Merge pull request #455 from ArthurHoaro/improved-search-454
Improved search: combine AND, exact terms and exclude search.
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Arthur
commit
bfec695df1
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@ -120,7 +120,9 @@ class LinkFilter
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*
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* Searches:
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* - in the URLs, title and description;
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* - are case-insensitive.
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* - are case-insensitive;
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* - terms surrounded by quotes " are exact terms search.
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* - terms starting with a dash - are excluded (except exact terms).
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*
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* Example:
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* print_r($mydb->filterFulltext('hollandais'));
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@ -136,19 +138,30 @@ class LinkFilter
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*/
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private function filterFulltext($searchterms, $privateonly = false)
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{
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$filtered = array();
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$search = mb_convert_case(html_entity_decode($searchterms), MB_CASE_LOWER, 'UTF-8');
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$explodedSearch = explode(' ', trim($search));
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$keys = array('title', 'description', 'url', 'tags');
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$found = true;
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$searchExactPhrase = false;
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$exactRegex = '/"([^"]+)"/';
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// Retrieve exact search terms.
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preg_match_all($exactRegex, $search, $exactSearch);
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$exactSearch = array_values(array_filter($exactSearch[1]));
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// Check if we're using double-quotes to search for the exact string
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if ($search[0] == '"' && $search[strlen($search) - 1] == '"') {
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$searchExactPhrase = true;
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// Remove the double-quotes as they are not what we search for
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$search = substr($search, 1, -1);
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// Remove exact search terms to get AND terms search.
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$explodedSearchAnd = explode(' ', trim(preg_replace($exactRegex, '', $search)));
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$explodedSearchAnd = array_values(array_filter($explodedSearchAnd));
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// Filter excluding terms and update andSearch.
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$excludeSearch = array();
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$andSearch = array();
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foreach ($explodedSearchAnd as $needle) {
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if ($needle[0] == '-' && strlen($needle) > 1) {
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$excludeSearch[] = substr($needle, 1);
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} else {
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$andSearch[] = $needle;
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}
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}
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$keys = array('title', 'description', 'url', 'tags');
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// Iterate over every stored link.
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foreach ($this->links as $link) {
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@ -157,35 +170,32 @@ class LinkFilter
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continue;
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}
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// Iterate over searchable link fields.
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// Concatenate link fields to search across fields.
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// Adds a '\' separator for exact search terms.
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$content = '';
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foreach ($keys as $key) {
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// Be optimistic
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$found = true;
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// FIXME: Find a better word for where you're searching in
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$haystack = mb_convert_case($link[$key], MB_CASE_LOWER, 'UTF-8');
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// When searching for the phrase, check if it's in the haystack...
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if ( $searchExactPhrase && strpos($haystack, $search) !== false) {
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break;
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}
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else {
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// Iterate over keywords, if keyword is not found,
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// no need to check for the others. We want all or nothing.
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foreach($explodedSearch as $keyword) {
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if(strpos($haystack, $keyword) === false) {
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$found = false;
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break;
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}
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}
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}
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// One of the fields of the link matches, no need to check the other.
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if ($found) {
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break;
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}
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$content .= mb_convert_case($link[$key], MB_CASE_LOWER, 'UTF-8') . '\\';
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}
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// Be optimistic
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$found = true;
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// First, we look for exact term search
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for ($i = 0; $i < count($exactSearch) && $found; $i++) {
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$found = strpos($content, $exactSearch[$i]) !== false;
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}
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// Iterate over keywords, if keyword is not found,
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// no need to check for the others. We want all or nothing.
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for ($i = 0; $i < count($andSearch) && $found; $i++) {
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$found = strpos($content, $andSearch[$i]) !== false;
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}
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// Exclude terms.
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for ($i = 0; $i < count($excludeSearch) && $found; $i++) {
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$found = strpos($content, $excludeSearch[$i]) === false;
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}
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if ($found) {
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$filtered[$link['linkdate']] = $link;
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}
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@ -278,6 +278,7 @@ class LinkDBTest extends PHPUnit_Framework_TestCase
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'stallman' => 1,
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'free' => 1,
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'-exclude' => 1,
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'stuff' => 2,
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),
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self::$publicLinkDB->allTags()
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);
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@ -297,6 +298,7 @@ class LinkDBTest extends PHPUnit_Framework_TestCase
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'w3c' => 1,
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'css' => 1,
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'Mercurial' => 1,
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'stuff' => 2,
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'-exclude' => 1,
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'.hidden' => 1,
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),
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@ -27,7 +27,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
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public function testFilter()
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{
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$this->assertEquals(
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6,
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7,
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count(self::$linkFilter->filter('', ''))
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);
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@ -164,6 +164,17 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
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);
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}
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/**
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* Full-text search - no result found.
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*/
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public function testFilterFullTextNoResult()
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{
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$this->assertEquals(
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0,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'azertyuiop'))
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);
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}
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/**
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* Full-text search - result from a link's URL
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*/
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@ -222,7 +233,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
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);
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$this->assertEquals(
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2,
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3,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '"free software"'))
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);
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}
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@ -250,11 +261,71 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
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public function testFilterFullTextMixed()
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{
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$this->assertEquals(
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2,
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3,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'free software'))
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);
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}
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/**
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* Full-text search - test exclusion with '-'.
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*/
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public function testExcludeSearch()
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{
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$this->assertEquals(
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1,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, 'free -gnu'))
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);
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$this->assertEquals(
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6,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '-revolution'))
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);
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}
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/**
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* Full-text search - test AND, exact terms and exclusion combined, across fields.
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*/
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public function testMultiSearch()
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{
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$this->assertEquals(
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2,
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count(self::$linkFilter->filter(
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LinkFilter::$FILTER_TEXT,
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'"Free Software " stallman "read this" @website stuff'
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))
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);
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$this->assertEquals(
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1,
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count(self::$linkFilter->filter(
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LinkFilter::$FILTER_TEXT,
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'"free software " stallman "read this" -beard @website stuff'
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))
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);
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}
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/**
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* Full-text search - make sure that exact search won't work across fields.
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*/
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public function testSearchExactTermMultiFieldsKo()
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{
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$this->assertEquals(
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0,
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count(self::$linkFilter->filter(
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LinkFilter::$FILTER_TEXT,
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'"designer naming"'
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))
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);
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$this->assertEquals(
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0,
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count(self::$linkFilter->filter(
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LinkFilter::$FILTER_TEXT,
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'"designernaming"'
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))
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);
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}
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/**
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* Tag search with exclusion.
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*/
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@ -266,7 +337,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
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);
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$this->assertEquals(
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5,
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6,
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count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, '-free'))
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);
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}
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@ -14,12 +14,21 @@ class ReferenceLinkDB
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function __construct()
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{
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$this->addLink(
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'Free as in Freedom 2.0',
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'Free as in Freedom 2.0 @website',
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'https://static.fsf.org/nosvn/faif-2.0.pdf',
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'Richard Stallman and the Free Software Revolution',
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'Richard Stallman and the Free Software Revolution. Read this.',
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0,
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'20150310_114633',
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'free gnu software stallman -exclude'
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'free gnu software stallman -exclude stuff'
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);
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$this->addLink(
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'Link title: @website',
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'local',
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'Stallman has a beard and is part of the Free Software Foundation (or not). Seriously, read this.',
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0,
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'20150310_114651',
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'stuff'
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);
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$this->addLink(
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