import { IExecuteFunctions, } from 'n8n-core'; import { IBinaryKeyData, ICredentialDataDecryptedObject, ICredentialsDecrypted, ICredentialTestFunctions, IDataObject, INodeCredentialTestResult, INodeExecutionData, INodeType, INodeTypeDescription, NodeOperationError, } from 'n8n-workflow'; import { awsApiRequestREST, IExpenseDocument, simplify, validateCrendetials, } from './GenericFunctions'; export class AwsTextract implements INodeType { description: INodeTypeDescription = { displayName: 'AWS Textract', name: 'awsTextract', icon: 'file:textract.svg', group: ['output'], version: 1, subtitle: '={{$parameter["operation"]}}', description: 'Sends data to Amazon Textract', defaults: { name: 'AWS Textract', }, inputs: ['main'], outputs: ['main'], credentials: [ { name: 'aws', required: true, testedBy: 'awsTextractApiCredentialTest', }, ], properties: [ { displayName: 'Operation', name: 'operation', type: 'options', options: [ { name: 'Analyze Receipt or Invoice', value: 'analyzeExpense', }, ], default: 'analyzeExpense', description: '', }, { displayName: 'Input Data Field Name', name: 'binaryPropertyName', type: 'string', default: 'data', displayOptions: { show: { operation: [ 'analyzeExpense', ], }, }, required: true, description: 'The name of the input field containing the binary file data to be uploaded. Supported file types: PNG, JPEG', }, { displayName: 'Simplify Response', name: 'simple', type: 'boolean', displayOptions: { show: { operation: [ 'analyzeExpense', ], }, }, default: true, description: 'Return a simplified version of the response instead of the raw data.', }, ], }; methods = { credentialTest: { async awsTextractApiCredentialTest(this: ICredentialTestFunctions, credential: ICredentialsDecrypted): Promise { try { await validateCrendetials.call(this, credential.data as ICredentialDataDecryptedObject, 'sts'); } catch (error) { return { status: 'Error', message: 'The security token included in the request is invalid', }; } return { status: 'OK', message: 'Connection successful!', }; }, }, }; async execute(this: IExecuteFunctions): Promise { const items = this.getInputData(); const returnData: IDataObject[] = []; let responseData; const operation = this.getNodeParameter('operation', 0) as string; for (let i = 0; i < items.length; i++) { try { //https://docs.aws.amazon.com/textract/latest/dg/API_AnalyzeExpense.html if (operation === 'analyzeExpense') { const binaryProperty = this.getNodeParameter('binaryPropertyName', i) as string; const simple = this.getNodeParameter('simple', i) as boolean; if (items[i].binary === undefined) { throw new NodeOperationError(this.getNode(), 'No binary data exists on item!'); } if ((items[i].binary as IBinaryKeyData)[binaryProperty] === undefined) { throw new NodeOperationError(this.getNode(), `No binary data property "${binaryProperty}" does not exists on item!`); } const binaryPropertyData = (items[i].binary as IBinaryKeyData)[binaryProperty]; const body: IDataObject = { Document: { Bytes: binaryPropertyData.data, }, }; const action = 'Textract.AnalyzeExpense'; responseData = await awsApiRequestREST.call(this, 'textract', 'POST', '', JSON.stringify(body), { 'x-amz-target': action, 'Content-Type': 'application/x-amz-json-1.1' }) as IExpenseDocument; if (simple) { responseData = simplify(responseData); } } if (Array.isArray(responseData)) { returnData.push.apply(returnData, responseData as IDataObject[]); } else { returnData.push(responseData as unknown as IDataObject); } } catch (error) { if (this.continueOnFail()) { returnData.push({ error: error.message }); continue; } throw error; } } return [this.helpers.returnJsonArray(returnData)]; } }