RegexBot/Modules/VoiceRoleSync/VoiceRoleSync.cs

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namespace RegexBot.Modules.VoiceRoleSync;
/// <summary>
/// Synchronizes a user's state in a voice channel with a role.
/// In other words: applies a role to a user entering a voice channel. Removes the role when exiting.
/// </summary>
[RegexbotModule]
public class VoiceRoleSync : RegexbotModule {
// TODO wishlist? specify multiple definitions - multiple channels associated with multiple roles.
public VoiceRoleSync(RegexbotClient bot) : base(bot) {
DiscordClient.UserVoiceStateUpdated += Client_UserVoiceStateUpdated;
}
private async Task Client_UserVoiceStateUpdated(SocketUser argUser, SocketVoiceState before, SocketVoiceState after) {
// Gather data.
if (argUser is not SocketGuildUser user) return; // not a guild user
var settings = GetGuildState<ModuleConfig>(user.Guild.Id);
if (settings == null) return; // not enabled here
async Task RemoveAllAssociatedRoles()
=> await user.RemoveRolesAsync(settings.GetTrackedRoles(user.Guild).Intersect(user.Roles));
if (after.VoiceChannel == null) {
// Not in any voice channel. Remove all roles being tracked by this instance. Clear.
await RemoveAllAssociatedRoles();
} else {
// In a voice channel, and...
if (after.IsDeafened || after.IsSelfDeafened) {
// Is defeaned, which is like not being in a voice channel for our purposes. Clear.
await RemoveAllAssociatedRoles();
} else {
var targetRole = settings.GetAssociatedRoleFor(after.VoiceChannel);
if (targetRole == null) {
// In an untracked voice channel. Clear.
await RemoveAllAssociatedRoles();
} else {
// In a tracked voice channel: Clear all except target, add target if needed.
await user.RemoveRolesAsync(settings.GetTrackedRoles(user.Guild)
.Where(role => role.Id != targetRole.Id)
.Intersect(user.Roles));
if (!user.Roles.Contains(targetRole)) await user.AddRoleAsync(targetRole);
}
}
}
}
public override Task<object?> CreateGuildStateAsync(ulong guildID, JToken config) {
if (config == null) return Task.FromResult<object?>(null);
if (config.Type != JTokenType.Object)
throw new ModuleLoadException("Configuration for this section is invalid.");
return Task.FromResult<object?>(new ModuleConfig((JObject)config));
}
}