SendEmail

<?php
    
      use Lib\PHPMailer\Mailer;
      use Lib\StateManager;
      
      // Retrieve states
      $errorMessage = StateManager::getState('errorMessage', ['status' => false, 'message' => '']);
      $name = StateManager::getState('name');
      $email = StateManager::getState('email');
      $subject = StateManager::getState('subject');
      $message = StateManager::getState('message');
      
      /**
       * Validate input data
       *
       * @param array $data Input data to validate
       * @return array An array with validation status and message
       */
      function validateInput($data)
      {
          foreach ($data as $key => $value) {
              if (empty($value)) {
                  return ['status' => false, 'message' => "Please fill out the $key field."];
              }
          }
          return ['status' => true, 'message' => ''];
      }
      
      /**
       * Send an email
       *
       * @param array|object $data Input data for sending email
       * @return void
       */
      function sendEmail($data)
      {
          // Update state
          foreach ($data as $key => $value) {
              StateManager::setState($key, $value);
          }
      
          // Validate input
          $validation = validateInput($data);
          if (!$validation['status']) {
              StateManager::setState('errorMessage', $validation);
              return;
          }
      
          $name = $data->name;
          $email = $data->email;
          $subject = $data->subject;
          $message = $data->message;
          $options = ['name' => $name, 'addCC' => ['cc@example.com', 'cc2@example.com'], 'addBCC' => 'bcc@example.com']
          // 'name', 'addCC' and 'addBCC' are optional parameters for additional recipients (CC and BCC). They can be a single string email or an array of emails.
    
          $body = <<<EOT
              <h1>New message from $name</h1>
              <p>Email: $email</p>
              <p>Subject: $subject</p>
              <p>Message: $message</p>
          EOT;
    
          try {
              $mailer = new Mailer();
              if ($mailer->send($email, $subject, $body, $options)) {
                  StateManager::setState('errorMessage', ['status' => true, 'message' => 'Email sent successfully.']);
                  // Clear form data after successful email sending
                  foreach (['name', 'email', 'subject', 'message'] as $key) {
                      StateManager::setState($key, '');
                  }
              } else {
                  StateManager::setState('errorMessage', ['status' => false, 'message' => 'Failed to send email.']);
              }
          } catch (Exception $e) {
              // Log the exception message (not shown here)
              StateManager::setState('errorMessage', ['status' => false, 'message' => 'An error occurred while sending email.']);
          }
      }
      
      ?>
      
      <div class="w-screen h-screen grid place-items-center">
          <div class="max-w-md">
              <form class="space-y-4" onsubmit="sendEmail" pp-suspense="{'disabled': true}">
                  <h1 class="text-3xl font-bold">Send Email</h1>
                  <p class="text-gray-500">Fill out the form below and we'll get back to you as soon as possible.</p>
                  <p class="mt-2 <?= $errorMessage->status ? 'text-blue-500' : 'text-red-500' ?>" pp-hidden="10s"><?= $errorMessage->message ?></p>
                  <input class="border rounded-md p-2 w-full" name="name" placeholder="Name" type="text" value="<?= $name ?>" />
                  <input class="border rounded-md p-2 w-full" name="email" placeholder="Email" type="email" value="<?= $email ?>" />
                  <input class="border rounded-md p-2 w-full" name="subject" placeholder="Subject" type="text" value="<?= $subject ?>" />
                  <textarea class="border rounded-md p-2 w-full" name="message" placeholder="Your message" class="min-h-[100px]"><?= $message ?></textarea>
                  <button type="submit" class="bg-blue-500 rounded-md p-2 text-white disabled:bg-gray-500" pp-suspense="Loading...">Send Email</button>
              </form>
          </div>
      </div>