io.github.lxgaming.teleportbow.managers.CommandManager.java Source code

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Here is the source code for io.github.lxgaming.teleportbow.managers.CommandManager.java

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/*
 * Copyright 2018 Alex Thomson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.lxgaming.teleportbow.managers;

import io.github.lxgaming.teleportbow.TeleportBow;
import io.github.lxgaming.teleportbow.commands.AbstractCommand;
import io.github.lxgaming.teleportbow.util.Toolbox;
import org.apache.commons.lang3.StringUtils;
import org.spongepowered.api.Sponge;
import org.spongepowered.api.command.CommandResult;
import org.spongepowered.api.command.CommandSource;
import org.spongepowered.api.text.Text;
import org.spongepowered.api.text.format.TextColors;

import java.util.List;
import java.util.Optional;
import java.util.Set;

public final class CommandManager {

    private static final Set<AbstractCommand> COMMANDS = Toolbox.newLinkedHashSet();
    private static final Set<Class<? extends AbstractCommand>> COMMAND_CLASSES = Toolbox.newLinkedHashSet();

    public static CommandResult process(AbstractCommand abstractCommand, CommandSource commandSource,
            String message) {
        Optional<List<String>> arguments = getArguments(message).map(Toolbox::newArrayList);
        if (!arguments.isPresent()) {
            commandSource
                    .sendMessage(Text.of(Toolbox.getTextPrefix(), TextColors.RED, "Failed to collect arguments"));
            return CommandResult.empty();
        }

        Optional<AbstractCommand> command = getCommand(abstractCommand, arguments.get());
        if (!command.isPresent()) {
            return CommandResult.empty();
        }

        if (!command.get().testPermission(commandSource)) {
            commandSource.sendMessage(Text.of(Toolbox.getTextPrefix(), TextColors.RED,
                    "You do not have permission to execute this command"));
            return CommandResult.empty();
        }

        TeleportBow.getInstance().getLogger().debug("Processing {} for {}",
                command.get().getPrimaryAlias().orElse("Unknown"), commandSource.getName());
        return command.get().execute(commandSource, arguments.get());
    }

    public static boolean registerCommand(Class<? extends AbstractCommand> commandClass) {
        if (getCommandClasses().contains(commandClass)) {
            TeleportBow.getInstance().getLogger().warn("{} has already been registered",
                    commandClass.getSimpleName());
            return false;
        }

        getCommandClasses().add(commandClass);
        Optional<AbstractCommand> command = Toolbox.newInstance(commandClass);
        if (!command.isPresent()) {
            TeleportBow.getInstance().getLogger().error("{} failed to initialize", commandClass.getSimpleName());
            return false;
        }

        getCommands().add(command.get());
        Sponge.getCommandManager().register(TeleportBow.getInstance().getPluginContainer(), command.get(),
                command.get().getAliases().toArray(new String[0]));
        TeleportBow.getInstance().getLogger().debug("{} registered", commandClass.getSimpleName());
        return true;
    }

    public static boolean registerAlias(AbstractCommand command, String alias) {
        if (Toolbox.containsIgnoreCase(command.getAliases(), alias)) {
            TeleportBow.getInstance().getLogger().warn("{} has already been registered for {}", alias,
                    command.getClass().getSimpleName());
            return false;
        }

        command.getAliases().add(alias);
        TeleportBow.getInstance().getLogger().debug("{} registered for {}", alias,
                command.getClass().getSimpleName());
        return true;
    }

    public static boolean registerCommand(AbstractCommand parentCommand,
            Class<? extends AbstractCommand> commandClass) {
        if (parentCommand.getClass() == commandClass) {
            TeleportBow.getInstance().getLogger().warn("{} attempted to register itself",
                    parentCommand.getClass().getSimpleName());
            return false;
        }

        if (getCommandClasses().contains(commandClass)) {
            TeleportBow.getInstance().getLogger().warn("{} has already been registered",
                    commandClass.getSimpleName());
            return false;
        }

        getCommandClasses().add(commandClass);
        Optional<AbstractCommand> command = Toolbox.newInstance(commandClass);
        if (!command.isPresent()) {
            TeleportBow.getInstance().getLogger().error("{} failed to initialize", commandClass.getSimpleName());
            return false;
        }

        parentCommand.getChildren().add(command.get());
        TeleportBow.getInstance().getLogger().debug("{} registered for {}", commandClass.getSimpleName(),
                parentCommand.getClass().getSimpleName());
        return true;
    }

    public static Optional<AbstractCommand> getCommand(List<String> arguments) {
        return getCommand(null, arguments);
    }

    private static Optional<AbstractCommand> getCommand(AbstractCommand parentCommand, List<String> arguments) {
        Set<AbstractCommand> commands = Toolbox.newLinkedHashSet();
        if (parentCommand != null) {
            commands.addAll(parentCommand.getChildren());
        } else {
            commands.addAll(getCommands());
        }

        if (arguments.isEmpty() || commands.isEmpty()) {
            return Optional.ofNullable(parentCommand);
        }

        for (AbstractCommand command : commands) {
            if (Toolbox.containsIgnoreCase(command.getAliases(), arguments.get(0))) {
                arguments.remove(0);
                return getCommand(command, arguments);
            }
        }

        return Optional.ofNullable(parentCommand);
    }

    private static Optional<String[]> getArguments(String message) {
        return Optional.ofNullable(StringUtils.split(Toolbox.filter(message), " "));
    }

    public static Set<AbstractCommand> getCommands() {
        return COMMANDS;
    }

    private static Set<Class<? extends AbstractCommand>> getCommandClasses() {
        return COMMAND_CLASSES;
    }
}