Messenger: detect emoji in text and display an error message

CHANGELOG.txt

@@ -56,6 +56,7 @@ v27.0.00
         Markbook: removed non-numeric entries from cumulative totals
         Messenger: added search form and school year navigator to Manage Groups page for quicker group browsing
         Messenger: added an index to the Message Target table to speed up the recipients query
+        Messenger: added the ability to remove emojis from the message body
         Reports: updated report writing to also show left class enrolments with the Show Left Students tool
         Reports: added uploadable Image as a field type in Manage Criteria Types
         Reports: added a check for the correct .twig.html extension in Manage Assets

modules/Messenger/messenger_manage_editProcess.php

@@ -29,6 +29,9 @@
 
 require_once '../../gibbon.php';
 
+//Module includes
+include './moduleFunctions.php';
+
 $gibbonMessengerID = $_POST['gibbonMessengerID'] ?? '';
 $sendTestEmail = $_POST['sendTestEmail'] ?? '';
 $search = $_GET['search'] ?? '';
@@ -112,6 +115,14 @@
         exit;
     }
 
+    // Check for any emojis in the message
+    $containsEmoji = hasEmojis($data['body']);
+
+    // Remove any emojis from the message
+    if($containsEmoji) { 
+        $data['body'] = removeEmoji($data['body']);
+    }
+
     // Write to database
     $updated = $messengerGateway->update($gibbonMessengerID, $data);
     if (!$updated) {
@@ -144,6 +155,10 @@
             exit;
         }
 
+        if($containsEmoji) {
+            $URLSend .= '&return=warning3';
+        }
+
         header("Location: {$URLSend}");
         exit;
     } elseif ($saveMode == 'Preview' && $data['messageWall'] == 'Y') {

modules/Messenger/messenger_postProcess.php

@@ -29,6 +29,9 @@
 
 $_POST = $container->get(Validator::class)->sanitize($_POST, ['body' => 'HTML']);
 
+//Module includes
+include './moduleFunctions.php';
+
 $address = $_POST['address'] ?? '';
 $URL = $session->get('absoluteURL') . '/index.php?q=/modules/Messenger/messenger_manage_post.php&sidebar=true';
 $URLSend = $session->get('absoluteURL') . '/index.php?q=/modules/Messenger/messenger_send.php&sidebar=true';
@@ -81,6 +84,14 @@
         exit;
     }
 
+    // Check for any emojis in the message
+    $containsEmoji = hasEmojis($data['body']);
+
+    // Remove any emojis from the message
+    if($containsEmoji) { 
+        $data['body'] = removeEmoji($data['body']);
+    }
+
     // Insert the message and get the ID
     $gibbonMessengerID = $messengerGateway->insert($data);
 
@@ -106,6 +117,10 @@
             exit;
         }
 
+        if($containsEmoji) {
+            $URLSend .= '&return=warning3';
+        }
+
         header("Location: {$URLSend}");
         exit;
     } elseif ($saveMode == 'Preview' && $data['messageWall'] == 'Y') {

modules/Messenger/messenger_postQuickWallProcess.php

@@ -70,6 +70,14 @@
         $subject = $_POST['subject'] ?? '';
         $body = stripslashes($_POST['body'] ?? '');
 
+        //check for any emojis in the message
+        $containsEmoji = hasEmojis($body);
+
+        //remove any emojis from the message
+        if($containsEmoji) { 
+            $body = removeEmoji($body); 
+        }
+
         // Turn copy-pasted div breaks into paragraph breaks
         $body = str_ireplace(['<div ', '<div>', '</div>'], ['<p ', '<p>', '</p>'], $body);
 
@@ -111,6 +119,9 @@
             if ($partialFail == true) {
                 $URL .= '&return=warning1';
                 header("Location: {$URL}");
+            }else if($containsEmoji) {
+                $URL .= '&return=warning3';
+                header("Location: {$URL}");
             } else {
                 //Success 0
                 $session->set('pageLoads', null);

modules/Messenger/moduleFunctions.php

@@ -45,3 +45,17 @@ function getMessages($guid, $connection2, $mode = '', $date = '')
     global $container;
     return $container->get(MessengerGateway::class)->getMessages($mode, $date);
 }
+
+function hasEmojis($string) {
+
+    $regexEmoticons = '/[\x{1F300}-\x{1F5FF}\x{1F600}-\x{1F64F}\x{1F680}-\x{1F6FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}\x{1F900}-\x{1F9FF}\x{1F1E0}-\x{1F1FF}]/u';
+
+    return preg_match($regexEmoticons, $string) ? true : false;
+}
+
+function removeEmoji($text) {
+
+    $regexEmoticons = '/[\x{1F300}-\x{1F5FF}\x{1F600}-\x{1F64F}\x{1F680}-\x{1F6FF}\x{2600}-\x{26FF}\x{2700}-\x{27BF}\x{1F900}-\x{1F9FF}\x{1F1E0}-\x{1F1FF}]/u';
+
+    return preg_replace($regexEmoticons, '', $text);
+}

src/View/Components/ReturnMessage.php

@@ -59,6 +59,7 @@ public function __construct()
             'warning0' => __('Your optional extra data failed to save.'),
             'warning1' => __('Your request was successful, but some data was not properly saved.'),
             'warning2' => __('Your request was successful, but some data was not properly deleted.'),
+            'warning3' => __('Your request was successful but the emojis in your message have been removed'),
         ]);
     }