Lock TrustKeys if no trusted keys are available

src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java

@@ -281,6 +281,10 @@ public class AxolotlService {
 			return mXmppConnectionService.databaseBackend.loadIdentityKeys(account, bareJid, Trust.UNDECIDED);
 		}
 
+		public long getContactNumTrustedKeys(String bareJid) {
+			return mXmppConnectionService.databaseBackend.numTrustedKeys(account, bareJid);
+		}
+
 		// --------------------------------------
 		// SessionStore
 		// --------------------------------------
@@ -672,6 +676,10 @@ public class AxolotlService {
 		return axolotlStore.getContactUndecidedKeys(contact.getJid().toBareJid().toString());
 	}
 
+	public long getNumTrustedKeys(Contact contact) {
+		return axolotlStore.getContactNumTrustedKeys(contact.getJid().toBareJid().toString());
+	}
+
 	private AxolotlAddress getAddressForJid(Jid jid) {
 		return new AxolotlAddress(jid.toString(), 0);
 	}

src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java

@@ -3,6 +3,7 @@ package eu.siacs.conversations.persistance;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
+import android.database.DatabaseUtils;
 import android.database.sqlite.SQLiteCantOpenDatabaseException;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
@@ -858,6 +859,19 @@ public class DatabaseBackend extends SQLiteOpenHelper {
 		return identityKeys;
 	}
 
+	public long numTrustedKeys(Account account, String name) {
+		SQLiteDatabase db = getReadableDatabase();
+		String[] args = {
+				account.getUuid(),
+				name
+		};
+		return DatabaseUtils.queryNumEntries(db, AxolotlService.SQLiteAxolotlStore.IDENTITIES_TABLENAME,
+				AxolotlService.SQLiteAxolotlStore.ACCOUNT + " = ?"
+				+ " AND " + AxolotlService.SQLiteAxolotlStore.NAME + " = ?",
+				args
+		);
+	}
+
 	private void storeIdentityKey(Account account, String name, boolean own, String fingerprint, String base64Serialized) {
 		storeIdentityKey(account, name, own, fingerprint, base64Serialized, AxolotlService.SQLiteAxolotlStore.Trust.UNDECIDED);
 	}

src/main/java/eu/siacs/conversations/ui/TrustKeysActivity.java

@@ -27,6 +27,8 @@ import eu.siacs.conversations.xmpp.jid.Jid;
 public class TrustKeysActivity extends XmppActivity implements OnNewKeysAvailable {
 	private Jid accountJid;
 	private Jid contactJid;
+	private boolean hasOtherTrustedKeys = false;
+	private boolean hasPendingFetches = false;
 
 	private Contact contact;
 	private TextView ownKeysTitle;
@@ -153,6 +155,17 @@ public class TrustKeysActivity extends XmppActivity implements OnNewKeysAvailabl
 			foreignKeysTitle.setText(contactJid.toString());
 			foreignKeysCard.setVisibility(View.VISIBLE);
 		}
+		if(hasPendingFetches) {
+			setFetching();
+			lock();
+		} else {
+			if (!hasOtherTrustedKeys && !foreignKeysToTrust.values().contains(true)){
+				lock();
+			} else {
+				unlock();
+			}
+			setDone();
+		}
 	}
 
 	private void getFingerprints(final Account account) {
@@ -183,9 +196,12 @@ public class TrustKeysActivity extends XmppActivity implements OnNewKeysAvailabl
 			foreignKeysToTrust.clear();
 			getFingerprints(account);
 
+			if(account.getAxolotlService().getNumTrustedKeys(contact) > 0) {
+				hasOtherTrustedKeys = true;
+			}
 			Conversation conversation = xmppConnectionService.findOrCreateConversation(account, contactJid, false);
 			if(account.getAxolotlService().hasPendingKeyFetches(conversation)) {
-				lock();
+				hasPendingFetches = true;
 			}
 
 			populateView();
@@ -199,7 +215,7 @@ public class TrustKeysActivity extends XmppActivity implements OnNewKeysAvailabl
 			public void run() {
 				final Account account = xmppConnectionService
 						.findAccountByJid(accountJid);
-				unlock();
+				hasPendingFetches = false;
 				getFingerprints(account);
 				refreshUi();
 			}
@@ -221,13 +237,19 @@ public class TrustKeysActivity extends XmppActivity implements OnNewKeysAvailabl
 
 	private void unlock() {
 		mSaveButton.setEnabled(true);
-		mSaveButton.setText(getString(R.string.done));
 		mSaveButton.setTextColor(getPrimaryTextColor());
 	}
 
 	private void lock() {
 		mSaveButton.setEnabled(false);
-		mSaveButton.setText(getString(R.string.fetching_keys));
 		mSaveButton.setTextColor(getSecondaryTextColor());
 	}
+
+	private void setDone() {
+		mSaveButton.setText(getString(R.string.done));
+	}
+
+	private void setFetching() {
+		mSaveButton.setText(getString(R.string.fetching_keys));
+	}
 }