n8n/packages/nodes-base/nodes/Aws/Textract/AwsTextract.node.ts

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import {
IExecuteFunctions,
} from 'n8n-core';
import {
IBinaryKeyData,
ICredentialDataDecryptedObject,
ICredentialsDecrypted,
ICredentialTestFunctions,
IDataObject,
INodeExecutionData,
INodeType,
INodeTypeDescription,
NodeCredentialTestResult,
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<NodeCredentialTestResult> {
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<INodeExecutionData[][]> {
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)];
}
}