Add routing support for the mapbox geoservice plugin

This patch adds routing support for the mapbox plugin

Change-Id: Ibaf9d9d8a845b49cb8a6fc0d3530ffe57f4989db
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>

1 files changed, 231 insertions, 0 deletions

diff --git a/src/plugins/geoservices/mapbox/qgeoroutereplymapbox.cpp b/src/plugins/geoservices/mapbox/qgeoroutereplymapbox.cpp
new file mode 100644
index 00000000..4c98412b
--- /dev/null
+++ b/src/plugins/geoservices/mapbox/qgeoroutereplymapbox.cpp
@@ -0,0 +1,231 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Vlad Seryakov <vseryakov@gmail.com>
+** Copyright (C) 2016 Aaron McCarthy <mccarthy.aaron@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qgeoroutereplymapbox.h"
+
+#include <QtCore/QJsonDocument>
+#include <QtCore/QJsonObject>
+#include <QtCore/QJsonArray>
+#include <QtLocation/QGeoRouteSegment>
+#include <QtLocation/QGeoManeuver>
+
+QT_BEGIN_NAMESPACE
+
+static QList<QGeoCoordinate> parsePolyline(const QString &line)
+{
+    QList<QGeoCoordinate> path;
+    QByteArray data(line.toLocal8Bit());
+
+    int mode = 0, shift = 0, value = 0, coord[2] = {0, 0};
+    for (int i = 0; i < data.length(); ++i) {
+        int c = data.at(i) - 63;
+        value |= (c & 0x1f) << shift;
+        shift += 5;
+        if (c & 0x20) continue;
+        coord[mode] += (value & 1) ? ~(value >> 1) : (value >> 1);
+        if (mode) path.append(QGeoCoordinate((double)coord[0]/1e5, (double)coord[1]/1e5));
+        mode = 1 - mode;
+        value = shift = 0;
+    }
+    return path;
+}
+
+static QList<QGeoCoordinate> parseGeometry(const QJsonValue &geometry)
+{
+    QList<QGeoCoordinate> path;
+    if (geometry.isString()) path = parsePolyline(geometry.toString());
+    if (geometry.isObject()) {
+        QJsonArray coords = geometry.toObject().value(QStringLiteral("coordinates")).toArray();
+        for (int i = 0; i < coords.count(); i++) {
+            QJsonArray coord = coords.at(i).toArray();
+            if (coord.count() != 2) continue;
+            path.append(QGeoCoordinate(coord.at(1).toDouble(), coord.at(0).toDouble()));
+        }
+    }
+    return path;
+}
+
+QGeoRouteReplyMapbox::QGeoRouteReplyMapbox(QNetworkReply *reply, const QGeoRouteRequest &request,
+                                     QObject *parent)
+:   QGeoRouteReply(request, parent), m_reply(reply)
+{
+    connect(m_reply, SIGNAL(finished()), this, SLOT(networkReplyFinished()));
+    connect(m_reply, SIGNAL(error(QNetworkReply::NetworkError)),
+            this, SLOT(networkReplyError(QNetworkReply::NetworkError)));
+}
+
+QGeoRouteReplyMapbox::~QGeoRouteReplyMapbox()
+{
+    if (m_reply)
+        m_reply->deleteLater();
+}
+
+void QGeoRouteReplyMapbox::abort()
+{
+    if (!m_reply)
+        return;
+
+    m_reply->abort();
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+static QGeoRoute constructRoute(const QJsonObject &obj)
+{
+    QGeoRoute route;
+    route.setDistance(obj.value(QStringLiteral("distance")).toDouble());
+    route.setTravelTime(obj.value(QStringLiteral("duration")).toDouble());
+
+    QList<QGeoCoordinate> path = parseGeometry(obj.value(QStringLiteral("geometry")));
+    route.setPath(path);
+
+    QGeoRouteSegment firstSegment, lastSegment;
+    QJsonArray legs = obj.value(QStringLiteral("legs")).toArray();
+
+    for (int i = 0; i < legs.count(); i++) {
+        QJsonObject leg = legs.at(i).toObject();
+        QJsonArray steps = leg.value("steps").toArray();
+
+        for (int j = 0; j < steps.count(); j++) {
+            QJsonObject step = steps.at(j).toObject();
+            QJsonObject stepManeuver = step.value("maneuver").toObject();
+
+            QGeoRouteSegment segment;
+            segment.setDistance(step.value("distance").toDouble());
+            segment.setTravelTime(step.value(QStringLiteral("duration")).toDouble());
+
+            QGeoManeuver maneuver;
+            maneuver.setDistanceToNextInstruction(step.value("distance").toDouble());
+            maneuver.setInstructionText(stepManeuver.value("instruction").toString());
+            maneuver.setTimeToNextInstruction(step.value(QStringLiteral("duration")).toDouble());
+            QJsonArray location = stepManeuver.value(QStringLiteral("location")).toArray();
+            if (location.count() > 1)
+                maneuver.setPosition(QGeoCoordinate(location.at(0).toDouble(), location.at(1).toDouble()));
+
+            QString modifier = stepManeuver.value("modifier").toString();
+            int bearing1 = stepManeuver.value("bearing_before").toInt();
+            int bearing2 = stepManeuver.value("bearing_after").toInt();
+
+            if (modifier == "straight")
+                maneuver.setDirection(QGeoManeuver::DirectionForward);
+            else if (modifier == "slight right")
+                maneuver.setDirection(QGeoManeuver::DirectionLightRight);
+            else if (modifier == "right")
+                maneuver.setDirection(QGeoManeuver::DirectionRight);
+            else if (modifier == "sharp right")
+                maneuver.setDirection(QGeoManeuver::DirectionHardRight);
+            else if (modifier == "uturn")
+                maneuver.setDirection(bearing2 - bearing1 > 180 ? QGeoManeuver::DirectionUTurnLeft : QGeoManeuver::DirectionUTurnRight);
+            else if (modifier == "sharp left")
+                maneuver.setDirection(QGeoManeuver::DirectionHardLeft);
+            else if (modifier == "left")
+                maneuver.setDirection(QGeoManeuver::DirectionLeft);
+            else if (modifier == "slight left")
+                maneuver.setDirection(QGeoManeuver::DirectionLightLeft);
+            else
+                maneuver.setDirection(QGeoManeuver::NoDirection);
+
+            segment.setManeuver(maneuver);
+            segment.setPath(parseGeometry(step.value(QStringLiteral("geometry"))));
+
+            if (!firstSegment.isValid()) firstSegment = segment;
+            if (lastSegment.isValid()) lastSegment.setNextRouteSegment(segment);
+            lastSegment = segment;
+        }
+    }
+    route.setFirstRouteSegment(firstSegment);
+    return route;
+}
+
+void QGeoRouteReplyMapbox::networkReplyFinished()
+{
+    if (!m_reply)
+        return;
+
+    if (m_reply->error() != QNetworkReply::NoError) {
+        setError(QGeoRouteReply::CommunicationError, m_reply->errorString());
+        m_reply->deleteLater();
+        m_reply = 0;
+        return;
+    }
+
+    QJsonDocument document = QJsonDocument::fromJson(m_reply->readAll());
+    if (document.isObject()) {
+        QJsonObject object = document.object();
+
+        QString status = object.value(QStringLiteral("code")).toString();
+        if (status != QStringLiteral("Ok")) {
+            setError(QGeoRouteReply::UnknownError, object.value(QStringLiteral("message")).toString());
+            m_reply->deleteLater();
+            m_reply = 0;
+            return;
+        }
+
+        QList<QGeoRoute> list;
+        QJsonArray routes = object.value(QStringLiteral("routes")).toArray();
+        for (int i = 0; i < routes.count(); i++) {
+            QGeoRoute route = constructRoute(routes.at(i).toObject());
+            list.append(route);
+        }
+        setRoutes(list);
+        setFinished(true);
+    } else {
+        setError(QGeoRouteReply::ParseError, QStringLiteral("Couldn't parse json."));
+    }
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+void QGeoRouteReplyMapbox::networkReplyError(QNetworkReply::NetworkError error)
+{
+    Q_UNUSED(error)
+
+    if (!m_reply)
+        return;
+
+    setError(QGeoRouteReply::CommunicationError, m_reply->errorString());
+
+    m_reply->deleteLater();
+    m_reply = 0;
+}
+
+QT_END_NAMESPACE