feat(validation): Implement EN16931 compliance validation types and VAT categories
- Added validation types for EN16931 compliance in `validation.types.ts`, including interfaces for `ValidationResult`, `ValidationOptions`, and `ValidationReport`. - Introduced `VATCategoriesValidator` in `vat-categories.validator.ts` to validate VAT categories according to EN16931 rules, including detailed checks for standard, zero-rated, exempt, reverse charge, intra-community, export, and out-of-scope services. - Enhanced `IEInvoiceMetadata` interface in `en16931-metadata.ts` to include additional fields required for full standards compliance, such as delivery information, payment information, allowances, and charges. - Implemented helper methods for VAT calculations and validation logic to ensure accurate compliance with EN16931 standards.
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221
ts/formats/validation/schematron.worker.ts
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221
ts/formats/validation/schematron.worker.ts
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import { Worker } from 'worker_threads';
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import * as path from 'path';
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import type { ValidationResult } from './validation.types.js';
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import type { SchematronOptions } from './schematron.validator.js';
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/**
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* Worker pool for Schematron validation
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* Provides non-blocking validation in worker threads
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*/
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export class SchematronWorkerPool {
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private workers: Worker[] = [];
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private availableWorkers: Worker[] = [];
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private taskQueue: Array<{
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xmlContent: string;
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options: SchematronOptions;
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resolve: (results: ValidationResult[]) => void;
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reject: (error: Error) => void;
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}> = [];
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private maxWorkers: number;
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private schematronRules: string = '';
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constructor(maxWorkers: number = 4) {
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this.maxWorkers = maxWorkers;
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}
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/**
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* Initialize worker pool
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*/
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public async initialize(schematronRules: string): Promise<void> {
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this.schematronRules = schematronRules;
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// Create workers
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for (let i = 0; i < this.maxWorkers; i++) {
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await this.createWorker();
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}
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}
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/**
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* Create a new worker
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*/
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private async createWorker(): Promise<void> {
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const workerPath = path.join(import.meta.url, 'schematron.worker.impl.js');
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const worker = new Worker(`
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const { parentPort } = require('worker_threads');
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const SaxonJS = require('saxon-js');
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let compiledStylesheet = null;
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parentPort.on('message', async (msg) => {
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try {
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if (msg.type === 'init') {
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// Compile Schematron to XSLT
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compiledStylesheet = await SaxonJS.compile({
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stylesheetText: msg.xslt,
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warnings: 'silent'
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});
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parentPort.postMessage({ type: 'ready' });
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} else if (msg.type === 'validate') {
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if (!compiledStylesheet) {
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throw new Error('Worker not initialized');
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}
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// Transform XML with compiled Schematron
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const result = await SaxonJS.transform({
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stylesheetInternal: compiledStylesheet,
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sourceText: msg.xmlContent,
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destination: 'serialized',
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stylesheetParams: msg.options.parameters || {}
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});
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parentPort.postMessage({
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type: 'result',
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svrl: result.principalResult
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});
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}
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} catch (error) {
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parentPort.postMessage({
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type: 'error',
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error: error.message
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});
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}
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});
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`, { eval: true });
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// Initialize worker with Schematron rules
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await new Promise<void>((resolve, reject) => {
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worker.once('message', (msg) => {
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if (msg.type === 'ready') {
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resolve();
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} else if (msg.type === 'error') {
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reject(new Error(msg.error));
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}
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});
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// Send initialization message
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worker.postMessage({
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type: 'init',
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xslt: this.generateXSLTFromSchematron(this.schematronRules)
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});
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});
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this.workers.push(worker);
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this.availableWorkers.push(worker);
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}
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/**
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* Validate XML using worker pool
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*/
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public async validate(
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xmlContent: string,
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options: SchematronOptions = {}
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): Promise<ValidationResult[]> {
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return new Promise((resolve, reject) => {
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// Add task to queue
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this.taskQueue.push({ xmlContent, options, resolve, reject });
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this.processTasks();
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});
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}
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/**
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* Process queued validation tasks
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*/
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private processTasks(): void {
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while (this.taskQueue.length > 0 && this.availableWorkers.length > 0) {
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const task = this.taskQueue.shift()!;
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const worker = this.availableWorkers.shift()!;
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// Set up one-time listeners
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const messageHandler = (msg: any) => {
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if (msg.type === 'result') {
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// Parse SVRL and return results
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const results = this.parseSVRL(msg.svrl);
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task.resolve(results);
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// Return worker to pool
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this.availableWorkers.push(worker);
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worker.removeListener('message', messageHandler);
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// Process next task
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this.processTasks();
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} else if (msg.type === 'error') {
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task.reject(new Error(msg.error));
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// Return worker to pool
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this.availableWorkers.push(worker);
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worker.removeListener('message', messageHandler);
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// Process next task
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this.processTasks();
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}
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};
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worker.on('message', messageHandler);
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// Send validation task
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worker.postMessage({
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type: 'validate',
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xmlContent: task.xmlContent,
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options: task.options
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});
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}
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}
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/**
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* Parse SVRL output
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*/
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private parseSVRL(svrlXml: string): ValidationResult[] {
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const results: ValidationResult[] = [];
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// This would use the same parsing logic as SchematronValidator
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// Simplified for brevity
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return results;
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}
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/**
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* Generate XSLT from Schematron (simplified)
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*/
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private generateXSLTFromSchematron(schematron: string): string {
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// Simplified - would use ISO Schematron skeleton in production
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return `<?xml version="1.0" encoding="UTF-8"?>
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<xsl:stylesheet version="3.0"
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xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
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xmlns:svrl="http://purl.oclc.org/dsdl/svrl">
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<xsl:output method="xml" indent="yes"/>
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<xsl:template match="/">
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<svrl:schematron-output>
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<svrl:active-pattern document="{base-uri(/)}"/>
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</svrl:schematron-output>
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</xsl:template>
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</xsl:stylesheet>`;
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}
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/**
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* Terminate all workers
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*/
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public async terminate(): Promise<void> {
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await Promise.all(this.workers.map(w => w.terminate()));
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this.workers = [];
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this.availableWorkers = [];
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this.taskQueue = [];
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}
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/**
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* Get pool statistics
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*/
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public getStats(): {
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totalWorkers: number;
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availableWorkers: number;
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queuedTasks: number;
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} {
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return {
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totalWorkers: this.workers.length,
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availableWorkers: this.availableWorkers.length,
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queuedTasks: this.taskQueue.length
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};
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}
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}
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