//LoginModule is used to retrieve some authorization roles of login module and add them to book store role(s)
public BooksAuthorization(BooksEntityApp app)
{
_app = app;
var loginRoles = app.GetModule <LoginModule>().Roles;
// Data filters
// 'userid' value will be automatically injected by runtime when evaluating lambdas
var userDataFilter = new AuthorizationFilter("UserData");
userDataFilter.Add <IUser, Guid>((u, userId) => u.Id == userId);
userDataFilter.Add <IBookOrder, Guid>((bo, userId) => bo.User.Id == userId);
userDataFilter.Add <IBookOrderLine, Guid>((ol, userId) => ol.Order.User.Id == userId);
userDataFilter.Add <IBookReview, Guid>((r, userId) => r.User.Id == userId);
// Author data filter.
var authorDataFilter = new AuthorizationFilter("AuthorData");
// Simple case. IAuthor record is matched by filter if IAuthor.User.Id == Current-user-Id
// Note that IAuthor.User might be null - but it's OK to use 'a.User.Id' - the lambda is rewritten
// with extra safe conditionals to allow these expressions
authorDataFilter.Add <IAuthor, Guid>((a, userId) => a.User.Id == userId);
// More complex case. We provide an expression that checks if userId matches Id of any author of a book.
// Option 1 - checking book.Authors list, this requires loading list of ALL authors
// authorDataFilter.Add<IBook, Guid>((b, userId) => (b.Authors.Any(a => a.User.Id == userId)));
// Option 2 - Making LINQ query, using Exists<> helper method, it loads a single record
authorDataFilter.Add <IBook, OperationContext, Guid>((b, ctx, userId) => ctx.Exists <IBookAuthor>(
ba => ba.Author.User.Id == userId && ba.Book.Id == b.Id));
// BookOrder filter for adjusting order by StoreManager
var adjustOrderFilter = new AuthorizationFilter("OrderToAdjust");
adjustOrderFilter.Add <IBookOrder, Guid>((bo, adjustedOrderId) => bo.Id == adjustedOrderId);
adjustOrderFilter.Add <IBookOrderLine, Guid>((line, adjustedOrderId) => line.Order.Id == adjustedOrderId);
// Customer/users data filter. CustomerSupport role allows access only to users who are Customers or Authors (not employees)
// Here we demo use of data filter expression for pre-filtering users in queries.
// When customer support person queries users, the filter 'u.Type==UserType.Customer' will be automatically injected into the LINQ query
// We also add another filter for authors - the final filter will be OR of both
var custSupportUserFilter = new AuthorizationFilter("CustomerSupportUsers");
custSupportUserFilter.Add <IUser>(u => u.Type == UserType.Customer, FilterUse.Entities | FilterUse.Query);
// just for testing filter combinations, we add another filter for users that are authors.
// both filters will be combined (using OR), and whenever customer support person queries users, he will get only Customer and Author users
var custSupportAuthorUserFilter = new AuthorizationFilter("CustomerSupportAuthorUsers");
custSupportAuthorUserFilter.Add <IUser>(u => u.Type == UserType.Author, FilterUse.All);
//Entity resources
var books = new EntityGroupResource("Books", typeof(IBook), typeof(IBookAuthor), typeof(IAuthor), typeof(IImage));
var publishers = new EntityGroupResource("Publishers", typeof(IPublisher));
var orders = new EntityGroupResource("Orders", typeof(IBookOrder), typeof(IBookOrderLine));
var reviews = new EntityGroupResource("BookReviews", typeof(IBookReview));
var users = new EntityGroupResource("Users", typeof(IUser));
var authorEditData = new EntityGroupResource("AuthorEditData");
authorEditData.Add(typeof(IAuthor), "Bio");
authorEditData.Add <IBook>(b => b.Description, b => b.Abstract);
//authorEditData.Add(typeof(IBook), "Description,Abstract"); //-- alternative way
var coupons = new EntityGroupResource("Coupons", typeof(ICoupon));
var couponAppliedOn = new EntityGroupResource("CouponAppliedOn");
couponAppliedOn.Add <ICoupon>(c => c.AppliedOn);
//Permissions
var browseBooks = new EntityGroupPermission("BrowseBooks", AccessType.Read, books, publishers);
var createOrders = new EntityGroupPermission("CreateOrders", AccessType.CRUD, orders);
var viewOrders = new EntityGroupPermission("ViewOrders", AccessType.Read, orders);
var browseReviews = new EntityGroupPermission("BrowseReviews", AccessType.Read, reviews);
var writeReviews = new EntityGroupPermission("WriteReviews", AccessType.CRUD, reviews);
var editBooks = new EntityGroupPermission("EditBooks", AccessType.CRUD, books);
var deleteReviews = new EntityGroupPermission("DeleteReviews", AccessType.Read | AccessType.Delete, reviews);
var editPublishers = new EntityGroupPermission("EditPublishers", AccessType.CRUD, publishers);
var editByAuthor = new EntityGroupPermission("EditByAuthor", AccessType.Update, authorEditData);
var editUsers = new EntityGroupPermission("EditUsers", AccessType.CRUD, users);
var viewUsers = new EntityGroupPermission("ViewUsers", AccessType.Read, users);
var adjustOrder = new EntityGroupPermission("AdjustOrder", AccessType.Read | AccessType.Update | AccessType.Delete, orders);
// We grant Peek permission here for Coupons. The app code can find a coupon by code, but user cannot see it
// (no READ permission) or see any coupons. User receives coupon in email, and uses it when buying a book.
// System looks up the coupon code and applies the discount. But user cannot never see any coupons in the system.
var lookupCoupon = new EntityGroupPermission("LookupCoupon", AccessType.Peek, coupons);
//permission to update ICoupon.AppliedOn property - we set it when user uses coupon
var useCoupon = new EntityGroupPermission("UseCoupon", AccessType.UpdateStrict, couponAppliedOn);
var manageCoupons = new EntityGroupPermission("ManageCoupons", AccessType.CRUD, coupons);
//Activities
var browsing = new Activity("Browsing", browseBooks, browseReviews);
var shopping = new Activity("Shopping", createOrders, lookupCoupon, useCoupon);
var writingReviews = new Activity("Reviewing", writeReviews);
var editingUserInfo = new Activity("EditingUserInfo", editUsers);
var viewingUserInfo = new Activity("ViewingUserInfo", editUsers);
var viewingOrders = new Activity("ViewingOrders", viewOrders, lookupCoupon);
var bookEditing = new Activity("BookEditing", editBooks);
var editingByAuthor = new Activity("EditingByAuthor", editByAuthor);
var managingStore = new Activity("ManagingStore", editPublishers, manageCoupons);
var moderatingReviews = new Activity("ModeratingReviews", deleteReviews);
var adjustingOrders = new Activity("AdjustingOrders", adjustOrder);
// Controller permissions
CallUserAccountController = new ObjectAccessPermission("CallUserAccountController", AccessType.ApiAll,
typeof(Vita.Samples.BookStore.Api.UserAccountController));
//Roles
//Browse books and reviews;
AnonymousUser = new Role("AnonymousUser", browsing);
// Customer - view/edit orders only for current user; edit reviews only created by current user
Customer = new Role("Customer");
Customer.AddChildRoles(AnonymousUser, loginRoles.SelfServiceEditor);
Customer.Grant(CallUserAccountController);
Customer.Grant(userDataFilter, shopping, writingReviews, editingUserInfo);
BookEditor = new Role("BookEditor", browsing, bookEditing);
Author = new Role("Author");
Author.ChildRoles.Add(Customer); //author can act as a customer and buy a book
//We save the grant in static field, to explicitly enable the activity at runtime for limited scope
AuthorEditGrant = Author.GrantDynamic(authorDataFilter, editingByAuthor);
//Customer support can view orders and users (only users that are customers!)
CustomerSupport = new Role("CustomerSupport", viewingOrders);
CustomerSupport.Grant(custSupportUserFilter, viewingUserInfo);
CustomerSupport.Grant(custSupportAuthorUserFilter, viewingUserInfo);
//Store manager
StoreManager = new Role("StoreManager", browsing, managingStore, moderatingReviews);
// Store manager is able to adjust orders, but only in the context of dynamic (explicitly started) activity
// When adjusting activity starts, it saves order Id in user context under AdjustedOrderIdKey.
// All records being edited are then verified against this order Id.
// This garantees that during adjustment editing we modify only data for the order that we started adjustment for.
ManagerAdjustOrderGrant = StoreManager.GrantDynamic(adjustOrderFilter, adjustingOrders, AdjustedOrderIdKey);
//Add permission to access LoginAdministration functions, calendar entities
StoreManager.AddChildRoles(loginRoles.LoginAdministrator);
StoreManager.ChildRoles.Add(Vita.Modules.Logging.LoggingAuthorizationRoles.Instance.LogDataViewerRole);
}