/// <summary>
/// Initializes a new instance of the <see cref="NefsHeaderPart1"/> class.
/// </summary>
/// <param name="items">The list of items in the archive sorted by id.</param>
/// <param name="part4">Header part 4.</param>
internal NefsHeaderPart1(NefsItemList items, NefsHeaderPart4 part4)
{
this.entriesById = new SortedDictionary <NefsItemId, NefsHeaderPart1Entry>();
var nextMetadataIndex = 0U;
// Enumerate this list depth first. This determines the metadata index.
// The part 1 entries will be sorted by item id.
foreach (var item in items.EnumerateDepthFirstByName())
{
var entry = new NefsHeaderPart1Entry();
entry.Data0x00_OffsetToData.Value = item.DataSource.Offset;
entry.Data0x08_MetadataIndex.Value = nextMetadataIndex++;
entry.Data0x10_Id.Value = item.Id.Value;
entry.Data0x0c_IndexIntoPart4.Value = part4.GetIndexForItem(item);
this.entriesById.Add(item.Id, entry);
}
// Part 1 is sorted by item id
this.entriesByIndex = new List <NefsHeaderPart1Entry>(this.entriesById.Values);
}
/// <summary>
/// Initializes a new instance of the <see cref="NefsHeaderPart1"/> class.
/// </summary>
/// <param name="items">The list of items in the archive.</param>
/// <param name="part4">Header part 4.</param>
internal NefsHeaderPart1(NefsItemList items, INefsHeaderPart4 part4)
{
this.entriesByGuid = new Dictionary <Guid, NefsHeaderPart1Entry>();
var indexPart2 = 0U;
// Enumerate this list depth first. This determines the part 2 order. The part 1 entries
// will be sorted by item id.
foreach (var item in items.EnumerateDepthFirstByName())
{
var entry = new NefsHeaderPart1Entry(item.Guid);
entry.Data0x00_OffsetToData.Value = item.DataSource.Offset;
entry.Data0x08_IndexPart2.Value = indexPart2++;
entry.Data0x10_Id.Value = item.Id.Value;
entry.Data0x0c_IndexPart4.Value = part4.GetIndexForItem(item);
this.entriesByGuid.Add(item.Guid, entry);
}
// Sort part 1 by item id
this.entriesByIndex = new List <NefsHeaderPart1Entry>(this.entriesByGuid.Values.OrderBy(e => e.Id));
}
