feat(contact-handler.php): manager other e-mails from POST

src/form/contact-form-handler.php

@@ -7,6 +7,21 @@ $mail = new PHPMailer(true);
 
 $errors = '';
 $myEmail = getenv('ASTRO_SMTP_FROM');
+$myEmailSplitted = explode('@', $myEmail);
+$domainFromMyEmail = (
+    empty($myEmailSplitted[1])
+    || count($myEmailSplitted) != 2
+) ? ''
+: $myEmailSplitted[1];
+
+$wantedContact = filter_input(INPUT_POST, 'contactTo', FILTER_VALIDATE_EMAIL);
+if (
+    empty($wantedContact)
+    || empty($domainFromMyEmail)
+    || substr($wantedContact, -strlen($domainFromMyEmail)) != $domainFromMyEmail
+) {
+    $wantedContact = $myEmail;
+}
 
 if(empty($_POST['namezzz']) || empty($_POST['emailzzz']) || empty($_POST['message'])) {
     $errors .= "\n Error: all fields are required";
@@ -27,7 +42,6 @@ if (!filter_var($emailAddress, FILTER_VALIDATE_EMAIL)) {
 }
 
 if(empty($errors)) {
-    $to = $myEmail;
     $emailSubject = "[Formulaire Astrolabe] Nouveau message";
 
     switch ($select) {
@@ -66,7 +80,7 @@ if(empty($errors)) {
             
     //Recipients
     $mail->setFrom($myEmail);
-    $mail->addAddress($myEmail);
+    $mail->addAddress($wantedContact);
     $mail->addReplyTo($emailAddress, $name);
             
     // Content