Java tutorial
/* * Cos android client for Cozy Cloud * * Copyright (C) 2016 Hamza Abdelkebir * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package eu.codeplumbers.cosi.services; import android.app.IntentService; import android.app.NotificationManager; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.v4.content.WakefulBroadcastReceiver; import android.support.v7.app.NotificationCompat; import android.util.Base64; import android.util.Log; import com.activeandroid.query.Delete; import org.apache.commons.io.IOUtils; import org.greenrobot.eventbus.EventBus; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.StringWriter; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.ProtocolException; import java.net.URL; import java.util.List; import eu.codeplumbers.cosi.R; import eu.codeplumbers.cosi.db.models.Device; import eu.codeplumbers.cosi.db.models.Expense; import eu.codeplumbers.cosi.db.models.Receipt; import eu.codeplumbers.cosi.services.events.ExpenseSyncEvent; import static eu.codeplumbers.cosi.utils.Constants.REFRESH; import static eu.codeplumbers.cosi.utils.Constants.SERVICE_ERROR; import static eu.codeplumbers.cosi.utils.Constants.SYNC_MESSAGE; /** * Created by thor on 10/29/16. */ public class CosiExpenseService extends IntentService { private String authHeader; private String designUrl; private String syncUrl; private int notification_id = 1376; private NotificationManager mNotifyManager; private NotificationCompat.Builder mBuilder; private boolean mSyncRunning; private boolean stopSync; private String errorMessage; public CosiExpenseService() { super("CosiExpenseService"); mSyncRunning = false; } public CosiExpenseService(String name) { super(name); } @Override protected void onHandleIntent(Intent intent) { // Do the task here Log.i(CosiExpenseService.class.getName(), "Cosi Service running"); // Release the wake lock provided by the WakefulBroadcastReceiver. WakefulBroadcastReceiver.completeWakefulIntent(intent); // delete local expenses new Delete().from(Receipt.class).execute(); new Delete().from(Expense.class).execute(); Device device = Device.registeredDevice(); // cozy register device url designUrl = device.getUrl() + "/ds-api/request/expense/all/"; syncUrl = device.getUrl() + "/ds-api/data/"; // concatenate username and password with colon for authentication final String credentials = device.getLogin() + ":" + device.getPassword(); authHeader = "Basic " + Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP); showNotification(); if (isNetworkAvailable()) { try { EventBus.getDefault().post(new ExpenseSyncEvent(SYNC_MESSAGE, "Getting expenses from Cozy...")); getRemoteExpenses(); mNotifyManager.cancel(notification_id); sendChangesToCozy(); EventBus.getDefault().post(new ExpenseSyncEvent(REFRESH, "Sync OK")); } catch (Exception e) { e.printStackTrace(); mSyncRunning = false; EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); } } else { mSyncRunning = false; EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, "No Internet connection")); mBuilder.setContentText("Sync failed because no Internet connection was available"); mNotifyManager.notify(notification_id, mBuilder.build()); } } /** * Make remote request to get all loyalty cards stored in Cozy */ public String getRemoteExpenses() { URL urlO = null; try { urlO = new URL(designUrl); HttpURLConnection conn = (HttpURLConnection) urlO.openConnection(); conn.setConnectTimeout(5000); conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8"); conn.setRequestProperty("Authorization", authHeader); conn.setDoInput(true); conn.setRequestMethod("POST"); // read the response int status = conn.getResponseCode(); InputStream in = null; if (status >= HttpURLConnection.HTTP_BAD_REQUEST) { in = conn.getErrorStream(); } else { in = conn.getInputStream(); } StringWriter writer = new StringWriter(); IOUtils.copy(in, writer, "UTF-8"); String result = writer.toString(); JSONArray jsonArray = new JSONArray(result); if (jsonArray != null) { if (jsonArray.length() == 0) { EventBus.getDefault() .post(new ExpenseSyncEvent(SYNC_MESSAGE, "Your Cozy has no expenses stored.")); Expense.setAllUnsynced(); } else { for (int i = 0; i < jsonArray.length(); i++) { try { EventBus.getDefault().post(new ExpenseSyncEvent(SYNC_MESSAGE, "Reading expenses on Cozy " + i + "/" + jsonArray.length() + "...")); JSONObject expenseJson = jsonArray.getJSONObject(i).getJSONObject("value"); Expense expense = Expense.getByRemoteId(expenseJson.get("_id").toString()); if (expense == null) { expense = new Expense(expenseJson); } else { expense.setRemoteId(expenseJson.getString("_id")); expense.setAmount(expenseJson.getDouble("amount")); expense.setCategory(expenseJson.getString("category")); expense.setDate(expenseJson.getString("date")); if (expenseJson.has("deviceId")) { expense.setDeviceId(expenseJson.getString("deviceId")); } else { expense.setDeviceId(Device.registeredDevice().getLogin()); } } expense.save(); if (expenseJson.has("receipts")) { JSONArray receiptsArray = expenseJson.getJSONArray("receipts"); for (int j = 0; j < receiptsArray.length(); j++) { JSONObject recJsonObject = receiptsArray.getJSONObject(i); Receipt receipt = new Receipt(); receipt.setBase64(recJsonObject.getString("base64")); receipt.setExpense(expense); receipt.setName(""); receipt.save(); } } } catch (JSONException e) { EventBus.getDefault() .post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); stopSelf(); } } } } else { errorMessage = new JSONObject(result).getString("error"); EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, errorMessage)); stopSelf(); } in.close(); conn.disconnect(); } catch (MalformedURLException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); stopSelf(); } catch (ProtocolException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); stopSelf(); } catch (IOException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); stopSelf(); } catch (JSONException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); stopSelf(); } return errorMessage; } public void sendChangesToCozy() { List<Expense> unSyncedExpenses = Expense.getAllUnsynced(); int i = 0; for (Expense expense : unSyncedExpenses) { URL urlO = null; try { JSONObject jsonObject = expense.toJsonObject(); mBuilder.setProgress(unSyncedExpenses.size(), i + 1, false); mBuilder.setContentText("Syncing " + jsonObject.getString("docType") + ":"); mNotifyManager.notify(notification_id, mBuilder.build()); EventBus.getDefault().post( new ExpenseSyncEvent(SYNC_MESSAGE, getString(R.string.lbl_expense_status_read_phone))); String remoteId = jsonObject.getString("remoteId"); String requestMethod = ""; if (remoteId.isEmpty()) { urlO = new URL(syncUrl); requestMethod = "POST"; } else { urlO = new URL(syncUrl + remoteId + "/"); requestMethod = "PUT"; } HttpURLConnection conn = (HttpURLConnection) urlO.openConnection(); conn.setConnectTimeout(5000); conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8"); conn.setRequestProperty("Authorization", authHeader); conn.setDoOutput(true); conn.setDoInput(true); conn.setRequestMethod(requestMethod); // set request body jsonObject.remove("remoteId"); long objectId = jsonObject.getLong("id"); jsonObject.remove("id"); OutputStream os = conn.getOutputStream(); os.write(jsonObject.toString().getBytes("UTF-8")); os.flush(); // read the response InputStream in = new BufferedInputStream(conn.getInputStream()); StringWriter writer = new StringWriter(); IOUtils.copy(in, writer, "UTF-8"); String result = writer.toString(); JSONObject jsonObjectResult = new JSONObject(result); if (jsonObjectResult != null && jsonObjectResult.has("_id")) { result = jsonObjectResult.getString("_id"); expense.setRemoteId(result); expense.save(); } in.close(); conn.disconnect(); } catch (MalformedURLException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); e.printStackTrace(); stopSelf(); } catch (ProtocolException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); e.printStackTrace(); stopSelf(); } catch (IOException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); e.printStackTrace(); stopSelf(); } catch (JSONException e) { EventBus.getDefault().post(new ExpenseSyncEvent(SERVICE_ERROR, e.getLocalizedMessage())); e.printStackTrace(); stopSelf(); } i++; } } private boolean isNetworkAvailable() { ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService( Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo(); return activeNetworkInfo != null && activeNetworkInfo.isConnected(); } public void showNotification() { mNotifyManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); mBuilder = new NotificationCompat.Builder(this); mBuilder.setContentTitle(getString(R.string.lbl_expenses)) .setContentText(getString(R.string.lbl_contacts_ongoing_sync)).setSmallIcon(R.drawable.ic_fa_file) .setOngoing(true); } }