// This val creates a cover letter generator using OpenAI's GPT model // It takes a resume (as a PDF file) and job description as input and returns a concise cover letter import { OpenAI } from "https://esm.town/v/std/openai"; export default async function server(req: Request): Promise { console.log("Request method:", req.method); if (req.method === "GET") { console.log("Serving GET request"); return new Response(` Cover Letter Generator

Cover Letter Generator

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`, { headers: { "Content-Type": "text/html" }, }); } else if (req.method === "POST") { console.log("Handling POST request"); const formData = await req.formData(); const resumeFile = formData.get("resume") as File; const jobDescription = formData.get("jobDescription") as string; console.log("Resume file name:", resumeFile?.name); console.log("Job Description length:", jobDescription?.length); if (!resumeFile || !jobDescription) { return new Response("Both resume file and job description are required.", { status: 400 }); } if (!resumeFile.name.toLowerCase().endsWith('.pdf')) { return new Response("Resume must be a PDF file.", { status: 400 }); } const resumeText = await extractTextFromPDF(resumeFile); if (!resumeText) { return new Response("Failed to extract text from the PDF. Please ensure it's a valid PDF file.", { status: 400 }); } try { console.log("Generating cover letter"); const coverLetter = await generateCoverLetter(resumeText, jobDescription); console.log("Cover letter generated, length:", coverLetter.length); return new Response(` Generated Cover Letter

Generated Cover Letter

${coverLetter}

Generate Another Cover Letter

`, { headers: { "Content-Type": "text/html" }, }); } catch (error) { console.error("Error generating cover letter:", error); return new Response(`Error generating cover letter: ${error.message}`, { status: 500 }); } } else { return new Response("Method not allowed", { status: 405 }); } } async function extractTextFromPDF(file: File): Promise { try { const { default: pdfjs } = await import("https://esm.sh/pdfjs-dist@3.4.120/build/pdf.min.js"); const arrayBuffer = await file.arrayBuffer(); const pdf = await pdfjs.getDocument({ data: arrayBuffer }).promise; let text = ''; for (let i = 1; i <= pdf.numPages; i++) { const page = await pdf.getPage(i); const content = await page.getTextContent(); text += content.items.map((item: any) => item.str).join(' ') + '\n'; } return text.trim(); } catch (error) { console.error("Error extracting text from PDF:", error); return null; } } async function generateCoverLetter(resume: string, jobDescription: string): Promise { console.log("Entering generateCoverLetter function"); const openai = new OpenAI(); console.log("OpenAI instance created"); try { const completion = await openai.chat.completions.create({ model: "gpt-4o-mini", messages: [ { role: "system", content: "You are an expert in creating concise and effective cover letters. Your task is to generate a cover letter based on the provided resume and job description." }, { role: "user", content: `Please create a concise cover letter based on the following resume and job description: Resume: ${resume} Job Description: ${jobDescription} The cover letter should be no more than 3-4 paragraphs long, highlighting the most relevant experiences and skills from the resume that match the job description. Make it persuasive and tailored to the specific job.` } ], max_tokens: 500, }); console.log("OpenAI API call completed"); return completion.choices[0].message.content || "Unable to generate cover letter."; } catch (error) { console.error("Error in OpenAI API call:", error); throw error; } }

Cover Letter Generator

Upload Resume (PDF)

Job Description

Generated Cover Letter

CoverLetterGenerator

Version 0