mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge.git
synced 2025-01-15 03:21:13 +01:00
c9cfaa9bd8
The support within JS is a bit hacky and sometimes conflicts with the configuration page.
406 lines
16 KiB
Java
406 lines
16 KiB
Java
package nodomain.freeyourgadget.gadgetbridge.util;
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import android.app.Activity;
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import android.content.Context;
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import android.content.Intent;
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import android.content.MutableContextWrapper;
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import android.net.Uri;
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import android.os.Build;
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import android.os.Handler;
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import android.os.Looper;
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import android.webkit.ConsoleMessage;
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import android.webkit.JavascriptInterface;
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import android.webkit.ValueCallback;
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import android.webkit.WebChromeClient;
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import android.webkit.WebResourceRequest;
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import android.webkit.WebResourceResponse;
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import android.webkit.WebSettings;
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import android.webkit.WebView;
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import android.webkit.WebViewClient;
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import android.widget.Toast;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.io.Writer;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Scanner;
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import java.util.UUID;
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import nodomain.freeyourgadget.gadgetbridge.GBApplication;
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import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
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public class WebViewSingleton extends Activity {
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private static final Logger LOG = LoggerFactory.getLogger(WebViewSingleton.class);
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private static WebView instance = null;
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private static JSInterface jsInterface;
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private static MutableContextWrapper contextWrapper = null;
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private WebViewSingleton() {
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}
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public static WebView getorInitWebView(Context context, GBDevice device, UUID uuid) {
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if (context instanceof Activity) {
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if (contextWrapper != null) {
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contextWrapper.setBaseContext(context);
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} else {
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contextWrapper = new MutableContextWrapper(context);
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}
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if (instance == null) {
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instance = new WebView(contextWrapper);
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new Handler(Looper.getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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instance.setWillNotDraw(true);
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instance.clearCache(true);
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instance.setWebViewClient(new GBWebClient());
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instance.setWebChromeClient(new GBChromeClient());
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instance.setWebContentsDebuggingEnabled(true);
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WebSettings webSettings = instance.getSettings();
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webSettings.setJavaScriptEnabled(true);
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//needed to access the DOM
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webSettings.setDomStorageEnabled(true);
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//needed for localstorage
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webSettings.setDatabaseEnabled(true);
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if (jsInterface != null) {
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LOG.debug("Attaching the existing jsInterface to the new webview instance");
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instance.addJavascriptInterface(jsInterface, "GBjs");
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instance.loadUrl("file:///android_asset/app_config/configure.html");
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}
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}
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});
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}
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} else {
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LOG.debug("WEBV: not using the passed context, as it is not an activity");
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}
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if (jsInterface == null || (jsInterface != null && (!device.equals(jsInterface.device) || !uuid.equals(jsInterface.mUuid)))) {
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jsInterface = new JSInterface(device, uuid);
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new Handler(Looper.getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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if (instance != null) {
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instance.removeJavascriptInterface("GBjs");
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instance.addJavascriptInterface(jsInterface, "GBjs");
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instance.loadUrl("file:///android_asset/app_config/configure.html");
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}
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}
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});
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} else {
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LOG.debug("Not replacing the JS in the webview. JS uuid " + jsInterface.mUuid.toString());
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}
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return instance;
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}
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public static void appMessage(final String message) {
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final String appMessage = jsInterface.parseIncomingAppMessage(message);
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LOG.debug("to WEBVIEW: " + appMessage);
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new Handler(Looper.getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
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instance.evaluateJavascript("Pebble.evaluate('appmessage',[" + appMessage + "]);", new ValueCallback<String>() {
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@Override
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public void onReceiveValue(String s) {
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LOG.debug("Callback from showConfiguration", s);
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}
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});
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} else {
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instance.loadUrl("javascript:Pebble.evaluate('appmessage',[" + appMessage + "]);");
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}
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}
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});
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}
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public static void disposeWebView() {
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new Handler(Looper.getMainLooper()).post(new Runnable() {
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@Override
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public void run() {
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if (instance != null) {
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instance.setWebChromeClient(null);
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instance.setWebViewClient(null);
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instance.clearHistory();
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instance.clearCache(true);
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instance.loadUrl("about:blank");
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instance.freeMemory();
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instance.pauseTimers();
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instance.destroy();
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instance = null;
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contextWrapper = null;
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jsInterface = null;
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}
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}
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});
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}
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private static class GBChromeClient extends WebChromeClient {
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@Override
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public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
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if (ConsoleMessage.MessageLevel.ERROR.equals(consoleMessage.messageLevel())) {
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GB.toast(consoleMessage.message(), Toast.LENGTH_LONG, GB.ERROR);
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//TODO: show error page
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}
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return super.onConsoleMessage(consoleMessage);
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}
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}
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private static class GBWebClient extends WebViewClient {
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@Override
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public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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LOG.debug("WEBVIEW shouldInterceptRequest URL" + request.getUrl());
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}
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LOG.debug("WEBVIEW request:" + request.toString());
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return super.shouldInterceptRequest(view, request);
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}
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@Override
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public boolean shouldOverrideUrlLoading(WebView view, String url) {
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if (url.startsWith("http://") || url.startsWith("https://")) {
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Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
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i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
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contextWrapper.startActivity(i);
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} else {
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url = url.replaceFirst("^pebblejs://close#", "file:///android_asset/app_config/configure.html?config=true&json=");
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view.loadUrl(url);
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}
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return true;
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}
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}
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private static JSONObject getAppConfigurationKeys(UUID uuid) {
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try {
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File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache");
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File configurationFile = new File(destDir, uuid.toString() + ".json");
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if (configurationFile.exists()) {
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String jsonstring = FileUtils.getStringFromFile(configurationFile);
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JSONObject json = new JSONObject(jsonstring);
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return json.getJSONObject("appKeys");
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}
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} catch (IOException | JSONException e) {
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e.printStackTrace();
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}
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return null;
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}
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private static class JSInterface {
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UUID mUuid;
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GBDevice device;
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public JSInterface(GBDevice device, UUID mUuid) {
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LOG.debug("Creating JS interface for UUID: " + mUuid.toString());
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this.device = device;
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this.mUuid = mUuid;
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}
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public String parseIncomingAppMessage(String msg) {
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JSONObject jsAppMessage = new JSONObject();
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JSONObject knownKeys = getAppConfigurationKeys(this.mUuid);
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HashMap<Integer, String> appKeysMap = new HashMap<Integer, String>();
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String inKey, outKey;
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//knownKeys contains "name"->"index", we need to reverse that
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for (Iterator<String> key = knownKeys.keys(); key.hasNext(); ) {
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inKey = key.next();
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appKeysMap.put(knownKeys.optInt(inKey), inKey);
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}
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try {
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JSONArray incoming = new JSONArray(msg);
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JSONObject outgoing = new JSONObject();
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for (int i = 0; i < incoming.length(); i++) {
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JSONObject in = incoming.getJSONObject(i);
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outKey = null;
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Object outValue = null;
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for (Iterator<String> key = in.keys(); key.hasNext(); ) {
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inKey = key.next();
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switch (inKey) {
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case "key":
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outKey = appKeysMap.get(in.optInt(inKey));
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break;
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case "value":
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outValue = in.get(inKey);
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}
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}
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if (outKey != null && outValue != null) {
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outgoing.put(outKey, outValue);
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}
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}
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jsAppMessage.put("payload", outgoing);
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} catch (JSONException e) {
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e.printStackTrace();
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}
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return jsAppMessage.toString();
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}
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@JavascriptInterface
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public void gbLog(String msg) {
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LOG.debug("WEBVIEW", msg);
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}
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@JavascriptInterface
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public void sendAppMessage(String msg) {
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LOG.debug("from WEBVIEW: " + msg);
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JSONObject knownKeys = getAppConfigurationKeys(this.mUuid);
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try {
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JSONObject in = new JSONObject(msg);
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JSONObject out = new JSONObject();
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String inKey, outKey;
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boolean passKey;
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for (Iterator<String> key = in.keys(); key.hasNext(); ) {
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passKey = false;
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inKey = key.next();
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outKey = null;
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int pebbleAppIndex = knownKeys.optInt(inKey, -1);
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if (pebbleAppIndex != -1) {
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passKey = true;
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outKey = String.valueOf(pebbleAppIndex);
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} else {
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//do not discard integer keys (see https://developer.pebble.com/guides/communication/using-pebblekit-js/ )
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Scanner scanner = new Scanner(inKey);
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if (scanner.hasNextInt() && inKey.equals("" + scanner.nextInt())) {
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passKey = true;
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outKey = inKey;
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}
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}
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if (passKey) {
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Object obj = in.get(inKey);
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if (obj instanceof Boolean) {
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obj = ((Boolean) obj) ? "true" : "false";
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}
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out.put(outKey, obj);
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} else {
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GB.toast("Discarded key " + inKey + ", not found in the local configuration and is not an integer key.", Toast.LENGTH_SHORT, GB.WARN);
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}
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}
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LOG.info("WEBV:" + out.toString());
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GBApplication.deviceService().onAppConfiguration(this.mUuid, out.toString());
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} catch (JSONException e) {
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e.printStackTrace();
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}
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}
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@JavascriptInterface
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public String getActiveWatchInfo() {
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JSONObject wi = new JSONObject();
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try {
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wi.put("firmware", device.getFirmwareVersion());
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wi.put("platform", PebbleUtils.getPlatformName(device.getModel()));
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wi.put("model", PebbleUtils.getModel(device.getModel()));
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//TODO: use real info
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wi.put("language", "en");
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} catch (JSONException e) {
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e.printStackTrace();
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}
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//Json not supported apparently, we need to cast back and forth
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return wi.toString();
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}
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@JavascriptInterface
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public String getAppConfigurationFile() {
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try {
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File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache");
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File configurationFile = new File(destDir, this.mUuid.toString() + "_config.js");
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if (configurationFile.exists()) {
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return "file:///" + configurationFile.getAbsolutePath();
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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return null;
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}
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@JavascriptInterface
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public String getAppStoredPreset() {
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try {
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File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache");
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File configurationFile = new File(destDir, this.mUuid.toString() + "_preset.json");
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if (configurationFile.exists()) {
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return FileUtils.getStringFromFile(configurationFile);
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}
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} catch (IOException e) {
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GB.toast("Error reading presets", Toast.LENGTH_LONG, GB.ERROR);
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e.printStackTrace();
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}
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return null;
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}
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@JavascriptInterface
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public void saveAppStoredPreset(String msg) {
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Writer writer;
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try {
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File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache");
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File presetsFile = new File(destDir, this.mUuid.toString() + "_preset.json");
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writer = new BufferedWriter(new FileWriter(presetsFile));
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writer.write(msg);
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writer.close();
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GB.toast("Presets stored", Toast.LENGTH_SHORT, GB.INFO);
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} catch (IOException e) {
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GB.toast("Error storing presets", Toast.LENGTH_LONG, GB.ERROR);
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e.printStackTrace();
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}
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}
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@JavascriptInterface
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public String getAppUUID() {
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return this.mUuid.toString();
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}
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@JavascriptInterface
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public String getAppLocalstoragePrefix() {
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String prefix = device.getAddress() + this.mUuid.toString();
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try {
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MessageDigest digest = MessageDigest.getInstance("SHA-1");
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byte[] bytes = prefix.getBytes("UTF-8");
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digest.update(bytes, 0, bytes.length);
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bytes = digest.digest();
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final StringBuilder sb = new StringBuilder();
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for (int i = 0; i < bytes.length; i++) {
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sb.append(String.format("%02X", bytes[i]));
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}
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return sb.toString().toLowerCase();
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} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
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e.printStackTrace();
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return prefix;
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}
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}
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@JavascriptInterface
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public String getWatchToken() {
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//specification says: A string that is guaranteed to be identical for each Pebble device for the same app across different mobile devices. The token is unique to your app and cannot be used to track Pebble devices across applications. see https://developer.pebble.com/docs/js/Pebble/
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return "gb" + this.mUuid.toString();
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}
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}
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}
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