/// <summary>
/// Get attribute of a specific type.
/// </summary>
/// <typeparam name="TAttribute">The attribute <see cref="Type" />.</typeparam>
/// <param name="modelMetadata">The <see cref="ModelMetadata"/> instance.</param>
/// <returns>The attribute.</returns>
public static TAttribute GetAttribute <TAttribute>(this ModelMetadata modelMetadata) where TAttribute : Attribute
{
return(modelMetadata.GetAttributes <TAttribute>().FirstOrDefault());
}
/// <summary>
/// Get attribute of a specific type.
/// </summary>
/// <typeparam name="TAttribute">The attribute <see cref="Type" />.</typeparam>
/// <param name="modelMetadata">The <see cref="ModelMetadata"/> instance.</param>
/// <param name="predicate">A function to test an element for a condition.</param>
/// <returns>The attribute.</returns>
public static TAttribute GetAttribute <TAttribute>(this ModelMetadata modelMetadata, Func <TAttribute, bool> predicate) where TAttribute : Attribute
{
return(modelMetadata.GetAttributes <TAttribute>().FirstOrDefault(predicate));
}
private static void SetAttributes(Schema schema, ModelMetadata modelMetadata, string propertyName = null)
{
var attributes = propertyName == null
? modelMetadata.GetAttributes <Attribute>()
: modelMetadata.GetAttributes <Attribute>(propertyName);
if (attributes.Count == 0)
{
return;
}
if (string.IsNullOrEmpty(schema.Description))
{
schema.Description = attributes.OfType <DescriptionAttribute>().LastOrDefault()?.Description;
}
if (schema.Default == null)
{
schema.Default = attributes.OfType <DefaultValueAttribute>().LastOrDefault()?.Value;
}
if (string.IsNullOrEmpty(schema.Pattern))
{
schema.Pattern = attributes.OfType <RegularExpressionAttribute>().LastOrDefault()?.Pattern;
}
if (schema.Maximum == null && schema.Minimum == null)
{
var range = attributes.OfType <RangeAttribute>().LastOrDefault();
if (range != null)
{
if (Int32.TryParse(range.Maximum.ToString(), out int maximum))
{
schema.Maximum = maximum;
}
if (Int32.TryParse(range.Minimum.ToString(), out int minimum))
{
schema.Minimum = minimum;
}
}
}
if (schema.MinLength == null)
{
schema.MinLength = attributes.OfType <MinLengthAttribute>().LastOrDefault()?.Length;
}
if (schema.MaxLength == null)
{
schema.MaxLength = attributes.OfType <MaxLengthAttribute>().LastOrDefault()?.Length;
}
if (schema.MinLength == null && schema.MaxLength == null)
{
var stringLengthAttribute = attributes.OfType <StringLengthAttribute>().LastOrDefault();
if (stringLengthAttribute != null)
{
schema.MinLength = stringLengthAttribute.MinimumLength;
schema.MaxLength = stringLengthAttribute.MaximumLength;
}
}
if (string.IsNullOrEmpty(schema.Title))
{
schema.Title = attributes.OfType <DisplayNameAttribute>().LastOrDefault()?.DisplayName;
}
if (string.IsNullOrEmpty(schema.Format) && schema.Type == "string")
{
var dataTypeAttribute = attributes.OfType <DataTypeAttribute>().LastOrDefault();
if (dataTypeAttribute != null && DataTypeFormatMap.TryGetValue(dataTypeAttribute.DataType, out string format))
{
schema.Format = format;
}
}
}
