/// <summary>
/// See <seealso cref="StatePropertyAttribute.Enabled"/>
/// </summary>
/// <returns>
/// true if <see cref="StatePropertyAttribute.Enabled"/> is set to true for this node.
/// false if <see cref="StatePropertyAttribute.Enabled"/> is set to false (or unspecified) for this node.
/// </returns>
public bool IsEnabled()
{
StatePropertyAttribute spa = this.GetStatePropertyAttribute();
if (spa == null)
{
return(false);
}
return(spa.Enabled == true);
}
public void DisablePresentation()
{
// TODO: Write unit test
// TODO: Create the SPA (with Enabled=false) if one is not defined, instead of throwing an exception
StatePropertyAttribute spa = GetStatePropertyAttribute();
// SPA is not defined, therefore do nothing since presentation is already disabled by default
if (spa is null)
{
return;
}
spa.Enabled = false;
}
/// <summary>
/// <para>Validator of the <see cref="StatePropertyAttribute"/> name value.</para>
/// <para>Valid if property is overridden and not defined as null/empty/whitespace.</para>
/// </summary>
/// <returns>
/// <para>true if valid</para>
/// <para>false if invalid</para>
/// </returns>
private bool IsValidStatePropertyName(StatePropertyAttribute statePropertyAttribute)
{
// Declaring StatePropertyAttribute is optional, so it's a valid name if one is not defined.
if (statePropertyAttribute is null)
{
return(true);
}
// If StatePropertyAttribute is declared as a Node attribute, but name is null, then the name is invalid.
if (statePropertyAttribute.Name is null)
{
return(false);
}
return(!string.IsNullOrWhiteSpace(statePropertyAttribute.Name));
}
public void EnablePresentation()
{
// TODO: Write unit test
// TODO: Create the SPA (with Enabled=true) if one is not defined, instead of throwing an exception
StatePropertyAttribute spa = null;
try
{
spa = GetStatePropertyAttribute(throwExceptionIfNotDefined: true);
}
catch (Exception e)
{
throw new Exception($"Cannot enable a node with no StatePropertyAttribute defined. {e.Message}");
}
if (!this.IsValidStatePropertyName(spa))
{
throw new Exception("Cannot enable a node with an invalid/no name StatePropertyAttribute property defined.");
}
spa.Enabled = true;
}
