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

   1 /*
   2  * Copyright © 2018 Damyan Ivanov.
   3  * This file is part of Mobile-Ledger.
   4  * Mobile-Ledger is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * Mobile-Ledger is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Mobile-Ledger. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.async;
  19
  20 import android.content.SharedPreferences;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.util.Log;
  23
  24 import net.ktnx.mobileledger.AccountSummary;
  25 import net.ktnx.mobileledger.R;
  26 import net.ktnx.mobileledger.model.LedgerAccount;
  27 import net.ktnx.mobileledger.utils.MLDB;
  28 import net.ktnx.mobileledger.utils.NetworkUtil;
  29
  30 import java.io.BufferedReader;
  31 import java.io.FileNotFoundException;
  32 import java.io.IOException;
  33 import java.io.InputStream;
  34 import java.io.InputStreamReader;
  35 import java.lang.ref.WeakReference;
  36 import java.net.HttpURLConnection;
  37 import java.net.MalformedURLException;
  38 import java.net.URLDecoder;
  39 import java.util.regex.Matcher;
  40 import java.util.regex.Pattern;
  41
  42 public class RetrieveAccountsTask extends android.os.AsyncTask<Void, Integer, Void> {
  43     int error;
  44
  45     private SharedPreferences pref;
  46     WeakReference<AccountSummary> mContext;
  47
  48     public RetrieveAccountsTask(WeakReference<AccountSummary> context) {
  49         mContext = context;
  50         error = 0;
  51     }
  52
  53     public void setPref(SharedPreferences pref) {
  54         this.pref = pref;
  55     }
  56
  57     protected Void doInBackground(Void... params) {
  58         try {
  59             HttpURLConnection http = NetworkUtil.prepare_connection( pref, "add");
  60             publishProgress(0);
  61             try (SQLiteDatabase db = MLDB.getDatabase(mContext.get(), MLDB.DatabaseMode.WRITE)) {
  62                     try (InputStream resp = http.getInputStream()) {
  63                         Log.d("update_accounts", String.valueOf(http.getResponseCode()));
  64                         if (http.getResponseCode() != 200) {
  65                             throw new IOException(
  66                                     String.format("HTTP error: %d %s", http.getResponseCode(), http.getResponseMessage()));
  67                         }
  68                         else {
  69                             if (db.inTransaction()) throw new AssertionError();
  70
  71                             db.beginTransaction();
  72
  73                             try {
  74                                 db.execSQL("update account_values set keep=0;");
  75                                 db.execSQL("update accounts set keep=0;");
  76
  77                                 String line;
  78                                 String last_account_name = null;
  79                                 BufferedReader buf =
  80                                         new BufferedReader(new InputStreamReader(resp, "UTF-8"));
  81                                 // %3A is '='
  82                                 Pattern account_name_re = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  83                                 Pattern value_re = Pattern.compile(
  84                                         "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  85                                 Pattern tr_re = Pattern.compile("</tr>");
  86                                 Pattern descriptions_line_re = Pattern.compile("\\bdescriptionsSuggester\\s*=\\s*new\\b");
  87                                 Pattern description_items_re = Pattern.compile("\"value\":\"([^\"]+)\"");
  88                                 int count = 0;
  89                                 while ((line = buf.readLine()) != null) {
  90                                     Matcher m = account_name_re.matcher(line);
  91                                     if (m.find()) {
  92                                         String acct_encoded = m.group(1);
  93                                         String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
  94                                         acct_name = acct_name.replace("\"", "");
  95                                         Log.d("account-parser", acct_name);
  96
  97                                         addAccount(db, acct_name);
  98                                         publishProgress(++count);
  99
 100                                         last_account_name = acct_name;
 101
 102                                         continue;
 103                                     }
 104
 105                                     Matcher tr_m = tr_re.matcher(line);
 106                                     if (tr_m.find()) {
 107                                         Log.d("account-parser", "<tr> - another account expected");
 108                                         last_account_name = null;
 109                                         continue;
 110                                     }
 111
 112                                     if (last_account_name != null) {
 113                                         m = value_re.matcher(line);
 114                                         boolean match_found = false;
 115                                         while (m.find()) {
 116                                             match_found = true;
 117                                             String value = m.group(1);
 118                                             String currency = m.group(2);
 119                                             if (currency == null) currency = "";
 120                                             value = value.replace(',', '.');
 121                                             Log.d("db", "curr=" + currency + ", value=" + value);
 122                                             db.execSQL(
 123                                                     "insert or replace into account_values(account, currency, value, keep) values(?, ?, ?, 1);",
 124                                                     new Object[]{last_account_name, currency, Float.valueOf(value)
 125                                                     });
 126                                         }
 127
 128                                         if (match_found) continue;
 129                                     }
 130
 131                                     m = descriptions_line_re.matcher(line);
 132                                     if (m.find()) {
 133                                         db.execSQL("update description_history set keep=0;");
 134                                         m = description_items_re.matcher(line);
 135                                         while (m.find()) {
 136                                             String description = m.group(1);
 137                                             if (description.isEmpty()) continue;
 138
 139                                             Log.d("db", String.format("Stored description: %s",
 140                                                     description));
 141                                             db.execSQL("insert or replace into description_history"
 142                                                             + "(description, description_upper, keep) " + "values(?, ?, 1);",
 143                                                     new Object[]{description, description.toUpperCase()
 144                                                     });
 145                                         }
 146                                     }
 147                                 }
 148
 149                                 db.execSQL("delete from account_values where keep=0;");
 150                                 db.execSQL("delete from accounts where keep=0;");
 151 //                        db.execSQL("delete from description_history where keep=0;");
 152                                 db.setTransactionSuccessful();
 153                             }
 154                             finally {
 155                                 db.endTransaction();
 156                             }
 157
 158                         }
 159                     }
 160                 }
 161             }
 162         } catch (MalformedURLException e) {
 163             error = R.string.err_bad_backend_url;
 164             e.printStackTrace();
 165         }
 166         catch (FileNotFoundException e) {
 167             error = R.string.err_bad_auth;
 168             e.printStackTrace();
 169         }
 170         catch (IOException e) {
 171             error = R.string.err_net_io_error;
 172             e.printStackTrace();
 173         }
 174         catch (Exception e) {
 175             error = R.string.err_net_error;
 176             e.printStackTrace();
 177         }
 178
 179         return null;
 180     }
 181
 182     private void addAccount(SQLiteDatabase db, String name) {
 183         do {
 184             LedgerAccount acc = new LedgerAccount(name);
 185             db.execSQL(
 186                     "update accounts set level = ?, keep = 1 where name = ?",
 187                     new Object[]{acc.getLevel(), name});
 188             db.execSQL("insert into accounts(name, name_upper, parent_name, level) select ?,?,"
 189                             + "?,? " + "where (select changes() = 0)",
 190                     new Object[]{name, name.toUpperCase(), acc.getParentName(), acc.getLevel()});
 191             name = acc.getParentName();
 192         } while (name != null);
 193     }
 194     @Override
 195     protected void onPostExecute(Void result) {
 196         AccountSummary ctx = mContext.get();
 197         if (ctx == null) return;
 198         ctx.onAccountRefreshDone(this.error);
 199     }
 200
 201 }