using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using LibGit2Sharp.Core;
using LibGit2Sharp.Core.Handles;
namespace LibGit2Sharp
{
///
/// A container which references a list of other s and s.
///
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class Tree : GitObject, IEnumerable
{
private readonly FilePath path;
private readonly ILazy lazyCount;
///
/// Needed for mocking purposes.
///
protected Tree()
{ }
internal Tree(Repository repo, ObjectId id, FilePath path)
: base(repo, id)
{
this.path = path ?? "";
lazyCount = GitObjectLazyGroup.Singleton(repo, id, Proxy.git_tree_entrycount);
}
///
/// Gets the number of immediately under this .
///
public virtual int Count { get { return lazyCount.Value; } }
///
/// Gets the pointed at by the in this instance.
///
/// The relative path to the from this instance.
/// null if nothing has been found, the otherwise.
public virtual TreeEntry this[string relativePath]
{
get { return RetrieveFromPath(relativePath); }
}
private TreeEntry RetrieveFromPath(FilePath relativePath)
{
if (relativePath.IsNullOrEmpty())
{
return null;
}
using (TreeEntrySafeHandle_Owned treeEntryPtr = Proxy.git_tree_entry_bypath(repo.Handle, Id, relativePath))
{
if (treeEntryPtr == null)
{
return null;
}
string posixPath = relativePath.Posix;
string filename = posixPath.Split('/').Last();
string parentPath = posixPath.Substring(0, posixPath.Length - filename.Length);
return new TreeEntry(treeEntryPtr, Id, repo, path.Combine(parentPath));
}
}
internal string Path
{
get { return path.Native; }
}
#region IEnumerable Members
///
/// Returns an enumerator that iterates through the collection.
///
/// An object that can be used to iterate through the collection.
public virtual IEnumerator GetEnumerator()
{
using (var obj = new ObjectSafeWrapper(Id, repo.Handle))
{
for (uint i = 0; i < Count; i++)
{
TreeEntrySafeHandle handle = Proxy.git_tree_entry_byindex(obj.ObjectPtr, i);
yield return new TreeEntry(handle, Id, repo, path);
}
}
}
///
/// Returns an enumerator that iterates through the collection.
///
/// An object that can be used to iterate through the collection.
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
#endregion
private string DebuggerDisplay
{
get
{
return string.Format(CultureInfo.InvariantCulture,
"{0}, Count = {1}", Id.ToString(7), Count);
}
}
}
}