File indexing completed on 2024-05-12 16:46:38

 /***************************************************************************
     Copyright (C) 2008-2020 Robby Stephenson <robby@periapsis.org>
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or         *
  *   modify it under the terms of the GNU General Public License as        *
  *   published by the Free Software Foundation; either version 2 of        *
  *   the License or (at your option) version 3 or any later version        *
  *   accepted by the membership of KDE e.V. (or its successor approved     *
  *   by the membership of KDE e.V.), which shall act as a proxy            *
  *   defined in Section 14 of version 3 of the license.                    *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *                                                                         *
  ***************************************************************************/
 
 #include "lccnvalidator.h"
 #include "../tellico_debug.h"
 
 using Tellico::LCCNValidator;
 
 LCCNValidator::LCCNValidator(QObject* parent_) : QRegularExpressionValidator(parent_) {
   QRegularExpression rx(QLatin1String("[a-z ]{0,3}"
                                       "("
                                       "\\d{2}-?\\d{1,6}"
                                       "|"
                                       "\\d{4}-?\\d{1,6}"
                                       ")"
                                       " ?\\w*"));
   setRegularExpression(rx);
 }
 
 // static
 QString LCCNValidator::formalize(const QString& value_) {
   QString value = value_.simplified();
   // remove spaces
   value.remove(QLatin1Char(' '));
   // remove everything after the forward slash
   value = value.section(QLatin1Char('/'), 0, 0);
 
   const int len = value_.length();
   // first remove alpha prefix
   QString alpha;
   for(int pos = 0; pos < len; ++pos) {
     QChar c = value.at(pos);
     if(c.isNumber()) {
       break;
     }
     alpha += value.at(pos);
   }
   QString afterAlpha = value.mid(alpha.length());
   alpha = alpha.trimmed(); // possible to have a space at the end
 
   QString year;
   QString serial;
   // have to be able to differentiate 2 and 4-digit years, first check for hyphen position
   int pos = afterAlpha.indexOf(QLatin1Char('-'));
   if(pos > -1) {
     year = afterAlpha.section(QLatin1Char('-'), 0, 0);
     serial = afterAlpha.section(QLatin1Char('-'), 1);
   } else {
     // make two assumptions, the user will never have a book from the year 1920
     // or from any year after 2100. Reasonable, right?
     // so if the string starts with '20' we take the first 4 digits as the year
     // otherwise the first 2
     if(afterAlpha.startsWith(QLatin1String("20"))) {
       year = afterAlpha.left(4);
       serial = afterAlpha.mid(4);
     } else {
       year = afterAlpha.left(2);
       serial = afterAlpha.mid(2);
     }
   }
 
   // now check for non digits in the serial
   pos = 0;
   for( ; pos < serial.length() && serial.at(pos).isNumber(); ++pos) { ; }
   QString suffix = serial.mid(pos);
   serial = serial.left(pos);
   // serial must be left-padded with zeros to 6 characters
   serial = serial.rightJustified(6, QLatin1Char('0'));
   return alpha + year + serial + suffix;
 }