1 files changed, 149 insertions, 0 deletions
diff --git a/app/Models/Context.php b/app/Models/Context.php
index 1c770c756..645639907 100644
--- a/app/Models/Context.php
+++ b/app/Models/Context.php
@@ -301,4 +301,153 @@ class FreshRSS_Context {
 		}
 		return false;
 	}
+
+	/**
+	 * Parse search string to extract the different keywords.
+	 *
+	 * @return array
+	 */
+	public function parseSearch() {
+		$search = self::$search;
+		$intitle = $this->parseIntitleSearch($search);
+		$author = $this->parseAuthorSearch($intitle['string']);
+		$inurl = $this->parseInurlSearch($author['string']);
+		$pubdate = $this->parsePubdateSearch($inurl['string']);
+		$date = $this->parseDateSearch($pubdate['string']);
+
+		$remaining = array();
+		$remaining_search = trim($date['string']);
+		if (strcmp($remaining_search, '') != 0) {
+			$remaining['search'] = $remaining_search;
+		}
+
+		return array_merge($intitle['search'], $author['search'], $inurl['search'], $date['search'], $pubdate['search'], $remaining);
+	}
+
+	/**
+	 * Parse the search string to find intitle keyword and the search related
+	 * to it.
+	 * The search is the first word following the keyword.
+	 * It returns an array containing the matched string and the search.
+	 *
+	 * @param string $search
+	 * @return array
+	 */
+	private function parseIntitleSearch($search) {
+		if (preg_match('/intitle:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $search, $matches)) {
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('intitle' => $matches['search']),
+			);
+		}
+		if (preg_match('/intitle:(?P<search>\w*)/', $search, $matches)) {
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('intitle' => $matches['search']),
+			);
+		}
+		return array(
+		    'string' => $search,
+		    'search' => array(),
+		);
+	}
+
+	/**
+	 * 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 (").
+	 * It returns an array containing the matched string and the search.
+	 *
+	 * @param string $search
+	 * @return array
+	 */
+	private function parseAuthorSearch($search) {
+		if (preg_match('/author:(?P<delim>[\'"])(?P<search>.*)(?P=delim)/U', $search, $matches)) {
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('author' => $matches['search']),
+			);
+		}
+		if (preg_match('/author:(?P<search>\w*)/', $search, $matches)) {
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('author' => $matches['search']),
+			);
+		}
+		return array(
+		    'string' => $search,
+		    'search' => array(),
+		);
+	}
+
+	/**
+	 * Parse the search string to find inurl keyword and the search related
+	 * to it.
+	 * The search is the first word following the keyword except.
+	 * It returns an array containing the matched string and the search.
+	 *
+	 * @param string $search
+	 * @return array
+	 */
+	private function parseInurlSearch($search) {
+		if (preg_match('/inurl:(?P<search>[^\s]*)/', $search, $matches)) {
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('inurl' => $matches['search']),
+			);
+		}
+		return array(
+		    'string' => $search,
+		    'search' => array(),
+		);
+	}
+
+	/**
+	 * Parse the search string to find date keyword and the search related
+	 * to it.
+	 * The search is the first word following the keyword.
+	 * It returns an array containing the matched string and the search.
+	 *
+	 * @param string $search
+	 * @return array
+	 */
+	private function parseDateSearch($search) {
+		if (preg_match('/date:(?P<search>[^\s]*)/', $search, $matches)) {
+			list($min_date, $max_date) = parseDateInterval($matches['search']);
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('min_date' => $min_date, 'max_date' => $max_date),
+			);
+		}
+		return array(
+		    'string' => $search,
+		    'search' => array(),
+		);
+	}
+
+	/**
+	 * Parse the search string to find pubdate keyword and the search related
+	 * to it.
+	 * The search is the first word following the keyword.
+	 * It returns an array containing the matched string and the search.
+	 *
+	 * @param string $search
+	 * @return array
+	 */
+	private function parsePubdateSearch($search) {
+		if (preg_match('/pubdate:(?P<search>[^\s]*)/', $search, $matches)) {
+			list($min_date, $max_date) = parseDateInterval($matches['search']);
+			return array(
+			    'string' => str_replace($matches[0], '', $search),
+			    'search' => array('min_pubdate' => $min_date, 'max_pubdate' => $max_date),
+			);
+		}
+		return array(
+		    'string' => $search,
+		    'search' => array(),
+		);
+	}
+
 }