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

   1 package net.ktnx.mobileledger;
   2
   3 import android.content.SharedPreferences;
   4 import android.util.Log;
   5
   6 import java.io.BufferedReader;
   7 import java.io.IOException;
   8 import java.io.InputStream;
   9 import java.io.InputStreamReader;
  10 import java.net.HttpURLConnection;
  11 import java.net.MalformedURLException;
  12 import java.net.URLDecoder;
  13 import java.util.regex.Matcher;
  14 import java.util.regex.Pattern;
  15
  16 import static net.ktnx.mobileledger.MobileLedgerDB.db;
  17
  18 abstract public class RetrieveAccountsTask extends android.os.AsyncTask<Void, Integer, Void> {
  19     int error;
  20
  21     private SharedPreferences pref;
  22
  23     RetrieveAccountsTask() {
  24         error = 0;
  25     }
  26
  27     void setPref(SharedPreferences pref) {
  28         this.pref = pref;
  29     }
  30
  31     protected Void doInBackground(Void... params) {
  32         try {
  33             HttpURLConnection http = NetworkUtil.prepare_connection( pref, "add");
  34             http.setAllowUserInteraction(false);
  35             http.setRequestProperty("Accept-Charset", "UTF-8");
  36             publishProgress(0);
  37             InputStream resp = http.getInputStream();
  38             try {
  39                 Log.d("update_accounts", String.valueOf(http.getResponseCode()));
  40                 if (http.getResponseCode() != 200) {
  41                     throw new IOException(String.format("HTTP error: %d %s", http.getResponseCode(), http.getResponseMessage()));
  42                 }
  43                 else {
  44                     if (db.inTransaction()) throw new AssertionError();
  45
  46                     db.beginTransaction();
  47
  48                     try {
  49                         db.execSQL("update account_values set keep=0;");
  50                         db.execSQL("update accounts set keep=0;");
  51
  52                         String line;
  53                         String last_account_name = null;
  54                         BufferedReader buf = new BufferedReader(new InputStreamReader(resp, "UTF-8"));
  55                         // %3A is '='
  56                         Pattern account_name_re = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  57                         Pattern value_re = Pattern.compile("<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  58                         Pattern tr_re = Pattern.compile("</tr>");
  59                         Pattern descriptions_line_re = Pattern.compile("\\bdescriptionsSuggester\\s*=\\s*new\\b");
  60                         Pattern description_items_re = Pattern.compile("\"value\":\"([^\"]+)\"");
  61                         int count = 0;
  62                         while ((line = buf.readLine()) != null) {
  63                             Matcher m = account_name_re.matcher(line);
  64                             if (m.find()) {
  65                                 String acct_encoded = m.group(1);
  66                                 String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
  67                                 acct_name = acct_name.replace("\"", "");
  68                                 Log.d("account-parser", acct_name);
  69
  70                                 db.execSQL("insert or replace into accounts(name, keep) values(?, 1)", new Object[]{acct_name} );
  71                                 publishProgress(++count);
  72
  73                                 last_account_name = acct_name;
  74
  75                                 continue;
  76                             }
  77
  78                             Matcher tr_m = tr_re.matcher(line);
  79                             if (tr_m.find()) {
  80                                 Log.d("account-parser", "<tr> - another account expected");
  81                                 last_account_name = null;
  82                                 continue;
  83                             }
  84
  85                             if (last_account_name != null) {
  86                                 m = value_re.matcher(line);
  87                                 boolean match_found = false;
  88                                 while (m.find()) {
  89                                     match_found = true;
  90                                     String value = m.group(1);
  91                                     String currency = m.group(2);
  92                                     if (currency == null) currency = "";
  93                                     value = value.replace(',', '.');
  94                                     Log.d("db", "curr=" + currency + ", value=" + value);
  95                                     db.execSQL("insert or replace into account_values(account, currency, value, keep) values(?, ?, ?, 1);",
  96                                             new Object[]{last_account_name, currency, Float.valueOf(value)});
  97                                 }
  98
  99                                 if (match_found) continue;
 100                             }
 101
 102                             m = descriptions_line_re.matcher(line);
 103                             if (m.find()) {
 104                                 db.execSQL("update description_history set keep=0;");
 105                                 m = description_items_re.matcher(line);
 106                                 while(m.find()) {
 107                                     String description = m.group(1);
 108                                     if (description.isEmpty()) continue;
 109
 110                                     Log.d("db", String.format("Stored description: %s", description));
 111                                     db.execSQL("insert or replace into description_history(description, keep) values(?, 1);", new Object[]{description});
 112                                 }
 113                             }
 114                         }
 115
 116                         db.execSQL("delete from account_values where keep=0;");
 117                         db.execSQL("delete from accounts where keep=0;");
 118 //                        db.execSQL("delete from description_history where keep=0;");
 119                         db.setTransactionSuccessful();
 120                     }
 121                     finally {
 122                         db.endTransaction();
 123                     }
 124
 125                 }
 126             }
 127             finally {
 128                 resp.close();
 129             }
 130         } catch (MalformedURLException e) {
 131             error = R.string.err_bad_backend_url;
 132             e.printStackTrace();
 133         } catch (IOException e) {
 134             error = R.string.err_net_io_error;
 135             e.printStackTrace();
 136         }
 137         catch (Exception e) {
 138             error = R.string.err_net_error;
 139             e.printStackTrace();
 140         }
 141
 142         return null;
 143     }
 144
 145     abstract protected void onProgressUpdate(Integer... values);
 146
 147     abstract protected void onPostExecute(Void result);
 148 }