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229 lines
5.6 KiB
229 lines
5.6 KiB
<?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 $search; |
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public function __construct($input) { |
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if (strcmp($input, '') == 0) { |
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return; |
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} |
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$this->raw_input = $input; |
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$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 = $this->parsePubdateSearch($input); |
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$input = $this->parseDateSearch($input); |
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$input = $this->parseTagsSeach($input); |
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$this->parseSearch($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 getMinDate() { |
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return $this->min_date; |
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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 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 getAuthor() { |
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return $this->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 getSearch() { |
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return $this->search; |
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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('/intitle:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) { |
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$this->intitle = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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} |
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if (preg_match('/intitle:(?P<search>\w*)/', $input, $matches)) { |
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$this->intitle = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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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 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('/author:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) { |
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$this->author = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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} |
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if (preg_match('/author:(?P<search>\w*)/', $input, $matches)) { |
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$this->author = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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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 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 except. |
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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('/inurl:(?P<search>[^\s]*)/', $input, $matches)) { |
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$this->inurl = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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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 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('/date:(?P<search>[^\s]*)/', $input, $matches)) { |
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list($this->min_date, $this->max_date) = parseDateInterval($matches['search']); |
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return str_replace($matches[0], '', $input); |
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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('/pubdate:(?P<search>[^\s]*)/', $input, $matches)) { |
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list($this->min_pubdate, $this->max_pubdate) = parseDateInterval($matches['search']); |
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return str_replace($matches[0], '', $input); |
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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 $input |
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* @return string |
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*/ |
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private function parseTagsSeach($input) { |
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if (preg_match_all('/#(?P<search>[^\s]+)/', $input, $matches)) { |
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$this->tags = $matches['search']; |
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return str_replace($matches[0], '', $input); |
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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 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 = $this->cleanSearch($input); |
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if (strcmp($input, '') == 0) { |
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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 = $this->cleanSearch($input); |
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if (strcmp($input, '') == 0) { |
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return; |
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} |
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if (is_array($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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} |
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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 $input |
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* @return string |
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*/ |
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private function cleanSearch($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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