feat: wecomm support image link

printing/services.py

@@ -10,6 +10,7 @@ This module is intended for reusable business logic that may be called by:
 from __future__ import annotations
 
 from dataclasses import dataclass
+from urllib.parse import urlparse
 
 from django.conf import settings
 from django.utils import timezone
@@ -48,6 +49,26 @@ def _truncate_text(s: str, max_len: int) -> str:
     return s[: max(0, int(max_len) - 6)] + "...(截断)"
 
 
+def _is_http_url(s: str) -> bool:
+    """
+    Minimal URL check for markdown linkify.
+    Only treat http/https absolute URLs as linkable.
+    """
+    s = (s or "").strip()
+    if not s:
+        return False
+    try:
+        p = urlparse(s)
+    except Exception:
+        return False
+    return p.scheme in ("http", "https") and bool(p.netloc)
+
+
+def _escape_markdown_link_text(s: str) -> str:
+    # avoid breaking markdown link text
+    return (s or "").replace("[", r"\[").replace("]", r"\]")
+
+
 def render_process_params_markdown(*, params: dict, max_items: int = 60, max_value_len: int = 200) -> str:
     """
     Render process params as markdown lines.
@@ -61,7 +82,13 @@ def render_process_params_markdown(*, params: dict, max_items: int = 60, max_val
     for k in sorted(params.keys(), key=lambda x: str(x)):
         v = params.get(k)
         kk = _truncate_text(str(k), 80)
-        vv = _truncate_text(str(v), int(max_value_len))
+        v_str = "" if v is None else str(v)
+        v_href = v_str.strip()
+        if _is_http_url(v_href):
+            v_disp = _escape_markdown_link_text(_truncate_text(v_href, int(max_value_len)))
+            vv = f"[{v_disp}]({v_href})"
+        else:
+            vv = _truncate_text(v_str, int(max_value_len))
         items.append(f"- **{kk}**：{vv}")
 
     if len(items) > int(max_items):

printing/test_wecom_markdown.py

@@ -0,0 +1,23 @@
+from django.test import SimpleTestCase
+
+
+class WeComMarkdownRenderTest(SimpleTestCase):
+    def test_render_process_params_markdown_linkify_http_url(self):
+        from printing.services import render_process_params_markdown
+
+        md = render_process_params_markdown(
+            params={
+                "图片": "https://example.com/a.png",
+                "备注": "不是链接",
+            }
+        )
+
+        self.assertIn("- **图片**：[https://example.com/a.png](https://example.com/a.png)", md)
+        self.assertIn("- **备注**：不是链接", md)
+
+    def test_render_process_params_markdown_linkify_strips_whitespace(self):
+        from printing.services import render_process_params_markdown
+
+        md = render_process_params_markdown(params={"图片": "  https://example.com/a.png  "})
+        self.assertIn("[https://example.com/a.png](https://example.com/a.png)", md)
+