Start of Celestial Events

Added CelestialEvent.
Added the Register Event.
Added Test Items.
Current Features:
- Adjustable Intervals
- Day Offset to offset the Interval
- Custom Day Length
- Custom Chance for successful Activation
- Mutually exclusive Events

Author: Atilist

src/test/java/net/modificationstation/sltest/celestial/CelestialListener.java

@@ -0,0 +1,24 @@
+package net.modificationstation.sltest.celestial;
+
+import net.mine_diver.unsafeevents.listener.EventListener;
+import net.modificationstation.sltest.SLTest;
+import net.modificationstation.stationapi.api.celestial.CelestialEvent;
+import net.modificationstation.stationapi.api.event.celestial.CelestialRegisterEvent;
+
+public class CelestialListener {
+
+    private boolean hasRegistered = false; // Workaround to prevent excessive registering
+
+    public static CelestialEvent flyingDimando;
+    public static CelestialEvent fallingDimando;
+
+    @EventListener
+    public void registerCelestialEvents(CelestialRegisterEvent event) {
+        if (hasRegistered) return;
+        hasRegistered = true;
+        SLTest.LOGGER.info("Register celestial events for testing");
+        flyingDimando = new CelestialEvent(2);
+        fallingDimando = new CelestialEvent(4);
+        flyingDimando.addIncompatibleEvent(fallingDimando);
+    }
+}

src/test/java/net/modificationstation/sltest/item/CelestialTestItem.java

@@ -0,0 +1,21 @@
+package net.modificationstation.sltest.item;
+
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.world.World;
+import net.modificationstation.sltest.celestial.CelestialListener;
+import net.modificationstation.stationapi.api.template.item.TemplateItem;
+import net.modificationstation.stationapi.api.util.Identifier;
+
+public class CelestialTestItem extends TemplateItem {
+    public CelestialTestItem(Identifier identifier) {
+        super(identifier);
+    }
+
+    @Override
+    public ItemStack use(ItemStack item, World world, PlayerEntity player) {
+        if (CelestialListener.flyingDimando.isActive()) System.out.println("Event is happening");
+        else System.out.println("No event");
+        return super.use(item, world, player);
+    }
+}

src/test/java/net/modificationstation/sltest/item/CelestialToggleItem.java

@@ -0,0 +1,35 @@
+package net.modificationstation.sltest.item;
+
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.world.World;
+import net.modificationstation.sltest.celestial.CelestialListener;
+import net.modificationstation.stationapi.api.template.item.TemplateItem;
+import net.modificationstation.stationapi.api.util.Identifier;
+
+public class CelestialToggleItem extends TemplateItem {
+    public CelestialToggleItem(Identifier identifier) {
+        super(identifier);
+    }
+
+    @Override
+    public ItemStack use(ItemStack item, World world, PlayerEntity player) {
+        if (CelestialListener.fallingDimando.isActive()) {
+            CelestialListener.fallingDimando.stopEvent();
+            System.out.println("Stopping Falling Dimando");
+        } else if (CelestialListener.fallingDimando.activateEvent(world.getTime(), random)) {
+            System.out.println("Activating Falling Dimando");
+        } else {
+            System.out.println("Falling Dimando not activated");
+        }
+        if (CelestialListener.flyingDimando.isActive()) {
+            CelestialListener.flyingDimando.stopEvent();
+            System.out.println("Stopping Flying Dimando");
+        } else if (CelestialListener.flyingDimando.activateEvent(world.getTime(), random)) {
+            System.out.println("Activating Flying Dimando");
+        } else {
+            System.out.println("Flying Dimando not activated");
+        }
+        return super.use(item, world, player);
+    }
+}

src/test/java/net/modificationstation/sltest/item/ItemListener.java

@@ -38,8 +38,8 @@ public void registerItems(ItemRegistryEvent event) {
         testShears = new TestShearsItem(NAMESPACE.id("test_shears")).setTranslationKey(NAMESPACE, "test_shears");
         pacifistSword = new PacifistSwordItem(NAMESPACE.id("pacifist_sword")).setTranslationKey(NAMESPACE, "pacifist_sword");
         dullPickaxe = new DullPickaxeItem(NAMESPACE.id("dull_pickaxe")).setTranslationKey(NAMESPACE, "dull_pickaxe");
-
-
+        celestialTestItem = new CelestialTestItem(NAMESPACE.id("test_celestial")).setTranslationKey(NAMESPACE, "test_celestial");
+        celestialToggleItem = new CelestialToggleItem(NAMESPACE.id("toggle_celestial")).setTranslationKey(NAMESPACE, "toggle_celestial");
     }
 
     public static Item testItem;
@@ -55,4 +55,6 @@ public void registerItems(ItemRegistryEvent event) {
     public static Item testShears;
     public static Item pacifistSword;
     public static Item dullPickaxe;
+    public static Item celestialTestItem;
+    public static Item celestialToggleItem;
 }

src/test/resources/fabric.mod.json

@@ -32,7 +32,9 @@
       "net.modificationstation.sltest.item.tool.ToolListener",
       "net.modificationstation.sltest.datafixer.DataFixerListener",
       "net.modificationstation.sltest.worldgen.TestWorldgenListener",
-      "net.modificationstation.sltest.bonemeal.BonemealListener"
+      "net.modificationstation.sltest.bonemeal.BonemealListener",
+      "net.modificationstation.sltest.dispenser.DispenserListener",
+      "net.modificationstation.sltest.celestial.CelestialListener"
     ],
     "stationapi:event_bus_client": [
       "net.modificationstation.sltest.gui.GuiListener",

station-world-events-v0/src/main/java/net/modificationstation/stationapi/api/celestial/CelestialEvent.java

@@ -0,0 +1,68 @@
+package net.modificationstation.stationapi.api.celestial;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Random;
+
+public class CelestialEvent {
+    private final int frequency;
+    private final float chance;
+    private final int dayLength;
+    private final int dayOffset;
+    private boolean active;
+    private final List<CelestialEvent> incompatibleEvents = new LinkedList<>();
+
+    public CelestialEvent(int frequency, float chance, int dayLength, int dayOffset) {
+        this.frequency = frequency;
+        this.chance = chance;
+        this.dayLength = dayLength;
+        this.dayOffset = dayOffset;
+    }
+
+    public CelestialEvent(int frequency, float chance, int dayLength) {
+        this(frequency, chance, dayLength, 0);
+    }
+
+    public CelestialEvent(int frequency, float chance) {
+        this(frequency, chance, 24000);
+    }
+
+    public CelestialEvent(int frequency) {
+        this(frequency, 1);
+    }
+
+    public boolean activateEvent(long worldTime, Random random) {
+        if (active) {
+            return true;
+        }
+        for (CelestialEvent otherEvent : incompatibleEvents) {
+            if (otherEvent == null) continue;
+            if (otherEvent.isActive()) {
+                active = false;
+                return false;
+            }
+        }
+        long days = worldTime / dayLength + dayOffset;
+        active = days % frequency == 0 && random.nextFloat() <= chance;
+        return active;
+    }
+
+    public void stopEvent() {
+        active = false;
+    }
+
+    public boolean isActive() {
+        return active;
+    }
+
+    /**
+     * Adds events to prevent them from happening simultaneously.
+     * Automatically adds incompatibility for both directions.
+     * @param otherEvent
+     */
+    public void addIncompatibleEvent(CelestialEvent otherEvent) {
+        if (incompatibleEvents.contains(otherEvent)) return;
+        incompatibleEvents.add(otherEvent);
+        otherEvent.addIncompatibleEvent(this);
+    }
+}

station-world-events-v0/src/main/java/net/modificationstation/stationapi/api/event/celestial/CelestialRegisterEvent.java

@@ -0,0 +1,7 @@
+package net.modificationstation.stationapi.api.event.celestial;
+
+import lombok.experimental.SuperBuilder;
+import net.mine_diver.unsafeevents.Event;
+
+@SuperBuilder
+public class CelestialRegisterEvent extends Event {}

station-world-events-v0/src/main/java/net/modificationstation/stationapi/mixin/world/WorldPropertiesMixin.java

@@ -3,6 +3,7 @@
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.world.WorldProperties;
 import net.modificationstation.stationapi.api.StationAPI;
+import net.modificationstation.stationapi.api.event.celestial.CelestialRegisterEvent;
 import net.modificationstation.stationapi.api.event.world.WorldPropertiesEvent;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
@@ -37,4 +38,14 @@ private void stationapi_onSaveToTag(NbtCompound arg, NbtCompound arg1, CallbackI
                         .build()
         );
     }
+
+    @Inject(
+            method = "setTime",
+            at = @At("HEAD")
+    )
+    private void stationapi_postCelestialEvent(CallbackInfo ci) { // This gets called more than once. Does not really make sense with the way the events work
+        StationAPI.EVENT_BUS.post(
+                CelestialRegisterEvent.builder().build()
+        );
+    }
 }