forked from geolba/tethys.backend
Arno Kaimbacher
2a7480d2ed
- added relation 'collectionRole' to Collection.ts class - added 'ListSets' and =GetRecord request for OaiController.ts - npm updates - added utility-functions.ts
397 lines
16 KiB
TypeScript
397 lines
16 KiB
TypeScript
import type { HttpContextContract } from '@ioc:Adonis/Core/HttpContext';
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import { RequestContract } from '@ioc:Adonis/Core/Request';
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import { XMLBuilder } from 'xmlbuilder2/lib/interfaces';
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import { create } from 'xmlbuilder2';
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import dayjs, { Dayjs } from 'dayjs';
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import utc from 'dayjs/plugin/utc';
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import timezone from 'dayjs/plugin/timezone';
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import { readFileSync } from 'fs';
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import { StatusCodes } from 'http-status-codes';
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import { transform } from 'saxon-js';
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// import { Xslt, xmlParse } from 'xslt-processor'
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import { OaiErrorCodes, OaiModelError } from 'App/Exceptions/OaiErrorCodes';
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import { OaiModelException, BadOaiModelException } from 'App/Exceptions/OaiModelException';
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import Dataset from 'App/Models/Dataset';
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import Collection from 'App/Models/Collection';
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import { getDomain } from 'App/Utils/utility-functions';
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import XmlModel from 'App/Library/XmlModel';
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interface XslTParameter {
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[key: string]: any;
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}
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interface Dictionary {
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[index: string]: string;
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}
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export default class OaiController {
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private deliveringDocumentStates = ['published', 'deleted'];
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// private sampleRegEx = /^[A-Za-zäüÄÜß0-9\-_.!~]+$/;
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private xsltParameter: XslTParameter;
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// private configuration: Configuration;
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// private tokenWorker: TokenWorker;
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/**
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* Holds xml representation of document information to be processed.
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*
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* @var xmlbuilder.XMLDocument | null Defaults to null.
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*/
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private xml: XMLBuilder;
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private proc;
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constructor() {
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// Load the XSLT file
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this.proc = readFileSync('public/assets2/datasetxml2oai.sef.json');
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// tests
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// const xslPath = 'assets/datasetxml2oai-pmh.xslt'; // Replace with the actual path to your XSLT file
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// this.proc = readFileSync(xslPath, 'utf-8');
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// this.configuration = new Configuration();
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dayjs.extend(utc);
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dayjs.extend(timezone);
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}
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public async index({ response, request }: HttpContextContract): Promise<void> {
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this.xml = create({ version: '1.0', encoding: 'UTF-8', standalone: true }, '<root></root>');
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// this.proc = new XSLTProcessor();
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// const stylesheet = readFileSync(__dirname + "/datasetxml2oai.sef.json");
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const xsltParameter = (this.xsltParameter = {});
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let oaiRequest: Dictionary = {};
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if (request.method() === 'POST') {
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oaiRequest = request.body();
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} else if (request.method() === 'GET') {
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oaiRequest = request.qs();
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} else {
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xsltParameter['oai_error_code'] = 'unknown';
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xsltParameter['oai_error_message'] = 'Only POST and GET methods are allowed for OAI-PMH.';
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}
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// const oaiRequest: OaiParameter = request.body;
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try {
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await this.handleRequest(oaiRequest, request);
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} catch (error) {
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if (error instanceof OaiModelException) {
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const code = error.oaiCode;
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let oaiErrorCode: string | undefined = 'Unknown oai error code ' + code;
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if (OaiModelError.has(error.oaiCode) && OaiModelError.get(code) !== undefined) {
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oaiErrorCode = OaiModelError.get(error.oaiCode);
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}
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this.xsltParameter['oai_error_code'] = oaiErrorCode;
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this.xsltParameter['oai_error_message'] = error.message;
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} else {
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// // return next(error); // passing to default express middleware error handler
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this.xsltParameter['oai_error_code'] = 'unknown';
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this.xsltParameter['oai_error_message'] = 'An internal error occured.';
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}
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}
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const xmlString = this.xml.end({ prettyPrint: true });
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let xmlOutput;
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try {
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const result = await transform({
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// stylesheetFileName: `${config.TMP_BASE_DIR}/data-quality/rules/iati.sef.json`,
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stylesheetText: this.proc,
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destination: 'serialized',
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// sourceFileName: sourceFile,
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sourceText: xmlString,
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stylesheetParams: xsltParameter,
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// logLevel: 10,
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});
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xmlOutput = result.principalResult;
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} catch (error) {
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return response.status(500).json({
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message: 'An error occurred while creating the user',
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error: error.message,
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});
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}
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response
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.header('Content-Type', 'application/xml; charset=utf-8')
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.header('Access-Control-Allow-Origin', '*')
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.header('Access-Control-Allow-Methods', 'GET,POST');
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response.status(StatusCodes.OK).send(xmlOutput);
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}
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protected async handleRequest(oaiRequest: Dictionary, request: RequestContract) {
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// Setup stylesheet
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// $this->loadStyleSheet('datasetxml2oai-pmh.xslt');
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// Set response time
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const now: Dayjs = dayjs();
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this.xsltParameter['responseDate'] = now.format('YYYY-MM-DDTHH:mm:ss[Z]');
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this.xsltParameter['unixTimestamp'] = now.unix();
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// set OAI base url
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const baseDomain = process.env.BASE_DOMAIN || 'localhost';
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this.xsltParameter['baseURL'] = baseDomain + '/oai';
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this.xsltParameter['repURL'] = request.protocol() + '://' + request.hostname();
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this.xsltParameter['downloadLink'] = request.protocol() + '://' + request.hostname() + '/file/download/';
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this.xsltParameter['doiLink'] = 'https://doi.org/';
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this.xsltParameter['doiPrefix'] = 'info:eu-repo/semantics/altIdentifier/doi/';
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if (oaiRequest['verb']) {
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const verb = oaiRequest['verb'];
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this.xsltParameter['oai_verb'] = verb;
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if (verb === 'Identify') {
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this.handleIdentify();
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} else if (verb === 'ListMetadataFormats') {
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this.handleListMetadataFormats();
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} else if (verb == 'GetRecord') {
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await this.handleGetRecord(oaiRequest);
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}
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// else if (verb == "ListRecords") {
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// await this.handleListRecords(oaiRequest);
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// } else if (verb == "ListIdentifiers") {
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// await this.handleListIdentifiers(oaiRequest);
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// }
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else if (verb == 'ListSets') {
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await this.handleListSets();
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} else {
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this.handleIllegalVerb();
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}
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} else {
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// // try {
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// // console.log("Async code example.")
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// const err = new PageNotFoundException("verb not found");
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// throw err;
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// // } catch (error) { // manually catching
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// // next(error); // passing to default middleware error handler
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// // }
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throw new OaiModelException(
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StatusCodes.INTERNAL_SERVER_ERROR,
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'The verb provided in the request is illegal.',
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OaiErrorCodes.BADVERB,
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);
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}
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}
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protected handleIdentify() {
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const email = process.env.OAI_EMAIL || 'repository@geosphere.at';
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const repositoryName = 'Tethys RDR';
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const repIdentifier = 'tethys.at';
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const sampleIdentifier = 'oai:' + repIdentifier + ':1'; //$this->_configuration->getSampleIdentifier();
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// Dataset::earliestPublicationDate()->server_date_published->format('Y-m-d\TH:i:s\Z') : null;
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// earliestDateFromDb!= null && (this.xsltParameter['earliestDatestamp'] = earliestDateFromDb?.server_date_published);
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// set parameters for oai-pmh.xslt
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this.xsltParameter['email'] = email;
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this.xsltParameter['repositoryName'] = repositoryName;
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this.xsltParameter['repIdentifier'] = repIdentifier;
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this.xsltParameter['sampleIdentifier'] = sampleIdentifier;
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// $this->proc->setParameter('', 'earliestDatestamp', $earliestDateFromDb);
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this.xml.root().ele('Datasets');
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}
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protected handleListMetadataFormats() {
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this.xml.root().ele('Datasets');
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}
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protected async handleListSets() {
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const repIdentifier = 'tethys.at';
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this.xsltParameter['repIdentifier'] = repIdentifier;
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const datasetElement = this.xml.root().ele('Datasets');
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const sets: { [key: string]: string } = {
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'open_access': 'Set for open access licenses',
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'doc-type:ResearchData': 'Set for document type ResearchData',
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// ...(await this.getSetsForDatasetTypes()),
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...(await this.getSetsForCollections()),
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// ... await this.getSetsForProjects(),
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} as Dictionary;
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for (const [key, value] of Object.entries(sets)) {
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const setElement = datasetElement.ele('Rdr_Sets');
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setElement.att('Type', key);
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setElement.att('TypeName', value);
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}
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}
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protected async handleGetRecord(oaiRequest: Dictionary) {
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const repIdentifier = 'tethys.at';
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this.xsltParameter['repIdentifier'] = repIdentifier;
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const dataId = this.validateAndGetIdentifier(oaiRequest);
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const dataset = await Dataset.query().where('publish_id', dataId).preload('xmlCache').preload('collections').first();
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if (!dataset || !dataset.publish_id) {
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throw new OaiModelException(
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StatusCodes.INTERNAL_SERVER_ERROR,
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'The value of the identifier argument is unknown or illegal in this repository.',
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OaiErrorCodes.IDDOESNOTEXIST,
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);
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}
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const metadataPrefix = this.validateAndGetMetadataPrefix(oaiRequest);
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this.xsltParameter['oai_metadataPrefix'] = metadataPrefix;
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// do not deliver datasets which are restricted by document state defined in deliveringStates
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this.validateDatasetState(dataset);
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// add xml elements
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const datasetNode = this.xml.root().ele('Datasets');
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await this.createXmlRecord(dataset, datasetNode);
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}
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private validateAndGetIdentifier(oaiRequest: Dictionary): number {
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// Identifier references metadata Urn, not plain Id!
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// Currently implemented as 'oai:foo.bar.de:{docId}' or 'urn:nbn...-123'
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if (!('identifier' in oaiRequest)) {
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throw new BadOaiModelException('The prefix of the identifier argument is unknown.');
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}
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const dataId = Number(this.getDocumentIdByIdentifier(oaiRequest.identifier));
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if (isNaN(dataId)) {
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throw new OaiModelException(
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StatusCodes.INTERNAL_SERVER_ERROR,
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'The value of the identifier argument is illegal in this repository.',
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OaiErrorCodes.BADARGUMENT,
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);
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}
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return dataId;
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}
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private validateAndGetMetadataPrefix(oaiRequest: Dictionary): string {
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let metadataPrefix = '';
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if ('metadataPrefix' in oaiRequest) {
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metadataPrefix = oaiRequest['metadataPrefix'];
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} else {
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throw new OaiModelException(
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StatusCodes.INTERNAL_SERVER_ERROR,
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'The prefix of the metadata argument is unknown.',
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OaiErrorCodes.BADARGUMENT,
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);
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}
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return metadataPrefix;
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}
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private validateDatasetState(dataset: Dataset): void {
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if (dataset.server_state == null || !this.deliveringDocumentStates.includes(dataset.server_state)) {
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throw new OaiModelException(
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StatusCodes.INTERNAL_SERVER_ERROR,
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'Document is not available for OAI export!',
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OaiErrorCodes.NORECORDSMATCH,
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);
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}
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}
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private async createXmlRecord(dataset: Dataset, datasetNode: XMLBuilder) {
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const domNode = await this.getDatasetXmlDomNode(dataset);
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if (domNode) {
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// add frontdoor url and data-type
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dataset.publish_id && this.addLandingPageAttribute(domNode, dataset.publish_id.toString());
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this.addSpecInformation(domNode, 'data-type:' + dataset.type);
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// if (dataset.collections) {
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// for (const coll of dataset.collections) {
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// const collRole = await coll.getCollectionRole();
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// this.addSpecInformation(domNode, collRole.oai_name + ':' + coll.number);
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// }
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// }
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datasetNode.import(domNode);
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}
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}
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private async getDatasetXmlDomNode(dataset: Dataset) {
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const xmlModel = new XmlModel(dataset);
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// xmlModel.setModel(dataset);
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xmlModel.excludeEmptyFields();
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xmlModel.caching = true;
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// const cache = dataset.xmlCache ? dataset.xmlCache : null;
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// dataset.load('xmlCache');
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if (dataset.xmlCache) {
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xmlModel.xmlCache = dataset.xmlCache;
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}
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// return cache.getDomDocument();
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const domDocument: XMLBuilder | null = await xmlModel.getDomDocument();
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return domDocument;
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}
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private addSpecInformation(domNode: XMLBuilder, information: string) {
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domNode.ele('SetSpec').att('Value', information);
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}
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private addLandingPageAttribute(domNode: XMLBuilder, dataid: string) {
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const baseDomain = process.env.BASE_DOMAIN || 'localhost';
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const url = 'https://' + getDomain(baseDomain) + '/dataset/' + dataid;
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// add attribute du dataset xml element
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domNode.att('landingpage', url);
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}
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private getDocumentIdByIdentifier(oaiIdentifier: string): string {
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const identifierParts: string[] = oaiIdentifier.split(':'); // explode(":", $oaiIdentifier);
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const dataId: string = identifierParts[2];
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// switch (identifierParts[0]) {
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// case 'oai':
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// if (isset($identifierParts[2])) {
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// $dataId = $identifierParts[2];
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// }
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// break;
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// default:
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// throw new OaiModelException(
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// 'The prefix of the identifier argument is unknown.',
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// OaiModelError::BADARGUMENT
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// );
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// break;
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// }
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// if (empty($dataId) or !preg_match('/^\d+$/', $dataId)) {
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// throw new OaiModelException(
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// 'The value of the identifier argument is unknown or illegal in this repository.',
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// OaiModelError::IDDOESNOTEXIST
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// );
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return dataId;
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}
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private async getSetsForCollections(): Promise<Dictionary> {
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const sets: { [key: string]: string } = {} as Dictionary;
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const collections = await Collection.query()
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.select('name', 'number', 'role_id')
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.whereHas('collectionRole', (query) => {
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query.where('visible_oai', true);
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})
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.preload('collectionRole');
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collections.forEach((collection) => {
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// if collection has a collection role (classification like ddc):
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if (collection.number) {
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// collection.load('collectionRole');
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const setSpec = collection.collectionRole?.oai_name + ':' + collection.number;
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sets[setSpec] = `Set ${collection.number} '${collection.name}'`;
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}
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});
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return sets;
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}
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// private async getSetsForDatasetTypes(): Promise<IDictionary> {
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// const sets: { [key: string]: string } = {} as IDictionary;
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// const datasets: Array<Dataset> = await Dataset.findAll({
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// attributes: ["type"],
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// where: { server_state: { [Sequelize.Op.eq]: "published" } },
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// });
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// datasets.forEach((dataset) => {
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// if (dataset.type && false == preg_match(this.sampleRegEx, dataset.type)) {
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// const msg = `Invalid SetSpec (data-type='${dataset.type}').
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// Allowed characters are [${this.sampleRegEx}].`;
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// Logger.err(`OAI: ${msg}`);
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// // Log::error("OAI-PMH: $msg");
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// return;
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// }
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// const setSpec = "data-type:" + dataset.type;
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// sets[setSpec] = `Set for document type '${dataset.type}'`;
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// });
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// return sets;
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// }
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private handleIllegalVerb() {
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this.xsltParameter['oai_error_code'] = 'badVerb';
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this.xsltParameter['oai_error_message'] = 'The verb provided in the request is illegal.';
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}
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}
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