protected internal async Task <EntryData> CreateDirectory(string directoryName, SqlTransaction transaction)
{
EntryData result = new EntryData();
if (!string.IsNullOrEmpty(directoryName))
{
string[] spl = directoryName.Split('\\');
EntryData parent = null;
foreach (var directory in spl)
{
EntryData pathLocator = await GetEntryData(entryName : directory, parentLocator : parent, isDirectory : true, transaction : transaction);
result = pathLocator ?? await CreateEntry(entryName : directory, parentLocator : parent, isDirectory : true, content : null, transaction : transaction);
parent = result;
}
}
else
{
result = null;
}
return(result);
}
protected internal async Task <EntryData> GetEntryData(string entryName, EntryData parentLocator, bool isDirectory, SqlTransaction transaction)
{
EntryData result = new EntryData();
DataTable dt = await qs.FillDataTableInTransactionAsync(() => parentLocator == null
?FormatQuery(SqlStrings.GetEntryDataRoot)
: FormatQuery(SqlStrings.GetEntryDataWithParent),
transaction,
p =>
{
if (parentLocator != null)
{
p.AddWithValue("@ParentPathLocator", parentLocator.PathLocator);
}
p.AddWithValue("@EntryType", isDirectory ? 1 : 0);
p.AddWithValue("@Name", entryName);
}, CommandType.Text);
if (dt.Rows.Count == 1)
{
result.LoadFromDataTable(dt);
}
else
{
result = null;
}
return(result);
}
protected async Task <EntryData> WriteAllBytes(string path, byte[] bytes, bool allowDeduplication)
{
EntryData newOrUpdatedEntry = null;
// In case of duplication allowed, trying to find clone of object in hash table
if (allowDeduplication)
{
Guid hash = GetMD5Hash(bytes);
EntryData duplicatedEntry = null;
await qs.BeginTransactionAsync(async connection =>
{
object streamId = await qs.ExecuteScalarInTransactionAsync(FormatQuery(SqlStrings.GetStreamIdByHash),
connection,
p =>
{
p.AddWithValue("@Hash", hash);
}, CommandType.Text);
if (streamId != null)
{
duplicatedEntry = await GetEntryData((Guid)streamId, false, connection);
if (duplicatedEntry != null) // Original file was removed
{
duplicatedEntry.IsDuplicate = true;
duplicatedEntry.Hash = hash;
}
}
});
if (duplicatedEntry != null) // Clone finded, returning
{
return(duplicatedEntry);
}
}
string directory = Utils._FormatFirectoryName(System.IO.Path.GetDirectoryName(path));
string file = System.IO.Path.GetFileName(path);
await qs.BeginTransactionAsync(async transaction =>
{
EntryData directoryLocator = await CreateDirectory(directory, transaction);
EntryData entryPathLocator = await GetEntryData(file, directoryLocator, false, transaction);
newOrUpdatedEntry = entryPathLocator == null ? await CreateEntry(file, directoryLocator, false, bytes, transaction)
: await UpdateEntry(file, entryPathLocator, bytes, transaction);
// Insert hash info if hashTable specified
if (allowDeduplication)
{
newOrUpdatedEntry.Hash = GetMD5Hash(newOrUpdatedEntry.Content);
await UpdateHashTable(newOrUpdatedEntry, transaction);
}
});
return(newOrUpdatedEntry);
}
public async Task <byte[]> ReadAllBytes(Guid streamId)
{
EntryData entryData = null;
qs.BeginTransaction(async transaction =>
{
entryData = await GetEntryData(streamId: streamId, getContent: true, transaction: transaction);
});
return(entryData.Content);
}
public async Task <EntryData> CreateDirectoryAsync(string directoryName)
{
EntryData result = null;
await qs.BeginTransactionAsync(transaction =>
{
return(base.CreateDirectory(directoryName, transaction));
});
return(result);
}
public async Task <bool> ExistsAsync(string path)
{
EntryData pathLocator = null;
await qs.BeginTransactionAsync(async transaction =>
{
pathLocator = await GetEntryData(entryName: path, parentLocator: null, isDirectory: false, transaction: transaction);
});
return(pathLocator != null);
}
private async Task UpdateHashTable(EntryData entry, SqlTransaction transaction)
{
entry.Hash = GetMD5Hash(entry.Content);
await qs.ExecuteNonQueryInTransactionAsync(FormatQuery(SqlStrings.UpdateHashTable), transaction,
p =>
{
p.AddWithValue("@StreamId", entry.StreamId);
p.AddWithValue("@Hash", entry.Hash);
},
CommandType.Text);
}
private async Task <EntryData> UpdateEntry(string entryName, EntryData entryData, byte[] content, SqlTransaction transaction)
{
qs.ExecuteNonQueryInTransaction(FormatQuery(SqlStrings.UpdateEntry),
transaction,
p =>
{
p.AddWithValue("@EntryName", entryName);
p.AddWithValue("@StreamId", entryData.StreamId);
p.AddWithValue("@PathLocator", entryData.PathLocator);
p.AddWithValue("@FileStream", content ?? Utils._StringToByteArray("0x"));
}, CommandType.Text);
EntryData result = await GetEntryData(entryData.StreamId, false, transaction);
result.Content = content;
return(result);
}
protected internal async Task <EntryData> GetEntryData(Guid streamId, bool getContent, SqlTransaction transaction)
{
EntryData result = new EntryData();
DataTable dt = await qs.FillDataTableInTransactionAsync(FormatQuery(getContent ? SqlStrings.GetEntryDataWithContentByStreamId : SqlStrings.GetEntryDataByStreamId),
transaction,
p =>
{
p.AddWithValue("@StreamId", streamId);
}, CommandType.Text);
if (dt.Rows.Count != 0)
{
result.LoadFromDataTable(dt);
}
else
{
result = null;
}
return(result);
}
private async Task <EntryData> CreateEntry(string entryName, EntryData parentLocator, bool isDirectory, byte[] content, SqlTransaction transaction)
{
EntryData result = new EntryData();
DataTable dt = await qs.FillDataTableInTransactionAsync(FormatQuery(SqlStrings.CreateEntry),
transaction,
p =>
{
var varbinary = p.Add("FileStream", SqlDbType.VarBinary);
varbinary.Value = content ?? (object)DBNull.Value;
p.AddWithValue("@EntryName", entryName);
p.AddWithValue("@EntryType", isDirectory ? 1 : 0);
p.AddWithValue("@ParentLocator", parentLocator == null ? "/" : parentLocator.PathLocator);
}, CommandType.Text);
if (dt.Rows.Count != 0)
{
result.LoadFromDataTable(dt);
}
result.Content = content;
return(result);
}