D++ (DPP)
C++ Discord API Bot Library
Join or switch to the voice channel of the user issuing a command

When a user issues a command you may want to join their voice channel, e.g. in a music bot. If you are already on the same voice channel, the bot should do nothing (but be ready to instantly play audio) and if the user is on a different voice channel, the bot should switch to it. If the user is on no voice channel at all, this should be considered an error. This example shows how to do this.

Note
Please be aware this example sends no audio, but indicates clearly in the comments where and how you should do so.
#include <dpp/dpp.h>
#include <iomanip>
#include <sstream>
int main(int argc, char const *argv[])
{
/* Setup the bot */
dpp::cluster bot("token");
/* Use the on_message_create event to look for commands */
bot.on_message_create([&bot, robot, robot_size](const dpp::message_create_t & event) {
std::stringstream ss(event.msg.content);
std::string command;
ss >> command;
/* Switch to or join the vc the user is on. Syntax: .join */
if (command == ".join") {
auto current_vc = event.from->get_voice(event.msg.guild_id);
bool join_vc = true;
/* Check if we are currently on any vc */
if (current_vc) {
/* Find the channel id that the user is currently on */
auto users_vc = g->voice_members.find(event.msg.author.id);
/* See if we currently share a channel with the user */
if (users_vc != g->voice_members.end() && current_vc->channel_id == users_vc->second.channel_id) {
join_vc = false;
/* We are on this voice channel, at this point we can send any audio instantly to vc:
* current_vc->send_audio_raw(...)
*/
} else {
/* We are on a different voice channel. Leave it, then join the new one
* by falling through to the join_vc branch below.
*/
event.from->disconnect_voice(event.msg.guild_id);
join_vc = true;
}
}
/* If we need to join a vc at all, join it here if join_vc == true */
if (join_vc) {
if (!g->connect_member_voice(event.msg.author.id)) {
/* The user issuing the command is not on any voice channel, we can't do anything */
bot.message_create(dpp::message(channel_id, "You don't seem to be on a voice channel! :("));
} else {
/* We are now connecting to a vc. Wait for on_voice_ready
* event, and then send the audio within that event:
*
* event.voice_client->send_audio_raw(...);
*
* NOTE: We can't instantly send audio, as we have to wait for
* the connection to the voice server to be established!
*/
}
}
}
});
/* Start bot */
bot.start(false);
return 0;
}
The cluster class represents a group of shards and a command queue for sending and receiving commands...
Definition: cluster.h:384
Represents a guild on Discord (AKA a server)
Definition: guild.h:358
bool connect_member_voice(snowflake user_id, bool self_mute=false, bool self_deaf=false)
Connect to a voice channel another guild member is in.
std::map< snowflake, voicestate > voice_members
Definition: guild.h:458
snowflake id
Unique ID of object set by Discord. This value contains a timestamp, worker ID, internal server ID,...
Definition: discord.h:48
DPP_EXPORT guild * find_guild(snowflake id)
Create message.
Definition: dispatcher.h:1156
message msg
message that was created (sent).
Definition: dispatcher.h:1165
Represents messages sent and received on Discord.
Definition: message.h:1010
user author
Definition: message.h:1016
snowflake guild_id
Definition: message.h:1014
std::string content
Definition: message.h:1020
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