Initial commit.

src/playlistparsers/asxparser.cpp

@@ -0,0 +1,155 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ *
+ * Strawberry 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+#include "config.h"
+
+#include "asxparser.h"
+#include "core/utilities.h"
+
+#include <QBuffer>
+#include <QDomDocument>
+#include <QFile>
+#include <QIODevice>
+#include <QRegExp>
+#include <QUrl>
+#include <QXmlStreamReader>
+#include <QtDebug>
+
+ASXParser::ASXParser(CollectionBackendInterface *collection, QObject *parent)
+    : XMLParser(collection, parent) {}
+
+SongList ASXParser::Load(QIODevice *device, const QString &playlist_path, const QDir &dir) const {
+
+  // We have to load everything first so we can munge the "XML".
+  QByteArray data = device->readAll();
+
+  // (thanks Amarok...)
+  // ASX looks a lot like xml, but doesn't require tags to be case sensitive,
+  // meaning we have to accept things like: <Abstract>...</abstract>
+  // We use a dirty way to achieve this: we make all tags lower case
+  QRegExp ex("(<[/]?[^>]*[A-Z]+[^>]*>)");
+  ex.setCaseSensitivity(Qt::CaseInsensitive);
+  int index = 0;
+  while ((index = ex.indexIn(data, index)) != -1) {
+    data.replace(ex.cap(1).toLocal8Bit(), ex.cap(1).toLower().toLocal8Bit());
+    index += ex.matchedLength();
+  }
+
+  // Some playlists have unescaped & characters in URLs :(
+  ex.setPattern("(href\\s*=\\s*\")([^\"]+)\"");
+  index = 0;
+  while ((index = ex.indexIn(data, index)) != -1) {
+    QString url = ex.cap(2);
+    url.replace(QRegExp("&(?!amp;|quot;|apos;|lt;|gt;)"), "&amp;");
+
+    QByteArray replacement = QString(ex.cap(1) + url + "\"").toLocal8Bit();
+    data.replace(ex.cap(0).toLocal8Bit(), replacement);
+    index += replacement.length();
+  }
+
+  QBuffer buffer(&data);
+  buffer.open(QIODevice::ReadOnly);
+
+  SongList ret;
+
+  QXmlStreamReader reader(&buffer);
+  if (!Utilities::ParseUntilElement(&reader, "asx")) {
+    return ret;
+  }
+
+  while (!reader.atEnd() && Utilities::ParseUntilElement(&reader, "entry")) {
+    Song song = ParseTrack(&reader, dir);
+    if (song.is_valid()) {
+      ret << song;
+    }
+  }
+  return ret;
+
+}
+
+Song ASXParser::ParseTrack(QXmlStreamReader *reader, const QDir &dir) const {
+
+  QString title, artist, album, ref;
+
+  while (!reader->atEnd()) {
+    QXmlStreamReader::TokenType type = reader->readNext();
+
+    switch (type) {
+      case QXmlStreamReader::StartElement: {
+        QStringRef name = reader->name();
+        if (name == "ref") {
+          ref = reader->attributes().value("href").toString();
+        } else if (name == "title") {
+          title = reader->readElementText();
+        } else if (name == "author") {
+          artist = reader->readElementText();
+        }
+        break;
+      }
+      case QXmlStreamReader::EndElement: {
+        if (reader->name() == "entry") {
+          goto return_song;
+        }
+        break;
+      }
+      default:
+        break;
+    }
+  }
+
+return_song:
+  Song song = LoadSong(ref, 0, dir);
+
+  // Override metadata with what was in the playlist
+  song.set_title(title);
+  song.set_artist(artist);
+  song.set_album(album);
+  return song;
+
+}
+
+void ASXParser::Save(const SongList &songs, QIODevice *device, const QDir&, Playlist::Path path_type) const {
+
+  QXmlStreamWriter writer(device);
+  writer.setAutoFormatting(true);
+  writer.setAutoFormattingIndent(2);
+  writer.writeStartDocument();
+  {
+    StreamElement asx("asx", &writer);
+    writer.writeAttribute("version", "3.0");
+    for (const Song &song : songs) {
+      StreamElement entry("entry", &writer);
+      writer.writeTextElement("title", song.title());
+      {
+        StreamElement ref("ref", &writer);
+        writer.writeAttribute("href", song.url().toString());
+      }
+      if (!song.artist().isEmpty()) {
+        writer.writeTextElement("author", song.artist());
+      }
+    }
+  }
+  writer.writeEndDocument();
+
+}
+
+bool ASXParser::TryMagic(const QByteArray &data) const {
+  return data.toLower().contains("<asx");
+}