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PrintCommandHelp.java
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PrintCommandHelp.java
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/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.command.util;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.extension.platform.Actor;
import com.sk89q.worldedit.util.formatting.component.CommandListBox;
import com.sk89q.worldedit.util.formatting.component.CommandUsageBox;
import com.sk89q.worldedit.util.formatting.component.InvalidComponentException;
import org.enginehub.piston.Command;
import org.enginehub.piston.CommandManager;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static com.sk89q.worldedit.internal.command.CommandUtil.byCleanName;
import static com.sk89q.worldedit.internal.command.CommandUtil.getSubCommands;
import static java.util.stream.Collectors.toList;
/**
* Implementation of the //help command.
*/
// Stored in a separate class to prevent import conflicts, and because it's aliased via /we help.
public class PrintCommandHelp {
private static Command detectCommand(CommandManager manager, String command) {
Optional<Command> mapping;
// First try the command as entered
mapping = manager.getCommand(command);
if (mapping.isPresent()) {
return mapping.get();
}
// If tried with slashes, try dropping a slash
if (command.startsWith("/")) {
mapping = manager.getCommand(command.substring(1));
return mapping.orElse(null);
}
// Otherwise, check /command, since that's common
mapping = manager.getCommand("/" + command);
return mapping.orElse(null);
}
public static void help(List<String> commandPath, int page, boolean listSubCommands,
CommandManager manager, Actor actor, String helpRootCommand) throws InvalidComponentException {
if (commandPath.isEmpty()) {
printCommands(page, manager.getAllCommands(), actor, ImmutableList.of(), helpRootCommand);
return;
}
List<Command> visited = new ArrayList<>();
Command currentCommand = detectCommand(manager, commandPath.get(0));
if (currentCommand == null) {
actor.printError(String.format("The command '%s' could not be found.", commandPath.get(0)));
return;
}
visited.add(currentCommand);
// Drill down to the command
for (int i = 1; i < commandPath.size(); i++) {
String subCommand = commandPath.get(i);
Map<String, Command> subCommands = getSubCommands(currentCommand);
if (subCommands.isEmpty()) {
actor.printError(String.format("'%s' has no sub-commands. (Maybe '%s' is for a parameter?)",
toCommandString(visited), subCommand));
// full help for single command
CommandUsageBox box = new CommandUsageBox(visited, visited.stream()
.map(Command::getName).collect(Collectors.joining(" ")), helpRootCommand);
actor.print(box.create());
return;
}
if (subCommands.containsKey(subCommand)) {
currentCommand = subCommands.get(subCommand);
visited.add(currentCommand);
} else {
actor.printError(String.format("The sub-command '%s' under '%s' could not be found.",
subCommand, toCommandString(visited)));
// list subcommands for currentCommand
printCommands(page, getSubCommands(Iterables.getLast(visited)).values().stream(), actor, visited, helpRootCommand);
return;
}
}
Map<String, Command> subCommands = getSubCommands(currentCommand);
if (subCommands.isEmpty() || !listSubCommands) {
// Create the message
CommandUsageBox box = new CommandUsageBox(visited, toCommandString(visited), helpRootCommand);
actor.print(box.create());
} else {
printCommands(page, subCommands.values().stream(), actor, visited, helpRootCommand);
}
}
private static String toCommandString(List<Command> visited) {
return "/" + Joiner.on(" ").join(visited.stream().map(Command::getName).iterator());
}
private static void printCommands(int page, Stream<Command> commandStream, Actor actor,
List<Command> commandList, String helpRootCommand) throws InvalidComponentException {
// Get a list of aliases
List<Command> commands = commandStream
.sorted(byCleanName())
.collect(toList());
String used = commandList.isEmpty() ? null : toCommandString(commandList);
CommandListBox box = new CommandListBox(
(used == null ? "Help" : "Subcommands: " + used),
helpRootCommand + " -s -p %page%" + (used == null ? "" : " " + used),
helpRootCommand);
if (!actor.isPlayer()) {
box.formatForConsole();
}
for (Command mapping : commands) {
String alias = (commandList.isEmpty() ? "/" : "") + mapping.getName();
String command = Stream.concat(commandList.stream(), Stream.of(mapping))
.map(Command::getName)
.collect(Collectors.joining(" ", "/", ""));
box.appendCommand(alias, mapping.getDescription(), command);
}
actor.print(box.create(page));
}
private PrintCommandHelp() {
}
}