<?php

/**
 * Implementation of hook_mail_alter().
 */
function contact_google_analytics_mail_alter(&$message) {
  // TODO Let users decide which mail keys they want to attach our information.
  $supported_email_keys = array('contact_page_mail', 'webform_submission');
  // Create an array of allowed emails.
  $allowed_emails = explode(',',variable_get('contact_google_analytics_allowed_recipients', 'all'));
  // Loop through each allowed email and compare it to the "to" in the message.
  foreach ($allowed_emails as $allowed_email) {
    if (trim($allowed_email) == $message['to'] || $allowed_email == 'all') {
      // If there is a match, continue processing the email footer.  trim added to remove spaces.
      // Use strpos to catch the dynamic mail names rules generate.
      if (strpos($message['id'], 'rules_action_mail') || in_array($message['id'], $supported_email_keys)) {
        $body_footer = theme('contact_google_analytics_footer');
        $body_footer = token_replace($body_footer);
        $message['body'][] = $body_footer;
      }
    }
  }
}

/**
 * Implementation of hook_theme().
 */
function contact_google_analytics_theme() {
  return array(
    'contact_google_analytics_footer' => array(
      'variables' => array(),
    ),
  );
}

/**
 * Theme the email footer.
 */
function theme_contact_google_analytics_footer($footer) {
  $footer = "\n\n";
  $footer .= "================================================\n";
  $footer .= t('Google Analytics Information')."\n";
  $footer .= "================================================\n";
  $footer .= t('Source:')." [ga_tokenizer:ga-source]\n";
  $footer .= t('Campaign:')." [ga_tokenizer:ga-campaign]\n";
  $footer .= t('Medium:')." [ga_tokenizer:ga-medium]\n";
  $footer .= t('Content:')." [ga_tokenizer:ga-content]\n";
  $footer .= t('Term:')." [ga_tokenizer:ga-term]\n";
  $footer .= "\n";
  $footer .= t('First Visit:')." [ga_tokenizer:ga-first-visit]\n";
  $footer .= t('Previous Visit:')." [ga_tokenizer:ga-previous-visit]\n";
  $footer .= t('Current Visit:')." [ga_tokenizer:ga-current-visit]\n";
  $footer .= t('Times Visited:')." [ga_tokenizer:ga-times-visited]\n";
  $footer .= "\n";
  $footer .= t('Current IP:')." ".$_SERVER['REMOTE_ADDR']."\n";
  $footer .= "================================================\n\n";

  return $footer;
}
/**
 * Implements hook_menu().
 */
function contact_google_analytics_menu() {
  $items = array();
   $items['admin/config/system/contact-google-analytics'] = array(
     'title' => 'Contact google analytics',
     'page callback' => 'drupal_get_form',
     'page arguments' => array('contact_google_analytics_admin'),
     'access arguments' => array('administer contact google analytics'),
     'description' => 'Configure the contact google analytics module settings.'
   );
   return $items;
}

/**
 * Menu callback for 'admin/config/contact-google-analytics'.
 */
function contact_google_analytics_admin() {
  $form = array();

  $form['contact_google_analytics_allowed_recipients'] = array(
    '#type' => 'textfield',
    '#title' => t('Allowed Recipients'),
    '#description' => t('The email addresses that are allowed to see the Contact Google Analytics footer.  Comma separated.  For all recipients to receive the footer, type: all.  For no recipients to receive the footer, leave blank.'),
    '#default_value' => variable_get('contact_google_analytics_allowed_recipients', 'all'),
    );
  return system_settings_form($form);
}

/**
 * Form submit callback for contact_google_analytics_admin form.
 */
function contact_google_analytics_admin_submit($form, &$form_state) {
    $form_values = $form_state['values'];
    variable_set('contact_google_analytics_allowed_recipients', $form_values['allowed_recipients']);
}