/**
* Obtain the query needed to obtain our file listing via webservices
* NOTE: This is currently implemented as a Lucene query
*
* @param string $search_text The search text entered, which contains tokens
* representing either file name or file content
* @param int $categories An array of category ids to filter on (i.e. results
* must be in one or more to be included), or NULL to not filter
* by category
* @return string The complete search query
*/
private function get_search_query($search_text, $categories = NULL) {
global $DB;
$query_fragments = array();
// The text-based search component
if ($search_text != '') {
$text_query_tokens = array();
// Valid as long as the file a name or contents match one text token
$tokens = explode(' ', $search_text);
foreach ($tokens as $token) {
$text_query_tokens[] = '@cm\:name:"*'.$token.'*"';
$text_query_tokens[] = 'TEXT:\"'.$token.'\"';
}
$query_fragments[] = implode(' OR ', $text_query_tokens);
}
// The category-based search component
if (is_array($categories)) {
$category_query_tokens = array();
// Valid as long as the file is in at least one of the categories
foreach ($categories as $category) {
//TODO: search based on UUID rather than title
// current side-effect is that duplicate titles will be matched
if ($categorytitle = $DB->get_field('repository_elisfiles_cats', 'title', array('id' => $category))) {
$cattitle = elis_files_ISO_9075_map($categorytitle);
$category_query_tokens[] = 'PATH:"/cm:generalclassifiable//cm:'.$cattitle.'//member"';
}
}
$query_fragments[] = implode(' OR ', $category_query_tokens);
}
// File must satisfy both the text-based and category-based conditions
$query = '('.implode(') AND (', $query_fragments).')';
return $query;
}
/**
* Perform a search for all content within a specific category.
*
* @param array $categories An array of category database records.
* @return object An object containing an array of folders and file node references.
*/
function elis_files_category_search($categories) {
$return = new stdClass;
$return->folders = array();
$return->files = array();
$nodes = array();
foreach ($categories as $category) {
$cattitle = elis_files_ISO_9075_map($category->title);
$response = elis_files_utils_invoke_service('/moodle/categorysearch/' . $cattitle);
$sxml = RLsimpleXMLelement($response);
if (empty($sxml)) {
return false;
}
foreach ($sxml->node as $node) {
if (!isset($nodes["$node->uuid"])) {
$nodes["$node->uuid"] = "$node->title";
}
}
}
if (!empty($nodes)) {
foreach ($nodes as $uuid => $title) {
$node = elis_files_node_properties($uuid);
$type = elis_files_get_type($node->uuid);
if ($type == ELIS_files::$type_folder) {
$return->folders[] = $node;
} else if ($type == ELIS_files::$type_document) {
$return->files[] = $node;
}
}
}
return $return;
}