Added user_id to message_reaction_add_t

[folle]

Adds an user_id field to message_reaction_add_t.
When we get the callback from adding a reaction in a DM, the payload is as follows:

{
	"t": "MESSAGE_REACTION_ADD",
	"s": 4,
	"op": 0,
	"d": {
		"user_id": "0000000000000000000",
		"type": 0,
		"message_id": "0000000000000000000",
		"message_author_id": "0000000000000000000",
		"emoji": {
			"name": "✅",
			"id": null
		},
		"channel_id": "0000000000000000",
		"burst": false
	}
}

This has no member or user information to fill the corresponding classes, making it impossible to get the user_id of the user that reacted.

Test code:

#include <cassert>
#include <memory>
#include <dpp/dpp.h>

#define TOKEN "ADD_BOT_TOKEN"
#define USER_ID ADD_USER_ID

class TestBot final {
public:
	TestBot() {
		bot_.on_ready([this](dpp::ready_t const& ready) { OnReady(ready); });
		bot_.on_message_reaction_add([this](dpp::message_reaction_add_t const& message_reaction_add) { OnMessageReactionAdd(message_reaction_add); });
	}
	~TestBot() = default;

	void Start() noexcept {
		bot_.start(dpp::st_wait);
	}

private:
	void OnMessageReactionAdd(dpp::message_reaction_add_t const& message_reaction_add) noexcept {
		assert(message_reaction_add.user_id == bot_.me.id);
	}

	void OnReady(dpp::ready_t const& ready) noexcept {
		bot_.direct_message_create(USER_ID, dpp::message("Test"), [this](dpp::confirmation_callback_t const& confirmation_callback) {
			auto const sent_message = confirmation_callback.get<dpp::message>();
			bot_.message_add_reaction(sent_message, "✅");
		});
	}

private:
	dpp::cluster bot_ = dpp::cluster(TOKEN, dpp::i_default_intents);
};

int main(const int argc, char const* const* const argv) {
	TestBot bot;
	bot.Start();

	return 0;
}

Code change checklist

• I have ensured that all methods and functions are fully documented using doxygen style comments.
• My code follows the coding style guide.
• I tested that my change works before raising the PR.
• I have ensured that I did not break any existing API calls.
• I have not built my pull request using AI, a static analysis tool or similar without any human oversight.

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[braindigitalis]

message_reaction_add_t has reacting_user, which contains an id attribute. This is filled if you have the guild members intent. Is this not filled for you?

If there is no member, then you should fill the reacting_user.id with the received user_id, instead of creating a new attribute, this way it works in all situations.

See: https://discord.com/developers/docs/events/gateway-events#message-reaction-add

[folle]

message_reaction_add_t has reacting_user, which contains an id attribute. This is filled if you have the guild members intent. Is this not filled for you?

If there is no member, then you should fill the reacting_user.id with the received user_id, instead of creating a new attribute, this way it works in all situations.

See: https://discord.com/developers/docs/events/gateway-events#message-reaction-add

It doesn't get filled for me, even with the guild members intent.
I added a new field because I saw that typing_start_t has both user_id and typing_user. I will update the PR to use reacting_user

[folle]

Updated test code

#include <cassert>
#include <memory>
#include <dpp/dpp.h>

#define TOKEN "ADD_BOT_TOKEN"
#define USER_ID ADD_USER_ID

class TestBot final {
public:
	TestBot() {
		bot_.on_ready([this](dpp::ready_t const& ready) { OnReady(ready); });
		bot_.on_message_reaction_add([this](dpp::message_reaction_add_t const& message_reaction_add) { OnMessageReactionAdd(message_reaction_add); });
	}
	~TestBot() = default;

	void Start() noexcept {
		bot_.start(dpp::st_wait);
	}

private:
	void OnMessageReactionAdd(dpp::message_reaction_add_t const& message_reaction_add) noexcept {
		assert(message_reaction_add.reacting_user.id == bot_.me.id);
	}

	void OnReady(dpp::ready_t const& ready) noexcept {
		bot_.direct_message_create(USER_ID, dpp::message("Test"), [this](dpp::confirmation_callback_t const& confirmation_callback) {
			auto const sent_message = confirmation_callback.get<dpp::message>();
			bot_.message_add_reaction(sent_message, "✅");
		});
	}

private:
	dpp::cluster bot_ = dpp::cluster(TOKEN, dpp::i_all_intents);
};

int main(const int argc, char const* const* const argv) {
	TestBot bot;
	bot.Start();

	return 0;
}