Add pref to enable expert mode (fixes #256) (#328)

* Add prefs: verbose_log, expert_mode

* Update prefs in Constants

* Add service.AppPrefs

* Update fragments to read verbose log pref

* Update classes with context or inject to read verbose log pref

* Inherit ENABLE_VERBOSE_LOG from RestApi to Completion

* Restart whole app if verbose log pref was changed

* A line too much

* Revert expert mode pref (DELTA REVERT)

* Add expert mode pref (ref #256)

* Make ignoreDelete an expert option

* Make pullOrder and ignoreDelete expert options

* Make deviceCompression an expert option

* Import de translation

app/src/main/java/com/nutomic/syncthingandroid/activities/DeviceActivity.java

@@ -276,6 +276,10 @@ public class DeviceActivity extends SyncthingActivity {
             getWindow().setSoftInputMode(SOFT_INPUT_STATE_ALWAYS_HIDDEN);
             mNameView.requestFocus();
         }
+
+        // Show expert options conditionally.
+        Boolean prefExpertMode = mPreferences.getBoolean(Constants.PREF_EXPERT_MODE, false);
+        mCompressionContainer.setVisibility(prefExpertMode ? View.VISIBLE : View.GONE);
     }
 
     private void restoreDialogStates(Bundle savedInstanceState) {

app/src/main/java/com/nutomic/syncthingandroid/activities/FolderActivity.java

@@ -107,11 +107,13 @@ public class FolderActivity extends SyncthingActivity {
     private SwitchCompat mCustomSyncConditionsSwitch;
     private TextView mCustomSyncConditionsDescription;
     private TextView mCustomSyncConditionsDialog;
+    private ViewGroup mPullOrderContainer;
     private TextView mPullOrderTypeView;
     private TextView mPullOrderDescriptionView;
     private TextView mVersioningDescriptionView;
     private TextView mVersioningTypeView;
     private SwitchCompat mVariableSizeBlocks;
+    private ViewGroup mIgnoreDeleteContainer;
     private SwitchCompat mIgnoreDelete;
     private TextView mEditIgnoreListTitle;
     private EditText mEditIgnoreListContent;
@@ -208,11 +210,13 @@ public class FolderActivity extends SyncthingActivity {
         mCustomSyncConditionsSwitch = findViewById(R.id.customSyncConditionsSwitch);
         mCustomSyncConditionsDescription = findViewById(R.id.customSyncConditionsDescription);
         mCustomSyncConditionsDialog = findViewById(R.id.customSyncConditionsDialog);
+        mPullOrderContainer = findViewById(R.id.pullOrderContainer);
         mPullOrderTypeView = findViewById(R.id.pullOrderType);
         mPullOrderDescriptionView = findViewById(R.id.pullOrderDescription);
         mVersioningDescriptionView = findViewById(R.id.versioningDescription);
         mVersioningTypeView = findViewById(R.id.versioningType);
         mVariableSizeBlocks = findViewById(R.id.variableSizeBlocks);
+        mIgnoreDeleteContainer = findViewById(R.id.ignoreDeleteContainer);
         mIgnoreDelete = findViewById(R.id.ignoreDelete);
         mDevicesContainer = findViewById(R.id.devicesContainer);
         mEditIgnoreListTitle = findViewById(R.id.edit_ignore_list_title);
@@ -222,7 +226,7 @@ public class FolderActivity extends SyncthingActivity {
         mCustomSyncConditionsDialog.setOnClickListener(view -> onCustomSyncConditionsDialogClick());
 
         findViewById(R.id.folderTypeContainer).setOnClickListener(v -> showFolderTypeDialog());
-        findViewById(R.id.pullOrderContainer).setOnClickListener(v -> showPullOrderDialog());
+        mPullOrderContainer.setOnClickListener(v -> showPullOrderDialog());
         findViewById(R.id.versioningContainer).setOnClickListener(v -> showVersioningDialog());
 
         if (savedInstanceState != null) {
@@ -282,6 +286,11 @@ public class FolderActivity extends SyncthingActivity {
         checkWriteAndUpdateUI();
         updateViewsAndSetListeners();
 
+        // Show expert options conditionally.
+        Boolean prefExpertMode = mPreferences.getBoolean(Constants.PREF_EXPERT_MODE, false);
+        mPullOrderContainer.setVisibility(prefExpertMode ? View.VISIBLE : View.GONE);
+        mIgnoreDeleteContainer.setVisibility(prefExpertMode ? View.VISIBLE : View.GONE);
+
         // Open keyboard on label view in edit mode.
         mLabelView.requestFocus();
     }

app/src/main/java/com/nutomic/syncthingandroid/service/Constants.java

@@ -33,6 +33,8 @@ public class Constants {
     public static final String PREF_SUGGEST_NEW_FOLDER_ROOT_DATA    = "external_android_data";
     public static final String PREF_SUGGEST_NEW_FOLDER_ROOT_MEDIA   = "external_android_media";
 
+    public static final String PREF_EXPERT_MODE                     = "expert_mode";
+
     // Preferences - Troubleshooting
     public static final String PREF_VERBOSE_LOG                 = "verbose_log";
     public static final String PREF_ENVIRONMENT_VARIABLES       = "environment_variables";

app/src/main/res/values-de/strings.xml

@@ -465,6 +465,10 @@ Bitte melden Sie auftretende Probleme via GitHub.</string>
         <item>[Ext_Speicher]/Android/media</item>
     </string-array>
 
+    <string name="expert_mode_title">Expertenmodus</string>
+
+    <string name="expert_mode_summary">Durch Aktivieren dieser Option werden erweiterte Konfigurationsoptionen angezeigt. Du solltest Dir zuerst die Syncthing-Dokumentation ansehen, um sicherzustellen, dass Du weißt, wie sie richtig verwendet werden. Falsche Einstellungen können zu hohem Batterieverbrauch, Erschöpfung der Systemressourcen oder unvollständiger Synchronisation führen.</string>
+
     <string name="preference_language_title">Sprache</string>
 
     <string name="preference_language_summary">Anwendungssprache ändern</string>

app/src/main/res/values/strings.xml

@@ -468,6 +468,10 @@ Please report any problems you encounter via Github.</string>
         <item>[external_storage]/Android/media</item>
     </string-array>
 
+    <string name="expert_mode_title">Expert mode</string>
+
+    <string name="expert_mode_summary">Enabling this option will show advanced configuration options. You should have a look at the Syncthing Docs first to make sure you know how to use them correctly. Incorrect settings may cause battery drain, system resource exhaust or incomplete synchronization.</string>
+
     <string name="preference_language_title">Language</string>
 
     <string name="preference_language_summary">Change the app language</string>

app/src/main/res/xml/app_settings.xml

@@ -100,6 +100,13 @@
             android:summary="@null"
             android:defaultValue="external_android_data" />
 
+        <!-- Expert mode -->
+        <CheckBoxPreference
+            android:key="expert_mode"
+            android:title="@string/expert_mode_title"
+            android:summary="@string/expert_mode_summary"
+            android:defaultValue="false" />
+
         <ListPreference
             android:key="pref_current_language"
             android:title="@string/preference_language_title"