@adobe/pdftools-extract-node-sdk/src/internal/api/operation-service.js

The Document Services PDF Tools Extract Node.js SDK provides APIs for extracting elements and renditions from PDF

/*
 * Copyright 2019 Adobe
 * All Rights Reserved.
 *
 * NOTICE: Adobe permits you to use, modify, and distribute this file in
 * accordance with the terms of the Adobe license agreement accompanying
 * it. If you have received this file from a source other than Adobe,
 * then your use, modification, or distribution of it requires the prior
 * written permission of Adobe.
 */

const logger = require('./../logger'),
	CPFApi = require('./cpf-api'),
	CPFMessage = require('./../cpf/cpf-message'),
	OperationMessage = require('./../cpf/operation-message'),
	Engine = require('../cpf/request/engine.js'),
	ContentAnalyzerRequests = require('../cpf/request/content-analyzer-requests.js');

/**
 * Operation Service is an abstract class. All the document operation services need to inherit this class and have to
 * override getCPFMessage. CPFApi class is used for making the CPF Predict and Status API calls.
 */
class OperationService {

	constructor() {
		if (this.constructor === OperationService) {
			throw new TypeError("Can not construct OperationService class.");
		}
	}

	getCPFMessage(operationMessage) {
		throw new Error("Method 'getCPFMessage()' must be implemented.");
	}

	perform(context, operationMessage) {
		let cpfMessage = this.getCPFMessage(operationMessage),
			engine = new Engine(cpfMessage.inputDocuments, cpfMessage.params, cpfMessage.outputDocument),
			contentAnalyzerRequests = new ContentAnalyzerRequests(cpfMessage.cpfEngineConfig, engine),
			contentAnalyzerRequestsJsonString = JSON.stringify(contentAnalyzerRequests);

		let operation = operationMessage.operationName.replace(/\s/g, '');
		return CPFApi.cpfPredictApi(context, cpfMessage.files, contentAnalyzerRequestsJsonString, operation)
			.then(location => {
				return CPFApi.cpfStatusApi(context, location, operationMessage.targetFileName);})
			.then(targetFileRef => {
				targetFileRef.input.isOperationResult = true;
				logger.info(operationMessage.operationName + ' successfully completed');
				return Promise.resolve(targetFileRef);
			})
			.catch(res => Promise.reject(res));
	}

}

module.exports = OperationService;