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event.cpp
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event.cpp
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/*
* This file is part of libkazv.
* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include "libkazv-config.hpp"
#include <optional>
#include "event.hpp"
#include "json-utils.hpp"
namespace Kazv
{
const JsonWrap Event::notYetDecryptedEvent = {
json{{"type", "m.room.message"},
{"content", {
{"msgtype", "xyz.tusooa.kazv.not.yet.decrypted"},
{"body", "**This message has not yet been decrypted.**"}}}}};
Event::Event() : m_json(json::object()) {}
Event::Event(JsonWrap j)
: m_json(j) {
using namespace std::string_literals;
if (m_json.get().contains("type"s)) {
auto type = m_json.get().at("type"s).get<std::string>();
if (type == "m.room.encrypted"s) {
m_encrypted = true;
m_decryptedJson = notYetDecryptedEvent;
}
}
}
Event Event::fromSync(Event e, std::string roomId) {
auto j = e.originalJson().get();
j["room_id"] = roomId;
return Event(j);
}
std::string Event::id() const {
// the decrypted json does not have an event id
return originalJson().get().contains("event_id")
? originalJson().get().at("event_id")
: "";
}
std::string Event::sender() const {
return originalJson().get().contains("sender")
? originalJson().get().at("sender")
: "";
}
Timestamp Event::originServerTs() const {
return (originalJson().get().contains("origin_server_ts")
&& originalJson().get().at("origin_server_ts").is_number())
? originalJson().get().at("origin_server_ts").template get<Timestamp>()
: 0;
}
std::string Event::type() const {
return raw().get().contains("type")
? raw().get().at("type")
: "";
}
JsonWrap Event::content() const {
return raw().get().contains("content")
? raw().get().at("content")
: json::object();
}
std::string Event::stateKey() const {
return raw().get().contains("state_key")
? raw().get().at("state_key")
: "";
}
bool Event::isState() const
{
return raw().get().contains("state_key");
}
/// returns the decrypted json
JsonWrap Event::raw() const {
return m_encrypted ? decryptedJson() : m_json;
}
/// returns the original json we fetched, probably encrypted.
JsonWrap Event::originalJson() const {
return m_json;
}
JsonWrap Event::decryptedJson() const {
return m_decryptedJson;
}
bool Event::encrypted() const {
return m_encrypted;
}
bool Event::decrypted() const {
return m_decrypted == Decrypted;
}
Event Event::setDecryptedJson(JsonWrap decryptedJson, DecryptionStatus decrypted) const {
Event e(*this);
e.m_decryptedJson = decryptedJson;
e.m_decrypted = decrypted;
return e;
}
bool Event::redacted() const
{
auto ptr = nlohmann::json_pointer<std::string>("/unsigned/redacted_because");
return originalJson().get().contains(ptr)
&& originalJson().get()[ptr].is_object();
}
std::string Event::replyingTo() const
{
auto [relType, eventId] = relationship();
if (relType == "m.in_reply_to") {
return eventId;
}
return "";
}
static std::optional<std::pair<std::string, std::string>> getRel(const json &eventJson)
{
if (!hasAtThat(eventJson, "content", &json::is_object)) {
return std::nullopt;
}
auto content = eventJson["content"];
if (hasAtThat(content, "m.relates_to", &json::is_object)) {
if (hasAtThat(content["m.relates_to"], "event_id", &json::is_string)
&& hasAtThat(content["m.relates_to"], "rel_type", &json::is_string)) {
return std::make_pair(
content["m.relates_to"]["rel_type"].template get<std::string>(),
content["m.relates_to"]["event_id"].template get<std::string>()
);
} else if (hasAtThat(content["m.relates_to"], "m.in_reply_to", &json::is_object)
&& hasAtThat(content["m.relates_to"]["m.in_reply_to"], "event_id", &json::is_string)) {
return std::make_pair(
std::string("m.in_reply_to"),
content["m.relates_to"]["m.in_reply_to"]["event_id"].template get<std::string>()
);
}
}
return std::nullopt;
}
std::pair<std::string/* relType */, std::string/* eventId */> Event::relationship() const
{
std::optional<std::pair<std::string/* relType */, std::string/* eventId */>> relOpt;
if ((relOpt = getRel(originalJson().get())).has_value()) {
return relOpt.value();
} else if (encrypted() && (relOpt = getRel(raw().get())).has_value()) {
return relOpt.value();
}
return {"", ""};
}
JsonWrap Event::mRelatesTo() const
{
if (hasAtThat(originalJson().get(),
"/content/m.relates_to"_json_pointer,
&json::is_object)) {
return originalJson().get()["/content/m.relates_to"_json_pointer];
} else if (encrypted() && hasAtThat(raw().get(),
"/content/m.relates_to"_json_pointer,
&json::is_object)) {
return raw().get()["/content/m.relates_to"_json_pointer];
}
return json::object();
}
bool operator==(const Event &a, const Event &b)
{
return a.id() == b.id()
&& a.originalJson() == b.originalJson()
&& a.raw() == b.raw();
}
}

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