app/src/main/java/net/ktnx/mobileledger/RetrieveAccountsTask.java

   1 package net.ktnx.mobileledger;
   2
   3 import android.content.SharedPreferences;
   4 import android.database.sqlite.SQLiteDatabase;
   5 import android.util.Log;
   6
   7 import java.io.BufferedReader;
   8 import java.io.IOException;
   9 import java.io.InputStream;
  10 import java.io.InputStreamReader;
  11 import java.net.HttpURLConnection;
  12 import java.net.MalformedURLException;
  13 import java.net.URLDecoder;
  14 import java.util.regex.Matcher;
  15 import java.util.regex.Pattern;
  16
  17 abstract public class RetrieveAccountsTask extends android.os.AsyncTask<SQLiteDatabase, Integer, Void> {
  18     int error;
  19
  20     private SharedPreferences pref;
  21     public void setPref(SharedPreferences pref) {
  22         this.pref = pref;
  23     }
  24     public RetrieveAccountsTask() {
  25         error = 0;
  26     }
  27
  28     protected Void doInBackground(SQLiteDatabase... sqLiteDatabases) {
  29         final SQLiteDatabase db = sqLiteDatabases[0];
  30         try {
  31             HttpURLConnection http = NetworkUtil.prepare_connection( pref, "add");
  32             http.setAllowUserInteraction(false);
  33             http.setRequestProperty("Accept-Charset", "UTF-8");
  34             publishProgress(0);
  35             InputStream resp = http.getInputStream();
  36             try {
  37                 Log.d("update_accounts", String.valueOf(http.getResponseCode()));
  38                 if (http.getResponseCode() != 200) {
  39                     throw new IOException(String.valueOf(R.string.err_http_error));
  40                 }
  41                 else {
  42                     db.beginTransaction();
  43                     db.execSQL("delete from accounts;");
  44
  45                     try {
  46                         String line;
  47                         BufferedReader buf = new BufferedReader(new InputStreamReader(resp, "UTF-8"));
  48                         // %3A is '='
  49                         Pattern re = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  50                         int count = 0;
  51                         while ((line = buf.readLine()) != null) {
  52                             Matcher m = re.matcher(line);
  53                             while (m.find()) {
  54                                 String acct_encoded = m.group(1);
  55                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
  56                                 acct_name = acct_name.replace("\"", "");
  57                                 Log.d("account-parser", acct_name);
  58
  59                                 db.execSQL("insert into accounts(name) values(?)", new Object[]{acct_name} );
  60                                 publishProgress(++count);
  61                             }
  62                         }
  63
  64                         db.setTransactionSuccessful();
  65                     }
  66                     finally {
  67                         db.endTransaction();
  68                     }
  69
  70                 }
  71             }
  72             finally {
  73                 resp.close();
  74             }
  75         } catch (MalformedURLException e) {
  76             error = R.string.err_bad_backend_url;
  77             e.printStackTrace();
  78         } catch (IOException e) {
  79             error = R.string.err_net_io_error;
  80             e.printStackTrace();
  81         }
  82         catch (Exception e) {
  83             error = R.string.err_net_error;
  84             e.printStackTrace();
  85         }
  86
  87         return null;
  88     }
  89
  90     abstract protected void onProgressUpdate(Integer... values);
  91
  92     abstract protected void onPostExecute(Void result);
  93 }