jidaikobo-shibata/a11yc

<?php
/**
 * A11yc\Maintenance
 *
 * @package    part of A11yc
 * @author     Jidaikobo Inc.
 * @license    The MIT License (MIT)
 * @copyright  Jidaikobo Inc.
 * @link       http://www.jidaikobo.com
 */
namespace A11yc;

use A11yc\Model;

class Maintenance extends \Kontiki\Maintenance
{
    public static $is_first_of_day = null;
    public static $is_using_lower  = null;
    private static $latest_version = null;
    private static $github_api     = 'https://api.github.com/repos/jidaikobo-shibata/a11yc';

    /**
     * leave at least a day
     *
     * @return Bool
     */
    public static function isFisrtOfToday ()
    {
        if ( ! is_null(static::$is_first_of_day)) return static::$is_first_of_day;

        $today = date('Y-m-d');

        // check
        $last_checked = Model\Setting::fetch('last_checked');

        // check limit for github
        $count_arr = array('date' => $today, 'count' => 0);
        $checktimes = Model\Setting::fetch('checktimes', $count_arr);
        if ($checktimes['date'] == $today && $checktimes['count'] > 5) return false;
        if ($checktimes['date'] == $today)
        {
            $checktimes['count']++;
            Model\Setting::update('checktimes', $checktimes);
            return false;
        }

        Model\Setting::update('checktimes', $count_arr);
        static::$is_first_of_day = true;
        if (empty($last_checked))
        {
            Model\Setting::insert(array(
                    'last_checked' => $today
                ));
        }
        elseif ( ! empty($last_checked) && strtotime($last_checked) >= time() - 86400)
        {
            static::$is_first_of_day = false;
        }

        if ($last_checked != $today)
        {
            Model\Setting::update('last_checked', $today);
        }
        return static::$is_first_of_day;
    }

    /**
     * compare with stored version
     *
     * @return Bool
     */
    public static function isUgingLower ()
    {
        if ( ! self::isFisrtOfToday()) return false;
        if ( ! is_null(static::$is_using_lower)) return static::$is_using_lower;

        // lower: return true
        $latest = static::getLatestVersion();
        if ($latest !== false)
        {
            static::$is_using_lower = version_compare(A11YC_VERSION, $latest) == -1;
            return static::$is_using_lower;
        }

        // couldn't check version
        error_log('Notice: \A11yc\Maintenance::isUgingLower could not get version.');
        return true;
    }

    /**
     * get latest version
     *
     * @return Bool|String
     */
    public static function getLatestVersion ()
    {
        if ( ! self::isFisrtOfToday()) return false;
        if ( ! is_null(self::$latest_version)) return self::$latest_version;

        // ask Github API and update stored version
        ini_set('user_agent', 'file_get_contents');
        $strs = @file_get_contents(self::$github_api.'/tags');

        if ($strs)
        {
            $tags = json_decode($strs, true);
            $max = $tags[min(array_keys($tags))];
            self::$latest_version = $max['name'];
            return self::$latest_version;
        }

        self::$latest_version = false;
        return self::$latest_version;
    }

}