Create routes/upload.js

routes/upload.js

@@ -0,0 +1,66 @@
+import express from "express";
+import multer from "multer";
+import mammoth from "mammoth";
+import { MODEL_CAPS, MAX_FILE_BYTES } from "../lib/modelCaps.js";
+
+const router = express.Router();
+const upload = multer({ storage: multer.memoryStorage(), limits: { fileSize: MAX_FILE_BYTES } });
+
+function extOf(name = "") { return (name.split(".").pop() || "").toLowerCase(); }
+
+async function extractText(file) {
+  const ext = extOf(file.originalname);
+  if (["txt", "md", "csv", "json", "js", "ts", "py", "html", "css", "java", "c", "cpp"].includes(ext)) {
+    return file.buffer.toString("utf8");
+  }
+  if (ext === "docx") {
+    const { value } = await mammoth.extractRawText({ buffer: file.buffer });
+    return value;
+  }
+  if (ext === "pdf") {
+    // pdf-parse عبر import ديناميكي (CJS)
+    const pdfParse = (await import("pdf-parse")).default;
+    const data = await pdfParse(file.buffer);
+    return data.text;
+  }
+  return "";
+}
+
+// POST /api/upload  (multipart: file, model)
+router.post("/upload", upload.single("file"), async (req, res) => {
+  try {
+    const model = (req.body.model || "flash").toLowerCase();
+    const caps = MODEL_CAPS[model] || MODEL_CAPS.flash;
+    const file = req.file;
+    if (!file) return res.status(400).json({ error: "no_file" });
+
+    const ext = extOf(file.originalname);
+    const isImage = file.mimetype.startsWith("image/");
+
+    // تحقق من دعم النموذج لهذا النوع
+    if (isImage) {
+      if (!caps.vision || !caps.imageMimes.includes(file.mimetype)) {
+        return res.status(415).json({ error: "unsupported", message: `النموذج (${model}) لا يدعم الصور.` });
+      }
+      const b64 = file.buffer.toString("base64");
+      return res.json({
+        kind: "image",
+        name: file.originalname,
+        dataUrl: `data:${file.mimetype};base64,${b64}`,
+      });
+    }
+
+    if (!caps.docExts.includes(ext)) {
+      return res.status(415).json({ error: "unsupported", message: `النموذج (${model}) لا يدعم ملفات .${ext}` });
+    }
+
+    let text = await extractText(file);
+    if (text.length > 20000) text = text.slice(0, 20000) + "\n...[truncated]";
+    return res.json({ kind: "text", name: file.originalname, text });
+  } catch (err) {
+    console.error("upload error:", err);
+    res.status(500).json({ error: "upload_failed", message: String(err?.message || err) });
+  }
+});
+
+export default router;