_clause)) + { + $query = ' +SELECT DISTINCT(id) + FROM '.IMAGES_TABLE.' + INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id + WHERE '.$search_clause.' +;'; + $items = array_from_query($query, 'id'); + } + + if (isset($search['fields']['tags'])) + { + $tag_items = get_image_ids_for_tags( + $search['fields']['tags']['words'], + $search['fields']['tags']['mode'] + ); + + switch ($search['mode']) + { + case 'AND': + { + if (empty($search_clause)) + { + $items = $tag_items; + } + else + { + $items = array_intersect($items, $tag_items); + } + break; + } + case 'OR': + { + $items = array_unique( + array_merge( + $items, + $tag_items + ) + ); + break; + } + } + } + + return $items; +} + +/** + * returns the LIKE sql clause corresponding to the quick search query $q + * and the field $field. example q='john bill', field='file' will return + * file LIKE '%john%' OR file LIKE '%bill%'. Special characters for MySql full + * text search (+,<,>,~) are omitted. The query can contain a phrase: + * 'Pierre "New York"' will return LIKE '%Pierre%' OR LIKE '%New York%'. + * @param string q + * @param string field + * @return string + */ +function get_qsearch_like_clause($q, $field) +{ + $q = stripslashes($q); + $tokens = array(); + $token_modifiers = array(); + $crt_token = ""; + $crt_token_modifier = ""; + $state = 0; + + for ($i=0; $i<~')==0 ) + { //special full text modifier + if (strlen($crt_token)) + { + $tokens[] = $crt_token; + $token_modifiers[] = $crt_token_modifier; + $crt_token = ""; + $crt_token_modifier = ""; + } + $crt_token_modifier .= $ch; + } + elseif (preg_match('/[\s,.;!\?]+/', $ch)) + { // white space + if (strlen($crt_token)) + { + $tokens[] = $crt_token; + $token_modifiers[] = $crt_token_modifier; + $crt_token = ""; + $crt_token_modifier = ""; + } + } + else + { + $crt_token .= $ch; + } + break; + case 1: // qualified with quotes + switch ($ch) + { + case '"': + $tokens[] = $crt_token; + $token_modifiers[] = $crt_token_modifier; + $crt_token = ""; + $crt_token_modifier = ""; + $state=0; + break; + default: + $crt_token .= $ch; + } + break; + } + } + if (strlen($crt_token)) + { + $tokens[] = $crt_token; + $token_modifiers[] = $crt_token_modifier; + } + + $clauses = array(); + for ($i=0; $i array(85,68,79...) + * 'as_is' => 1 (indicates the caller that items are ordered and permissions checked + * 'qs' => array( + * 'matching_tags' => array of matching tags + * 'matching_cats' => array of matching categories + * 'matching_cats_no_images' =>array(99) - matching categories without images + * )) + * + * @param string q + * @param string images_where optional aditional restriction on images table + * @return array + */ +function get_quick_search_results($q, $images_where='') +{ + global $page; + $search_results = + array( + 'items' => array(), + 'as_is' => 1, + 'qs' => array('q'=>stripslashes($q)), + ); + $q = trim($q); + if (empty($q)) + { + return $search_results; + } + $q_like_field = '@@__db_field__@@'; //something never in a search + $q_like_clause = get_qsearch_like_clause($q, $q_like_field ); + + + // Step 1 - first we find matches in #images table =========================== + $where_clauses='MATCH(i.name, i.comment) AGAINST( "'.$q.'" IN BOOLEAN MODE)'; + if (!empty($q_like_clause)) + { + $where_clauses .= ' + OR '. str_replace($q_like_field, 'file', $q_like_clause); + $where_clauses = '('.$where_clauses.')'; + } + $where_clauses = array($where_clauses); + if (!empty($images_where)) + { + $where_clauses[]='('.$images_where.')'; + } + $where_clauses[] .= get_sql_condition_FandF + ( + array( 'visible_images' => 'i.id' ), null, true + ); + $query = ' +SELECT i.id, + MATCH(i.name, i.comment) AGAINST( "'.$q.'" IN BOOLEAN MODE) AS weight + FROM '.IMAGES_TABLE.' i + WHERE '.implode("\n AND ", $where_clauses); + + $by_weights=array(); + $result = pwg_query($query); + while ($row = mysql_fetch_array($result)) + { // weight is important when sorting images by relevance + if ($row['weight']) + { + $by_weights[(int)$row['id']] = 2*$row['weight']; + } + else + {//full text does not match but file name match + $by_weights[(int)$row['id']] = 2; + } + } + + + // Step 2 - search tags corresponding to the query $q ======================== + if (!empty($q_like_clause)) + { // search name and url name (without accents) + $query = ' +SELECT id, name, url_name + FROM '.TAGS_TABLE.' + WHERE ('.str_replace($q_like_field, 'CONVERT(name, CHAR)', $q_like_clause).' + OR '.str_replace($q_like_field, 'url_name', $q_like_clause).')'; + $tags = hash_from_query($query, 'id'); + if ( !empty($tags) ) + { // we got some tags; get the images + $search_results['qs']['matching_tags']=$tags; + $query = ' +SELECT image_id, COUNT(tag_id) AS weight + FROM '.IMAGE_TAG_TABLE.' + WHERE tag_id IN ('.implode(',',array_keys($tags)).') + GROUP BY image_id'; + $result = pwg_query($query); + while ($row = mysql_fetch_assoc($result)) + { // weight is important when sorting images by relevance + $image_id=(int)$row['image_id']; + @$by_weights[$image_id] += $row['weight']; + } + } + } + + + // Step 3 - search categories corresponding to the query $q ================== + global $user; + $query = ' +SELECT id, name, permalink, nb_images + FROM '.CATEGORIES_TABLE.' + INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.' ON id=cat_id + WHERE user_id='.$user['id'].' + AND MATCH(name, comment) AGAINST( "'.$q.'" IN BOOLEAN MODE)'. + get_sql_condition_FandF ( + array( 'visible_categories' => 'cat_id' ), "\n AND" + ); + $result = pwg_query($query); + while ($row = mysql_fetch_assoc($result)) + { // weight is important when sorting images by relevance + if ($row['nb_images']==0) + { + $search_results['qs']['matching_cats_no_images'][] = $row; + } + else + { + $search_results['qs']['matching_cats'][$row['id']] = $row; + } + } + + if ( empty($by_weights) and empty($search_results['qs']['matching_cats']) ) + { + return $search_results; + } + + // Step 4 - now we have $by_weights ( array image id => weight ) that need + // permission checks and/or matching categories to get images from + $where_clauses = array(); + if ( !empty($by_weights) ) + { + $where_clauses[]='i.id IN (' + . implode(',', array_keys($by_weights)) . ')'; + } + if ( !empty($search_results['qs']['matching_cats']) ) + { + $where_clauses[]='category_id IN ('. + implode(',',array_keys($search_results['qs']['matching_cats'])).')'; + } + $where_clauses = array( '('.implode("\n OR ",$where_clauses).')' ); + if (!empty($images_where)) + { + $where_clauses[]='('.$images_where.')'; + } + $where_clauses[] = get_sql_condition_FandF( + array + ( + 'forbidden_categories' => 'category_id', + 'visible_categories' => 'category_id', + 'visible_images' => 'i.id' + ), + null,true + ); + + global $conf; + $query = ' +SELECT DISTINCT(id) + FROM '.IMAGES_TABLE.' i + INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON id = ic.image_id + WHERE '.implode("\n AND ", $where_clauses)."\n". + $conf['order_by']; + + $allowed_images = array_from_query( $query, 'id'); + + if ( isset($page['super_order_by']) or empty($by_weights) ) + { + $search_results['items'] = $allowed_images; + return $search_results; + } + + $allowed_images = array_flip( $allowed_images ); + $divisor = 5.0 * count($allowed_images); + foreach ($allowed_images as $id=>$rank ) + { + $weight = isset($by_weights[$id]) ? $by_weights[$id] : 1; + $weight -= $rank/$divisor; + $allowed_images[$id] = $weight; + } + arsort($allowed_images, SORT_NUMERIC); + $search_results['items'] = array_keys($allowed_images); + return $search_results; +} + +/** + * returns an array of 'items' corresponding to the search id + * + * @param int search id + * @param string images_where optional aditional restriction on images table + * @return array + */ +function get_search_results($search_id, $images_where='') +{ + $search = get_search_array($search_id); + if ( !isset($search['q']) ) + { + $result['items'] = get_regular_search_results($search); + return $result; + } + else + { + return get_quick_search_results($search['q'], $images_where); + } +} +?> \ No newline at end of file -- cgit v1.2.3