xyzshop/helper/car_helper.php

<?php
/**
 * Created by PhpStorm.
 * User: lionared
 * Date: 2018/3/5
 * Time: 下午8:23
 */
require_once(BASE_ROOT_PATH . '/helper/car/tpl_display.php');

class car_helper
{
    private $mCarsVersion;

    static private $stInstance = null;

    private function __construct()
    {
        $this->mCarsVersion = [];
        $this->init();
    }

    private function init()
    {
        $i = 0;
        while (true)
        {
            $start = $i * 1000;
            $items = Model()->table('car_base')->field('update_version,car_id')->order('car_id asc')->limit("{$start},1000")->select();
            if(empty($items)) {
                return;
            }
            $i++;

            foreach ($items as $item)
            {
                $version = intval($item['update_version']);
                $car_id = intval($item['car_id']);
                if($version <= 0) {
                    $version = 1;
                }
                $this->mCarsVersion[$car_id] = $version;
            }
        }
    }

    static public function instance()
    {
        if (self::$stInstance == null) {
            self::$stInstance = new car_helper();
        }
        return self::$stInstance;
    }

    public function index_url($car_id)
    {
        $car_id = intval($car_id);
        if($car_id <= 0) return '';

        $file_name = "{$car_id}_index.html";
        $file_path = BASE_UPLOAD_PATH. DS. "car". DS. $file_name;
        if(!file_exists($file_path))
        {
            if($this->write_file($file_path, $this->index_file_content($car_id)) == false){
                return '';
            }
        }

        $version = $this->mCarsVersion[$car_id];
        $url = UPLOAD_SITE_URL. DS. "car". DS. "{$file_name}?{$version}";

        return $url;
    }

    public function detail_url($car_id)
    {
        $car_id = intval($car_id);
        if($car_id <= 0) return '';

        $file_name = "{$car_id}_detail.html";
        $file_path = BASE_UPLOAD_PATH. DS. "car". DS. $file_name;
        if(!file_exists($file_path))
        {
            if($this->write_file($file_path, $this->detail_file_content($car_id)) == false) {
                return '';
            }
        }

        $version = $this->mCarsVersion[$car_id];
        $url = UPLOAD_SITE_URL. DS. "car". DS. "{$file_name}?{$version}";

        return $url;
    }

    private function write_file($file_path, $content)
    {
        $write_success = false;

        $file = fopen($file_path,'w');
        if($file) {
            $write_success = fwrite($file, $content);
            fclose($file);
        }
        return $write_success;
    }

    private function index_file_content($car_id)
    {
        $mod_car = Model('car');
        $car_info = $mod_car->base_info([ 'car_id'=>$car_id ]);
        ob_start();
        Tpl::output('car_info', $car_info);
        Tpl::output('detail_url', $this->detail_url($car_id));
        Tpl::showpage("car/car_details");
        $content = ob_get_contents();
        ob_clean();
        return $content;
    }

    private function detail_file_content($car_id)
    {
        ob_start();
        Tpl::output('tpl', new tpl_display($car_id));
        Tpl::showpage("car/car_info");
        $content = ob_get_contents();
        ob_clean();
        return $content;
    }
}