[feature] Add text and PDF file upload support

src/extensions/core/uploadText.ts

@@ -0,0 +1,50 @@
+import {
+  ComfyNodeDef,
+  InputSpec,
+  isComboInputSpecV1
+} from '@/schemas/nodeDefSchema'
+
+import { app } from '../../scripts/app'
+
+// Adds an upload button to text/pdf nodes
+
+const isTextUploadComboInput = (inputSpec: InputSpec) => {
+  const [inputName, inputOptions] = inputSpec
+  if (!inputOptions) return false
+
+  const isUploadInput = inputOptions['text_upload'] === true
+
+  return (
+    isUploadInput && (isComboInputSpecV1(inputSpec) || inputName === 'COMBO')
+  )
+}
+
+const createUploadInput = (
+  textInputName: string,
+  textInputOptions: InputSpec
+): InputSpec => [
+  'TEXTUPLOAD',
+  {
+    ...textInputOptions[1],
+    textInputName
+  }
+]
+
+app.registerExtension({
+  name: 'Comfy.UploadText',
+  beforeRegisterNodeDef(_nodeType, nodeData: ComfyNodeDef) {
+    const { input } = nodeData ?? {}
+    const { required } = input ?? {}
+    if (!required) return
+
+    const found = Object.entries(required).find(([_, input]) =>
+      isTextUploadComboInput(input)
+    )
+
+    // If text/pdf combo input found, attach upload input
+    if (found) {
+      const [inputName, inputSpec] = found
+      required.upload = createUploadInput(inputName, inputSpec)
+    }
+  }
+})