fix(imagemagick): handle multi-page PDF outputs and improve rasterization quality (#593)

src/converters/imagemagick.ts

@@ -461,6 +461,11 @@ export function convert(
     }
   }
 
+  // Increase rasterization quality for PDF input
+  if (fileType === "pdf") {
+    inputArgs.push("-density", "300");
+  }
+
   // Handle EMF files specifically to avoid LibreOffice delegate issues
   if (fileType === "emf") {
     // Use direct conversion without delegates for EMF files

src/converters/main.ts

@@ -1,5 +1,7 @@
 import { Cookie } from "elysia";
 import db from "../db/db";
+import fs from "node:fs";
+import path from "node:path";
 import { MAX_CONVERT_PROCESS } from "../helpers/env";
 import { normalizeFiletype, normalizeOutputFiletype } from "../helpers/normalizeFiletype";
 import { convert as convertassimp, properties as propertiesassimp } from "./assimp";
@@ -187,7 +189,31 @@ export async function handleConvert(
           mainConverter(filePath, fileType, convertTo, targetPath, {}, converterName)
             .then((r) => {
               if (jobId.value) {
-                query.run(jobId.value, fileName, newFileName, r);
+                const dir = path.dirname(targetPath);
+                const parsed = path.parse(targetPath);
+
+                const outputFiles = fs
+                  .readdirSync(dir)
+                  .filter((f) => {
+                    if (f === parsed.base) {
+                      return true;
+                    }
+
+                    return (
+                      f.startsWith(`${parsed.name}-`) &&
+                      f.endsWith(parsed.ext) &&
+                      /^\d+$/.test(f.slice(parsed.name.length + 1, -parsed.ext.length))
+                    );
+                  })
+                  .sort((a, b) => a.localeCompare(b, undefined, { numeric: true }));
+
+                if (outputFiles.length > 0) {
+                  for (const outputFile of outputFiles) {
+                    query.run(jobId.value, fileName, outputFile, r);
+                  }
+                } else {
+                  query.run(jobId.value, fileName, newFileName, r);
+                }
               }
               resolve(r);
             })