using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using DotNet.Globbing;
using FluentValidation;
using MfGames.Gallium;
using MfGames.Nitride.Contents;
using Zio;
namespace MfGames.Nitride.IO.Contents;
///
/// A module that reads files from the file system and wraps them in an
/// entity with the following components: UPath, IContent.
///
[WithProperties]
public partial class ReadFiles : FileSystemOperationBase
{
private readonly IValidator validator;
public ReadFiles(
IValidator validator,
IFileSystem fileSystem)
: base(fileSystem)
{
this.validator = validator;
}
///
/// Gets or sets the file pattern to retrieve fields. This supports
/// globbing both "*" and "**" patterns such as "**/*".
///
public string Pattern { get; set; } = null!;
///
/// Reads all files from the file system, filtering them out by the
/// minimatch pattern (as defined by DotNet.Blob).
///
/// A populated collection of entities.
public IEnumerable Run()
{
return this.Run(Array.Empty());
}
///
/// Reads all files from the file system, filtering them out by the
/// minimatch pattern (as defined by DotNet.Blob).
///
/// A populated collection of entities.
public override IEnumerable Run(IEnumerable input)
{
this.validator.ValidateAndThrow(this);
var glob = Glob.Parse(this.Pattern);
IEnumerable files = this.FileSystem.EnumerateFileEntries("/", "*", SearchOption.AllDirectories)
.Where(x => glob.IsMatch(x.Path.ToString()));
IEnumerable entities = files.Select(this.ToEntity);
return entities;
}
public ReadFiles WithFileSystem(IFileSystem value)
{
this.FileSystem = value;
return this;
}
///
/// Creates an entity with the standard components for all Zio-based
/// files. This attaches the file's path relative to the file system
/// and a way of accessing the content from the file system.
///
/// The Zio file entry.
/// An Entity with appropriate content.
private Entity ToEntity(FileEntry file)
{
Entity entity = new Entity().Set(file.Path)
.SetBinaryContent(new FileEntryBinaryContent(file));
return entity;
}
}