feat(controller): add inline remap modal with descriptor-based bindings (#21)

src/main/controller-config-update.ts

@@ -0,0 +1,38 @@
+import type { ControllerConfigUpdate, RawConfig } from '../types';
+
+type RawControllerConfig = NonNullable<RawConfig['controller']>;
+type RawControllerBindings = NonNullable<RawControllerConfig['bindings']>;
+
+export function applyControllerConfigUpdate(
+  currentController: RawConfig['controller'] | undefined,
+  update: ControllerConfigUpdate,
+): RawControllerConfig {
+  const nextController: RawControllerConfig = {
+    ...(currentController ?? {}),
+    ...update,
+  };
+
+  if (currentController?.buttonIndices || update.buttonIndices) {
+    nextController.buttonIndices = {
+      ...(currentController?.buttonIndices ?? {}),
+      ...(update.buttonIndices ?? {}),
+    };
+  }
+
+  if (currentController?.bindings || update.bindings) {
+    const nextBindings: RawControllerBindings = {
+      ...(currentController?.bindings ?? {}),
+    };
+
+    for (const [key, value] of Object.entries(update.bindings ?? {}) as Array<
+      [keyof RawControllerBindings, RawControllerBindings[keyof RawControllerBindings] | undefined]
+    >) {
+      if (value === undefined) continue;
+      (nextBindings as Record<string, unknown>)[key] = JSON.parse(JSON.stringify(value));
+    }
+
+    nextController.bindings = nextBindings;
+  }
+
+  return nextController;
+}