Server POW should work now

app/src/main/java/ch/dissem/apps/abit/SettingsFragment.java

@@ -1,13 +1,22 @@
 package ch.dissem.apps.abit;
 
+import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Bundle;
-import android.preference.PreferenceActivity;
 import android.preference.PreferenceFragment;
+import android.preference.PreferenceManager;
+
+import ch.dissem.apps.abit.synchronization.SyncAdapter;
+
+import static ch.dissem.apps.abit.util.Constants.PREFERENCE_SERVER_POW;
+import static ch.dissem.apps.abit.util.Constants.PREFERENCE_TRUSTED_NODE;
 
 /**
- * Created by chris on 14.07.15.
+ * @author Christian Basler
  */
-public class SettingsFragment extends PreferenceFragment {
+public class SettingsFragment
+        extends PreferenceFragment
+        implements SharedPreferences.OnSharedPreferenceChangeListener {
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -15,4 +24,32 @@ public class SettingsFragment extends PreferenceFragment {
         // Load the preferences from an XML resource
         addPreferencesFromResource(R.xml.preferences);
     }
+
+    @Override
+    public void onAttach(Context ctx) {
+        super.onAttach(ctx);
+        PreferenceManager.getDefaultSharedPreferences(ctx)
+                .registerOnSharedPreferenceChangeListener(this);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        switch (key) {
+            case PREFERENCE_TRUSTED_NODE:
+                String node = sharedPreferences.getString(PREFERENCE_TRUSTED_NODE, null);
+                if (node != null) {
+                    SyncAdapter.startSync(getActivity());
+                } else {
+                    SyncAdapter.stopSync(getActivity());
+                }
+                break;
+            case PREFERENCE_SERVER_POW:
+                if (sharedPreferences.getBoolean(PREFERENCE_SERVER_POW, false)) {
+                    SyncAdapter.startPowSync(getActivity());
+                } else {
+                    SyncAdapter.stopPowSync(getActivity());
+                }
+                break;
+        }
+    }
 }