/// <summary>
/// Reads JSON file, parsing valid data into ClockShapeList and logging errors.
/// </summary>
/// <param name="fileName"></param>
/// <param name="clockShapeList"></param>
/// <param name="shapePath"></param>
public ClocksFile(string fileName, List <ClockShape> clockShapeList, string shapePath)
{
ShapePath = shapePath;
ClockShapeList = clockShapeList;
JsonReader.ReadFile(fileName, TryParse);
// Filter out objects with essentials properties that are either incomplete or invalid.
ClockShapeList = ClockShapeList
.Where(r => !string.IsNullOrEmpty(r.Name) && r.ClockType != null)
.ToList();
}
/// <summary>
/// Parses next item from JSON data, populating a ClockShape and issuing error messages.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
protected virtual bool TryParse(JsonReader item)
{
var stringValue = "";
switch (item.Path)
{
case "":
// Ignore these items.
break;
case "[].":
// Create an object with properties which are initially incomplete, so omissions can be detected and the object rejected later.
ClockShape = new ClockShape(stringValue, null);
ClockShapeList.Add(ClockShape);
break;
case "[].Name":
// Parse the property with default value as invalid, so errors can be detected and the object rejected later.
stringValue = item.AsString(stringValue);
var path = ShapePath + stringValue;
ClockShape.Name = path;
if (string.IsNullOrEmpty(stringValue))
{
return(false);
}
if (File.Exists(path) == false)
{
Trace.TraceWarning($"Non-existent shape file {path} referenced in animated.clocks-or");
}
break;
case "[].ClockType":
stringValue = item.AsString(stringValue).ToLower();
if (stringValue == "analog")
{
ClockShape.ClockType = ClockType.Analog;
}
else
{
Trace.TraceWarning($"ClockType \"{stringValue}\" found, but \"analog\" expected");
return(false);
}
break;
default:
Trace.TraceWarning($"Unexpected entry \"{item.Path}\" found");
return(false);
}
return(true);
}