pdf convert wasm only

src/util/generateDocumentThumb.js

@@ -1,48 +1,19 @@
 import sharp from 'sharp';
-import { spawn } from 'node:child_process';
+import { pdfToPng } from 'pdfconvert-wasm';
 
 const THUMB_MAX = 200;
 
 /**
- * Renders page 1 of a PDF into a PNG buffer using pdftocairo.
+ * Renders page 1 of a PDF into a PNG buffer using pdfconvert-wasm.
  * @param {Buffer} pdfBuffer
  * @returns {Promise<Buffer>}
  */
-function renderPdfPageToPng(pdfBuffer) {
-  return new Promise((resolve, reject) => {
-    const proc = spawn('pdftocairo', ['-png', '-singlefile', '-', '-'], {
-      stdio: ['pipe', 'pipe', 'pipe'],
-    });
-
-    const chunks = [];
-    const errChunks = [];
-
-    proc.stdout.on('data', (chunk) => chunks.push(chunk));
-    proc.stderr.on('data', (chunk) => errChunks.push(chunk));
-
-    proc.stdin.on('error', (err) => {
-      console.warn('[pdftocairo] stdin stream error:', err.message);
-    });
-
-    proc.on('error', (err) => {
-      reject(new Error(`Failed to start pdftocairo: ${err.message}`));
-    });
-
-    proc.on('close', (code) => {
-      if (code !== 0) {
-        const stderr = Buffer.concat(errChunks).toString('utf8').trim();
-        reject(new Error(`pdftocairo exited with code ${code}${stderr ? `: ${stderr}` : ''}`));
-      } else {
-        resolve(Buffer.concat(chunks));
-      }
-    });
-
-    try {
-      proc.stdin.end(pdfBuffer);
-    } catch (writeErr) {
-      console.warn('[pdftocairo] Failed writing to stdin:', writeErr.message);
-    }
-  });
+async function renderPdfPageToPng(pdfBuffer) {
+  const images = await pdfToPng(pdfBuffer, { dpi: 150, singleFile: true });
+  if (!images || images.length === 0 || !images[0].data) {
+    throw new Error('pdfconvert-wasm produced no image output');
+  }
+  return Buffer.from(images[0].data);
 }
 
 /**
@@ -51,9 +22,10 @@ function renderPdfPageToPng(pdfBuffer) {
  *
  * @param {Buffer} content
  * @param {string} mimetype
+ * @param {Object} [options]
  * @returns {Promise<{thumbavif: Buffer|null, thumbx: number|null, thumby: number|null}>}
  */
-export default async function generateDocumentThumb(content, mimetype) {
+export default async function generateDocumentThumb(content, mimetype, options = {}) {
   if (!Buffer.isBuffer(content) || content.length === 0) {
     return { thumbavif: null, thumbx: null, thumby: null };
   }