stats_update.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Called via ajax when updating blog stats.
 * cmid (id param) must be sent unless a personal blog page.
 *
 * @package    mod
 * @subpackage oublog
 * @copyright  2013 The open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

define('AJAX_SCRIPT', true);
header('Content-Type: application/json');
require_once(dirname(__FILE__) . '/../../config.php');
require_once($CFG->dirroot . '/mod/oublog/locallib.php');

require_sesskey();
$type = required_param('type', PARAM_ALPHA);
$id = optional_param('id', 0, PARAM_INT);
$currentcmid = optional_param('currentcmid', 0, PARAM_INT);

if ($id) {
    // Load efficiently (and with full $cm data) using get_fast_modinfo.
    $course = $DB->get_record_select('course',
            'id = (SELECT course FROM {course_modules} WHERE id = ?)', array($id),
            '*', MUST_EXIST);

    $modinfo = get_fast_modinfo($course);
    $cm = $modinfo->get_cm($id);
    if ($cm->modname !== 'oublog') {
        throw new moodle_exception('invalidcoursemodule');
    }

    if (!$oublog = $DB->get_record('oublog', array('id' => $cm->instance))) {
        throw new moodle_exception('invalidcoursemodule');
    }
} else {
    // Global personal blog.
    if (!$oublog = $DB->get_record('oublog', array('global' => 1))) {
        throw new moodle_exception('personalblognotsetup', 'oublog');
    }

    if (!$cm = get_coursemodule_from_instance('oublog', $oublog->id)) {
        throw new moodle_exception('invalidcoursemodule');
    }
    $masterblog = null;
    $cmmaster = null;
}
$childdata = oublog_get_blog_data_base_on_cmid_of_childblog($currentcmid, $oublog);

$currentoublog = $oublog;
$currentcontext = context_module::instance($cm->id);
$currentcm = $cm;
$childblog = null;
$childcm = null;
if (!empty($childdata)) {
    $currentoublog = $childdata['ousharedblog'];
    $currentcontext = $childdata['context'];
    $currentcm = $childdata['cm'];
    $childblog = $oublog;
    $childcm = $cm;
}

oublog_check_view_permissions($currentoublog, $currentcontext, $currentcm);

$func = "oublog_stats_output_$type";

if (function_exists($func)) {
    echo json_encode($func($currentoublog, $currentcm, null, true, $childblog, $childcm));
}