465 lines
16 KiB
JavaScript
465 lines
16 KiB
JavaScript
const { TextractClient, StartExpenseAnalysisCommand, GetExpenseAnalysisCommand, AnalyzeExpenseCommand } = 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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const { getTextractJobKey, setTextractJob, getTextractJob, getFileType, getPdfPageCount, hasActiveJobs } = require("./bill-ocr-helpers");
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const { extractInvoiceData, processScanData } = require("./bill-ocr-normalize");
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const { generateBillFormData } = require("./bill-ocr-generator");
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const logger = require("../../utils/logger");
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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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let redisPubClient = null;
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/**
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* Initialize the bill-ocr module with Redis client
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* @param {Object} pubClient - Redis cluster client
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*/
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function initializeBillOcr(pubClient) {
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redisPubClient = pubClient;
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}
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/**
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* Check if job exists by Textract job ID
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* @param {string} textractJobId
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* @returns {Promise<boolean>}
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*/
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async function jobExists(textractJobId) {
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if (!redisPubClient) {
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throw new Error('Redis client not initialized. Call initializeBillOcr first.');
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}
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const key = getTextractJobKey(textractJobId);
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const exists = await redisPubClient.exists(key);
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if (exists) {
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return true;
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}
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return false;
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}
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async function handleBillOcr(req, res) {
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// Check if file was uploaded
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if (!req.file) {
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return res.status(400).send({ error: 'No file uploaded.' });
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}
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// The uploaded file is available in request file
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const uploadedFile = req.file;
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const { jobid, bodyshopid, partsorderid } = req.body;
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logger.log("bill-ocr-start", "DEBUG", req.user.email, jobid, null);
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try {
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const fileType = getFileType(uploadedFile);
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// Images are always processed synchronously (single page)
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if (fileType === 'image') {
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const processedData = await processSinglePageDocument(uploadedFile.buffer);
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const billForm = await generateBillFormData({ processedData: processedData, jobid, bodyshopid, partsorderid, req: req });
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logger.log("bill-ocr-single-complete", "DEBUG", req.user.email, jobid, { ...processedData, billForm });
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return res.status(200).json({
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success: true,
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status: 'COMPLETED',
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data: { ...processedData, billForm },
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message: 'Invoice processing completed'
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});
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} else if (fileType === 'pdf') {
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// Check the number of pages in the PDF
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const pageCount = await getPdfPageCount(uploadedFile.buffer);
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if (pageCount === 1) {
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// Process synchronously for single-page documents
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const processedData = await processSinglePageDocument(uploadedFile.buffer);
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const billForm = await generateBillFormData({ processedData: processedData, jobid, bodyshopid, partsorderid, req: req });
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logger.log("bill-ocr-single-complete", "DEBUG", req.user.email, jobid, { ...processedData, billForm });
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return res.status(200).json({
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success: true,
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status: 'COMPLETED',
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data: { ...processedData, billForm },
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message: 'Invoice processing completed'
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});
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}
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// Start the Textract job (non-blocking) for multi-page documents
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const jobInfo = await startTextractJob(uploadedFile.buffer, { jobid, bodyshopid, partsorderid });
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logger.log("bill-ocr-multipage-start", "DEBUG", req.user.email, jobid, jobInfo);
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return res.status(202).json({
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success: true,
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textractJobId: jobInfo.jobId,
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message: 'Invoice processing started',
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statusUrl: `/ai/bill-ocr/status/${jobInfo.jobId}`
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});
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} else {
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logger.log("bill-ocr-unsupported-filetype", "WARN", req.user.email, jobid, { fileType });
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return res.status(400).json({
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error: 'Unsupported file type',
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message: 'Please upload a PDF or supported image file (JPEG, PNG, TIFF)'
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});
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}
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} catch (error) {
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logger.log("bill-ocr-error", "ERROR", req.user.email, jobid, { error: error.message, stack: error.stack });
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return res.status(500).json({
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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(req, res) {
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const { textractJobId } = req.params;
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if (!textractJobId) {
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logger.log("bill-ocr-status-error", "WARN", req.user.email, null, { error: 'No textractJobId found in params' });
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return res.status(400).json({ error: 'Job ID is required' });
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}
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const jobStatus = await getTextractJob({ redisPubClient, textractJobId });
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if (!jobStatus) {
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return res.status(404).json({ error: 'Job not found' });
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}
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if (jobStatus.status === 'COMPLETED') {
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// Generate billForm on-demand if not already generated
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let billForm = jobStatus.data?.billForm;
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if (!billForm && jobStatus.context) {
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try {
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billForm = await generateBillFormData({
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processedData: jobStatus.data,
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jobid: jobStatus.context.jobid,
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bodyshopid: jobStatus.context.bodyshopid,
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partsorderid: jobStatus.context.partsorderid,
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req: req // Now we have request context!
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});
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logger.log("bill-ocr-multipage-complete", "DEBUG", req.user.email, jobStatus.context.jobid, { ...jobStatus.data, billForm });
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// Cache the billForm back to Redis for future requests
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await setTextractJob({
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redisPubClient,
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textractJobId,
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jobData: {
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...jobStatus,
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data: {
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...jobStatus.data,
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billForm
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}
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}
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});
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} catch (error) {
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logger.log("bill-ocr-multipage-error", "ERROR", req.user.email, jobStatus.context.jobid, { ...jobStatus.data, error: error.message, stack: error.stack });
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return res.status(500).send({
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status: 'COMPLETED',
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error: 'Data processed but failed to generate bill form',
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message: error.message,
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data: jobStatus.data // Still return the raw processed data
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});
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}
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}
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return res.status(200).send({
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status: 'COMPLETED',
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data: {
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...jobStatus.data,
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billForm
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}
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});
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} else if (jobStatus.status === 'FAILED') {
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logger.log("bill-ocr-multipage-failed", "ERROR", req.user.email, jobStatus.context.jobid, { ...jobStatus.data, error: jobStatus.error, });
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return res.status(500).json({
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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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return res.status(200).json({
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status: jobStatus.status
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});
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}
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}
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/**
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* Process a single-page document synchronously using AnalyzeExpenseCommand
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* @param {Buffer} pdfBuffer
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* @returns {Promise<Object>}
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*/
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async function processSinglePageDocument(pdfBuffer) {
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const analyzeCommand = new AnalyzeExpenseCommand({
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Document: {
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Bytes: pdfBuffer
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}
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});
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const result = await textractClient.send(analyzeCommand);
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const invoiceData = extractInvoiceData(result);
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const processedData = processScanData(invoiceData);
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return {
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...processedData,
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originalTextractResponse: result
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};
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}
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async function startTextractJob(pdfBuffer, context = {}) {
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// Upload PDF to S3 temporarily for Textract async processing
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const { bodyshopid, jobid } = context;
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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 uploadId = uuidv4();
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const s3Key = `textract-temp/${bodyshopid}/${jobid}/${uploadId}.pdf`; //TODO Update Keys structure to something better.
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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' //Hard coded - we only support PDFs for multi-page
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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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NotificationChannel: {
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SNSTopicArn: snsTopicArn,
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RoleArn: snsRoleArn
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},
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ClientRequestToken: uploadId
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});
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const startResult = await textractClient.send(startCommand);
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const textractJobId = startResult.JobId;
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// Store job info in Redis using textractJobId as the key
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await setTextractJob(
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{
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redisPubClient,
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textractJobId,
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jobData: {
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status: 'IN_PROGRESS',
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s3Key: s3Key,
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uploadId: uploadId,
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startedAt: new Date().toISOString(),
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context: context // Store the context for later use
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}
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}
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);
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return {
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jobId: textractJobId
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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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logger.log("bill-ocr-error", "ERROR", "api", null, { message: "AWS_TEXTRACT_SQS_QUEUE_URL not configured" });
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return;
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}
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// Only poll if there are active mutli page jobs in progress
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const hasActive = await hasActiveJobs({ redisPubClient });
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if (!hasActive) {
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return;
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}
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try {
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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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if (result.Messages && result.Messages.length > 0) {
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logger.log("bill-ocr-sqs-processing", "DEBUG", "api", null, { message: `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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// Environment-level filtering: check if this message belongs to this environment
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const shouldProcess = await shouldProcessMessage(message);
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if (shouldProcess) {
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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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}
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} catch (error) {
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logger.log("bill-ocr-sqs-processing-error", "ERROR", "api", null, { message, error: error.message, stack: error.stack });
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}
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}
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}
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} catch (error) {
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logger.log("bill-ocr-sqs-receiving-error", "ERROR", "api", null, { error: error.message, stack: error.stack });
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}
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}
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/**
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* Check if a message should be processed by this environment
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* @param {Object} message - SQS message
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* @returns {Promise<boolean>}
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*/
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async function shouldProcessMessage(message) {
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try {
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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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// Check if job exists in Redis for this environment (using environment-specific prefix)
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const exists = await jobExists(textractJobId);
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return exists;
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} catch (error) {
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logger.log("bill-ocr-message-check-error", "DEBUG", "api", null, { message: "Error checking if message should be processed", error: error.message, stack: error.stack });
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// If we can't parse the message, don't process it
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return false;
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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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let snsMessage
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try {
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snsMessage = JSON.parse(body.Message);
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} catch (error) {
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logger.log("bill-ocr-handle-textract-error", "DEBUG", "api", null, { message: "Error parsing SNS message - invalid message format.", error: error.message, stack: error.stack, body });
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return;
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}
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const textractJobId = snsMessage.JobId;
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const status = snsMessage.Status;
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// Get job info from Redis
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const jobInfo = await getTextractJob({ redisPubClient, textractJobId });
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if (!jobInfo) {
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logger.log("bill-ocr-job-not-found", "DEBUG", "api", null, { message: `Job info not found in Redis for Textract job ID: ${textractJobId}`, textractJobId, snsMessage });
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return;
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}
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if (status === 'SUCCEEDED') {
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// Retrieve the results
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const { processedData, originalResponse } = await retrieveTextractResults(textractJobId);
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// Store the processed data - billForm will be generated on-demand in the status endpoint
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await setTextractJob(
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{
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redisPubClient,
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textractJobId,
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jobData: {
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...jobInfo,
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status: 'COMPLETED',
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data: {
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...processedData,
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originalTextractResponse: originalResponse
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},
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completedAt: new Date().toISOString()
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}
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}
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);
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} else if (status === 'FAILED') {
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await setTextractJob(
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{
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redisPubClient,
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textractJobId,
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jobData: {
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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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}
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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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// Store the complete original response
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const fullTextractResponse = { ExpenseDocuments: allExpenseDocuments };
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// Extract invoice data from Textract response
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const invoiceData = extractInvoiceData(fullTextractResponse);
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return {
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processedData: processScanData(invoiceData),
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originalResponse: fullTextractResponse
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};
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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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logger.log("bill-ocr-sqs-poll-error", "ERROR", "api", null, { message: error.message, stack: error.stack });
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});
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}, 10000); // Poll every 10 seconds
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return pollInterval;
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}
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module.exports = {
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initializeBillOcr,
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handleBillOcr,
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handleBillOcrStatus,
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startSQSPolling
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};
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