access(all) contract CupcakeFriendsV1 { pub let CollectionStoragePath: StoragePath pub let CollectionPublicPath: PublicPath pub let CollectionPrivatePath: PrivatePath pub let MinterStoragePath: StoragePath pub resource Cupcake : FriendlyCupcake,NotYetKnownCupcake,MyCupcake { priv let id : Int; priv var accessoryId : Int?; priv let friendships : @{Int : CupcakeFriendShip}; priv let openFriendshipRequests : @{Int: CupcakeFriendshipRequestHolder}; priv let requestedFriendships : [Int]; init(id: Int) { self.id = id; self.accessoryId = nil; self.friendships <- {} self.openFriendshipRequests <- {}; self.requestedFriendships = []; } pub fun getId() : Int { return self.id; } pub fun accept(request : @CupcakeFriendshipRequest, time : UInt64) { if(self.id != request.getRequestedAcceptorId()) { panic("Cannot accept friendships for another Cupcake"); } if(self.friendships[request.getRequestorId()] != nil) { panic("I am already friends with this Cupcake"); } self.friendships[request.getRequestorId()] <-! create CupcakeFriendShip(requestorId: request.getRequestorId(), acceptorId: self.id, creationTime: time, requestorCupcake: request.getRequestorCupcake()); destroy request; } pub fun removeRequestedFriendship(otherCupcakeId : Int) { let index = self.requestedFriendships.firstIndex(of: otherCupcakeId) if(index != nil) { self.requestedFriendships.remove(at: index!); } } pub fun storeRequestedFriendship(otherCupcakeId : Int) { self.requestedFriendships.append(otherCupcakeId); } pub fun createFriendshipRequest(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,otherCupcakeId : Int, time : UInt64) : @CupcakeFriendshipRequest { return <- create CupcakeFriendshipRequest(requestorId: self.id, requestedAcceptorId: otherCupcakeId, creationTime: time, requestorCupcake: myCupcake); } pub fun acceptBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time : UInt64) { let holder <- self.openFriendshipRequests.remove(key: friendCupcake) ?? panic("No friend request from this Cupcake") let request <- holder.getRequest() let acceptor <- holder.getAcceptor() acceptor.accept(request: <-self.createFriendshipRequest(myCupcake: myCupcake, otherCupcakeId: request.getRequestorId(),time: time), time: time) self.accept(request: <- request, time: time) destroy acceptor destroy holder; } pub fun denyBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time: UInt64) { let holder <- self.openFriendshipRequests.remove(key: friendCupcake) ?? panic("No friend request from this Cupcake") let request <- holder.getRequest() let acceptor <- holder.getAcceptor() acceptor.deny(request: <-self.createFriendshipRequest(myCupcake: myCupcake, otherCupcakeId: request.getRequestorId(), time: time)) destroy acceptor; destroy request; destroy holder; } pub fun getOpenRequests() : &{Int: CupcakeFriendshipRequestHolder} { return &self.openFriendshipRequests as &{Int: CupcakeFriendshipRequestHolder} } pub fun depositFriendshipRequest(request: @CupcakeFriendshipRequestHolder) { self.openFriendshipRequests[request.getId()] <-! request; } pub fun getFriendRequests() : [CupcakeState] { let requestStates : [CupcakeState] = []; for key in self.openFriendshipRequests.keys { let requestRef = &self.openFriendshipRequests[key] as &CupcakeFriendshipRequestHolder? let otherRequest = requestRef!.getRequestRef().getRequestorCupcake().borrow() ?? panic("Could not borrow other cupcake"); let request = requestRef!.getRequestRef(); requestStates.append(CupcakeState(id: otherRequest.getId(), accessoryId: otherRequest.getAccessory(), time: request.getCreationTime())); } return requestStates; } pub fun getRequestedFriendships() : [Int] { return self.requestedFriendships; } pub fun getFriends() : [CupcakeState] { let requestStates : [CupcakeState] = []; for key in self.friendships.keys { let requestRef = &self.friendships[key] as &CupcakeFriendShip? let otherRequest = requestRef!.getRequestorCupcake().borrow() ?? panic("Could not borrow other cupcake"); let creationTime = requestRef!.getCreationTime(); requestStates.append(CupcakeState(id: otherRequest.getId(), accessoryId: otherRequest.getAccessory(), time: creationTime)); } return requestStates; } pub fun hasFriendOrRequest(id : Int) : Bool { if(self.friendships[id] != nil) { return true; } if(self.openFriendshipRequests[id] != nil) { return true; } if(self.requestedFriendships.firstIndex(of: id) != nil) { return true; } return false; } pub fun setAccessory(id : Int) { self.accessoryId = id; } pub fun getAccessory() : Int? { return self.accessoryId } destroy() { destroy self.friendships; destroy self.openFriendshipRequests; } } pub struct CupcakeState { pub let id : Int; pub let accessoryId : Int?; pub let time : UInt64?; init(id : Int, accessoryId : Int?, time : UInt64?) { self.id = id; self.accessoryId = accessoryId; self.time = time; } } pub resource interface FriendlyCupcake { pub fun accept(request : @CupcakeFriendshipRequest, time: UInt64); pub fun removeRequestedFriendship(otherCupcakeId : Int); } pub resource interface MyCupcake { pub fun createFriendshipRequest(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,otherCupcakeId : Int, time: UInt64) : @CupcakeFriendshipRequest; pub fun acceptBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time: UInt64); pub fun denyBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time: UInt64); pub fun storeRequestedFriendship(otherCupcakeId : Int); pub fun setAccessory(id : Int); pub fun hasFriendOrRequest(id : Int) : Bool; pub fun getId() : Int; } pub resource interface NotYetKnownCupcake { pub fun depositFriendshipRequest(request: @CupcakeFriendshipRequestHolder); pub fun getId() : Int; pub fun getFriendRequests() : [CupcakeState]; pub fun getFriends() : [CupcakeState]; pub fun getRequestedFriendships() : [Int]; pub fun getAccessory() : Int?; } pub resource CupcakeFriendshipRequestHolder { priv let request : @{Int:CupcakeFriendshipRequest}; priv let acceptor : @{Int: CupcakeFriendshipAcceptor}; init(request : @CupcakeFriendshipRequest, acceptor : @CupcakeFriendshipAcceptor) { self.request <- {0: <-request}; self.acceptor <- {0: <-acceptor}; } pub fun getRequest() : @CupcakeFriendshipRequest { return <- self.request.remove(key: 0)!; } pub fun getRequestRef() : &CupcakeFriendshipRequest { let requestRef = &self.request[0] as &CupcakeFriendshipRequest?; return requestRef!; } pub fun getAcceptor() : @CupcakeFriendshipAcceptor { return <- self.acceptor.remove(key: 0)!; } pub fun getId() : Int { let ref = &self.request[0] as &CupcakeFriendshipRequest?; return ref!.getRequestorId(); } destroy () { destroy self.request; destroy self.acceptor; } } pub resource CupcakeMinter { priv let usedIds : [Int]; init() { self.usedIds = []; } pub fun mint(id : Int) : @Cupcake { if(self.usedIds.contains(id)) { panic("ID has already been minted"); } self.usedIds.append(id); return <- create Cupcake(id: id); } } pub resource CupcakeFriendShip { priv let requestorId : Int; priv let acceptorId : Int; priv let creationTime : UInt64; priv let requestorCupcake: Capability<&AnyResource{NotYetKnownCupcake}>; init(requestorId : Int, acceptorId : Int, creationTime : UInt64, requestorCupcake : Capability<&AnyResource{NotYetKnownCupcake}>) { self.requestorId = requestorId; self.acceptorId = acceptorId; self.requestorCupcake = requestorCupcake; self.creationTime = creationTime; } pub fun getRequestorId() : Int { return self.requestorId; } pub fun getAcceptorId() : Int { return self.acceptorId; } pub fun getCreationTime() : UInt64 { return self.creationTime; } pub fun getRequestorCupcake() : Capability<&AnyResource{NotYetKnownCupcake}> { return self.requestorCupcake; } } pub resource CupcakeFriendshipRequest { priv let requestorId : Int; priv let requestedAcceptorId : Int; priv let creationTime : UInt64; priv let requestorCupcake: Capability<&AnyResource{NotYetKnownCupcake}>; init(requestorId : Int, requestedAcceptorId : Int, creationTime : UInt64, requestorCupcake : Capability<&AnyResource{NotYetKnownCupcake}>) { self.requestorId = requestorId; self.requestedAcceptorId = requestedAcceptorId; self.requestorCupcake = requestorCupcake; self.creationTime = creationTime; } pub fun getRequestorId() : Int { return self.requestorId; } pub fun getRequestedAcceptorId() : Int { return self.requestedAcceptorId; } pub fun getRequestorCupcake() : Capability<&AnyResource{NotYetKnownCupcake}> { return self.requestorCupcake; } pub fun getCreationTime() : UInt64 { return self.creationTime; } } pub resource CupcakeFriendshipAcceptor { priv let requestorId : Int; priv let cupcake : Capability<&AnyResource{FriendlyCupcake}>; init(requestorId : Int, cupcake : Capability<&AnyResource{FriendlyCupcake}>) { self.requestorId = requestorId; self.cupcake = cupcake; } pub fun accept(request: @CupcakeFriendshipRequest, time : UInt64) { if(request.getRequestorId() != self.requestorId) { panic("I cannot accept friendship requests from you"); } let cupcake = self.cupcake.borrow() ?? panic("Cannot borrow Cupcake") cupcake.accept(request: <- request, time: time) cupcake.removeRequestedFriendship(otherCupcakeId: self.requestorId); } pub fun deny(request: @CupcakeFriendshipRequest) { if(request.getRequestorId() != self.requestorId) { panic("I cannot deny friendship requests from you"); } let cupcake = self.cupcake.borrow() ?? panic("Cannot borrow Cupcake"); cupcake.removeRequestedFriendship(otherCupcakeId: self.requestorId); destroy request; } } pub resource CupcakeCollection : CupcakeReceiver, FriendlyCupcake, NotYetKnownCupcake, MyCupcake{ priv let ownedCupcakes: @{UInt64: Cupcake}; init() { self.ownedCupcakes <- {} } pub fun depositCupcake(cupcake : @Cupcake) { if(self.hasCupcake()) { panic("Cannot own more than one Cupcake"); } self.ownedCupcakes[0] <-! cupcake; } pub fun getCupcake() : &Cupcake { if(!self.hasCupcake()) { panic("Do not have a Cupcake yet"); } return (&self.ownedCupcakes[0] as &Cupcake?)!; } pub fun hasCupcake() : Bool { return self.ownedCupcakes.length != 0; } pub fun accept(request : @CupcakeFriendshipRequest, time: UInt64) { self.getCupcake().accept(request: <- request, time: time) } pub fun removeRequestedFriendship(otherCupcakeId : Int) { self.getCupcake().removeRequestedFriendship(otherCupcakeId: otherCupcakeId); } pub fun storeRequestedFriendship(otherCupcakeId : Int) { self.getCupcake().storeRequestedFriendship(otherCupcakeId: otherCupcakeId); } pub fun createFriendshipRequest(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,otherCupcakeId : Int, time: UInt64) : @CupcakeFriendshipRequest { return <- self.getCupcake().createFriendshipRequest(myCupcake: myCupcake, otherCupcakeId: otherCupcakeId, time: time); } pub fun depositFriendshipRequest(request: @CupcakeFriendshipRequestHolder) { self.getCupcake().depositFriendshipRequest(request: <-request); } pub fun getId() : Int { return self.getCupcake().getId(); } pub fun getFriendRequests() : [CupcakeState] { return self.getCupcake().getFriendRequests(); } pub fun getFriends() : [CupcakeState] { return self.getCupcake().getFriends(); } pub fun acceptBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time: UInt64) { self.getCupcake().acceptBothSides(myCupcake: myCupcake, friendCupcake: friendCupcake, time: time); } pub fun denyBothSides(myCupcake : Capability<&AnyResource{NotYetKnownCupcake}>,friendCupcake : Int, time: UInt64) { self.getCupcake().denyBothSides(myCupcake: myCupcake, friendCupcake: friendCupcake, time: time); } pub fun getRequestedFriendships() : [Int] { return self.getCupcake().getRequestedFriendships(); } pub fun getAccessory() : Int? { return self.getCupcake().getAccessory(); } pub fun setAccessory(id : Int) { self.getCupcake().setAccessory(id: id) } pub fun hasFriendOrRequest(id : Int) : Bool { return self.getCupcake().hasFriendOrRequest(id: id) } destroy() { destroy self.ownedCupcakes; } } pub resource interface CupcakeReceiver { pub fun depositCupcake(cupcake : @Cupcake); } pub fun createEmptyCollection() : @CupcakeCollection { return <- create CupcakeCollection(); } pub fun requestFriendship(myCupcakeRef : Capability<&AnyResource{MyCupcake}>,notYetKnownMyCupcakeRef: Capability<&AnyResource{NotYetKnownCupcake}>,friendlyCupcakeRef : Capability<&AnyResource{FriendlyCupcake}>,otherCupcakeRef : Capability<&AnyResource{NotYetKnownCupcake}>, time: UInt64) { let myCupcake = myCupcakeRef.borrow() ?? panic("Cannot borrow my Cupcake") let otherCupcake = otherCupcakeRef.borrow() ?? panic("Cannot borrow other Cupcake"); if(myCupcake.hasFriendOrRequest(id: otherCupcake.getId())) { panic("I am already friends with this cupcake, it has requested to be friends with me, or i requested to be friends with it"); } if(myCupcake.getId() == otherCupcake.getId()) { panic("I cannot be friends with myself"); } let request <- myCupcake.createFriendshipRequest(myCupcake: notYetKnownMyCupcakeRef, otherCupcakeId: otherCupcake.getId(), time: time); let acceptor <- create CupcakeFriendshipAcceptor(requestorId: otherCupcake.getId(), cupcake: friendlyCupcakeRef); let holder <- create CupcakeFriendshipRequestHolder(request: <-request, acceptor: <-acceptor); myCupcake.storeRequestedFriendship(otherCupcakeId: otherCupcake.getId()); otherCupcake.depositFriendshipRequest(request: <-holder) } pub fun setupCollection(account : AuthAccount) { account.save( <- self.createEmptyCollection(), to: self.CollectionStoragePath) account.link<&{CupcakeReceiver,NotYetKnownCupcake}>(self.CollectionPublicPath, target: self.CollectionStoragePath) account.link<&{FriendlyCupcake,MyCupcake}>(self.CollectionPrivatePath, target: self.CollectionStoragePath) } init() { self.CollectionStoragePath = /storage/barcampCupcakeCollectionV1 self.CollectionPrivatePath = /private/barcampCupcakeCollectionV1 self.CollectionPublicPath = /public/barcampCupcakeCollectionV1 self.MinterStoragePath = /storage/barcampCupcakeMinterV1 self.setupCollection(account: self.account); self.account.save(<-create CupcakeMinter(), to: self.MinterStoragePath) } }

Contract

Contract