public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
ProductStudioFullHistory fullHistory = (ProductStudioFullHistory)value;
writer.WriteStartArray();
IEnumerable <ProductStudioChangeHistory> changes = from change in fullHistory.ProductStudioChangeHistoryRecords
orderby change.AddedDate descending
select change;
foreach (ProductStudioChangeHistory change in changes)
{
if (!String.IsNullOrWhiteSpace(change.Value))
{
writer.WriteStartObject();
writer.WritePropertyName("when");
writer.WriteValue(change.AddedDate.ToUniversalTime().ToString("u"));
writer.WritePropertyName("who");
writer.WriteValue(change.ChangedBy ?? String.Empty);
writer.WritePropertyName("comment");
writer.WriteValue(change.Value);
writer.WriteEndObject();
}
}
writer.WriteEndArray();
}
public static ProductStudioFullHistory LoadFullHistory(string rawHistory)
{
if (String.IsNullOrWhiteSpace(rawHistory))
{
return(new ProductStudioFullHistory());
}
Debug.Assert(xmlSerializer != null, "xmlSerializer must be initialized in the static constructor.");
//Comes from database as ChangeHistroy entries with no root node. Need to wrap in root node to deserialize with XmlSerializer.
string rawHistoryXml = String.Format("<ProductStudioFullHistory><ProductStudioChangeHistoryRecords>{0}</ProductStudioChangeHistoryRecords></ProductStudioFullHistory>", rawHistory);
using (TextReader reader = new StringReader(rawHistoryXml))
{
try
{
ProductStudioFullHistory hist = (ProductStudioFullHistory)xmlSerializer.Deserialize(reader);
foreach (ProductStudioChangeHistory change in hist.ProductStudioChangeHistoryRecords)
{
change.Value = ItemProviderUtilities.ConvertLineBreaksToHtml(change.Value);
}
return(hist);
}
catch (InvalidOperationException)
{
//There was data in the field, but it couldn't be deserialized as ProductStudioChangeHistory records.
//We still want the data so create a single ChangeHistory record and return the entire contents of this
//as the value.
ProductStudioFullHistory hist = new ProductStudioFullHistory();
hist.ProductStudioChangeHistoryRecords.Add(new ProductStudioChangeHistory()
{
Value = rawHistory
});
return(hist);
}
}
}
