UI for Sharing Blogs

This commit refactors the code for sharing forums,
so it can be used for sharing blogs as well.

It does not yet include code for responding to blog invitations.

briar-core/src/org/briarproject/sharing/BlogSharingManagerImpl.java

@@ -12,6 +12,7 @@ import org.briarproject.api.clients.ClientHelper;
 import org.briarproject.api.clients.MessageQueueManager;
 import org.briarproject.api.clients.PrivateGroupFactory;
 import org.briarproject.api.clients.SessionId;
+import org.briarproject.api.contact.Contact;
 import org.briarproject.api.contact.ContactId;
 import org.briarproject.api.data.BdfDictionary;
 import org.briarproject.api.data.BdfList;
@@ -47,6 +48,8 @@ class BlogSharingManagerImpl extends
 			"bee438b5de0b3a685badc4e49d76e72d"
 					+ "21e01c4b569a775112756bdae267a028"));
 
+	private final BlogManager blogManager;
+
 	private final SFactory sFactory;
 	private final IFactory iFactory;
 	private final ISFactory isFactory;
@@ -64,6 +67,7 @@ class BlogSharingManagerImpl extends
 		super(db, messageQueueManager, clientHelper, metadataParser,
 				metadataEncoder, random, privateGroupFactory, clock);
 
+		this.blogManager = blogManager;
 		sFactory = new SFactory(authorFactory, blogFactory, blogManager);
 		iFactory = new IFactory();
 		isFactory = new ISFactory();
@@ -77,6 +81,13 @@ class BlogSharingManagerImpl extends
 		return CLIENT_ID;
 	}
 
+	@Override
+	public boolean canBeShared(GroupId g, Contact c) throws DbException {
+		Blog b = blogManager.getPersonalBlog(c.getAuthor());
+		if (b.getId().equals(g)) return false;
+		return super.canBeShared(g, c);
+	}
+
 	@Override
 	protected BlogInvitationRequest createInvitationRequest(MessageId id,
 			BlogInvitation msg, ContactId contactId, boolean available,

briar-core/src/org/briarproject/sharing/SharingModule.java

@@ -27,6 +27,8 @@ public class SharingModule {
 		ForumSharingValidator forumSharingValidator;
 		@Inject
 		ForumSharingManager forumSharingManager;
+		@Inject
+		BlogSharingManager blogSharingManager;
 	}
 
 	@Provides