feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params) - Add findByTemplateId method to service - Add GET /by-template/:templateId endpoint to controller - Service already includes CRUD for QuestionBank and QuestionBankItem
2026-04-23 17:19:11 +08:00
commit 0a9588abb7
492 changed files with 112453 additions and 0 deletions
@@ -0,0 +1,60 @@
+import fitz  # PyMuPDF
+import sys
+import os
+import json
+
+def convert_pdf_to_images(pdf_path, output_dir, zoom=2.0, quality=85):
+    """
+    Converts PDF pages to images.
+    zoom: 2.0 means 200% scaling (approx 144 DPI if original is 72 DPI)
+    """
+    try:
+        if not os.path.exists(output_dir):
+            os.makedirs(output_dir)
+
+        doc = fitz.open(pdf_path)
+        images = []
+        
+        # Matrix for scaling (DPI control)
+        mat = fitz.Matrix(zoom, zoom)
+        
+        for i in range(len(doc)):
+            page = doc.load_page(i)
+            pix = page.get_pixmap(matrix=mat, colorspace=fitz.csRGB)
+            
+            output_path = os.path.join(output_dir, f"page-{i+1}.jpg")
+            # In newer PyMuPDF, save() doesn't take quality. Use tobytes instead.
+            img_bytes = pix.tobytes("jpg", jpg_quality=quality)
+            with open(output_path, "wb") as f:
+                f.write(img_bytes)
+            
+            images.append({
+                "path": output_path,
+                "pageIndex": i + 1,
+                "size": os.path.getsize(output_path)
+            })
+            
+        doc.close()
+        return {
+            "success": True,
+            "images": images,
+            "totalPages": len(images)
+        }
+    except Exception as e:
+        return {
+            "success": False,
+            "error": str(e)
+        }
+
+if __name__ == "__main__":
+    if len(sys.argv) < 3:
+        print(json.dumps({"success": False, "error": "Usage: python pdf_to_images.py <pdf_path> <output_dir> [zoom] [quality]"}))
+        sys.exit(1)
+        
+    pdf_path = sys.argv[1]
+    output_dir = sys.argv[2]
+    zoom = float(sys.argv[3]) if len(sys.argv) > 3 else 2.0
+    quality = int(sys.argv[4]) if len(sys.argv) > 4 else 85
+    
+    result = convert_pdf_to_images(pdf_path, output_dir, zoom, quality)
+    print(json.dumps(result))