net.kyori.text.serializer.gson.BlockNbtComponentPosSerializer.java Source code

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Here is the source code for net.kyori.text.serializer.gson.BlockNbtComponentPosSerializer.java

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/*
 * This file is part of text, licensed under the MIT License.
 *
 * Copyright (c) 2017-2019 KyoriPowered
 *
 * 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 net.kyori.text.serializer.gson;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import net.kyori.text.BlockNbtComponent;

import java.lang.reflect.Type;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class BlockNbtComponentPosSerializer
        implements JsonDeserializer<BlockNbtComponent.Pos>, JsonSerializer<BlockNbtComponent.Pos> {
    public static final BlockNbtComponentPosSerializer INSTANCE = new BlockNbtComponentPosSerializer();
    private static final Pattern LOCAL_PATTERN = Pattern
            .compile("^\\^(\\d+(\\.\\d+)?) \\^(\\d+(\\.\\d+)?) \\^(\\d+(\\.\\d+)?)$");
    private static final Pattern WORLD_PATTERN = Pattern.compile("^(~?)(\\d+) (~?)(\\d+) (~?)(\\d+)$");

    @Override
    public BlockNbtComponent.Pos deserialize(final JsonElement json, final Type typeOfT,
            final JsonDeserializationContext context) throws JsonParseException {
        final String string = json.getAsString();

        final Matcher localMatch = LOCAL_PATTERN.matcher(string);
        if (localMatch.matches()) {
            return BlockNbtComponent.LocalPos.of(Double.parseDouble(localMatch.group(1)),
                    Double.parseDouble(localMatch.group(3)), Double.parseDouble(localMatch.group(5)));
        }

        final Matcher worldMatch = WORLD_PATTERN.matcher(string);
        if (worldMatch.matches()) {
            return BlockNbtComponent.WorldPos.of(deserializeCoordinate(worldMatch.group(1), worldMatch.group(2)),
                    deserializeCoordinate(worldMatch.group(3), worldMatch.group(4)),
                    deserializeCoordinate(worldMatch.group(5), worldMatch.group(6)));
        }

        throw new JsonParseException("Don't know how to turn " + string + " into a Position");
    }

    @Override
    public JsonElement serialize(final BlockNbtComponent.Pos src, final Type typeOfSrc,
            final JsonSerializationContext context) {
        if (src instanceof BlockNbtComponent.LocalPos) {
            final BlockNbtComponent.LocalPos local = (BlockNbtComponent.LocalPos) src;
            return new JsonPrimitive("^" + local.left() + ' ' + '^' + local.up() + ' ' + '^' + local.forwards());
        } else if (src instanceof BlockNbtComponent.WorldPos) {
            final BlockNbtComponent.WorldPos world = (BlockNbtComponent.WorldPos) src;
            return new JsonPrimitive(serializeCoordinate(world.x()) + ' ' + serializeCoordinate(world.y()) + ' '
                    + serializeCoordinate(world.z()));
        } else {
            throw new IllegalArgumentException("Don't know how to serialize " + src + " as a Position");
        }
    }

    private static BlockNbtComponent.WorldPos.Coordinate deserializeCoordinate(final String prefix,
            final String value) {
        final int i = Integer.parseInt(value);
        if (prefix.isEmpty()) {
            return BlockNbtComponent.WorldPos.Coordinate.absolute(i);
        } else if (prefix.equals("~")) {
            return BlockNbtComponent.WorldPos.Coordinate.relative(i);
        } else {
            throw new AssertionError(); // regex does not allow any other value for prefix.
        }
    }

    private static String serializeCoordinate(final BlockNbtComponent.WorldPos.Coordinate coordinate) {
        return (coordinate.type() == BlockNbtComponent.WorldPos.Coordinate.Type.RELATIVE ? "~" : "")
                + coordinate.value();
    }
}