1 files changed, 129 insertions, 0 deletions
diff --git a/ui/src/main/java/com/wireguard/android/activity/SettingsActivity.java b/ui/src/main/java/com/wireguard/android/activity/SettingsActivity.java
new file mode 100644
index 00000000..f545c371
--- /dev/null
+++ b/ui/src/main/java/com/wireguard/android/activity/SettingsActivity.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.activity;
+
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Bundle;
+import androidx.annotation.Nullable;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceScreen;
+import android.util.SparseArray;
+import android.view.MenuItem;
+
+import com.wireguard.android.Application;
+import com.wireguard.android.R;
+import com.wireguard.android.backend.WgQuickBackend;
+import com.wireguard.android.util.ModuleLoader;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Interface for changing application-global persistent settings.
+ */
+
+public class SettingsActivity extends ThemeChangeAwareActivity {
+    private final SparseArray<PermissionRequestCallback> permissionRequestCallbacks = new SparseArray<>();
+    private int permissionRequestCounter;
+
+    public void ensurePermissions(final String[] permissions, final PermissionRequestCallback cb) {
+        final List<String> needPermissions = new ArrayList<>(permissions.length);
+        for (final String permission : permissions) {
+            if (ContextCompat.checkSelfPermission(this, permission)
+                    != PackageManager.PERMISSION_GRANTED)
+                needPermissions.add(permission);
+        }
+        if (needPermissions.isEmpty()) {
+            final int[] granted = new int[permissions.length];
+            Arrays.fill(granted, PackageManager.PERMISSION_GRANTED);
+            cb.done(permissions, granted);
+            return;
+        }
+        final int idx = permissionRequestCounter++;
+        permissionRequestCallbacks.put(idx, cb);
+        ActivityCompat.requestPermissions(this,
+                needPermissions.toArray(new String[needPermissions.size()]), idx);
+    }
+
+    @Override
+    protected void onCreate(@Nullable final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
+            getSupportFragmentManager().beginTransaction()
+                    .add(android.R.id.content, new SettingsFragment())
+                    .commit();
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(final MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                finish();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(final int requestCode,
+                                           final String[] permissions,
+                                           final int[] grantResults) {
+        final PermissionRequestCallback f = permissionRequestCallbacks.get(requestCode);
+        if (f != null) {
+            permissionRequestCallbacks.remove(requestCode);
+            f.done(permissions, grantResults);
+        }
+    }
+
+    public interface PermissionRequestCallback {
+        void done(String[] permissions, int[] grantResults);
+    }
+
+    public static class SettingsFragment extends PreferenceFragmentCompat {
+        @Override
+        public void onCreatePreferences(final Bundle savedInstanceState, final String key) {
+            addPreferencesFromResource(R.xml.preferences);
+            final PreferenceScreen screen = getPreferenceScreen();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
+                screen.removePreference(getPreferenceManager().findPreference("dark_theme"));
+
+            final Preference wgQuickOnlyPrefs[] = {
+                    getPreferenceManager().findPreference("tools_installer"),
+                    getPreferenceManager().findPreference("restore_on_boot")
+            };
+            for (final Preference pref : wgQuickOnlyPrefs)
+                pref.setVisible(false);
+            Application.getBackendAsync().thenAccept(backend -> {
+                for (final Preference pref : wgQuickOnlyPrefs) {
+                    if (backend instanceof WgQuickBackend)
+                        pref.setVisible(true);
+                    else
+                        screen.removePreference(pref);
+                }
+            });
+
+            final Preference moduleInstaller = getPreferenceManager().findPreference("module_downloader");
+            moduleInstaller.setVisible(false);
+            if (ModuleLoader.isModuleLoaded()) {
+                screen.removePreference(moduleInstaller);
+            } else {
+                Application.getAsyncWorker().runAsync(Application.getRootShell()::start).whenComplete((v, e) -> {
+                    if (e == null)
+                        moduleInstaller.setVisible(true);
+                    else
+                        screen.removePreference(moduleInstaller);
+                });
+            }
+        }
+    }
+}