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<?php
require_once(LIB_PATH . '/lib_date.php');
/**
* Contains a search from the search form.
*
* It allows to extract meaningful bits of the search and store them in a
* convenient object
*/
class FreshRSS_Search {
// This contains the user input string
private $raw_input = '';
// The following properties are extracted from the raw input
private $intitle;
private $min_date;
private $max_date;
private $min_pubdate;
private $max_pubdate;
private $inurl;
private $author;
private $tags;
private $search;
public function __construct($input) {
if (strcmp($input, '') == 0) {
return;
}
$this->raw_input = $input;
$input = $this->parseIntitleSearch($input);
$input = $this->parseAuthorSearch($input);
$input = $this->parseInurlSearch($input);
$input = $this->parsePubdateSearch($input);
$input = $this->parseDateSearch($input);
$input = $this->parseTagsSeach($input);
$this->parseSearch($input);
}
public function __toString() {
return $this->getRawInput();
}
public function getRawInput() {
return $this->raw_input;
}
public function getIntitle() {
return $this->intitle;
}
public function getMinDate() {
return $this->min_date;
}
public function getMaxDate() {
return $this->max_date;
}
public function getMinPubdate() {
return $this->min_pubdate;
}
public function getMaxPubdate() {
return $this->max_pubdate;
}
public function getInurl() {
return $this->inurl;
}
public function getAuthor() {
return $this->author;
}
public function getTags() {
return $this->tags;
}
public function getSearch() {
return $this->search;
}
/**
* Parse the search string to find intitle keyword and the search related
* to it.
* The search is the first word following the keyword.
*
* @param string $input
* @return string
*/
private function parseIntitleSearch($input) {
if (preg_match('/intitle:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
$this->intitle = $matches['search'];
return str_replace($matches[0], '', $input);
}
if (preg_match('/intitle:(?P<search>\w*)/', $input, $matches)) {
$this->intitle = $matches['search'];
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find author keyword and the search related
* to it.
* The search is the first word following the keyword except when using
* a delimiter. Supported delimiters are single quote (') and double
* quotes (").
*
* @param string $input
* @return string
*/
private function parseAuthorSearch($input) {
if (preg_match('/author:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
$this->author = $matches['search'];
return str_replace($matches[0], '', $input);
}
if (preg_match('/author:(?P<search>\w*)/', $input, $matches)) {
$this->author = $matches['search'];
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find inurl keyword and the search related
* to it.
* The search is the first word following the keyword except.
*
* @param string $input
* @return string
*/
private function parseInurlSearch($input) {
if (preg_match('/inurl:(?P<search>[^\s]*)/', $input, $matches)) {
$this->inurl = $matches['search'];
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find date keyword and the search related
* to it.
* The search is the first word following the keyword.
*
* @param string $input
* @return string
*/
private function parseDateSearch($input) {
if (preg_match('/date:(?P<search>[^\s]*)/', $input, $matches)) {
list($this->min_date, $this->max_date) = parseDateInterval($matches['search']);
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find pubdate keyword and the search related
* to it.
* The search is the first word following the keyword.
*
* @param string $input
* @return string
*/
private function parsePubdateSearch($input) {
if (preg_match('/pubdate:(?P<search>[^\s]*)/', $input, $matches)) {
list($this->min_pubdate, $this->max_pubdate) = parseDateInterval($matches['search']);
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find tags keyword (# followed by a word)
* and the search related to it.
* The search is the first word following the #.
*
* @param string $input
* @return string
*/
private function parseTagsSeach($input) {
if (preg_match_all('/#(?P<search>[^\s]+)/', $input, $matches)) {
$this->tags = $matches['search'];
return str_replace($matches[0], '', $input);
}
return $input;
}
/**
* Parse the search string to find search values.
* Every word is a distinct search value, except when using a delimiter.
* Supported delimiters are single quote (') and double quotes (").
*
* @param string $input
* @return string
*/
private function parseSearch($input) {
$input = $this->cleanSearch($input);
if (strcmp($input, '') == 0) {
return;
}
if (preg_match_all('/(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $input, $matches)) {
$this->search = $matches['search'];
$input = str_replace($matches[0], '', $input);
}
$input = $this->cleanSearch($input);
if (strcmp($input, '') == 0) {
return;
}
if (is_array($this->search)) {
$this->search = array_merge($this->search, explode(' ', $input));
} else {
$this->search = explode(' ', $input);
}
}
/**
* Remove all unnecessary spaces in the search
*
* @param string $input
* @return string
*/
private function cleanSearch($input) {
$input = preg_replace('/\s+/', ' ', $input);
return trim($input);
}
}
|
