Add the inviter to JoinRoomScreen when it's an invite. (#3093)

* Add inviter property to RoomProxyProtocol.

* Extract the room cell inviter label into it's own view.

* Use the new RoomInviterLabel in the JoinRoomScreen.

* Fix bug with invite to a public room.

ElementX/Sources/Mocks/Generated/GeneratedMocks.swift

@@ -8273,6 +8273,23 @@ class RoomProxyMock: RoomProxyProtocol {
         set(value) { underlyingMembership = value }
     }
     var underlyingMembership: Membership!
+    var inviterCallsCount = 0
+    var inviterCalled: Bool {
+        return inviterCallsCount > 0
+    }
+
+    var inviter: RoomMemberProxyProtocol? {
+        get async {
+            inviterCallsCount += 1
+            if let inviterClosure = inviterClosure {
+                return await inviterClosure()
+            } else {
+                return underlyingInviter
+            }
+        }
+    }
+    var underlyingInviter: RoomMemberProxyProtocol?
+    var inviterClosure: (() async -> RoomMemberProxyProtocol?)?
     var hasOngoingCall: Bool {
         get { return underlyingHasOngoingCall }
         set(value) { underlyingHasOngoingCall = value }

ElementX/Sources/Mocks/RoomMemberProxyMock.swift

@@ -97,6 +97,11 @@ extension RoomMemberProxyMock {
                                         membership: .join))
     }
     
+    static var mockNoName: RoomMemberProxyMock {
+        RoomMemberProxyMock(with: .init(userID: "@anonymous:matrix.org",
+                                        membership: .join))
+    }
+    
     static var mockInvited: RoomMemberProxyMock {
         RoomMemberProxyMock(with: .init(userID: "@invited:matrix.org",
                                         displayName: "Invited",

ElementX/Sources/Mocks/RoomProxyMock.swift

@@ -35,6 +35,7 @@ struct RoomProxyMockConfiguration {
     
     var members: [RoomMemberProxyMock] = .allMembers
     var ownUserID = RoomMemberProxyMock.mockMe.userID
+    var inviter: RoomMemberProxyProtocol?
     
     var canUserInvite = true
     var canUserTriggerRoomNotification = false
@@ -85,6 +86,7 @@ extension RoomProxyMock {
 
         ownUserID = configuration.ownUserID
         membership = .joined
+        inviterClosure = { configuration.inviter }
         
         membersPublisher = CurrentValueSubject(configuration.members).asCurrentValuePublisher()
         typingMembersPublisher = CurrentValueSubject([]).asCurrentValuePublisher()