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/*
* Copyright (c) 2010-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Disco/DiscoServiceWalker.h>
#include <boost/bind.hpp>
#include <Swiften/Base/Log.h>
#include <Swiften/Base/foreach.h>
namespace Swift {
DiscoServiceWalker::DiscoServiceWalker(const JID& service, IQRouter* iqRouter, size_t maxSteps) : service_(service), iqRouter_(iqRouter), maxSteps_(maxSteps), active_(false) {
}
void DiscoServiceWalker::beginWalk() {
SWIFT_LOG(debug) << "Starting walk to " << service_ << std::endl;
assert(!active_);
assert(servicesBeingSearched_.empty());
active_ = true;
walkNode(service_);
}
void DiscoServiceWalker::endWalk() {
if (active_) {
SWIFT_LOG(debug) << "Ending walk to " << service_ << std::endl;
foreach (GetDiscoInfoRequest::ref request, pendingDiscoInfoRequests_) {
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, request));
}
foreach (GetDiscoItemsRequest::ref request, pendingDiscoItemsRequests_) {
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, request));
}
active_ = false;
onWalkAborted();
}
}
void DiscoServiceWalker::walkNode(const JID& jid) {
SWIFT_LOG(debug) << "Walking node " << jid << std::endl;
servicesBeingSearched_.insert(jid);
searchedServices_.insert(jid);
GetDiscoInfoRequest::ref discoInfoRequest = GetDiscoInfoRequest::create(jid, iqRouter_);
discoInfoRequest->onResponse.connect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, discoInfoRequest));
pendingDiscoInfoRequests_.insert(discoInfoRequest);
discoInfoRequest->send();
}
void DiscoServiceWalker::handleDiscoInfoResponse(std::shared_ptr<DiscoInfo> info, ErrorPayload::ref error, GetDiscoInfoRequest::ref request) {
/* If we got canceled, don't do anything */
if (!active_) {
return;
}
SWIFT_LOG(debug) << "Disco info response from " << request->getReceiver() << std::endl;
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, request));
pendingDiscoInfoRequests_.erase(request);
if (error) {
handleDiscoError(request->getReceiver(), error);
return;
}
bool couldContainServices = false;
foreach (DiscoInfo::Identity identity, info->getIdentities()) {
if (identity.getCategory() == "server") {
couldContainServices = true;
}
}
bool completed = false;
if (couldContainServices) {
GetDiscoItemsRequest::ref discoItemsRequest = GetDiscoItemsRequest::create(request->getReceiver(), iqRouter_);
discoItemsRequest->onResponse.connect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, discoItemsRequest));
pendingDiscoItemsRequests_.insert(discoItemsRequest);
discoItemsRequest->send();
} else {
completed = true;
}
onServiceFound(request->getReceiver(), info);
if (completed) {
markNodeCompleted(request->getReceiver());
}
}
void DiscoServiceWalker::handleDiscoItemsResponse(std::shared_ptr<DiscoItems> items, ErrorPayload::ref error, GetDiscoItemsRequest::ref request) {
/* If we got canceled, don't do anything */
if (!active_) {
return;
}
SWIFT_LOG(debug) << "Received disco items from " << request->getReceiver() << std::endl;
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, request));
pendingDiscoItemsRequests_.erase(request);
if (error) {
handleDiscoError(request->getReceiver(), error);
return;
}
foreach (DiscoItems::Item item, items->getItems()) {
if (item.getNode().empty()) {
/* Don't look at noded items. It's possible that this will exclude some services,
* but I've never seen one in the wild, and it's an easy fix for not looping.
*/
if (std::find(searchedServices_.begin(), searchedServices_.end(), item.getJID()) == searchedServices_.end()) { /* Don't recurse infinitely */
SWIFT_LOG(debug) << "Received disco item " << item.getJID() << std::endl;
walkNode(item.getJID());
}
}
}
markNodeCompleted(request->getReceiver());
}
void DiscoServiceWalker::handleDiscoError(const JID& jid, ErrorPayload::ref /*error*/) {
SWIFT_LOG(debug) << "Disco error from " << jid << std::endl;
markNodeCompleted(jid);
}
void DiscoServiceWalker::markNodeCompleted(const JID& jid) {
SWIFT_LOG(debug) << "Node completed " << jid << std::endl;
servicesBeingSearched_.erase(jid);
/* All results are in */
if (servicesBeingSearched_.empty()) {
active_ = false;
onWalkComplete();
}
/* Check if we're on a rampage */
else if (searchedServices_.size() >= maxSteps_) {
active_ = false;
onWalkComplete();
}
}
}
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Swift