File indexing completed on 2024-05-12 05:09:39

 /***************************************************************************
     Copyright (C) 2014-2020 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 "mrlookupfetcher.h"
 #include "../translators/bibteximporter.h"
 #include "../collections/bibtexcollection.h"
 #include "../utils/guiproxy.h"
 #include "../utils/string_utils.h"
 #include "../tellico_debug.h"
 
 #include <KLocalizedString>
 #include <KIO/Job>
 #include <KIO/JobUiDelegate>
 #include <KConfigGroup>
 #include <KJobWidgets/KJobWidgets>
 
 #include <QLabel>
 #include <QVBoxLayout>
 #include <QFile>
 #include <QTextCodec>
 #include <QUrlQuery>
 
 namespace {
   static const char* MRLOOKUP_URL = "https://mathscinet.ams.org/mrlookup";
 }
 
 using namespace Tellico;
 using Tellico::Fetch::MRLookupFetcher;
 
 MRLookupFetcher::MRLookupFetcher(QObject* parent_)
     : Fetcher(parent_)
     , m_started(false) {
 }
 
 MRLookupFetcher::~MRLookupFetcher() {
 }
 
 QString MRLookupFetcher::source() const {
   return m_name.isEmpty() ? defaultName() : m_name;
 }
 
 bool MRLookupFetcher::canSearch(Fetch::FetchKey k) const {
   return k == Title || k == Person;
 }
 
 bool MRLookupFetcher::canFetch(int type) const {
   return type == Data::Collection::Bibtex;
 }
 
 void MRLookupFetcher::readConfigHook(const KConfigGroup& config_) {
   Q_UNUSED(config_);
 }
 
 void MRLookupFetcher::search() {
   m_started = true;
 
   QUrl u(QString::fromLatin1(MRLOOKUP_URL));
   QUrlQuery q;
   switch(request().key()) {
     case Title:
       q.addQueryItem(QStringLiteral("ti"), request().value());
       break;
 
     case Person:
       q.addQueryItem(QStringLiteral("au"), request().value());
       break;
 
     default:
       myWarning() << source() << "- key not recognized:" << request().key();
       stop();
       return;
   }
   q.addQueryItem(QStringLiteral("format"), QStringLiteral("bibtex"));
   u.setQuery(q);
 
 //  myDebug() << u;
   m_job = KIO::storedGet(u, KIO::NoReload, KIO::HideProgressInfo);
   KJobWidgets::setWindow(m_job, GUI::Proxy::widget());
   connect(m_job.data(), &KJob::result, this, &MRLookupFetcher::slotComplete);
 }
 
 void MRLookupFetcher::stop() {
   if(!m_started) {
     return;
   }
   if(m_job) {
     m_job->kill();
     m_job = nullptr;
   }
   m_started = false;
   emit signalDone(this);
 }
 
 Tellico::Data::EntryPtr MRLookupFetcher::fetchEntryHook(uint uid_) {
   return m_entries[uid_];
 }
 
 Tellico::Fetch::FetchRequest MRLookupFetcher::updateRequest(Data::EntryPtr entry_) {
   QString title = entry_->field(QStringLiteral("title"));
   if(!title.isEmpty()) {
     return FetchRequest(Title, title);
   }
   return FetchRequest();
 }
 
 void MRLookupFetcher::slotComplete(KJob* job_) {
   KIO::StoredTransferJob* job = static_cast<KIO::StoredTransferJob*>(job_);
 
   if(job->error()) {
     job->uiDelegate()->showErrorMessage();
     stop();
     return;
   }
 
   QByteArray data = job->data();
   if(data.isEmpty()) {
     myDebug() << "no data";
     stop();
     return;
   }
   // see bug 319662. If fetcher is cancelled, job is killed
   // if the pointer is retained, it gets double-deleted
   m_job = nullptr;
 
 #if 0
   myWarning() << "Remove debug from mrlookup.cpp";
   QFile f(QString::fromLatin1("/tmp/test-mrlookup.html"));
   if(f.open(QIODevice::WriteOnly)) {
     QTextStream t(&f);
     t.setCodec("UTF-8");
     t << data;
   }
   f.close();
 #endif
   const QString text = QString::fromUtf8(data.constData(), data.size());
   QString bibtexString;
 
   // grab everything within the <pre></pre> block
   static const QRegularExpression preRx(QLatin1String("<pre>(.+?)</pre>"), QRegularExpression::DotMatchesEverythingOption);
   QRegularExpressionMatchIterator i = preRx.globalMatch(text);
   while(i.hasNext()) {
     QRegularExpressionMatch match = i.next();
     bibtexString += match.captured(1);
   }
   if(bibtexString.isEmpty()) {
     myDebug() << "no bibtex response";
     stop();
     return;
   }
 #if 0
   myWarning() << "Remove debug from mrlookup.cpp";
   QFile f(QString::fromLatin1("/tmp/test.bibtex"));
   if(f.open(QIODevice::WriteOnly)) {
     QTextStream t(&f);
     t.setCodec("UTF-8");
     t << bibtexString;
   }
   f.close();
 #endif
 
   Import::BibtexImporter imp(bibtexString);
   // quiet warnings...
   imp.setCurrentCollection(Data::CollPtr(new Data::BibtexCollection(true)));
   Data::CollPtr coll = imp.collection();
   if(!coll) {
     myDebug() << "no collection pointer";
     stop();
     return;
   }
 
   // switch the FJournal field with the Journal field
   foreach(Data::EntryPtr entry, coll->entries()) {
     entry->setField(QStringLiteral("journal"), entry->field(QStringLiteral("fjournal")));
   }
   coll->removeField(QStringLiteral("fjournal"));
   // unnecessary fields
   coll->removeField(QStringLiteral("mrclass"));
   coll->removeField(QStringLiteral("mrnumber"));
   coll->removeField(QStringLiteral("mrreviewer"));
 
   foreach(Data::EntryPtr entry, coll->entries()) {
     if(!m_started) {
       // might get aborted
       break;
     }
 
     FetchResult* r = new FetchResult(this, entry);
     m_entries.insert(r->uid, Data::EntryPtr(entry));
     emit signalResultFound(r);
   }
 //  m_hasMoreResults = m_start <= m_total;
   m_hasMoreResults = false; // for now, no continued searches
 
   stop(); // required
 }
 
 Tellico::Fetch::ConfigWidget* MRLookupFetcher::configWidget(QWidget* parent_) const {
   return new MRLookupFetcher::ConfigWidget(parent_, this);
 }
 
 QString MRLookupFetcher::defaultName() {
   return QStringLiteral("Mathematical Reviews");
 }
 
 QString MRLookupFetcher::defaultIcon() {
   return favIcon("http://www.ams.org");
 }
 
 MRLookupFetcher::ConfigWidget::ConfigWidget(QWidget* parent_, const MRLookupFetcher* /*=0*/)
     : Fetch::ConfigWidget(parent_) {
   QVBoxLayout* l = new QVBoxLayout(optionsWidget());
   l->addWidget(new QLabel(i18n("This source has no options."), optionsWidget()));
   l->addStretch();
 }
 
 QString MRLookupFetcher::ConfigWidget::preferredName() const {
   return MRLookupFetcher::defaultName();
 }