public async Task <IReadOnlyList <FSFile> > GetAll(FSTable table, string page)
{
var tableFolder = FindTableFolder(table, page);
StorageFile[] tableFiles = tableFolder.GetFilesOrderedByName();
return(await ReadFiles(table, tableFiles));
}
public async Task <IReadOnlyList <FSFile> > GetRange(FSTable table, uint startIndex, uint maxCount, string page)
{
var tableFolder = FindTableFolder(table, page);
var tableFiles = tableFolder.GetFilesOrderedByName((int)startIndex, (int)maxCount);
return(await ReadFiles(table, tableFiles));
}
public async Task DeleteTableIfExists(FSTable table, string page)
{
StorageFolder tableFolder = FindTableFolder(table, page);
if (tableFolder == null)
{
return;
}
tableFolder.DeleteIfExists();
await Task.CompletedTask;
}
public async Task UpdateFile(FSTable table, FSFile file, string page)
{
if (table == null || file?.Id == null)
{
throw new ArgumentException();
}
var tableFolder = FindTableFolder(table, page);
var storageFile = tableFolder.TryGetFile(file.Id);
FileIO.WriteBytes(storageFile, file.Contents);
await Task.CompletedTask;
}
public async Task <FSFile> FindFile(FSTable table, string id, string page)
{
if (table == null || id == null)
{
throw new ArgumentException();
}
var tableFolder = FindTableFolder(table, page);
StorageFile storageFile = tableFolder.TryGetFile(id);
if (storageFile == null)
{
return(null);
}
byte[] buffer = FileIO.ReadBuffer(storageFile);
return(new FSFile(buffer.ToArray(), id));
}
StorageFolder FindTableFolder(FSTable table, string page)
{
StorageFolder tableFolder = this.storeFolder.TryGetItemAsync(table.TableFolderName());
if (tableFolder == null)
{
return(null);
}
if (!table.IsPaged || page == null)
{
return(tableFolder);
}
StorageFolder pageFolder = tableFolder.CreateFolderAsync(page, CreationCollisionOption.OpenIfExists);
return(pageFolder);
}
public async Task DeleteFileIfExists(FSTable table, string id, string page)
{
if (table == null || id == null)
{
throw new ArgumentException();
}
var tableFolder = FindTableFolder(table, page);
StorageFile storageFile = tableFolder.TryGetFile(id);
if (storageFile == null)
{
return;
}
storageFile.Delete();
await Task.CompletedTask;
}
async Task <List <FSFile> > ReadFiles(FSTable table, IReadOnlyList <StorageFile> tableFiles)
{
var files = new List <FSFile>();
if (!table.ReadListInReverseOrder)
{
for (var i = 0; i < tableFiles.Count; i++)
{
var buffer = FileIO.ReadBuffer(tableFiles[i]);
files.Add(new FSFile(buffer.ToArray(), tableFiles[i].Name));
}
}
else
{
for (var i = tableFiles.Count - 1; i >= 0; i--)
{
var buffer = FileIO.ReadBuffer(tableFiles[i]);
files.Add(new FSFile(buffer.ToArray(), tableFiles[i].Name));
}
}
return(files);
}
public async Task <string> InsertFile(FSTable table, string itemId, Func <string, object, object, byte[]> doSerialize, object serFun, object entity, string page = null, int currentAttmept = 1)
{
if (table == null || doSerialize == null)
{
throw new ArgumentException();
}
var tableFolder = FindTableFolder(table, page);
if (table.IdMode == IdMode.UserGenerated)
{
StorageFile newFile = tableFolder.CreateFile(itemId, CreationCollisionOption.FailIfExists);
FileIO.WriteBytes(newFile, doSerialize(newFile.Name, serFun, entity));
return(newFile.Name);
}
string nextId = GetNextId(tableFolder);
try
{
StorageFile newFile = tableFolder.CreateFile(nextId, CreationCollisionOption.FailIfExists);
FileIO.WriteBytes(newFile, doSerialize(newFile.Name, serFun, entity));
return(newFile.Name);
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
Debug.WriteLine($"Insert Attempt {currentAttmept} failed.");
uint dummy;
FStoreTables.IdCache.TryRemove(tableFolder.Name, out dummy);
if (currentAttmept > 10)
{
throw;
}
return(await InsertFile(table, itemId, doSerialize, serFun, entity, page, currentAttmept + 1));
}
}
public void CreateTable(FSTable table)
{
var store = this.storeFolder;
store.CreateFolderAsync(table.TableFolderName(), CreationCollisionOption.FailIfExists);
}
public bool TableExists(FSTable table, string page)
{
var tableFolder = FindTableFolder(table, page);
return(tableFolder != null);
}
public async Task <uint> CountFiles(FSTable table, string page)
{
var tableFolder = FindTableFolder(table, page);
return(tableFolder.CountFiles());
}
