/// <summary>
/// Retrieves a <see cref="User"/> by it's ID.
/// </summary>
/// <param name="context">The <see cref="IMansionContext"/></param>
/// <param name="id">The ID of the <see cref="User"/>.</param>
/// <returns>Returns the loaded <see cref="User"/>.</returns>
public User RetrieveUser(IMansionContext context, Guid id)
{
// validate arguments
if (context == null)
throw new ArgumentNullException("context");
// create the user
var user = new User(id);
// get the repository
var repository = context.Repository;
// first, retrieve the user node
var userNode = RetrieveRoleOwnerNode(context, user, repository);
// second, retrieve the groups the user is in
var groupNodes = RetrieveUserGroupNodes(context, userNode, repository);
// assemble the role select criteria
var assignedRoleGuidsUser = userNode.Get(context, "assignedRoleGuids", string.Empty).Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries);
var assignedRoleGuidsGroups = groupNodes.Nodes.SelectMany(group => group.Get(context, "assignedRoleGuids", string.Empty).Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries));
var assignedRoleGuids = assignedRoleGuidsUser.Union(assignedRoleGuidsGroups).Distinct().ToList();
// retrieve the roles
var roleNodes = RetrieveRoleNodes(context, assignedRoleGuids, repository);
// turn the roles nodes into roles
foreach (var roleNode in roleNodes.Nodes)
user.Add(MapRole(context, roleNode));
// return the user
return user;
}
