/// <summary>
/// Ensures that the user is authorized to read a single element and filters out any unauthorized content within the element.
/// </summary>
/// <typeparam name="T">The type of the content to be searched.</typeparam>
/// <param name="content">The content being searched.</param>
/// <param name="readAuthorizeObject">Executes read authorization methods against this type of object.</param>
/// <param name="context">The Microsoft.AspNetCore.Mvc.Filters.ActionExecutedContext.</param>
public static void Filter <T>(T content, IReadAuthorize <T> readAuthorizeObject, ActionExecutedContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (readAuthorizeObject == null)
{
throw new ArgumentNullException(nameof(readAuthorizeObject));
}
if (!readAuthorizeObject.CanRead(content))
{
context.Result = new UnauthorizedResult();
return;
}
readAuthorizeObject.FilterUnauthorizedContent(content);
}
/// <summary>
/// Filters out any unauthorized content within the collection of elements.
/// </summary>
/// <typeparam name="T">The type of content to be searched.</typeparam>
/// <param name="objects">The content collection being searched.</param>
/// <param name="readAuthorizeObject">Executes read authorization methods against this type of object.</param>
/// <param name="contextResult">The context result object that contains the content collection value to be filtered.</param>
public static void FilterMany <T>(IEnumerable <T> objects, IReadAuthorize <T> readAuthorizeObject, ObjectResult contextResult)
{
if (contextResult == null)
{
throw new ArgumentNullException(nameof(contextResult));
}
if (readAuthorizeObject == null)
{
throw new ArgumentNullException(nameof(readAuthorizeObject));
}
var filteredObjects = objects.Where(readAuthorizeObject.CanRead).ToList();
foreach (var @object in filteredObjects)
{
readAuthorizeObject.FilterUnauthorizedContent(@object);
}
contextResult.Value = filteredObjects;
}
/// <summary>
/// Initializes a new instance of the <see cref="ReadAuthorizeEvent"/> class.
/// </summary>
/// <param name="userAccessor">An instance of IUserAccessor to identify user access.</param>
/// <param name="readAuthorizeMember">An instance of IReadAuthorize to perform deeper authorization against members being viewed within this event.</param>
public ReadAuthorizeEvent(IUserAccessor userAccessor, IReadAuthorize <TMember> readAuthorizeMember)
{
UserAccessor = userAccessor;
ReadAuthorizeMember = readAuthorizeMember;
}