IMC API for adding new altar components (#1039)

CC @Drullkus

src/main/java/WayofTime/bloodmagic/altar/BloodAltar.java

@@ -129,9 +129,12 @@ public class BloodAltar implements IFluidHandler
                     EnumAltarComponent component = ((IAltarComponent) worldBlock.getBlock()).getType(world, worldBlock.getState(), componentPos);
                     if (component == null || component != altarComponent.getComponent())
                         return false;
-                } else if (worldBlock.getBlock() != Utils.getBlockForComponent(altarComponent.getComponent()))
+                } else if (worldBlock.getBlock() != Utils.getBlockForComponent(altarComponent.getComponent())) // Special case Vanilla
                 {
                     return false;
+                } else if (BloodMagicAPI.getAltarComponents().get(worldBlock.getState()) != null) // Mod compat
+                {
+                    return BloodMagicAPI.getAltarComponents().get(worldBlock.getState()) == altarComponent.getComponent();
                 }
             } else
             {

src/main/java/WayofTime/bloodmagic/api/BloodMagicAPI.java

@@ -1,9 +1,11 @@
 package WayofTime.bloodmagic.api;
 
+import WayofTime.bloodmagic.api.altar.EnumAltarComponent;
 import WayofTime.bloodmagic.api.util.helper.LogHelper;
 import lombok.Getter;
 import lombok.Setter;
 import net.minecraft.block.Block;
+import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.EntityLivingBase;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -40,6 +42,8 @@ public class BloodMagicAPI
     private static final Map<String, Integer> entitySacrificeValues = new HashMap<String, Integer>();
     @Getter
     private static final ArrayList<Block> greenGroveBlacklist = new ArrayList<Block>();
+    @Getter
+    private static final Map<IBlockState, EnumAltarComponent> altarComponents = new HashMap<IBlockState, EnumAltarComponent>();
 
     @Getter
     @Setter
@@ -261,4 +265,24 @@ public class BloodMagicAPI
         if (!greenGroveBlacklist.contains(block))
             greenGroveBlacklist.add(block);
     }
+
+    /**
+     * Marks an IBlockState as a specific {@link EnumAltarComponent} without needing to implement
+     * {@link WayofTime.bloodmagic.api.altar.IAltarComponent} on the block.
+     *
+     * IMC:
+     * {@code FMLInterModComs.sendMessage("BloodMagic", "altarComponent", "domain:name:meta:component")}
+     * Example:
+     * {@code FMLInterModComs.sendMessage("BloodMagic", "altarComponent", "minecraft:glowstone:0:GLOWSTONE")}
+     *
+     * @param state
+     *        - The IBlockState for this component
+     * @param altarComponent
+     *        - The EnumAltarComponent for this state
+     */
+    public static void addAltarComponent(IBlockState state, EnumAltarComponent altarComponent)
+    {
+        if (!altarComponents.containsKey(state))
+            altarComponents.put(state, altarComponent);
+    }
 }

src/main/java/WayofTime/bloodmagic/util/handler/IMCHandler.java

@@ -1,6 +1,7 @@
 package WayofTime.bloodmagic.util.handler;
 
 import WayofTime.bloodmagic.api.BloodMagicAPI;
+import WayofTime.bloodmagic.api.altar.EnumAltarComponent;
 import WayofTime.bloodmagic.util.Utils;
 import net.minecraft.block.Block;
 import net.minecraft.item.ItemBlock;
@@ -54,6 +55,17 @@ public class IMCHandler
                         BloodMagicAPI.blacklistFromGreenGrove(block);
                 }
             }
+
+            if (message.key.equals("altarComponent") && message.isStringMessage())
+            {
+                String[] splitInfo = message.getStringValue().split(":");
+                if (splitInfo.length == 4)
+                {
+                    Block block = ForgeRegistries.BLOCKS.getValue(new ResourceLocation(splitInfo[0], splitInfo[1]));
+                    if (block != null)
+                        BloodMagicAPI.addAltarComponent(block.getStateFromMeta(Integer.parseInt(splitInfo[2])), EnumAltarComponent.valueOf(splitInfo[3]));
+                }
+            }
         }
     }
 }