21979ff11c
* Searching '-mytag' will now exlude all shaares with 'mytag' tag. * All tags starting with a '-' are renamed without it (through the Updater). * Unit tests. Minor code changes: * LinkDB->filter() can now take no parameters (get all link depending on logged status). * tagsStrToArray() is now static and filters blank tags.
291 lines
8.9 KiB
PHP
291 lines
8.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Class LinkFilter.
|
|
*
|
|
* Perform search and filter operation on link data list.
|
|
*/
|
|
class LinkFilter
|
|
{
|
|
/**
|
|
* @var string permalinks.
|
|
*/
|
|
public static $FILTER_HASH = 'permalink';
|
|
|
|
/**
|
|
* @var string text search.
|
|
*/
|
|
public static $FILTER_TEXT = 'fulltext';
|
|
|
|
/**
|
|
* @var string tag filter.
|
|
*/
|
|
public static $FILTER_TAG = 'tags';
|
|
|
|
/**
|
|
* @var string filter by day.
|
|
*/
|
|
public static $FILTER_DAY = 'FILTER_DAY';
|
|
|
|
/**
|
|
* @var array all available links.
|
|
*/
|
|
private $links;
|
|
|
|
/**
|
|
* @param array $links initialization.
|
|
*/
|
|
public function __construct($links)
|
|
{
|
|
$this->links = $links;
|
|
}
|
|
|
|
/**
|
|
* Filter links according to parameters.
|
|
*
|
|
* @param string $type Type of filter (eg. tags, permalink, etc.).
|
|
* @param string $request Filter content.
|
|
* @param bool $casesensitive Optional: Perform case sensitive filter if true.
|
|
* @param bool $privateonly Optional: Only returns private links if true.
|
|
*
|
|
* @return array filtered link list.
|
|
*/
|
|
public function filter($type, $request, $casesensitive = false, $privateonly = false)
|
|
{
|
|
switch($type) {
|
|
case self::$FILTER_HASH:
|
|
return $this->filterSmallHash($request);
|
|
break;
|
|
case self::$FILTER_TEXT:
|
|
return $this->filterFulltext($request, $privateonly);
|
|
break;
|
|
case self::$FILTER_TAG:
|
|
return $this->filterTags($request, $casesensitive, $privateonly);
|
|
break;
|
|
case self::$FILTER_DAY:
|
|
return $this->filterDay($request);
|
|
break;
|
|
default:
|
|
return $this->noFilter($privateonly);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unknown filter, but handle private only.
|
|
*
|
|
* @param bool $privateonly returns private link only if true.
|
|
*
|
|
* @return array filtered links.
|
|
*/
|
|
private function noFilter($privateonly = false)
|
|
{
|
|
if (! $privateonly) {
|
|
krsort($this->links);
|
|
return $this->links;
|
|
}
|
|
|
|
$out = array();
|
|
foreach ($this->links as $value) {
|
|
if ($value['private']) {
|
|
$out[$value['linkdate']] = $value;
|
|
}
|
|
}
|
|
|
|
krsort($out);
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* Returns the shaare corresponding to a smallHash.
|
|
*
|
|
* @param string $smallHash permalink hash.
|
|
*
|
|
* @return array $filtered array containing permalink data.
|
|
*/
|
|
private function filterSmallHash($smallHash)
|
|
{
|
|
$filtered = array();
|
|
foreach ($this->links as $l) {
|
|
if ($smallHash == smallHash($l['linkdate'])) {
|
|
// Yes, this is ugly and slow
|
|
$filtered[$l['linkdate']] = $l;
|
|
return $filtered;
|
|
}
|
|
}
|
|
return $filtered;
|
|
}
|
|
|
|
/**
|
|
* Returns the list of links corresponding to a full-text search
|
|
*
|
|
* Searches:
|
|
* - in the URLs, title and description;
|
|
* - are case-insensitive.
|
|
*
|
|
* Example:
|
|
* print_r($mydb->filterFulltext('hollandais'));
|
|
*
|
|
* mb_convert_case($val, MB_CASE_LOWER, 'UTF-8')
|
|
* - allows to perform searches on Unicode text
|
|
* - see https://github.com/shaarli/Shaarli/issues/75 for examples
|
|
*
|
|
* @param string $searchterms search query.
|
|
* @param bool $privateonly return only private links if true.
|
|
*
|
|
* @return array search results.
|
|
*/
|
|
private function filterFulltext($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;
|
|
$searchExactPhrase = false;
|
|
|
|
// Check if we're using double-quotes to search for the exact string
|
|
if ($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);
|
|
}
|
|
// Iterate over every stored link.
|
|
foreach ($this->links as $link) {
|
|
|
|
// ignore non private links when 'privatonly' is on.
|
|
if (! $link['private'] && $privateonly === true) {
|
|
continue;
|
|
}
|
|
|
|
// Iterate over searchable link fields.
|
|
foreach ($keys as $key) {
|
|
// 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, $search) !== false) {
|
|
break;
|
|
}
|
|
else {
|
|
// Iterate over keywords, if keyword is not found,
|
|
// no need to check for the others. We want all or nothing.
|
|
foreach($explodedSearch as $keyword) {
|
|
if(strpos($haystack, $keyword) === false) {
|
|
$found = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// One of the fields of the link matches, no need to check the other.
|
|
if ($found) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ($found) {
|
|
$filtered[$link['linkdate']] = $link;
|
|
}
|
|
}
|
|
|
|
krsort($filtered);
|
|
return $filtered;
|
|
}
|
|
|
|
/**
|
|
* Returns the list of links associated with a given list of tags
|
|
*
|
|
* You can specify one or more tags, separated by space or a comma, e.g.
|
|
* print_r($mydb->filterTags('linux programming'));
|
|
*
|
|
* @param string $tags list of tags separated by commas or blank spaces.
|
|
* @param bool $casesensitive ignore case if false.
|
|
* @param bool $privateonly returns private links only.
|
|
*
|
|
* @return array filtered links.
|
|
*/
|
|
public function filterTags($tags, $casesensitive = false, $privateonly = false)
|
|
{
|
|
$searchtags = self::tagsStrToArray($tags, $casesensitive);
|
|
$filtered = array();
|
|
if (empty($searchtags)) {
|
|
return $filtered;
|
|
}
|
|
|
|
foreach ($this->links as $link) {
|
|
// ignore non private links when 'privatonly' is on.
|
|
if (! $link['private'] && $privateonly === true) {
|
|
continue;
|
|
}
|
|
|
|
$linktags = self::tagsStrToArray($link['tags'], $casesensitive);
|
|
|
|
$found = true;
|
|
for ($i = 0 ; $i < count($searchtags) && $found; $i++) {
|
|
// Exclusive search, quit if tag found.
|
|
// Or, tag not found in the link, quit.
|
|
if (($searchtags[$i][0] == '-' && in_array(substr($searchtags[$i], 1), $linktags))
|
|
|| ($searchtags[$i][0] != '-') && ! in_array($searchtags[$i], $linktags)
|
|
) {
|
|
$found = false;
|
|
}
|
|
}
|
|
|
|
if ($found) {
|
|
$filtered[$link['linkdate']] = $link;
|
|
}
|
|
}
|
|
krsort($filtered);
|
|
return $filtered;
|
|
}
|
|
|
|
/**
|
|
* Returns the list of articles for a given day, chronologically sorted
|
|
*
|
|
* Day must be in the form 'YYYYMMDD' (e.g. '20120125'), e.g.
|
|
* print_r($mydb->filterDay('20120125'));
|
|
*
|
|
* @param string $day day to filter.
|
|
*
|
|
* @return array all link matching given day.
|
|
*
|
|
* @throws Exception if date format is invalid.
|
|
*/
|
|
public function filterDay($day)
|
|
{
|
|
if (! checkDateFormat('Ymd', $day)) {
|
|
throw new Exception('Invalid date format');
|
|
}
|
|
|
|
$filtered = array();
|
|
foreach ($this->links as $l) {
|
|
if (startsWith($l['linkdate'], $day)) {
|
|
$filtered[$l['linkdate']] = $l;
|
|
}
|
|
}
|
|
ksort($filtered);
|
|
return $filtered;
|
|
}
|
|
|
|
/**
|
|
* Convert a list of tags (str) to an array. Also
|
|
* - handle case sensitivity.
|
|
* - accepts spaces commas as separator.
|
|
*
|
|
* @param string $tags string containing a list of tags.
|
|
* @param bool $casesensitive will convert everything to lowercase if false.
|
|
*
|
|
* @return array filtered tags string.
|
|
*/
|
|
public static function tagsStrToArray($tags, $casesensitive)
|
|
{
|
|
// We use UTF-8 conversion to handle various graphemes (i.e. cyrillic, or greek)
|
|
$tagsOut = $casesensitive ? $tags : mb_convert_case($tags, MB_CASE_LOWER, 'UTF-8');
|
|
$tagsOut = str_replace(',', ' ', $tagsOut);
|
|
|
|
return array_filter(explode(' ', trim($tagsOut)), 'strlen');
|
|
}
|
|
}
|