<?php
/**
* @file
* Drupal Module: Google Analytics
*
* Adds the required Javascript to all your Drupal pages to allow tracking by
* the Google Analytics statistics package.
*
* @author: Alexander Hass <https://drupal.org/user/85918>
*/
/**
* Define the default file extension list that should be tracked as download.
*/
define('GOOGLEANALYTICS_TRACKFILES_EXTENSIONS', '7z|aac|arc|arj|asf|asx|avi|bin|csv|doc(x|m)?|dot(x|m)?|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls(x|m|b)?|xlt(x|m)|xlam|xml|z|zip');
/**
* Define default path exclusion list to remove tracking from admin pages,
* see https://drupal.org/node/34970 for more information.
*/
define('GOOGLEANALYTICS_PAGES', "admin\nadmin/*\nbatch\nnode/add*\nnode/*/*\nuser/*/*");
/**
* Advertise the supported google analytics api details.
*/
function googleanalytics_api() {
return array(
'api' => 'analytics.js',
);
}
/**
* Implements hook_help().
*/
function googleanalytics_help($path, $arg) {
switch ($path) {
case 'admin/config/system/googleanalytics':
return t('<a href="@ga_url">Google Analytics</a> is a free (registration required) website traffic and marketing effectiveness service.', array('@ga_url' => 'https://marketingplatform.google.com/about/analytics/'));
}
}
/**
* Implements hook_theme().
*/
function googleanalytics_theme() {
return array(
'googleanalytics_admin_custom_var_table' => array(
'render element' => 'form',
),
);
}
/**
* Implements hook_permission().
*/
function googleanalytics_permission() {
return array(
'administer google analytics' => array(
'title' => t('Administer Google Analytics'),
'description' => t('Perform maintenance tasks for Google Analytics.'),
),
'opt-in or out of tracking' => array(
'title' => t('Opt-in or out of tracking'),
'description' => t('Allow users to decide if tracking code will be added to pages or not.'),
),
'use PHP for tracking visibility' => array(
'title' => t('Use PHP for tracking visibility'),
'description' => t('Enter PHP code in the field for tracking visibility settings.'),
'restrict access' => TRUE,
),
'add JS snippets for google analytics' => array(
'title' => t('Add JavaScript snippets'),
'description' => 'Enter JavaScript code snippets for advanced Google Analytics functionality.',
'restrict access' => TRUE,
),
);
}
/**
* Implements hook_menu().
*/
function googleanalytics_menu() {
$items['admin/config/system/googleanalytics'] = array(
'title' => 'Google Analytics',
'description' => 'Configure tracking behavior to get insights into your website traffic and marketing effectiveness.',
'page callback' => 'drupal_get_form',
'page arguments' => array('googleanalytics_admin_settings_form'),
'access arguments' => array('administer google analytics'),
'type' => MENU_NORMAL_ITEM,
'file' => 'googleanalytics.admin.inc',
);
return $items;
}
/**
* Implements hook_page_alter() to insert JavaScript to the appropriate scope/region of the page.
*/
function googleanalytics_page_alter(&$page) {
global $base_path, $user;
$id = variable_get('googleanalytics_account', '');
// Get page status code for visibility filtering.
$status = drupal_get_http_header('Status');
$trackable_status_codes = array(
'403 Forbidden',
'404 Not Found',
);
// 1. Check if the GA account number has a valid value.
// 2. Track page views based on visibility value.
// 3. Check if we should track the currently active user's role.
// 4. Ignore pages visibility filter for 404 or 403 status codes.
if (preg_match('/^UA-\d+-\d+$/', $id) && (_googleanalytics_visibility_pages() || in_array($status, $trackable_status_codes)) && _googleanalytics_visibility_user($user)) {
$debug = variable_get('googleanalytics_debug', 0);
$url_custom = '';
// Add link tracking.
$link_settings = array();
if ($track_outbound = variable_get('googleanalytics_trackoutbound', 1)) {
$link_settings['trackOutbound'] = $track_outbound;
}
if ($track_mailto = variable_get('googleanalytics_trackmailto', 1)) {
$link_settings['trackMailto'] = $track_mailto;
}
if (($track_download = variable_get('googleanalytics_trackfiles', 1)) && ($trackfiles_extensions = variable_get('googleanalytics_trackfiles_extensions', GOOGLEANALYTICS_TRACKFILES_EXTENSIONS))) {
$link_settings['trackDownload'] = $track_download;
$link_settings['trackDownloadExtensions'] = $trackfiles_extensions;
}
if (module_exists('colorbox') && ($track_colorbox = variable_get('googleanalytics_trackcolorbox', 1))) {
$link_settings['trackColorbox'] = $track_colorbox;
}
if ($track_domain_mode = variable_get('googleanalytics_domain_mode', 0)) {
$link_settings['trackDomainMode'] = (int) $track_domain_mode;
}
if ($track_cross_domains = variable_get('googleanalytics_cross_domains', '')) {
$link_settings['trackCrossDomains'] = preg_split('/(\r\n?|\n)/', $track_cross_domains);
}
if ($track_url_fragments = variable_get('googleanalytics_trackurlfragments', 0)) {
$link_settings['trackUrlFragments'] = $track_url_fragments;
$url_custom = 'location.pathname + location.search + location.hash';
}
if (!empty($link_settings)) {
drupal_add_js(array('googleanalytics' => $link_settings), 'setting');
// Add debugging code.
if ($debug) {
drupal_add_js(drupal_get_path('module', 'googleanalytics') . '/googleanalytics.debug.js');
// Add the JS test in development to the page.
//drupal_add_js(drupal_get_path('module', 'googleanalytics') . '/googleanalytics.test.js');
}
else {
drupal_add_js(drupal_get_path('module', 'googleanalytics') . '/googleanalytics.js');
}
}
// Add messages tracking.
$message_events = '';
if ($message_types = variable_get('googleanalytics_trackmessages', array())) {
$message_types = array_values(array_filter($message_types));
$status_heading = array(
'status' => t('Status message'),
'warning' => t('Warning message'),
'error' => t('Error message'),
);
foreach (drupal_get_messages(NULL, FALSE) as $type => $messages) {
// Track only the selected message types.
if (in_array($type, $message_types)) {
foreach ($messages as $message) {
// @todo: Track as exceptions?
$message_events .= 'ga("send", "event", ' . drupal_json_encode(t('Messages')) . ', ' . drupal_json_encode($status_heading[$type]) . ', ' . drupal_json_encode(strip_tags($message)) . ');';
}
}
}
}
// Site search tracking support.
// UPEI changes use arg(1) and arg(2) instead of arg(0) and arg(1) and get rid of no-results
if (module_exists('search') && variable_get('googleanalytics_site_search', FALSE) && arg(1) == 'search' && $keys = arg(2)) {
// hook_preprocess_search_results() is not executed if search result is
// empty. Make sure the counter is set to 0 if there are no results.
$url_custom = drupal_json_encode(url('search/' . arg(2), array('query' => array('search' => $keys))));
}
// END UPEI changes
// If this node is a translation of another node, pass the original
// node instead.
if (module_exists('translation') && variable_get('googleanalytics_translation_set', 0)) {
// Check we have a node object, it supports translation, and its
// translated node ID (tnid) doesn't match its own node ID.
$node = menu_get_object();
if ($node && translation_supported_type($node->type) && !empty($node->tnid) && ($node->tnid != $node->nid)) {
$source_node = node_load($node->tnid);
$languages = language_list();
$url_custom = drupal_json_encode(url('node/' . $source_node->nid, array('language' => $languages[$source_node->language])));
}
}
// Track access denied (403) and file not found (404) pages.
if ($status == '403 Forbidden') {
// See https://www.google.com/support/analytics/bin/answer.py?answer=86927
$url_custom = '"' . $base_path . '403.html?page=" + document.location.pathname + document.location.search + "&from=" + document.referrer';
}
elseif ($status == '404 Not Found') {
$url_custom = '"' . $base_path . '404.html?page=" + document.location.pathname + document.location.search + "&from=" + document.referrer';
}
// #2693595: User has entered an invalid login and clicked on forgot
// password link. This link contains the username or email address and may
// get send to Google if we do not override it. Override only if 'name'
// query param exists. Last custom url condition, this need to win.
//
// URLs to protect are:
// - user/password?name=username
// - user/password?name=foo@example.com
if (arg(0) == 'user' && arg(1) == 'password' && array_key_exists('name', drupal_get_query_parameters())) {
$url_custom = '"' . $base_path . 'user/password"';
}
// Add custom dimensions and metrics.
$custom_var = '';
foreach (array('dimension', 'metric') as $googleanalytics_custom_type) {
$googleanalytics_custom_vars = variable_get('googleanalytics_custom_' . $googleanalytics_custom_type, array());
// Are there dimensions or metrics configured?
if (!empty($googleanalytics_custom_vars)) {
// Add all the configured variables to the content.
foreach ($googleanalytics_custom_vars as $googleanalytics_custom_var) {
// Replace tokens in values.
$types = array();
$node = menu_get_object();
if (is_object($node)) {
$types += array('node' => $node);
}
$googleanalytics_custom_var['value'] = token_replace($googleanalytics_custom_var['value'], $types, array('clear' => TRUE));
// Suppress empty values.
if (!drupal_strlen(trim($googleanalytics_custom_var['value']))) {
continue;
}
// Per documentation the max length of a dimension is 150 bytes.
// A metric has no length limitation. It's not documented if this
// limit means 150 bytes after url encoding or before.
// See https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#customs
if ($googleanalytics_custom_type == 'dimension' && drupal_strlen($googleanalytics_custom_var['value']) > 150) {
$googleanalytics_custom_var['value'] = substr($googleanalytics_custom_var['value'], 0, 150);
}
// Cast metric values for json_encode to data type numeric.
if ($googleanalytics_custom_type == 'metric') {
settype($googleanalytics_custom_var['value'], 'float');
};
// Add variables to tracker.
$custom_var .= 'ga("set", ' . drupal_json_encode($googleanalytics_custom_type . $googleanalytics_custom_var['index']) . ', ' . drupal_json_encode($googleanalytics_custom_var['value']) . ');';
}
}
}
// Build tracker code.
$script = '(function(i,s,o,g,r,a,m){';
$script .= 'i["GoogleAnalyticsObject"]=r;i[r]=i[r]||function(){';
$script .= '(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),';
$script .= 'm=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)';
$script .= '})(window,document,"script",';
// Which version of the tracking library should be used?
$library_tracker_url = 'https://www.google-analytics.com/' . ($debug ? 'analytics_debug.js' : 'analytics.js');
// Should a local cached copy of analytics.js be used?
if (variable_get('googleanalytics_cache', 0) && $url = _googleanalytics_cache($library_tracker_url)) {
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed.
$query_string = '?' . variable_get('css_js_query_string', '0');
$script .= '"' . $url . $query_string . '"';
}
else {
$script .= '"' . $library_tracker_url . '"';
}
$script .= ',"ga");';
// Add any custom code snippets if specified.
$codesnippet_create = variable_get('googleanalytics_codesnippet_create', array());
$codesnippet_before = variable_get('googleanalytics_codesnippet_before', '');
$codesnippet_after = variable_get('googleanalytics_codesnippet_after', '');
// Build the create only fields list.
$create_only_fields = array('cookieDomain' => 'auto');
$create_only_fields = array_merge($create_only_fields, $codesnippet_create);
// Domain tracking type.
global $cookie_domain;
$domain_mode = variable_get('googleanalytics_domain_mode', 0);
$googleanalytics_adsense_script = '';
// Per RFC 2109, cookie domains must contain at least one dot other than the
// first. For hosts such as 'localhost' or IP Addresses we don't set a cookie domain.
if ($domain_mode == 1 && count(explode('.', $cookie_domain)) > 2 && !is_numeric(str_replace('.', '', $cookie_domain))) {
$create_only_fields = array_merge($create_only_fields, array('cookieDomain' => $cookie_domain));
$googleanalytics_adsense_script .= 'window.google_analytics_domain_name = ' . drupal_json_encode($cookie_domain) . ';';
}
elseif ($domain_mode == 2) {
// Cross Domain tracking. 'autoLinker' need to be enabled in 'create'.
$create_only_fields = array_merge($create_only_fields, array('allowLinker' => TRUE));
$googleanalytics_adsense_script .= 'window.google_analytics_domain_name = "none";';
}
// Track logged in users across all devices.
if (variable_get('googleanalytics_trackuserid', 0) && user_is_logged_in()) {
$create_only_fields['userId'] = google_analytics_user_id_hash($user->uid);
}
// Create a tracker.
$script .= 'ga("create", ' . drupal_json_encode($id) . ', ' . drupal_json_encode($create_only_fields) .');';
// Prepare Adsense tracking.
$googleanalytics_adsense_script .= 'window.google_analytics_uacct = ' . drupal_json_encode($id) . ';';
// Add enhanced link attribution after 'create', but before 'pageview' send.
// @see https://support.google.com/analytics/answer/2558867
if (variable_get('googleanalytics_tracklinkid', 0)) {
$script .= 'ga("require", "linkid", "linkid.js");';
}
// Add display features after 'create', but before 'pageview' send.
// @see https://support.google.com/analytics/answer/2444872
if (variable_get('googleanalytics_trackdoubleclick', 0)) {
$script .= 'ga("require", "displayfeatures");';
}
// Domain tracking type.
if ($domain_mode == 2) {
// Cross Domain tracking
// https://developers.google.com/analytics/devguides/collection/upgrade/reference/gajs-analyticsjs#cross-domain
$script .= 'ga("require", "linker");';
$script .= 'ga("linker:autoLink", ' . drupal_json_encode($link_settings['trackCrossDomains']) . ');';
}
if (variable_get('googleanalytics_tracker_anonymizeip', 1)) {
$script .= 'ga("set", "anonymizeIp", true);';
}
if (!empty($custom_var)) {
$script .= $custom_var;
}
if (!empty($codesnippet_before)) {
$script .= $codesnippet_before;
}
if (!empty($url_custom)) {
$script .= 'ga("set", "page", ' . $url_custom . ');';
}
$script .= 'ga("send", "pageview");';
if (!empty($message_events)) {
$script .= $message_events;
}
if (!empty($codesnippet_after)) {
$script .= $codesnippet_after;
}
if (variable_get('googleanalytics_trackadsense', FALSE)) {
// Custom tracking. Prepend before all other JavaScript.
// @TODO: https://support.google.com/adsense/answer/98142
// sounds like it could be appended to $script.
drupal_add_js($googleanalytics_adsense_script, array('type' => 'inline', 'group' => JS_LIBRARY-1, 'requires_jquery' => FALSE));
}
drupal_add_js($script, array('scope' => 'header', 'type' => 'inline', 'requires_jquery' => FALSE));
}
}
/**
* Generate user id hash to implement USER_ID.
*
* The USER_ID value should be a unique, persistent, and non-personally
* identifiable string identifier that represents a user or signed-in
* account across devices.
*
* @param int $uid
* User id.
*
* @return string
* User id hash.
*/
function google_analytics_user_id_hash($uid) {
return drupal_hmac_base64($uid, drupal_get_private_key() . drupal_get_hash_salt());
}
/**
* Implements hook_field_extra_fields().
*/
function googleanalytics_field_extra_fields() {
$extra['user']['user']['form']['googleanalytics'] = array(
'label' => t('Google Analytics configuration'),
'description' => t('Google Analytics module form element.'),
'weight' => 3,
);
return $extra;
}
/**
* Implements hook_form_FORM_ID_alter().
*
* Allow users to decide if tracking code will be added to pages or not.
*/
function googleanalytics_form_user_profile_form_alter(&$form, &$form_state) {
$account = $form['#user'];
$category = $form['#user_category'];
if ($category == 'account' && user_access('opt-in or out of tracking') && ($custom = variable_get('googleanalytics_custom', 0)) != 0 && _googleanalytics_visibility_roles($account)) {
$form['googleanalytics'] = array(
'#type' => 'fieldset',
'#title' => t('Google Analytics configuration'),
'#weight' => 3,
'#collapsible' => TRUE,
'#tree' => TRUE
);
switch ($custom) {
case 1:
$description = t('Users are tracked by default, but you are able to opt out.');
break;
case 2:
$description = t('Users are <em>not</em> tracked by default, but you are able to opt in.');
break;
}
// Disable tracking for visitors who have opted out from tracking via DNT (Do-Not-Track) header.
$disabled = FALSE;
if (variable_get('googleanalytics_privacy_donottrack', 1) && !empty($_SERVER['HTTP_DNT'])) {
$disabled = TRUE;
// Override settings value.
$account->data['googleanalytics']['custom'] = FALSE;
$description .= '<span class="admin-disabled">';
$description .= ' ' . t('You have opted out from tracking via browser privacy settings.');
$description .= '</span>';
}
$form['googleanalytics']['custom'] = array(
'#type' => 'checkbox',
'#title' => t('Enable user tracking'),
'#description' => $description,
'#default_value' => isset($account->data['googleanalytics']['custom']) ? $account->data['googleanalytics']['custom'] : ($custom == 1),
'#disabled' => $disabled,
);
return $form;
}
}
/**
* Implements hook_user_presave().
*/
function googleanalytics_user_presave(&$edit, $account, $category) {
if (isset($edit['googleanalytics']['custom'])) {
$edit['data']['googleanalytics']['custom'] = $edit['googleanalytics']['custom'];
}
}
/**
* Implements hook_cron().
*/
function googleanalytics_cron() {
// Regenerate the tracking code file every day.
if (REQUEST_TIME - variable_get('googleanalytics_last_cache', 0) >= 86400 && variable_get('googleanalytics_cache', 0)) {
_googleanalytics_cache('https://www.google-analytics.com/analytics.js', TRUE);
variable_set('googleanalytics_last_cache', REQUEST_TIME);
}
}
/**
* Implements hook_preprocess_search_results().
*
* Collects and adds the number of search results to the head.
*/
function googleanalytics_preprocess_search_results(&$variables) {
if (variable_get('googleanalytics_site_search', FALSE)) {
// There is no search result $variable available that hold the number of items
// found. But the pager item mumber can tell the number of search results.
global $pager_total_items;
drupal_add_js('window.googleanalytics_search_results = ' . intval($pager_total_items[0]) . ';', array('type' => 'inline', 'group' => JS_LIBRARY-1, 'requires_jquery' => FALSE));
}
}
/**
* Helper function for grabbing search keys. Function is missing in D7.
*
* https://api.drupal.org/api/function/search_get_keys/6
*/
function googleanalytics_search_get_keys() {
static $return;
if (!isset($return)) {
// Extract keys as remainder of path
// Note: support old GET format of searches for existing links.
$path = explode('/', $_GET['q'], 3);
$keys = empty($_REQUEST['keys']) ? '' : $_REQUEST['keys'];
$return = count($path) == 3 ? $path[2] : $keys;
}
return $return;
}
/**
* Download/Synchronize/Cache tracking code file locally.
*
* @param $location
* The full URL to the external javascript file.
* @param $synchronize
* Synchronize to local cache if remote file has changed.
* @return mixed
* The path to the local javascript file on success, boolean FALSE on failure.
*/
function _googleanalytics_cache($location, $synchronize = FALSE) {
$path = 'public://googleanalytics';
$file_destination = $path . '/' . basename($location);
if (!file_exists($file_destination) || $synchronize) {
// Download the latest tracking code.
$result = drupal_http_request($location);
if ($result->code == 200) {
if (file_exists($file_destination)) {
// Synchronize tracking code and and replace local file if outdated.
$data_hash_local = drupal_hash_base64(file_get_contents($file_destination));
$data_hash_remote = drupal_hash_base64($result->data);
// Check that the files directory is writable.
if ($data_hash_local != $data_hash_remote && file_prepare_directory($path)) {
// Save updated tracking code file to disk.
file_unmanaged_save_data($result->data, $file_destination, FILE_EXISTS_REPLACE);
// Based on Drupal Core drupal_build_css_cache().
if (variable_get('css_gzip_compression', TRUE) && variable_get('clean_url', 0) && extension_loaded('zlib')) {
file_unmanaged_save_data(gzencode($result->data, 9, FORCE_GZIP), $file_destination . '.gz', FILE_EXISTS_REPLACE);
}
watchdog('googleanalytics', 'Locally cached tracking code file has been updated.', array(), WATCHDOG_INFO);
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
}
}
else {
// Check that the files directory is writable.
if (file_prepare_directory($path, FILE_CREATE_DIRECTORY)) {
// There is no need to flush JS here as core refreshes JS caches
// automatically, if new files are added.
file_unmanaged_save_data($result->data, $file_destination, FILE_EXISTS_REPLACE);
// Based on Drupal Core drupal_build_css_cache().
if (variable_get('css_gzip_compression', TRUE) && variable_get('clean_url', 0) && extension_loaded('zlib')) {
file_unmanaged_save_data(gzencode($result->data, 9, FORCE_GZIP), $file_destination . '.gz', FILE_EXISTS_REPLACE);
}
watchdog('googleanalytics', 'Locally cached tracking code file has been saved.', array(), WATCHDOG_INFO);
// Return the local JS file path.
return file_create_url($file_destination);
}
}
}
}
else {
// Return the local JS file path.
return file_create_url($file_destination);
}
}
/**
* Delete cached files and directory.
*/
function googleanalytics_clear_js_cache() {
$path = 'public://googleanalytics';
if (file_prepare_directory($path)) {
file_scan_directory($path, '/.*/', array('callback' => 'file_unmanaged_delete'));
drupal_rmdir($path);
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
watchdog('googleanalytics', 'Local cache has been purged.', array(), WATCHDOG_INFO);
}
}
/**
* Tracking visibility check for an user object.
*
* @param $account
* A user object containing an array of roles to check.
* @return boolean
* A decision on if the current user is being tracked by Google Analytics.
*/
function _googleanalytics_visibility_user($account) {
$enabled = FALSE;
// Is current user a member of a role that should be tracked?
if (_googleanalytics_visibility_header($account) && _googleanalytics_visibility_roles($account)) {
// Use the user's block visibility setting, if necessary.
if (($custom = variable_get('googleanalytics_custom', 0)) != 0) {
if ($account->uid && isset($account->data['googleanalytics']['custom'])) {
$enabled = $account->data['googleanalytics']['custom'];
}
else {
$enabled = ($custom == 1);
}
}
else {
$enabled = TRUE;
}
}
return $enabled;
}
/**
* Based on visibility setting this function returns TRUE if GA code should
* be added for the current role and otherwise FALSE.
*/
function _googleanalytics_visibility_roles($account) {
$visibility = variable_get('googleanalytics_visibility_roles', 0);
$enabled = $visibility;
$roles = variable_get('googleanalytics_roles', array());
if (array_sum($roles) > 0) {
// One or more roles are selected.
foreach (array_keys($account->roles) as $rid) {
// Is the current user a member of one of these roles?
if (isset($roles[$rid]) && $rid == $roles[$rid]) {
// Current user is a member of a role that should be tracked/excluded from tracking.
$enabled = !$visibility;
break;
}
}
}
else {
// No role is selected for tracking, therefore all roles should be tracked.
$enabled = TRUE;
}
return $enabled;
}
/**
* Based on visibility setting this function returns TRUE if GA code should
* be added to the current page and otherwise FALSE.
*/
function _googleanalytics_visibility_pages() {
static $page_match;
// Cache visibility result if function is called more than once.
if (!isset($page_match)) {
$visibility = variable_get('googleanalytics_visibility_pages', 0);
$setting_pages = variable_get('googleanalytics_pages', GOOGLEANALYTICS_PAGES);
// Match path if necessary.
if (!empty($setting_pages)) {
// Convert path to lowercase. This allows comparison of the same path
// with different case. Ex: /Page, /page, /PAGE.
$pages = drupal_strtolower($setting_pages);
if ($visibility < 2) {
// Convert the Drupal path to lowercase
$path = drupal_strtolower(drupal_get_path_alias($_GET['q']));
// Compare the lowercase internal and lowercase path alias (if any).
$page_match = drupal_match_path($path, $pages);
if ($path != $_GET['q']) {
$page_match = $page_match || drupal_match_path($_GET['q'], $pages);
}
// When $visibility has a value of 0, the tracking code is displayed on
// all pages except those listed in $pages. When set to 1, it
// is displayed only on those pages listed in $pages.
$page_match = !($visibility xor $page_match);
}
elseif (module_exists('php')) {
$page_match = php_eval($setting_pages);
}
else {
$page_match = FALSE;
}
}
else {
$page_match = TRUE;
}
}
return $page_match;
}
/**
* Based on headers send by clients this function returns TRUE if GA code should
* be added to the current page and otherwise FALSE.
*/
function _googleanalytics_visibility_header($account) {
if (($account->uid || variable_get('cache', 0) == 0) && variable_get('googleanalytics_privacy_donottrack', 1) && !empty($_SERVER['HTTP_DNT'])) {
// Disable tracking if caching is disabled or a visitors is logged in and
// have opted out from tracking via DNT (Do-Not-Track) header.
return FALSE;
}
return TRUE;
}
