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(),
+		);
+	}
+
 }
diff --git a/tests/app/Models/ContextTest.php b/tests/app/Models/ContextTest.php
new file mode 100644
index 000000000..c5da6f667
--- /dev/null
+++ b/tests/app/Models/ContextTest.php
@@ -0,0 +1,241 @@
+<?php
+
+require_once(LIB_PATH . '/lib_date.php');
+
+class ContextTest extends \PHPUnit_Framework_TestCase {
+
+	private $context;
+
+	public function setUp() {
+		$this->context = new FreshRSS_Context();
+	}
+
+	public function testParseSearch_whenEmpty_returnsEmptyArray() {
+		$this->assertCount(0, $this->context->parseSearch());
+	}
+
+	/**
+	 * @dataProvider provideMultipleKeywordSearch
+	 * @param string $search
+	 * @param string $expected_values
+	 */
+	public function testParseSearch_whenMultipleKeywords_returnArrayWithMultipleValues($search, $expected_values) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_values, $parsed_search);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function provideMultipleKeywordSearch() {
+		return array(
+		    array(
+			'intitle:word1 author:word2',
+			array(
+			    'intitle' => 'word1',
+			    'author' => 'word2',
+			),
+		    ),
+		    array(
+			'author:word2 intitle:word1',
+			array(
+			    'intitle' => 'word1',
+			    'author' => 'word2',
+			),
+		    ),
+		    array(
+			'author:word1 inurl:word2',
+			array(
+			    'author' => 'word1',
+			    'inurl' => 'word2',
+			),
+		    ),
+		    array(
+			'inurl:word2 author:word1',
+			array(
+			    'author' => 'word1',
+			    'inurl' => 'word2',
+			),
+		    ),
+		    array(
+			'date:2008-01-01/2008-02-01 pubdate:2007-01-01/2007-02-01',
+			array(
+			    'min_date' => '1199163600',
+			    'max_date' => '1201928399',
+			    'min_pubdate' => '1167627600',
+			    'max_pubdate' => '1170392399',
+			),
+		    ),
+		    array(
+			'pubdate:2007-01-01/2007-02-01 date:2008-01-01/2008-02-01',
+			array(
+			    'min_date' => '1199163600',
+			    'max_date' => '1201928399',
+			    'min_pubdate' => '1167627600',
+			    'max_pubdate' => '1170392399',
+			),
+		    ),
+		    array(
+			'inurl:word1 author:word2 intitle:word3 pubdate:2007-01-01/2007-02-01 date:2008-01-01/2008-02-01 hello world',
+			array(
+			    'inurl' => 'word1',
+			    'author' => 'word2',
+			    'intitle' => 'word3',
+			    'min_date' => '1199163600',
+			    'max_date' => '1201928399',
+			    'min_pubdate' => '1167627600',
+			    'max_pubdate' => '1170392399',
+			    'search' => 'hello world',
+			),
+		    ),
+		);
+	}
+
+	/**
+	 * @dataProvider provideIntitleSearch
+	 * @param string $search
+	 * @param string $expected_value
+	 */
+	public function testParseSearch_whenIntitleKeyword_returnArrayWithIntitleValue($search, $expected_value) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_value, $parsed_search['intitle']);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function provideIntitleSearch() {
+		return array(
+		    array('intitle:word1', 'word1'),
+		    array('intitle:word1 word2', 'word1'),
+		    array('intitle:"word1 word2"', 'word1 word2'),
+		    array("intitle:'word1 word2'", 'word1 word2'),
+		    array('word1 intitle:word2', 'word2'),
+		    array('word1 intitle:word2 word3', 'word2'),
+		    array('word1 intitle:"word2 word3"', 'word2 word3'),
+		    array("word1 intitle:'word2 word3'", 'word2 word3'),
+		    array('intitle:word1 intitle:word2', 'word1'),
+		    array('intitle: word1 word2', ''),
+		    array('intitle:123', '123'),
+		    array('intitle:"word1 word2" word3"', 'word1 word2'),
+		    array("intitle:'word1 word2' word3'", 'word1 word2'),
+		    array('intitle:"word1 word2\' word3"', "word1 word2' word3"),
+		    array("intitle:'word1 word2\" word3'", 'word1 word2" word3'),
+		);
+	}
+
+	/**
+	 * @dataProvider provideAuthorSearch
+	 * @param string $search
+	 * @param string $expected_value
+	 */
+	public function testParseSearch_whenAuthorKeyword_returnArrayWithAuthorValue($search, $expected_value) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_value, $parsed_search['author']);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function provideAuthorSearch() {
+		return array(
+		    array('author:word1', 'word1'),
+		    array('author:word1 word2', 'word1'),
+		    array('author:"word1 word2"', 'word1 word2'),
+		    array("author:'word1 word2'", 'word1 word2'),
+		    array('word1 author:word2', 'word2'),
+		    array('word1 author:word2 word3', 'word2'),
+		    array('word1 author:"word2 word3"', 'word2 word3'),
+		    array("word1 author:'word2 word3'", 'word2 word3'),
+		    array('author:word1 author:word2', 'word1'),
+		    array('author: word1 word2', ''),
+		    array('author:123', '123'),
+		    array('author:"word1 word2" word3"', 'word1 word2'),
+		    array("author:'word1 word2' word3'", 'word1 word2'),
+		    array('author:"word1 word2\' word3"', "word1 word2' word3"),
+		    array("author:'word1 word2\" word3'", 'word1 word2" word3'),
+		);
+	}
+
+	/**
+	 * @dataProvider provideInurlSearch
+	 * @param string $search
+	 * @param string $expected_value
+	 */
+	public function testParseSearch_whenInurlKeyword_returnArrayWithInurlValue($search, $expected_value) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_value, $parsed_search['inurl']);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function provideInurlSearch() {
+		return array(
+		    array('inurl:word1', 'word1'),
+		    array('inurl: word1', ''),
+		    array('inurl:123', '123'),
+		    array('inurl:word1 word2', 'word1'),
+		    array('inurl:"word1 word2"', '"word1'),
+		);
+	}
+
+	/**
+	 * @dataProvider provideDateSearch
+	 * @param string $search
+	 * @param string $expected_min_value
+	 * @param string $expected_max_value
+	 */
+	public function testParseSearch_whenDateKeyword_returnArrayWithDateValues($search, $expected_min_value, $expected_max_value) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_min_value, $parsed_search['min_date']);
+		$this->assertEquals($expected_max_value, $parsed_search['max_date']);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function provideDateSearch() {
+		return array(
+		    array('date:2007-03-01T13:00:00Z/2008-05-11T15:30:00Z', '1172754000', '1210519800'),
+		    array('date:2007-03-01T13:00:00Z/P1Y2M10DT2H30M', '1172754000', '1210516199'),
+		    array('date:P1Y2M10DT2H30M/2008-05-11T15:30:00Z', '1172757601', '1210519800'),
+		    array('date:2007-03-01/2008-05-11', '1172725200', '1210564799'),
+		    array('date:2007-03-01/', '1172725200', ''),
+		    array('date:/2008-05-11', '', '1210564799'),
+		);
+	}
+
+	/**
+	 * @dataProvider providePubdateSearch
+	 * @param string $search
+	 * @param string $expected_min_value
+	 * @param string $expected_max_value
+	 */
+	public function testParseSearch_whenPubdateKeyword_returnArrayWithPubdateValues($search, $expected_min_value, $expected_max_value) {
+		FreshRSS_Context::$search = $search;
+		$parsed_search = $this->context->parseSearch();
+		$this->assertEquals($expected_min_value, $parsed_search['min_pubdate']);
+		$this->assertEquals($expected_max_value, $parsed_search['max_pubdate']);
+	}
+
+	/**
+	 * @return array
+	 */
+	public function providePubdateSearch() {
+		return array(
+		    array('pubdate:2007-03-01T13:00:00Z/2008-05-11T15:30:00Z', '1172754000', '1210519800'),
+		    array('pubdate:2007-03-01T13:00:00Z/P1Y2M10DT2H30M', '1172754000', '1210516199'),
+		    array('pubdate:P1Y2M10DT2H30M/2008-05-11T15:30:00Z', '1172757601', '1210519800'),
+		    array('pubdate:2007-03-01/2008-05-11', '1172725200', '1210564799'),
+		    array('pubdate:2007-03-01/', '1172725200', ''),
+		    array('pubdate:/2008-05-11', '', '1210564799'),
+		);
+	}
+
+}