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/*
* Copyright (c) 2015-2017 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Disco/FeatureOracle.h>
#include <algorithm>
#include <iterator>
#include <unordered_set>
#include <vector>
#include <Swiften/Base/Log.h>
#include <Swiften/Disco/EntityCapsProvider.h>
#include <Swiften/Elements/Idle.h>
#include <Swiften/Elements/Presence.h>
#include <Swiften/FileTransfer/FileTransferManager.h>
#include <Swiften/JID/JID.h>
#include <Swiften/Presence/PresenceOracle.h>
namespace Swift {
FeatureOracle::FeatureOracle(EntityCapsProvider* capsProvider, PresenceOracle* presenceOracle) : capsProvider_(capsProvider), presenceOracle_(presenceOracle) {
}
Tristate FeatureOracle::isFileTransferSupported(const JID& jid) {
Tristate fileTransferSupported = No;
auto isYesOrMaybe = [](Tristate tristate) { return tristate == Yes || tristate == Maybe; };
auto isYes = [](Tristate tristate) { return tristate == Yes; };
auto supportedFeatures = getFeaturesForJID(jid);
auto jingleSupported = isFeatureSupported(supportedFeatures, DiscoInfo::JingleFeature);
auto jingleFTSupported = isFeatureSupported(supportedFeatures, DiscoInfo::JingleFTFeature);
auto jingleTransportIBBSupported = isFeatureSupported(supportedFeatures, DiscoInfo::JingleTransportsIBBFeature);
auto jingleTransportS5BSupported = isFeatureSupported(supportedFeatures, DiscoInfo::JingleTransportsS5BFeature);
if (isYes(jingleSupported) && isYes(jingleFTSupported) && (isYes(jingleTransportIBBSupported) || isYes(jingleTransportS5BSupported))) {
fileTransferSupported = Yes;
}
else if (isYesOrMaybe(jingleSupported) && isYesOrMaybe(jingleFTSupported) && (isYesOrMaybe(jingleTransportIBBSupported) || isYesOrMaybe(jingleTransportS5BSupported))) {
fileTransferSupported = Maybe;
}
return fileTransferSupported;
}
Tristate FeatureOracle::isMessageReceiptsSupported(const JID& jid) {
return isFeatureSupported(getFeaturesForJID(jid), DiscoInfo::MessageDeliveryReceiptsFeature);
}
Tristate FeatureOracle::isMessageCorrectionSupported(const JID& jid) {
return isFeatureSupported(getFeaturesForJID(jid), DiscoInfo::MessageCorrectionFeature);
}
Tristate FeatureOracle::isWhiteboardSupported(const JID& jid) {
return isFeatureSupported(getFeaturesForJID(jid), DiscoInfo::WhiteboardFeature);
}
class PresenceFeatureAvailablityComparator {
public:
static int preferenceFromStatusShow(StatusShow::Type showType) {
switch (showType) {
case StatusShow::FFC:
return 5;
case StatusShow::Online:
return 4;
case StatusShow::DND:
return 3;
case StatusShow::Away:
return 2;
case StatusShow::XA:
return 1;
case StatusShow::None:
return 0;
}
assert(false);
return -1;
}
static int compareWithoutResource(const Presence::ref& a, const Presence::ref& b) {
int aPreference = preferenceFromStatusShow(a->getShow());
int bPreference = preferenceFromStatusShow(b->getShow());
if (aPreference != bPreference) {
return aPreference < bPreference ? 1 : -1;
}
Idle::ref aIdle = a->getPayload<Idle>();
Idle::ref bIdle = b->getPayload<Idle>();
if (aIdle && !bIdle) {
return -1;
}
else if (!aIdle && bIdle) {
return 1;
}
if (a->getPriority() != b->getPriority()) {
return a->getPriority() < b->getPriority() ? 1 : -1;
}
return 0;
}
/*
* This method returns true, if \ref Presence \p b is more available than
* \ref Presence \p a.
* Going by \ref StatusShow::Type first, then by idle state, then by
* presence priority and finally by resource name.
*/
bool operator()(const Presence::ref& a, const Presence::ref& b) {
int aMoreAvailableThanB = compareWithoutResource(a, b);
if (aMoreAvailableThanB < 0) {
return true;
}
else if (aMoreAvailableThanB > 0) {
return false;
}
return a->getFrom().getResource() < b->getFrom().getResource();
}
};
JID FeatureOracle::getMostAvailableClientForFileTrasfer(const JID& bareJID) {
JID fullJID;
assert(bareJID.isBare());
std::vector<Presence::ref> allPresences = presenceOracle_->getAllPresence(bareJID);
std::sort(allPresences.begin(), allPresences.end(), PresenceFeatureAvailablityComparator());
for (const auto& presence : allPresences) {
if (presence->isAvailable()) {
if (isFileTransferSupported(presence->getFrom()) == Yes) {
fullJID = presence->getFrom();
break;
}
}
}
SWIFT_LOG_ASSERT(!fullJID.isBare(), error);
return fullJID;
}
std::unordered_map<std::string, Tristate> FeatureOracle::getFeaturesForJID(const JID& jid) {
std::unordered_map<std::string, Tristate> supportedFeatures;
if (jid.isBare()) {
// Calculate the union of disco features of all most available results and return that.
std::vector<DiscoInfo::ref> onlineDiscoInfos;
std::unordered_set<std::string> features;
// Collect relevant disco info results and the set of features.
for (auto&& presence : presenceOracle_->getAllPresence(jid)) {
if (presence->getType() == Presence::Available) {
DiscoInfo::ref presenceDiscoInfo = capsProvider_->getCapsCached(presence->getFrom());
if (presenceDiscoInfo) {
onlineDiscoInfos.push_back(presenceDiscoInfo);
features.insert(presenceDiscoInfo->getFeatures().begin(), presenceDiscoInfo->getFeatures().end());
}
}
}
// Calculate supportedFeaturesMap.
for (auto&& feature : features) {
Tristate supported = Yes;
for (auto&& discoInfo : onlineDiscoInfos) {
if (!discoInfo->hasFeature(feature)) {
supported = Maybe;
break;
}
}
supportedFeatures[feature] = supported;
}
}
else {
// Return the disco result of the full JID.
auto discoInfo = capsProvider_->getCapsCached(jid);
if (discoInfo) {
for (auto&& feature : discoInfo->getFeatures()) {
supportedFeatures[feature] = Yes;
}
}
}
return supportedFeatures;
}
Tristate FeatureOracle::isFeatureSupported(const std::unordered_map<std::string, Tristate>& supportedFeatures, const std::string& feature) {
Tristate supported = No;
auto lookupResult = supportedFeatures.find(feature);
if (lookupResult != supportedFeatures.end()) {
supported = lookupResult->second;
}
return supported;
}
}
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Swift