app/src/main/java/net/ktnx/mobileledger/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;
  19
  20 import android.content.SharedPreferences;
  21 import android.database.sqlite.SQLiteDatabase;
  22 import android.util.Log;
  23
  24 import java.io.BufferedReader;
  25 import java.io.FileNotFoundException;
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.io.InputStreamReader;
  29 import java.lang.ref.WeakReference;
  30 import java.net.HttpURLConnection;
  31 import java.net.MalformedURLException;
  32 import java.net.URLDecoder;
  33 import java.util.regex.Matcher;
  34 import java.util.regex.Pattern;
  35
  36 class RetrieveAccountsTask extends android.os.AsyncTask<Void, Integer, Void> {
  37     int error;
  38
  39     private SharedPreferences pref;
  40     WeakReference<AccountSummary> mContext;
  41
  42     RetrieveAccountsTask(WeakReference<AccountSummary> context) {
  43         mContext = context;
  44         error = 0;
  45     }
  46
  47     void setPref(SharedPreferences pref) {
  48         this.pref = pref;
  49     }
  50
  51     protected Void doInBackground(Void... params) {
  52         try {
  53             HttpURLConnection http = NetworkUtil.prepare_connection( pref, "add");
  54             http.setAllowUserInteraction(false);
  55             http.setRequestProperty("Accept-Charset", "UTF-8");
  56             publishProgress(0);
  57             try(MobileLedgerDatabase dbh = new MobileLedgerDatabase(mContext.get())) {
  58                 try(SQLiteDatabase db = dbh.getWritableDatabase()) {
  59                     try (InputStream resp = http.getInputStream()) {
  60                         Log.d("update_accounts", String.valueOf(http.getResponseCode()));
  61                         if (http.getResponseCode() != 200) {
  62                             throw new IOException(
  63                                     String.format("HTTP error: %d %s", http.getResponseCode(), http.getResponseMessage()));
  64                         }
  65                         else {
  66                             if (db.inTransaction()) throw new AssertionError();
  67
  68                             db.beginTransaction();
  69
  70                             try {
  71                                 db.execSQL("update account_values set keep=0;");
  72                                 db.execSQL("update accounts set keep=0;");
  73
  74                                 String line;
  75                                 String last_account_name = null;
  76                                 BufferedReader buf =
  77                                         new BufferedReader(new InputStreamReader(resp, "UTF-8"));
  78                                 // %3A is '='
  79                                 Pattern account_name_re = Pattern.compile("/register\\?q=inacct%3A([a-zA-Z0-9%]+)\"");
  80                                 Pattern value_re = Pattern.compile(
  81                                         "<span class=\"[^\"]*\\bamount\\b[^\"]*\">\\s*([-+]?[\\d.,]+)(?:\\s+(\\S+))?</span>");
  82                                 Pattern tr_re = Pattern.compile("</tr>");
  83                                 Pattern descriptions_line_re = Pattern.compile("\\bdescriptionsSuggester\\s*=\\s*new\\b");
  84                                 Pattern description_items_re = Pattern.compile("\"value\":\"([^\"]+)\"");
  85                                 int count = 0;
  86                                 while ((line = buf.readLine()) != null) {
  87                                     Matcher m = account_name_re.matcher(line);
  88                                     if (m.find()) {
  89                                         String acct_encoded = m.group(1);
  90                                         String acct_name = URLDecoder.decode(acct_encoded, "UTF-8");
  91                                         acct_name = acct_name.replace("\"", "");
  92                                         Log.d("account-parser", acct_name);
  93
  94                                         addAccount(db, acct_name);
  95                                         publishProgress(++count);
  96
  97                                         last_account_name = acct_name;
  98
  99                                         continue;
 100                                     }
 101
 102                                     Matcher tr_m = tr_re.matcher(line);
 103                                     if (tr_m.find()) {
 104                                         Log.d("account-parser", "<tr> - another account expected");
 105                                         last_account_name = null;
 106                                         continue;
 107                                     }
 108
 109                                     if (last_account_name != null) {
 110                                         m = value_re.matcher(line);
 111                                         boolean match_found = false;
 112                                         while (m.find()) {
 113                                             match_found = true;
 114                                             String value = m.group(1);
 115                                             String currency = m.group(2);
 116                                             if (currency == null) currency = "";
 117                                             value = value.replace(',', '.');
 118                                             Log.d("db", "curr=" + currency + ", value=" + value);
 119                                             db.execSQL(
 120                                                     "insert or replace into account_values(account, currency, value, keep) values(?, ?, ?, 1);",
 121                                                     new Object[]{last_account_name, currency, Float.valueOf(value)
 122                                                     });
 123                                         }
 124
 125                                         if (match_found) continue;
 126                                     }
 127
 128                                     m = descriptions_line_re.matcher(line);
 129                                     if (m.find()) {
 130                                         db.execSQL("update description_history set keep=0;");
 131                                         m = description_items_re.matcher(line);
 132                                         while (m.find()) {
 133                                             String description = m.group(1);
 134                                             if (description.isEmpty()) continue;
 135
 136                                             Log.d("db", String.format("Stored description: %s",
 137                                                     description));
 138                                             db.execSQL("insert or replace into description_history"
 139                                                             + "(description, description_upper, keep) " + "values(?, ?, 1);",
 140                                                     new Object[]{description, description.toUpperCase()
 141                                                     });
 142                                         }
 143                                     }
 144                                 }
 145
 146                                 db.execSQL("delete from account_values where keep=0;");
 147                                 db.execSQL("delete from accounts where keep=0;");
 148 //                        db.execSQL("delete from description_history where keep=0;");
 149                                 db.setTransactionSuccessful();
 150                             }
 151                             finally {
 152                                 db.endTransaction();
 153                             }
 154
 155                         }
 156                     }
 157                 }
 158             }
 159         } catch (MalformedURLException e) {
 160             error = R.string.err_bad_backend_url;
 161             e.printStackTrace();
 162         }
 163         catch (FileNotFoundException e) {
 164             error = R.string.err_bad_auth;
 165             e.printStackTrace();
 166         }
 167         catch (IOException e) {
 168             error = R.string.err_net_io_error;
 169             e.printStackTrace();
 170         }
 171         catch (Exception e) {
 172             error = R.string.err_net_error;
 173             e.printStackTrace();
 174         }
 175
 176         return null;
 177     }
 178
 179     private void addAccount(SQLiteDatabase db, String name) {
 180         do {
 181             LedgerAccount acc = new LedgerAccount(name);
 182             db.execSQL(
 183                     "insert or replace into accounts(name, name_upper, level, parent_name, keep) "
 184                             + "values(?, ?, ?, ?, 1)",
 185                     new Object[]{name, name.toUpperCase(), acc.getLevel(), acc.getParentName()});
 186             name = acc.getParentName();
 187         } while (name != null);
 188     }
 189     @Override
 190     protected void onPostExecute(Void result) {
 191         AccountSummary ctx = mContext.get();
 192         if (ctx == null) return;
 193         ctx.onAccountRefreshDone(this.error);
 194     }
 195
 196 }