/// <summary>
/// Create a full snapshort of this table
/// </summary>
/// <returns></returns>
public TableDto ToSnapshot()
{
var dto = new TableDto
{
TableName = this.TableName,
Id = this.TableName,
DateTime = this.DateTime,
RowsCount = Data.GetLength(0),
ColumnsCount = Data.GetLength(1),
IsComplete = true,
Version = Version,
Cells = new List <TableCell>()
};
for (int row = 0; row < dto.RowsCount; row++)
{
for (int column = 0; column < dto.ColumnsCount; column++)
{
var value = Data[row, column];
// default(Variant) has this type
if (value.TypeEnum == TypeEnum.None)
{
continue;
}
dto.Cells.Add(new TableCell
{
Row = row,
Column = column,
Value = value
});
}
}
return(dto);
}
public static Table FromSnapshot(TableDto dto)
{
if (!dto.IsComplete)
{
throw new ArgumentException("Snapshot must be complete");
}
var table = new Table(dto.RowsCount, dto.ColumnsCount)
{
TableName = dto.TableName,
DateTime = dto.DateTime,
Version = dto.Version,
};
foreach (var cell in dto.Cells)
{
table.Data[cell.Row, cell.Column] = cell.Value;
}
return(table);
}
public TableDto ToDelta(Table previous)
{
if (RowsCount != previous.RowsCount || ColumnsCount != previous.ColumnsCount)
{
return(ToSnapshot());
}
var dto = new TableDto
{
TableName = this.TableName,
Id = this.TableName,
DateTime = this.DateTime,
RowsCount = Data.GetLength(0),
ColumnsCount = Data.GetLength(1),
IsComplete = false,
Version = Version,
Cells = new List <TableCell>()
};
for (var row = 0; row < dto.RowsCount; row++)
{
for (var column = 0; column < dto.ColumnsCount; column++)
{
var value = Data[row, column];
var previousValue = previous.Data[row, column];
if (value == previousValue)
{
continue;
}
dto.Cells.Add(new TableCell
{
Row = row,
Column = column,
Value = value
});
}
}
return(dto);
}
public static Table ApplyDelta(Table previous, TableDto dto)
{
if (previous.RowsCount != dto.RowsCount || previous.ColumnsCount != dto.ColumnsCount || dto.IsComplete)
{
Trace.Assert(dto.IsComplete);
return(FromSnapshot(dto));
}
var dataCopy = (Variant[, ])previous.Data.Clone();
var table = new Table(dataCopy)
{
TableName = dto.TableName,
DateTime = dto.DateTime,
Version = dto.Version,
};
foreach (var cell in dto.Cells)
{
table.Data[cell.Row, cell.Column] = cell.Value;
}
return(table);
}