Added WorldConverter.java

worldedit-core/src/main/java/com/sk89q/worldedit/command/argument/WorldConverter.java

@@ -0,0 +1,81 @@
+/*
+ * 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.argument;
+
+import com.sk89q.worldedit.WorldEdit;
+import com.sk89q.worldedit.extension.platform.Capability;
+import com.sk89q.worldedit.util.formatting.text.Component;
+import com.sk89q.worldedit.util.formatting.text.TextComponent;
+import com.sk89q.worldedit.world.World;
+import org.enginehub.piston.CommandManager;
+import org.enginehub.piston.converter.ArgumentConverter;
+import org.enginehub.piston.converter.ConversionResult;
+import org.enginehub.piston.converter.FailedConversion;
+import org.enginehub.piston.converter.SuccessfulConversion;
+import org.enginehub.piston.inject.InjectedValueAccess;
+import org.enginehub.piston.inject.Key;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class WorldConverter implements ArgumentConverter<World> {
+
+    public static void register(CommandManager commandManager) {
+        commandManager.registerConverter(Key.of(World.class),
+                new WorldConverter()
+        );
+    }
+
+    private final TextComponent choices;
+
+    private WorldConverter() {
+        this.choices = TextComponent.of("any world");
+    }
+
+    @Override
+    public Component describeAcceptableArguments() {
+        return this.choices;
+    }
+
+    private Stream<? extends World> getWorlds() {
+        return WorldEdit.getInstance().getPlatformManager()
+                .queryCapability(Capability.GAME_HOOKS).getWorlds().stream();
+    }
+
+    @Override
+    public List<String> getSuggestions(String input) {
+        return getWorlds()
+                .map(World::getId)
+                .filter(world -> world.startsWith(input))
+                .collect(Collectors.toList());
+    }
+
+    @Override
+    public ConversionResult<World> convert(String s, InjectedValueAccess injectedValueAccess) {
+        World result = getWorlds()
+                .filter(world -> world.getId().equals(s))
+                .findAny().orElse(null);
+        return result == null
+                ? FailedConversion.from(new IllegalArgumentException(
+                "Not a valid world: " + s))
+                : SuccessfulConversion.fromSingle(result);
+    }
+}