feat: auto-convert URL to QR code in PDF export and preview

app/routes/plans.py

@@ -832,6 +832,29 @@ def preview_report(plan_id):
     # Markdown 转 HTML
     html_content = markdown.markdown(rendered, extensions=['tables', 'fenced_code'])
 
+    # URL 转二维码图片（预览用）
+    import re
+    import qrcode
+    import base64
+    from io import BytesIO
+
+    def make_qr_base64(url):
+        qr = qrcode.make(url, box_size=5)
+        buf = BytesIO()
+        qr.save(buf, format='PNG')
+        return base64.b64encode(buf.getvalue()).decode()
+
+    def replace_url_with_qr(match):
+        url = match.group(0)
+        try:
+            qr_b64 = make_qr_base64(url)
+            return f'<br><img src="data:image/png;base64,{qr_b64}" alt="QR" style="width:80px;display:block;margin:8px auto;">'
+        except:
+            return url
+
+    url_pattern = re.compile(r'https?://[^\s<>"{}|\\^`\[\]]+')
+    html_content = url_pattern.sub(replace_url_with_qr, html_content)
+
     # 支持 ReportLab <para alignment="center"> 语法，转为 HTML
     import re
     html_content = re.sub(

app/services/pdf_generator.py

@@ -53,6 +53,26 @@ try:
 except Exception as e:
     CHINESE_FONT_OK = False
 
+import re
+import qrcode
+from io import BytesIO
+from reportlab.platypus import Image as RLImage
+
+# URL 正则表达式
+URL_PATTERN = re.compile(r'https?://[^\s<>"{}|\\^`\[\]]+')
+
+def generate_qr_image(url, size=50*mm):
+    """生成二维码图片，返回 BytesIO 对象"""
+    qr = qrcode.make(url, box_size=10)
+    buf = BytesIO()
+    qr.save(buf, format='PNG')
+    buf.seek(0)
+    return buf
+
+def contains_url(text):
+    """检测文本是否包含 URL"""
+    return bool(URL_PATTERN.search(text))
+
 def md_to_xml(text):
     """将markdown转换为reportlab XML markup"""
     if not text:
@@ -169,9 +189,27 @@ class PianoPDF:
             self.elements.append(Paragraph(md_to_xml(text), self.heading_style))
 
     def add_paragraph(self, text):
-        if text:
+        if not text:
-            self.elements.append(Paragraph(md_to_xml(text), self.body_style))
+            return
-            self.elements.append(Spacer(1, 1*mm))
+
+        # 检测是否是纯 URL
+        url_match = URL_PATTERN.match(text.strip())
+        if url_match and url_match.group() == text.strip():
+            # 纯 URL，生成二维码
+            url = url_match.group()
+            try:
+                buf = generate_qr_image(url, 50*mm)
+                img = RLImage(buf, width=50*mm, height=50*mm)
+                img.hAlign = 'CENTER'
+                self.elements.append(img)
+                self.elements.append(Spacer(1, 2*mm))
+                return
+            except Exception as e:
+                # QR生成失败，回退到文字
+                pass
+
+        self.elements.append(Paragraph(md_to_xml(text), self.body_style))
+        self.elements.append(Spacer(1, 1*mm))
 
     def add_list(self, items):
         for item in items:

check_time.py

@@ -0,0 +1,7 @@
+from app import create_app, db
+from app.models import PracticePlan
+app = create_app()
+with app.app_context():
+    plans = PracticePlan.query.order_by(db.desc("created_at")).limit(3).all()
+    for p in plans:
+        print(f"ID:{p.id} | created_at:{p.created_at} | student:{p.student.name if p.student else 'N/A'}")

check_time_local.py

@@ -0,0 +1,9 @@
+from app import create_app, db
+from app.models import PracticePlan
+
+# Query local dev database (same data as production)
+app = create_app()
+with app.app_context():
+    plans = PracticePlan.query.order_by(db.desc("created_at")).limit(5).all()
+    for p in plans:
+        print(f"ID:{p.id} | created_at:{p.created_at} | student:{p.student.name if p.student else 'N/A'}")

requirements.txt

@@ -5,3 +5,5 @@ Jinja2==3.1.3
 requests==2.31.0
 gunicorn==23.0.0
 markdown>=3.4
+qrcode>=7.4
+Pillow>=10.0