refactor: nodes as builder pattern

frontend/src/components/nodes/function/descriptor.tsx

@@ -0,0 +1,27 @@
+import React from 'react'
+import { Code2 } from 'lucide-react'
+import { createNodeTypeBuilder } from '@/lib/nodeTypeBuilder'
+import { NODE_HELP } from '@/lib/nodeHelp'
+import type { NodeTypeDescriptor } from '@/lib/nodeRegistry'
+import FunctionNode from './FunctionNode'
+
+const ICON_CLASS = 'mr-2 h-4 w-4'
+
+const DEFAULT_BODY = `function(num, kwargs) {
+  return num + (kwargs.bar || 0);
+}`
+
+export function getFunctionNodeDescriptor(): NodeTypeDescriptor {
+  return createNodeTypeBuilder('function', FunctionNode, { width: 288, height: 260 }, { body: DEFAULT_BODY })
+    .idPrefix('fn_')
+    .withInputOutput(true, true)
+    .classification('psyche')
+    .allowedSourceTypes(['config', 'variable', 'function'])
+    .allowedTargetTypes(['config', 'function'])
+    .help(NODE_HELP.function)
+    .menu('Function', <Code2 className={ICON_CLASS} />)
+    .getResetData(() => ({ body: '' }))
+    .connectionLabel('adding input')
+    .withFullscreen()
+    .build()
+}