resolve merge conflicts

# Conflicts:
#	common/src/main/java/com/dfsek/terra/api/TerraPlugin.java
#	common/src/test/java/biome/DistributionTest.java
#	platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/TerraBukkitPlugin.java
#	platforms/fabric/src/main/java/com/dfsek/terra/fabric/TerraFabricPlugin.java
#	platforms/region/src/main/java/com/dfsek/terra/StandalonePlugin.java
#	platforms/sponge/src/main/java/com/dfsek/terra/sponge/TerraSpongePlugin.java

common/src/main/java/com/dfsek/terra/api/TerraPlugin.java

@@ -7,6 +7,7 @@ import com.dfsek.terra.api.platform.handle.WorldHandle;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.util.JarUtil;
 import com.dfsek.terra.api.util.logging.DebugLogger;
 import com.dfsek.terra.api.util.logging.Logger;
@@ -75,4 +76,6 @@ public interface TerraPlugin extends LoaderRegistrar {
     default JarFile getModJar() throws URISyntaxException, IOException {
         return JarUtil.getJarFile();
     }
+
+    TaskScheduler getScheduler();
 }

common/src/main/java/com/dfsek/terra/api/task/TaskScheduler.java

@@ -0,0 +1,35 @@
+package com.dfsek.terra.api.task;
+
+public interface TaskScheduler {
+    /**
+     * Run a task synchronously on the next tick.
+     * Functionally equivalent to {@link #runTask(Runnable, long)}
+     * @param task Task to run.
+     */
+    default void runTask(Runnable task) {
+        runTask(task, 0);
+    }
+
+    /**
+     * Schedule a task asynchronously immediately.
+     * Functionally equivalent to {@link #runTaskAsynchronously(Runnable)} (Runnable, long)}
+     * @param task Task to run.
+     */
+    default void runTaskAsynchronously(Runnable task) {
+        runTaskAsynchronously(task, 0);
+    }
+
+    /**
+     * Run a task asynchronously after a number of ticks.
+     * @param task Task to run.
+     * @param ticks Delay before running the task, in ticks.
+     */
+    void runTaskAsynchronously(Runnable task, long ticks);
+
+    /**
+     * Run a task synchronously after a number of ticks.
+     * @param task Task to run.
+     * @param ticks Delay before running the task, in ticks.
+     */
+    void runTask(Runnable task, long ticks);
+}

common/src/main/java/com/dfsek/terra/api/util/generic/either/Either.java

@@ -49,4 +49,21 @@ public final class Either<L, R> {
     public boolean hasRight() {
         return !leftPresent;
     }
+
+    @Override
+    public int hashCode() {
+        if(hasLeft()) return left.hashCode();
+        return right.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if(!(o instanceof Either<?, ?>)) return false;
+
+        Either<?, ?> that = (Either<?, ?>) o;
+
+        if(hasLeft() && that.hasLeft()) return left.equals(that.left);
+        if(hasRight() && that.hasRight()) return right.equals(that.right);
+        return false;
+    }
 }

common/src/main/java/com/dfsek/terra/api/util/generic/pair/ImmutablePair.java

@@ -1,5 +1,7 @@
 package com.dfsek.terra.api.util.generic.pair;
 
+import java.util.Objects;
+
 public class ImmutablePair<L, R> {
     private final L left;
     private final R right;
@@ -24,4 +26,15 @@ public class ImmutablePair<L, R> {
     public Pair<L, R> mutable() {
         return new Pair<>(left, right);
     }
+    @Override
+    public int hashCode() {
+        return Objects.hash(left, right);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if(!(o instanceof ImmutablePair)) return false;
+        ImmutablePair<?, ?> that = (ImmutablePair<?, ?>) o;
+        return that.left.equals(left) && that.right.equals(right);
+    }
 }

common/src/main/java/com/dfsek/terra/api/util/generic/pair/Pair.java

@@ -1,5 +1,7 @@
 package com.dfsek.terra.api.util.generic.pair;
 
+import java.util.Objects;
+
 public class Pair<L, R> {
     private L left;
     private R right;
@@ -32,4 +34,16 @@ public class Pair<L, R> {
     public ImmutablePair<L, R> immutable() {
         return new ImmutablePair<>(left, right);
     }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(left, right);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if(!(o instanceof Pair)) return false;
+        Pair<?, ?> that = (Pair<?, ?>) o;
+        return that.left.equals(left) && that.right.equals(right);
+    }
 }

common/src/main/java/com/dfsek/terra/config/templates/StructureTemplate.java

@@ -4,16 +4,20 @@ import com.dfsek.tectonic.annotations.Abstractable;
 import com.dfsek.tectonic.annotations.Default;
 import com.dfsek.tectonic.annotations.Value;
 import com.dfsek.tectonic.config.ConfigTemplate;
+import com.dfsek.tectonic.config.ValidatedConfigTemplate;
+import com.dfsek.tectonic.exception.ValidationException;
 import com.dfsek.terra.api.math.GridSpawn;
 import com.dfsek.terra.api.math.Range;
 import com.dfsek.terra.api.structures.script.StructureScript;
 import com.dfsek.terra.api.util.GlueList;
 import com.dfsek.terra.api.util.collections.ProbabilityCollection;
+import org.checkerframework.checker.units.qual.A;
 
+import java.time.Duration;
 import java.util.List;
 
 @SuppressWarnings({"unused", "FieldMayBeFinal"})
-public class StructureTemplate extends AbstractableTemplate implements ConfigTemplate {
+public class StructureTemplate extends AbstractableTemplate implements ValidatedConfigTemplate {
     @Value("id")
     private String id;
 
@@ -34,6 +38,21 @@ public class StructureTemplate extends AbstractableTemplate implements ConfigTem
     @Default
     private List<Void> features = new GlueList<>();
 
+    @Value("repeat.scripts")
+    @Default
+    @Abstractable
+    private ProbabilityCollection<StructureScript> repeatScripts = new ProbabilityCollection<>();
+
+    @Value("repeat.ticks.min")
+    @Default
+    @Abstractable
+    private long minRepeat = 20;
+
+    @Value("repeat.ticks.max")
+    @Default
+    @Abstractable
+    private long maxRepeat = 20;
+
     public String getID() {
         return id;
     }
@@ -53,4 +72,10 @@ public class StructureTemplate extends AbstractableTemplate implements ConfigTem
     public GridSpawn getSpawn() {
         return spawn;
     }
+
+    @Override
+    public boolean validate() throws ValidationException {
+        if(maxRepeat < minRepeat) throw new ValidationException("repeat.ticks.max must be greater than repeat.ticks.min");
+        return true;
+    }
 }

common/src/test/java/biome/DistributionTest.java

@@ -18,6 +18,7 @@ import com.dfsek.terra.api.platform.world.Biome;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.util.collections.ProbabilityCollection;
 import com.dfsek.terra.api.util.logging.DebugLogger;
 import com.dfsek.terra.api.util.logging.JavaLogger;
@@ -138,6 +139,11 @@ public class DistributionTest {
             return null;
         }
 
+        @Override
+        public TaskScheduler getScheduler() {
+            return null;
+        }
+
         @Override
         public Profiler getProfiler() {
             return null;

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/TerraBukkitPlugin.java

@@ -18,6 +18,7 @@ import com.dfsek.terra.api.platform.world.Biome;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.util.logging.DebugLogger;
 import com.dfsek.terra.api.util.logging.JavaLogger;
 import com.dfsek.terra.api.util.logging.Logger;
@@ -32,6 +33,7 @@ import com.dfsek.terra.bukkit.listeners.CommonListener;
 import com.dfsek.terra.bukkit.listeners.PaperListener;
 import com.dfsek.terra.bukkit.listeners.SpigotListener;
 import com.dfsek.terra.bukkit.listeners.TerraListener;
+import com.dfsek.terra.bukkit.task.BukkitTaskScheduler;
 import com.dfsek.terra.bukkit.util.PaperUtil;
 import com.dfsek.terra.bukkit.world.BukkitBiome;
 import com.dfsek.terra.bukkit.world.BukkitWorld;
@@ -69,6 +71,8 @@ public class TerraBukkitPlugin extends JavaPlugin implements TerraPlugin {
 
     private final Profiler profiler = new ProfilerImpl();
 
+    private final TaskScheduler scheduler = new BukkitTaskScheduler(this);
+
     private final ConfigRegistry registry = new ConfigRegistry();
     private final CheckedRegistry<ConfigPack> checkedRegistry = new CheckedRegistry<>(registry);
 
@@ -151,6 +155,11 @@ public class TerraBukkitPlugin extends JavaPlugin implements TerraPlugin {
         return profiler;
     }
 
+    @Override
+    public TaskScheduler getScheduler() {
+        return scheduler;
+    }
+
     @Override
     public void onDisable() {
         BukkitChunkGeneratorWrapper.saveAll();

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/task/BukkitTaskScheduler.java

@@ -0,0 +1,33 @@
+package com.dfsek.terra.bukkit.task;
+
+import com.dfsek.terra.api.task.TaskScheduler;
+import com.dfsek.terra.bukkit.TerraBukkitPlugin;
+import org.bukkit.Bukkit;
+
+public class BukkitTaskScheduler implements TaskScheduler {
+    private final TerraBukkitPlugin plugin;
+
+    public BukkitTaskScheduler(TerraBukkitPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public void runTaskAsynchronously(Runnable task, long ticks) {
+        Bukkit.getScheduler().runTaskLaterAsynchronously(plugin, task, ticks);
+    }
+
+    @Override
+    public void runTask(Runnable task, long ticks) {
+        Bukkit.getScheduler().runTaskLater(plugin, task, ticks);
+    }
+
+    @Override
+    public void runTask(Runnable task) {
+        Bukkit.getScheduler().runTask(plugin, task);
+    }
+
+    @Override
+    public void runTaskAsynchronously(Runnable task) {
+        Bukkit.getScheduler().runTask(plugin, task);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/FabricUtil.java

@@ -0,0 +1,23 @@
+package com.dfsek.terra.fabric;
+
+import net.fabricmc.loader.api.FabricLoader;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.dedicated.MinecraftDedicatedServer;
+
+public class FabricUtil {
+    @SuppressWarnings("deprecation")
+    public static MinecraftServer getServer() {
+        Object game = FabricLoader.getInstance().getGameInstance();
+        if(game instanceof MinecraftDedicatedServer) {
+            return (MinecraftDedicatedServer) game;
+        } else if(game instanceof MinecraftClient) {
+            MinecraftClient client = (MinecraftClient) game;
+            if(!client.isIntegratedServerRunning()) {
+                throw new IllegalStateException("Client is not running integrated server: " + client);
+            }
+            return client.getServer();
+        }
+        throw new IllegalStateException("No MinecraftServer initialized: " + game);
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/TerraFabricPlugin.java

@@ -25,6 +25,7 @@ import com.dfsek.terra.api.platform.world.Tree;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.transform.NotNullValidator;
 import com.dfsek.terra.api.transform.Transformer;
 import com.dfsek.terra.api.util.logging.DebugLogger;
@@ -37,13 +38,14 @@ import com.dfsek.terra.config.lang.LangUtil;
 import com.dfsek.terra.config.lang.Language;
 import com.dfsek.terra.config.pack.ConfigPack;
 import com.dfsek.terra.config.templates.BiomeTemplate;
+import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
+import com.dfsek.terra.fabric.generation.PopulatorFeature;
+import com.dfsek.terra.fabric.generation.TerraBiomeSource;
 import com.dfsek.terra.fabric.handle.FabricItemHandle;
 import com.dfsek.terra.fabric.handle.FabricWorldHandle;
 import com.dfsek.terra.fabric.mixin.access.BiomeEffectsAccessor;
 import com.dfsek.terra.fabric.mixin.access.GeneratorTypeAccessor;
-import com.dfsek.terra.fabric.generation.TerraBiomeSource;
-import com.dfsek.terra.fabric.generation.PopulatorFeature;
-import com.dfsek.terra.fabric.generation.FabricChunkGeneratorWrapper;
+import com.dfsek.terra.fabric.task.FabricTaskScheduler;
 import com.dfsek.terra.profiler.Profiler;
 import com.dfsek.terra.profiler.ProfilerImpl;
 import com.dfsek.terra.registry.exception.DuplicateEntryException;
@@ -97,7 +99,6 @@ import static net.minecraft.server.command.CommandManager.literal;
 
 
 public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
-
     public static final PopulatorFeature POPULATOR_FEATURE = new PopulatorFeature(DefaultFeatureConfig.CODEC);
     public static final ConfiguredFeature<?, ?> POPULATOR_CONFIGURED_FEATURE = POPULATOR_FEATURE.configure(FeatureConfig.DEFAULT).decorate(Decorator.NOPE.configure(NopeDecoratorConfig.INSTANCE));
     private static TerraFabricPlugin instance;
@@ -136,6 +137,8 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
     private final Transformer<String, Biome> biomeFixer = new Transformer.Builder<String, Biome>()
             .addTransform(id -> BuiltinRegistries.BIOME.get(Identifier.tryParse(id)), new NotNullValidator<>())
             .addTransform(id -> BuiltinRegistries.BIOME.get(Identifier.tryParse("minecraft:" + id.toLowerCase())), new NotNullValidator<>()).build();
+
+    private final TaskScheduler scheduler = new FabricTaskScheduler();
     private File dataFolder;
 
     public static TerraFabricPlugin getInstance() {
@@ -407,11 +410,15 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
         return profiler;
     }
 
+    @Override
+    public TaskScheduler getScheduler() {
+        return scheduler;
+    }
+
     @Addon("Terra-Fabric")
     @Author("Terra")
     @Version("1.0.0")
     private static final class FabricAddon extends TerraAddon implements EventListener {
-
         private final TerraPlugin main;
 
         private FabricAddon(TerraPlugin main) {
@@ -448,7 +455,6 @@ public class TerraFabricPlugin implements TerraPlugin, ModInitializer {
             injectTree(treeRegistry, "WARPED_FUNGUS", ConfiguredFeatures.WARPED_FUNGI);
         }
 
-
         private void injectTree(CheckedRegistry<Tree> registry, String id, ConfiguredFeature<?, ?> tree) {
             try {
                 registry.add(id, (Tree) tree);

platforms/fabric/src/main/java/com/dfsek/terra/fabric/task/FabricTaskScheduler.java

@@ -0,0 +1,25 @@
+package com.dfsek.terra.fabric.task;
+
+import com.dfsek.terra.api.task.TaskScheduler;
+import com.dfsek.terra.fabric.FabricUtil;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.ServerTask;
+import net.minecraft.util.Util;
+
+public class FabricTaskScheduler implements TaskScheduler {
+    @Override
+    public void runTaskAsynchronously(Runnable task, long ticks) {
+        runTask(() -> Util.getMainWorkerExecutor().execute(task), ticks);
+    }
+
+    @Override
+    public void runTaskAsynchronously(Runnable task) {
+        Util.getMainWorkerExecutor().execute(task);
+    }
+
+    @Override
+    public void runTask(Runnable task, long ticks) {
+        MinecraftServer server = FabricUtil.getServer();
+        server.send(new ServerTask(server.getTicks() + (int) ticks, task));
+    }
+}

platforms/forge/src/main/java/com/dfsek/terra/forge/TerraForgePlugin.java

@@ -24,6 +24,7 @@ import com.dfsek.terra.api.platform.world.Tree;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.transform.NotNullValidator;
 import com.dfsek.terra.api.transform.Transformer;
 import com.dfsek.terra.api.util.JarUtil;
@@ -311,6 +312,11 @@ public class TerraForgePlugin implements TerraPlugin {
         return JarUtil.getJarFile();
     }
 
+    @Override
+    public TaskScheduler getScheduler() {
+        return null;
+    }
+
     public TerraWorld getWorld(long seed) {
         TerraWorld world = worldMap.get(seed);
         if(world == null) throw new IllegalArgumentException("No world exists with seed " + seed);

platforms/region/src/main/java/com/dfsek/terra/StandalonePlugin.java

@@ -12,6 +12,7 @@ import com.dfsek.terra.api.platform.world.Biome;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.util.logging.DebugLogger;
 import com.dfsek.terra.api.util.logging.JavaLogger;
 import com.dfsek.terra.config.GenericLoaders;
@@ -156,4 +157,9 @@ public class StandalonePlugin implements TerraPlugin {
     public Profiler getProfiler() {
         return profiler;
     }
+
+    @Override
+    public TaskScheduler getScheduler() {
+        return null;
+    }
 }

platforms/sponge/src/main/java/com/dfsek/terra/sponge/TerraSpongePlugin.java

@@ -10,6 +10,7 @@ import com.dfsek.terra.api.platform.handle.WorldHandle;
 import com.dfsek.terra.api.platform.world.World;
 import com.dfsek.terra.api.registry.CheckedRegistry;
 import com.dfsek.terra.api.registry.LockedRegistry;
+import com.dfsek.terra.api.task.TaskScheduler;
 import com.dfsek.terra.api.util.logging.DebugLogger;
 import com.dfsek.terra.config.PluginConfig;
 import com.dfsek.terra.config.lang.Language;
@@ -140,6 +141,11 @@ public class TerraSpongePlugin implements TerraPlugin {
         return eventManager;
     }
 
+    @Override
+    public TaskScheduler getScheduler() {
+        return null;
+    }
+
     @Override
     public Profiler getProfiler() {
         return null;