protected override DateTime GetItemLastModified(XmlElement source)
{
// Last modification time of a folder is computed as the most recent last modification
// time of any of its children walked recursively. Starting value is read from its
// attribute which can be set by a direct operation like renaming. Last modification
// of a file or of a common item has to be stored as an attribute of the item element
// otherwise the creation date is returned - the item has not been modified yet.
var modified = source.GetAttribute("Modified");
var date = string.IsNullOrEmpty(modified) ? GetItemCreated(source) :
ValueUtility.GetDate(modified);
if (GetItemType(source) == ItemType.Folder)
{
var children = source.ChildNodes.OfType <XmlElement>();
if (children.Any())
{
var maximum = children.Max(item => GetItemLastModified(item));
if (maximum > date)
{
date = maximum;
}
}
}
return(date);
}
protected override DateTime GetListLastDeleted(XmlElement source)
{
// Last deletion time inside a list has to be stored as an attribute otherwise an
// invalid value is returned.
var date = source.GetAttribute("Deleted");
return(string.IsNullOrEmpty(date) ? DateTime.MinValue : ValueUtility.GetDate(date));
}
DateTime GetListDate(XmlElement source, string name)
{
// List Properties Created and Modified come in the format YYYYMMDD HH:MM:SS. Other
// properties with a date value come in the format YYYY-MM-DD HH:MM:SS which is
// acceptable for the DateTime.Parse() method. Let's ensure the latter format.
var value = source.GetAttribute(name);
if (!value.Contains('-'))
{
value = value.Insert(6, "-").Insert(4, "-");
}
return(ValueUtility.GetDate(value));
}
public void TestGetDate()
{
Assert.AreEqual(new DateTime(2012, 11, 30), ValueUtility.GetDate("2012-11-30"));
Assert.AreEqual(new DateTime(2012, 11, 30, 01, 02, 03),
ValueUtility.GetDate("2012-11-30 01:02:03"));
try {
ValueUtility.GetDate("");
Assert.Fail();
} catch {}
try {
ValueUtility.GetDate("1");
Assert.Fail();
} catch {}
}
DateTime GetItemDate(XmlElement source, string rawName, string displayName)
{
var date = source.GetAttribute(rawName);
if (!string.IsNullOrEmpty(date))
{
return(ValueUtility.GetDate(date));
}
date = source.GetAttribute(displayName);
if (!string.IsNullOrEmpty(date))
{
return(ValueUtility.GetDate(ValueUtility.GetLookupValue(date)));
}
return(DateTime.MinValue);
}
protected override DateTime GetItemCreated(XmlElement source)
{
return(ValueUtility.GetDate(source.GetAttribute("Created")));
}
