feat: ability tooltip display system

Author: bconlon1

.gitignore

@@ -20,6 +20,7 @@ build
 # other
 eclipse
 run
+runs
 __pycache__
 logs
 

src/main/java/com/aetherteam/nitrogen/data/providers/NitrogenLanguageProvider.java

@@ -1,5 +1,6 @@
 package com.aetherteam.nitrogen.data.providers;
 
+import com.aetherteam.nitrogen.Nitrogen;
 import net.minecraft.data.DataGenerator;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
@@ -20,6 +21,14 @@ public NitrogenLanguageProvider(DataGenerator output, String id) {
         this.id = id;
     }
 
+    public void addPerItemAbilityTooltip(Item item, int index, String name) {
+        this.add(item.getDescriptionId() + "." + Nitrogen.MODID + ".ability.tooltip." + index, name);
+    }
+
+    public void addPerItemAbilityTooltip(Item item, int index, String condition, String name) {
+        this.add(item.getDescriptionId() + "." + Nitrogen.MODID + ".ability.tooltip." + index + "." + condition, name);
+    }
+
     public void addDiscDesc(Supplier<? extends Item> key, String name) {
         this.add(key.get().getDescriptionId() + ".desc", name);
     }

src/main/java/com/aetherteam/nitrogen/event/listeners/TooltipListeners.java

@@ -0,0 +1,48 @@
+package com.aetherteam.nitrogen.event.listeners;
+
+import com.aetherteam.nitrogen.Nitrogen;
+import net.minecraft.client.resources.language.I18n;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.network.chat.Component;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.item.ItemStack;
+import net.minecraftforge.event.entity.player.ItemTooltipEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@Mod.EventBusSubscriber(modid = Nitrogen.MODID)
+public class TooltipListeners {
+    public static Map<ResourceLocation, TooltipPredicate> PREDICATES = new HashMap<>();
+
+    @SubscribeEvent
+    public static void onTooltipCreationLowPriority(ItemTooltipEvent event) {
+        Player player = event.getEntity();
+        ItemStack itemStack = event.getItemStack();
+        List<Component> itemTooltips = event.getToolTip();
+        addAbilityTooltips(player, itemStack, itemTooltips);
+    }
+
+    public static void addAbilityTooltips(Player player, ItemStack stack, List<Component> components) {
+        for (int i = 1; i <= 5; i++) {
+            String string = stack.getDescriptionId() + "." + Nitrogen.MODID + ".ability.tooltip." + i;
+            if (I18n.exists(string)) {
+                Component component = Component.translatable(string);
+                ResourceLocation location = BuiltInRegistries.ITEM.getKey(stack.getItem());
+                if (PREDICATES.containsKey(location)) {
+                    component = PREDICATES.get(location).override(player, stack, components, component);
+                }
+                components.add(i, component);
+            }
+        }
+    }
+
+    @FunctionalInterface
+    public interface TooltipPredicate {
+        Component override(Player player, ItemStack stack, List<Component> components,  Component component);
+    }
+}