System: Do not send mails to inactive users - refs BT#21146 #4958

main/admin/email_tester.php

@@ -50,9 +50,15 @@ if ($form->validate()) {
         (!empty(api_get_mail_configuration_value('SMTP_UNIQUE_SENDER')) ? api_get_mail_configuration_value('SMTP_FROM_EMAIL') : $user->getEmail())
     );
 
-    Display::addFlash(
-        Display::return_message(get_lang('MailingTestSent'), 'success')
-    );
+    if ($mailIsSent) {
+        Display::addFlash(
+            Display::return_message(get_lang('MailingTestSent'), 'success')
+        );
+    } else {
+        Display::addFlash(
+            Display::return_message(get_lang('MailingTestNotSent'), 'error')
+        );
+    }
 
     header('Location: '.api_get_self());
     exit;

main/inc/lib/api.lib.php

@@ -9710,16 +9710,30 @@ function api_mail_html(
     if (is_array($recipient_email)) {
         foreach ($recipient_email as $dest) {
             if (api_valid_email($dest)) {
-                $mail->AddAddress($dest, $recipient_name);
+                if (UserManager::isEmailingAllowed($dest)) {
+                    // Do not send if user is not active = 1
+                    $mail->AddAddress($dest, $recipient_name);
+                }
+            } else {
+                // error_log('e-mail recipient '.$dest.' is not valid.');
+                return 0;
             }
         }
     } else {
         if (api_valid_email($recipient_email)) {
-            $mail->AddAddress($recipient_email, $recipient_name);
+            if (UserManager::isEmailingAllowed($recipient_email)) {
+                // Do not send if user is not active = 1
+                $mail->AddAddress($recipient_email, $recipient_name);
+            }
         } else {
+            // error_log('e-mail recipient '.$recipient_email.' is not valid.');
             return 0;
         }
     }
+    if (empty($mail->getAllRecipientAddresses())) {
+        // error_log('No valid and active destination e-mail in api_mail_html() with address '.print_r($recipient_email, 1).'. Not sending.');
+        return 0;
+    }
 
     if (is_array($extra_headers) && count($extra_headers) > 0) {
         foreach ($extra_headers as $key => $value) {

main/inc/lib/message.lib.php

@@ -553,11 +553,6 @@ class MessageManager
                 return false;
             }
 
-            // Disabling messages for inactive users.
-            if (0 == $receiverUserInfo['active']) {
-                return false;
-            }
-
             // Disabling messages depending the pausetraining plugin.
             $allowPauseFormation =
                 'true' === api_get_plugin_setting('pausetraining', 'tool_enable') &&

main/inc/lib/usermanager.lib.php

@@ -8073,4 +8073,56 @@ SQL;
 
         return $url;
     }
+
+    /**
+     * Get a list of users with the given e-mail address + their "active" field value (0 or 1)
+     *
+     * @param string $mail User id
+     *
+     * @return array List of users e-mails + active field
+     */
+    public static function getUsersByMail(string $mail): array
+    {
+        $resultData = Database::select(
+            'id, active',
+            Database::get_main_table(TABLE_MAIN_USER),
+            [
+                'where' => ['email = ?' => $mail],
+            ],
+            'all',
+            null,
+            true
+        );
+
+        if ($resultData === false) {
+            return [];
+        }
+
+        return $resultData;
+    }
+
+    /**
+     * Get whether we can send an e-mail or not.
+     * If the e-mail is not in the database, send the mail.
+     * If the e-mail is in the database but none of its occurences is active, don't send.
+     * @param string $mail The e-mail address to check
+     * @return bool Whether we can send an e-mail or not
+     */
+    public function isEmailingAllowed(string $mail): bool
+    {
+        $list = self::getUsersByMail($mail);
+        if (empty($list)) {
+            // No e-mail matches, send the mail
+            return true;
+        }
+        $send = false;
+        foreach ($list as $id => $user) {
+            if ($user['active'] == 1) {
+                // as soon as we find at least one active user, send the mail
+                return true;
+            }
+        }
+
+        return false;
+    }
 }