Add EnumValue to possible Feature values

src/main/kotlin/codes/som/hibiscus/api/feature/values/EnumValue.kt

@@ -0,0 +1,35 @@
+package codes.som.hibiscus.api.feature.values
+
+import imgui.ImGui
+import imgui.type.ImInt
+
+class EnumValue<E : Enum<E>>(name: String, value: E) : RegisteredValue<E>(name, value) {
+    override fun convertValueFromString(representation: String): E {
+        return value
+            .javaClass
+            .enumConstants
+            .first { it.name.equals(representation, ignoreCase = true) }
+    }
+
+    override fun drawUIControl() {
+        val selectedValue = ImInt(value.ordinal ?: -1)
+        ImGui.combo(name, selectedValue, value.javaClass.enumConstants.map { it.name }.toTypedArray())
+        value = value.javaClass.enumConstants[selectedValue.get()]
+    }
+}
+
+class OptionalEnumValue<E : Enum<E>>(
+    name: String,
+    private val enumType: Class<E>,
+    value: E?
+) : RegisteredValue<E?>(name, value) {
+    override fun convertValueFromString(representation: String): E {
+        return enumType.enumConstants.first { it.name.equals(representation, ignoreCase = true) }
+    }
+
+    override fun drawUIControl() {
+        val selectedValue = ImInt(value?.ordinal ?: -1)
+        ImGui.combo(name, selectedValue, arrayOf("<none>") + enumType.enumConstants.map { it.name }.toTypedArray())
+        value = enumType.enumConstants.getOrNull(selectedValue.get() - 1)
+    }
+}

src/main/kotlin/codes/som/hibiscus/api/feature/values/ValueRegistry.kt

@@ -26,4 +26,13 @@ class ValueRegistry {
 
     fun float(name: String, default: Float, min: Float = Float.MIN_VALUE, max: Float = Float.MAX_VALUE) =
         FloatValue(name, default, min, max).also(this::register)
+
+    fun <E : Enum<E>> enum(name: String, default: E) =
+        EnumValue(name, default)
+
+    fun <E : Enum<E>> optionalEnum(name: String, type: Class<E>, default: E?) =
+        OptionalEnumValue(name, type, default)
+
+    inline fun <reified E : Enum<E>> optionalEnum(name: String, default: E?) =
+        optionalEnum(name, E::class.java, default)
 }