1 files changed, 91 insertions, 0 deletions
diff --git a/app/src/main/java/com/wireguard/android/preference/ModuleDownloaderPreference.java b/app/src/main/java/com/wireguard/android/preference/ModuleDownloaderPreference.java
new file mode 100644
index 00000000..a04bed76
--- /dev/null
+++ b/app/src/main/java/com/wireguard/android/preference/ModuleDownloaderPreference.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright © 2019 WireGuard LLC. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.wireguard.android.preference;
+
+import android.content.Context;
+import android.content.Intent;
+import android.system.OsConstants;
+import android.util.AttributeSet;
+import android.widget.Toast;
+
+import com.wireguard.android.Application;
+import com.wireguard.android.R;
+import com.wireguard.android.util.ModuleLoader;
+import com.wireguard.android.util.ToolsInstaller;
+
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+
+public class ModuleDownloaderPreference extends Preference {
+    private State state = State.INITIAL;
+
+    public ModuleDownloaderPreference(final Context context, final AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return getContext().getString(state.messageResourceId);
+    }
+
+    @Override
+    public CharSequence getTitle() {
+        return getContext().getString(R.string.module_installer_title);
+    }
+
+    @Override
+    protected void onClick() {
+        setState(State.WORKING);
+        Application.getAsyncWorker().supplyAsync(Application.getModuleLoader()::download).whenComplete(this::onDownloadResult);
+    }
+
+    private void onDownloadResult(final Integer result, @Nullable final Throwable throwable) {
+        if (throwable != null) {
+            setState(State.FAILURE);
+            Toast.makeText(getContext(), throwable.getMessage(), Toast.LENGTH_LONG).show();
+        } else if (result == OsConstants.ENOENT)
+            setState(State.NOTFOUND);
+        else if (result == OsConstants.EXIT_SUCCESS) {
+            setState(State.SUCCESS);
+            Application.getAsyncWorker().runAsync(() -> {
+                Thread.sleep(1000 * 5);
+                Intent i = getContext().getPackageManager().getLaunchIntentForPackage(getContext().getPackageName());
+                if (i == null)
+                    return;
+                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                Application.get().startActivity(i);
+                System.exit(0);
+            });
+        } else
+            setState(State.FAILURE);
+    }
+
+    private void setState(final State state) {
+        if (this.state == state)
+            return;
+        this.state = state;
+        if (isEnabled() != state.shouldEnableView)
+            setEnabled(state.shouldEnableView);
+        notifyChanged();
+    }
+
+    private enum State {
+        INITIAL(R.string.module_installer_initial, true),
+        FAILURE(R.string.module_installer_error, true),
+        WORKING(R.string.module_installer_working, false),
+        SUCCESS(R.string.module_installer_success, false),
+        NOTFOUND(R.string.module_installer_not_found, false);
+
+        private final int messageResourceId;
+        private final boolean shouldEnableView;
+
+        State(final int messageResourceId, final boolean shouldEnableView) {
+            this.messageResourceId = messageResourceId;
+            this.shouldEnableView = shouldEnableView;
+        }
+    }
+}