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   1 /*
   2  * Copyright © 2021 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18 package org.altusmetrum.AltosDroid;
  19
  20 import java.io.*;
  21
  22 import org.altusmetrum.altoslib_14.*;
  23
  24 import android.content.BroadcastReceiver;
  25 import android.content.Context;
  26 import android.content.Intent;
  27 import android.content.IntentFilter;
  28 import android.os.Environment;
  29
  30 public class TelemetryLogger implements AltosLogTrace {
  31         private TelemetryService service = null;
  32         private AltosLink link    = null;
  33         private AltosLog  logger  = null;
  34
  35         private BroadcastReceiver mExternalStorageReceiver;
  36
  37         /* AltosLogTrace interface */
  38         public void trace(String format, Object ... arguments) {
  39                 AltosDebug.debug(format, arguments);
  40         }
  41
  42         public void open_failed(File file) {
  43                 service.send_file_failed_to_clients(file);
  44         }
  45
  46         public TelemetryLogger(TelemetryService in_service, AltosLink in_link) {
  47                 service = in_service;
  48                 link    = in_link;
  49
  50                 startWatchingExternalStorage();
  51         }
  52
  53         public void stop() {
  54                 stopWatchingExternalStorage();
  55                 close();
  56         }
  57
  58         private void close() {
  59                 if (logger != null) {
  60                         AltosDebug.debug("Shutting down Telemetry Logging");
  61                         logger.close();
  62                         logger = null;
  63                 }
  64         }
  65
  66         void handleExternalStorageState() {
  67                 String state = Environment.getExternalStorageState();
  68                 if (Environment.MEDIA_MOUNTED.equals(state)) {
  69                         if (logger == null) {
  70                                 AltosDebug.debug("Starting up Telemetry Logging");
  71                                 logger = new AltosLog(link,this);
  72                         }
  73                 } else {
  74                         AltosDebug.debug("External Storage not present - stopping");
  75                         close();
  76                 }
  77         }
  78
  79         void startWatchingExternalStorage() {
  80                 mExternalStorageReceiver = new BroadcastReceiver() {
  81                         @Override
  82                         public void onReceive(Context context, Intent intent) {
  83                                 handleExternalStorageState();
  84                         }
  85                 };
  86                 IntentFilter filter = new IntentFilter();
  87                 filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
  88                 filter.addAction(Intent.ACTION_MEDIA_REMOVED);
  89                 service.registerReceiver(mExternalStorageReceiver, filter);
  90                 handleExternalStorageState();
  91         }
  92
  93         void stopWatchingExternalStorage() {
  94                 service.unregisterReceiver(mExternalStorageReceiver);
  95         }
  96
  97 }