twittertimelinemodel.cpp Example File

** Copyright (C) 2016 The Qt Company Ltd.
** Contact:
** This file is part of the Qt Network Auth module of the Qt Toolkit.
** 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 For further
** information use the contact form at
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met:

#include "twittertimelinemodel.h"

#include <QtGui>
#include <QtCore>
#include <QtWidgets>

TwitterTimelineModel::TwitterTimelineModel(QObject *parent) : QAbstractTableModel(parent)
    connect(&twitter, &Twitter::authenticated, this, &TwitterTimelineModel::authenticated);
    connect(&twitter, &Twitter::authenticated, this, &TwitterTimelineModel::updateTimeline);

int TwitterTimelineModel::rowCount(const QModelIndex &parent) const
#if defined(QT_DEBUG)
    return tweets.size();

QVariant TwitterTimelineModel::data(const QModelIndex &index, int role) const
    if (role != Qt::DisplayRole)
        return QVariant();

    auto it = tweets.begin();
    std::advance(it, index.row());
    switch (index.column())
    case 0:
        return QString::number(it->id);
    case 1:
        return it->createdAt.toString(Qt::SystemLocaleShortDate);
    case 2:
        return it->user;
    case 3:
        return it->text;
    return QVariant();

int TwitterTimelineModel::columnCount(const QModelIndex &) const
    return 4;

QVariant TwitterTimelineModel::headerData(int section, Qt::Orientation orientation, int role) const
    if (role != Qt::DisplayRole)
        return QVariant();

    if (orientation == Qt::Horizontal) {
        switch (section) {
        case 0:
            return QStringLiteral("Id");
        case 1:
            return QStringLiteral("Created at");
        case 2:
            return QStringLiteral("User");
        case 3:
            return QStringLiteral("Text");
    return section;

void TwitterTimelineModel::authenticate(const QPair<QString, QString> &clientCredentials)

QAbstractOAuth::Status TwitterTimelineModel::status() const
    return twitter.status();

void TwitterTimelineModel::updateTimeline()
    if (twitter.status() != Twitter::Status::Granted)
        QMessageBox::warning(nullptr, qApp->applicationName(), "Not authenticated");

    QUrl url("");
    QUrlQuery query;
    if (tweets.size()) {
        // Tweets are time-ordered, newest first.  Pass the most recent
        // ID we have to request everything more recent than it:
        query.addQueryItem("since_id", QString::number(tweets.first().id));
        // From
        // Returns results with an ID greater than (that is, more recent than)
        // the specified ID. There are limits to the number of Tweets which can
        // be accessed through the API. If the limit of Tweets has occurred
        // since the since_id, the since_id will be forced to the oldest ID
        // available.
    QNetworkReply *reply = twitter.get(url);
    connect(reply, &QNetworkReply::finished, this, &TwitterTimelineModel::parseJson);

void TwitterTimelineModel::parseJson()
    QJsonParseError parseError;
    auto reply = qobject_cast<QNetworkReply*>(sender());
    const auto data = reply->readAll();
    const auto document = QJsonDocument::fromJson(data, &parseError);
    if (parseError.error) {
        qCritical() << "TwitterTimelineModel::parseJson. Error at:" << parseError.offset
                    << parseError.errorString();
    } else if (document.isObject()) {
        // Error received :(
        const auto object = document.object();
        const auto errorArray = object.value("errors").toArray();
        Q_ASSERT_X(errorArray.size(), "parse", data);
        QStringList errors;
        for (const auto error : errorArray) {
        QMessageBox::warning(nullptr, qApp->applicationName(), errors.join("<br />"));

    Q_ASSERT_X(document.isArray(), "parse", data);
    const auto array = document.array();
    if (array.size()) {
        beginInsertRows(QModelIndex(), 0, array.size() - 1);
        auto before = tweets.begin();
        for (const auto &value : array) {
            const auto object = value.toObject();
            const auto createdAt = QDateTime::fromString(object.value("created_at").toString(),
                                                         "ddd MMM dd HH:mm:ss +0000 yyyy");
            before = tweets.insert(before, Tweet{
            std::advance(before, 1);

© 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.