/// <summary>
/// Materializes an instance from an Item structure returned by the Mega API, treated as a template for this item.
/// Parent-child relationships are not automatically linked up - that is left up to the creator.
/// </summary>
internal static CloudItem FromTemplate(Item template, MegaClient client)
{
Argument.ValidateIsNotNull(template, "template");
Argument.ValidateIsNotNull(client, "client");
CloudItem item = new CloudItem(client)
{
TypeID = template.Type,
// Filter out invalid sizes that Mega does not work with (anything less than 1).
Size = template.Size.GetValueOrDefault() > 0 ? (long?)template.Size.Value : null,
ID = template.ID,
OwnerID = template.OwnerID,
LastUpdated = new DateTimeOffset(1970, 1, 1, 0, 0, 0, TimeSpan.Zero).AddSeconds(template.Timestamp).ToLocalTime(),
ParentID = template.ParentID,
EncryptedKeys = template.EncryptedKeys.ToImmutableHashSet(),
IsShareRoot = template.ShareKey.HasValue
};
bool hasEncryptedData = true;
switch (template.Type)
{
case KnownItemTypes.File:
item.Type = ItemType.File;
break;
case KnownItemTypes.Folder:
item.Type = ItemType.Folder;
break;
case KnownItemTypes.Inbox:
item.Type = ItemType.Inbox;
hasEncryptedData = false;
break;
case KnownItemTypes.Trash:
item.Type = ItemType.Trash;
hasEncryptedData = false;
break;
case KnownItemTypes.Files:
item.Type = ItemType.Files;
hasEncryptedData = false;
break;
default:
item.Type = ItemType.Unknown;
break;
}
if (hasEncryptedData)
{
// Decrypt the item attributes, if the item has them and if we have a key.
var itemKey = client.DecryptItemKey(item.EncryptedKeys);
// We have a key for this item!
var attributesKey = Algorithms.DeriveNodeAttributesKey(itemKey);
item.Attributes = ItemAttributes.DecryptAndDeserialize(template.Attributes, attributesKey);
}
return item;
}