Add support for extended profile using SIWA token exchange (#322)

* Add support for extended profile using SIWA token exchange

* Fix indenting/whitespace

* Revert accidental Cartfile.resolved changes

* Reorder SIWA parameters, and stop sending missing values

* Expand test cases for SIWA

Author: asmclean

Auth0/Authentication.swift

@@ -911,21 +911,39 @@ public extension Authentication {
     ```
     Auth0
        .authentication(clientId: clientId, domain: "samples.auth0.com")
-       .tokenExchange(withAppleAuthorizationCode: authCode, scope: "openid profile offline_access", audience: "https://myapi.com/api)
+       .tokenExchange(withAppleAuthorizationCode: authCode, scope: "openid profile offline_access", audience: "https://myapi.com/api, fullName: credentials.fullName)
        .start { print($0) }
     ```
 
     - parameter authCode: Authorization Code retrieved from Apple Authorization
     - parameter scope: requested scope value when authenticating the user. By default is 'openid profile offline_access'
     - parameter audience: API Identifier that the client is requesting access to
+    - parameter fullName: The full name property returned with the Apple ID Credentials
 
     - returns: a request that will yield Auth0 user's credentials
     */
-    func tokenExchange(withAppleAuthorizationCode authCode: String, scope: String? = nil, audience: String? = nil) -> Request<Credentials, AuthenticationError> {
-        var parameters = [ "grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
-                       "subject_token": authCode,
-                       "subject_token_type": "http://auth0.com/oauth/token-type/apple-authz-code",
-                       "scope": scope ?? "openid profile offline_access"]
+    func tokenExchange(withAppleAuthorizationCode authCode: String, scope: String? = nil, audience: String? = nil, fullName: PersonNameComponents? = nil) -> Request<Credentials, AuthenticationError> {
+        var parameters: [String: String] =
+            [ "grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
+              "subject_token": authCode,
+              "subject_token_type": "http://auth0.com/oauth/token-type/apple-authz-code",
+              "scope": scope ?? "openid profile offline_access" ]
+        if let fullName = fullName {
+            let name = [
+                "firstName": fullName.givenName,
+                "lastName": fullName.familyName
+            ].filter { $0.value != nil }.mapValues { $0! }
+            if !name.isEmpty, let jsonData = try? String(
+                    data: JSONSerialization.data(
+                        withJSONObject: [
+                            "name": name
+                        ],
+                        options: []),
+                    encoding: String.Encoding.utf8
+            ) {
+                parameters["user_profile"] = jsonData
+            }
+        }
         parameters["audience"] = audience
         return self.tokenExchange(withParameters: parameters)
     }

Auth0Tests/AuthenticationSpec.swift

@@ -242,6 +242,28 @@ class AuthenticationSpec: QuickSpec {
                 "scope": "openid email",
                 "audience": "https://myapi.com/api"
                 ])) { _ in return authResponse(accessToken: AccessToken, idToken: IdToken) }.name = "Token Exchange Apple Success with custom scope and audience"
+                
+                stub(condition: isToken(Domain) && hasAtLeast([
+                "grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
+                "subject_token": "VALIDNAMECODE",
+                "subject_token_type": "http://auth0.com/oauth/token-type/apple-authz-code"]) &&
+                (hasAtLeast(["user_profile": "{\"name\":{\"lastName\":\"Smith\",\"firstName\":\"John\"}}" ]) || hasAtLeast(["user_profile": "{\"name\":{\"firstName\":\"John\",\"lastName\":\"Smith\"}}" ]))
+                ) { _ in return authResponse(accessToken: AccessToken, idToken: IdToken) }.name = "Token Exchange Apple Success with user profile"
+                
+                stub(condition: isToken(Domain) && hasAtLeast([
+                "grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
+                "subject_token": "VALIDPARTIALNAMECODE",
+                "subject_token_type": "http://auth0.com/oauth/token-type/apple-authz-code",
+                "user_profile": "{\"name\":{\"firstName\":\"John\"}}"
+                ])) { _ in return authResponse(accessToken: AccessToken, idToken: IdToken) }.name = "Token Exchange Apple Success with partial user profile"
+                
+                stub(condition: isToken(Domain) && hasAtLeast([
+                "grant_type": "urn:ietf:params:oauth:grant-type:token-exchange",
+                "subject_token": "VALIDMISSINGNAMECODE",
+                "subject_token_type": "http://auth0.com/oauth/token-type/apple-authz-code"]) &&
+                hasNoneOf(["user_profile"])
+                ) { _ in return authResponse(accessToken: AccessToken, idToken: IdToken) }.name = "Token Exchange Apple Success with missing user profile"
+                
             }
 
             it("should exchange apple auth code for credentials") {
@@ -284,8 +306,56 @@ class AuthenticationSpec: QuickSpec {
                 }
             }
 
-        }
+            it("should exchange apple auth code for credentials with fullName") {
+                var fullName = PersonNameComponents()
+                fullName.givenName = "John"
+                fullName.familyName = "Smith"
+                fullName.middleName = "Ignored"
 
+                waitUntil(timeout: Timeout) { done in
+                    auth.tokenExchange(withAppleAuthorizationCode: "VALIDNAMECODE",
+                                       fullName: fullName)
+                        .start { result in
+                            expect(result).to(haveCredentials())
+                            done()
+                    }
+                }
+            }
+            
+            it("should exchange apple auth code for credentials with partial fullName") {
+                var fullName = PersonNameComponents()
+                fullName.givenName = "John"
+                fullName.familyName = nil
+                fullName.middleName = "Ignored"
+                
+                waitUntil(timeout: Timeout) { done in
+                    auth.tokenExchange(withAppleAuthorizationCode: "VALIDPARTIALNAMECODE",
+                                       fullName: fullName)
+                        .start { result in
+                            expect(result).to(haveCredentials())
+                            done()
+                    }
+                }
+            }
+            
+            it("should exchange apple auth code for credentials with missing fullName") {
+                var fullName = PersonNameComponents()
+                fullName.givenName = nil
+                fullName.familyName = nil
+                fullName.middleName = nil
+                
+                waitUntil(timeout: Timeout) { done in
+                    auth.tokenExchange(withAppleAuthorizationCode: "VALIDMISSINGNAMECODE",
+                                       fullName: fullName)
+                        .start { result in
+                            expect(result).to(haveCredentials())
+                            done()
+                    }
+                }
+            }
+            
+        }
+        
         describe("revoke refresh token") {
 
             let refreshToken = UUID().uuidString.replacingOccurrences(of: "-", with: "")