Reddit Client Example

Basic Reddit client which shows the user posts in a QListView.

Change-Id: I16c23bac2d7dc709c6223f6c6cf22a63e057a545
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 118 insertions, 0 deletions

diff --git a/examples/oauth/redditclient/redditmodel.cpp b/examples/oauth/redditclient/redditmodel.cpp
new file mode 100644
index 0000000..077ed18
--- /dev/null
+++ b/examples/oauth/redditclient/redditmodel.cpp
@@ -0,0 +1,118 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtNetwork 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 "redditmodel.h"
+
+#include <QtCore>
+#include <QtNetwork>
+
+RedditModel::RedditModel(QObject *parent) : QAbstractTableModel(parent) {}
+
+RedditModel::RedditModel(const QString &clientId, QObject *parent) :
+    QAbstractTableModel(parent),
+    redditWrapper(clientId)
+{
+    grant();
+}
+
+int RedditModel::rowCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent);
+    return threads.size();
+}
+
+int RedditModel::columnCount(const QModelIndex &parent) const
+{
+    Q_UNUSED(parent);
+    return threads.size() ? 1 : 0;
+}
+
+QVariant RedditModel::data(const QModelIndex &index, int role) const
+{
+    Q_UNUSED(role);
+    if (!index.isValid())
+        return QVariant();
+
+    if (role == Qt::DisplayRole) {
+        const auto childrenObject = threads.at(index.row());
+        Q_ASSERT(childrenObject.value("data").isObject());
+        const auto dataObject = childrenObject.value("data").toObject();
+        return dataObject.value("title").toString();
+    }
+    return QVariant();
+}
+
+void RedditModel::grant()
+{
+    redditWrapper.grant();
+    connect(&redditWrapper, &RedditWrapper::authenticated, this, &RedditModel::update);
+}
+
+void RedditModel::update()
+{
+    auto reply = redditWrapper.requestHotThreads();
+
+    connect(reply, &QNetworkReply::finished, [=]() {
+        if (reply->error() != QNetworkReply::NoError) {
+            emit error(reply->errorString());
+            return;
+        }
+        const auto json = reply->readAll();
+        const auto document = QJsonDocument::fromJson(json);
+        Q_ASSERT(document.isObject());
+        const auto rootObject = document.object();
+        Q_ASSERT(rootObject.value("kind").toString() == "Listing");
+        const auto dataValue = rootObject.value("data");
+        Q_ASSERT(dataValue.isObject());
+        const auto dataObject = dataValue.toObject();
+        const auto childrenValue = dataObject.value("children");
+        Q_ASSERT(childrenValue.isArray());
+        const auto childrenArray = childrenValue.toArray();
+
+        if (childrenArray.isEmpty())
+            return;
+
+        beginInsertRows(QModelIndex(), threads.size(), childrenArray.size() + threads.size() - 1);
+        for (const auto childValue : qAsConst(childrenArray)) {
+            Q_ASSERT(childValue.isObject());
+            threads.append(childValue.toObject());
+        }
+        endInsertRows();
+    });
+}