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Implement PackageFileResolver as an IFileResolver for VPK/PAK packages
Resolves #33
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using Sledge.Formats.FileSystem; | ||
|
|
||
| namespace Sledge.Formats.Packages.FileSystem | ||
| { | ||
| /// <summary> | ||
| /// A file resolver for a package. | ||
| /// </summary> | ||
| public class PackageFileResolver : IFileResolver, IDisposable | ||
| { | ||
| private readonly bool _leaveOpen; | ||
| private readonly IPackage _package; | ||
|
|
||
| /// <summary> | ||
| /// Create an instance wrapping an <see cref="IPackage"/> instance. | ||
| /// </summary> | ||
| /// <param name="package">The <see cref="IPackage"/> instance</param> | ||
| /// <param name="leaveOpen">False to dispose the package when this instance is disposed, true to leave it undisposed</param> | ||
| public PackageFileResolver(IPackage package, bool leaveOpen = false) | ||
| { | ||
| _package = package; | ||
| _leaveOpen = leaveOpen; | ||
| } | ||
|
|
||
| private string NormalisePath(string path) | ||
| { | ||
| return path.TrimStart('/'); | ||
| } | ||
|
|
||
| public bool FolderExists(string path) | ||
| { | ||
| path = NormalisePath(path) + "/"; | ||
| if (path == "/") return true; | ||
| return _package.Entries.Any(x => x.Path.StartsWith(path)); | ||
| } | ||
|
|
||
| public bool FileExists(string path) | ||
| { | ||
| path = NormalisePath(path); | ||
| return _package.Entries.Any(x => x.Path == path); | ||
| } | ||
|
|
||
| public long FileSize(string path) | ||
| { | ||
| path = NormalisePath(path); | ||
| var entry = _package.Entries.FirstOrDefault(x => x.Path == path) ?? throw new FileNotFoundException(); | ||
| return entry.Size; | ||
| } | ||
|
|
||
| public Stream OpenFile(string path) | ||
| { | ||
| path = NormalisePath(path); | ||
| var entry = _package.Entries.FirstOrDefault(x => x.Path == path) ?? throw new FileNotFoundException(); | ||
| return _package.Open(entry); | ||
| } | ||
|
|
||
| public IEnumerable<string> GetFiles(string path) | ||
| { | ||
| if (!FolderExists(path)) throw new DirectoryNotFoundException(); | ||
| path = NormalisePath(path) + "/"; | ||
| if (path == "/") path = ""; | ||
|
|
||
| return _package.Entries.Where(x => x.Path != path && x.Path.StartsWith(path)) | ||
| .Select(x => x.Path.Substring(path.Length)) | ||
| .Where(x => !x.Contains('/')) | ||
| .Select(x => path + x); | ||
| } | ||
|
|
||
| public IEnumerable<string> GetFolders(string path) | ||
| { | ||
| if (!FolderExists(path)) throw new DirectoryNotFoundException(); | ||
| path = NormalisePath(path) + "/"; | ||
| if (path == "/") path = ""; | ||
|
|
||
| return _package.Entries.Where(x => x.Path != path && x.Path.StartsWith(path)) | ||
| .Select(x => x.Path.Substring(path.Length)) | ||
| .Where(x => x.Contains('/')) | ||
| .Select(x => path + x.Split('/').First()) | ||
| .Distinct(); | ||
| } | ||
|
|
||
| public void Dispose() | ||
| { | ||
| if (_leaveOpen) return; | ||
| _package?.Dispose(); | ||
| } | ||
| } | ||
| } |
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