add captcha

addons/plugins/MSCaptcha/MSCaptchaController.class.php

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+<?php
+/**
+ * MSCaptcha by DaVchezt
+ **/
+if (!defined("IN_ESOTALK")) exit;
+
+Class MSCaptchaController extends ETController {
+	protected $width = 110;
+	protected $height = 45;
+	protected $font = '/font/League_Gothic.ttf';
+	protected $font_size = 20;
+	protected $font_colors = array(0, 50, 100, 150, 200);
+
+	public function action_index()
+	{
+		// ttf font
+		$this->font = dirname(__FILE__) . $this->font;
+		// Create the image
+		$src = imagecreatetruecolor($this->width, $this->height);
+		// Create white color
+		$white = imagecolorallocate($src, 255, 255, 255);
+		imagefill($src, 0, 0, $white);
+		//Prevent the spider use the same number as captcha to register automaticly.
+		$cc = ET::$session->get('inputmscaptha');
+        $errnum = ET::$session->get('capthaerrnum');
+        if(!$errnum) $errnum = 0;
+		while (true){
+			// Get the code
+            $x = array_rand(array("+","*"),1);
+            if($x == 0){
+				// Genrate random number
+				$a = rand(10, 50);
+				$b = rand(10, 50);
+				$c = $a + $b;
+            }else{
+                $a = rand(5, 10);
+				$b = rand(5, 10);
+                $c = $a * $b;
+            }
+            //增大恶意刷注册撞中的难度
+            if($errnum > 5){
+                $x = 1;
+                $a = rand(5, 20);
+				$b = rand(5, 20);
+                $c = $a * $b;
+            }
+            if($errnum > 15){
+                $x = 1;
+                $a = rand(50, 99);
+				$b = rand(50, 99);
+                $c = $a * $b;
+            }
+			if ($c != $cc) break;
+		}
+		// Genrate session of code
+		ET::$session->store('mscaptcha', $c);
+
+        $arr = array($a, $x==0?'+':' x ', $b, '=', '?');
+		// Create Image from code
+		for($i = 0; $i < count($arr); $i++) {
+			$color = imagecolorallocatealpha(
+				$src,
+				$this->font_colors[rand(0, count($this->font_colors) - 1)],
+				$this->font_colors[rand(0, count($this->font_colors) - 1)],
+				$this->font_colors[rand(0, count($this->font_colors) - 1)],
+				rand(0, 50)
+			);
+			imagettftext(
+				$src,
+				$this->font_size,
+				0,
+				($this->font_size * ($i + 1)) - 10,
+				(($this->height * 2) / 3) + 3,
+				$color,
+				$this->font,
+				$arr[$i]
+			);
+		}
+		header("Content-type: image/png");
+		imagepng($src);
+		imagedestroy($src);
+	}
+
+}

addons/plugins/MSCaptcha/README.md

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+MSCaptcha
+=========
+
+Just simple captcha for esoTalk
+
+
+![Preview 1](http://esotalk.org/forum/attachment/54092490367b7_captcha.png)

addons/plugins/MSCaptcha/plugin.php

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+<?php
+// This file is part of esoTalk. Please see the included license file for usage information.
+
+if (!defined("IN_ESOTALK")) exit;
+
+ET::$pluginInfo["MSCaptcha"] = array(
+	"name" => "MSCaptcha",
+	"description" => "Just simple captcha.",
+	"version" => ESOTALK_VERSION,
+	"author" => "DaVchezt",
+	"authorEmail" => "[email protected]",
+	"authorURL" => "http://davchezt.tumblr.com",
+	"license" => "GPLv2"
+);
+
+class ETPlugin_MSCaptcha extends ETPlugin {
+
+	public function __construct($rootDirectory)
+	{
+		parent::__construct($rootDirectory);
+
+		ETFactory::registerController("mscaptcha", "MSCaptchaController", dirname(__FILE__)."/MSCaptchaController.class.php");
+	}
+
+	public function handler_init($sender)
+	{
+		$sender->addCSSFile($this->Resource("mscaptcha.css"));
+		$sender->addJSFile($this->Resource("mscaptcha.js"));
+	}
+
+	public function handler_userController_initJoin($controller, $form)
+	{
+		$form->addSection("mscaptcha", T("Solve this"));
+
+		$form->addField("mscaptcha", "mscaptcha", function($form)
+		{
+			return "<div class=\"mscaptcha\"><img class=\"img-mscaptcha\" src=\"".URL("mscaptcha")."\" alt=\"MSCaptcha\"><i class=\"icon-spinner mscaptcha-loader\" style=\"display:none;\"> loading...</i><br /><a id=\"mscaptcha-refresh\" href=\"#\" class=\"button\"><i class=\"icon-refresh\"></i></a>".$form->input("mscaptcha")."</div>";
+		},
+		function($form, $key, &$data)
+		{
+			if (ET::$session->get('mscaptcha') != $form->getValue($key)) {
+				ET::$session->store('inputmscaptha', $form->getValue($key));
+                if(!($err = ET::$session->get('capthaerrnum'))) $err = 0;
+                $err++;
+                ET::$session->store('capthaerrnum', $err);
+				$form->error($key, T("Invalid!, You need calculator? :D"));
+			}
+		});
+	}
+
+}

addons/plugins/MSCaptcha/resources/mscaptcha.css

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+.mscaptcha img {
+	border: 1px solid #ddd;
+	-webkit-border-radius: 4px;
+	-moz-border-radius: 4px;
+	border-radius: 4px;
+	border-radius: 4px;
+}
+.mscaptcha a.button {
+	height: 13px;
+	border: 1px solid #ddd;
+	-webkit-border-radius: 4px 0 0 4px;
+	-moz-border-radius: 4px 0 0 4px;
+	border-radius: 4px 0 0 4px;
+}
+.mscaptcha input {
+	width: 63px !important;
+	height: 19px;
+	border: 1px solid #ddd;
+	-webkit-border-radius: 0 4px 4px 0;
+	-moz-border-radius: 0 4px 4px 0;
+	border-radius: 0 4px 4px 0;
+	margin-left: -1px !important;
+	margin-top: 1px !important;
+}
+.mscaptcha-loader {
+	position: relative;
+	top: -20px;
+	right: -10px;
+}

addons/plugins/MSCaptcha/resources/mscaptcha.js

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+$('document').ready(function() {
+	$('#mscaptcha-refresh').click(function (e) {
+		e.preventDefault();
+		$('.mscaptcha-loader').show();
+		$('.img-mscaptcha').load(function () {
+			$('.mscaptcha-loader').hide();
+		}).attr('src', ET.webPath + '/mscaptcha?' + (Math.random() * 5));
+	});
+});