Authentication with batoto done

app/src/main/java/eu/kanade/mangafeed/presenter/SourcePresenter.java

@@ -2,13 +2,16 @@ package eu.kanade.mangafeed.presenter;
 
 import javax.inject.Inject;
 
+import eu.kanade.mangafeed.data.helpers.PreferencesHelper;
 import eu.kanade.mangafeed.data.helpers.SourceManager;
+import eu.kanade.mangafeed.sources.base.Source;
 import eu.kanade.mangafeed.ui.fragment.SourceFragment;
 
 
 public class SourcePresenter extends BasePresenter<SourceFragment> {
 
     @Inject SourceManager sourceManager;
+    @Inject PreferencesHelper prefs;
 
     @Override
     protected void onTakeView(SourceFragment view) {
@@ -17,4 +20,11 @@ public class SourcePresenter extends BasePresenter<SourceFragment> {
         view.setItems(sourceManager.getSources());
     }
 
+    public boolean isValidSource(Source source) {
+        if (!source.isLoginRequired() || source.isLogged())
+            return true;
+
+        return !(prefs.getSourceUsername(source).equals("")
+                || prefs.getSourcePassword(source).equals(""));
+    }
 }