<?php
/**
 * User: Wisp X
 * Date: 2018/9/26
 * Time: 21:51
 * Link: https://github.com/wisp-x
 */

namespace app\index\controller;

use app\common\model\Images;
use think\Db;
use think\Exception;
use think\facade\Config;

class Api extends Base
{
    public function upload()
    {
        if ($this->request->isPost()) {
            Db::startTrans();
            try {
                if (!$this->config['allowed_tourist_upload'] && !$this->user) {
                    throw new Exception('管理员关闭了游客上传，请先登录账号', 401);
                }

                $image = $this->getImage();
                $size = $image->getSize();
                $mime = $image->getMime();
                $sha1 = $image->hash('sha1');
                $md5 = $image->hash('md5');

                if ($this->user) {
                    if (($this->user->use_quota + $size) > $this->user->quota) {
                        throw new Exception('保存失败！您的储存容量不足，请联系管理员！', 0);
                    }
                }

                // 当前储存策略
                $currentStrategy = strtolower($this->config['storage_strategy']);
                // 获取当前储存策略配置
                $strategyConfig = $this->currentStrategyConfig;
                // 获取当前驱动实例
                $strategy = $this->getStrategyInstance();

                $pathname = strtolower($this->makePathname($image->getInfo('name')));
                if (!$strategy->create($pathname, $image->getPathname())) {
                    if (Config::get('app.app_debug')) {
                        throw new Exception($strategy->getError(), 500);
                    }
                    throw new Exception('上传失败', 500);
                }

                $cdnDomain = $currentStrategy . '_cdn_domain';
                $domain = $this->request->domain();
                if (array_key_exists($cdnDomain, $strategyConfig)) {
                    if ($strategyConfig[$cdnDomain]) {
                        $domain = $strategyConfig[$cdnDomain];
                    }
                }

                if (!Images::create([
                    'user_id' => $this->user ? $this->user->id : 0,
                    'strategy' => $currentStrategy,
                    'path' => dirname($pathname),
                    'name' => basename($pathname),
                    'pathname' => $pathname,
                    'size' => $size,
                    'mime' => $mime,
                    'sha1' => $sha1,
                    'md5' => $md5
                ])) {
                    $strategy->delete($pathname);
                    throw new Exception('图片数据保存失败', 500);
                }

                $data = [
                    'name' => $image->getInfo('name'),
                    'url' => make_url($domain, $pathname),
                ];
                if ($this->user) {
                    $data['quota'] = sprintf('%.2f', (float)$this->user->quota);
                    $data['use_quota'] = sprintf('%.2f', (float)$this->user->use_quota);
                }

                Db::commit();
            } catch (Exception $e) {
                Db::rollback();
                return $this->result(null, $e->getCode(), $e->getMessage());
            }

            return $this->result($data, 200, '上传成功');
        }
    }

    /**
     * 获取图片资源
     *
     * @return array|null|\think\File
     * @throws Exception
     */
    private function getImage()
    {
        $image = $this->request->file('image');
        if (null === $image) {
            throw new Exception('图片资源获取失败！');
        }
        if (!is_uploaded_file($image->getPathname())) {
            throw new Exception('file is not uploaded via HTTP POST');
        }
        if (!$image->check([
            'size' => $this->config['upload_max_size'],
            'ext' => filter_comma($this->config['upload_allowed_exts']),
        ])) {
            throw new Exception($image->getError());
        }
        return $image;
    }

    /**
     * Make pathname
     *
     * @param $name 文件名
     *
     * @return string
     */
    private function makePathname($name)
    {
        $naming = Config::pull('naming');

        $path = trim(str_replace(
            array_column($naming['path'], 'name'),
            array_column($naming['path'], 'value'),
            $this->config['path_naming_rule']
        ), '/');

        $file = trim(str_replace(
            array_column($naming['file'], 'name'),
            array_column($naming['file'], 'value'),
            $this->config['file_naming_rule']
        ), '/') . '.' . get_file_ext($name);

        return $path . '/' . $file;
    }
}