/// <summary>
/// Gets the default processor for the given object type.
/// </summary>
/// <param name="objectType">Type of the object.</param>
/// <returns>
/// Returns the default processor for the given object type.
/// </returns>
public DittoProcessorAttribute GetDefaultProcessorFor(Type objectType)
{
if (Ditto.TryGetTypeAttribute(objectType, out DittoDefaultProcessorAttribute attr))
{
return(attr.ProcessorType.GetInstance <DittoProcessorAttribute>());
}
return(DefaultProcessorType.GetInstance <DittoProcessorAttribute>());
}
/// <summary>
/// Initializes a new instance of the <see cref="DittoProcessorAttribute"/> class.
/// </summary>
protected DittoProcessorAttribute()
{
if (Ditto.TryGetTypeAttribute(this.GetType(), out DittoProcessorMetaDataAttribute metaData, true) == false || metaData == null)
{
throw new ApplicationException($"The Ditto processor attribute ('{this.GetType()}') requires a DittoProcessorMetaData attribute to be applied to the class but none was found.");
}
this.ValueType = metaData.ValueType;
this.ContextType = metaData.ContextType;
}
/// <summary>
/// Processes the value.
/// </summary>
/// <returns>
/// The <see cref="object" /> representing the processed value.
/// </returns>
public override object ProcessValue()
{
var defaultValue = this.DefaultValue;
var recursive = this.Recursive;
var propName = this.Context.PropertyInfo != null ? this.Context.PropertyInfo.Name : string.Empty;
var altPropName = string.Empty;
// Check for Umbraco properties attribute on class
if (Ditto.TryGetTypeAttribute(this.Context.TargetType, out UmbracoPropertiesAttribute classAttr))
{
// Apply the prefix
if (string.IsNullOrWhiteSpace(classAttr.Prefix) == false)
{
altPropName = propName;
propName = classAttr.Prefix + propName;
}
// Apply global recursive setting
recursive |= classAttr.Recursive;
// Apply property source only if it's different from the default,
// and the current value is the default. We only do it this
// way because if they change it at the property level, we
// want that to take precedence over the class level.
if (classAttr.PropertySource != Ditto.DefaultPropertySource && PropertySource == Ditto.DefaultPropertySource)
{
PropertySource = classAttr.PropertySource;
}
}
var umbracoPropertyName = this.PropertyName ?? propName;
var altUmbracoPropertyName = this.AltPropertyName ?? altPropName;
var content = this.Value as IPublishedContent;
if (content == null)
{
return(defaultValue);
}
object propertyValue = null;
// Try fetching the value.
if (string.IsNullOrWhiteSpace(umbracoPropertyName) == false)
{
propertyValue = GetPropertyValue(content, umbracoPropertyName, recursive);
}
// Try fetching the alt value.
if ((propertyValue == null || (propertyValue is string tmp && string.IsNullOrWhiteSpace(tmp))) &&
string.IsNullOrWhiteSpace(altUmbracoPropertyName) == false)
{
propertyValue = GetPropertyValue(content, altUmbracoPropertyName, recursive);
}
// Try setting the default value.
if ((propertyValue == null || (propertyValue is string tmp2 && string.IsNullOrWhiteSpace(tmp2))) &&
defaultValue != null)
{
propertyValue = defaultValue;
}
return(propertyValue);
}