/// <inheritdoc />
public ChangeSet GetChangeSet(ChangePath path, bool commit = false)
{
if (!HasChanges)
{
return(null);
}
path = path.WithTarget(ChangeTarget.Collection);
var changes = new ChangeSet();
foreach (var item in Items.Where(i => i.HasChanges))
{
changes.Merge(
item.GetChangeSet(path.AppendIndex(item.Index), commit));
}
foreach (var removed in Removed)
{
changes.Merge(
removed.GetChangeSet(path.AppendIndex(removed.Index), commit));
}
if (commit)
{
Removed.Clear();
}
return(changes);
}
/// <summary>
/// Creates a <see cref="ChangeSet"/> using the specified path and values.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="values">The values.</param>
/// <returns></returns>
public static ChangeSet Create(ChangePath path, params ChangeValue[] values)
{
var changeSet = new ChangeSet();
changeSet.Append(path, values);
return(changeSet);
}
/// <summary>
/// Determines whether or not the <see cref="ChangePath"/> starts with
/// the provided <paramref name="changePath"/>.
/// </summary>
/// <param name="changePath">The <see cref="ChangePath"/> to check that is starts with.</param>
/// <returns></returns>
public bool StartsWith(ChangePath changePath)
{
using (var enumerator1 = changePath.Parts.GetEnumerator())
using (var enumerator2 = Parts.GetEnumerator())
{
while (enumerator1.MoveNext())
{
// If we can't move any further with the current path,
// then the path we are checking is longer and cannot
// possible be a match.
if (!enumerator2.MoveNext())
{
return(false);
}
// If a part doesn't match, then it doesn't start the path we are checking.
if (!Equals(enumerator1.Current, enumerator2.Current))
{
return(false);
}
}
// We matched all of the parts of the path we were checking,
// so it does start with the path.
return(true);
}
}
/// <summary>
/// Appends the path and values to the <see cref="ChangeSet"/>.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="values">The values.</param>
public void Append(ChangePath path, params ChangeValue[] values)
{
if (!ContainsKey(path))
{
this[path] = new List <ChangeValue>();
}
this[path].AddRange(values);
}
/// <inheritdoc />
public ChangeSet GetChangeSet(ChangePath path, bool commit = false)
{
if (!HasChanges)
{
return(null);
}
var changes = new ChangeSet();
foreach (var change in Changes)
{
changes.Merge(change.Value.GetChangeSet(path.AppendProperty(change.Key), commit));
}
return(changes);
}
/// <summary>
/// Commits the changes.
/// </summary>
/// <param name="target">The target.</param>
/// <param name="path">The path the change set represents.</param>
/// <returns>A <see cref="ChangeSet"/> containing the committed changes.</returns>
public static ChangeSet CommitChanges(this ITracksChanges target, ChangePath path)
{
return(target.GetChangeSet(path, commit: true));
}
