| using Repoverse.Core.Generation; |
|
|
| namespace Repoverse.Core.Bridge; |
|
|
| public sealed record SourcePage(string Path, int Offset, string[] Lines, bool HasMore); |
| |
| public sealed class LocalSourceReader(WorldManifest manifest, string repo, string sourceRoot) |
| { |
| private readonly string _root = Path.GetFullPath(sourceRoot); |
| private readonly HashSet<string> _allowed = manifest.Buildings.Where(b => b.Repo.Key == repo.ToLowerInvariant()) |
| .SelectMany(b => b.Interior.Rooms).SelectMany(r => r.Artifacts).Select(a => a.Path).ToHashSet(StringComparer.Ordinal); |
| public SourcePage Read(string requestedRepo, string relative, int offset) |
| { |
| if (!requestedRepo.Equals(repo,StringComparison.OrdinalIgnoreCase) || !_allowed.Contains(relative)) |
| throw new ArgumentException("Source is not an artifact in the mapped repository."); |
| if (offset is < 0 or > 100_000 || Path.IsPathRooted(relative)) throw new ArgumentException("Invalid source page."); |
| var parts = relative.Replace('\\','/').Split('/'); |
| if (parts.Any(p => p is "" or "." or ".." || p.Contains(':'))) throw new ArgumentException("Invalid source path."); |
| |
| var target = _root; |
| if ((File.GetAttributes(target) & FileAttributes.ReparsePoint) != 0) throw new ArgumentException("Linked source roots are unsupported."); |
| foreach (var part in parts) { |
| target = Path.Combine(target,part); |
| if ((File.GetAttributes(target) & FileAttributes.ReparsePoint) != 0) throw new ArgumentException("Linked source paths are unsupported."); |
| } |
| if (new FileInfo(target).Length > 2*1024*1024) throw new ArgumentException("Source exceeds the 2 MiB inspection limit."); |
| var text = File.ReadAllText(target); |
| if (text.Contains('\0')) throw new ArgumentException("Binary artifact; open it in its native application."); |
| var lines = text.Replace("\r\n","\n").Split('\n'); |
| return new(relative,offset,lines.Skip(offset).Take(32).Select(s => s.Length>240 ? s[..240]+"..." : s).ToArray(),offset+32<lines.Length); |
| } |
| } |
|
|
