Unify all private message requests in one PrivateRequest class

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

@@ -43,8 +43,8 @@ import org.briarproject.briar.api.introduction.event.IntroductionRequestReceived
 import org.briarproject.briar.api.introduction.event.IntroductionResponseReceivedEvent;
 import org.briarproject.briar.api.messaging.ConversationManager;
 import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
-import org.briarproject.briar.api.sharing.InvitationRequest;
 import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
 import org.briarproject.briar.api.sharing.event.InvitationResponseReceivedEvent;
@@ -271,7 +271,7 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 			LOG.info("Invitation Request received, update item");
 			InvitationRequestReceivedEvent m =
 					(InvitationRequestReceivedEvent) e;
-			InvitationRequest ir = m.getRequest();
+			PrivateRequest ir = m.getRequest();
 			updateItem(m.getContactId(), ir);
 		} else if (e instanceof InvitationResponseReceivedEvent) {
 			LOG.info("Invitation response received, updating item");

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

@@ -62,7 +62,6 @@ import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.forum.ForumSharingManager;
 import org.briarproject.briar.api.introduction.IntroductionManager;
-import org.briarproject.briar.api.introduction.IntroductionMessage;
 import org.briarproject.briar.api.introduction.IntroductionRequest;
 import org.briarproject.briar.api.introduction.IntroductionResponse;
 import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
@@ -71,10 +70,9 @@ import org.briarproject.briar.api.messaging.MessagingManager;
 import org.briarproject.briar.api.messaging.PrivateMessage;
 import org.briarproject.briar.api.messaging.PrivateMessageFactory;
 import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.messaging.event.PrivateMessageReceivedEvent;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
-import org.briarproject.briar.api.sharing.InvitationMessage;
-import org.briarproject.briar.api.sharing.InvitationRequest;
 import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
 import org.briarproject.briar.api.sharing.event.InvitationResponseReceivedEvent;
@@ -344,15 +342,15 @@ public class ConversationActivity extends BriarActivity
 				long start = now();
 				Collection<PrivateMessageHeader> headers =
 						messagingManager.getMessageHeaders(contactId);
-				Collection<IntroductionMessage> introductions =
+				Collection<PrivateMessageHeader> introductions =
 						introductionManager.getIntroductionMessages(contactId);
-				Collection<InvitationMessage> forumInvitations =
+				Collection<PrivateMessageHeader> forumInvitations =
 						forumSharingManager.getInvitationMessages(contactId);
-				Collection<InvitationMessage> blogInvitations =
+				Collection<PrivateMessageHeader> blogInvitations =
 						blogSharingManager.getInvitationMessages(contactId);
-				Collection<InvitationMessage> groupInvitations =
+				Collection<PrivateMessageHeader> groupInvitations =
 						groupInvitationManager.getInvitationMessages(contactId);
-				List<InvitationMessage> invitations = new ArrayList<>(
+				List<PrivateMessageHeader> invitations = new ArrayList<>(
 						forumInvitations.size() + blogInvitations.size() +
 								groupInvitations.size());
 				invitations.addAll(forumInvitations);
@@ -370,8 +368,8 @@ public class ConversationActivity extends BriarActivity
 
 	private void displayMessages(int revision,
 			Collection<PrivateMessageHeader> headers,
-			Collection<IntroductionMessage> introductions,
-			Collection<InvitationMessage> invitations) {
+			Collection<PrivateMessageHeader> introductions,
+			Collection<PrivateMessageHeader> invitations) {
 		runOnUiThreadUnlessDestroyed(() -> {
 			if (revision == adapter.getRevision()) {
 				adapter.incrementRevision();
@@ -397,8 +395,8 @@ public class ConversationActivity extends BriarActivity
 	@SuppressWarnings("ConstantConditions")
 	private List<ConversationItem> createItems(
 			Collection<PrivateMessageHeader> headers,
-			Collection<IntroductionMessage> introductions,
-			Collection<InvitationMessage> invitations) {
+			Collection<PrivateMessageHeader> introductions,
+			Collection<PrivateMessageHeader> invitations) {
 		int size =
 				headers.size() + introductions.size() + invitations.size();
 		List<ConversationItem> items = new ArrayList<>(size);
@@ -409,7 +407,7 @@ public class ConversationActivity extends BriarActivity
 			else item.setBody(body);
 			items.add(item);
 		}
-		for (IntroductionMessage m : introductions) {
+		for (PrivateMessageHeader m : introductions) {
 			ConversationItem item;
 			if (m instanceof IntroductionRequest) {
 				IntroductionRequest i = (IntroductionRequest) m;
@@ -420,11 +418,11 @@ public class ConversationActivity extends BriarActivity
 			}
 			items.add(item);
 		}
-		for (InvitationMessage i : invitations) {
+		for (PrivateMessageHeader i : invitations) {
 			ConversationItem item;
-			if (i instanceof InvitationRequest) {
-				InvitationRequest r = (InvitationRequest) i;
-				item = ConversationItem.from(this, contactName, r);
+			if (i instanceof PrivateRequest) {
+				item = ConversationItem
+						.from(this, contactName, (PrivateRequest) i);
 			} else {
 				InvitationResponse r = (InvitationResponse) i;
 				item = ConversationItem.from(this, contactName, r);
@@ -525,7 +523,7 @@ public class ConversationActivity extends BriarActivity
 					(InvitationRequestReceivedEvent) e;
 			if (event.getContactId().equals(contactId)) {
 				LOG.info("Invitation received, adding...");
-				InvitationRequest ir = event.getRequest();
+				PrivateRequest ir = event.getRequest();
 				handleInvitationRequest(ir);
 			}
 		} else if (e instanceof InvitationResponseReceivedEvent) {
@@ -586,7 +584,7 @@ public class ConversationActivity extends BriarActivity
 		});
 	}
 
-	private void handleInvitationRequest(InvitationRequest m) {
+	private void handleInvitationRequest(PrivateRequest m) {
 		getContactNameTask().addListener(new FutureTaskListener<String>() {
 			@Override
 			public void onSuccess(String contactName) {

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

@@ -16,10 +16,11 @@ import org.briarproject.briar.api.forum.ForumInvitationResponse;
 import org.briarproject.briar.api.introduction.IntroductionRequest;
 import org.briarproject.briar.api.introduction.IntroductionResponse;
 import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
-import org.briarproject.briar.api.sharing.InvitationRequest;
 import org.briarproject.briar.api.sharing.InvitationResponse;
+import org.briarproject.briar.api.sharing.Shareable;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -86,35 +87,6 @@ abstract class ConversationItem {
 		}
 	}
 
-	static ConversationItem from(Context ctx, String contactName,
-			IntroductionRequest ir) {
-		if (ir.isLocal()) {
-			String text = ctx.getString(R.string.introduction_request_sent,
-					contactName, ir.getName());
-			return new ConversationNoticeOutItem(ir.getId(),
-					ir.getGroupId(), text, ir.getMessage(), ir.getTimestamp(),
-					ir.isSent(), ir.isSeen());
-		} else {
-			String text;
-			if (ir.wasAnswered()) {
-				text = ctx.getString(
-						R.string.introduction_request_answered_received,
-						contactName, ir.getName());
-			} else if (ir.contactExists()){
-				text = ctx.getString(
-						R.string.introduction_request_exists_received,
-						contactName, ir.getName());
-			} else {
-				text = ctx.getString(R.string.introduction_request_received,
-						contactName, ir.getName());
-			}
-			return new ConversationRequestItem(ir.getId(),
-					ir.getGroupId(), INTRODUCTION, ir.getSessionId(), text,
-					ir.getMessage(), ir.getTimestamp(), ir.isRead(), null,
-					ir.wasAnswered(), false);
-		}
-	}
-
 	static ConversationItem from(Context ctx, String contactName,
 			IntroductionResponse ir) {
 		if (ir.isLocal()) {
@@ -156,21 +128,22 @@ abstract class ConversationItem {
 	}
 
 	static ConversationItem from(Context ctx, String contactName,
-			InvitationRequest ir) {
+			PrivateRequest ir) {
 		if (ir.isLocal()) {
 			String text;
-			if (ir instanceof ForumInvitationRequest) {
+			if (ir instanceof IntroductionRequest) {
+				text = ctx.getString(R.string.introduction_request_sent,
+						contactName, ir.getName());
+			} else if (ir instanceof ForumInvitationRequest) {
 				text = ctx.getString(R.string.forum_invitation_sent,
-						((ForumInvitationRequest) ir).getForumName(),
-						contactName);
+						ir.getName(), contactName);
 			} else if (ir instanceof BlogInvitationRequest) {
 				text = ctx.getString(R.string.blogs_sharing_invitation_sent,
-						((BlogInvitationRequest) ir).getBlogAuthorName(),
-						contactName);
+						ir.getName(), contactName);
 			} else if (ir instanceof GroupInvitationRequest) {
 				text = ctx.getString(
 						R.string.groups_invitations_invitation_sent,
-						contactName, ir.getShareable().getName());
+						contactName, ir.getName());
 			} else {
 				throw new IllegalArgumentException("Unknown InvitationRequest");
 			}
@@ -180,20 +153,36 @@ abstract class ConversationItem {
 		} else {
 			String text;
 			RequestType type;
-			if (ir instanceof ForumInvitationRequest) {
+			if (ir instanceof IntroductionRequest) {
+				type = INTRODUCTION;
+				if (ir.wasAnswered()) {
+					text = ctx.getString(
+							R.string.introduction_request_answered_received,
+							contactName, ir.getName());
+				} else if (ir.doesExist()) {
+					text = ctx.getString(
+							R.string.introduction_request_exists_received,
+							contactName, ir.getName());
+				} else {
+					text = ctx.getString(R.string.introduction_request_received,
+							contactName, ir.getName());
+				}
+				return new ConversationRequestItem(ir.getId(),
+						ir.getGroupId(), type, ir.getSessionId(), text,
+						ir.getMessage(), ir.getTimestamp(), ir.isRead(), null,
+						ir.wasAnswered(), false);
+			} else if (ir instanceof ForumInvitationRequest) {
 				text = ctx.getString(R.string.forum_invitation_received,
-						contactName,
-						((ForumInvitationRequest) ir).getForumName());
+						contactName, ir.getName());
 				type = FORUM;
 			} else if (ir instanceof BlogInvitationRequest) {
 				text = ctx.getString(R.string.blogs_sharing_invitation_received,
-						contactName,
-						((BlogInvitationRequest) ir).getBlogAuthorName());
+						contactName, ir.getName());
 				type = BLOG;
 			} else if (ir instanceof GroupInvitationRequest) {
 				text = ctx.getString(
 						R.string.groups_invitations_invitation_received,
-						contactName, ir.getShareable().getName());
+						contactName, ir.getName());
 				type = GROUP;
 			} else {
 				throw new IllegalArgumentException("Unknown InvitationRequest");
@@ -201,8 +190,8 @@ abstract class ConversationItem {
 			return new ConversationRequestItem(ir.getId(),
 					ir.getGroupId(), type, ir.getSessionId(), text,
 					ir.getMessage(), ir.getTimestamp(), ir.isRead(),
-					ir.getShareable().getId(), !ir.isAvailable(),
-					ir.canBeOpened());
+					((Shareable) ir.getObject()).getId(), !ir.wasAnswered(),
+					ir.doesExist());
 		}
 	}
 
@@ -276,8 +265,8 @@ abstract class ConversationItem {
 			return from(ctx, "", (IntroductionRequest) h);
 		} else if(h instanceof IntroductionResponse) {
 			return from(ctx, "", (IntroductionResponse) h);
-		} else if(h instanceof InvitationRequest) {
-			return from(ctx, "", (InvitationRequest) h);
+		} else if(h instanceof PrivateRequest) {
+			return from(ctx, "", (PrivateRequest) h);
 		} else if(h instanceof InvitationResponse) {
 			return from(ctx, "", (InvitationResponse) h);
 		} else {

briar-api/src/main/java/org/briarproject/briar/api/blog/BlogInvitationRequest.java

@@ -1,27 +1,22 @@
 package org.briarproject.briar.api.blog;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 
 import javax.annotation.Nullable;
 
 @NotNullByDefault
-public class BlogInvitationRequest extends InvitationRequest<Blog> {
+public class BlogInvitationRequest extends PrivateRequest<Blog> {
 
 	public BlogInvitationRequest(MessageId id, GroupId groupId, long time,
 			boolean local, boolean sent, boolean seen, boolean read,
-			SessionId sessionId, Blog blog, ContactId contactId,
+			SessionId sessionId, Blog blog,
 			@Nullable String message, boolean available, boolean canBeOpened) {
 		super(id, groupId, time, local, sent, seen, read, sessionId, blog,
 				message, available, canBeOpened);
 	}
 
-	public String getBlogAuthorName() {
-		return getShareable().getName();
-	}
-
 }

briar-api/src/main/java/org/briarproject/briar/api/blog/event/BlogInvitationRequestReceivedEvent.java

@@ -3,7 +3,7 @@ package org.briarproject.briar.api.blog.event;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.api.blog.Blog;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
 
 import javax.annotation.concurrent.Immutable;
@@ -14,7 +14,7 @@ public class BlogInvitationRequestReceivedEvent extends
 		InvitationRequestReceivedEvent<Blog> {
 
 	public BlogInvitationRequestReceivedEvent(Blog blog, ContactId contactId,
-			InvitationRequest<Blog> request) {
+			PrivateRequest<Blog> request) {
 		super(blog, contactId, request);
 	}
 

briar-api/src/main/java/org/briarproject/briar/api/forum/ForumInvitationRequest.java

@@ -1,29 +1,24 @@
 package org.briarproject.briar.api.forum;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
 @NotNullByDefault
-public class ForumInvitationRequest extends InvitationRequest<Forum> {
+public class ForumInvitationRequest extends PrivateRequest<Forum> {
 
 	public ForumInvitationRequest(MessageId id, GroupId groupId, long time,
 			boolean local, boolean sent, boolean seen, boolean read,
-			SessionId sessionId, Forum forum, ContactId contactId,
+			SessionId sessionId, Forum forum,
 			@Nullable String message, boolean available, boolean canBeOpened) {
 		super(id, groupId, time, local, sent, seen, read, sessionId, forum,
 				message, available, canBeOpened);
 	}
 
-	public String getForumName() {
-		return getShareable().getName();
-	}
-
 }

briar-api/src/main/java/org/briarproject/briar/api/forum/event/ForumInvitationRequestReceivedEvent.java

@@ -3,7 +3,7 @@ package org.briarproject.briar.api.forum.event;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.api.forum.Forum;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.sharing.event.InvitationRequestReceivedEvent;
 
 import javax.annotation.concurrent.Immutable;
@@ -14,7 +14,7 @@ public class ForumInvitationRequestReceivedEvent extends
 		InvitationRequestReceivedEvent<Forum> {
 
 	public ForumInvitationRequestReceivedEvent(Forum forum, ContactId contactId,
-			InvitationRequest<Forum> request) {
+			PrivateRequest<Forum> request) {
 		super(forum, contactId, request);
 	}
 

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

@@ -0,0 +1,32 @@
+package org.briarproject.briar.api.introduction;
+
+import org.briarproject.bramble.api.identity.Author;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.api.messaging.Nameable;
+
+import javax.annotation.concurrent.Immutable;
+
+import static org.briarproject.briar.api.introduction.Role.INTRODUCER;
+
+@Immutable
+@NotNullByDefault
+public class Introduction implements Nameable {
+
+	private final Author introducedAuthor;
+	private final Role ourRole;
+
+	public Introduction(Author introducedAuthor, Role ourRole) {
+		this.introducedAuthor = introducedAuthor;
+		this.ourRole = ourRole;
+	}
+
+	@Override
+	public String getName() {
+		return introducedAuthor.getName();
+	}
+
+	public boolean isIntroducer() {
+		return ourRole == INTRODUCER;
+	}
+
+}

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

@@ -7,6 +7,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.ClientId;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.messaging.ConversationManager.ConversationClient;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 
 import java.util.Collection;
 
@@ -50,7 +51,7 @@ public interface IntroductionManager extends ConversationClient {
 	/**
 	 * Returns all introduction messages for the given contact.
 	 */
-	Collection<IntroductionMessage> getIntroductionMessages(ContactId contactId)
+	Collection<PrivateMessageHeader> getIntroductionMessages(ContactId contactId)
 			throws DbException;
 
 }

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

@@ -1,28 +0,0 @@
-package org.briarproject.briar.api.introduction;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.api.client.SessionId;
-import org.briarproject.briar.api.messaging.PrivateMessageHeader;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public abstract class IntroductionMessage extends PrivateMessageHeader {
-
-	private final SessionId sessionId;
-
-	IntroductionMessage(SessionId sessionId, MessageId messageId,
-			GroupId groupId, long time, boolean local, boolean sent,
-			boolean seen, boolean read) {
-		super(messageId, groupId, time, local, sent, seen, read);
-		this.sessionId = sessionId;
-	}
-
-	public SessionId getSessionId() {
-		return sessionId;
-	}
-
-}

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

@@ -1,48 +1,24 @@
 package org.briarproject.briar.api.introduction;
 
-import org.briarproject.bramble.api.identity.Author;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
 @NotNullByDefault
-public class IntroductionRequest extends IntroductionMessage {
+public class IntroductionRequest extends PrivateRequest<Introduction> {
 
-	private final Author introducedAuthor;
-	@Nullable
-	private final String message;
-	private final boolean answered, exists;
-
-	public IntroductionRequest(SessionId sessionId, MessageId messageId,
-			GroupId groupId, long time, boolean local, boolean sent,
-			boolean seen, boolean read, Author introducedAuthor,
+	public IntroductionRequest(MessageId messageId, GroupId groupId,
+			long time, boolean local, boolean sent, boolean seen, boolean read,
+			SessionId sessionId, Introduction introduction,
 			@Nullable String message, boolean answered, boolean exists) {
-		super(sessionId, messageId, groupId, time, local, sent, seen, read);
-		this.introducedAuthor = introducedAuthor;
-		this.message = message;
-		this.answered = answered;
-		this.exists = exists;
+		super(messageId, groupId, time, local, sent, seen, read, sessionId,
+				introduction, message, answered, exists);
 	}
 
-	public String getName() {
-		return introducedAuthor.getName();
-	}
-
-	@Nullable
-	public String getMessage() {
-		return message;
-	}
-
-	public boolean wasAnswered() {
-		return answered;
-	}
-
-	public boolean contactExists() {
-		return exists;
-	}
 }

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

@@ -4,6 +4,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 
 import javax.annotation.concurrent.Immutable;
 
@@ -11,8 +12,9 @@ import static org.briarproject.briar.api.introduction.Role.INTRODUCER;
 
 @Immutable
 @NotNullByDefault
-public class IntroductionResponse extends IntroductionMessage {
+public class IntroductionResponse extends PrivateMessageHeader {
 
+	private final SessionId sessionId;
 	private final String name;
 	private final Role role;
 	private final boolean accepted;
@@ -20,12 +22,17 @@ public class IntroductionResponse extends IntroductionMessage {
 	public IntroductionResponse(SessionId sessionId, MessageId messageId,
 			GroupId groupId, Role role, long time, boolean local, boolean sent,
 			boolean seen, boolean read, String name, boolean accepted) {
-		super(sessionId, messageId, groupId, time, local, sent, seen, read);
+		super(messageId, groupId, time, local, sent, seen, read);
+		this.sessionId = sessionId;
 		this.name = name;
 		this.role = role;
 		this.accepted = accepted;
 	}
 
+	public SessionId getSessionId() {
+		return sessionId;
+	}
+
 	public String getName() {
 		return name;
 	}

briar-api/src/main/java/org/briarproject/briar/api/messaging/Nameable.java

@@ -0,0 +1,10 @@
+package org.briarproject.briar.api.messaging;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+@NotNullByDefault
+public interface Nameable {
+
+	String getName();
+
+}

briar-api/src/main/java/org/briarproject/briar/api/messaging/PrivateRequest.java

@@ -0,0 +1,57 @@
+package org.briarproject.briar.api.messaging;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.bramble.api.sync.MessageId;
+import org.briarproject.briar.api.client.SessionId;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.Immutable;
+
+@Immutable
+@NotNullByDefault
+public class PrivateRequest<O extends Nameable> extends PrivateMessageHeader {
+
+	private final SessionId sessionId;
+	private final O object;
+	@Nullable
+	private final String message;
+	private final boolean answered, exists;
+
+	public PrivateRequest(MessageId messageId, GroupId groupId, long time,
+			boolean local, boolean sent, boolean seen, boolean read,
+			SessionId sessionId, O object, @Nullable String message,
+			boolean answered, boolean exists) {
+		super(messageId, groupId, time, local, sent, seen, read);
+		this.sessionId = sessionId;
+		this.object = object;
+		this.message = message;
+		this.answered = answered;
+		this.exists = exists;
+	}
+
+	public SessionId getSessionId() {
+		return sessionId;
+	}
+
+	public O getObject() {
+		return object;
+	}
+
+	public String getName() {
+		return object.getName();
+	}
+
+	@Nullable
+	public String getMessage() {
+		return message;
+	}
+
+	public boolean wasAnswered() {
+		return answered;
+	}
+
+	public boolean doesExist() {
+		return exists;
+	}
+}

briar-api/src/main/java/org/briarproject/briar/api/privategroup/invitation/GroupInvitationManager.java

@@ -9,8 +9,8 @@ import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.messaging.ConversationManager.ConversationClient;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.privategroup.PrivateGroup;
-import org.briarproject.briar.api.sharing.InvitationMessage;
 
 import java.util.Collection;
 
@@ -77,7 +77,7 @@ public interface GroupInvitationManager extends ConversationClient {
 	 * Returns all private group invitation messages related to the given
 	 * contact.
 	 */
-	Collection<InvitationMessage> getInvitationMessages(ContactId c)
+	Collection<PrivateMessageHeader> getInvitationMessages(ContactId c)
 			throws DbException;
 
 	/**

briar-api/src/main/java/org/briarproject/briar/api/privategroup/invitation/GroupInvitationRequest.java

@@ -1,23 +1,22 @@
 package org.briarproject.briar.api.privategroup.invitation;
 
-import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.privategroup.PrivateGroup;
-import org.briarproject.briar.api.sharing.InvitationRequest;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
 @NotNullByDefault
-public class GroupInvitationRequest extends InvitationRequest<PrivateGroup> {
+public class GroupInvitationRequest extends PrivateRequest<PrivateGroup> {
 
 	public GroupInvitationRequest(MessageId id, GroupId groupId, long time,
 			boolean local, boolean sent, boolean seen, boolean read,
-			SessionId sessionId, PrivateGroup shareable, ContactId contactId,
+			SessionId sessionId, PrivateGroup shareable,
 			@Nullable String message, boolean available, boolean canBeOpened) {
 		super(id, groupId, time, local, sent, seen, read, sessionId, shareable,
 				message, available, canBeOpened);

briar-api/src/main/java/org/briarproject/briar/api/sharing/InvitationMessage.java

@@ -1,28 +0,0 @@
-package org.briarproject.briar.api.sharing;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.api.client.SessionId;
-import org.briarproject.briar.api.messaging.PrivateMessageHeader;
-
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public abstract class InvitationMessage extends PrivateMessageHeader {
-
-	private final SessionId sessionId;
-
-	public InvitationMessage(MessageId id, GroupId groupId, long time,
-			boolean local, boolean sent, boolean seen, boolean read,
-			SessionId sessionId) {
-		super(id, groupId, time, local, sent, seen, read);
-		this.sessionId = sessionId;
-	}
-
-	public SessionId getSessionId() {
-		return sessionId;
-	}
-
-}

briar-api/src/main/java/org/briarproject/briar/api/sharing/InvitationRequest.java

@@ -1,49 +0,0 @@
-package org.briarproject.briar.api.sharing;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.api.client.SessionId;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.Immutable;
-
-@Immutable
-@NotNullByDefault
-public abstract class InvitationRequest<S extends Shareable>
-		extends InvitationMessage {
-
-	private final S shareable;
-	@Nullable
-	private final String message;
-	private final boolean available, canBeOpened;
-
-	public InvitationRequest(MessageId id, GroupId groupId, long time,
-			boolean local, boolean sent, boolean seen, boolean read,
-			SessionId sessionId, S shareable,
-			@Nullable String message, boolean available, boolean canBeOpened) {
-		super(id, groupId, time, local, sent, seen, read, sessionId);
-		this.shareable = shareable;
-		this.message = message;
-		this.available = available;
-		this.canBeOpened = canBeOpened;
-	}
-
-	@Nullable
-	public String getMessage() {
-		return message;
-	}
-
-	public boolean isAvailable() {
-		return available;
-	}
-
-	public boolean canBeOpened() {
-		return canBeOpened;
-	}
-
-	public S getShareable() {
-		return shareable;
-	}
-
-}

briar-api/src/main/java/org/briarproject/briar/api/sharing/InvitationResponse.java

@@ -4,13 +4,15 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 
 import javax.annotation.concurrent.Immutable;
 
 @Immutable
 @NotNullByDefault
-public abstract class InvitationResponse extends InvitationMessage {
+public abstract class InvitationResponse extends PrivateMessageHeader {
 
+	private final SessionId sessionId;
 	private final GroupId shareableId;
 	private final boolean accept;
 
@@ -18,11 +20,16 @@ public abstract class InvitationResponse extends InvitationMessage {
 			long time, boolean local, boolean sent, boolean seen,
 			boolean read, SessionId sessionId, GroupId shareableId,
 			boolean accept) {
-		super(id, groupId, time, local, sent, seen, read, sessionId);
+		super(id, groupId, time, local, sent, seen, read);
+		this.sessionId = sessionId;
 		this.shareableId = shareableId;
 		this.accept = accept;
 	}
 
+	public SessionId getSessionId() {
+		return sessionId;
+	}
+
 	public boolean wasAccepted() {
 		return accept;
 	}

briar-api/src/main/java/org/briarproject/briar/api/sharing/Shareable.java

@@ -2,12 +2,11 @@ package org.briarproject.briar.api.sharing;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
+import org.briarproject.briar.api.messaging.Nameable;
 
 @NotNullByDefault
-public interface Shareable {
+public interface Shareable extends Nameable {
 
 	GroupId getId();
 
-	String getName();
-
 }

briar-api/src/main/java/org/briarproject/briar/api/sharing/SharingManager.java

@@ -7,6 +7,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.messaging.ConversationManager.ConversationClient;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 
 import java.util.Collection;
 
@@ -39,7 +40,7 @@ public interface SharingManager<S extends Shareable>
 	 * Returns all group sharing messages sent by the Contact
 	 * identified by contactId.
 	 */
-	Collection<InvitationMessage> getInvitationMessages(
+	Collection<PrivateMessageHeader> getInvitationMessages(
 			ContactId contactId) throws DbException;
 
 	/**

briar-api/src/main/java/org/briarproject/briar/api/sharing/event/InvitationRequestReceivedEvent.java

@@ -3,7 +3,7 @@ package org.briarproject.briar.api.sharing.event;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.sharing.Shareable;
 
 import javax.annotation.concurrent.Immutable;
@@ -15,10 +15,10 @@ public abstract class InvitationRequestReceivedEvent<S extends Shareable>
 
 	private final S shareable;
 	private final ContactId contactId;
-	private final InvitationRequest request;
+	private final PrivateRequest<S> request;
 
 	protected InvitationRequestReceivedEvent(S shareable, ContactId contactId,
-			InvitationRequest request) {
+			PrivateRequest<S> request) {
 		this.shareable = shareable;
 		this.contactId = contactId;
 		this.request = request;
@@ -28,7 +28,7 @@ public abstract class InvitationRequestReceivedEvent<S extends Shareable>
 		return contactId;
 	}
 
-	public InvitationRequest getRequest() {
+	public PrivateRequest<S> getRequest() {
 		return request;
 	}
 

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

@@ -26,6 +26,7 @@ import org.briarproject.bramble.api.transport.KeySetId;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.introduction.Introduction;
 import org.briarproject.briar.api.introduction.IntroductionRequest;
 import org.briarproject.briar.api.introduction.event.IntroductionAbortedEvent;
 import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
@@ -254,9 +255,11 @@ class IntroduceeProtocolEngine
 				localAuthor.getId());
 		boolean contactExists = contactManager
 				.contactExists(txn, m.getAuthor().getId(), localAuthor.getId());
-		IntroductionRequest request = new IntroductionRequest(s.getSessionId(),
-				m.getMessageId(), m.getGroupId(), m.getTimestamp(), false,
-				false, false, false, m.getAuthor(), m.getMessage(), false,
+		Introduction introduction =
+				new Introduction(m.getAuthor(), s.getRole());
+		IntroductionRequest request = new IntroductionRequest(m.getMessageId(),
+				m.getGroupId(), m.getTimestamp(), false, false, false, false,
+				s.getSessionId(), introduction, m.getMessage(), false,
 				contactExists);
 		IntroductionRequestReceivedEvent e =
 				new IntroductionRequestReceivedEvent(c.getId(), request);

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

@@ -29,11 +29,12 @@ import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager.ClientVersioningHook;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.introduction.Introduction;
 import org.briarproject.briar.api.introduction.IntroductionManager;
-import org.briarproject.briar.api.introduction.IntroductionMessage;
 import org.briarproject.briar.api.introduction.IntroductionRequest;
 import org.briarproject.briar.api.introduction.IntroductionResponse;
 import org.briarproject.briar.api.introduction.Role;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.client.ConversationClientImpl;
 import org.briarproject.briar.introduction.IntroducerSession.Introducee;
 
@@ -398,9 +399,9 @@ class IntroductionManagerImpl extends ConversationClientImpl
 	}
 
 	@Override
-	public Collection<IntroductionMessage> getIntroductionMessages(ContactId c)
+	public Collection<PrivateMessageHeader> getIntroductionMessages(ContactId c)
 			throws DbException {
-		List<IntroductionMessage> messages;
+		List<PrivateMessageHeader> messages;
 		Transaction txn = db.startTransaction(true);
 		try {
 			Contact contact = db.getContact(txn, c);
@@ -470,11 +471,11 @@ class IntroductionManagerImpl extends ConversationClientImpl
 		boolean contactExists = contactManager
 				.contactExists(txn, rm.getAuthor().getId(),
 						localAuthor.getId());
-
-		return new IntroductionRequest(sessionId, m, contactGroupId,
-				meta.getTimestamp(), meta.isLocal(), status.isSent(),
-				status.isSeen(), meta.isRead(), author, message,
-				!meta.isAvailableToAnswer(), contactExists);
+		Introduction introduction = new Introduction(author, role);
+		return new IntroductionRequest(m, contactGroupId, meta.getTimestamp(),
+				meta.isLocal(), status.isSent(), status.isSeen(), meta.isRead(),
+				sessionId, introduction, message, !meta.isAvailableToAnswer(),
+				contactExists);
 	}
 
 	private IntroductionResponse parseInvitationResponse(GroupId contactGroupId,

briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/GroupInvitationManagerImpl.java

@@ -26,6 +26,7 @@ import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager.ClientVersioningHook;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.privategroup.PrivateGroup;
 import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
 import org.briarproject.briar.api.privategroup.PrivateGroupManager;
@@ -34,7 +35,6 @@ import org.briarproject.briar.api.privategroup.invitation.GroupInvitationItem;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
-import org.briarproject.briar.api.sharing.InvitationMessage;
 import org.briarproject.briar.client.ConversationClientImpl;
 
 import java.util.ArrayList;
@@ -368,9 +368,9 @@ class GroupInvitationManagerImpl extends ConversationClientImpl
 	}
 
 	@Override
-	public Collection<InvitationMessage> getInvitationMessages(ContactId c)
+	public Collection<PrivateMessageHeader> getInvitationMessages(ContactId c)
 			throws DbException {
-		List<InvitationMessage> messages;
+		List<PrivateMessageHeader> messages;
 		Transaction txn = db.startTransaction(true);
 		try {
 			Contact contact = db.getContact(txn, c);
@@ -422,7 +422,7 @@ class GroupInvitationManagerImpl extends ConversationClientImpl
 				db.containsGroup(txn, invite.getPrivateGroupId());
 		return new GroupInvitationRequest(m, contactGroupId,
 				meta.getTimestamp(), meta.isLocal(), status.isSent(),
-				status.isSeen(), meta.isRead(), sessionId, pg, c,
+				status.isSeen(), meta.isRead(), sessionId, pg,
 				invite.getMessage(), meta.isAvailableToAnswer(), canBeOpened);
 	}
 

briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngine.java

@@ -331,7 +331,7 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
 			PrivateGroup pg, ContactId c) {
 		SessionId sessionId = new SessionId(m.getPrivateGroupId().getBytes());
 		return new GroupInvitationRequest(m.getId(), m.getContactGroupId(),
-				m.getTimestamp(), false, false, true, false, sessionId, pg, c,
+				m.getTimestamp(), false, false, true, false, sessionId, pg,
 				m.getMessage(), true, false);
 	}
 

briar-core/src/main/java/org/briarproject/briar/sharing/BlogInvitationFactoryImpl.java

@@ -24,7 +24,7 @@ public class BlogInvitationFactoryImpl
 		SessionId sessionId = new SessionId(m.getShareableId().getBytes());
 		return new BlogInvitationRequest(m.getId(), m.getContactGroupId(),
 				m.getTimestamp(), local, sent, seen, read, sessionId,
-				m.getShareable(), c, m.getMessage(), available, canBeOpened);
+				m.getShareable(), m.getMessage(), available, canBeOpened);
 	}
 
 	@Override

briar-core/src/main/java/org/briarproject/briar/sharing/BlogProtocolEngineImpl.java

@@ -18,7 +18,7 @@ import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.event.BlogInvitationRequestReceivedEvent;
 import org.briarproject.briar.api.blog.event.BlogInvitationResponseReceivedEvent;
 import org.briarproject.briar.api.client.MessageTracker;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
@@ -50,7 +50,7 @@ class BlogProtocolEngineImpl extends ProtocolEngineImpl<Blog> {
 	@Override
 	Event getInvitationRequestReceivedEvent(InviteMessage<Blog> m,
 			ContactId contactId, boolean available, boolean canBeOpened) {
-		InvitationRequest<Blog> request = invitationFactory
+		PrivateRequest<Blog> request = invitationFactory
 				.createInvitationRequest(false, false, true, false, m,
 						contactId, available, canBeOpened);
 		return new BlogInvitationRequestReceivedEvent(m.getShareable(),

briar-core/src/main/java/org/briarproject/briar/sharing/ForumInvitationFactoryImpl.java

@@ -24,7 +24,7 @@ public class ForumInvitationFactoryImpl
 		SessionId sessionId = new SessionId(m.getShareableId().getBytes());
 		return new ForumInvitationRequest(m.getId(), m.getContactGroupId(),
 				m.getTimestamp(), local, sent, seen, read, sessionId,
-				m.getShareable(), c, m.getMessage(), available, canBeOpened);
+				m.getShareable(), m.getMessage(), available, canBeOpened);
 	}
 
 	@Override

briar-core/src/main/java/org/briarproject/briar/sharing/ForumProtocolEngineImpl.java

@@ -18,7 +18,7 @@ import org.briarproject.briar.api.forum.ForumInvitationResponse;
 import org.briarproject.briar.api.forum.ForumManager;
 import org.briarproject.briar.api.forum.event.ForumInvitationRequestReceivedEvent;
 import org.briarproject.briar.api.forum.event.ForumInvitationResponseReceivedEvent;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
@@ -52,7 +52,7 @@ class ForumProtocolEngineImpl extends ProtocolEngineImpl<Forum> {
 	@Override
 	Event getInvitationRequestReceivedEvent(InviteMessage<Forum> m,
 			ContactId contactId, boolean available, boolean canBeOpened) {
-		InvitationRequest<Forum> request = invitationFactory
+		PrivateRequest<Forum> request = invitationFactory
 				.createInvitationRequest(false, false, true, false, m,
 						contactId, available, canBeOpened);
 		return new ForumInvitationRequestReceivedEvent(m.getShareable(),

briar-core/src/main/java/org/briarproject/briar/sharing/InvitationFactory.java

@@ -3,13 +3,13 @@ package org.briarproject.briar.sharing;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.sync.MessageId;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.api.sharing.Shareable;
 
 public interface InvitationFactory<S extends Shareable, I extends InvitationResponse> {
 
-	InvitationRequest<S> createInvitationRequest(boolean local, boolean sent,
+	PrivateRequest<S> createInvitationRequest(boolean local, boolean sent,
 			boolean seen, boolean read, InviteMessage<S> m, ContactId c,
 			boolean available, boolean canBeOpened);
 

briar-core/src/main/java/org/briarproject/briar/sharing/SharingManagerImpl.java

@@ -26,8 +26,8 @@ import org.briarproject.bramble.api.versioning.ClientVersioningManager;
 import org.briarproject.bramble.api.versioning.ClientVersioningManager.ClientVersioningHook;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.SessionId;
-import org.briarproject.briar.api.sharing.InvitationMessage;
-import org.briarproject.briar.api.sharing.InvitationRequest;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
+import org.briarproject.briar.api.messaging.PrivateRequest;
 import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.api.sharing.Shareable;
 import org.briarproject.briar.api.sharing.SharingInvitationItem;
@@ -321,9 +321,9 @@ abstract class SharingManagerImpl<S extends Shareable>
 	}
 
 	@Override
-	public Collection<InvitationMessage> getInvitationMessages(ContactId c)
+	public Collection<PrivateMessageHeader> getInvitationMessages(ContactId c)
 			throws DbException {
-		List<InvitationMessage> messages;
+		List<PrivateMessageHeader> messages;
 		Transaction txn = db.startTransaction(true);
 		try {
 			Contact contact = db.getContact(txn, c);
@@ -360,7 +360,7 @@ abstract class SharingManagerImpl<S extends Shareable>
 		return messages;
 	}
 
-	private InvitationRequest parseInvitationRequest(Transaction txn,
+	private PrivateRequest parseInvitationRequest(Transaction txn,
 			ContactId c, MessageId m, MessageMetadata meta,
 			MessageStatus status) throws DbException, FormatException {
 		// Look up the invite message to get the details of the private group

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

@@ -25,13 +25,13 @@ import org.briarproject.bramble.test.TestDatabaseModule;
 import org.briarproject.briar.api.client.ProtocolStateException;
 import org.briarproject.briar.api.client.SessionId;
 import org.briarproject.briar.api.introduction.IntroductionManager;
-import org.briarproject.briar.api.introduction.IntroductionMessage;
 import org.briarproject.briar.api.introduction.IntroductionRequest;
 import org.briarproject.briar.api.introduction.IntroductionResponse;
 import org.briarproject.briar.api.introduction.event.IntroductionAbortedEvent;
 import org.briarproject.briar.api.introduction.event.IntroductionRequestReceivedEvent;
 import org.briarproject.briar.api.introduction.event.IntroductionResponseReceivedEvent;
 import org.briarproject.briar.api.introduction.event.IntroductionSucceededEvent;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.test.BriarIntegrationTest;
 import org.junit.Before;
 import org.junit.Test;
@@ -608,10 +608,10 @@ public class IntroductionIntegrationTest
 		// assert that introducees get notified about the existing contact
 		IntroductionRequest ir1 =
 				getIntroductionRequest(introductionManager1, contactId0From1);
-		assertTrue(ir1.contactExists());
+		assertTrue(ir1.doesExist());
 		IntroductionRequest ir2 =
 				getIntroductionRequest(introductionManager2, contactId0From2);
-		assertTrue(ir2.contactExists());
+		assertTrue(ir2.doesExist());
 
 		// sync ACCEPT messages back to introducer
 		sync1To0(1, true);
@@ -1100,7 +1100,7 @@ public class IntroductionIntegrationTest
 	}
 
 	private void assertDefaultUiMessages() throws DbException {
-		Collection<IntroductionMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				introductionManager0.getIntroductionMessages(contactId1From0);
 		assertEquals(2, messages.size());
 		assertMessagesAreAcked(messages);
@@ -1122,8 +1122,8 @@ public class IntroductionIntegrationTest
 	}
 
 	private void assertMessagesAreAcked(
-			Collection<IntroductionMessage> messages) {
-		for (IntroductionMessage msg : messages) {
+			Collection<PrivateMessageHeader> messages) {
+		for (PrivateMessageHeader msg : messages) {
 			if (msg.isLocal()) assertTrue(msg.isSeen());
 		}
 	}
@@ -1299,7 +1299,7 @@ public class IntroductionIntegrationTest
 	private IntroductionRequest getIntroductionRequest(
 			IntroductionManager manager, ContactId contactId)
 			throws DbException {
-		for (IntroductionMessage im : manager
+		for (PrivateMessageHeader im : manager
 				.getIntroductionMessages(contactId)) {
 			if (im instanceof IntroductionRequest) {
 				return (IntroductionRequest) im;

briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/GroupInvitationIntegrationTest.java

@@ -4,6 +4,7 @@ import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.sync.Group;
 import org.briarproject.bramble.test.TestDatabaseModule;
 import org.briarproject.briar.api.client.ProtocolStateException;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.privategroup.GroupMessage;
 import org.briarproject.briar.api.privategroup.PrivateGroup;
 import org.briarproject.briar.api.privategroup.PrivateGroupManager;
@@ -11,7 +12,6 @@ import org.briarproject.briar.api.privategroup.invitation.GroupInvitationItem;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationManager;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
-import org.briarproject.briar.api.sharing.InvitationMessage;
 import org.briarproject.briar.api.sharing.InvitationResponse;
 import org.briarproject.briar.test.BriarIntegrationTest;
 import org.briarproject.briar.test.BriarIntegrationTestComponent;
@@ -92,18 +92,18 @@ public class GroupInvitationIntegrationTest
 		assertEquals(privateGroup0.getName(), item.getName());
 		assertFalse(item.isSubscribed());
 
-		Collection<InvitationMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				groupInvitationManager1.getInvitationMessages(contactId0From1);
 		assertEquals(1, messages.size());
 		GroupInvitationRequest request =
 				(GroupInvitationRequest) messages.iterator().next();
 		assertEquals(msg, request.getMessage());
-		assertEquals(author0, request.getShareable().getCreator());
+		assertEquals(author0, request.getObject().getCreator());
 		assertEquals(timestamp, request.getTimestamp());
-		assertEquals(privateGroup0.getName(), request.getShareable().getName());
+		assertEquals(privateGroup0.getName(), request.getObject().getName());
 		assertFalse(request.isLocal());
 		assertFalse(request.isRead());
-		assertFalse(request.canBeOpened());
+		assertFalse(request.doesExist());
 	}
 
 	@Test
@@ -117,11 +117,11 @@ public class GroupInvitationIntegrationTest
 		groupInvitationManager1
 				.respondToInvitation(contactId0From1, privateGroup0, false);
 
-		Collection<InvitationMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				groupInvitationManager1.getInvitationMessages(contactId0From1);
 		assertEquals(2, messages.size());
 		boolean foundResponse = false;
-		for (InvitationMessage m : messages) {
+		for (PrivateMessageHeader m : messages) {
 			if (m instanceof GroupInvitationResponse) {
 				foundResponse = true;
 				InvitationResponse response = (GroupInvitationResponse) m;
@@ -137,7 +137,7 @@ public class GroupInvitationIntegrationTest
 				groupInvitationManager0.getInvitationMessages(contactId1From0);
 		assertEquals(2, messages.size());
 		foundResponse = false;
-		for (InvitationMessage m : messages) {
+		for (PrivateMessageHeader m : messages) {
 			if (m instanceof GroupInvitationResponse) {
 				foundResponse = true;
 				InvitationResponse response = (GroupInvitationResponse) m;
@@ -164,17 +164,17 @@ public class GroupInvitationIntegrationTest
 		groupInvitationManager1
 				.respondToInvitation(contactId0From1, privateGroup0, true);
 
-		Collection<InvitationMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				groupInvitationManager1.getInvitationMessages(contactId0From1);
 		assertEquals(2, messages.size());
 		boolean foundResponse = false;
-		for (InvitationMessage m : messages) {
+		for (PrivateMessageHeader m : messages) {
 			if (m instanceof GroupInvitationResponse) {
 				foundResponse = true;
 				InvitationResponse response = (GroupInvitationResponse) m;
 				assertTrue(response.wasAccepted());
 			} else {
-				assertTrue(((GroupInvitationRequest) m).canBeOpened());
+				assertTrue(((GroupInvitationRequest) m).doesExist());
 			}
 		}
 		assertTrue(foundResponse);
@@ -185,7 +185,7 @@ public class GroupInvitationIntegrationTest
 				groupInvitationManager0.getInvitationMessages(contactId1From0);
 		assertEquals(2, messages.size());
 		foundResponse = false;
-		for (InvitationMessage m : messages) {
+		for (PrivateMessageHeader m : messages) {
 			if (m instanceof GroupInvitationResponse) {
 				foundResponse = true;
 				InvitationResponse response = (GroupInvitationResponse) m;
@@ -216,7 +216,7 @@ public class GroupInvitationIntegrationTest
 		// 1 has one unread message
 		Group g0 = groupInvitationManager1.getContactGroup(contact0From1);
 		assertGroupCount(messageTracker1, g0.getId(), 1, 1, timestamp);
-		InvitationMessage m =
+		PrivateMessageHeader m =
 				groupInvitationManager1.getInvitationMessages(contactId0From1)
 						.iterator().next();
 

briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/GroupInvitationManagerImplTest.java

@@ -24,13 +24,13 @@ import org.briarproject.bramble.test.BrambleMockTestCase;
 import org.briarproject.bramble.test.TestUtils;
 import org.briarproject.briar.api.client.MessageTracker;
 import org.briarproject.briar.api.client.SessionId;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.privategroup.PrivateGroup;
 import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
 import org.briarproject.briar.api.privategroup.PrivateGroupManager;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationItem;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRequest;
 import org.briarproject.briar.api.privategroup.invitation.GroupInvitationResponse;
-import org.briarproject.briar.api.sharing.InvitationMessage;
 import org.jmock.AbstractExpectations;
 import org.jmock.Expectations;
 import org.jmock.lib.legacy.ClassImposteriser;
@@ -701,10 +701,10 @@ public class GroupInvitationManagerImplTest extends BrambleMockTestCase {
 			oneOf(db).endTransaction(txn);
 		}});
 
-		Collection<InvitationMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				groupInvitationManager.getInvitationMessages(contactId);
 		assertEquals(2, messages.size());
-		for (InvitationMessage m : messages) {
+		for (PrivateMessageHeader m : messages) {
 			assertEquals(contactGroup.getId(), m.getGroupId());
 			if (m.getId().equals(message.getId())) {
 				assertTrue(m instanceof GroupInvitationRequest);

briar-core/src/test/java/org/briarproject/briar/sharing/BlogSharingIntegrationTest.java

@@ -18,7 +18,7 @@ import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogSharingManager;
 import org.briarproject.briar.api.blog.event.BlogInvitationRequestReceivedEvent;
 import org.briarproject.briar.api.blog.event.BlogInvitationResponseReceivedEvent;
-import org.briarproject.briar.api.sharing.InvitationMessage;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.test.BriarIntegrationTest;
 import org.briarproject.briar.test.BriarIntegrationTestComponent;
 import org.briarproject.briar.test.DaggerBriarIntegrationTestComponent;
@@ -147,17 +147,17 @@ public class BlogSharingIntegrationTest
 		assertTrue(blogManager1.getBlogs().contains(blog2));
 
 		// invitee has one invitation message from sharer
-		List<InvitationMessage> list = new ArrayList<>(
+		List<PrivateMessageHeader> list = new ArrayList<>(
 				blogSharingManager1.getInvitationMessages(contactId0From1));
 		assertEquals(2, list.size());
 		// check other things are alright with the message
-		for (InvitationMessage m : list) {
+		for (PrivateMessageHeader m : list) {
 			if (m instanceof BlogInvitationRequest) {
 				BlogInvitationRequest invitation = (BlogInvitationRequest) m;
-				assertFalse(invitation.isAvailable());
+				assertFalse(invitation.wasAnswered());
 				assertEquals(blog2.getAuthor().getName(),
-						invitation.getBlogAuthorName());
-				assertFalse(invitation.getShareable().isRssFeed());
+						invitation.getName());
+				assertFalse(invitation.getObject().isRssFeed());
 				assertEquals("Hi!", invitation.getMessage());
 			} else {
 				BlogInvitationResponse response = (BlogInvitationResponse) m;
@@ -218,17 +218,17 @@ public class BlogSharingIntegrationTest
 		assertTrue(blogManager1.getBlogs().contains(rssBlog));
 
 		// invitee has one invitation message from sharer
-		List<InvitationMessage> list = new ArrayList<>(
+		List<PrivateMessageHeader> list = new ArrayList<>(
 				blogSharingManager1.getInvitationMessages(contactId0From1));
 		assertEquals(2, list.size());
 		// check other things are alright with the message
-		for (InvitationMessage m : list) {
+		for (PrivateMessageHeader m : list) {
 			if (m instanceof BlogInvitationRequest) {
 				BlogInvitationRequest invitation = (BlogInvitationRequest) m;
-				assertFalse(invitation.isAvailable());
+				assertFalse(invitation.wasAnswered());
 				assertEquals(rssBlog.getAuthor().getName(),
-						invitation.getBlogAuthorName());
-				assertTrue(invitation.getShareable().isRssFeed());
+						invitation.getName());
+				assertTrue(invitation.getObject().isRssFeed());
 				assertEquals("Hi!", invitation.getMessage());
 			} else {
 				BlogInvitationResponse response = (BlogInvitationResponse) m;
@@ -277,16 +277,16 @@ public class BlogSharingIntegrationTest
 		assertEquals(0, blogSharingManager1.getInvitations().size());
 
 		// invitee has one invitation message from sharer and one response
-		List<InvitationMessage> list = new ArrayList<>(
+		List<PrivateMessageHeader> list = new ArrayList<>(
 				blogSharingManager1.getInvitationMessages(contactId0From1));
 		assertEquals(2, list.size());
 		// check things are alright with the  message
-		for (InvitationMessage m : list) {
+		for (PrivateMessageHeader m : list) {
 			if (m instanceof BlogInvitationRequest) {
 				BlogInvitationRequest invitation = (BlogInvitationRequest) m;
-				assertFalse(invitation.isAvailable());
+				assertFalse(invitation.wasAnswered());
 				assertEquals(blog2.getAuthor().getName(),
-						invitation.getBlogAuthorName());
+						invitation.getName());
 				assertEquals(null, invitation.getMessage());
 			} else {
 				BlogInvitationResponse response = (BlogInvitationResponse) m;
@@ -382,7 +382,7 @@ public class BlogSharingIntegrationTest
 		assertTrue(contacts.contains(contact0From1));
 
 		// make sure 1 knows that they have blog2 already
-		Collection<InvitationMessage> messages =
+		Collection<PrivateMessageHeader> messages =
 				blogSharingManager1.getInvitationMessages(contactId0From1);
 		assertEquals(2, messages.size());
 		assertEquals(blog2, blogManager1.getBlog(blog2.getId()));

briar-core/src/test/java/org/briarproject/briar/sharing/ForumSharingIntegrationTest.java

@@ -22,7 +22,7 @@ import org.briarproject.briar.api.forum.ForumPostHeader;
 import org.briarproject.briar.api.forum.ForumSharingManager;
 import org.briarproject.briar.api.forum.event.ForumInvitationRequestReceivedEvent;
 import org.briarproject.briar.api.forum.event.ForumInvitationResponseReceivedEvent;
-import org.briarproject.briar.api.sharing.InvitationMessage;
+import org.briarproject.briar.api.messaging.PrivateMessageHeader;
 import org.briarproject.briar.api.sharing.SharingInvitationItem;
 import org.briarproject.briar.test.BriarIntegrationTest;
 import org.briarproject.briar.test.BriarIntegrationTestComponent;
@@ -131,18 +131,18 @@ public class ForumSharingIntegrationTest
 		assertEquals(1, forumManager1.getForums().size());
 
 		// invitee has one invitation message from sharer
-		List<InvitationMessage> list = new ArrayList<>(
+		List<PrivateMessageHeader> list = new ArrayList<>(
 				forumSharingManager1.getInvitationMessages(contactId0From1));
 		assertEquals(2, list.size());
 		// check other things are alright with the forum message
-		for (InvitationMessage m : list) {
+		for (PrivateMessageHeader m : list) {
 			if (m instanceof ForumInvitationRequest) {
 				ForumInvitationRequest invitation =
 						(ForumInvitationRequest) m;
-				assertFalse(invitation.isAvailable());
-				assertEquals(forum0.getName(), invitation.getForumName());
+				assertFalse(invitation.wasAnswered());
+				assertEquals(forum0.getName(), invitation.getName());
 				assertEquals("Hi!", invitation.getMessage());
-				assertTrue(invitation.canBeOpened());
+				assertTrue(invitation.doesExist());
 			} else {
 				ForumInvitationResponse response =
 						(ForumInvitationResponse) m;
@@ -188,17 +188,17 @@ public class ForumSharingIntegrationTest
 		assertEquals(0, forumSharingManager1.getInvitations().size());
 
 		// invitee has one invitation message from sharer and one response
-		List<InvitationMessage> list = new ArrayList<>(
+		List<PrivateMessageHeader> list = new ArrayList<>(
 				forumSharingManager1.getInvitationMessages(contactId0From1));
 		assertEquals(2, list.size());
 		// check things are alright with the forum message
-		for (InvitationMessage m : list) {
+		for (PrivateMessageHeader m : list) {
 			if (m instanceof ForumInvitationRequest) {
 				ForumInvitationRequest invitation = (ForumInvitationRequest) m;
-				assertFalse(invitation.isAvailable());
-				assertEquals(forum0.getName(), invitation.getForumName());
+				assertFalse(invitation.wasAnswered());
+				assertEquals(forum0.getName(), invitation.getName());
 				assertEquals(null, invitation.getMessage());
-				assertFalse(invitation.canBeOpened());
+				assertFalse(invitation.doesExist());
 			} else {
 				ForumInvitationResponse response = (ForumInvitationResponse) m;
 				assertFalse(response.wasAccepted());
@@ -742,7 +742,7 @@ public class ForumSharingIntegrationTest
 
 		// get invitation MessageId for later
 		MessageId invitationId = null;
-		for (InvitationMessage m : forumSharingManager1
+		for (PrivateMessageHeader m : forumSharingManager1
 				.getInvitationMessages(contactId0From1)) {
 			if (m instanceof ForumInvitationRequest) {
 				invitationId = m.getId();