com.helion3.prism.commands.UndoCommand.java Source code

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Here is the source code for com.helion3.prism.commands.UndoCommand.java

Source

/*
 * This file is part of Prism, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2015 Helion3 http://helion3.com/
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.helion3.prism.commands;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.google.common.collect.Lists;
import org.spongepowered.api.command.CommandException;
import org.spongepowered.api.world.BlockChangeFlag;
import org.spongepowered.api.block.BlockSnapshot;
import org.spongepowered.api.command.CommandResult;
import org.spongepowered.api.command.spec.CommandSpec;
import org.spongepowered.api.entity.Entity;
import org.spongepowered.api.entity.living.player.Player;
import org.spongepowered.api.text.Text;

import com.helion3.prism.Prism;
import com.helion3.prism.api.records.ActionableResult;
import com.helion3.prism.util.Format;
import com.helion3.prism.util.Template;
import com.helion3.prism.util.Translation;

public class UndoCommand {
    private UndoCommand() {
    }

    public static CommandSpec getCommand() {
        return CommandSpec.builder().permission("prism.undo").executor((source, args) -> {
            if (!(source instanceof Player)) {
                throw new CommandException(Format.error("You must be a player to use this command."));
            }

            List<ActionableResult> results = Prism.getLastActionResults().get(((Player) source).getUniqueId());
            if (results == null || results.isEmpty()) {
                throw new CommandException(Format.error("You have no valid actions to undo."));
            }
            // Reverse the order of the list to undo last action.
            results = Lists.reverse(results);

            int applied = 0;
            int skipped = 0;

            for (ActionableResult result : results) {
                if (result.getTransaction().isPresent()) {
                    Object rawOriginal = result.getTransaction().get().getOriginal();
                    Object rawFinal = result.getTransaction().get().getFinal();

                    if (rawOriginal instanceof BlockSnapshot) {
                        if (((BlockSnapshot) rawOriginal).restore(true, BlockChangeFlag.NONE)) {
                            applied++;
                        } else {
                            skipped++;
                        }
                    }

                    if (rawFinal instanceof Entity) {
                        Entity entity = (Entity) rawFinal;
                        if (!entity.isRemoved()) {
                            entity.remove();
                            applied++;
                        } else {
                            skipped++;
                        }
                    }
                } else {
                    skipped++;
                }
            }

            Map<String, String> tokens = new HashMap<>();
            tokens.put("appliedCount", "" + applied);
            tokens.put("skippedCount", "" + skipped);

            final String messageTemplate;
            if (skipped > 0) {
                messageTemplate = Translation.from("rollback.success.withskipped");
            } else {
                messageTemplate = Translation.from("rollback.success");
            }

            source.sendMessage(Format.heading(Text.of(Template.parseTemplate(messageTemplate, tokens)), " ",
                    Format.bonus(Translation.from("rollback.success.bonus"))));

            return CommandResult.success();
        }).build();
    }
}