Canvas Assignment Assistant

import { JSDOM } from "jsdom"; // Parse HTML to plain text with better handling of special characters export function htmlToPlainText(html: string | null): string { if (!html) return ''; const dom = new JSDOM(html); // Preserve line breaks and spacing in text content return dom.window.document.body.textContent?.replace(/\$(\d+)/g, '\\$$$1') || ''; } // Helper function for safer HTML to Markdown conversion export function convertHtmlToMarkdown(html: string): string { const dom = new JSDOM(html); const document = dom.window.document; // Helper to get text content while preserving $ signs const getTextContent = (element: Element): string => { return element.textContent?.replace(/\$(\d+)/g, '\\$$$1') || ''; }; // Process the HTML in a more structured way function processNode(node: Node): string { if (node.nodeType === node.TEXT_NODE) { return node.textContent?.replace(/\$(\d+)/g, '\\$$$1') || ''; } if (node.nodeType !== node.ELEMENT_NODE) { return ''; } const element = node as Element; let result = ''; switch (element.tagName.toLowerCase()) { case 'h1': return `# ${getTextContent(element)}\n\n`; case 'h2': return `## ${getTextContent(element)}\n\n`; case 'h3': return `### ${getTextContent(element)}\n\n`; case 'strong': case 'b': return `**${getTextContent(element)}**`; case 'em': case 'i': return `*${getTextContent(element)}*`; case 'ul': return Array.from(element.children) .map(li => `- ${processNode(li)}`) .join('\n') + '\n\n'; case 'ol': return Array.from(element.children) .map((li, index) => `${index + 1}. ${processNode(li)}`) .join('\n') + '\n\n'; case 'li': return Array.from(element.childNodes) .map(child => processNode(child)) .join('').trim(); case 'p': return Array.from(element.childNodes) .map(child => processNode(child)) .join('') + '\n\n'; case 'br': return '\n'; case 'a': const href = element.getAttribute('href'); const text = getTextContent(element); return href ? `[${text}](${href})` : text; default: return Array.from(element.childNodes) .map(child => processNode(child)) .join(''); } } // Process the body content const result = Array.from(document.body.childNodes) .map(node => processNode(node)) .join('') .trim(); // Clean up any extra newlines return result.replace(/\n\n\n+/g, '\n\n'); } // Helper function to extract links from HTML export function extractLinks(html: string | null): { text: string; href: string }[] { if (!html) return []; const dom = new JSDOM(html); const links = dom.window.document.querySelectorAll('a'); return Array.from(links).map(link => ({ text: link.textContent || '', href: link.getAttribute('href') || '' })); }