jami_contact.h

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/*
 *  Copyright (C) 2004-2026 Savoir-faire Linux Inc.
 *
 *  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 <https://www.gnu.org/licenses/>.
 */
#pragma once
 
#include "string_utils.h"
 
#include <opendht/infohash.h>
#include <opendht/value.h>
#include <opendht/default_types.h>
 
#include <msgpack.hpp>
#include <json/json.h>
 
#include <map>
#include <string>
#include <ctime>
 
namespace jami {
 
struct Contact
{
    time_t added {0};
 
    time_t removed {0};
 
    bool confirmed {false};
 
    bool banned {false};
 
    std::string conversationId {};
 
    bool isActive() const { return added > removed; }
    bool isBanned() const { return not isActive() and banned; }
 
    Contact() = default;
    Contact(const Json::Value& json)
    {
        added = json["added"].asLargestUInt();
        removed = json["removed"].asLargestUInt();
        confirmed = json["confirmed"].asBool();
        banned = json["banned"].asBool();
        conversationId = json["conversationId"].asString();
    }
 
    bool update(const Contact& c)
    {
        const auto copy = *this;
        auto isMoreRecent = std::max(c.added, c.removed) > std::max(added, removed);
        if (isMoreRecent) {
            added = c.added;
            removed = c.removed;
            banned = c.banned;
            conversationId = c.conversationId;
            confirmed = c.confirmed;
        } else if (isActive() && added == c.added) {
            confirmed = confirmed or c.confirmed;
        }
        return hasDifferentState(copy);
    }
 
    bool hasDifferentState(const Contact& other) const
    {
        return other.isActive() != isActive() or other.isBanned() != isBanned() or other.confirmed != confirmed;
    }
 
    Json::Value toJson() const
    {
        Json::Value json;
        json["added"] = Json::Int64(added);
        if (removed) {
            json["removed"] = Json::Int64(removed);
        }
        if (confirmed)
            json["confirmed"] = confirmed;
        if (banned)
            json["banned"] = banned;
        json["conversationId"] = conversationId;
        return json;
    }
 
    std::map<std::string, std::string> toMap() const
    {
        std::map<std::string, std::string> result {{"added", std::to_string(added)},
                                                   {"removed", std::to_string(removed)},
                                                   {"conversationId", conversationId}};
 
        if (isActive())
            result.emplace("confirmed", confirmed ? TRUE_STR : FALSE_STR);
        if (isBanned())
            result.emplace("banned", TRUE_STR);
 
        return result;
    }
 
    MSGPACK_DEFINE_MAP(added, removed, confirmed, banned, conversationId)
};
 
struct TrustRequest
{
    std::shared_ptr<dht::crypto::PublicKey> device;
    std::string conversationId;
    time_t received;
    std::vector<uint8_t> payload;
    MSGPACK_DEFINE_MAP(device, conversationId, received, payload)
};
 
struct DeviceAnnouncement : public dht::SignedValue<DeviceAnnouncement>
{
private:
    using BaseClass = dht::SignedValue<DeviceAnnouncement>;
 
public:
    static const constexpr dht::ValueType& TYPE = dht::ValueType::USER_DATA;
    dht::InfoHash dev;
    std::shared_ptr<dht::crypto::PublicKey> pk;
    MSGPACK_DEFINE_MAP(dev, pk)
};
 
struct KnownDeviceSync
{
    std::string name;
    MSGPACK_DEFINE_MAP(name)
};
 
struct DeviceSync : public dht::EncryptedValue<DeviceSync>
{
    static const constexpr dht::ValueType& TYPE = dht::ValueType::USER_DATA;
    uint64_t date;
    std::string device_name;
    std::map<dht::PkId, KnownDeviceSync> devices;
    std::map<dht::InfoHash, Contact> peers;
    std::map<dht::InfoHash, TrustRequest> trust_requests;
    MSGPACK_DEFINE_MAP(date, device_name, devices, peers, trust_requests)
};
 
struct KnownDevice
{
    using clock = std::chrono::system_clock;
    using time_point = clock::time_point;
 
    std::shared_ptr<dht::crypto::Certificate> certificate;
 
    std::string name {};
 
    time_point last_sync {time_point::min()};
 
    KnownDevice(const std::shared_ptr<dht::crypto::Certificate>& cert,
                const std::string& n = {},
                time_point sync = time_point::min())
        : certificate(cert)
        , name(n)
        , last_sync(sync)
    {}
};
 
} // namespace jami