*
* Searches:
* - in the URLs, title and description;
- * - are case-insensitive.
+ * - are case-insensitive;
+ * - terms surrounded by quotes " are exact terms search.
+ * - terms starting with a dash - are excluded (except exact terms).
*
* Example:
* print_r($mydb->filterFulltext('hollandais'));
private function filterFulltext($searchterms, $privateonly = false)
{
$search = mb_convert_case(html_entity_decode($searchterms), MB_CASE_LOWER, 'UTF-8');
- $explodedSearch = explode(' ', trim($search));
- $keys = array('title', 'description', 'url', 'tags');
- $found = true;
- $searchExactPhrase = false;
+ $exactRegex = '/"([^"]+)"/';
+ // Retrieve exact search terms.
+ preg_match_all($exactRegex, $search, $exactSearch);
+ $exactSearch = array_values(array_filter($exactSearch[1]));
- // Check if we're using double-quotes to search for the exact string
- if ($search[0] == '"' && $search[strlen($search) - 1] == '"') {
- $searchExactPhrase = true;
-
- // Remove the double-quotes as they are not what we search for
- $search = substr($search, 1, -1);
+ // Remove exact search terms to get AND terms search.
+ $explodedSearchAnd = explode(' ', trim(preg_replace($exactRegex, '', $search)));
+ $explodedSearchAnd = array_values(array_filter($explodedSearchAnd));
+
+ // Filter excluding terms and update andSearch.
+ $excludeSearch = array();
+ $andSearch = array();
+ foreach ($explodedSearchAnd as $needle) {
+ if ($needle[0] == '-' && strlen($needle) > 1) {
+ $excludeSearch[] = substr($needle, 1);
+ } else {
+ $andSearch[] = $needle;
+ }
}
+
+ $keys = array('title', 'description', 'url', 'tags');
+
// Iterate over every stored link.
foreach ($this->links as $link) {
// Be optimistic
$found = true;
- // FIXME: Find a better word for where you're searching in
$haystack = mb_convert_case($link[$key], MB_CASE_LOWER, 'UTF-8');
- // When searching for the phrase, check if it's in the haystack...
- if ( $searchExactPhrase && strpos($haystack, $search) !== false) {
- break;
+ // First, we look for exact term search
+ for ($i = 0; $i < count($exactSearch) && $found; $i++) {
+ $found = strpos($haystack, $exactSearch[$i]) !== false;
}
- else {
- // Iterate over keywords, if keyword is not found,
- // no need to check for the others. We want all or nothing.
- foreach($explodedSearch as $keyword) {
- if(strpos($haystack, $keyword) === false) {
- $found = false;
- break;
- }
- }
+
+ // Iterate over keywords, if keyword is not found,
+ // no need to check for the others. We want all or nothing.
+ for ($i = 0; $i < count($andSearch) && $found; $i++) {
+ $found = strpos($haystack, $andSearch[$i]) !== false;
+ }
+
+ // Exclude terms.
+ for ($i = 0; $i < count($excludeSearch) && $found; $i++) {
+ $found = strpos($haystack, $excludeSearch[$i]) === false;
}
// One of the fields of the link matches, no need to check the other.
public function testFilter()
{
$this->assertEquals(
- 6,
+ 7,
count(self::$linkFilter->filter('', ''))
);
);
$this->assertEquals(
- 2,
+ 3,
count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '"free software"'))
);
}
public function testFilterFullTextMixed()
{
$this->assertEquals(
- 2,
+ 3,
count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'free software'))
);
}
+ /**
+ * Full-text search - test exclusion with '-'.
+ */
+ public function testExcludeSearch()
+ {
+ $this->assertEquals(
+ 1,
+ count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'free -software'))
+ );
+
+ $this->assertEquals(
+ 7,
+ count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '-software'))
+ );
+ }
+
+ /**
+ * Full-text search - test AND, exact terms and exclusion combined.
+ */
+ public function testMultiSearch()
+ {
+ $this->assertEquals(
+ 2,
+ count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '"Free Software " stallman "read this"'))
+ );
+
+ $this->assertEquals(
+ 1,
+ count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '"free software " stallman "read this" -beard'))
+ );
+ }
+
/**
* Tag search with exclusion.
*/
);
$this->assertEquals(
- 5,
+ 6,
count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, '-free'))
);
}