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package com.mojang.brigadier.tree;
import com.google.common.collect.ComparisonChain;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import com.mojang.brigadier.AmbiguityConsumer;
import com.mojang.brigadier.Command;
import com.mojang.brigadier.RedirectModifier;
import com.mojang.brigadier.StringReader;
import com.mojang.brigadier.builder.ArgumentBuilder;
import com.mojang.brigadier.context.CommandContext;
import com.mojang.brigadier.context.CommandContextBuilder;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.suggestion.Suggestions;
import com.mojang.brigadier.suggestion.SuggestionsBuilder;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CompletableFuture;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import net.minecraft.server.CommandListenerWrapper; // CraftBukkit
public abstract class CommandNode<S> implements Comparable<CommandNode<S>> {
private Map<String, CommandNode<S>> children = Maps.newLinkedHashMap();
private Map<String, LiteralCommandNode<S>> literals = Maps.newLinkedHashMap();
private Map<String, ArgumentCommandNode<S, ?>> arguments = Maps.newLinkedHashMap();
private final Predicate<S> requirement;
private final CommandNode<S> redirect;
private final RedirectModifier<S> modifier;
private final boolean forks;
private Command<S> command;
// CraftBukkit start
public void removeCommand(String name) {
children.remove(name);
literals.remove(name);
arguments.remove(name);
}
// CraftBukkit end
protected CommandNode(final Command<S> command, final Predicate<S> requirement, final CommandNode<S> redirect, final RedirectModifier<S> modifier, final boolean forks) {
this.command = command;
this.requirement = requirement;
this.redirect = redirect;
this.modifier = modifier;
this.forks = forks;
}
public Command<S> getCommand() {
return command;
}
public Collection<CommandNode<S>> getChildren() {
return children.values();
}
public CommandNode<S> getChild(final String name) {
return children.get(name);
}
public CommandNode<S> getRedirect() {
return redirect;
}
public RedirectModifier<S> getRedirectModifier() {
return modifier;
}
public boolean canUse(final S source) {
// CraftBukkit start
if (source instanceof CommandListenerWrapper) {
try {
((CommandListenerWrapper) source).currentCommand = this;
return requirement.test(source);
} finally {
((CommandListenerWrapper) source).currentCommand = null;
}
}
// CraftBukkit end
return requirement.test(source);
}
public void addChild(final CommandNode<S> node) {
if (node instanceof RootCommandNode) {
throw new UnsupportedOperationException("Cannot add a RootCommandNode as a child to any other CommandNode");
}
final CommandNode<S> child = children.get(node.getName());
if (child != null) {
// We've found something to merge onto
if (node.getCommand() != null) {
child.command = node.getCommand();
}
for (final CommandNode<S> grandchild : node.getChildren()) {
child.addChild(grandchild);
}
} else {
children.put(node.getName(), node);
if (node instanceof LiteralCommandNode) {
literals.put(node.getName(), (LiteralCommandNode<S>) node);
} else if (node instanceof ArgumentCommandNode) {
arguments.put(node.getName(), (ArgumentCommandNode<S, ?>) node);
}
}
children = children.entrySet().stream().sorted(Map.Entry.comparingByValue()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
}
public void findAmbiguities(final AmbiguityConsumer<S> consumer) {
Set<String> matches = Sets.newHashSet();
for (final CommandNode<S> child : children.values()) {
for (final CommandNode<S> sibling : children.values()) {
if (child == sibling) {
continue;
}
for (final String input : child.getExamples()) {
if (sibling.isValidInput(input)) {
matches.add(input);
}
}
if (matches.size() > 0) {
consumer.ambiguous(this, child, sibling, matches);
matches = Sets.newHashSet();
}
}
child.findAmbiguities(consumer);
}
}
protected abstract boolean isValidInput(final String input);
@Override
public boolean equals(final Object o) {
if (this == o) return true;
if (!(o instanceof CommandNode)) return false;
final CommandNode<S> that = (CommandNode<S>) o;
if (!children.equals(that.children)) return false;
if (command != null ? !command.equals(that.command) : that.command != null) return false;
return true;
}
@Override
public int hashCode() {
return 31 * children.hashCode() + (command != null ? command.hashCode() : 0);
}
public Predicate<S> getRequirement() {
return requirement;
}
public abstract String getName();
public abstract String getUsageText();
public abstract void parse(StringReader reader, CommandContextBuilder<S> contextBuilder) throws CommandSyntaxException;
public abstract CompletableFuture<Suggestions> listSuggestions(CommandContext<S> context, SuggestionsBuilder builder) throws CommandSyntaxException;
public abstract ArgumentBuilder<S, ?> createBuilder();
protected abstract String getSortedKey();
public Collection<? extends CommandNode<S>> getRelevantNodes(final StringReader input) {
if (literals.size() > 0) {
final int cursor = input.getCursor();
while (input.canRead() && input.peek() != ' ') {
input.skip();
}
final String text = input.getString().substring(cursor, input.getCursor());
input.setCursor(cursor);
final LiteralCommandNode<S> literal = literals.get(text);
if (literal != null) {
return Collections.singleton(literal);
} else {
return arguments.values();
}
} else {
return arguments.values();
}
}
@Override
public int compareTo(final CommandNode<S> o) {
return ComparisonChain
.start()
.compareTrueFirst(this instanceof LiteralCommandNode, o instanceof LiteralCommandNode)
.compare(getSortedKey(), o.getSortedKey())
.result();
}
public boolean isFork() {
return forks;
}
public abstract Collection<String> getExamples();
}
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