change invalid numbers

Author: rezaei121

Captcha.php

@@ -0,0 +1,19 @@
+<?php
+namespace developit\captcha;
+use Yii;
+use developit\captcha\yii2CaptchaAsset;
+
+class Captcha extends \yii\captcha\Captcha
+{
+    public function run()
+    {
+        $this->registerClientScript();
+        parent::run();
+    }
+
+    public function registerClientScript()
+    {
+        yii2CaptchaAsset::register(Yii::$app->getView());
+        parent::registerClientScript();
+    }
+}

CaptchaAction.php

@@ -1,13 +1,37 @@
 <?php
 
 namespace developit\captcha;
+use Yii;
+use yii\helpers\Url;
+use yii\web\Response;
 
 class CaptchaAction extends \yii\captcha\CaptchaAction
 {
     public $fontFile = '@developit/captcha/font/LithosPro-Regular.otf';
     public $foreColor = 0x999999;
     public $type = 'default'; // numbers & letters
 
+    public function run()
+    {
+        if (Yii::$app->request->getQueryParam(self::REFRESH_GET_VAR) !== null) {
+            // AJAX request for regenerating code
+            $code = $this->getVerifyCode(true);
+            Yii::$app->response->format = Response::FORMAT_JSON;
+            return [
+                'hash1' => $this->generateValidationHash($code),
+                'hash2' => $this->generateValidationHash(strtolower($code)),
+                // we add a random 'v' parameter so that FireFox can refresh the image
+                // when src attribute of image tag is changed
+                'url' => Url::to([$this->id, 'v' => uniqid()]),
+            ];
+        } else {
+            $this->setHttpHeaders();
+            Yii::$app->response->format = Response::FORMAT_RAW;
+            return $this->renderImage($this->getVerifyCode());
+        }
+//        $view->registerJs('yii.captcha.validation.js');
+    }
+
     protected function generateVerifyCode()
     {
         if ($this->minLength > $this->maxLength) {
@@ -39,4 +63,31 @@ protected function generateVerifyCode()
 
         return $code;
     }
+
+    public function validate($input, $caseSensitive)
+    {
+        $input = $this->_changeInvalidNumbers($input);
+        $code = $this->getVerifyCode();
+        $valid = $caseSensitive ? ($input === $code) : strcasecmp($input, $code) === 0;
+        $session = Yii::$app->getSession();
+        $session->open();
+        $name = $this->getSessionKey() . 'count';
+        $session[$name] = $session[$name] + 1;
+        if ($valid || $session[$name] > $this->testLimit && $this->testLimit > 0) {
+            $this->getVerifyCode(true);
+        }
+
+        return $valid;
+    }
+
+    private function _changeInvalidNumbers($input)
+    {
+        $enNumbers = ['0','1','2','3','4','5','6','7','8','9'];
+        $faNumbers = ['۰','۱','۲','۳','۴','۵','۶','۷','۸','۹'];
+        $arNumbers = ['٠','١','٢','٣','٤','٥','٦','٧','٨','٩'];
+        $input = str_replace($faNumbers,$enNumbers,$input);
+        $input = str_replace($arNumbers,$enNumbers,$input);
+
+        return $input;
+    }
 }

README.md

@@ -11,13 +11,13 @@ The preferred way to install this extension is through [composer](http://getcomp
 Either run
 
 ```
-php composer.phar require --prefer-dist developit/yii2-captcha "dev-master"
+php composer.phar require --prefer-dist developit/yii2-captcha "*"
 ```
 
 or add
 
 ```
-"developit/yii2-captcha": "dev-master"
+"developit/yii2-captcha": "*"
 ```
 
 to the require section of your `composer.json` file.
@@ -48,6 +48,7 @@ Once the extension is installed, simply modify your controler, add or change met
 
 In view
 ```php
+use developit\captcha\Captcha;
 <?=
 $form->field($model, 'verifyCode')->widget(Captcha::className())
 ?>

assets/yii.captcha.validation.js

@@ -0,0 +1,52 @@
+var validation = yii.validation;
+
+validation.changeInvalidNumbers = function(input){
+    var enNumbers = {
+        '۰': '0',
+        '۱': '1',
+        '۲': '2',
+        '۳': '3',
+        '۴': '4',
+        '۵': '5',
+        '۶': '6',
+        '۷': '7',
+        '۸': '8',
+        '۹': '9',
+        '٠': '0',
+        '١': '1',
+        '٢': '2',
+        '٣': '3',
+        '٤': '4',
+        '٥': '5',
+        '٦': '6',
+        '٧': '7',
+        '٨': '8',
+        '٩': '9',
+    }
+    input = input.replace(/[۰-۹٠-٩]/g,function (i) {
+        return enNumbers[i];
+    });
+    return input;
+};
+validation.captcha = function (value, messages, options) {
+    value = validation.changeInvalidNumbers(value);
+    if (options.skipOnEmpty && pub.isEmpty(value)) {
+        return;
+    }
+
+    // CAPTCHA may be updated via AJAX and the updated hash is stored in body data
+    var hash = $('body').data(options.hashKey);
+    if (hash == null) {
+        hash = options.hash;
+    } else {
+        hash = hash[options.caseSensitive ? 0 : 1];
+    }
+    var v = options.caseSensitive ? value : value.toLowerCase();
+    for (var i = v.length - 1, h = 0; i >= 0; --i) {
+        h += v.charCodeAt(i);
+    }
+    if (h != hash) {
+        validation.addMessage(messages, options.message, value);
+    }
+};
+

yii2CaptchaAsset.php

@@ -0,0 +1,14 @@
+<?php
+namespace developit\captcha;
+
+use yii\web\AssetBundle;
+use Yii;
+
+class yii2CaptchaAsset extends AssetBundle
+{
+    public $sourcePath = '@vendor/developit/yii2-captcha/assets';
+    public $js = ['yii.captcha.validation.js'];
+    public $depends = [
+        'yii\web\YiiAsset',
+    ];
+}