QXmpp  Version: 1.10.4
QXmppPep_p.h
1 // SPDX-FileCopyrightText: 2021 Linus Jahn <lnj@kaidan.im>
2 //
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 
5 #include <QXmppPubSubEvent.h>
6 #include <QXmppPubSubManager.h>
7 
8 namespace QXmpp::Private::Pep {
9 
10 template<typename T>
11 using GetResult = std::variant<T, QXmppError>;
12 using PublishResult = std::variant<QString, QXmppError>;
13 
14 template<typename ItemT>
15 inline QXmppTask<GetResult<ItemT>> request(QXmppPubSubManager *pubSub, const QString &jid, const QString &nodeName, QObject *parent)
16 {
17  using PubSub = QXmppPubSubManager;
18 
19  auto process = [](PubSub::ItemsResult<ItemT> &&result) -> GetResult<ItemT> {
20  if (const auto itemsResult = std::get_if<PubSub::Items<ItemT>>(&result)) {
21  if (!itemsResult->items.isEmpty()) {
22  return itemsResult->items.takeFirst();
23  }
24  return QXmppError { QStringLiteral("User has no published items."), {} };
25  } else {
26  return std::get<QXmppError>(std::move(result));
27  }
28  };
29  return chain<GetResult<ItemT>>(pubSub->requestItems<ItemT>(jid, nodeName), parent, process);
30 }
31 
32 // NodeName is a template parameter, so the right qstring comparison overload is used
33 // (if we used 'const QString &' as type, a 'const char *' string would be converted)
34 template<typename ItemT, typename NodeName, typename Manager, typename ReceivedSignal>
35 inline bool handlePubSubEvent(const QDomElement &element, const QString &pubSubService, const QString &eventNode, NodeName nodeName, Manager *manager, ReceivedSignal itemReceived)
36 {
37  if (eventNode == nodeName && QXmppPubSubEvent<ItemT>::isPubSubEvent(element)) {
39  event.parse(element);
40 
41  if (event.eventType() == QXmppPubSubEventBase::Items) {
42  if (!event.items().isEmpty()) {
43  (manager->*itemReceived)(pubSubService, event.items().constFirst());
44  } else {
45  (manager->*itemReceived)(pubSubService, {});
46  }
47  return true;
48  } else if (event.eventType() == QXmppPubSubEventBase::Retract) {
49  (manager->*itemReceived)(pubSubService, {});
50  return true;
51  }
52  }
53  return false;
54 }
55 
56 } // namespace QXmpp::Private::Pep
Definition: QXmppPep_p.h:8
Definition: QXmppError.h:17
Definition: QXmppTask.h:61
virtual void parse(const QDomElement &)=0
QVector< T > items() const
Definition: QXmppPubSubEvent.h:99
QXmppTask< ItemsResult< T > > requestItems(const QString &jid, const QString &nodeName)
Definition: QXmppPubSubManager.h:210
EventType eventType() const
Definition: QXmppPubSubEvent.cpp:104
Definition: QXmppOmemoManager.h:68
The QXmppPubSubEvent class represents a PubSub event notification as defined by XEP-0060: Publish-Sub...
Definition: QXmppPubSubEvent.h:77
The QXmppPubSubManager aims to provide publish-subscribe functionality as specified in XEP-0060: Publ...
Definition: QXmppPubSubManager.h:20