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PlotSquared, a land and world management plugin for Minecraft.
There is a newer version: 7.4.0
/*
 * PlotSquared, a land and world management plugin for Minecraft.
 * Copyright (C) IntellectualSites 
 * Copyright (C) IntellectualSites team and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package com.plotsquared.core.command;

import com.plotsquared.core.configuration.caption.StaticCaption;
import com.plotsquared.core.configuration.caption.TranslatableCaption;
import com.plotsquared.core.player.PlotPlayer;
import com.plotsquared.core.util.MathMan;
import com.plotsquared.core.util.StringMan;
import com.plotsquared.core.util.helpmenu.HelpMenu;
import com.plotsquared.core.util.task.RunnableVal2;
import com.plotsquared.core.util.task.RunnableVal3;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.TextComponent;
import net.kyori.adventure.text.minimessage.tag.Tag;
import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.CompletableFuture;

@CommandDeclaration(command = "help",
        aliases = "?",
        category = CommandCategory.INFO,
        usage = "help [category | #]",
        permission = "plots.use")
public class Help extends Command {

    public Help(Command parent) {
        super(parent, true);
    }

    @Override
    public boolean canExecute(PlotPlayer player, boolean message) {
        return true;
    }

    @Override
    public CompletableFuture execute(
            PlotPlayer player, String[] args,
            RunnableVal3 confirm,
            RunnableVal2 whenDone
    ) {
        switch (args.length) {
            case 0 -> {
                return displayHelp(player, null, 0);
            }
            case 1 -> {
                if (MathMan.isInteger(args[0])) {
                    try {
                        return displayHelp(player, null, Integer.parseInt(args[0]));
                    } catch (NumberFormatException ignored) {
                        return displayHelp(player, null, 1);
                    }
                } else {
                    return displayHelp(player, args[0], 1);
                }
            }
            case 2 -> {
                if (MathMan.isInteger(args[1])) {
                    try {
                        return displayHelp(player, args[0], Integer.parseInt(args[1]));
                    } catch (NumberFormatException ignored) {
                        return displayHelp(player, args[0], 1);
                    }
                }
                return CompletableFuture.completedFuture(false);
            }
            default -> sendUsage(player);
        }
        return CompletableFuture.completedFuture(true);
    }

    public CompletableFuture displayHelp(
            final PlotPlayer player, final String catRaw,
            final int page
    ) {
        return CompletableFuture.supplyAsync(() -> {
            String cat = catRaw;

            CommandCategory catEnum = null;
            if (cat != null) {
                if (!"all".equalsIgnoreCase(cat)) {
                    for (CommandCategory c : CommandCategory.values()) {
                        if (StringMan.isEqualIgnoreCaseToAny(cat, c.name(), c.toString())) {
                            catEnum = c;
                            cat = c.name();
                            break;
                        }
                    }
                    if (catEnum == null) {
                        cat = null;
                    }
                }
            }
            if (cat == null && page == 0) {
                TextComponent.Builder builder = Component.text();
                builder.append(MINI_MESSAGE.deserialize(TranslatableCaption.of("help.help_header").getComponent(player)));
                for (CommandCategory c : CommandCategory.values()) {
                    if (!c.canAccess(player)) {
                        continue;
                    }
                    builder.append(Component.newline()).append(MINI_MESSAGE
                            .deserialize(
                                    TranslatableCaption.of("help.help_info_item").getComponent(player),
                                    TagResolver.builder()
                                            .tag("command", Tag.inserting(Component.text("/plot help")))
                                            .tag("category", Tag.inserting(Component.text(c.name().toLowerCase())))
                                            .tag("category_desc", Tag.inserting(c.toComponent(player)))
                                            .build()
                            ));
                }
                builder.append(Component.newline()).append(MINI_MESSAGE
                        .deserialize(
                                TranslatableCaption.of("help.help_info_item").getComponent(player),
                                TagResolver.builder()
                                        .tag("command", Tag.inserting(Component.text("/plot help")))
                                        .tag("category", Tag.inserting(Component.text("all")))
                                        .tag(
                                                "category_desc",
                                                Tag.inserting(TranslatableCaption
                                                        .of("help.help_display_all_commands")
                                                        .toComponent(player))
                                        )
                                        .build()
                        ));
                builder.append(Component.newline()).append(MINI_MESSAGE.deserialize(TranslatableCaption
                        .of("help.help_footer")
                        .getComponent(player)));
                player.sendMessage(StaticCaption.of(MINI_MESSAGE.serialize(builder.asComponent())));
                return true;
            }
            new HelpMenu(player).setCategory(catEnum).getCommands().generateMaxPages().generatePage(
                            page - 1,
                            getParent().toString(),
                            player
                    )
                    .render();
            return true;
        });
    }

    @Override
    public Collection tab(PlotPlayer player, String[] args, boolean space) {
        final String argument = args[0].toLowerCase(Locale.ENGLISH);
        List result = new ArrayList<>();

        for (final CommandCategory category : CommandCategory.values()) {
            if (!category.canAccess(player)) {
                continue;
            }
            String name = category.name().toLowerCase();
            if (!name.startsWith(argument)) {
                continue;
            }
            result.add(new Command(null, false, name, "", RequiredType.NONE, null) {
            });
        }
        // add the category "all"
        if ("all".startsWith(argument)) {
            result.add(new Command(null, false, "all", "", RequiredType.NONE, null) {
            });
        }
        return result;
    }

}