支持供应商简称维护和订单PDF下载命名

po_app/order_routes.py

@@ -1,6 +1,8 @@
 import hashlib
 import io
 import json
+import re
+import unicodedata
 from datetime import datetime
 
 from flask import abort, flash, redirect, render_template, request, send_file, url_for
@@ -24,6 +26,32 @@ def pdf_bytes(order):
     return buf.getvalue()
 
 
+def pdf_download_name(order):
+    # Use current master-data aliases without regenerating an approved PDF.
+    company = (order.supplier_name or '').strip()
+    matches = db.query(Supplier.short_name, Supplier.tax_no).filter(Supplier.name == company).all()
+    tax_no = (order.supplier_tax_no or '').strip()
+    if tax_no:
+        same_tax = [row for row in matches if (row.tax_no or '').strip() == tax_no]
+        if same_tax:
+            matches = same_tax
+    aliases = {(row.short_name or '').strip() or company for row in matches}
+    # Ambiguous duplicate names fall back to the company recorded on the order.
+    supplier = next(iter(aliases)) if len(aliases) == 1 else company
+
+    def part(value, fallback, limit):
+        value = ''.join(c for c in str(value or '') if not unicodedata.category(c).startswith('C'))
+        value = re.sub(r'[<>:"/\\|?*]', '_', value)
+        value = re.sub(r'\s+', ' ', value).strip(' .')
+        # Windows counts UTF-16 units; retain Chinese and bound the full filename.
+        value = value.encode('utf-16-le')[:limit * 2].decode('utf-16-le', errors='ignore').rstrip(' .')
+        return value or fallback
+
+    return '%s_%s_%s.pdf' % (part(order.doc_type_text, '订单', 32),
+                              part(order.order_no, '未编号', 64),
+                              part(supplier, '未填写供应商', 80))
+
+
 def register_order_routes(app):
     @app.route('/orders/new', methods=['GET', 'POST'])
     @login_required
@@ -254,7 +282,7 @@ def register_order_routes(app):
         else:
             data = pdf_bytes(order)
         response = send_file(io.BytesIO(data), mimetype='application/pdf', as_attachment=request.args.get('dl') == '1',
-                             download_name='%s %s.pdf' % (order.doc_type_text, order.order_no))
+                             download_name=pdf_download_name(order))
         response.headers['Cache-Control'] = 'private, no-store'
         return response