added warning lable if server doesn't support pubsub. refactored feature identification into seperate class

res/values/strings.xml

@@ -276,4 +276,5 @@
     <string name="error_publish_avatar_converting">Something went wrong while converting your picture</string>
     <string name="error_saving_avatar">Could not save avatar to disk</string>
     <string name="or_long_press_for_default">(Or long press to bring back default)</string>
+    <string name="error_publish_avatar_no_server_support">Your server does not support the publication of avatars</string>
 </resources>

src/eu/siacs/conversations/ui/ManageAccountActivity.java

@@ -184,7 +184,7 @@ public class ManageAccountActivity extends XmppActivity {
 						connection.setText(connectionAge + " "
 								+ getString(R.string.mins));
 					}
-					if (xmpp.hasFeatureStreamManagment()) {
+					if (xmpp.getFeatures().sm()) {
 						if (sessionAgeHours >= 2) {
 							session.setText(sessionAgeHours + " "
 									+ getString(R.string.hours));
@@ -197,12 +197,12 @@ public class ManageAccountActivity extends XmppActivity {
 						stream.setText(getString(R.string.no));
 						session.setText(connection.getText());
 					}
-					if (xmpp.hasFeaturesCarbon()) {
+					if (xmpp.getFeatures().carbons()) {
 						carbon.setText(getString(R.string.yes));
 					} else {
 						carbon.setText(getString(R.string.no));
 					}
-					if (xmpp.hasFeatureRosterManagment()) {
+					if (xmpp.getFeatures().rosterVersioning()) {
 						roster.setText(getString(R.string.yes));
 					} else {
 						roster.setText(getString(R.string.no));

src/eu/siacs/conversations/ui/PublishProfilePictureActivity.java

@@ -33,6 +33,8 @@ public class PublishProfilePictureActivity extends XmppActivity {
 
 	private Account account;
 	
+	private boolean support = false;
+
 	private UiCallback<Avatar> avatarPublication = new UiCallback<Avatar>() {
 
 		@Override
@@ -148,6 +150,9 @@ public class PublishProfilePictureActivity extends XmppActivity {
 			String jid = getIntent().getStringExtra("account");
 			if (jid != null) {
 				this.account = xmppConnectionService.findAccountByJid(jid);
+				if (this.account.getXmppConnection() != null) {
+					this.support = this.account.getXmppConnection().getFeatures().pubsub();
+				}
 				if (this.avatarUri == null) {
 					if (this.account.getAvatar() != null) {
 						this.avatar.setImageBitmap(this.account.getImage(
@@ -173,10 +178,16 @@ public class PublishProfilePictureActivity extends XmppActivity {
 		Bitmap bm = xmppConnectionService.getFileBackend().cropCenterSquare(
 				uri, 384);
 		this.avatar.setImageBitmap(bm);
-		enablePublishButton();
-		this.publishButton.setText(R.string.publish_avatar);
-		this.hintOrWarning.setText(R.string.publish_avatar_explanation);
-		this.hintOrWarning.setTextColor(getPrimaryTextColor());
+		if (support) {
+			enablePublishButton();
+			this.publishButton.setText(R.string.publish_avatar);
+			this.hintOrWarning.setText(R.string.publish_avatar_explanation);
+			this.hintOrWarning.setTextColor(getPrimaryTextColor());
+		} else {
+			disablePublishButton();
+			this.hintOrWarning.setTextColor(getWarningTextColor());
+			this.hintOrWarning.setText(R.string.error_publish_avatar_no_server_support);
+		}
 		if (this.defaultUri != null && uri.equals(this.defaultUri)) {
 			this.secondaryHint.setVisibility(View.INVISIBLE);
 			this.avatar.setOnLongClickListener(null);

src/eu/siacs/conversations/xmpp/XmppConnection.java

@@ -65,6 +65,8 @@ public class XmppConnection implements Runnable {
 	private XmlReader tagReader;
 	private TagWriter tagWriter;
 	
+	private Features features = new Features(this);
+
 	private boolean shouldBind = true;
 	private boolean shouldAuthenticate = true;
 	private Element streamFeatures;
@@ -662,7 +664,7 @@ public class XmppConnection implements Runnable {
 	}
 
 	private void enableAdvancedStreamFeatures() {
-		if (hasFeaturesCarbon()) {
+		if (getFeatures().carbons()) {
 			sendEnableCarbons();
 		}
 	}
@@ -833,33 +835,6 @@ public class XmppConnection implements Runnable {
 		}
 	}
 
-	public boolean hasFeatureRosterManagment() {
-		if (this.streamFeatures == null) {
-			return false;
-		} else {
-			return this.streamFeatures.hasChild("ver");
-		}
-	}
-
-	public boolean hasFeatureStreamManagment() {
-		if (this.streamFeatures == null) {
-			return false;
-		} else {
-			return this.streamFeatures.hasChild("sm");
-		}
-	}
-
-	public boolean hasFeaturesCarbon() {
-		return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
-	}
-
-	public boolean hasDiscoFeature(String server, String feature) {
-		if (!disco.containsKey(server)) {
-			return false;
-		}
-		return disco.get(server).contains(feature);
-	}
-
 	public List<String> findDiscoItemsByFeature(String feature) {
 		List<String> items = new ArrayList<String>();
 		for (Entry<String, List<String>> cursor : disco.entrySet()) {
@@ -903,4 +878,46 @@ public class XmppConnection implements Runnable {
 	public int getAttempt() {
 		return this.attempt;
 	}
+	
+	public Features getFeatures() {
+		return this.features;
+	}
+	
+	public class Features {
+		XmppConnection connection;
+		public Features(XmppConnection connection) {
+			this.connection = connection;
+		}
+		
+		private boolean hasDiscoFeature(String server, String feature) {
+			if (!connection.disco.containsKey(server)) {
+				return false;
+			}
+			return connection.disco.get(server).contains(feature);
+		}
+		
+		public boolean carbons() {
+			return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
+		}
+		
+		public boolean sm() {
+			if (connection.streamFeatures == null) {
+				return false;
+			} else {
+				return connection.streamFeatures.hasChild("sm");
+			}
+		}
+		
+		public boolean pubsub() {
+			return hasDiscoFeature(account.getServer(), "http://jabber.org/protocol/pubsub#publish");
+		}
+		
+		public boolean rosterVersioning() {
+			if (connection.streamFeatures == null) {
+				return false;
+			} else {
+				return connection.streamFeatures.hasChild("ver");
+			}
+		}
+	}
 }