add transactional versions to functions related to forums

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

@@ -48,6 +48,11 @@ public interface ForumManager {
 	 */
 	void removeForum(Forum f) throws DbException;
 
+	/**
+	 * Unsubscribes from a forum.
+	 */
+	void removeForum(Transaction txn, Forum f) throws DbException;
+
 	/**
 	 * Creates a local forum post.
 	 */
@@ -127,6 +132,11 @@ public interface ForumManager {
 	 */
 	void setReadFlag(GroupId g, MessageId m, boolean read) throws DbException;
 
+	/**
+	 * Marks a message as read or unread and updates the group count.
+	 */
+	void setReadFlag(Transaction txn, GroupId g, MessageId m, boolean read) throws DbException;
+
 	interface RemoveForumHook {
 		/**
 		 * Called when a forum is being removed.

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

@@ -24,23 +24,48 @@ public interface SharingManager<S extends Shareable>
 	void sendInvitation(GroupId shareableId, ContactId contactId,
 			@Nullable String text) throws DbException;
 
+	/**
+	 * Sends an invitation to share the given group with the given contact,
+	 * including optional text.
+	 */
+	void sendInvitation(Transaction txn, GroupId shareableId,
+			ContactId contactId, @Nullable String text) throws DbException;
+
 	/**
 	 * Responds to a pending group invitation
 	 */
 	void respondToInvitation(S s, Contact c, boolean accept)
 			throws DbException;
 
+	/**
+	 * Responds to a pending group invitation
+	 */
+	void respondToInvitation(Transaction txn, S s, Contact c, boolean accept)
+			throws DbException;
+
 	/**
 	 * Responds to a pending group invitation
 	 */
 	void respondToInvitation(ContactId c, SessionId id, boolean accept)
 			throws DbException;
 
+	/**
+	 * Responds to a pending group invitation
+	 */
+	void respondToInvitation(Transaction txn, ContactId c, SessionId id,
+			boolean accept) throws DbException;
+
 	/**
 	 * Returns all invitations to groups.
 	 */
 	Collection<SharingInvitationItem> getInvitations() throws DbException;
 
+	/**
+	 * Returns all invitations to groups.
+	 */
+	Collection<SharingInvitationItem> getInvitations(Transaction txn)
+			throws DbException;
+
 	/**
 	 * Returns all contacts with whom the given group is shared.
 	 */
@@ -57,4 +82,10 @@ public interface SharingManager<S extends Shareable>
 	 */
 	boolean canBeShared(GroupId g, Contact c) throws DbException;
 
+	/**
+	 * Returns true if the group not already shared and no invitation is open
+	 */
+	boolean canBeShared(Transaction txn, GroupId g, Contact c)
+			throws DbException;
+
 }