103 lines
3.4 KiB
Java
103 lines
3.4 KiB
Java
/*
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* Copyright © 2018 Samuel Holland <samuel@sholland.org>
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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package com.wireguard.android.preference;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import android.support.v7.preference.Preference;
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import android.system.OsConstants;
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import android.util.AttributeSet;
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import com.wireguard.android.Application;
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import com.wireguard.android.Application.ApplicationComponent;
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import com.wireguard.android.R;
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import com.wireguard.android.util.AsyncWorker;
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import com.wireguard.android.util.ToolsInstaller;
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/**
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* Preference implementing a button that asynchronously runs {@code ToolsInstaller} and displays the
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* result as the preference summary.
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*/
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public class ToolsInstallerPreference extends Preference {
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private final AsyncWorker asyncWorker;
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private final ToolsInstaller toolsInstaller;
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private State state = State.INITIAL;
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@SuppressWarnings({"SameParameterValue", "WeakerAccess"})
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public ToolsInstallerPreference(final Context context, final AttributeSet attrs) {
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super(context, attrs);
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final ApplicationComponent applicationComponent = Application.getComponent();
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asyncWorker = applicationComponent.getAsyncWorker();
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toolsInstaller = applicationComponent.getToolsInstaller();
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}
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@Override
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public CharSequence getSummary() {
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return getContext().getString(state.messageResourceId);
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}
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@Override
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public CharSequence getTitle() {
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return getContext().getString(R.string.tools_installer_title);
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}
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@Override
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public void onAttached() {
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super.onAttached();
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asyncWorker.supplyAsync(toolsInstaller::areInstalled).whenComplete(this::onCheckResult);
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}
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private void onCheckResult(final Integer result, final Throwable throwable) {
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setState(throwable == null && result == OsConstants.EALREADY ?
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State.ALREADY : State.INITIAL);
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}
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@Override
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protected void onClick() {
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setState(State.WORKING);
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asyncWorker.supplyAsync(toolsInstaller::install).whenComplete(this::onInstallResult);
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}
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private void onInstallResult(final Integer result, final Throwable throwable) {
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final State nextState;
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if (throwable != null)
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nextState = State.FAILURE;
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else if (result == OsConstants.EXIT_SUCCESS)
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nextState = State.SUCCESS;
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else if (result == OsConstants.EALREADY)
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nextState = State.ALREADY;
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else
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nextState = State.FAILURE;
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setState(nextState);
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}
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private void setState(@NonNull final State state) {
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if (this.state == state)
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return;
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this.state = state;
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if (isEnabled() != state.shouldEnableView)
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setEnabled(state.shouldEnableView);
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notifyChanged();
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}
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private enum State {
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ALREADY(R.string.tools_installer_already, false),
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FAILURE(R.string.tools_installer_failure, true),
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INITIAL(R.string.tools_installer_initial, true),
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SUCCESS(R.string.tools_installer_success, false),
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WORKING(R.string.tools_installer_working, false);
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private final int messageResourceId;
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private final boolean shouldEnableView;
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State(final int messageResourceId, final boolean shouldEnableView) {
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this.messageResourceId = messageResourceId;
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this.shouldEnableView = shouldEnableView;
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}
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}
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}
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