✨ Add a system for creating task chains

This will make it easier to use the asynchronous coordinator.

cloud-minecraft/cloud-bukkit/build.gradle

@@ -1,6 +1,7 @@
 dependencies {
     api project(':cloud-core')
     api project(':cloud-brigadier')
+    api project(':cloud-tasks')
     compileOnly 'org.bukkit:bukkit:1.13.2-R0.1-SNAPSHOT'
     compileOnly 'me.lucko:commodore:1.9'
 }

cloud-minecraft/cloud-bukkit/src/main/java/cloud/commandframework/bukkit/BukkitCommandManager.java

@@ -38,6 +38,8 @@ import cloud.commandframework.bukkit.parsers.selector.MultiplePlayerSelectorArgu
 import cloud.commandframework.bukkit.parsers.selector.SingleEntitySelectorArgument;
 import cloud.commandframework.bukkit.parsers.selector.SinglePlayerSelectorArgument;
 import cloud.commandframework.execution.CommandExecutionCoordinator;
+import cloud.commandframework.tasks.TaskFactory;
+import cloud.commandframework.tasks.TaskRecipe;
 import io.leangen.geantyref.TypeToken;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
@@ -73,6 +75,9 @@ public class BukkitCommandManager<C> extends CommandManager<C> {
     private final Function<CommandSender, C> commandSenderMapper;
     private final Function<C, CommandSender> backwardsCommandSenderMapper;
 
+    private final BukkitSynchronizer bukkitSynchronizer;
+    private final TaskFactory taskFactory;
+
     private boolean splitAliases = false;
 
     /**
@@ -96,6 +101,9 @@ public class BukkitCommandManager<C> extends CommandManager<C> {
         this.commandSenderMapper = commandSenderMapper;
         this.backwardsCommandSenderMapper = backwardsCommandSenderMapper;
 
+        this.bukkitSynchronizer = new BukkitSynchronizer(owningPlugin);
+        this.taskFactory = new TaskFactory(this.bukkitSynchronizer);
+
         /* Try to determine the Minecraft version */
         int version = -1;
         try {
@@ -142,6 +150,15 @@ public class BukkitCommandManager<C> extends CommandManager<C> {
                 new MultiplePlayerSelectorArgument.MultiplePlayerSelectorParser<>());
     }
 
+    /**
+     * Create a new task recipe. This can be used to create chains of synchronous/asynchronous method calls
+     *
+     * @return Task recipe
+     */
+    public @NonNull TaskRecipe taskRecipe() {
+        return this.taskFactory.recipe();
+    }
+
     /**
      * Get the plugin that owns the manager
      *

cloud-minecraft/cloud-bukkit/src/main/java/cloud/commandframework/bukkit/BukkitSynchronizer.java

@@ -0,0 +1,76 @@
+//
+// MIT License
+//
+// Copyright (c) 2020 Alexander Söderberg & Contributors
+//
+// 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 cloud.commandframework.bukkit;
+
+import cloud.commandframework.tasks.TaskConsumer;
+import cloud.commandframework.tasks.TaskFunction;
+import cloud.commandframework.tasks.TaskSynchronizer;
+import org.bukkit.plugin.Plugin;
+import org.checkerframework.checker.nullness.qual.NonNull;
+
+import java.util.concurrent.CompletableFuture;
+
+final class BukkitSynchronizer implements TaskSynchronizer {
+
+    private final Plugin plugin;
+
+    BukkitSynchronizer(final @NonNull Plugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public <I> CompletableFuture<Void> runSynchronous(final @NonNull I input, final @NonNull TaskConsumer<I> consumer) {
+       final CompletableFuture<Void> future = new CompletableFuture<>();
+       this.plugin.getServer().getScheduler().runTask(this.plugin, () -> {
+           consumer.accept(input);
+           future.complete(null);
+       });
+       return future;
+    }
+
+    @Override
+    public <I, O> CompletableFuture<O> runSynchronous(final @NonNull I input, final @NonNull TaskFunction<I, O> function) {
+        final CompletableFuture<O> future = new CompletableFuture<>();
+        this.plugin.getServer().getScheduler().runTask(this.plugin, () -> future.complete(function.apply(input)));
+        return future;
+    }
+
+    @Override
+    public <I> CompletableFuture<Void> runAsynchronous(final @NonNull I input, final @NonNull TaskConsumer<I> consumer) {
+        final CompletableFuture<Void> future = new CompletableFuture<>();
+        this.plugin.getServer().getScheduler().runTaskAsynchronously(this.plugin, () -> {
+            consumer.accept(input);
+            future.complete(null);
+        });
+        return future;
+    }
+
+    @Override
+    public <I, O> CompletableFuture<O> runAsynchronous(final @NonNull I input, final @NonNull TaskFunction<I, O> function) {
+        final CompletableFuture<O> future = new CompletableFuture<>();
+        this.plugin.getServer().getScheduler().runTaskAsynchronously(this.plugin, () -> future.complete(function.apply(input)));
+        return future;
+    }
+
+}