legal-markdown-js/dist/extensions/parsers/pandoc-loader.js

Node.js implementation of LegalMarkdown for processing legal documents with markdown and YAML - Complete feature parity with Ruby version

import { ContentDetector } from './content-detector.js';
/**
 * Dynamic pandoc loader with conditional loading
 */
export class PandocLoader {
    static pandocWasm = null;
    static loadingPromise = null;
    /**
     * Loads pandoc only if content needs it
     */
    static async loadIfNeeded(content) {
        if (!ContentDetector.needsPandoc(content)) {
            return false; // No necesita pandoc
        }
        if (typeof window === 'undefined') {
            // Node.js environment - assume pandoc is available
            return true;
        }
        // Browser environment - load pandoc-wasm
        if (this.pandocWasm) {
            return true; // Already loaded
        }
        if (this.loadingPromise) {
            // Loading in progress, wait for it
            try {
                await this.loadingPromise;
                return this.pandocWasm !== null;
            }
            catch (error) {
                return false;
            }
        }
        // Start loading
        this.loadingPromise = this.loadPandocWasm();
        try {
            this.pandocWasm = await this.loadingPromise;
            return true;
        }
        catch (error) {
            console.warn('Failed to load pandoc-wasm:', error);
            return false;
        }
        finally {
            this.loadingPromise = null;
        }
    }
    /**
     * Get loaded pandoc instance
     */
    static getPandocWasm() {
        return this.pandocWasm;
    }
    /**
     * Load pandoc-wasm module
     */
    static async loadPandocWasm() {
        try {
            // Dynamic import for pandoc-wasm
            const pandocModule = await import('pandoc-wasm');
            // Initialize pandoc-wasm - different pandoc-wasm versions have different APIs
            if (typeof pandocModule.init === 'function') {
                return await pandocModule.init();
            }
            else if (typeof pandocModule.default === 'function') {
                return await pandocModule.default();
            }
            else if (typeof pandocModule.default === 'object' &&
                pandocModule.default.convert) {
                return pandocModule.default;
            }
            else {
                return pandocModule;
            }
        }
        catch (error) {
            throw new Error(`Failed to load pandoc-wasm: ${error.message}`);
        }
    }
    /**
     * Reset loader state (mainly for testing)
     */
    static reset() {
        this.pandocWasm = null;
        this.loadingPromise = null;
    }
}
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