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/* |
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* This file is part of Araknemu. |
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* |
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* Araknemu is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Araknemu is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with Araknemu. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* Copyright (c) 2017-2021 Vincent Quatrevieux |
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*/ |
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package fr.quatrevieux.araknemu.game.admin.exception.handler; |
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import fr.quatrevieux.araknemu.game.admin.AdminPerformer; |
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import fr.quatrevieux.araknemu.game.admin.Command; |
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import fr.quatrevieux.araknemu.game.admin.CommandParser; |
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import fr.quatrevieux.araknemu.game.admin.exception.CommandNotFoundException; |
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import fr.quatrevieux.araknemu.game.admin.exception.ExceptionHandler; |
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import fr.quatrevieux.araknemu.game.admin.formatter.Link; |
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import org.apache.commons.text.similarity.LevenshteinDistance; |
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import java.util.Comparator; |
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import java.util.Optional; |
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/** |
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* Handler for command not found |
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* This handler will try to found the nearest command name on the current context |
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*/ |
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public final class CommandNotFoundExceptionHandler implements ExceptionHandler.Function<CommandNotFoundException> { |
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@Override |
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public void handle(AdminPerformer performer, CommandNotFoundException error, CommandParser.Arguments arguments) { |
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performer.error("Command '{}' is not found", error.command()); |
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if (arguments == null) { |
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return; |
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} |
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nearestCommandName(arguments).ifPresent(commandName -> performer.error( |
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"Did you mean {} ? (See {})", |
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new Link().text(commandName).command(rebuildCommand(arguments, commandName)), |
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new Link().text("help").execute(arguments.contextPath() + " help " + commandName) |
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)); |
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} |
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/** |
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* Found the nearest command name from the contexts |
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* |
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* @param arguments The parsed arguments |
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* |
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* @return The command name |
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*/ |
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private Optional<String> nearestCommandName(CommandParser.Arguments arguments) { |
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return arguments.context().commands().stream() |
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.map(Command::name) |
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.min(Comparator.comparingInt(name -> LevenshteinDistance.getDefaultInstance().apply(arguments.command(), name))) |
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; |
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} |
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/** |
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* Change the command name from the current command line |
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* |
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* @param arguments The parsed arguments |
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* @param newName The expected command name |
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* |
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* @return The new command line |
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*/ |
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private String rebuildCommand(CommandParser.Arguments arguments, String newName) { |
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final StringBuilder sb = new StringBuilder(); |
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sb.append(arguments.contextPath()); |
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sb.append(' '); |
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sb.append(newName); |
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for (int i = 1; i < arguments.arguments().size(); ++i) { |
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sb.append(' ').append(arguments.arguments().get(i)); |
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} |
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return sb.toString(); |
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} |
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} |
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Arakne /
Araknemu
