src/feed/nfeedprogressdialog.cpp

   1 /* NomNom
   2  * Copyright (C) 2011  Toni Gundogdu <legatvs@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program 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 for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <QScriptValueIterator>
  19 #include <QScriptEngine>
  20
  21 #include <NFeedProgressDialog>
  22
  23 extern QString umph_path;
  24
  25 namespace nn
  26 {
  27
  28 NFeedProgressDialog::NFeedProgressDialog(QWidget *parent/*=NULL*/)
  29   : QProgressDialog(parent), _proc(NULL), _cancelled(false)
  30 {
  31   _proc = new QProcess;
  32   _proc->setProcessChannelMode(QProcess::MergedChannels);
  33
  34   connect(_proc, SIGNAL(error(QProcess::ProcessError)),
  35           this, SLOT(error(QProcess::ProcessError)));
  36   connect(_proc, SIGNAL(readyRead()), this, SLOT(read()));
  37   connect(_proc, SIGNAL(finished(int, QProcess::ExitStatus)),
  38           this, SLOT(finished(int, QProcess::ExitStatus)));
  39   connect(this, SIGNAL(canceled()), this, SLOT(cleanup()));
  40
  41   setWindowModality(Qt::WindowModal);
  42   setAutoClose(false);
  43 }
  44
  45 bool NFeedProgressDialog::open(QStringList& args)
  46 {
  47   setLabelText(tr("Working..."));
  48   _cancelled = false;
  49   _buffer.clear();
  50   _errmsg.clear();
  51   setMaximum(0);
  52   setMinimum(0);
  53   _args = args;
  54   show();
  55   _proc->start(args.takeFirst(), args);
  56   exec();
  57   return _errmsg.isEmpty();
  58 }
  59
  60 bool NFeedProgressDialog::results(feed::NFeedList& dst, QString& err)
  61 {
  62   const int n = _buffer.indexOf("{");
  63   if (n == -1)
  64     {
  65       err = tr("Unexpected data from umph");
  66       return false;
  67     }
  68
  69   QScriptEngine e;
  70   QScriptValue v = e.evaluate("("+_buffer.mid(n)+")");
  71   if (e.hasUncaughtException())
  72     {
  73       err = tr("Uncaught exception at line %1: %2")
  74             .arg(e.uncaughtExceptionLineNumber())
  75             .arg(v.toString());
  76       return false;
  77     }
  78
  79   QScriptValueIterator i(v.property("video"));
  80   if (!i.hasNext())
  81     {
  82       err = tr("umph did not return any video entries");
  83       return false;
  84     }
  85   dst.clear();
  86
  87   QString t,u;
  88   while (i.hasNext())
  89     {
  90       i.next();
  91       if (i.flags() & QScriptValue::SkipInEnumeration)
  92         continue;
  93       v = i.value();
  94       t = v.property("title").toString();
  95       u = v.property("url").toString();
  96
  97       feed::NFeedItem item(t,u);
  98       dst.append(item);
  99     }
 100   return true;
 101 }
 102
 103 void NFeedProgressDialog::error(QProcess::ProcessError n)
 104 {
 105   if (!_cancelled)
 106     {
 107       _errmsg = tr("Error while running command:<p>%1</p>"
 108                    "Qt error message follows (code #%2):<p>%3</p>")
 109                 .arg(_args.first())
 110                 .arg(n)
 111                 .arg(_proc->errorString());
 112     }
 113   cancel();
 114 }
 115
 116 void NFeedProgressDialog::read()
 117 {
 118   static char b[1024];
 119   while (_proc->readLine(b, sizeof(b)))
 120     _buffer += QString::fromLocal8Bit(b);
 121 }
 122
 123 void NFeedProgressDialog::finished(int ec, QProcess::ExitStatus es)
 124 {
 125   if (es != QProcess::NormalExit || ec != 0)
 126     {
 127       if (!_cancelled)
 128         {
 129           QRegExp rx("error: (.*)");
 130           if (rx.indexIn(_buffer) != -1)
 131             _errmsg = rx.cap(1).simplified();
 132           else
 133             _errmsg = tr("Unknown error occurred");
 134         }
 135     }
 136   cancel();
 137 }
 138
 139 void NFeedProgressDialog::cleanup()
 140 {
 141   _cancelled = true;
 142   if (_proc->state() == QProcess::Running)
 143     _proc->kill();
 144 }
 145
 146 QString NFeedProgressDialog::errmsg() const
 147 {
 148   return _errmsg;
 149 }
 150
 151 bool NFeedProgressDialog::cancelled() const
 152 {
 153   return _cancelled;
 154 }
 155
 156 } // namespace nn
 157
 158 /* vim: set ts=2 sw=2 tw=72 expandtab: */