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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "paginatedresource.h"
#include <QtNetwork/qrestaccessmanager.h>
#include <QtNetwork/qrestreply.h>
#include <QtCore/qjsonarray.h>
#include <QtCore/qjsondocument.h>
#include <QtCore/qjsonobject.h>
#include <QtCore/qurlquery.h>
using namespace Qt::StringLiterals;
static constexpr auto totalPagesField = "total_pages"_L1;
static constexpr auto currentPageField = "page"_L1;
static constexpr auto resourceId = "/%1"_L1;
PaginatedResource::PaginatedResource(QObject *parent)
: AbstractResource(parent)
{
}
QList<QJsonObject> PaginatedResource::data() const
{
return m_data;
}
int PaginatedResource::pages() const
{
return m_pages;
}
int PaginatedResource::page() const
{
return m_currentPage;
}
void PaginatedResource::setPage(int page)
{
if (m_currentPage == page || page < 1)
return;
m_currentPage = page;
emit pageUpdated();
refreshCurrentPage();
}
void PaginatedResource::refreshCurrentPage()
{
QUrlQuery query{{"page"_L1, QString::number(m_currentPage)}};
m_manager->get(m_api->createRequest(m_path, query), this, [this](QRestReply &reply) {
if (const auto json = reply.readJson()) {
refreshRequestFinished(*json);
} else {
refreshRequestFailed();
}
});
}
void PaginatedResource::refreshRequestFinished(const QJsonDocument &json)
{
m_data.clear();
const QJsonArray data = json["data"_L1].toArray();
for (const auto &entry : data)
m_data.append(entry.toObject());
m_pages = json[totalPagesField].toInt();
m_currentPage = json[currentPageField].toInt();
emit pageUpdated();
emit pagesUpdated();
emit dataUpdated();
}
void PaginatedResource::refreshRequestFailed()
{
if (m_currentPage != 1) {
// A failed refresh. If we weren't on page 1, try that.
// Last resource on currentPage might have been deleted, causing a failure
setPage(1);
} else {
// Refresh failed and we we're already on page 1 => clear data
m_pages = 0;
emit pagesUpdated();
if (!m_data.isEmpty()) {
m_data.clear();
emit dataUpdated();
}
}
}
void PaginatedResource::update(const QVariantMap &data, int id)
{
m_manager->put(m_api->createRequest(m_path + resourceId.arg(QString::number(id))), data,
this, [this](QRestReply &reply) {
if (reply.isSuccess())
refreshCurrentPage();
});
}
void PaginatedResource::add(const QVariantMap &data)
{
m_manager->post(m_api->createRequest(m_path), data, this, [this](QRestReply &reply) {
if (reply.isSuccess())
refreshCurrentPage();
});
}
void PaginatedResource::remove(int id)
{
m_manager->deleteResource(m_api->createRequest(m_path + resourceId.arg(QString::number(id))),
this, [this](QRestReply &reply) {
if (reply.isSuccess())
refreshCurrentPage();
});
}
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