Streamline SyncthingRunnable

Conflicts:
	src/androidTest/java/com/nutomic/syncthingandroid/test/syncthing/RestApiTest.java
	src/main/java/com/nutomic/syncthingandroid/fragments/SettingsFragment.java
	src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingRunnable.java
	src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingService.java
	src/main/res/values/strings.xml

src/androidTest/java/com/nutomic/syncthingandroid/test/syncthing/PollWebGuiAvailableTaskTest.java

@@ -30,8 +30,7 @@ public class PollWebGuiAvailableTaskTest extends AndroidTestCase {
     }
 
     public void testPolling() throws InterruptedException {
-        new SyncthingRunnable(new MockContext(null),
-                getContext().getApplicationInfo().dataDir + "/" + SyncthingService.BINARY_NAME);
+        mSyncthing = new SyncthingRunnable(new MockContext(null), SyncthingRunnable.Command.main);
 
         String httpsCertPath = getContext().getFilesDir() + "/" + SyncthingService.HTTPS_CERT_FILE;
 

src/androidTest/java/com/nutomic/syncthingandroid/test/syncthing/RestApiTest.java

@@ -23,8 +23,7 @@ public class RestApiTest extends AndroidTestCase {
     protected void setUp() throws Exception {
         super.setUp();
 
-        new SyncthingRunnable(new MockContext(null),
-                getContext().getApplicationInfo().dataDir + "/" + SyncthingService.BINARY_NAME);
+        mSyncthing = new SyncthingRunnable(new MockContext(null), SyncthingRunnable.Command.main);
 
         ConfigXml config = new ConfigXml(new MockContext(getContext()));
         config.changeDefaultFolder();

src/androidTest/java/com/nutomic/syncthingandroid/test/syncthing/SyncthingRunnableTest.java

@@ -17,9 +17,9 @@ public class SyncthingRunnableTest extends AndroidTestCase {
     @SmallTest
     public void testRunning() throws InterruptedException {
         MockContext context = new MockContext(getContext());
-        File testFile = new File(context.getFilesDir(), "was_running");
+        File testFile = new File(context.getFilesDir(), SyncthingRunnable.UNIT_TEST_PATH);
         assertFalse(testFile.exists());
-        // Inject a differenct command instead of the syncthing binary for testing.
+        // Inject a different command instead of the Syncthing binary for testing.
         new SyncthingRunnable(context, "touch " + testFile.getAbsolutePath() + "; exit\n").run();
         assertTrue(testFile.exists());
         testFile.delete();

src/main/java/com/nutomic/syncthingandroid/fragments/SettingsFragment.java

@@ -37,6 +37,7 @@ public class SettingsFragment extends PreferenceFragment
     private static final String EXPORT_CONFIG         = "export_config";
     private static final String IMPORT_CONFIG         = "import_config";
     private static final String STTRACE               = "sttrace";
+    private static final String SYNCTHING_RESET       = "streset";
 
     private static final String SYNCTHING_VERSION_KEY = "syncthing_version";
 
@@ -139,12 +140,13 @@ public class SettingsFragment extends PreferenceFragment
         mSyncOnlyWifi.setOnPreferenceChangeListener(this);
         screen.findPreference(EXPORT_CONFIG).setOnPreferenceClickListener(this);
         screen.findPreference(IMPORT_CONFIG).setOnPreferenceClickListener(this);
+        screen.findPreference(SYNCTHING_RESET).setOnPreferenceClickListener(this);
         user.setOnPreferenceChangeListener(this);
         password.setOnPreferenceChangeListener(this);
-        // Force summary update and wifi/charging preferences enable/disable.
-        onPreferenceChange(mAlwaysRunInBackground, mAlwaysRunInBackground.isChecked());
         sttrace.setOnPreferenceChangeListener(this);
 
+        // Force summary update and wifi/charging preferences enable/disable.
+        onPreferenceChange(mAlwaysRunInBackground, mAlwaysRunInBackground.isChecked());
         SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
         user.setSummary(sp.getString("gui_user", ""));
         sttrace.setSummary(sp.getString("sttrace", ""));
@@ -272,6 +274,9 @@ public class SettingsFragment extends PreferenceFragment
                             SyncthingService.EXPORT_PATH), Toast.LENGTH_LONG).show();
                 }
                 return true;
+            case SYNCTHING_RESET:
+                ((SyncthingActivity) getActivity()).getApi().resetSyncthing(getActivity());
+                return true;
             default:
                 return false;
         }

src/main/java/com/nutomic/syncthingandroid/syncthing/RestApi.java

@@ -379,6 +379,33 @@ public class RestApi implements SyncthingService.OnWebGuiAvailableListener,
                 .show();
     }
 
+    /**
+     * Reset Syncthing's indexes when confirmed by a dialog.
+     */
+    @TargetApi(11)
+    public void resetSyncthing(final Activity activity) {
+        final Intent intent = new Intent(mContext, SyncthingService.class)
+                .setAction(SyncthingService.ACTION_RESET);
+
+        AlertDialog.Builder builder = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
+                ? new AlertDialog.Builder(activity, AlertDialog.THEME_HOLO_LIGHT)
+                : new AlertDialog.Builder(activity);
+        builder.setTitle(R.string.streset_title);
+        builder.setMessage(R.string.streset_question)
+                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialogInterface, int i) {
+                        mContext.startService(intent);
+                        Toast.makeText(activity, R.string.streset_done, Toast.LENGTH_LONG).show();
+                    }
+                })
+                .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialogInterface, int i) { }
+                })
+                .show();
+    }
+
     /**
      * Creates a notification prompting the user to restart the app.
      */

src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingRunnable.java

@@ -27,18 +27,52 @@ public class SyncthingRunnable implements Runnable {
 
     private static final String TAG_NATIVE = "SyncthingNativeCode";
 
+    public static final String UNIT_TEST_PATH = "was running";
+
     private final Context mContext;
 
+    private boolean mGenerate;
+
     private String mCommand;
 
+    public enum Command {
+        generate, // Generate keys, a config file and immediately exit.
+        main,     // Run the main Syncthing application.
+        reset,    // Reset Syncthing's indexes
+    }
+
     /**
      * Constructs instance.
      *
-     * @param command The exact command to be executed on the shell.
+     * @param command Which type of Syncthing command to execute.
      */
-    public SyncthingRunnable(Context context, String command) {
+    public SyncthingRunnable(Context context, Command command) {
         mContext = context;
-        mCommand = command;
+        String syncthing = mContext.getApplicationInfo().dataDir + "/" + SyncthingService.BINARY_NAME;
+        switch (command) {
+            case generate:
+                mCommand = syncthing + " -generate='" + mContext.getFilesDir() + "' -no-browser";
+                break;
+            case main:
+                mCommand = syncthing + " -home='" + mContext.getFilesDir() + "' -no-browser";
+                break;
+            case reset:
+                mCommand = syncthing + " -home='" + mContext.getFilesDir() + "' -reset";
+                break;
+            default:
+                Log.w(TAG, "Unknown command option");
+                mCommand = "";
+        }
+    }
+
+    /**
+     * Constructs instance.
+     *
+     * @param manualCommand The exact command to be executed on the shell. Used for tests only.
+     */
+    public SyncthingRunnable(Context context, String manualCommand) {
+        mContext = context;
+        mCommand = manualCommand;
     }
 
     @Override
@@ -48,7 +82,7 @@ public class SyncthingRunnable implements Runnable {
         int ret = 1;
         Process process = null;
         try {
-            // Loop to handle syncthing restarts (these always have an error code of 3).
+            // Loop to handle Syncthing restarts (these always have an error code of 3).
             do {
                 ProcessBuilder pb = new ProcessBuilder("sh");
                 Map<String, String> env = pb.environment();
@@ -62,9 +96,13 @@ public class SyncthingRunnable implements Runnable {
                 process = pb.start();
 
                 dos = new DataOutputStream(process.getOutputStream());
-                // Call syncthing with -home (as it would otherwise use "~/.config/syncthing/".
-                dos.writeBytes(mCommand + " -home " + mContext.getFilesDir() + "\n");
-                dos.writeBytes("exit\n");
+                // Set (Android) home directory to data folder for syncthing to use.
+                dos.writeBytes("HOME=" + Environment.getExternalStorageDirectory() + " ");
+                dos.writeBytes("STTRACE=" + pm.getString("sttrace", "") + " ");
+                dos.writeBytes("STNORESTART=1 ");
+                dos.writeBytes("STNOUPGRADE=1 ");
+                dos.writeBytes(mCommand);
+                dos.writeBytes("\nexit\n");
                 dos.flush();
 
                 log(process.getInputStream(), Log.INFO);

src/main/java/com/nutomic/syncthingandroid/syncthing/SyncthingService.java

@@ -45,10 +45,16 @@ public class SyncthingService extends Service {
     private static final String TAG = "SyncthingService";
 
     /**
-     * Intent action to perform a syncthing restart.
+     * Intent action to perform a Syncthing restart.
      */
     public static final String ACTION_RESTART = "restart";
 
+    /**
+     * Intent action to reset Syncthing's database.
+     */
+    public static final String ACTION_RESET = "reset";
+
+
     /**
      * Interval in ms at which the GUI is updated (eg {@link com.nutomic.syncthingandroid.fragments.DrawerFragment}).
      */
@@ -150,8 +156,12 @@ public class SyncthingService extends Service {
             mApi.shutdown();
             mCurrentState = State.INIT;
             updateState();
-        }
-        else if (mCurrentState != State.INIT) {
+        } else if (ACTION_RESET.equals(intent.getAction())) {
+            mApi.shutdown();
+            new SyncthingRunnable(this, SyncthingRunnable.Command.reset).run();
+            mCurrentState = State.INIT;
+            updateState();
+        } else if (mCurrentState != State.INIT) {
             mDeviceStateHolder.update(intent);
             updateState();
         }
@@ -200,8 +210,7 @@ public class SyncthingService extends Service {
             mCurrentState = State.STARTING;
             registerOnWebGuiAvailableListener(mApi);
             new PollWebGuiAvailableTaskImpl(getFilesDir() + "/" + HTTPS_CERT_FILE).execute(mConfig.getWebGuiUrl());
-            new Thread(new SyncthingRunnable(
-                    this, getApplicationInfo().dataDir + "/" + BINARY_NAME)).start();
+            new Thread(new SyncthingRunnable(this, SyncthingRunnable.Command.main)).start();
             Notification n = new NotificationCompat.Builder(this)
                     .setContentTitle(getString(R.string.syncthing_active))
                     .setSmallIcon(R.drawable.ic_stat_notify)

src/main/java/com/nutomic/syncthingandroid/util/ConfigXml.java

@@ -78,9 +78,7 @@ public class ConfigXml {
     }
 
     private void generateKeysConfig(Context context) {
-        new SyncthingRunnable(context, context.getApplicationInfo().dataDir + "/" +
-                SyncthingService.BINARY_NAME + " -generate='" + context.getFilesDir() + "'")
-                .run();
+        new SyncthingRunnable(context, SyncthingRunnable.Command.generate).run();
     }
 
     public static File getConfigFile(Context context) {

src/main/res/values/strings.xml

@@ -286,6 +286,17 @@ Please report any problems you encounter via Github.</string>
     <!-- Toast after entering invalid password -->
     <string name="toast_invalid_password">Characters : and \' are not allowed in password</string>
 
+    <!-- Title for the preference to reset Syncthing indexes -->
+    <string name="streset_title">Reset Database</string>
+
+    <!-- Syncthing was reset -->
+    <string name="streset_question">This action should only be performed based on a recommendation from our support team.
+        \nAre you sure you want to clear Syncthing\'s index database?
+    </string>
+
+    <!-- Syncthing was reset -->
+    <string name="streset_done">Successfully reset Syncthing\'s database</string>
+
     <string name="category_about">About</string>
 
     <!-- Settings item that opens the log activity -->

src/main/res/xml/app_settings.xml

@@ -115,6 +115,11 @@
             android:title="@string/sttrace_title"
             android:singleLine="true" />
 
+        <Preference
+            android:key="streset"
+            android:title="@string/streset_title"
+            android:singleLine="true" />
+
     </PreferenceCategory>
 
     <PreferenceCategory