Add captcha to pre-chat survey

src/messenger/webim/client.php

@@ -65,6 +65,16 @@ if( !isset($_GET['token']) || !isset($_GET['thread']) ) {
 			$info = getparam("info");
 			$email = getparam("email");
 			$referrer = urldecode(getparam("referrer"));
+			if ($settings["surveyaskcaptcha"] == "1") {
+				$captcha = getparam('captcha');
+				$original = isset($_SESSION["mibew_captcha"])
+					? $_SESSION["mibew_captcha"]
+					: "";
+				$survey_captcha_failed = empty($original)
+					|| empty($captcha)
+					|| $captcha != $original;
+				unset($_SESSION['mibew_captcha']);
+			}
 
 			if($settings['usercanchangename'] == "1" && isset($_POST['name'])) {
 				$newname = getparam("name");
@@ -93,10 +103,18 @@ if( !isset($_GET['token']) || !isset($_GET['thread']) ) {
 			exit;
 		}
 
-		if($settings['enablepresurvey'] == '1' && !(isset($_POST['survey']) && $_POST['survey'] == 'on')) {
+		$show_survey = $settings['enablepresurvey'] == '1'
+			&& (
+			    !(isset($_POST['survey']) && $_POST['survey'] == 'on')
+			    || ($settings["surveyaskcaptcha"] == "1" && !empty($survey_captcha_failed))
+			);
+		if($show_survey) {
 			$page = array();
 			setup_logo();
-			setup_survey($visitor['name'], $email, $groupid, $info, $referrer);
+			if (!empty($survey_captcha_failed)) {
+			    $errors[] = getlocal('errors.captcha');
+			}
+			setup_survey($visitor['name'], $email, $groupid, $info, $referrer, can_show_captcha());
 			expand("styles", getchatstyle(), "survey.tpl");
 			exit;
 		}

src/messenger/webim/libs/chat.php

@@ -308,7 +308,7 @@ function setup_leavemessage($name, $email, $message, $groupid, $groupname, $info
 	$page['referrer'] = urlencode(topage($referrer));
 }
 
-function setup_survey($name, $email, $groupid, $info, $referrer)
+function setup_survey($name, $email, $groupid, $info, $referrer, $canshowcaptcha)
 {
 	global $settings, $page;
 
@@ -317,6 +317,7 @@ function setup_survey($name, $email, $groupid, $info, $referrer)
 	$page['formgroupid'] = $groupid;
 	$page['forminfo'] = topage($info);
 	$page['referrer'] = urlencode(topage($referrer));
+	$page['showcaptcha'] = ($settings["surveyaskcaptcha"] == "1" && $canshowcaptcha) ? "1" : "";
 
 	if ($settings['enablegroups'] == '1' && $settings["surveyaskgroup"] == "1") {
 		$link = connect();

src/messenger/webim/libs/common.php

@@ -628,6 +628,7 @@ $settings = array(
 	'surveyaskmail' => '0',
 	'surveyaskgroup' => '1',
 	'surveyaskmessage' => '0',
+	'surveyaskcaptcha' => '0',
 	'enablepopupnotification' => '0',
 	'showonlineoperators' => '0',
 	'enablecaptcha' => '0',

src/messenger/webim/locales/en/properties

@@ -491,6 +491,8 @@ settings.saved=Changes saved
 settings.sendmessagekey=Send messages with:
 settings.show_online_operators.description=Can slow down the update rate of the list
 settings.show_online_operators=Show online operators on "List of awaiting visitors" page
+settings.survey.askcaptcha.description=Protection against automated spam (captcha)
+settings.survey.askcaptcha=Force visitor to enter a verification code
 settings.survey.askgroup.description=Show/hide department selection field in the survey
 settings.survey.askgroup=Allows a visitor to choose department/group 
 settings.survey.askmail.description=Show/hide email field in the survey

src/messenger/webim/locales/ru/properties

@@ -487,6 +487,8 @@ settings.saved=
 settings.sendmessagekey=Посылать сообщение по:
 settings.show_online_operators.description=Может замедлить обновление списка
 settings.show_online_operators=Показывать доступных операторов на странице ожидающих посетителей
+settings.survey.askcaptcha.description=Защита от автоматизированного спама (captcha)
+settings.survey.askcaptcha=Завершать опрос только после ввода специального кода с картинки
 settings.survey.askgroup.description=Показать/спрятать выбор группы в диалоге перед началом чата
 settings.survey.askgroup=Позволять посетителю выбирать группу операторов
 settings.survey.askmail.description=Показать/спрятать поле ввода адреса электронной почты

src/messenger/webim/operator/features.php

@@ -29,7 +29,7 @@ $options = array(
 	'enableban', 'usercanchangename', 'enablegroups', 'enablestatistics', 'enablejabber',
 	'enablessl', 'forcessl',
 	'enablepresurvey', 'surveyaskmail', 'surveyaskgroup', 'surveyaskmessage',
-	'enablepopupnotification', 'showonlineoperators',
+	'surveyaskcaptcha', 'enablepopupnotification', 'showonlineoperators',
 	'enablecaptcha');
 
 loadsettings();

src/messenger/webim/operator/themes.php

@@ -57,7 +57,7 @@ if ($show == 'chat' || $show == 'mail' || $show == 'leavemessage' || $show == 'l
 }
 if ($show == 'survey') {
 	loadsettings();
-	setup_survey("Visitor", "", "", "", "http://google.com");
+	setup_survey("Visitor", "", "", "", "http://google.com", false);
 	setup_logo();
 	expand("../styles", "$preview", "$show.tpl");
 	exit;

src/messenger/webim/styles/default/templates/survey.tpl

@@ -139,6 +139,12 @@ ${if:showmessage}
 				</td>
 			</tr>
 ${endif:showmessage}			
+${if:showcaptcha}
+			<tr>
+				<td class="text"><img src="captcha.php"/></td>
+				<td><input type="text" name="captcha" size="50" maxlength="15" value="" class="username"/></td>
+			</tr>
+${endif:showcaptcha}
 			<tr>
 				<td colspan="2" align="right">
 					<table cellspacing="0" cellpadding="0" border="0">

src/messenger/webim/styles/original/templates/survey.tpl

@@ -108,6 +108,15 @@ ${if:showmessage}
 		<tr><td height="7" colspan="3"></td></tr>
 ${endif:showmessage}			
 
+${if:showcaptcha}
+		<tr>
+		    <td class="text"><img src="captcha.php"/></td>
+		    <td width="20"></td>
+			<td><input type="text" name="captcha" size="50" maxlength="15" value="" class="field"/></td>
+		</tr>
+		<tr><td height="7" colspan="3"></td></tr>
+${endif:showcaptcha}
+
 	</table></td><td bgcolor="#E8A400"><img src="${webimroot}/images/free.gif" width="1" height="1" border="0" alt="" /></td></tr><tr><td><img class="tplimage icrnlb" src="${webimroot}/images/free.gif" border="0" alt=""/></td><td style="background-image: url(${tplroot}/images/winbg.gif)" class="bgcy"><img src="${webimroot}/images/free.gif" width="1" height="1" border="0" alt="" /></td><td><img class="tplimage icrnrb" src="${webimroot}/images/free.gif" border="0" alt=""/></td></tr></table>
 
 </td>

src/messenger/webim/styles/silver/templates/survey.tpl

@@ -39,7 +39,9 @@
 		</div></div></div></div></div></div></div></div>
 	</div>
 	<div id="content-wrapper">
-	
+		${if:errors}
+			${errors}
+		${endif:errors}
 		<form name="surveyForm" method="post" action="${webimroot}/client.php" />
 		<input type="hidden" name="style" value="${styleid}"/>
 		<input type="hidden" name="info" value="${form:info}"/>
@@ -72,6 +74,12 @@
 				<td valign="top"><textarea name="message" tabindex="0" cols="45" rows="2">${form:message}</textarea></td>
 			</tr>
 		${endif:showmessage}			
+                ${if:showcaptcha}
+                        <tr>
+                                <td><img src="captcha.php"/></td>
+                                <td><input type="text" name="captcha" size="50" maxlength="15" value="" class="username"/></td>
+                        </tr>
+                ${endif:showcaptcha}
 		</table>		
 		<a href="javascript:document.surveyForm.submit();" class="but" id="sndmessagelnk">${msg:presurvey.submit}</a>
 		<div class="clear">&nbsp;</div>

src/messenger/webim/styles/simplicity/templates/survey.tpl

@@ -63,6 +63,12 @@
 								<td><textarea name="message" class="field" tabindex="0" cols="45" rows="2" style="overflow:auto">${form:message}</textarea></td>
 							</tr>
 						${endif:showmessage}
+                                                ${if:showcaptcha}
+                                                    <tr>
+                                                            <td class="text"><img src="captcha.php"/></td>
+                                                            <td><input type="text" name="captcha" size="50" maxlength="15" value="" class="field"/></td>
+                                                    </tr>
+                                                ${endif:showcaptcha}
 					</table>
 				</td>
 			</tr>

src/messenger/webim/view/features.php

@@ -173,6 +173,15 @@ require_once('inc_errors.php');
 				<div class="fdescr"> &mdash; <?php echo getlocal('settings.survey.askmessage.description') ?></div>
 				<br clear="all"/>
 			</div>
+
+			<div class="subfield undersurvey">
+				<div class="flabel"><?php echo getlocal('settings.survey.askcaptcha') ?></div>
+				<div class="fvalue">
+					<input type="checkbox" name="surveyaskcaptcha" value="on"<?php echo form_value_cb('surveyaskcaptcha') ? " checked=\"checked\"" : "" ?><?php echo $page['canmodify'] ? "" : " disabled=\"disabled\"" ?>/>
+				</div>
+				<div class="fdescr"> &mdash; <?php echo getlocal('settings.survey.askcaptcha.description') ?></div>
+				<br clear="all"/>
+			</div>
 		</div>
 
 		<div class="field">