/// <summary>
/// Inserts avalidation message at the specified index.
/// </summary>
/// <param name="index">The index.</param>
/// <param name="message">The message.</param>
public new void Insert(int index, ValidationMessage message)
{
index.MustBeBetween(0, this.Count);
message.CannotBeNull();
ValidationMessageCollection messages = this[message.ValidationSource, message.PropertyName, message.ValidationContext];
if (messages != null &&
messages.Count > 0)
{
// insert only if there are no messages with higher validation level for this property
if (!messages.Any(x => x.ValidationLevel > message.ValidationLevel))
{
// remove messages with lower priority
foreach (var lowerPriorityMessage in messages.Where(x => x.ValidationLevel < message.ValidationLevel))
{
this.Remove(lowerPriorityMessage);
}
// insert message
base.Insert(Math.Min(this.Count, index), message);
}
}
else
{
base.Insert(index, message);
}
}
/// <summary>
/// Merges the specified messages.
/// </summary>
/// <param name="list">The validation message list.</param>
/// <returns>Merged message.</returns>
private static MergedValidationMessage Merge(ValidationMessageCollection list)
{
ValidationLevel validationLevel;
int validationPriortiy = int.MaxValue;
HashSet <string> messages = new HashSet <string>();
if (list == null ||
list.Count == 0)
{
validationLevel = ValidationLevel.None;
}
else if (list.Count == 1)
{
messages.Add(list[0].Message);
validationLevel = list[0].ValidationLevel;
}
else
{
validationLevel = ValidationLevel.None;
// find max validation level
foreach (ValidationMessage vm in list)
{
validationLevel = (int)vm.ValidationLevel > (int)validationLevel ? vm.ValidationLevel : validationLevel;
}
// find max validation priority
foreach (ValidationMessage vm in list.Where(x => x.ValidationLevel == validationLevel))
{
validationPriortiy = vm.ValidationPriority < validationPriortiy ? vm.ValidationPriority : validationPriortiy;
}
// select only messages for that level
foreach (ValidationMessage vm in list.Where(x => x.ValidationLevel == validationLevel &&
x.ValidationPriority == validationPriortiy))
{
if (!messages.Contains(vm.Message))
{
// prevent duplicates
messages.Add(vm.Message);
}
}
}
return(new MergedValidationMessage(validationLevel, messages));
}
