<?php

/**
 * @file
 * Enables Drupal to track and log the clicks on AdSense ads.
 *
 * This is a sub-module of the AdSense package, with the Drupal hooks
 * and other administrative functions.
 */

define('ADSENSE_CLICK_TRACKING_DEFAULT', TRUE);
define('ADSENSE_CLICK_TRACKING_NAME_RESOLVE_DEFAULT', 0);

/**
 * Implements hook_menu().
 */
function adsense_click_menu() {
  $items = array();

  $items['admin/config/services/adsense/click'] = array(
    'title'            => 'Clicks',
    'description'      => 'Track the clicks on Adsense ads.',
    'page callback'    => 'drupal_get_form',
    'page arguments'   => array('adsense_click_admin_settings'),
    'type'             => MENU_LOCAL_TASK,
    'access arguments' => array('administer site configuration'),
    'file'             => 'adsense_click.admin.inc',
    'weight'           => 9,
  );
  $items['admin/reports/adsense'] = array(
    'title'            => 'AdSense clicks',
    'description'      => 'Track AdSense clicks.',
    'page callback'    => 'adsense_click_log',
    'type'             => MENU_NORMAL_ITEM,
    'access arguments' => array('view clicks'),
    'file'             => 'adsense_click.logs.inc',
  );
  $items['admin/reports/adsense/top_pages'] = array(
    'title'            => 'Top pages',
    'page callback'    => 'adsense_click_top_pages',
    'type'             => MENU_NORMAL_ITEM,
    'access arguments' => array('view clicks'),
    'file'             => 'adsense_click.logs.inc',
  );
  $items['admin/reports/adsense/by_day'] = array(
    'title'            => 'By day',
    'page callback'    => 'adsense_click_by_day',
    'type'             => MENU_NORMAL_ITEM,
    'access arguments' => array('view clicks'),
    'file'             => 'adsense_click.logs.inc',
  );
  $items['adsense_click'] = array(
    'page callback'    => 'adsense_click_register',
    'type'             => MENU_CALLBACK,
    'access callback'  => TRUE,
  );

  return $items;
}

/**
 * Implements hook_permission().
 */
function adsense_click_permission() {
  return array(
    'view clicks' => array(
      'title' => 'View AdSense clicks',
    ),
  );
}

/**
 * Implements hook_init().
 */
function adsense_click_init() {
  if (variable_get('adsense_click_tracking', ADSENSE_CLICK_TRACKING_DEFAULT)) {
    drupal_add_js(drupal_get_path('module', 'adsense_click') . '/adsense_click.js');
  }
}

/**
 * Logs a click in the database.
 */
function adsense_click_register() {
  if (variable_get('adsense_click_tracking', ADSENSE_CLICK_TRACKING_DEFAULT)) {
    db_insert('adsense_clicks')
      ->fields(array(
        'ip' => ip_address(),
        'timestamp' => REQUEST_TIME,
        'path' => $_GET['u'],
        'title' => $_GET['t'],
        'referrer' => $_GET['r'],
      ))
      ->execute();
  }
}