From db3cb85d0992dd49ca2fdf33ea35c0cad60e312f Mon Sep 17 00:00:00 2001
From: Luke Shumaker <LukeShu@sbcglobal.net>
Date: Thu, 22 Sep 2011 23:26:59 -0400
Subject: Implement ReCaptcha entirely as a plugin, remove all of the ugliness
 from my old implementation.

---
 src/controllers/Users.class.php    | 22 ++++++++--------------
 src/lib/Plugin.class.php           |  3 +++
 src/plugins/ReCaptcha.class.php    | 33 +++++++++++++++++++++++++++++++++
 src/views/pages/users/new.html.php | 10 +++-------
 4 files changed, 47 insertions(+), 21 deletions(-)

diff --git a/src/controllers/Users.class.php b/src/controllers/Users.class.php
index ed6f739..a0eebdb 100644
--- a/src/controllers/Users.class.php
+++ b/src/controllers/Users.class.php
@@ -60,6 +60,8 @@ class Users extends Controller {
 		// since there will never be a remainder to `users/new', we can
 		// use that parameter to pass in some data.
 		if (!isset($vars['errors'])) $vars['errors'] = array();
+		global $mm; $pm = $mm->pluginManager();
+		$vars['antispam_html'] = $pm->callHook('antispam_html');
 		$this->showView('users/new', $vars);
 	}
 	
@@ -124,16 +126,14 @@ class Users extends Controller {
 	 * explained.
 	 */
 	private function create_user() {
+		global $mm;
+		$db = $mm->database();
+		$pm = $mm->pluginManager();
+		
 		$vars = array();
 		@$vars['username' ] = $_POST['auth_name'];
 		@$vars['password1'] = $_POST['auth_password'       ];
 		@$vars['password2'] = $_POST['auth_password_verify'];
-		@$recaptcha_response = $_POST['recaptcha_response_field'];
-		@$recaptcha_challenge = $_POST['recaptcha_challenge_field'];
-		
-		global $mm; $db = $mm->database();
-		$publickey  = $db->getPluginConf('ReCaptcha', 'public_key');
-		$privatekey = $db->getPluginConf('ReCaptcha', 'private_key');
 		
 		$vars['errors'] = array();
 		if ($db->getUID($vars['username'])!==false)
@@ -147,14 +147,8 @@ class Users extends Controller {
 		if ($matches && $vars['password2'] == '') {
 			$vars['errors'][] = 'no pw';
 		}
-		require_once('recaptchalib.php');
-		$resp = recaptcha_check_answer($privatekey,
-		                               $_SERVER['REMOTE_ADDR'],
-		                               $recaptcha_challenge,
-		                               $recaptcha_response);
-		if (!$resp->is_valid) {
-			$vars['errors'][] = 'recaptcha';
-			$vars['recaptcha_error'] = $resp->error;
+		foreach ($pm->callHook('antispam_verify') as $plugin=>$valid) {
+			if (!$valid) $vars['errors'][] = 'plugin_'.$plugin;
 		}
 		
 		if (count($vars['errors']) > 0) {
diff --git a/src/lib/Plugin.class.php b/src/lib/Plugin.class.php
index 8c7fad8..9d2fc2e 100644
--- a/src/lib/Plugin.class.php
+++ b/src/lib/Plugin.class.php
@@ -19,4 +19,7 @@ abstract class Plugin {
 	}
 	
 	public abstract function init();
+	
+	public function antispam_html() { return ''; }
+	public function antispam_verify() { return true; }
 }
diff --git a/src/plugins/ReCaptcha.class.php b/src/plugins/ReCaptcha.class.php
index c25147f..165493b 100644
--- a/src/plugins/ReCaptcha.class.php
+++ b/src/plugins/ReCaptcha.class.php
@@ -1,4 +1,6 @@
 <?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'=>'',
@@ -11,4 +13,35 @@ class ReCaptcha extends Plugin {
 		             '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());
+	}
 }
diff --git a/src/views/pages/users/new.html.php b/src/views/pages/users/new.html.php
index 326f0bc..147e3c0 100644
--- a/src/views/pages/users/new.html.php
+++ b/src/views/pages/users/new.html.php
@@ -30,13 +30,9 @@ if (in_array('no pw', $VARS['errors'])) {
 $t->inputNewPassword('auth_password','Password', $password);
 $t->closeFieldset();
 
-global $mm; $db = $mm->database();
-$public_key = $db->getPluginConf('ReCaptcha', 'public_key');
-$recaptcha_error = null;
-if (isset($VARS['recaptcha_error']))
-	$recaptcha_error = $VARS['recaptcha_error'];
-require_once('recaptchalib.php');
-echo recaptcha_get_html($public_key, $recaptcha_error);
+foreach ($VARS['antispam_html'] as $html) {
+	echo $html;
+}
 
 $t->tag('input', array('type'=>'submit', 'value'=>'Submit'));
 
-- 
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