1 files changed, 64 insertions, 0 deletions
diff --git a/src/client/java/dev/isxander/yacl/api/Binding.java b/src/client/java/dev/isxander/yacl/api/Binding.java
new file mode 100644
index 0000000..91158d3
--- /dev/null
+++ b/src/client/java/dev/isxander/yacl/api/Binding.java
@@ -0,0 +1,64 @@
+package dev.isxander.yacl.api;
+
+import dev.isxander.yacl.impl.GenericBindingImpl;
+import dev.isxander.yacl.mixin.client.SimpleOptionAccessor;
+import net.minecraft.client.option.SimpleOption;
+import org.apache.commons.lang3.Validate;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+/**
+ * Controls modifying the bound option.
+ * Provides the default value, a setter and a getter.
+ */
+public interface Binding<T> {
+    void setValue(T value);
+
+    T getValue();
+
+    T defaultValue();
+
+    /**
+     * Creates a generic binding.
+     *
+     * @param def default value of the option, used to reset
+     * @param getter should return the current value of the option
+     * @param setter should set the option to the supplied value
+     */
+    static <T> Binding<T> generic(T def, Supplier<T> getter, Consumer<T> setter) {
+        Validate.notNull(def, "`def` must not be null");
+        Validate.notNull(getter, "`getter` must not be null");
+        Validate.notNull(setter, "`setter` must not be null");
+
+        return new GenericBindingImpl<>(def, getter, setter);
+    }
+
+    /**
+     * Creates a {@link Binding} for Minecraft's {@link SimpleOption}
+     */
+    static <T> Binding<T> minecraft(SimpleOption<T> minecraftOption) {
+        Validate.notNull(minecraftOption, "`minecraftOption` must not be null");
+
+        return new GenericBindingImpl<>(
+                ((SimpleOptionAccessor<T>) (Object) minecraftOption).getDefaultValue(),
+                minecraftOption::getValue,
+                minecraftOption::setValue
+        );
+    }
+
+    /**
+     * Creates an immutable binding that has no default and cannot be modified.
+     *
+     * @param value the value for the binding
+     */
+    static <T> Binding<T> immutable(T value) {
+        Validate.notNull(value, "`value` must not be null");
+
+        return new GenericBindingImpl<>(
+                value,
+                () -> value,
+                changed -> {}
+        );
+    }
+}