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<?php
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require_once(LIB_PATH . '/lib_date.php');
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/**
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* Contains a search from the search form.
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*
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* It allows to extract meaningful bits of the search and store them in a
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* convenient object
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*/
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class FreshRSS_Search {
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// This contains the user input string
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private $raw_input = '';
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// The following properties are extracted from the raw input
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private $intitle;
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private $min_date;
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private $max_date;
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private $min_pubdate;
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private $max_pubdate;
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private $inurl;
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private $author;
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private $tags;
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private $search;
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private $not_intitle;
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private $not_inurl;
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private $not_author;
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private $not_tags;
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private $not_search;
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public function __construct($input) {
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if ($input == '') {
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return;
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}
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$this->raw_input = $input;
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$input = preg_replace('/:"(.*?)"/', ':"\1"', $input);
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$input = $this->parseNotIntitleSearch($input);
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$input = $this->parseNotAuthorSearch($input);
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$input = $this->parseNotInurlSearch($input);
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$input = $this->parseNotTagsSearch($input);
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$input = $this->parsePubdateSearch($input);
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$input = $this->parseDateSearch($input);
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$input = $this->parseIntitleSearch($input);
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$input = $this->parseAuthorSearch($input);
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$input = $this->parseInurlSearch($input);
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$input = $this->parseTagsSearch($input);
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$input = $this->parseNotSearch($input);
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$input = $this->parseSearch($input);
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}
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public function __toString() {
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return $this->getRawInput();
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}
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public function getRawInput() {
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return $this->raw_input;
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}
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public function getIntitle() {
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return $this->intitle;
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}
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public function getNotIntitle() {
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return $this->not_intitle;
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}
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public function getMinDate() {
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return $this->min_date;
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}
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public function setMinDate($value) {
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return $this->min_date = $value;
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}
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public function getMaxDate() {
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return $this->max_date;
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}
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public function setMaxDate($value) {
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return $this->max_date = $value;
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}
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public function getMinPubdate() {
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return $this->min_pubdate;
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}
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public function getMaxPubdate() {
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return $this->max_pubdate;
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}
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public function getInurl() {
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return $this->inurl;
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}
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public function getNotInurl() {
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return $this->not_inurl;
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}
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public function getAuthor() {
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return $this->author;
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}
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public function getNotAuthor() {
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return $this->not_author;
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}
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public function getTags() {
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return $this->tags;
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}
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public function getNotTags() {
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return $this->not_tags;
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}
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public function getSearch() {
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return $this->search;
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}
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public function getNotSearch() {
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return $this->not_search;
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}
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private static function removeEmptyValues($anArray) {
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return is_array($anArray) ? array_filter($anArray, function($value) { return $value !== ''; }) : array();
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}
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private static function decodeSpaces($value) {
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if (is_array($value)) {
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for ($i = count($value) - 1; $i >= 0; $i--) {
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$value[$i] = self::decodeSpaces($value[$i]);
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}
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} else {
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$value = trim(str_replace('+', ' ', $value));
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}
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return $value;
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}
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/**
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* Parse the search string to find intitle keyword and the search related
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* to it.
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* The search is the first word following the keyword.
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*
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* @param string $input
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* @return string
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*/
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private function parseIntitleSearch($input) {
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if (preg_match_all('/\bintitle:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->intitle = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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if (preg_match_all('/\bintitle:(?P<search>[^\s"]*)/', $input, $matches)) {
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$this->intitle = array_merge($this->intitle ? $this->intitle : array(), $matches['search']);
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$input = str_replace($matches[0], '', $input);
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}
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$this->intitle = self::removeEmptyValues($this->intitle);
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$this->intitle = self::decodeSpaces($this->intitle);
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return $input;
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}
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private function parseNotIntitleSearch($input) {
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if (preg_match_all('/[!-]intitle:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->not_intitle = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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if (preg_match_all('/[!-]intitle:(?P<search>[^\s"]*)/', $input, $matches)) {
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$this->not_intitle = array_merge($this->not_intitle ? $this->not_intitle : array(), $matches['search']);
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$input = str_replace($matches[0], '', $input);
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}
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$this->not_intitle = self::removeEmptyValues($this->not_intitle);
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$this->not_intitle = self::decodeSpaces($this->not_intitle);
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return $input;
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}
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/**
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* Parse the search string to find author keyword and the search related
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* to it.
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* The search is the first word following the keyword except when using
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* a delimiter. Supported delimiters are single quote (') and double
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* quotes (").
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*
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* @param string $input
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* @return string
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*/
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private function parseAuthorSearch($input) {
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if (preg_match_all('/\bauthor:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->author = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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if (preg_match_all('/\bauthor:(?P<search>[^\s"]*)/', $input, $matches)) {
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$this->author = array_merge($this->author ? $this->author : array(), $matches['search']);
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$input = str_replace($matches[0], '', $input);
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}
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$this->author = self::removeEmptyValues($this->author);
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$this->author = self::decodeSpaces($this->author);
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return $input;
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}
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private function parseNotAuthorSearch($input) {
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if (preg_match_all('/[!-]author:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->not_author = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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if (preg_match_all('/[!-]author:(?P<search>[^\s"]*)/', $input, $matches)) {
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$this->not_author = array_merge($this->not_author ? $this->not_author : array(), $matches['search']);
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$input = str_replace($matches[0], '', $input);
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}
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$this->not_author = self::removeEmptyValues($this->not_author);
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$this->not_author = self::decodeSpaces($this->not_author);
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return $input;
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}
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/**
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* Parse the search string to find inurl keyword and the search related
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* to it.
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* The search is the first word following the keyword.
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*
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* @param string $input
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* @return string
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*/
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private function parseInurlSearch($input) {
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if (preg_match_all('/\binurl:(?P<search>[^\s]*)/', $input, $matches)) {
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$this->inurl = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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$this->inurl = self::removeEmptyValues($this->inurl);
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$this->inurl = self::decodeSpaces($this->inurl);
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return $input;
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}
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private function parseNotInurlSearch($input) {
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if (preg_match_all('/[!-]inurl:(?P<search>[^\s]*)/', $input, $matches)) {
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$this->not_inurl = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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$this->not_inurl = self::removeEmptyValues($this->not_inurl);
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$this->not_inurl = self::decodeSpaces($this->not_inurl);
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return $input;
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}
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/**
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* Parse the search string to find date keyword and the search related
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* to it.
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* The search is the first word following the keyword.
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*
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* @param string $input
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* @return string
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*/
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private function parseDateSearch($input) {
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if (preg_match_all('/\bdate:(?P<search>[^\s]*)/', $input, $matches)) {
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$input = str_replace($matches[0], '', $input);
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$dates = self::removeEmptyValues($matches['search']);
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if (!empty($dates[0])) {
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list($this->min_date, $this->max_date) = parseDateInterval($dates[0]);
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}
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}
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return $input;
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}
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/**
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* Parse the search string to find pubdate keyword and the search related
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* to it.
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* The search is the first word following the keyword.
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*
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* @param string $input
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* @return string
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*/
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private function parsePubdateSearch($input) {
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if (preg_match_all('/\bpubdate:(?P<search>[^\s]*)/', $input, $matches)) {
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$input = str_replace($matches[0], '', $input);
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$dates = self::removeEmptyValues($matches['search']);
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if (!empty($dates[0])) {
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list($this->min_pubdate, $this->max_pubdate) = parseDateInterval($dates[0]);
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}
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}
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return $input;
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}
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/**
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* Parse the search string to find tags keyword (# followed by a word)
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* and the search related to it.
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* The search is the first word following the #.
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*
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* @param string $input
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* @return string
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*/
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private function parseTagsSearch($input) {
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if (preg_match_all('/#(?P<search>[^\s]+)/', $input, $matches)) {
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$this->tags = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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$this->tags = self::removeEmptyValues($this->tags);
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$this->tags = self::decodeSpaces($this->tags);
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return $input;
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}
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private function parseNotTagsSearch($input) {
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if (preg_match_all('/[!-]#(?P<search>[^\s]+)/', $input, $matches)) {
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$this->not_tags = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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$this->not_tags = self::removeEmptyValues($this->not_tags);
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$this->not_tags = self::decodeSpaces($this->not_tags);
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return $input;
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}
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/**
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* Parse the search string to find search values.
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* Every word is a distinct search value, except when using a delimiter.
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* Supported delimiters are single quote (') and double quotes (").
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*
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* @param string $input
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* @return string
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*/
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private function parseSearch($input) {
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$input = self::cleanSearch($input);
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if ($input == '') {
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return;
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}
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if (preg_match_all('/(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->search = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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$input = self::cleanSearch($input);
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if ($input == '') {
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return;
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}
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if (is_array($this->search)) {
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$this->search = array_merge($this->search, explode(' ', $input));
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} else {
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$this->search = explode(' ', $input);
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}
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$this->search = self::decodeSpaces($this->search);
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}
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private function parseNotSearch($input) {
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$input = self::cleanSearch($input);
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if ($input == '') {
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return;
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}
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if (preg_match_all('/[!-](?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
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$this->not_search = $matches['search'];
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$input = str_replace($matches[0], '', $input);
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}
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if ($input == '') {
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return;
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}
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if (preg_match_all('/[!-](?P<search>[^\s]+)/', $input, $matches)) {
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$this->not_search = array_merge(is_array($this->not_search) ? $this->not_search : array(), $matches['search']);
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$input = str_replace($matches[0], '', $input);
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}
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$this->not_search = self::removeEmptyValues($this->not_search);
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$this->not_search = self::decodeSpaces($this->not_search);
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return $input;
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}
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/**
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* Remove all unnecessary spaces in the search
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*
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* @param string $input
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* @return string
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*/
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private static function cleanSearch($input) {
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$input = preg_replace('/\s+/', ' ', $input);
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return trim($input);
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}
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}
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