// TODO: Put strings into the resources.
//
IEnumerable <IMetadataTreeNode> P_LoadNodes(IMetadataLoadContext loadCtx, DirectoryInfo directory, IMetadataTreeNode parentNode = default, bool continuation = default)
{
loadCtx.EnsureNotNull(nameof(loadCtx));
directory.EnsureNotNull(nameof(directory));
//
loadCtx.ThrowIfCancellationRequested();
var buffer = continuation ? null : new List <IMetadataTreeNode>();
var fileNameAndNodeMap = new Dictionary <string, IMetadataTreeNode>(FileSystemAccessUtilities.DefaultPathComparer);
//
var files = directory.GetFiles(searchPattern: "*", searchOption: SearchOption.TopDirectoryOnly);
for (var i = 0; i < files.Length; i++)
{
loadCtx.ThrowIfCancellationRequested();
var file = files[i];
if (ShouldIncludeFile(context: loadCtx, file: file, mediaType: out var fileFormatMediaType))
{
var metadataElement =
new MetadataFileInclusionTreeElement()
{
LocationUri = new Uri(uriString: $"{UriUtilities.UriSchemeFile}://{file.FullName}", uriKind: UriKind.Absolute),
FormatMediaTypeName = fileFormatMediaType
};
var node = new MetadataTreeNode(parent: parentNode, caption: file.Name, metadataElement: metadataElement);
buffer?.Add(node);
fileNameAndNodeMap.Add(Path.GetFileNameWithoutExtension(file.Name), node);
}
}
//
var subdirectories = directory.GetDirectories(searchPattern: "*", searchOption: SearchOption.TopDirectoryOnly);
for (var i = 0; i < subdirectories.Length; i++)
{
loadCtx.ThrowIfCancellationRequested();
var subdirectory = subdirectories[i];
if (!fileNameAndNodeMap.TryGetValue(subdirectory.Name, out var subdirectoryParentNode))
{
MetadataName name;
try {
name = (MetadataName)subdirectory.Name;
}
catch (Exception exception) {
throw new EonException(message: $"Directory name can't be converted to metadata name (type '{typeof(MetadataName)}').{Environment.NewLine}\tDirectory:{subdirectory.FmtStr().GNLI2()}", innerException: exception);
}
var metadataElement = new EmbeddedMetadataTreeElement(embeddedMetadata: new Namespace(name: name), ownsEmbeddedMetadata: true);
var node = new MetadataTreeNode(parent: parentNode, caption: metadataElement.EmbeddedMetadata.Name, metadataElement: metadataElement);
buffer?.Add(node);
subdirectoryParentNode = node;
}
//
P_LoadNodes(loadCtx: loadCtx, directory: subdirectory, parentNode: subdirectoryParentNode, continuation: true);
}
//
return(buffer ?? Enumerable.Empty <IMetadataTreeNode>());
}
public override async Task <IEnumerable <IMetadataTreeNode> > LoadNodesAsync(IMetadataLoadContext loadCtx)
{
loadCtx.EnsureNotNull(nameof(loadCtx));
//
loadCtx.ThrowIfCancellationRequested();
return(await LoadNodesAsync(loadCtx : loadCtx, directory : GetLocationDirectory(loadCtx)).ConfigureAwait(false));
}
// TODO: Put strings into the resources.
// TODO_HIGH: Use SubjectMaterializer component to load metadata.
//
protected override async Task <IVh <IMetadata> > DoLoadMetadataAsync(IMetadataLoadContext loadCtx)
{
loadCtx.EnsureNotNull(nameof(loadCtx));
//
loadCtx.ThrowIfCancellationRequested();
await Task.CompletedTask;
return(doLoad());
//
IVh <IMetadata> doLoad()
{
var locDeserializedObjectAsIDisposable = default(IDisposable);
try {
var locFormatMediaTypeName = FormatMediaTypeName;
var locLocationUri = LocationUri;
//
string locLoadFilePath;
if (locLocationUri.IsAbsoluteUri)
{
locLoadFilePath = locLocationUri.LocalPath;
}
else
{
var locBaseUri = loadCtx.BaseUri;
string locBaseUriValidationErrorMessage;
if (!locBaseUri.IsAbsoluteUri)
{
throw
new EonException(
message: $"Базовый URI контекста загрузки метаданных не может быть использован для разрешения полного пути к файлу загрузки метаданных '{locLocationUri}'.{Environment.NewLine}{FormatXResource(typeof(Uri), "NotAbsoluteUri", locBaseUri.FmtStr().G())}{Environment.NewLine}\tКонтекст загрузки:{loadCtx.FmtStr().GNLI()}");
}
else if (!P_IsLocationUriValid(locBaseUri, out locBaseUriValidationErrorMessage))
{
throw
new EonException(
message: $"Базовый URI контекста загрузки метаданных не может быть использован для разрешения полного пути к файлу загрузки метаданных '{locLocationUri}'.{Environment.NewLine}{locBaseUriValidationErrorMessage}{Environment.NewLine}\tКонтекст загрузки:{loadCtx.FmtStr().GNLI2()}");
}
locLoadFilePath = Path.Combine(Path.GetDirectoryName(locBaseUri.LocalPath), locLocationUri.ToString());
}
var locLoadFile = new FileInfo(locLoadFilePath);
if (!locLoadFile.Exists)
{
throw new FileNotFoundException(FormatXResource(locator: typeof(FileNotFoundException), subpath: null, args: new[] { locLoadFile.FullName }), locLoadFile.FullName);
}
//
IMetadata locLoadedMetadata;
object locDeserializedObject;
if (IsXmlMediaType(locFormatMediaTypeName))
{
try {
using (var locFileStream = locLoadFile.OpenRead())
using (var locXmlReader = XmlReader.Create(locFileStream, loadCtx.CreateXmlReaderSettings())) {
var locSerializer = loadCtx.CreateXmlObjectSerializer(typeof(object));
locDeserializedObjectAsIDisposable = (locDeserializedObject = locSerializer.ReadObject(reader: locXmlReader, verifyObjectName: false)) as IDisposable;
}
if (locDeserializedObject is IMetadata locMetadata)
{
if (locMetadata.IsAutoName && MetadataName.TryParse(value: Path.GetFileNameWithoutExtension(path: locLoadFile.Name), result: out var metadataName))
{
locMetadata.Name = metadataName;
}
locLoadedMetadata = locMetadata;
}
else if (!(locDeserializedObject is null))
{
throw new EonException(message: $"Десериализованный объект имеет тип '{locDeserializedObject.GetType()}', который не совместим с типом '{typeof(IMetadata)}'.");
}
else
{
locLoadedMetadata = null;
}
}
catch (Exception exception) {
throw new EonException(message: $"Ошибка загрузки объекта из файла.{Environment.NewLine}\tФайл:{locLoadFile.FullName.FmtStr().GNLI2()}.", innerException: exception);
}
}
