package nodomain.freeyourgadget.gadgetbridge.activities; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.NavUtils; import android.util.Log; import android.view.MenuItem; import android.webkit.ConsoleMessage; import android.webkit.JavascriptInterface; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Toast; import org.json.JSONException; import org.json.JSONObject; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.File; import java.io.IOException; import java.util.Iterator; import java.util.Scanner; import java.util.UUID; import nodomain.freeyourgadget.gadgetbridge.GBApplication; import nodomain.freeyourgadget.gadgetbridge.R; import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice; import nodomain.freeyourgadget.gadgetbridge.model.DeviceService; import nodomain.freeyourgadget.gadgetbridge.util.FileUtils; import nodomain.freeyourgadget.gadgetbridge.util.GB; import nodomain.freeyourgadget.gadgetbridge.util.PebbleUtils; public class ExternalPebbleJSActivity extends GBActivity { private static final Logger LOG = LoggerFactory.getLogger(ExternalPebbleJSActivity.class); private UUID appUuid; private Uri confUri; private GBDevice mGBDevice = null; private WebView myWebView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle extras = getIntent().getExtras(); if (extras != null) { mGBDevice = extras.getParcelable(GBDevice.EXTRA_DEVICE); appUuid = (UUID) extras.getSerializable(DeviceService.EXTRA_APP_UUID); } else { throw new IllegalArgumentException("Must provide a device when invoking this activity"); } setContentView(R.layout.activity_external_pebble_js); myWebView = (WebView) findViewById(R.id.configureWebview); myWebView.clearCache(true); myWebView.setWebViewClient(new GBWebClient()); myWebView.setWebChromeClient(new GBChromeClient()); WebSettings webSettings = myWebView.getSettings(); webSettings.setJavaScriptEnabled(true); //needed to access the DOM webSettings.setDomStorageEnabled(true); JSInterface gbJSInterface = new JSInterface(); myWebView.addJavascriptInterface(gbJSInterface, "GBjs"); myWebView.loadUrl("file:///android_asset/app_config/configure.html"); } @Override protected void onNewIntent(Intent incoming) { super.onNewIntent(incoming); confUri = incoming.getData(); } @Override protected void onResume() { super.onResume(); String queryString = ""; if (confUri != null) { //getting back with configuration data try { appUuid = UUID.fromString(confUri.getHost()); queryString = confUri.getEncodedQuery(); } catch (IllegalArgumentException e) { GB.toast("returned uri: " + confUri.toString(), Toast.LENGTH_LONG, GB.ERROR); } myWebView.loadUrl("file:///android_asset/app_config/configure.html?" + queryString); } } private JSONObject getAppConfigurationKeys() { try { File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache"); File configurationFile = new File(destDir, appUuid.toString() + ".json"); if (configurationFile.exists()) { String jsonstring = FileUtils.getStringFromFile(configurationFile); JSONObject json = new JSONObject(jsonstring); return json.getJSONObject("appKeys"); } } catch (IOException | JSONException e) { e.printStackTrace(); } return null; } private class GBChromeClient extends WebChromeClient { @Override public boolean onConsoleMessage(ConsoleMessage consoleMessage) { if (ConsoleMessage.MessageLevel.ERROR.equals(consoleMessage.messageLevel())) { GB.toast(consoleMessage.message(), Toast.LENGTH_LONG, GB.ERROR); //TODO: show error page } return super.onConsoleMessage(consoleMessage); } } private class GBWebClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { if (url.startsWith("http://") || url.startsWith("https://")) { Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); startActivity(i); } else { url = url.replaceFirst("^pebblejs://close#", "file:///android_asset/app_config/configure.html?config=true&json="); view.loadUrl(url); } return true; } } private class JSInterface { public JSInterface() { } @JavascriptInterface public void gbLog(String msg) { Log.d("WEBVIEW", msg); } @JavascriptInterface public void sendAppMessage(String msg) { LOG.debug("from WEBVIEW: ", msg); JSONObject knownKeys = getAppConfigurationKeys(); try { JSONObject in = new JSONObject(msg); JSONObject out = new JSONObject(); String inKey, outKey; boolean passKey = false; for (Iterator key = in.keys(); key.hasNext(); ) { passKey = false; inKey = key.next(); outKey = null; int pebbleAppIndex = knownKeys.optInt(inKey); if (pebbleAppIndex != 0) { passKey = true; outKey = String.valueOf(pebbleAppIndex); } else { //do not discard integer keys (see https://developer.pebble.com/guides/communication/using-pebblekit-js/ ) Scanner scanner = new Scanner(inKey); if (scanner.hasNextInt() && inKey.equals("" + scanner.nextInt())) { passKey = true; outKey = inKey; } } if (passKey && outKey != null) { Object obj = in.get(inKey); if (obj instanceof Boolean) { obj = ((Boolean) obj) ? "true" : "false"; } out.put(outKey, obj); } else { GB.toast("Discarded key " + inKey + ", not found in the local configuration and is not an integer key.", Toast.LENGTH_SHORT, GB.WARN); } } LOG.info(out.toString()); GBApplication.deviceService().onAppConfiguration(appUuid, out.toString()); } catch (JSONException e) { e.printStackTrace(); } } @JavascriptInterface public String getActiveWatchInfo() { JSONObject wi = new JSONObject(); try { wi.put("firmware", mGBDevice.getFirmwareVersion()); wi.put("platform", PebbleUtils.getPlatformName(mGBDevice.getHardwareVersion())); wi.put("model", PebbleUtils.getModel(mGBDevice.getHardwareVersion())); //TODO: use real info wi.put("language", "en"); } catch (JSONException e) { e.printStackTrace(); } //Json not supported apparently, we need to cast back and forth return wi.toString(); } @JavascriptInterface public String getAppConfigurationFile() { try { File destDir = new File(FileUtils.getExternalFilesDir() + "/pbw-cache"); File configurationFile = new File(destDir, appUuid.toString() + "_config.js"); if (configurationFile.exists()) { return "file:///" + configurationFile.getAbsolutePath(); } } catch (IOException e) { e.printStackTrace(); } return null; } @JavascriptInterface public String getAppUUID() { return appUuid.toString(); } @JavascriptInterface public String getWatchToken() { //specification says: A string that is 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/ return "gb" + appUuid.toString(); } @JavascriptInterface public void closeActivity() { finish(); } } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } }