<?php

namespace app\common\service;

use app\common\model\PostMedia;
use app\common\validate\PostValidate;
use app\common\traits\crud\CrudServiceTrait;
use app\common\model\Post;
use support\Redis;
use support\Request;

class PostService
{

    use CrudServiceTrait;

    /**
     * 指定当前要操作的模型
     */
    protected string $modelClass = Post::class;

    /**
     * 验证器
     */
    protected $validator = PostValidate::class;

    /**
     * 获取验证器
     */
    public function getValidator()
    {
        return  new $this->validator;
    }

    /**
     * 添加前置处理
     */
    public function beforeServiceStore($data, Request $request)
    {
        $data['user_id'] = $request->user->uid;;
        $media = serialize($data['media']);
        redis::set('PostMedia_'.$data['user_id'],$media,30);
        unset($data['media']);

        return $data;
    }

    /**
     * 添加后置处理
     */
    public function afterServiceStore($res)
    {
        $media = redis::get('PostMedia_'.$res['user_id']);
        $media = unserialize($media);
        foreach ($media as $v) {
            PostMedia::create([
                'post_id' => $res->id,
                'media_type' => $this->getMediaTypeByUrl($v['url']),
                'url' => $v['url'],
            ]);
        }
    }

    /**
     * 添加前置处理
     */
    public function beforeServiceUpdate($data, Request $request)
    {
        $data['user_id'] = $request->user->uid;;
        $media = serialize($data['media']);
        redis::set('PostMedia_'.$data['user_id'],$media,30);
        unset($data['media']);

        return $data;
    }

    /**
     * 添加后置处理
     */
    public function afterServiceUpdate($res)
    {
        PostMedia::where('post_id', $res->id)->delete();
        $media = redis::get('PostMedia_'.$res['user_id']);
        $media = unserialize($media);
        foreach ($media as $v) {
            PostMedia::create([
                'post_id' => $res->id,
                'media_type' => $this->getMediaTypeByUrl($v['url']),
                'url' => $v['url'],
            ]);
        }
    }

    function getMediaTypeByUrl(string $url): int
    {
        // 提取后缀
        $ext = strtolower(pathinfo(parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION));

        // 图片类型
        $imageExt = ['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp'];
        // 视频类型
        $videoExt = ['mp4', 'mov', 'avi', 'wmv', 'flv', 'mkv'];

        if (in_array($ext, $imageExt)) {
            return 1; // 图片
        }
        if (in_array($ext, $videoExt)) {
            return 2; // 视频
        }

        return 0; // 未知类型
    }
}