DMDirc-Plugins/debug/src/main/java/com/dmdirc/addons/debug/commands/Time.java

/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * 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.dmdirc.addons.debug.commands;

import com.dmdirc.addons.debug.Debug;
import com.dmdirc.addons.debug.DebugCommand;
import com.dmdirc.commandparser.CommandArguments;
import com.dmdirc.commandparser.commands.IntelligentCommand;
import com.dmdirc.commandparser.commands.context.CommandContext;
import com.dmdirc.commandparser.parsers.CommandParser;
import com.dmdirc.interfaces.InputModel;
import com.dmdirc.interfaces.WindowModel;
import com.dmdirc.ui.input.AdditionalTabTargets;
import com.dmdirc.ui.input.TabCompletionType;

import java.util.Optional;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import javax.inject.Provider;

/**
 * Times how long it takes to execute commands.
 */
public class Time extends DebugCommand implements IntelligentCommand {

    /**
     * Creates a new instance of the command.
     *
     * @param commandProvider The provider to use to access the main debug command.
     */
    @Inject
    public Time(final Provider<Debug> commandProvider) {
        super(commandProvider);
    }

    @Override
    public String getName() {
        return "time";
    }

    @Override
    public String getUsage() {
        return "<command to time> - times the specified command";
    }

    @Override
    public void execute(@Nonnull final WindowModel origin,
            final CommandArguments args, final CommandContext context) {
        doTime(origin, args);
    }

    /**
     * Facilitates timing of a command.
     *
     * @param origin The origin of the command
     * @param args   The arguments that were passed to the command
     */
    private void doTime(final WindowModel origin,
            final CommandArguments args) {
        if (args.getArguments().length == 0) {
            showUsage(origin, args.isSilent(), getName(), getUsage());
            return;
        }

        final Optional<CommandParser> parser =
                origin.getInputModel().map(InputModel::getCommandParser);
        if (parser.isPresent()) {
            final long start = System.currentTimeMillis();
            parser.get().parseCommand(origin, args.getArgumentsAsString(0));
            final long end = System.currentTimeMillis();
            showOutput(origin, args.isSilent(),
                    "Command executed in " + (end - start) + " milliseconds.");
        }
    }

    @Override
    public AdditionalTabTargets getSuggestions(final int arg,
            final IntelligentCommandContext context) {
        final AdditionalTabTargets res = new AdditionalTabTargets();
        res.excludeAll();

        if (arg == 1) {
            res.include(TabCompletionType.COMMAND);
        }

        return res;
    }

}