BuyCommand.java

package technobot.commands.economy;

import net.dv8tion.jda.api.EmbedBuilder;
import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
import net.dv8tion.jda.api.interactions.commands.OptionType;
import net.dv8tion.jda.api.interactions.commands.build.OptionData;
import org.apache.commons.lang3.StringUtils;
import technobot.TechnoBot;
import technobot.commands.Category;
import technobot.commands.Command;
import technobot.data.GuildData;
import technobot.data.cache.Item;
import technobot.handlers.economy.EconomyHandler;
import technobot.util.embeds.EmbedColor;
import technobot.util.embeds.EmbedUtils;
import technobot.util.placeholders.Placeholder;
import technobot.util.placeholders.PlaceholderFactory;

import static technobot.util.Localization.get;

/**
 * Command that buys an item from the server shop.
 *
 * @author TechnoVision
 */
public class BuyCommand extends Command {

    public BuyCommand(TechnoBot bot) {
        super(bot);
        this.name = "buy";
        this.description = "Purchase an item from the shop.";
        this.category = Category.ECONOMY;
        this.args.add(new OptionData(OptionType.STRING, "item", "The name of the item to purchase", true));
    }

    @Override
    public void execute(SlashCommandInteractionEvent event) {
        GuildData guildData = GuildData.get(event.getGuild());
        EconomyHandler econ = guildData.economyHandler;

        // Get item data
        String itemName = event.getOption("item").getAsString();
        Item item = guildData.configHandler.getItem(itemName);
        if (item == null) {
            event.replyEmbeds(EmbedUtils.createError(
                    get(s -> s.economy.buy.noItem)
            )).setEphemeral(true).queue();
            return;
        }

        // Attempt to purchase item
        long balance = econ.getBalance(event.getUser().getIdLong());
        if (balance >= item.getPrice()) {
            // Check expiration timestamp & stock
            if (item.checkIfExpired()) {
                event.replyEmbeds(EmbedUtils.createError("That item has expired and is no longer purchasable.")).setEphemeral(true).queue();
                return;
            } else if (item.getStock() != null && item.getStock() <= 0) {
                event.replyEmbeds(EmbedUtils.createError("There is not enough stock for you to buy this item.")).setEphemeral(true).queue();
                return;
            }

            // Purchase was successful
            econ.buyItem(event.getUser().getIdLong(), item);
            if (item.getShowInInventory()) {
                String text = get(s -> s.economy.buy.success, item.getName(), item.getPrice());
                EmbedBuilder embed = new EmbedBuilder()
                        .setColor(EmbedColor.SUCCESS.color)
                        .setAuthor(event.getUser().getAsTag(), null, event.getUser().getEffectiveAvatarUrl())
                        .setDescription(text);
                event.replyEmbeds(embed.build()).queue();
            } else {
                // Instantly use item
                if (!econ.canUseItem(event.getMember(), item)) {
                    // Does not meet requirements
                    event.replyEmbeds(EmbedUtils.createError("You do not meet the requirements to use that item! Use `/inspect <item>` for more details.")).setEphemeral(true).queue();
                } else {
                    // Use item
                    econ.useItem(event.getMember(), item, 0);
                    Placeholder placeholder = PlaceholderFactory.fromSlashCommand(event).get();
                    String reply = (item.getReplyMessage() != null) ? item.getReplyMessage() : ":thumbsup:";
                    event.reply(placeholder.parse(reply)).queue();
                }
            }
        } else {
            // Not enough money to purchase
            String text = get(s -> s.economy.buy.noMoney, EconomyHandler.FORMATTER.format(balance));
            EmbedBuilder embed = new EmbedBuilder().setDescription(EmbedUtils.RED_X + text).setColor(EmbedColor.ERROR.color);
            event.replyEmbeds(embed.build()).setEphemeral(true).queue();
        }
    }
}