Only show Introduction Accept Information if success is still possible

briar-android/src/main/java/org/briarproject/briar/android/contact/ConversationItem.java

@@ -124,9 +124,11 @@ abstract class ConversationItem {
 				text = ctx.getString(
 						R.string.introduction_response_accepted_sent,
 						ir.getName());
-				text += "\n\n" + ctx.getString(
+				if (ir.isSuccessPossible()) {
-						R.string.introduction_response_accepted_sent_info,
+					text += "\n\n" + ctx.getString(
-						ir.getName());
+							R.string.introduction_response_accepted_sent_info,
+							ir.getName());
+				}
 			} else {
 				text = ctx.getString(
 						R.string.introduction_response_declined_sent,

briar-api/src/main/java/org/briarproject/briar/api/introduction/IntroductionRequest.java

@@ -22,7 +22,7 @@ public class IntroductionRequest extends IntroductionResponse {
 			@Nullable String message, boolean answered, boolean exists) {
 
 		super(sessionId, messageId, groupId, role, time, local, sent, seen,
-				read, name, accepted);
+				read, name, accepted, false);
 
 		this.message = message;
 		this.answered = answered;
@@ -41,4 +41,11 @@ public class IntroductionRequest extends IntroductionResponse {
 	public boolean contactExists() {
 		return exists;
 	}
+
+	@Override
+	public boolean isSuccessPossible() {
+		// TODO fix this IntroductionMessage mess
+		throw new AssertionError();
+	}
+
 }

briar-api/src/main/java/org/briarproject/briar/api/introduction/IntroductionResponse.java

@@ -12,16 +12,18 @@ import javax.annotation.concurrent.Immutable;
 public class IntroductionResponse extends IntroductionMessage {
 
 	private final String name;
-	private final boolean accepted;
+	private final boolean accepted, successPossible;
 
 	public IntroductionResponse(SessionId sessionId, MessageId messageId,
 			GroupId groupId, Role role, long time, boolean local, boolean sent,
-			boolean seen, boolean read, String name, boolean accepted) {
+			boolean seen, boolean read, String name, boolean accepted,
+			boolean successPossible) {
 		super(sessionId, messageId, groupId, role, time, local, sent, seen,
 				read);
 
 		this.name = name;
 		this.accepted = accepted;
+		this.successPossible = successPossible;
 	}
 
 	public String getName() {
@@ -32,4 +34,8 @@ public class IntroductionResponse extends IntroductionMessage {
 		return accepted;
 	}
 
+	public boolean isSuccessPossible() {
+		return successPossible;
+	}
+
 }

briar-core/src/main/java/org/briarproject/briar/introduction/AbstractProtocolEngine.java

@@ -149,11 +149,12 @@ abstract class AbstractProtocolEngine<S extends Session>
 			throws DbException {
 		AuthorId localAuthorId = identityManager.getLocalAuthor(txn).getId();
 		Contact c = contactManager.getContact(txn, sender, localAuthorId);
+		boolean possible = s.getState().successPossible();
 		IntroductionResponse response =
 				new IntroductionResponse(s.getSessionId(), m.getMessageId(),
 						m.getGroupId(), s.getRole(), m.getTimestamp(), false,
 						false, false, false, otherAuthor.getName(),
-						m instanceof AcceptMessage);
+						m instanceof AcceptMessage, possible);
 		IntroductionResponseReceivedEvent e =
 				new IntroductionResponseReceivedEvent(c.getId(), response);
 		txn.attach(e);

briar-core/src/main/java/org/briarproject/briar/introduction/IntroduceeState.java

@@ -34,4 +34,10 @@ enum IntroduceeState implements State {
 		throw new FormatException();
 	}
 
+	@Override
+	public boolean successPossible() {
+		return this != START && this != LOCAL_DECLINED &&
+				this != REMOTE_DECLINED;
+	}
+
 }

briar-core/src/main/java/org/briarproject/briar/introduction/IntroducerState.java

@@ -34,4 +34,9 @@ enum IntroducerState implements State {
 		throw new FormatException();
 	}
 
+	@Override
+	public boolean successPossible() {
+		return this != START && this != A_DECLINED && this != B_DECLINED;
+	}
+
 }

briar-core/src/main/java/org/briarproject/briar/introduction/IntroductionManagerImpl.java

@@ -470,6 +470,7 @@ class IntroductionManagerImpl extends ConversationClientImpl
 		Role role = sessionParser.getRole(bdfSession);
 		SessionId sessionId;
 		Author author;
+		boolean successPossible;
 		if (role == INTRODUCER) {
 			IntroducerSession session =
 					sessionParser.parseIntroducerSession(bdfSession);
@@ -479,15 +480,18 @@ class IntroductionManagerImpl extends ConversationClientImpl
 			} else {
 				author = session.getIntroduceeA().author;
 			}
+			successPossible = session.getState().successPossible();
 		} else if (role == INTRODUCEE) {
 			IntroduceeSession session = sessionParser
 					.parseIntroduceeSession(contactGroupId, bdfSession);
 			sessionId = session.getSessionId();
 			author = session.getRemote().author;
+			successPossible = session.getState().successPossible();
 		} else throw new AssertionError();
 		return new IntroductionResponse(sessionId, m, contactGroupId,
 				role, meta.getTimestamp(), meta.isLocal(), status.isSent(),
-				status.isSeen(), meta.isRead(), author.getName(), accept);
+				status.isSeen(), meta.isRead(), author.getName(), accept,
+				successPossible);
 	}
 
 	private void removeSessionWithIntroducer(Transaction txn,

briar-core/src/main/java/org/briarproject/briar/introduction/State.java

@@ -4,4 +4,6 @@ interface State {
 
 	int getValue();
 
+	boolean successPossible();
+
 }

briar-core/src/test/java/org/briarproject/briar/introduction/IntroductionIntegrationTest.java

@@ -415,8 +415,8 @@ public class IntroductionIntegrationTest
 		eventWaiter.await(TIMEOUT, 1);
 		assertTrue(listener0.response2Received);
 
-		// Forward AUTH
+		// Forward AUTH and response
-		sync0To1(1, true);
+		sync0To1(2, true);
 
 		// Second AUTH and ACTIVATE and forward them
 		sync1To0(2, true);