demos/embedded/flightinfo/flightinfo.cpp

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  41
  42 #include <QtCore>
  43 #include <QtWidgets>
  44 #include <QtNetwork>
  45
  46 #include "ui_form.h"
  47
  48 #define FLIGHTVIEW_URL "http://mobile.flightview.com/TrackByFlight.aspx"
  49 #define FLIGHTVIEW_RANDOM "http://mobile.flightview.com/TrackSampleFlight.aspx"
  50
  51 // strips all invalid constructs that might trip QXmlStreamReader
  52 static QString sanitized(const QString &xml)
  53 {
  54     QString data = xml;
  55
  56     // anything up to the html tag
  57     int i = data.indexOf("<html");
  58     if (i > 0)
  59         data.remove(0, i - 1);
  60
  61     // everything inside the head tag
  62     i = data.indexOf("<head");
  63     if (i > 0)
  64         data.remove(i, data.indexOf("</head>") - i + 7);
  65
  66     // invalid link for JavaScript code
  67     while (true) {
  68         i  = data.indexOf("onclick=\"gotoUrl(");
  69         if (i < 0)
  70             break;
  71         data.remove(i, data.indexOf('\"', i + 9) - i + 1);
  72     }
  73
  74     // all inline frames
  75     while (true) {
  76         i  = data.indexOf("<iframe");
  77         if (i < 0)
  78             break;
  79         data.remove(i, data.indexOf("</iframe>") - i + 8);
  80     }
  81
  82     // entities
  83     data.remove("&nbsp;");
  84     data.remove("&copy;");
  85
  86     return data;
  87 }
  88
  89 class FlightInfo : public QMainWindow
  90 {
  91     Q_OBJECT
  92
  93 private:
  94
  95     Ui_Form ui;
  96     QUrl m_url;
  97     QDate m_searchDate;
  98     QPixmap m_map;
  99     QNetworkAccessManager m_manager;
 100     QList<QNetworkReply *> mapReplies;
 101
 102 public:
 103
 104     FlightInfo(QMainWindow *parent = 0): QMainWindow(parent) {
 105
 106         QWidget *w = new QWidget(this);
 107         ui.setupUi(w);
 108         setCentralWidget(w);
 109
 110         ui.searchBar->hide();
 111         ui.infoBox->hide();
 112         connect(ui.searchButton, SIGNAL(clicked()), SLOT(startSearch()));
 113         connect(ui.flightEdit, SIGNAL(returnPressed()), SLOT(startSearch()));
 114
 115         setWindowTitle("Flight Info");
 116
 117         // Rendered from the public-domain vectorized aircraft
 118         // http://openclipart.org/media/people/Jarno
 119         m_map = QPixmap(":/aircraft.png");
 120
 121         QAction *searchTodayAction = new QAction("Today's Flight", this);
 122         QAction *searchYesterdayAction = new QAction("Yesterday's Flight", this);
 123         QAction *randomAction = new QAction("Random Flight", this);
 124         connect(searchTodayAction, SIGNAL(triggered()), SLOT(today()));
 125         connect(searchYesterdayAction, SIGNAL(triggered()), SLOT(yesterday()));
 126         connect(randomAction, SIGNAL(triggered()), SLOT(randomFlight()));
 127         connect(&m_manager, SIGNAL(finished(QNetworkReply*)),
 128                 this, SLOT(handleNetworkData(QNetworkReply*)));
 129 #if defined(Q_OS_SYMBIAN)
 130         menuBar()->addAction(searchTodayAction);
 131         menuBar()->addAction(searchYesterdayAction);
 132         menuBar()->addAction(randomAction);
 133 #else
 134         addAction(searchTodayAction);
 135         addAction(searchYesterdayAction);
 136         addAction(randomAction);
 137         setContextMenuPolicy(Qt::ActionsContextMenu);
 138 #endif
 139     }
 140
 141 private slots:
 142
 143     void handleNetworkData(QNetworkReply *networkReply) {
 144         if (!networkReply->error()) {
 145             if (!mapReplies.contains(networkReply)) {
 146                 // Assume UTF-8 encoded
 147                 QByteArray data = networkReply->readAll();
 148                 QString xml = QString::fromUtf8(data);
 149                 digest(xml);
 150             } else {
 151                 mapReplies.removeOne(networkReply);
 152                 m_map.loadFromData(networkReply->readAll());
 153                 update();
 154             }
 155         }
 156         networkReply->deleteLater();
 157     }
 158
 159     void today() {
 160         QDateTime timestamp = QDateTime::currentDateTime();
 161         m_searchDate = timestamp.date();
 162         searchFlight();
 163     }
 164
 165     void yesterday() {
 166         QDateTime timestamp = QDateTime::currentDateTime();
 167         timestamp = timestamp.addDays(-1);
 168         m_searchDate = timestamp.date();
 169         searchFlight();
 170     }
 171
 172     void searchFlight() {
 173         ui.searchBar->show();
 174         ui.infoBox->hide();
 175         ui.flightStatus->hide();
 176         ui.flightName->setText("Enter flight number");
 177         ui.flightEdit->setFocus();
 178 #ifdef QT_KEYPAD_NAVIGATION
 179         ui.flightEdit->setEditFocus(true);
 180 #endif
 181         m_map = QPixmap();
 182         update();
 183     }
 184
 185     void startSearch() {
 186         ui.searchBar->hide();
 187         QString flight = ui.flightEdit->text().simplified();
 188         if (!flight.isEmpty())
 189             request(flight, m_searchDate);
 190     }
 191
 192     void randomFlight() {
 193         request(QString(), QDate::currentDate());
 194     }
 195
 196 public slots:
 197
 198     void request(const QString &flightCode, const QDate &date) {
 199
 200         setWindowTitle("Loading...");
 201
 202         QString code = flightCode.simplified();
 203         QString airlineCode = code.left(2).toUpper();
 204         QString flightNumber = code.mid(2, code.length());
 205
 206         ui.flightName->setText("Searching for " + code);
 207
 208         m_url = QUrl(FLIGHTVIEW_URL);
 209         m_url.addEncodedQueryItem("view", "detail");
 210         m_url.addEncodedQueryItem("al", QUrl::toPercentEncoding(airlineCode));
 211         m_url.addEncodedQueryItem("fn", QUrl::toPercentEncoding(flightNumber));
 212         m_url.addEncodedQueryItem("dpdat", QUrl::toPercentEncoding(date.toString("yyyyMMdd")));
 213
 214         if (code.isEmpty()) {
 215             // random flight as sample
 216             m_url = QUrl(FLIGHTVIEW_RANDOM);
 217             ui.flightName->setText("Getting a random flight...");
 218         }
 219
 220         m_manager.get(QNetworkRequest(m_url));
 221     }
 222
 223
 224 private:
 225
 226     void digest(const QString &content) {
 227
 228         setWindowTitle("Flight Info");
 229         QString data = sanitized(content);
 230
 231         // do we only get the flight list?
 232         // we grab the first leg in the flight list
 233         // then fetch another URL for the real flight info
 234         int i = data.indexOf("a href=\"?view=detail");
 235         if (i > 0) {
 236             QString href = data.mid(i, data.indexOf('\"', i + 8) - i + 1);
 237             QRegExp regex("dpap=([A-Za-z0-9]+)");
 238             regex.indexIn(href);
 239             QString airport = regex.cap(1);
 240             m_url.addEncodedQueryItem("dpap", QUrl::toPercentEncoding(airport));
 241             m_manager.get(QNetworkRequest(m_url));
 242             return;
 243         }
 244
 245         QXmlStreamReader xml(data);
 246         bool inFlightName = false;
 247         bool inFlightStatus = false;
 248         bool inFlightMap = false;
 249         bool inFieldName = false;
 250         bool inFieldValue = false;
 251
 252         QString flightName;
 253         QString flightStatus;
 254         QStringList fieldNames;
 255         QStringList fieldValues;
 256
 257         while (!xml.atEnd()) {
 258             xml.readNext();
 259
 260             if (xml.tokenType() == QXmlStreamReader::StartElement) {
 261                 QStringRef className = xml.attributes().value("class");
 262                 inFlightName |= xml.name() == "h1";
 263                 inFlightStatus |= className == "FlightDetailHeaderStatus";
 264                 inFlightMap |= className == "flightMap";
 265                 if (xml.name() == "td" && !className.isEmpty()) {
 266                     QString cn = className.toString();
 267                     if (cn.contains("fieldTitle")) {
 268                         inFieldName = true;
 269                         fieldNames += QString();
 270                         fieldValues += QString();
 271                     }
 272                     if (cn.contains("fieldValue"))
 273                         inFieldValue = true;
 274                 }
 275                 if (xml.name() == "img" && inFlightMap) {
 276                     QString src = xml.attributes().value("src").toString();
 277                     src.prepend("http://mobile.flightview.com/");
 278                     QUrl url = QUrl::fromPercentEncoding(src.toAscii());
 279                     mapReplies.append(m_manager.get(QNetworkRequest(url)));
 280                 }
 281             }
 282
 283             if (xml.tokenType() == QXmlStreamReader::EndElement) {
 284                 inFlightName &= xml.name() != "h1";
 285                 inFlightStatus &= xml.name() != "div";
 286                 inFlightMap &= xml.name() != "div";
 287                 inFieldName &= xml.name() != "td";
 288                 inFieldValue &= xml.name() != "td";
 289             }
 290
 291             if (xml.tokenType() == QXmlStreamReader::Characters) {
 292                 if (inFlightName)
 293                     flightName += xml.text();
 294                 if (inFlightStatus)
 295                     flightStatus += xml.text();
 296                 if (inFieldName)
 297                     fieldNames.last() += xml.text();
 298                 if (inFieldValue)
 299                     fieldValues.last() += xml.text();
 300             }
 301         }
 302
 303         if (fieldNames.isEmpty()) {
 304             QString code = ui.flightEdit->text().simplified().left(10);
 305             QString msg = QString("Flight %1 is not found").arg(code);
 306             ui.flightName->setText(msg);
 307             return;
 308         }
 309
 310         ui.flightName->setText(flightName);
 311         flightStatus.remove("Status: ");
 312         ui.flightStatus->setText(flightStatus);
 313         ui.flightStatus->show();
 314
 315         QStringList whiteList;
 316         whiteList << "Departure";
 317         whiteList << "Arrival";
 318         whiteList << "Scheduled";
 319         whiteList << "Takeoff";
 320         whiteList << "Estimated";
 321         whiteList << "Term-Gate";
 322
 323         QString text;
 324         text = QString("<table width=%1>").arg(width() - 25);
 325         for (int i = 0; i < fieldNames.count(); i++) {
 326             QString fn = fieldNames[i].simplified();
 327             if (fn.endsWith(':'))
 328                 fn = fn.left(fn.length() - 1);
 329             if (!whiteList.contains(fn))
 330                 continue;
 331
 332             QString fv = fieldValues[i].simplified();
 333             bool special = false;
 334             special |= fn.startsWith("Departure");
 335             special |= fn.startsWith("Arrival");
 336             text += "<tr>";
 337             if (special) {
 338                 text += "<td align=center colspan=2>";
 339                 text += "<b><font size=+1>" + fv + "</font></b>";
 340                 text += "</td>";
 341             } else {
 342                 text += "<td align=right>";
 343                 text += fn;
 344                 text += " : ";
 345                 text += "&nbsp;";
 346                 text += "</td>";
 347                 text += "<td>";
 348                 text += fv;
 349                 text += "</td>";
 350             }
 351             text += "</tr>";
 352         }
 353         text += "</table>";
 354         ui.detailedInfo->setText(text);
 355         ui.infoBox->show();
 356     }
 357
 358     void resizeEvent(QResizeEvent *event) {
 359         Q_UNUSED(event);
 360         ui.detailedInfo->setMaximumWidth(width() - 25);
 361     }
 362
 363     void paintEvent(QPaintEvent *event) {
 364         QMainWindow::paintEvent(event);
 365         QPainter p(this);
 366         p.fillRect(rect(), QColor(131, 171, 210));
 367         if (!m_map.isNull()) {
 368             int x = (width() - m_map.width()) / 2;
 369             int space = ui.infoBox->pos().y();
 370             if (!ui.infoBox->isVisible())
 371                 space = height();
 372             int top = ui.titleBox->height();
 373             int y = qMax(top, (space - m_map.height()) / 2);
 374             p.drawPixmap(x, y, m_map);
 375         }
 376         p.end();
 377     }
 378
 379 };
 380
 381
 382 #include "flightinfo.moc"
 383
 384 int main(int argc, char **argv)
 385 {
 386     Q_INIT_RESOURCE(flightinfo);
 387
 388     QApplication app(argc, argv);
 389
 390     FlightInfo w;
 391 #if defined(Q_OS_SYMBIAN)
 392     w.showMaximized();
 393 #else
 394     w.resize(360, 504);
 395     w.show();
 396 #endif
 397
 398     return app.exec();
 399 }