Add persistEnchantedBooksOnly config option

src/main/java/cool/furry/mc/forge/projectexpansion/config/Config.java

@@ -24,5 +24,6 @@ public final class Config {
     public static final ForgeConfigSpec.ConfigValue<Integer> infiniteFuelCost = Builder.comment("The cost of using the infinite fuel item.").defineInRange("infiniteFuelCost", 128, 1, Integer.MAX_VALUE);
     public static final ForgeConfigSpec.ConfigValue<Integer> infiniteFuelBurnTime = Builder.comment("The ticks each usage of the infinite fuel item will give.").defineInRange("infiniteFuelBurnTime", 1600, 1, Integer.MAX_VALUE);
     public static final ForgeConfigSpec.ConfigValue<Integer> infiniteSteakCost = Builder.comment("The cost of using the infinite steak item.").defineInRange("infiniteSteakCost", 64, 1, Integer.MAX_VALUE);
+    public static final ForgeConfigSpec.ConfigValue<Boolean> persistEnchantedBooksOnly = Builder.comment("If ProjectE's processors.EnchantmentProcessor.persistent option should only include enchanted books.").define("persistEnchantedBooksOnly", false);
     static { Spec = Builder.build(); }
 }

src/main/java/cool/furry/mc/forge/projectexpansion/mixin/EnchantmentProcessorMixin.java

@@ -0,0 +1,21 @@
+package cool.furry.mc.forge.projectexpansion.mixin;
+
+import cool.furry.mc.forge.projectexpansion.config.Config;
+import moze_intel.projecte.api.ItemInfo;
+import moze_intel.projecte.emc.nbt.processor.EnchantmentProcessor;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.item.Items;
+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;
+
+@Mixin(EnchantmentProcessor.class)
+public class EnchantmentProcessorMixin {
+    @Inject(at = @At("HEAD"), method = "getPersistentNBT(Lmoze_intel/projecte/api/ItemInfo;)Lnet/minecraft/nbt/CompoundTag;", cancellable = true, remap = false)
+    public void getPersistentNBT(ItemInfo info, CallbackInfoReturnable<CompoundTag> cir) {
+        if(Config.persistEnchantedBooksOnly.get() && info.getItem() != Items.ENCHANTED_BOOK) {
+            cir.setReturnValue(null);
+        }
+    }
+}

src/main/java/cool/furry/mc/forge/projectexpansion/mixin/package-info.java

@@ -0,0 +1,7 @@
+@ParametersAreNonnullByDefault
+@MethodsReturnNonnullByDefault
+package cool.furry.mc.forge.projectexpansion.mixin;
+
+
+import net.minecraft.MethodsReturnNonnullByDefault;
+import javax.annotation.ParametersAreNonnullByDefault;

src/main/resources/projectexpansion.mixins.json

@@ -1,19 +1,20 @@
 {
-  "required":           true,
-  "minVersion":         "0.8",
-  "package":            "cool.furry.mc.forge.projectexpansion.mixin",
-  "compatibilityLevel": "JAVA_17",
-  "refmap":             "projectexpansion.refmap.json",
-  "client":             [
-    "DeleteWeebShitMixin",
-    "EMCFormatterMixin"
-  ],
-  "mixins":             [
-    "AlchemicalBagMixin",
-    "EnchantmentMixin",
-    "PhilosophersStoneMixin"
-  ],
-  "injectors":          {
-    "defaultRequire": 1
+	"required": true,
+	"minVersion": "0.8",
+	"package": "cool.furry.mc.forge.projectexpansion.mixin",
+	"compatibilityLevel": "JAVA_17",
+	"refmap": "projectexpansion.refmap.json",
+	"client": [
+		"DeleteWeebShitMixin",
+		"EMCFormatterMixin"
+	],
+	"mixins": [
+		"AlchemicalBagMixin",
+		"EnchantmentMixin",
+		"EnchantmentProcessorMixin",
+		"PhilosophersStoneMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
 	}
 }