feat: Completed ncm convert function.

完成 ncm 歌曲转换功能。

src/ZonyLrcTools.Cli/Commands/UtilityCommand.cs

@@ -1,9 +1,14 @@
+using System;
 using System.ComponentModel.DataAnnotations;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 using McMaster.Extensions.CommandLineUtils;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json.Linq;
+using ZonyLrcTools.Cli.Infrastructure.Exceptions;
 using ZonyLrcTools.Cli.Infrastructure.IO;
+using ZonyLrcTools.Cli.Infrastructure.MusicDecryption;
 using ZonyLrcTools.Cli.Infrastructure.Threading;
 
 namespace ZonyLrcTools.Cli.Commands
@@ -20,45 +25,79 @@ namespace ZonyLrcTools.Cli.Commands
     [Command("util", Description = "提供常用的工具类功能。")]
     public class UtilityCommand : ToolCommandBase
     {
+        private readonly ILogger<UtilityCommand> _logger;
+        private readonly IMusicDecryptor _musicDecryptor;
+
         [Required(ErrorMessage = "音乐格式为必须参数，请指定 -t 参数。")]
         [Option("-t|--type", CommandOptionType.SingleValue, Description = "需要转换的文件格式，参数[Ncm、Qcm]。", ShowInHelpText = true)]
         public SupportFileType Type { get; set; }
 
         [Required(ErrorMessage = "文件路径为必须按参数，请传入有效路径。")]
-        [Argument(0, "Path", "指定需要转换的音乐文件路径，支持目录和文件路径。")]
-        public string Path { get; set; }
+        [Argument(0, "FilePath", "指定需要转换的音乐文件路径，支持目录和文件路径。")]
+        public string FilePath { get; set; }
 
         private readonly IFileScanner _fileScanner;
 
-        public UtilityCommand(IFileScanner fileScanner)
+        public UtilityCommand(IFileScanner fileScanner,
+            ILogger<UtilityCommand> logger,
+            IMusicDecryptor musicDecryptor)
         {
             _fileScanner = fileScanner;
+            _logger = logger;
+            _musicDecryptor = musicDecryptor;
         }
 
         protected override async Task<int> OnExecuteAsync(CommandLineApplication app)
         {
-            if (Directory.Exists(Path))
+            if (Directory.Exists(FilePath))
             {
-                var files = await _fileScanner.ScanAsync(Path, new[] {"*.ncm"});
+                _logger.LogInformation("开始扫描文件夹，请稍等...");
+
+                var files = (await _fileScanner.ScanAsync(FilePath, new[] {"*.ncm"}))
+                    .SelectMany(f => f.FilePaths)
+                    .ToList();
+
+                _logger.LogInformation($"扫描完成，共 {files.Count} 个文件，准备转换。");
 
                 var wrapTask = new WarpTask(4);
-                var tasks = files
-                    .SelectMany(f => f.FilePaths)
-                    .Select(path => wrapTask.RunAsync(() => Convert(path)));
+                var tasks = files.Select(path => wrapTask.RunAsync(() => Convert(path)));
 
                 await Task.WhenAll(tasks);
             }
-            else if (File.Exists(Path))
+            else if (File.Exists(FilePath))
             {
-                await Convert(Path);
+                await Convert(FilePath);
             }
 
+            _logger.LogInformation("所有文件已经转换完成...");
+
             return 0;
         }
 
         private async Task Convert(string filePath)
         {
-            await Task.CompletedTask;
+            if (Type != SupportFileType.Ncm)
+            {
+                throw new ErrorCodeException(ErrorCodes.OnlySupportNcmFormatFile);
+            }
+
+            var memoryStream = new MemoryStream();
+            await using var file = File.Open(filePath, FileMode.Open);
+            {
+                var buffer = new Memory<byte>(new byte[2048]);
+                while (await file.ReadAsync(buffer) > 0)
+                {
+                    await memoryStream.WriteAsync(buffer);
+                }
+            }
+
+            var result = await _musicDecryptor.ConvertMusic(memoryStream.ToArray());
+            var newFileName = Path.Combine(Path.GetDirectoryName(filePath),
+                $"{Path.GetFileNameWithoutExtension(filePath)}.{((JObject) result.ExtensionObjects["JSON"]).SelectToken("$.format").Value<string>()}");
+
+            await using var musicFileStream = File.Create(newFileName);
+            await musicFileStream.WriteAsync(result.Data);
+            await musicFileStream.FlushAsync();
         }
     }
 }

src/ZonyLrcTools.Cli/Infrastructure/Exceptions/ErrorCodes.cs

@@ -81,6 +81,11 @@ namespace ZonyLrcTools.Cli.Infrastructure.Exceptions
         /// </summary>
         public const int HttpResponseConvertJsonFailed = 50010;
 
+        /// <summary>
+        /// 文本: 目前仅支持 NCM 格式的歌曲转换操作。
+        /// </summary>
+        public const int OnlySupportNcmFormatFile = 50011;
+
         #endregion
     }
 }

src/ZonyLrcTools.Cli/Resources/error_msg.json

@@ -15,6 +15,7 @@
     "50007": "TagLib 标签读取器出现了预期之外的异常。",
     "50008": "服务接口限制，无法进行请求，请尝试使用代理服务器。",
     "50009": "对目标服务器执行 Http 请求失败。",
-    "50010": "Http 请求的结果反序列化为 Json 失败。"
+    "50010": "Http 请求的结果反序列化为 Json 失败。",
+    "50011": "目前仅支持 NCM 格式的歌曲转换操作。"
   }
 }