Bat/src/main/java/cc/fascinated/bat/service/CommandService.java

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package cc.fascinated.bat.service;
import cc.fascinated.bat.command.BatCommand;
import cc.fascinated.bat.command.BatCommandExecutor;
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import cc.fascinated.bat.command.BatSubCommand;
import cc.fascinated.bat.common.EmbedUtils;
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import cc.fascinated.bat.model.BatGuild;
import cc.fascinated.bat.model.BatUser;
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import lombok.NonNull;
import lombok.extern.log4j.Log4j2;
import net.dv8tion.jda.api.JDA;
import net.dv8tion.jda.api.Permission;
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import net.dv8tion.jda.api.entities.Guild;
import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
import net.dv8tion.jda.api.hooks.ListenerAdapter;
import org.jetbrains.annotations.NotNull;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.DependsOn;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
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import java.util.HashMap;
import java.util.List;
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import java.util.Map;
/**
* @author Fascinated (fascinated7)
*/
@Service
@Log4j2
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@DependsOn("discordService")
public class CommandService extends ListenerAdapter {
/**
* The registered commands
*/
private final Map<String, BatCommand> commands = new HashMap<>();
/**
* The guild service to use
*/
private final GuildService guildService;
/**
* The user service to use
*/
private final UserService userService;
@Autowired
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public CommandService(@NonNull GuildService guildService, @NonNull UserService userService) {
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this.guildService = guildService;
this.userService = userService;
DiscordService.JDA.addEventListener(this);
}
/**
* Registers a command
*
* @param command The command to register
*/
public void registerCommand(@NonNull BatCommand command) {
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if (commands.get(command.getName().toLowerCase()) != null) {
return;
}
log.info("Registered command \"{}\"", command.getName());
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commands.put(command.getName().toLowerCase(), command);
}
/**
* Registers all slash commands
*/
public void registerSlashCommands() {
log.info("Registering all slash commands");
JDA jda = DiscordService.JDA;
long before = System.currentTimeMillis();
// Unregister all commands that Discord has but we don't
jda.retrieveCommands().complete().forEach(command -> {
if (commands.containsKey(command.getName())) {
return;
}
jda.deleteCommandById(command.getId()).complete(); // Unregister the command on Discord
log.info("Unregistered unknown command \"{}\" from Discord", command.getName());
});
// Register all commands
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jda.updateCommands().addCommands(commands.values().stream().map(BatCommand::getCommandData).toList()).complete();
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log.info("Registered all slash commands in {}ms", System.currentTimeMillis() - before);
}
@Override
public void onSlashCommandInteraction(@NotNull SlashCommandInteractionEvent event) {
Guild discordGuild = event.getGuild();
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if (event.getUser().isBot()) {
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return;
}
String commandName = event.getName();
BatCommand command = commands.get(commandName);
if (command == null) {
return;
}
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boolean ranInsideGuild = discordGuild != null;
BatGuild guild = ranInsideGuild ? guildService.getGuild(discordGuild.getId()) : null;
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BatUser user = userService.getUser(event.getUser().getId());
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try {
BatCommandExecutor executor = null;
List<Permission> requiredPermissions = new ArrayList<>();
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// No args provided, use the main command executor
if (event.getInteraction().getSubcommandName() == null) {
executor = command;
requiredPermissions.addAll(command.getRequiredPermissions());
} else {
// Subcommand provided, use the subcommand executor
for (Map.Entry<String, BatSubCommand> subCommand : command.getSubCommands().entrySet()) {
if (subCommand.getKey().equalsIgnoreCase(event.getInteraction().getSubcommandName())) {
executor = subCommand.getValue();
requiredPermissions.addAll(subCommand.getValue().getRequiredPermissions());
requiredPermissions.addAll(command.getRequiredPermissions()); // not sure if we'd want this, but it's here for now
break;
}
}
}
if (executor == null) {
event.replyEmbeds(EmbedUtils.errorEmbed()
.setDescription("Unable to find a command executor the command name ):")
.build()).queue();
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return;
}
// Check if the user has the required permissions
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if (ranInsideGuild && event.getMember() != null) {
List<Permission> missingPermissions = new ArrayList<>();
for (Permission permission : requiredPermissions) {
if (!event.getMember().hasPermission(permission)) {
missingPermissions.add(permission);
}
}
if (!missingPermissions.isEmpty()) {
event.replyEmbeds(EmbedUtils.errorEmbed()
.setDescription("You are missing the following permissions to execute this command: " + missingPermissions)
.build())
.setEphemeral(true)
.queue();
return;
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}
}
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log.info("Executing command \"{}\" for user \"{}\"", commandName, user.getDiscordUser().getName());
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executor.execute(guild, user, ranInsideGuild ? event.getChannel().asTextChannel() : event.getChannel().asPrivateChannel(),
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event.getMember(), event.getInteraction());
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} catch (Exception ex) {
log.error("An error occurred while executing command \"{}\"", commandName, ex);
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event.replyEmbeds(EmbedUtils.successEmbed()
.setDescription("An error occurred while executing the command\n\n" + ex.getLocalizedMessage())
.build())
.queue();
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}
}
}