IO-3515 Additional packages and initial route &n simple queue polling.
This commit is contained in:
Patrick Fic
404
server/ai/bill-ocr/bill-ocr.js
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404
server/ai/bill-ocr/bill-ocr.js
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const { TextractClient, StartExpenseAnalysisCommand, GetExpenseAnalysisCommand } = require("@aws-sdk/client-textract");
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const { S3Client, PutObjectCommand } = require("@aws-sdk/client-s3");
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const { SQSClient, ReceiveMessageCommand, DeleteMessageCommand } = require("@aws-sdk/client-sqs");
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const { v4: uuidv4 } = require('uuid');
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// Initialize AWS clients
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const awsConfig = {
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region: process.env.AWS_AI_REGION || "ca-central-1",
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credentials: {
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accessKeyId: process.env.AWS_AI_ACCESS_KEY_ID,
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secretAccessKey: process.env.AWS_AI_SECRET_ACCESS_KEY,
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}
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};
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const textractClient = new TextractClient(awsConfig);
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const s3Client = new S3Client(awsConfig);
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const sqsClient = new SQSClient(awsConfig);
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// In-memory job storage (consider using Redis or a database for production)
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const jobStore = new Map();
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async function handleBillOcr(request, response) {
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// Check if file was uploaded
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if (!request.file) {
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response.status(400).send({ error: 'No file uploaded' });
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return;
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}
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// The uploaded file is available in request.file
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const uploadedFile = request.file;
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try {
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// Start the Textract job (non-blocking)
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const jobInfo = await startTextractJob(uploadedFile.buffer);
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response.status(202).send({
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success: true,
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jobId: jobInfo.jobId,
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message: 'Invoice processing started',
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statusUrl: `/api/bill-ocr/status/${jobInfo.jobId}`
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});
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} catch (error) {
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console.error('Error starting invoice processing:', error);
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response.status(500).send({
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error: 'Failed to start invoice processing',
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message: error.message
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});
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}
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}
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async function handleBillOcrStatus(request, response) {
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console.log('handleBillOcrStatus called');
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console.log('request.params:', request.params);
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console.log('request.query:', request.query);
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const { jobId } = request.params;
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if (!jobId) {
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console.log('No jobId found in params');
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response.status(400).send({ error: 'Job ID is required' });
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return;
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}
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console.log('Looking for job:', jobId);
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const jobStatus = jobStore.get(jobId);
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console.log('Job status:', jobStatus);
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if (!jobStatus) {
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response.status(404).send({ error: 'Job not found' });
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return;
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}
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if (jobStatus.status === 'COMPLETED') {
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response.status(200).send({
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status: 'COMPLETED',
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data: jobStatus.data
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});
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} else if (jobStatus.status === 'FAILED') {
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response.status(500).send({
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status: 'FAILED',
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error: jobStatus.error
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});
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} else {
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response.status(200).send({
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status: jobStatus.status
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});
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}
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}
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async function startTextractJob(pdfBuffer) {
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// Upload PDF to S3 temporarily for Textract async processing
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const s3Bucket = process.env.AWS_AI_BUCKET;
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const snsTopicArn = process.env.AWS_TEXTRACT_SNS_TOPIC_ARN;
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const snsRoleArn = process.env.AWS_TEXTRACT_SNS_ROLE_ARN;
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if (!s3Bucket) {
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throw new Error('AWS_AI_BUCKET environment variable is required');
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}
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if (!snsTopicArn) {
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throw new Error('AWS_TEXTRACT_SNS_TOPIC_ARN environment variable is required');
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}
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if (!snsRoleArn) {
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throw new Error('AWS_TEXTRACT_SNS_ROLE_ARN environment variable is required');
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}
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const jobId = uuidv4();
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const s3Key = `textract-temp/${jobId}.pdf`;
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// Upload to S3
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const uploadCommand = new PutObjectCommand({
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Bucket: s3Bucket,
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Key: s3Key,
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Body: pdfBuffer,
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ContentType: 'application/pdf'
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});
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await s3Client.send(uploadCommand);
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// Start async Textract expense analysis with SNS notification
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const startCommand = new StartExpenseAnalysisCommand({
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DocumentLocation: {
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S3Object: {
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Bucket: s3Bucket,
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Name: s3Key
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}
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},
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OutputConfig: {
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S3Bucket: s3Bucket,
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S3Prefix: `textract-output/${jobId}/`
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},
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NotificationChannel: {
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SNSTopicArn: snsTopicArn,
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RoleArn: snsRoleArn
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},
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ClientRequestToken: jobId
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});
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const startResult = await textractClient.send(startCommand);
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// Store job info
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jobStore.set(jobId, {
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status: 'IN_PROGRESS',
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textractJobId: startResult.JobId,
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s3Key: s3Key,
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startedAt: new Date().toISOString()
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});
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return {
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jobId: jobId,
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textractJobId: startResult.JobId
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};
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}
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// Process SQS messages from Textract completion notifications
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async function processSQSMessages() {
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const queueUrl = process.env.AWS_TEXTRACT_SQS_QUEUE_URL;
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if (!queueUrl) {
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console.error('AWS_TEXTRACT_SQS_QUEUE_URL not configured');
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return;
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}
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try {
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console.log('Polling SQS queue:', queueUrl);
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const receiveCommand = new ReceiveMessageCommand({
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QueueUrl: queueUrl,
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MaxNumberOfMessages: 10,
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WaitTimeSeconds: 20,
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MessageAttributeNames: ['All']
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});
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const result = await sqsClient.send(receiveCommand);
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console.log('SQS poll result:', result.Messages ? `${result.Messages.length} messages` : 'no messages');
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if (result.Messages && result.Messages.length > 0) {
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console.log('Processing', result.Messages.length, 'messages from SQS');
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for (const message of result.Messages) {
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try {
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console.log("Processing message:", message);
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await handleTextractNotification(message);
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// Delete message after successful processing
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const deleteCommand = new DeleteMessageCommand({
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QueueUrl: queueUrl,
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ReceiptHandle: message.ReceiptHandle
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});
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await sqsClient.send(deleteCommand);
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} catch (error) {
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console.error('Error processing message:', error);
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}
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}
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}
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} catch (error) {
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console.error('Error receiving SQS messages:', error);
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}
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}
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async function handleTextractNotification(message) {
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const body = JSON.parse(message.Body);
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const snsMessage = JSON.parse(body.Message);
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const textractJobId = snsMessage.JobId;
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const status = snsMessage.Status;
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// Find our job by Textract job ID
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let ourJobId = null;
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for (const [key, value] of jobStore.entries()) {
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if (value.textractJobId === textractJobId) {
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ourJobId = key;
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break;
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}
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}
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if (!ourJobId) {
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console.warn(`Job not found for Textract job ID: ${textractJobId}`);
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return;
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}
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const jobInfo = jobStore.get(ourJobId);
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if (status === 'SUCCEEDED') {
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// Retrieve the results
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const invoiceData = await retrieveTextractResults(textractJobId);
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const processedData = processScanData(invoiceData);
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jobStore.set(ourJobId, {
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...jobInfo,
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status: 'COMPLETED',
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data: processedData,
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completedAt: new Date().toISOString()
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});
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} else if (status === 'FAILED') {
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jobStore.set(ourJobId, {
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...jobInfo,
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status: 'FAILED',
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error: snsMessage.StatusMessage || 'Textract job failed',
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completedAt: new Date().toISOString()
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});
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}
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}
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async function retrieveTextractResults(textractJobId) {
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// Handle pagination if there are multiple pages of results
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let allExpenseDocuments = [];
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let nextToken = null;
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do {
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const getCommand = new GetExpenseAnalysisCommand({
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JobId: textractJobId,
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NextToken: nextToken
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});
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const result = await textractClient.send(getCommand);
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if (result.ExpenseDocuments) {
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allExpenseDocuments = allExpenseDocuments.concat(result.ExpenseDocuments);
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}
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nextToken = result.NextToken;
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} while (nextToken);
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// Extract invoice data from Textract response
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return extractInvoiceData({ ExpenseDocuments: allExpenseDocuments });
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}
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// Start SQS polling (call this when server starts)
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function startSQSPolling() {
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const pollInterval = setInterval(() => {
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processSQSMessages().catch(error => {
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console.error('SQS polling error:', error);
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});
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}, 5000); // Poll every 5 seconds
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return pollInterval;
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}
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function extractInvoiceData(textractResponse) {
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const invoiceData = {
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summary: {},
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lineItems: []
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};
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if (!textractResponse.ExpenseDocuments || textractResponse.ExpenseDocuments.length === 0) {
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return invoiceData;
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}
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// Process each page of the invoice
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textractResponse.ExpenseDocuments.forEach(expenseDoc => {
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// Extract summary fields (vendor, invoice number, date, total, etc.)
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if (expenseDoc.SummaryFields) {
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expenseDoc.SummaryFields.forEach(field => {
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const fieldType = field.Type?.Text || '';
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const fieldValue = field.ValueDetection?.Text || '';
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const confidence = field.ValueDetection?.Confidence || 0;
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// Map common invoice fields
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if (fieldType && fieldValue) {
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invoiceData.summary[fieldType] = {
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value: fieldValue,
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confidence: confidence
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};
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}
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});
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}
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// Extract line items
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if (expenseDoc.LineItemGroups) {
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expenseDoc.LineItemGroups.forEach(lineItemGroup => {
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if (lineItemGroup.LineItems) {
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lineItemGroup.LineItems.forEach(lineItem => {
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const item = {};
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if (lineItem.LineItemExpenseFields) {
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lineItem.LineItemExpenseFields.forEach(field => {
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const fieldType = field.Type?.Text || '';
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const fieldValue = field.ValueDetection?.Text || '';
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const confidence = field.ValueDetection?.Confidence || 0;
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if (fieldType && fieldValue) {
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// Normalize field names
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const normalizedField = normalizeFieldName(fieldType);
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item[normalizedField] = {
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value: fieldValue,
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confidence: confidence
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};
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}
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});
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}
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if (Object.keys(item).length > 0) {
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invoiceData.lineItems.push(item);
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}
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});
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}
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});
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}
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});
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return invoiceData;
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}
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function normalizeFieldName(fieldType) {
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// Convert Textract field types to more readable names
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const fieldMap = {
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'ITEM': 'description',
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'QUANTITY': 'quantity',
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'UNIT_PRICE': 'unitPrice',
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'PRICE': 'price',
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'PRODUCT_CODE': 'productCode',
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'EXPENSE_ROW': 'row'
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};
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return fieldMap[fieldType] || fieldType.toLowerCase().replace(/_/g, '');
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}
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function processScanData(invoiceData) {
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// Process and clean the extracted data
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const processed = {
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summary: {},
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lineItems: []
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};
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// Clean summary fields
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for (const [key, value] of Object.entries(invoiceData.summary)) {
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if (value.confidence > 50) { // Only include fields with > 50% confidence
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processed.summary[key] = value.value;
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}
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}
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// Process line items
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processed.lineItems = invoiceData.lineItems
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.map(item => {
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const processedItem = {};
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for (const [key, value] of Object.entries(item)) {
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if (value.confidence > 50) { // Only include fields with > 50% confidence
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let cleanValue = value.value;
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// Parse numbers for quantity and price fields
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if (key === 'quantity') {
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cleanValue = parseFloat(cleanValue) || 0;
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} else if (key === 'unitPrice' || key === 'price') {
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// Remove currency symbols and parse
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cleanValue = parseFloat(cleanValue.replace(/[^0-9.-]/g, '')) || 0;
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}
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processedItem[key] = cleanValue;
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}
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}
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return processedItem;
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})
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.filter(item => {
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// Filter out items with no description or with quantity <= 0
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return item.description && (!item.quantity || item.quantity > 0);
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});
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return processed;
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}
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module.exports = {
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handleBillOcr,
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handleBillOcrStatus,
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startSQSPolling
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};
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