1 files changed, 47 insertions, 0 deletions
diff --git a/apps/um/plugins/ReCaptcha.class.php b/apps/um/plugins/ReCaptcha.class.php
new file mode 100644
index 0000000..165493b
--- /dev/null
+++ b/apps/um/plugins/ReCaptcha.class.php
@@ -0,0 +1,47 @@
+<?php
+// We only include the recaptchalib.php file when we use it because we don't
+// want it polluting the global namespace thing.
+
+class ReCaptcha extends Plugin {
+	protected $config = array('public_key'=>'',
+	                          'private_key'=>'');
+	public static function description() {
+		return 'Add a reCaptcha to keep out spam users.';
+	}
+	public static function configList() {
+		return array('public_key'=>'text',
+		             'private_key'=>'text');
+	}
+	public function init() {}
+
+	private $resp = null;
+	private function getResp() {
+		if ($this->resp===null) {
+			require_once('recaptchalib.php');
+			@$response = $_POST['recaptcha_response_field'];
+			@$challenge = $_POST['recaptcha_challenge_field'];
+			$this->resp = recaptcha_check_answer($this->config['private_key'],
+			                                     $_SERVER['REMOTE_ADDR'],
+			                                     $challenge,
+			                                     $response);
+		}
+		return $this->resp;
+	}
+
+	private function getError() {
+		if ($_POST["recaptcha_response_field"] && !$this->antispam_verify()) {
+			return $this->getResp()->error;
+		} else {
+			return false;
+		}
+	}
+
+	public function antispam_verify() {
+		return $this->getResp()->is_valid;
+	}
+	
+	public function antispam_html() {
+		require_once('recaptchalib.php');
+		return recaptcha_get_html($this->config['public_key'], $this->getError());
+	}
+}