private static void ReadJsonDiffRow(JObject node, PersistonDiff.DiffRow target, TableDef tableDef, bool allowChildren)
{
//copy fields in this row
foreach (var colDef in tableDef.Cols)
{
//get json value or skip
var jtoken = node.GetValue(colDef.Name, StringComparison.OrdinalIgnoreCase);
if (jtoken == null)
{
continue;
}
//copy
var value = ParseNode(jtoken, colDef.CSType);
target.Columns[colDef.Name] = value;
}
//recursively copy child rows
if (tableDef.Children != null && allowChildren)
{
foreach (var childTableDef in tableDef.Children)
{
if (target.ChildTables == null)
{
target.ChildTables = new Dictionary <TableDef, List <PersistonDiff.DiffRow> >();
}
if (!target.ChildTables.ContainsKey(childTableDef))
{
target.ChildTables[childTableDef] = new List <PersistonDiff.DiffRow>();
}
ReadJsonDiffRowArray(node, childTableDef, target.ChildTables[childTableDef]);
}
}
}
/// <summary>
/// Look for array nodes matching tableDef, such as Customer, Customer-new, Customer-deleted; and then
/// construct target rows based on the values found in those arrays
/// </summary>
private static void ReadJsonDiffRowArray(JObject parent, TableDef tableDef, List <PersistonDiff.DiffRow> targetA)
{
void ParseArray(string arrayName, DiffKind kind, bool allowChildren, bool fillInMissingNegativeKey)
{
var rows = parent[arrayName];
if (rows == null)
{
return;
}
if (!(rows is JArray rowsA))
{
throw new Exception($"Diff json nodes must be arrays");
}
foreach (var childNode in rowsA)
{
if (!(childNode is JObject childObject))
{
throw new Exception("Diff array members must be row objects, not values or arrays");
}
var target = new PersistonDiff.DiffRow()
{
Kind = kind
};
targetA.Add(target);
ReadJsonDiffRow(childObject, target, tableDef, allowChildren);
//if the client omits -1 primary key value on new rows, add it here; the save logic needs it but it is redundant from the client perspective
if (fillInMissingNegativeKey && !target.Columns.ContainsKey(tableDef.PrimaryKeyColName))
{
var newRowPK = Utils.ChangeType(-1, tableDef.FindCol(tableDef.PrimaryKeyColName).CSType);
target.Columns[tableDef.PrimaryKeyColName] = newRowPK;
}
}
}
string name = CamelCasify(tableDef.Name);
ParseArray(name, DiffKind.Other, true, false);
ParseArray(name + "-new", DiffKind.NewRow, true, true);
ParseArray(name + "-deleted", DiffKind.DeletedRow, false, false);
}
