use efr lanterns everywhere

dependencies.gradle

@@ -24,4 +24,5 @@
 dependencies {
     api("com.github.GTNewHorizons:GTNHLib:0.2.3:dev")
     implementation("com.github.GTNewHorizons:ForestryMC:4.8.5:dev")
+    compileOnly(rfg.deobf("curse.maven:et-futurum-requiem-441392:5268121")) { transitive = false }
 }

src/main/java/de/pilz/sammelsorium/LateMixinPlugin.java

@@ -26,6 +26,10 @@ public List<String> getMixins(Set<String> loadedMods) {
             list.add("MixinForestryPostRegistry");
         }
 
+        if (loadedMods.contains("etfuturum")) {
+            list.add("MixinBlockLantern");
+        }
+
         return list;
     }
 }

src/main/java/de/pilz/sammelsorium/configuration/ModIntegrationConfigs.java

@@ -21,4 +21,9 @@ public class ModIntegrationConfigs {
     @Config.DefaultBoolean(false)
     @Config.RequiresMcRestart
     public static boolean forestryMailFixOfflineUUDID;
+
+    @Config.Comment("Allows to place lanterns of EFR everywhere.")
+    @Config.DefaultBoolean(true)
+    @Config.RequiresMcRestart
+    public static boolean etfuturumPlaceBlockLanternAnywhere;
 }

src/main/java/de/pilz/sammelsorium/mixins/MixinBlockLantern.java

@@ -0,0 +1,24 @@
+package de.pilz.sammelsorium.mixins;
+
+import net.minecraft.world.World;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import de.pilz.sammelsorium.configuration.ModIntegrationConfigs;
+import ganymedes01.etfuturum.blocks.BlockLantern;
+
+@Mixin(BlockLantern.class)
+public abstract class MixinBlockLantern {
+
+    @Inject(method = "canPlaceBlockAt(Lnet/minecraft/world/World;III)Z", at = @At("HEAD"), cancellable = true)
+    public void pilzmcsammelsorium$canPlaceBlockAt(World world, int x, int y, int z,
+        CallbackInfoReturnable<Boolean> callback) {
+        if (ModIntegrationConfigs.etfuturumPlaceBlockLanternAnywhere) {
+            callback.setReturnValue(true);
+            callback.cancel();
+        }
+    }
+}