Feature/newnew workflow loop node (#14863)

Co-authored-by: arkunzz <4873204@qq.com>

web/app/components/workflow/nodes/loop/use-is-var-file-attribute.ts

@@ -0,0 +1,35 @@
+import { useMemo } from 'react'
+import { useIsChatMode, useWorkflow, useWorkflowVariables } from '../../hooks'
+import type { ValueSelector } from '../../types'
+import { VarType } from '../../types'
+
+type Params = {
+  nodeId: string
+}
+const useIsVarFileAttribute = ({
+  nodeId,
+}: Params) => {
+  const isChatMode = useIsChatMode()
+  const { getBeforeNodesInSameBranch } = useWorkflow()
+  const availableNodes = useMemo(() => {
+    return getBeforeNodesInSameBranch(nodeId)
+  }, [getBeforeNodesInSameBranch, nodeId])
+  const { getCurrentVariableType } = useWorkflowVariables()
+  const getIsVarFileAttribute = (variable: ValueSelector) => {
+    if (variable.length !== 3)
+      return false
+    const parentVariable = variable.slice(0, 2)
+    const varType = getCurrentVariableType({
+      valueSelector: parentVariable,
+      availableNodes,
+      isChatMode,
+      isConstant: false,
+    })
+    return varType === VarType.file
+  }
+  return {
+    getIsVarFileAttribute,
+  }
+}
+
+export default useIsVarFileAttribute