impl basic help command

src/main/java/cc/fascinated/bat/command/impl/HelpCommand.java

@@ -0,0 +1,89 @@
+package cc.fascinated.bat.command.impl;
+
+import cc.fascinated.bat.Consts;
+import cc.fascinated.bat.command.BatCommand;
+import cc.fascinated.bat.command.Category;
+import cc.fascinated.bat.common.EmbedUtils;
+import cc.fascinated.bat.event.EventListener;
+import cc.fascinated.bat.model.BatGuild;
+import cc.fascinated.bat.model.BatUser;
+import cc.fascinated.bat.service.CommandService;
+import lombok.NonNull;
+import net.dv8tion.jda.api.entities.Member;
+import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
+import net.dv8tion.jda.api.events.interaction.component.StringSelectInteractionEvent;
+import net.dv8tion.jda.api.interactions.commands.SlashCommandInteraction;
+import net.dv8tion.jda.api.interactions.components.ActionRow;
+import net.dv8tion.jda.api.interactions.components.buttons.Button;
+import net.dv8tion.jda.api.interactions.components.buttons.ButtonStyle;
+import net.dv8tion.jda.api.interactions.components.selections.SelectOption;
+import net.dv8tion.jda.api.interactions.components.selections.StringSelectMenu;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.util.Arrays;
+
+/**
+ * @author Fascinated (fascinated7)
+ */
+@Component
+public class HelpCommand extends BatCommand implements EventListener {
+    private final CommandService commandService;
+
+    @Autowired
+    public HelpCommand(@NonNull CommandService commandService) {
+        super("help", "View the bots command categories.");
+        this.commandService = commandService;
+    }
+
+    @Override
+    public void execute(BatGuild guild, @NonNull BatUser user, @NonNull MessageChannel channel, Member member, @NonNull SlashCommandInteraction interaction) {
+        String categories = "";
+        for (Category category : Category.values()) {
+            long commandCount = commandService.getCommands().values().stream().filter(command -> command.getCategory() == category).count();
+            categories += "**%s** - %s Commands\n".formatted(category.getName(), commandCount);
+        }
+
+        SelectOption[] options = Arrays.stream(Category.values()).map(category ->
+                        SelectOption.of(category.getName(), category.getName()).withEmoji(category.getEmoji()))
+                .toArray(SelectOption[]::new);
+
+        interaction.replyEmbeds(EmbedUtils.genericEmbed()
+                .setDescription("Here are the available command categories: \n\n" + categories)
+                .build()).addComponents(
+                ActionRow.of(
+                        Button.of(ButtonStyle.LINK, Consts.INVITE_URL, "Invite"),
+                        Button.of(ButtonStyle.LINK, Consts.SUPPORT_INVITE_URL, "Support")
+                ),
+                ActionRow.of(
+                        StringSelectMenu.create("help-menu")
+                                .addOptions(options)
+                                .build()
+                )
+        ).queue();
+    }
+
+    @Override
+    public void onStringSelectInteraction(BatGuild guild, @NonNull BatUser user, @NonNull StringSelectInteractionEvent event) {
+        Category category = Category.getByName(event.getSelectedOptions().get(0).getValue());
+        if (category == null) {
+            event.reply("Invalid category selected.").queue();
+            return;
+        }
+
+        String commands = "";
+        for (BatCommand command : commandService.getCommands().values()) {
+            if (command.getCategory() == category) {
+                commands += "</%s:%s> - %s\n".formatted(
+                        command.getName(),
+                        command.getCommandSnowflake(),
+                        command.getDescription()
+                );
+            }
+        }
+
+        event.editMessageEmbeds(EmbedUtils.genericEmbed()
+                .setDescription("The available commands in the **%s** category: \n\n%s".formatted(category.getName(), commands))
+                .build()).queue();
+    }
+}