Add custom model predicates

Add regex support

Add and and or predicates

24 files changed, 620 insertions, 13 deletions

diff --git a/build.gradle.kts b/build.gradle.kts
index 7662f06..38c1b9f 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,6 +1,10 @@
-// SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
-//
-// SPDX-License-Identifier: CC0-1.0
+/*
+ * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: CC0-1.0
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
 
 import moe.nea.licenseextractificator.LicenseDiscoveryTask
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
@@ -149,8 +153,14 @@ dependencies {
     transInclude.resolvedConfiguration.resolvedArtifacts.forEach {
         include(it.moduleVersion.id.toString())
     }
+
+
+    testImplementation("org.junit.jupiter:junit-jupiter:5.9.2")
 }
 
+tasks.test {
+    useJUnitPlatform()
+}
 
 version = rootProject.property("mod_version").toString()
 group = rootProject.property("maven_group").toString()
@@ -187,11 +197,6 @@ tasks.jar {
 tasks.shadowJar {
     configurations = listOf(shadowMe)
     archiveClassifier.set("dev")
-    doLast {
-        configurations.forEach {
-            println("Copying files into jar: ${it.files}")
-        }
-    }
     relocate("io.github.moulberry.repo", "moe.nea.firmament.deps.repo")
     destinationDirectory.set(layout.buildDirectory.dir("badjars"))
 }
@@ -205,10 +210,10 @@ tasks.remapJar {
 
 tasks.processResources {
     val replacements = listOf(
-        "version" to project.version,
+        "version" to project.version.toString(),
         "minecraft_version" to libs.versions.minecraft.get(),
         "fabric_kotlin_version" to libs.versions.fabric.kotlin.get()
-    ).map { (k, v) -> k to v.toString() }
+    )
     replacements.forEach { (key, value) -> inputs.property(key, value) }
     filesMatching("**/fabric.mod.json") {
         expand(*replacements.toTypedArray())
diff --git a/src/main/java/moe/nea/firmament/mixins/custommodels/BakedOverrideDataHolder.java b/src/main/java/moe/nea/firmament/mixins/custommodels/BakedOverrideDataHolder.java
new file mode 100644
index 0000000..5e5f863
--- /dev/null
+++ b/src/main/java/moe/nea/firmament/mixins/custommodels/BakedOverrideDataHolder.java
@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.custommodels;
+
+import moe.nea.firmament.features.texturepack.BakedOverrideData;
+import moe.nea.firmament.features.texturepack.FirmamentModelPredicate;
+import net.minecraft.client.render.model.json.ModelOverrideList;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+
+@Mixin(ModelOverrideList.BakedOverride.class)
+public class BakedOverrideDataHolder implements BakedOverrideData {
+
+    @Unique
+    private FirmamentModelPredicate[] firmamentOverrides;
+
+    @Nullable
+    @Override
+    public FirmamentModelPredicate[] getFirmamentOverrides() {
+        return firmamentOverrides;
+    }
+
+    @Override
+    public void setFirmamentOverrides(@NotNull FirmamentModelPredicate[] overrides) {
+        this.firmamentOverrides = overrides;
+    }
+}
diff --git a/src/main/java/moe/nea/firmament/mixins/custommodels/ModelOverrideDataHolder.java b/src/main/java/moe/nea/firmament/mixins/custommodels/ModelOverrideDataHolder.java
new file mode 100644
index 0000000..8a476db
--- /dev/null
+++ b/src/main/java/moe/nea/firmament/mixins/custommodels/ModelOverrideDataHolder.java
@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.custommodels;
+
+import moe.nea.firmament.features.texturepack.FirmamentModelPredicate;
+import moe.nea.firmament.features.texturepack.ModelOverrideData;
+import net.minecraft.client.render.model.json.ModelOverride;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Unique;
+
+@Mixin(ModelOverride.class)
+public class ModelOverrideDataHolder implements ModelOverrideData {
+
+    @Unique
+    private FirmamentModelPredicate[] overrides;
+
+    @Nullable
+    @Override
+    public FirmamentModelPredicate[] getFirmamentOverrides() {
+        return overrides;
+    }
+
+    @Override
+    public void setFirmamentOverrides(@NotNull FirmamentModelPredicate[] overrides) {
+        this.overrides = overrides;
+    }
+}
diff --git a/src/main/java/moe/nea/firmament/mixins/custommodels/PatchOverrideDeserializer.java b/src/main/java/moe/nea/firmament/mixins/custommodels/PatchOverrideDeserializer.java
new file mode 100644
index 0000000..e85bff0
--- /dev/null
+++ b/src/main/java/moe/nea/firmament/mixins/custommodels/PatchOverrideDeserializer.java
@@ -0,0 +1,55 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.custommodels;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+import com.llamalad7.mixinextras.injector.ModifyReturnValue;
+import com.llamalad7.mixinextras.sugar.Local;
+import moe.nea.firmament.features.texturepack.CustomModelOverrideParser;
+import moe.nea.firmament.features.texturepack.ModelOverrideData;
+import net.minecraft.client.render.model.json.ModelOverride;
+import net.minecraft.util.Identifier;
+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 java.util.List;
+import java.util.Map;
+
+@Mixin(ModelOverride.Deserializer.class)
+public class PatchOverrideDeserializer {
+
+    @ModifyReturnValue(
+        method = "deserialize(Lcom/google/gson/JsonElement;Ljava/lang/reflect/Type;Lcom/google/gson/JsonDeserializationContext;)Lnet/minecraft/client/render/model/json/ModelOverride;",
+        at = @At(value = "RETURN"))
+    private ModelOverride addCustomOverrides(ModelOverride original, @Local JsonObject jsonObject) {
+        var originalData = (ModelOverrideData) original;
+        originalData.setFirmamentOverrides(CustomModelOverrideParser.parseCustomModelOverrides(jsonObject));
+        return original;
+    }
+
+    @ModifyExpressionValue(
+        method = "deserializeMinPropertyValues(Lcom/google/gson/JsonObject;)Ljava/util/List;",
+        at = @At(value = "INVOKE", target = "Ljava/util/Map$Entry;getValue()Ljava/lang/Object;"))
+    private Object removeFirmamentPredicatesFromJsonIteration(Object original, @Local Map.Entry<String, JsonElement> entry) {
+        if (entry.getKey().startsWith("firmament:")) return new JsonPrimitive(0F);
+        return original;
+    }
+
+    @Inject(
+        method = "deserializeMinPropertyValues",
+        at = @At(value = "INVOKE", target = "Ljava/util/Map;entrySet()Ljava/util/Set;")
+    )
+    private void whatever(JsonObject object, CallbackInfoReturnable<List<ModelOverride.Condition>> cir,
+                          @Local Map<Identifier, Float> maps) {
+        maps.entrySet().removeIf(it -> it.getKey().getNamespace().equals("firmament"));
+    }
+}
diff --git a/src/main/java/moe/nea/firmament/mixins/custommodels/TestForFirmamentOverridePredicatesPatch.java b/src/main/java/moe/nea/firmament/mixins/custommodels/TestForFirmamentOverridePredicatesPatch.java
new file mode 100644
index 0000000..4db9fc0
--- /dev/null
+++ b/src/main/java/moe/nea/firmament/mixins/custommodels/TestForFirmamentOverridePredicatesPatch.java
@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins.custommodels;
+
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+import com.llamalad7.mixinextras.sugar.Local;
+import moe.nea.firmament.features.texturepack.BakedOverrideData;
+import moe.nea.firmament.features.texturepack.FirmamentModelPredicate;
+import moe.nea.firmament.features.texturepack.ModelOverrideData;
+import net.minecraft.client.render.model.json.ModelOverride;
+import net.minecraft.client.render.model.json.ModelOverrideList;
+import net.minecraft.item.ItemStack;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+@Mixin(ModelOverrideList.class)
+public class TestForFirmamentOverridePredicatesPatch {
+
+    @ModifyArg(method = "<init>(Lnet/minecraft/client/render/model/Baker;Lnet/minecraft/client/render/model/json/JsonUnbakedModel;Ljava/util/List;)V",
+        at = @At(
+            value = "INVOKE", target = "Ljava/util/List;add(Ljava/lang/Object;)Z"
+        ))
+    public Object onInit(
+        Object element,
+        @Local ModelOverride modelOverride
+    ) {
+        var bakedOverride = (ModelOverrideList.BakedOverride) element;
+        ((BakedOverrideData) bakedOverride)
+            .setFirmamentOverrides(((ModelOverrideData) modelOverride).getFirmamentOverrides());
+        return element;
+    }
+
+    @ModifyExpressionValue(method = "apply", at = @At(value = "INVOKE", target = "Lnet/minecraft/client/render/model/json/ModelOverrideList$BakedOverride;test([F)Z"))
+    public boolean testFirmamentOverrides(boolean originalValue,
+                                          @Local ModelOverrideList.BakedOverride bakedOverride,
+                                          @Local ItemStack stack) {
+        if (!originalValue) return false;
+        var overrideData = (BakedOverrideData) bakedOverride;
+        var overrides = overrideData.getFirmamentOverrides();
+        if (overrides == null) return true;
+        for (FirmamentModelPredicate firmamentOverride : overrides) {
+            if (!firmamentOverride.test(stack))
+                return false;
+        }
+        return true;
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/events/FeaturesInitializedEvent.kt b/src/main/kotlin/moe/nea/firmament/events/FeaturesInitializedEvent.kt
new file mode 100644
index 0000000..da18568
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/events/FeaturesInitializedEvent.kt
@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.events
+
+import moe.nea.firmament.features.FirmamentFeature
+
+data class FeaturesInitializedEvent(val features: List<FirmamentFeature>) : FirmamentEvent() {
+    companion object : FirmamentEventBus<FeaturesInitializedEvent>()
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt b/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
index 99f84e6..5e7f612 100644
--- a/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/FeatureManager.kt
@@ -1,5 +1,6 @@
 /*
  * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -9,6 +10,7 @@ package moe.nea.firmament.features
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.serializer
 import moe.nea.firmament.Firmament
+import moe.nea.firmament.events.FeaturesInitializedEvent
 import moe.nea.firmament.features.chat.AutoCompletions
 import moe.nea.firmament.features.chat.ChatLinks
 import moe.nea.firmament.features.chat.QuickCommands
@@ -76,6 +78,7 @@ object FeatureManager : DataHolder<FeatureManager.Config>(serializer(), "feature
                 loadFeature(DebugView)
             }
             allFeatures.forEach { it.config }
+            FeaturesInitializedEvent.publish(FeaturesInitializedEvent(allFeatures.toList()))
             hasAutoloaded = true
         }
     }
diff --git a/src/main/kotlin/moe/nea/firmament/features/notifications/Notifications.kt b/src/main/kotlin/moe/nea/firmament/features/notifications/Notifications.kt
new file mode 100644
index 0000000..1f3a572
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/notifications/Notifications.kt
@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.notifications
+
+import moe.nea.firmament.features.FirmamentFeature
+
+object Notifications  {
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/AndPredicate.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/AndPredicate.kt
new file mode 100644
index 0000000..5ad023e
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/AndPredicate.kt
@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonArray
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import net.minecraft.item.ItemStack
+
+class AndPredicate(val children: Array<FirmamentModelPredicate>) : FirmamentModelPredicate {
+    override fun test(stack: ItemStack): Boolean {
+        return children.all { it.test(stack) }
+    }
+
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            val children =
+                (jsonElement as JsonArray)
+                    .flatMap {
+                        CustomModelOverrideParser.parsePredicates(it as JsonObject)
+                    }
+                    .toTypedArray()
+            return AndPredicate(children)
+        }
+
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/BakedOverrideData.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/BakedOverrideData.kt
new file mode 100644
index 0000000..8ed8402
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/BakedOverrideData.kt
@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+interface BakedOverrideData {
+    fun getFirmamentOverrides(): Array<FirmamentModelPredicate>?
+    fun setFirmamentOverrides(overrides: Array<FirmamentModelPredicate>?)
+
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomModelOverrideParser.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomModelOverrideParser.kt
new file mode 100644
index 0000000..ac62eaa
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomModelOverrideParser.kt
@@ -0,0 +1,48 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonObject
+import net.minecraft.util.Identifier
+
+object CustomModelOverrideParser {
+
+    val predicateParsers = mutableMapOf<Identifier, FirmamentModelPredicateParser>()
+
+
+    fun registerPredicateParser(name: String, parser: FirmamentModelPredicateParser) {
+        predicateParsers[Identifier("firmament", name)] = parser
+    }
+
+    init {
+        registerPredicateParser("display_name", DisplayNamePredicate.Parser)
+        registerPredicateParser("lore", LorePredicate.Parser)
+        registerPredicateParser("all", AndPredicate.Parser)
+        registerPredicateParser("any", OrPredicate.Parser)
+    }
+
+    fun parsePredicates(predicates: JsonObject): List<FirmamentModelPredicate> {
+        val parsedPredicates = mutableListOf<FirmamentModelPredicate>()
+        for (predicateName in predicates.keySet()) {
+            if (!predicateName.startsWith("firmament:")) continue
+            val identifier = Identifier(predicateName)
+            val parser = predicateParsers[identifier] ?: continue
+            val parsedPredicate = parser.parse(predicates[predicateName])
+            parsedPredicates.add(parsedPredicate)
+        }
+        return parsedPredicates
+    }
+
+    @JvmStatic
+    fun parseCustomModelOverrides(jsonObject: JsonObject): Array<FirmamentModelPredicate>? {
+        val predicates = (jsonObject["predicate"] as? JsonObject) ?: return null
+        val parsedPredicates = parsePredicates(predicates)
+        if (parsedPredicates.isEmpty())
+            return null
+        return parsedPredicates.toTypedArray()
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
index 64dec99..66c0036 100644
--- a/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/CustomSkyBlockTextures.kt
@@ -13,7 +13,6 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable
 import net.minecraft.block.SkullBlock
 import net.minecraft.client.MinecraftClient
 import net.minecraft.client.render.RenderLayer
-import net.minecraft.client.texture.PlayerSkinProvider
 import net.minecraft.client.util.ModelIdentifier
 import net.minecraft.util.Identifier
 import moe.nea.firmament.events.CustomItemModelEvent
@@ -33,6 +32,7 @@ object CustomSkyBlockTextures : FirmamentFeature {
         val enabled by toggle("enabled") { true }
         val skullsEnabled by toggle("skulls-enabled") { true }
         val cacheDuration by integer("cache-duration", 0, 20) { 1 }
+        val enableModelOverrides by toggle("model-overrides") { true }
     }
 
     override val config: ManagedConfig
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/DisplayNamePredicate.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/DisplayNamePredicate.kt
new file mode 100644
index 0000000..373910a
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/DisplayNamePredicate.kt
@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+import net.minecraft.item.ItemStack
+import net.minecraft.nbt.NbtElement
+import net.minecraft.nbt.NbtString
+
+data class DisplayNamePredicate(val stringMatcher: StringMatcher) : FirmamentModelPredicate {
+    override fun test(stack: ItemStack): Boolean {
+        val display = stack.getOrCreateSubNbt(ItemStack.DISPLAY_KEY)
+        return if (display.contains(ItemStack.NAME_KEY, NbtElement.STRING_TYPE.toInt()))
+            stringMatcher.matches(display.get(ItemStack.NAME_KEY) as NbtString)
+        else
+            false
+    }
+
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            return DisplayNamePredicate(StringMatcher.parse(jsonElement))
+        }
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicate.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicate.kt
new file mode 100644
index 0000000..8dcdaf3
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicate.kt
@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import net.minecraft.item.ItemStack
+
+interface FirmamentModelPredicate {
+    fun test(stack: ItemStack): Boolean
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicateParser.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicateParser.kt
new file mode 100644
index 0000000..de7557a
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/FirmamentModelPredicateParser.kt
@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+
+interface FirmamentModelPredicateParser {
+    fun parse(jsonElement: JsonElement): FirmamentModelPredicate
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/LorePredicate.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/LorePredicate.kt
new file mode 100644
index 0000000..604d29c
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/LorePredicate.kt
@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+import net.minecraft.item.ItemStack
+import net.minecraft.nbt.NbtElement
+import net.minecraft.nbt.NbtString
+
+class LorePredicate(val matcher: StringMatcher) : FirmamentModelPredicate {
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            return LorePredicate(StringMatcher.parse(jsonElement))
+        }
+    }
+
+    override fun test(stack: ItemStack): Boolean {
+        val display = stack.getOrCreateSubNbt(ItemStack.DISPLAY_KEY)
+        if (!display.contains(ItemStack.LORE_KEY, NbtElement.LIST_TYPE.toInt()))
+            return false
+        val lore = display.getList(ItemStack.LORE_KEY, NbtElement.STRING_TYPE.toInt())
+        return lore.any { matcher.matches(it as NbtString)}
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideData.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideData.kt
new file mode 100644
index 0000000..ff68c94
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideData.kt
@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+interface ModelOverrideData {
+    fun getFirmamentOverrides(): Array<FirmamentModelPredicate>?
+    fun setFirmamentOverrides(overrides: Array<FirmamentModelPredicate>?)
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideFilterSet.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideFilterSet.kt
new file mode 100644
index 0000000..c8cacbd
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/ModelOverrideFilterSet.kt
@@ -0,0 +1,24 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+import moe.nea.firmament.util.filter.IteratorFilterSet
+
+class ModelOverrideFilterSet(original: java.util.Set<Map.Entry<String, JsonElement>>) :
+    IteratorFilterSet<Map.Entry<String, JsonElement>>(original) {
+    companion object {
+        @JvmStatic
+        fun createFilterSet(set: java.util.Set<*>): java.util.Set<*> {
+            return ModelOverrideFilterSet(set as java.util.Set<Map.Entry<String, JsonElement>>) as java.util.Set<*>
+        }
+    }
+
+    override fun shouldKeepElement(element: Map.Entry<String, JsonElement>): Boolean {
+        return !element.key.startsWith("firmament:")
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/OrPredicate.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/OrPredicate.kt
new file mode 100644
index 0000000..c171367
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/OrPredicate.kt
@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonArray
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import net.minecraft.item.ItemStack
+
+class OrPredicate(val children: Array<FirmamentModelPredicate>) : FirmamentModelPredicate {
+    override fun test(stack: ItemStack): Boolean {
+        return children.any { it.test(stack) }
+    }
+
+    object Parser : FirmamentModelPredicateParser {
+        override fun parse(jsonElement: JsonElement): FirmamentModelPredicate {
+            val children =
+                (jsonElement as JsonArray)
+                    .flatMap {
+                        CustomModelOverrideParser.parsePredicates(it as JsonObject)
+                    }
+                    .toTypedArray()
+            return AndPredicate(children)
+        }
+
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/features/texturepack/StringMatcher.kt b/src/main/kotlin/moe/nea/firmament/features/texturepack/StringMatcher.kt
new file mode 100644
index 0000000..0fb8e00
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/features/texturepack/StringMatcher.kt
@@ -0,0 +1,70 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.features.texturepack
+
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import com.google.gson.JsonPrimitive
+import java.util.function.Predicate
+import net.minecraft.nbt.NbtString
+import net.minecraft.text.Text
+import moe.nea.firmament.util.removeColorCodes
+
+interface StringMatcher {
+    fun matches(string: String): Boolean
+    fun matches(text: Text): Boolean {
+        return matches(text.string)
+    }
+
+    fun matches(nbt: NbtString): Boolean {
+        val string = nbt.asString()
+        val jsonStart = string.indexOf('{')
+        val stringStart = string.indexOf('"')
+        val isString = stringStart >= 0 && string.subSequence(0, stringStart).isBlank()
+        val isJson = jsonStart >= 0 && string.subSequence(0, jsonStart).isBlank()
+        if (isString || isJson)
+            return matches(Text.Serialization.fromJson(string) ?: return false)
+        return matches(string)
+    }
+
+    class Equals(input: String, val stripColorCodes: Boolean) : StringMatcher {
+        private val expected = if (stripColorCodes) input.removeColorCodes() else input
+        override fun matches(string: String): Boolean {
+            return expected == (if (stripColorCodes) string.removeColorCodes() else string)
+        }
+    }
+
+    class Pattern(patternWithColorCodes: String, val stripColorCodes: Boolean) : StringMatcher {
+        private val regex: Predicate<String> = patternWithColorCodes.toPattern().asMatchPredicate()
+        override fun matches(string: String): Boolean {
+            return regex.test(if (stripColorCodes) string.removeColorCodes() else string)
+        }
+    }
+
+    companion object {
+        fun parse(jsonElement: JsonElement): StringMatcher {
+            if (jsonElement is JsonPrimitive) {
+                return Equals(jsonElement.asString, true)
+            }
+            if (jsonElement is JsonObject) {
+                val regex = jsonElement["regex"] as JsonPrimitive?
+                val text = jsonElement["text"] as JsonPrimitive?
+                val shouldStripColor = when (val color = (jsonElement["color"] as JsonPrimitive?)?.asString) {
+                    "preserve" -> false
+                    "strip", null -> true
+                    else -> error("Unknown color preservation mode: $color")
+                }
+                if ((regex == null) == (text == null)) error("Could not parse $jsonElement as string matcher")
+                if (regex != null)
+                    return Pattern(regex.asString, shouldStripColor)
+                if (text != null)
+                    return Equals(text.asString, shouldStripColor)
+            }
+            error("Could not parse $jsonElement as a string matcher")
+        }
+    }
+}
diff --git a/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt b/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt
new file mode 100644
index 0000000..61d6524
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/util/filter/IteratorFilterSet.kt
@@ -0,0 +1,38 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.util.filter
+
+abstract class IteratorFilterSet<K>(val original: java.util.Set<K>) : java.util.Set<K> by original {
+    abstract fun shouldKeepElement(element: K): Boolean
+
+    override fun iterator(): MutableIterator<K> {
+        val parentIterator = original.iterator()
+        return object : MutableIterator<K> {
+            var lastEntry: K? = null
+            override fun hasNext(): Boolean {
+                while (lastEntry == null) {
+                    if (!parentIterator.hasNext())
+                        break
+                    val element = parentIterator.next()
+                    if (!shouldKeepElement(element)) continue
+                    lastEntry = element
+                }
+                return lastEntry != null
+            }
+
+            override fun next(): K {
+                if (!hasNext()) throw NoSuchElementException()
+                return lastEntry ?: throw NoSuchElementException()
+            }
+
+            override fun remove() {
+                TODO("Not yet implemented")
+            }
+        }
+    }
+}
+
diff --git a/src/main/kotlin/moe/nea/firmament/util/textutil.kt b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
index f811bd8..1d61332 100644
--- a/src/main/kotlin/moe/nea/firmament/util/textutil.kt
+++ b/src/main/kotlin/moe/nea/firmament/util/textutil.kt
@@ -1,5 +1,6 @@
 /*
  * SPDX-FileCopyrightText: 2023 Linnea Gräf <nea@nea.moe>
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
  *
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
@@ -69,9 +70,30 @@ class TextMatcher(text: Text) {
     }
 }
 
+val formattingChars = "kmolnrKMOLNR".toSet()
+fun CharSequence.removeColorCodes(keepNonColorCodes: Boolean = false): String {
+    var nextParagraph = indexOf('§')
+    if (nextParagraph < 0) return this.toString()
+    val stringBuffer = StringBuilder(this.length)
+    var readIndex = 0
+    while (nextParagraph >= 0) {
+        stringBuffer.append(this, readIndex, nextParagraph)
+        if (keepNonColorCodes && nextParagraph + 1 < length && this[nextParagraph + 1] in formattingChars) {
+            readIndex = nextParagraph
+            nextParagraph = indexOf('§', startIndex = readIndex + 1)
+        } else {
+            readIndex = nextParagraph + 2
+            nextParagraph = indexOf('§', startIndex = readIndex)
+        }
+        if (readIndex > this.length)
+            readIndex = this.length
+    }
+    stringBuffer.append(this, readIndex, this.length)
+    return stringBuffer.toString()
+}
 
-val Text.unformattedString
-    get() = string.replace("§.".toRegex(), "")
+val Text.unformattedString: String
+    get() = string.removeColorCodes().toString()
 
 
 fun Text.transformEachRecursively(function: (Text) -> Text): Text {
diff --git a/src/main/resources/firmament.accesswidener b/src/main/resources/firmament.accesswidener
index 9f1b44b..92f4fe4 100644
--- a/src/main/resources/firmament.accesswidener
+++ b/src/main/resources/firmament.accesswidener
@@ -8,3 +8,5 @@ accessible method net/minecraft/client/render/model/ModelLoader$BakerImpl <init>
 accessible field net/minecraft/client/network/ClientPlayNetworkHandler lastSeenMessagesCollector Lnet/minecraft/network/message/LastSeenMessagesCollector;
 accessible field net/minecraft/client/gui/hud/InGameHud SCOREBOARD_ENTRY_COMPARATOR Ljava/util/Comparator;
 
+accessible class net/minecraft/client/render/model/json/ModelOverride$Deserializer
+accessible class net/minecraft/client/render/model/json/ModelOverrideList$BakedOverride
diff --git a/src/test/kotlin/moe/nea/firmament/test/ColorCode.kt b/src/test/kotlin/moe/nea/firmament/test/ColorCode.kt
new file mode 100644
index 0000000..737534e
--- /dev/null
+++ b/src/test/kotlin/moe/nea/firmament/test/ColorCode.kt
@@ -0,0 +1,28 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.test
+
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Test
+import moe.nea.firmament.util.removeColorCodes
+
+
+class ColorCode {
+    @Test
+    fun testWhatever() {
+        Assertions.assertEquals("", "".removeColorCodes().toString())
+        Assertions.assertEquals("", "§".removeColorCodes().toString())
+        Assertions.assertEquals("", "§a".removeColorCodes().toString())
+        Assertions.assertEquals("ab", "a§ab".removeColorCodes().toString())
+        Assertions.assertEquals("ab", "a§ab§§".removeColorCodes().toString())
+        Assertions.assertEquals("abc", "a§ab§§c".removeColorCodes().toString())
+        Assertions.assertEquals("bc", "§ab§§c".removeColorCodes().toString())
+        Assertions.assertEquals("b§lc", "§ab§l§§c".removeColorCodes(true).toString())
+        Assertions.assertEquals("b§lc§l", "§ab§l§§c§l".removeColorCodes(true).toString())
+        Assertions.assertEquals("§lb§lc", "§l§ab§l§§c".removeColorCodes(true).toString())
+    }
+}