squawk/shared/trustsummary.cpp

141 lines
4.2 KiB
C++

// Squawk messenger.
// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "trustsummary.h"
const std::set<Shared::TrustLevel> Shared::TrustSummary::trustedLevels({
Shared::TrustLevel::authenticated,
Shared::TrustLevel::automaticallyTrusted,
Shared::TrustLevel::manuallyTrusted
});
const std::set<Shared::TrustLevel> Shared::TrustSummary::untrustedLevels({
Shared::TrustLevel::undecided,
Shared::TrustLevel::automaticallyDistrusted,
Shared::TrustLevel::manuallyDistrusted
});
Shared::TrustSummary::TrustSummary():
data()
{}
void Shared::TrustSummary::set(Shared::EncryptionProtocol protocol, Shared::TrustLevel level, uint8_t amount) {
Data::iterator itr = data.find(protocol);
if (itr == data.end()) {
if (amount == 0)
return;
itr = data.insert(std::make_pair(protocol, Amounts())).first;
}
Amounts& am = itr->second;
Amounts::iterator aitr = am.find(level);
if (aitr == am.end()) {
if (amount == 0)
return;
am.emplace(level, amount);
return;
}
if (amount == 0) {
if (am.size() == 1)
data.erase(itr);
else
am.erase(aitr);
return;
}
aitr->second = amount;
}
uint8_t Shared::TrustSummary::amount(Shared::EncryptionProtocol protocol, Shared::TrustLevel level) const {
Data::const_iterator itr = data.find(protocol);
if (itr == data.end())
return 0;
const Amounts& am = itr->second;
Amounts::const_iterator aitr = am.find(level);
if (aitr == am.end())
return 0;
return aitr->second;
}
uint8_t Shared::TrustSummary::increment(Shared::EncryptionProtocol protocol, Shared::TrustLevel level) {
Data::iterator itr = data.find(protocol);
if (itr == data.end())
itr = data.insert(std::make_pair(protocol, Amounts())).first;
Amounts& am = itr->second;
Amounts::iterator aitr = am.find(level);
if (aitr == am.end()) {
am.emplace(level, 1);
return 1;
}
uint8_t& value = aitr->second;
return ++value;
}
uint8_t Shared::TrustSummary::decrement(Shared::EncryptionProtocol protocol, Shared::TrustLevel level) {
Data::iterator itr = data.find(protocol);
if (itr == data.end())
return 0; //should never happen, shall I better throw an exception?
Amounts& am = itr->second;
Amounts::iterator aitr = am.find(level);
if (aitr == am.end())
return 0; //should never happen, shall I better throw an exception?
uint8_t& value = aitr->second;
uint8_t result = --value;
if (value == 0) {
if (am.size() == 1)
data.erase(itr);
else
am.erase(aitr);
}
return result;
}
bool Shared::TrustSummary::hasKeys(Shared::EncryptionProtocol protocol) const {
return data.count(protocol) > 0;
}
bool Shared::TrustSummary::hasTrustedKeys(Shared::EncryptionProtocol protocol) const {
Data::const_iterator itr = data.find(protocol);
if (itr == data.end())
return false;
for (const std::pair<const TrustLevel, uint8_t>& pair : itr->second) {
if (trustedLevels.count(pair.first) > 0)
return true;
}
return false;
}
bool Shared::TrustSummary::hasUntrustedKeys(Shared::EncryptionProtocol protocol) const {
Data::const_iterator itr = data.find(protocol);
if (itr == data.end())
return false;
for (const std::pair<const TrustLevel, uint8_t>& pair : itr->second) {
if (untrustedLevels.count(pair.first) > 0)
return true;
}
return false;
}