[1.12.x] Implement hooks allowing mods to add horse armor. Partially addresses #3975. (#3994)

src/main/java/net/minecraftforge/client/ForgeHooksClient.java

@@ -75,6 +75,8 @@ import net.minecraft.client.resources.I18n;
 import net.minecraft.client.settings.GameSettings;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityLivingBase;
+import net.minecraft.entity.passive.EntityHorse;
+import net.minecraft.entity.passive.HorseArmorType;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.inventory.EntityEquipmentSlot;
 import net.minecraft.item.Item;
@@ -754,4 +756,11 @@ public class ForgeHooksClient
     {
         MinecraftForge.EVENT_BUS.post(new InputUpdateEvent(player, movementInput));
     }
+    
+    public static String getHorseArmorTexture(EntityHorse horse, ItemStack armorStack)
+    {
+        String texture = armorStack.getItem().getHorseArmorTexture(horse, armorStack);
+        if(texture == null) texture = horse.getHorseArmorType().getTextureName();
+        return texture;
+    }
 }

src/main/java/net/minecraftforge/common/util/EnumHelper.java

@@ -34,6 +34,7 @@ import net.minecraft.enchantment.EnumEnchantmentType;
 import net.minecraft.entity.EnumCreatureAttribute;
 import net.minecraft.entity.EnumCreatureType;
 import net.minecraft.entity.item.EntityPainting.EnumArt;
+import net.minecraft.entity.passive.HorseArmorType;
 import net.minecraft.entity.player.EntityPlayer.SleepResult;
 import net.minecraft.item.EnumAction;
 import net.minecraft.item.EnumRarity;
@@ -74,7 +75,8 @@ public class EnumHelper
         {EnumSkyBlock.class, int.class},
         {SleepResult.class},
         {ToolMaterial.class, int.class, int.class, float.class, float.class, int.class},
-        {EnumRarity.class, TextFormatting.class, String.class}
+        {EnumRarity.class, TextFormatting.class, String.class},
+        {HorseArmorType.class, String.class, int.class}
     };
 
     @Nullable
@@ -143,6 +145,19 @@ public class EnumHelper
         return addEnum(EnumRarity.class, name, color, displayName);
     }
 
+    /**
+     * 
+     * @param name the name of the new {@code HorseArmorType}
+     * @param textureLocation the path to the texture for this armor type. It must follow the format domain:path and be relative to the assets folder.
+     * @param armorStrength how much protection this armor type should give
+     * @return the new {@code HorseArmorType}, or null if it could not be created
+     */
+    @Nullable 
+    public static HorseArmorType addHorseArmor(String name, String textureLocation, int armorStrength)
+    {
+        return addEnum(HorseArmorType.class, name, textureLocation, armorStrength);
+    }
+
     private static void setup()
     {
         if (isSetup)