Factor out generic sharing code from ForumSharingManger

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

@@ -0,0 +1,50 @@
+package org.briarproject.api.sharing;
+
+import org.briarproject.api.contact.Contact;
+import org.briarproject.api.contact.ContactId;
+import org.briarproject.api.db.DbException;
+import org.briarproject.api.forum.Forum;
+import org.briarproject.api.forum.ForumInvitationMessage;
+import org.briarproject.api.sync.ClientId;
+import org.briarproject.api.sync.GroupId;
+
+import java.util.Collection;
+
+public interface SharingManager<S extends Shareable, IM extends InvitationMessage> {
+
+	/** Returns the unique ID of the group sharing client. */
+	ClientId getClientId();
+
+	/**
+	 * Sends an invitation to share the given group with the given contact
+	 * and sends an optional message along with it.
+	 */
+	void sendInvitation(GroupId groupId, ContactId contactId,
+			String message)	throws DbException;
+
+	/**
+	 * Responds to a pending group invitation
+	 */
+	void respondToInvitation(S s, Contact c, boolean accept)
+			throws DbException;
+
+	/**
+	 * Returns all group sharing messages sent by the Contact
+	 * identified by contactId.
+	 */
+	Collection<IM> getInvitationMessages(
+			ContactId contactId) throws DbException;
+
+	/** Returns all groups to which the user could subscribe. */
+	Collection<S> getAvailable() throws DbException;
+
+	/** Returns all contacts who are sharing the given group with us. */
+	Collection<Contact> getSharedBy(GroupId g) throws DbException;
+
+	/** Returns the IDs of all contacts with whom the given group is shared. */
+	Collection<Contact> getSharedWith(GroupId g) throws DbException;
+
+	/** Returns true if the group not already shared and no invitation is open */
+	boolean canBeShared(GroupId g, Contact c) throws DbException;
+
+}