<?php
/*
Plugin Name: Incrwd Engagement Rewards System
Plugin URI: http://www.myincrwd.com/
Description: The Incrwd Engagement Rewards System adds an awesome rewards widget to your site that will measurably improve the metrics you care about the most.
Author: Incrwd <team@myincrwd.com>
Version: 3
Author URI: http://myincrwd.com/
*/

require_once(dirname(__FILE__) . '/build.php');
require_once(dirname(__FILE__) . '/lib/utils.php');
require_once(dirname(__FILE__) . '/incrwd-embed.php');
require_once(dirname(__FILE__) . '/lib/wp-api.php');

if (defined('INCRWD_LOCAL') && INCRWD_LOCAL) { // Incrwd defines this for local dev
  define('INCRWD_API_URL', 'http://incrwd.example.com/w/api/');
  define('INCRWD_JS_URL', '');
} else {
  define('INCRWD_API_URL', 'http://widget.myincrwd.com/w/api/');
  define('INCRWD_JS_URL', 'http://static.widget.myincrwd.com/incrwd.js');
}
define('INCRWD_VERSION', '3');

function incrwd_options() {
  return array('incrwd_site_id',
               'incrwd_secret_key');
}

function incrwd_output_footer() {
  incrwd_embed(get_option('incrwd_site_id'), 
               defined('INCRWD_LOCAL') && INCRWD_LOCAL, 
               INCRWD_JS_URL, incrwd_sso());
}
add_action('wp_footer', 'incrwd_output_footer');

function incrwd_manage() {
  // TODO: in future, check for needs update here.
  include_once(dirname(__FILE__) . '/manage.php');
}

function incrwd_add_pages() {
  add_submenu_page(
    'plugins.php',
    'Manage Incrwd',
    'Manage Incrwd',
    'activate_plugins',
    'incrwd',
    'incrwd_manage');
}

add_action('admin_menu', 'incrwd_add_pages', 10);

function incrwd_get_api() {
  return new IncrwdWordPressAPI(
    get_option('incrwd_site_id'),
    get_option('incrwd_secret_key'),
    INCRWD_API_URL);
}

function incrwd_new_comment($comment_id, $approval_status) {
  if ($approval_status == 1) {
    incrwd_get_api()->approved_comment_left($comment_id);
  }
}

function incrwd_comment_approved($comment) {
  $comment_id = $comment->comment_ID;
  incrwd_get_api()->approved_comment_left($comment_id);
}

add_action('comment_post', 'incrwd_new_comment', 10, 2);
add_action('comment_unapproved_to_approved', 'incrwd_comment_approved');

/**
 * Encodes an associative array using hmac/time method.
 *
 * @param $arr
 *   An associative array of arguments to be passed.
 */
function encode_arr($arr) {
  if (count($arr) == 0) {
    $json = "{}";
  }
  else {
    $json = cf_json_encode($arr);
  }
  $data = base64_encode($json);
  $key = get_option('incrwd_secret_key');
  $time = time();
  $hmac = incrwd_hmacsha1($data . ' ' . $time, $key);
  $payload = $data . ' ' . $hmac . ' '. $time;
  return $payload;
}

// Single sign-on integration
function incrwd_sso() {
  global $current_user;
  if ($current_user->ID) {
    $avatar_tag = get_avatar($current_user->ID);
    $avatar_data = array();
    preg_match('/(src)=((\'|")[^(\'|")]*(\'|"))/i', $avatar_tag, $avatar_data);
    $avatar = str_replace(array('"', "'"), '', $avatar_data[2]);
    $user_data = array(
      'username' => $current_user->display_name,
      'id' => intval($current_user->ID),
      'avatar' => $avatar,
      'email' => $current_user->user_email,);
  }
  else {
    $user_data = array();
  }
  return encode_arr($user_data);
}