add multi filter support

src/Taskwarrior.php

@@ -76,11 +76,15 @@ class Taskwarrior
     }
 
     /**
-     * @param $filter
+     * @param string|array $filter
      * @return Task[]
      */
-    public function filterAll($filter = '')
+    public function filterAll($filter = null)
     {
+        if (is_string($filter)) {
+            $filter = explode(' ', $filter);
+        }
+
         $result = $this->export($filter);
 
         foreach ($result as $key => $task) {
@@ -98,10 +102,10 @@ class Taskwarrior
     }
 
     /**
-     * @param string $filter
+     * @param string|array $filter
      * @return Task[]
      */
-    public function filter($filter = '')
+    public function filter($filter = null)
     {
         $tasks = $this->filterAll($filter . ' status:pending');
 
@@ -164,10 +168,10 @@ class Taskwarrior
     }
 
     /**
-     * @param string $filter
+     * @param string|array $filter
      * @return Task[]
      */
-    private function export($filter = '')
+    private function export($filter = null)
     {
         $json = $this->command('export', $filter);
 
@@ -180,17 +184,25 @@ class Taskwarrior
 
     /**
      * @param string       $command
-     * @param string $filter
+     * @param string|array $filter
      * @param array        $options
      * @return string
      * @throws TaskwarriorException
      */
-    private function command($command, $filter = null, $options = array())
+    private function command($command, $filter = null, array $options = array())
     {
         $builder = $this->createProcessBuilder();
 
-        if ($filter) {
-            $builder->add($filter);
+        if (!is_array($filter)) {
+            $filter = [$filter];
+        }
+
+        foreach ($filter as $param) {
+            if (empty($param)) {
+                continue;
+            }
+
+            $builder->add($param);
         }
 
         $builder->add($command);
@@ -264,13 +276,16 @@ class Taskwarrior
      */
     private function sort(array $tasks)
     {
-        usort($tasks, function (Task $a, Task $b) {
+        usort(
+            $tasks,
+            function (Task $a, Task $b) {
                 if (0 != $diff = $b->getUrgency() - $a->getUrgency()) {
                     return $diff;
                 }
 
                 return $a->getEntry() >= $b->getEntry() ? 1 : -1;
-        });
+            }
+        );
 
         return $tasks;
     }

tests/TaskwarriorTest.php

@@ -116,6 +116,20 @@ class TaskwarriorTest extends \PHPUnit_Framework_TestCase
         $this->assertCount(2, $this->taskwarrior->filter());
     }
 
+    public function testMultiFilter()
+    {
+        $task1 = new Task();
+        $task1->setDescription('foo1');
+
+        $task2 = new Task();
+        $task2->setDescription('foo2');
+
+        $this->taskwarrior->save($task1);
+        $this->taskwarrior->save($task2);
+
+        $this->assertCount(2, $this->taskwarrior->filter('status:pending')); // todo better test
+    }
+
     public function testPending()
     {
         $task1 = new Task();