added filter method to INPUT class

the filter() function can be chained between the accessor and the value
function to get a filtered value. When no filter allable is given in the
filter() function, stripctl() is used to strip all control chars (ASCII<32)

Examples:

  $INPUT->post->filter()->str('foobar');
  $INPUT->get->filter('myfilter')->int('baz');

1 files changed, 50 insertions, 0 deletions

diff --git a/_test/tests/inc/input.test.php b/_test/tests/inc/input.test.php
index cec0b80f6..4a8fb8d71 100644
--- a/_test/tests/inc/input.test.php
+++ b/_test/tests/inc/input.test.php
@@ -14,8 +14,58 @@ class input_test extends DokuWikiTest {
         'empty'  => '',
         'emptya' => array(),
         'do'     => array('save' => 'Speichern'),
+
     );
 
+    /**
+     * custom filter function
+     *
+     * @param $string
+     * @return mixed
+     */
+    public function myfilter($string) {
+        $string = str_replace('foo', 'bar', $string);
+        $string = str_replace('baz', '', $string);
+        return $string;
+    }
+
+    public function test_filter() {
+        $_GET     = array(
+            'foo'    => 'foo',
+            'zstring'=> "foo\0bar",
+            'znull'  => "\0",
+            'zint'   => '42'."\0".'42',
+            'zintbaz'=> "baz42",
+        );
+        $_POST    = $_GET;
+        $_REQUEST = $_GET;
+        $INPUT    = new Input();
+
+        $filter = array($this,'myfilter');
+
+        $this->assertNotSame('foobar', $INPUT->str('zstring'));
+        $this->assertSame('foobar', $INPUT->filter()->str('zstring'));
+        $this->assertSame('bar', $INPUT->filter($filter)->str('foo'));
+        $this->assertSame('bar', $INPUT->filter()->str('znull', 'bar', true));
+        $this->assertNotSame('foobar', $INPUT->str('zstring')); // make sure original input is unmodified
+
+        $this->assertNotSame('foobar', $INPUT->get->str('zstring'));
+        $this->assertSame('foobar', $INPUT->get->filter()->str('zstring'));
+        $this->assertSame('bar', $INPUT->get->filter($filter)->str('foo'));
+        $this->assertSame('bar', $INPUT->get->filter()->str('znull', 'bar', true));
+        $this->assertNotSame('foobar', $INPUT->get->str('zstring')); // make sure original input is unmodified
+
+        $this->assertNotSame(4242, $INPUT->int('zint'));
+        $this->assertSame(4242, $INPUT->filter()->int('zint'));
+        $this->assertSame(42, $INPUT->filter($filter)->int('zintbaz'));
+        $this->assertSame(42, $INPUT->filter()->str('znull', 42, true));
+
+        $this->assertSame(true, $INPUT->bool('znull'));
+        $this->assertSame(false, $INPUT->filter()->bool('znull'));
+
+        $this->assertSame('foobar', $INPUT->filter()->valid('zstring', array('foobar', 'bang')));
+    }
+
     public function test_str() {
         $_REQUEST      = $this->data;
         $_POST         = $this->data;