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fix: robust JSON parsing in Iteration node #4603

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fix: robust JSON parsing in Iteration node #4603

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20 changes: 16 additions & 4 deletions packages/components/nodes/agentflow/Iteration/Iteration.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
import { handleEscapeCharacters } from '../../../src/utils'

class Iteration_Agentflow implements INode {
label: string
Expand Down Expand Up @@ -40,11 +41,22 @@ class Iteration_Agentflow implements INode {

// Helper function to clean JSON strings with redundant backslashes
const cleanJsonString = (str: string): string => {
return str.replace(/\\(["'[\]{}])/g, '$1')
return str.replace(/\\(["'\[\]{}])/g, '$1')
}

const iterationInputArray =
typeof iterationInput === 'string' && iterationInput !== '' ? JSON.parse(cleanJsonString(iterationInput)) : iterationInput
// Try robust parsing using handleEscapeCharacters
let iterationInputArray
if (typeof iterationInput === 'string' && iterationInput !== '') {
let cleaned = cleanJsonString(iterationInput)
try {
iterationInputArray = JSON.parse(handleEscapeCharacters(cleaned, true))
} catch (e) {
// fallback to previous logic if parsing fails
iterationInputArray = JSON.parse(cleaned)
}
} else {
iterationInputArray = iterationInput
}

if (!iterationInputArray || !Array.isArray(iterationInputArray)) {
throw new Error('Invalid input array')
Expand All @@ -66,4 +78,4 @@ class Iteration_Agentflow implements INode {
}
}

module.exports = { nodeClass: Iteration_Agentflow }
export const nodeClass = Iteration_Agentflow;