cloudmusic/cloudmusic/MusicRequest.swift

//
//  MusicRequest.swift
//  cloudmusic
//
//  Created by Qihua Pan on 2020/7/3.
//  Copyright © 2020 Qihua Pan. All rights reserved.
//

import UIKit
import Alamofire
import SwiftyJSON
//音乐接口请求
class MusicRequest: NSObject {
    
    //接口服务端地址
    private static let request_host = "192.168.50.73:5000"
    
    private static func request(url:String,callback:@escaping (JSON?) -> Void){
        debugPrint("搜索请求接口地址:\(url)")
         AF.request(url).responseJSON { response in
                debugPrint(response)
           
            if let data=response.data,let json = try? JSON(data: data){
                 callback(json)
             }else{
                 callback(nil)
             }
          
            }
        }
    
    //关键词搜索歌曲
    static func search(keyword:String,callback:@escaping (JSON?) -> Void ){
        let url="http://\(String(describing: request_host))/search?keywords=\(keyword)"
         request(url: url, callback: callback)
       }
    
    //获取音乐url
    static func searchUrl(id:Int32,callback:@escaping (JSON?) -> Void ){
        let url="http://\(String(describing: request_host))/song/url?id=\(id)"
        request(url: url, callback: callback)
    }
    
    //
    static func saveMusic(url:String,music:Music,callback:@escaping (Progress,URL) -> Void){
       let documentsURL = FileManager.default.urls(for: .downloadsDirectory, in: .userDomainMask)[0]
       let fileURL = documentsURL.appendingPathComponent("\(music.id).mp3")
       let destination: DownloadRequest.Destination = { _, _ in
           return (fileURL, [])
       }
        AF.download(url, to: destination)
        .downloadProgress { progress in
            callback(progress,fileURL)
        }
        .responseData { response in
            if let data=response.value{
                debugPrint("文件体积:\(data.count/(1024*1024))MB")
            }
        }
    }
}