forked from blallo/rss-bridge
[FilterMore] NEW bridge for advanced filtering
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boyska
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1 changed files with 157 additions and 0 deletions
157
bridges/FilterMoreBridge.php
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157
bridges/FilterMoreBridge.php
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<?php
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class FilterMoreBridge extends FeedExpander {
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const MAINTAINER = 'boyska';
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const NAME = 'FilterMore';
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const CACHE_TIMEOUT = 2;
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const DESCRIPTION = 'Filters a feed of your choice';
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const URI = 'https://git.lattuta.net/boyska/rss-bridge';
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const PARAMETERS = array(array(
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'url' => array(
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'name' => 'Feed URL',
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'required' => true,
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),
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'conj_type' => array(
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'name' => 'Conjunction type type',
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'type' => 'list',
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'required' => false,
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'values' => array(
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'All conditions must be met' => 'and',
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'Any condition must be met' => 'or',
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),
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'defaultValue' => 'permit',
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),
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'title_re' => array(
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'name' => 'Filter item title (regular expression, see php.net/pcre_match for details)',
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'required' => false,
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'exampleValue' => '/breaking\ news/i',
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),
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'body_re' => array(
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'name' => 'Filter body (regular expression)',
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'required' => false,
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),
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'author_re' => array(
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'name' => 'Filter author (regular expression)',
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'required' => false,
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'exampleValue' => '/(technology|politics)/i',
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),
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'newer_than' => array(
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'name' => 'Filter date: ok if newer than the value (see php.net/strtotime for details)',
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'required' => false,
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'exampleValue' => '-14 days',
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),
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'older_than' => array(
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'name' => 'Filter date: ok if older than the value (see php.net/strtotime for details)',
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'required' => false,
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'exampleValue' => '-1 hour',
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),
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'invert_filter' => array(
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'name' => 'Invert filter result',
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'type' => 'checkbox',
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'required' => false,
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'defaultValue' => false,
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),
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));
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protected function parseItem($newItem){
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$item = parent::parseItem($newItem);
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$filters = ['filterByTitle', 'filterByBody', 'filterByAuthor', 'filterByDateNewer', 'filterByDateOlder'];
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$results = [];
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foreach($filters as $filter) {
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$filter_res = $this->$filter($item);
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if($filter_res === null) continue;
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$results[] = $filter_res;
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}
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if(count($results) === 0) {
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return $item;
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}
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if($this->getConjType() === 'and') {
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$result = !in_array(false, $results);
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} else { // or
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$result = in_array(true, $results);
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}
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if($this->getInvertResult()) {
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$result = !$result;
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}
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if($result)
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return $item;
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else
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return null;
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}
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private function cmp($a, $b) {
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if($a > $b) return 1;
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if($a < $b) return -1;
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return 0;
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}
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private function filterByFieldRegexp($field, $re){
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if($re === "") return null;
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if(preg_match($re, $field)) {
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return true;
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}
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return false;
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}
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protected function filterByTitle($item){
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$re = $this->getInput('title_re');
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return $this->filterByFieldRegexp($item['title'], $re);
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}
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protected function filterByBody($item){
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$re = $this->getInput('body_re');
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return $this->filterByFieldRegexp($item['content'], $re);
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}
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protected function filterByAuthor($item){
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$re = $this->getInput('author_re');
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return $this->filterByFieldRegexp($item['author'], $re);
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}
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private function filterByDate($item, $input, $expected){
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$val = $this->getInput($input);
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if($val === "") return null;
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$ts = strtotime($val);
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if($ts === false) {
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throw new Exception("Invalid time specification: " . $val);
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}
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$cmp = $this->cmp($item['timestamp'], $ts); // 1 if newer, -1 if older
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return $cmp === $expected;
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}
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protected function filterByDateNewer($item){
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return $this->filterByDate($item, 'newer_than', 1);
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}
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protected function filterByDateOlder($item){
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return $this->filterByDate($item, 'older_than', -1);
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}
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protected function getConjType(){
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return $this->getInput('conj_type');
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}
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protected function getInvertResult(){
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return $this->getInput('invert_filter');
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}
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public function getURI(){
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$url = $this->getInput('url');
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if(empty($url)) {
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$url = parent::getURI();
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}
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return $url;
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}
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public function collectData(){
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if($this->getInput('url') && substr($this->getInput('url'), 0, strlen('http')) !== 'http') {
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// just in case someone find a way to access local files by playing with the url
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returnClientError('The url parameter must either refer to http or https protocol.');
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}
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try{
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$this->collectExpandableDatas($this->getURI());
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} catch (HttpException $e) {
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$this->collectExpandableDatas($this->getURI());
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}
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}
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}
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