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1.20.4 Lightweight Minecraft server
package net.minestom.server.command.builder.arguments.minecraft;
import net.minestom.server.command.CommandSender;
import net.minestom.server.command.builder.arguments.Argument;
import net.minestom.server.command.builder.exception.ArgumentSyntaxException;
import net.minestom.server.entity.EntityType;
import net.minestom.server.entity.GameMode;
import net.minestom.server.utils.StringUtils;
import net.minestom.server.utils.binary.BinaryWriter;
import net.minestom.server.utils.entity.EntityFinder;
import net.minestom.server.utils.math.IntRange;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Arrays;
import java.util.List;
import java.util.UUID;
import java.util.regex.Pattern;
/**
* Represents the target selector argument.
* https://minecraft.wiki/w/Target_selectors
*/
public class ArgumentEntity extends Argument {
public static final int INVALID_SYNTAX = -2;
public static final int ONLY_SINGLE_ENTITY_ERROR = -3;
public static final int ONLY_PLAYERS_ERROR = -4;
public static final int INVALID_ARGUMENT_NAME = -5;
public static final int INVALID_ARGUMENT_VALUE = -6;
private static final Pattern USERNAME_PATTERN = Pattern.compile("[a-zA-Z0-9_]{1,16}");
private static final String SELECTOR_PREFIX = "@";
private static final List SELECTOR_VARIABLES = Arrays.asList("@p", "@r", "@a", "@e", "@s");
private static final List PLAYERS_ONLY_SELECTOR = Arrays.asList("@p", "@r", "@a", "@s");
private static final List SINGLE_ONLY_SELECTOR = Arrays.asList("@p", "@r", "@s");
// List with all the valid arguments
private static final List VALID_ARGUMENTS = Arrays.asList(
"x", "y", "z",
"distance", "dx", "dy", "dz",
"scores", "tag", "team", "limit", "sort", "level", "gamemode", "name",
"x_rotation", "y_rotation", "type", "nbt", "advancements", "predicate");
// List with all the easily parsable arguments which only require reading until a specific character (comma)
private static final List SIMPLE_ARGUMENTS = Arrays.asList(
"x", "y", "z",
"distance", "dx", "dy", "dz",
"scores", "tag", "team", "limit", "sort", "level", "gamemode",
"x_rotation", "y_rotation", "type", "advancements", "predicate");
private boolean onlySingleEntity;
private boolean onlyPlayers;
public ArgumentEntity(String id) {
super(id, true);
}
public ArgumentEntity singleEntity(boolean singleEntity) {
this.onlySingleEntity = singleEntity;
return this;
}
public ArgumentEntity onlyPlayers(boolean onlyPlayers) {
this.onlyPlayers = onlyPlayers;
return this;
}
@NotNull
@Override
public EntityFinder parse(@NotNull CommandSender sender, @NotNull String input) throws ArgumentSyntaxException {
return staticParse(sender, input, onlySingleEntity, onlyPlayers);
}
@Override
public String parser() {
return "minecraft:entity";
}
@Override
public byte @Nullable [] nodeProperties() {
return BinaryWriter.makeArray(packetWriter -> {
byte mask = 0;
if (this.isOnlySingleEntity()) {
mask |= 0x01;
}
if (this.isOnlyPlayers()) {
mask |= 0x02;
}
packetWriter.writeByte(mask);
});
}
/**
* @deprecated use {@link Argument#parse(CommandSender, Argument)}
*/
@Deprecated
@NotNull
public static EntityFinder staticParse(@NotNull CommandSender sender, @NotNull String input,
boolean onlySingleEntity, boolean onlyPlayers) throws ArgumentSyntaxException {
// Check for raw player name or UUID
if (!input.contains(SELECTOR_PREFIX) && !input.contains(StringUtils.SPACE)) {
// Check if the input is a valid UUID
try {
final UUID uuid = UUID.fromString(input);
return new EntityFinder()
.setTargetSelector(EntityFinder.TargetSelector.MINESTOM_UUID)
.setConstantUuid(uuid);
} catch (IllegalArgumentException ignored) {
}
// Check if the input is a valid player name
if (USERNAME_PATTERN.matcher(input).matches()) {
return new EntityFinder()
.setTargetSelector(EntityFinder.TargetSelector.MINESTOM_USERNAME)
.setConstantName(input);
}
}
// The minimum size is always 2 (for the selector variable, ex: @p)
if (input.length() < 2)
throw new ArgumentSyntaxException("Length needs to be > 1", input, INVALID_SYNTAX);
// The target selector variable always start by '@'
if (!input.startsWith(SELECTOR_PREFIX))
throw new ArgumentSyntaxException("Target selector needs to start with @", input, INVALID_SYNTAX);
final String selectorVariable = input.substring(0, 2);
// Check if the selector variable used exists
if (!SELECTOR_VARIABLES.contains(selectorVariable))
throw new ArgumentSyntaxException("Invalid selector variable", input, INVALID_SYNTAX);
// Check if it should only select single entity and if the selector variable valid the condition
if (onlySingleEntity && !SINGLE_ONLY_SELECTOR.contains(selectorVariable))
throw new ArgumentSyntaxException("Argument requires only a single entity", input, ONLY_SINGLE_ENTITY_ERROR);
// Check if it should only select players and if the selector variable valid the condition
if (onlyPlayers && !PLAYERS_ONLY_SELECTOR.contains(selectorVariable))
throw new ArgumentSyntaxException("Argument requires only players", input, ONLY_PLAYERS_ERROR);
// Create the EntityFinder which will be used for the rest of the parsing
final EntityFinder entityFinder = new EntityFinder()
.setTargetSelector(toTargetSelector(selectorVariable));
// The selector is a single selector variable which verify all the conditions
if (input.length() == 2)
return entityFinder;
// START PARSING THE STRUCTURE
final String structure = input.substring(2);
return parseStructure(sender, input, entityFinder, structure);
}
@NotNull
private static EntityFinder parseStructure(@NotNull CommandSender sender,
@NotNull String input,
@NotNull EntityFinder entityFinder,
@NotNull String structure) throws ArgumentSyntaxException {
// The structure isn't opened or closed properly
if (!structure.startsWith("[") || !structure.endsWith("]"))
throw new ArgumentSyntaxException("Target selector needs to start and end with brackets", input, INVALID_SYNTAX);
// Remove brackets
final String structureData = structure.substring(1, structure.length() - 1);
//System.out.println("structure data: " + structureData);
String currentArgument = "";
for (int i = 0; i < structureData.length(); i++) {
final char c = structureData.charAt(i);
if (c == '=') {
// Replace all unnecessary spaces
currentArgument = currentArgument.trim();
if (!VALID_ARGUMENTS.contains(currentArgument))
throw new ArgumentSyntaxException("Argument name '" + currentArgument + "' does not exist", input, INVALID_ARGUMENT_NAME);
i = parseArgument(sender, entityFinder, currentArgument, input, structureData, i);
currentArgument = ""; // Reset current argument
} else {
currentArgument += c;
}
}
return entityFinder;
}
private static int parseArgument(@NotNull CommandSender sender,
@NotNull EntityFinder entityFinder,
@NotNull String argumentName,
@NotNull String input,
@NotNull String structureData, int beginIndex) throws ArgumentSyntaxException {
final char comma = ',';
final boolean isSimple = SIMPLE_ARGUMENTS.contains(argumentName);
int finalIndex = beginIndex + 1;
StringBuilder valueBuilder = new StringBuilder();
for (; finalIndex < structureData.length(); finalIndex++) {
final char c = structureData.charAt(finalIndex);
// Command is parsed
if (isSimple && c == comma)
break;
valueBuilder.append(c);
}
final String value = valueBuilder.toString().trim();
//System.out.println("value: " + value);
switch (argumentName) {
case "type": {
final boolean include = !value.startsWith("!");
final String entityName = include ? value : value.substring(1);
final EntityType entityType = EntityType.fromNamespaceId(entityName);
if (entityType == null)
throw new ArgumentSyntaxException("Invalid entity name", input, INVALID_ARGUMENT_VALUE);
entityFinder.setEntity(entityType, include ? EntityFinder.ToggleableType.INCLUDE : EntityFinder.ToggleableType.EXCLUDE);
break;
}
case "gamemode": {
final boolean include = !value.startsWith("!");
final String gameModeName = include ? value : value.substring(1);
try {
final GameMode gameMode = GameMode.valueOf(gameModeName.toUpperCase());
entityFinder.setGameMode(gameMode, include ? EntityFinder.ToggleableType.INCLUDE : EntityFinder.ToggleableType.EXCLUDE);
} catch (IllegalArgumentException e) {
throw new ArgumentSyntaxException("Invalid entity game mode", input, INVALID_ARGUMENT_VALUE);
}
break;
}
case "limit":
int limit;
try {
limit = Integer.parseInt(value);
entityFinder.setLimit(limit);
} catch (NumberFormatException e) {
throw new ArgumentSyntaxException("Invalid limit number", input, INVALID_ARGUMENT_VALUE);
}
if (limit <= 0) {
throw new ArgumentSyntaxException("Limit must be positive", input, INVALID_ARGUMENT_VALUE);
}
break;
case "sort":
try {
EntityFinder.EntitySort entitySort = EntityFinder.EntitySort.valueOf(value.toUpperCase());
entityFinder.setEntitySort(entitySort);
} catch (IllegalArgumentException e) {
throw new ArgumentSyntaxException("Invalid entity sort", input, INVALID_ARGUMENT_VALUE);
}
break;
case "level":
try {
final IntRange level = Argument.parse(sender, new ArgumentIntRange(value));
entityFinder.setLevel(level);
} catch (ArgumentSyntaxException e) {
throw new ArgumentSyntaxException("Invalid level number", input, INVALID_ARGUMENT_VALUE);
}
break;
case "distance":
try {
final IntRange distance = Argument.parse(sender, new ArgumentIntRange(value));
entityFinder.setDistance(distance);
} catch (ArgumentSyntaxException e) {
throw new ArgumentSyntaxException("Invalid level number", input, INVALID_ARGUMENT_VALUE);
}
break;
}
return finalIndex;
}
public boolean isOnlySingleEntity() {
return onlySingleEntity;
}
public boolean isOnlyPlayers() {
return onlyPlayers;
}
@Override
public String toString() {
if (onlySingleEntity) {
if (onlyPlayers) {
return String.format("Player<%s>", getId());
}
return String.format("Entity<%s>", getId());
}
if (onlyPlayers) {
return String.format("Players<%s>", getId());
}
return String.format("Entities<%s>", getId());
}
private static EntityFinder.TargetSelector toTargetSelector(@NotNull String selectorVariable) {
if (selectorVariable.equals("@p"))
return EntityFinder.TargetSelector.NEAREST_PLAYER;
if (selectorVariable.equals("@r"))
return EntityFinder.TargetSelector.RANDOM_PLAYER;
if (selectorVariable.equals("@a"))
return EntityFinder.TargetSelector.ALL_PLAYERS;
if (selectorVariable.equals("@e"))
return EntityFinder.TargetSelector.ALL_ENTITIES;
if (selectorVariable.equals("@s"))
return EntityFinder.TargetSelector.SELF;
throw new IllegalStateException("Weird selector variable: " + selectorVariable);
}
}