api: include load url in tracking code lookup API response (#21859)

help/fr/api-get.page

@@ -477,7 +477,9 @@ Une API existe pour déterminer l'existence d'un code de suivi et, le cas
 <screen>
 <output style="prompt">$ </output><input>curl -H "Accept: application/json" \
        https://www.example.net/api/code/QRFPTSLR</input>
-<output>{"url": "http://www.example.net/demarche/23", "err": 0}</output>
+<output>{"url": "http://www.example.net/demarche/23",
+ "load_url": "http://www.example.net/code/QRFPTSLR/load",
+ "err": 0}</output>
 </screen>
 
 <p>

tests/test_api.py

@@ -1988,6 +1988,7 @@ def test_tracking_code(pub):
     resp = get_app(pub).get(sign_url('/api/code/%s?orig=coucou' % code.id, '1234'), status=200)
     assert resp.json['err'] == 0
     assert resp.json['url'] == 'http://example.net/test/%s' % formdata.id
+    assert resp.json['load_url'] == 'http://example.net/code/%s/load' % code.id
 
     formdef.enable_tracking_codes = False
     formdef.store()

wcs/api.py

@@ -657,7 +657,11 @@ class ApiTrackingCodeDirectory(Directory):
             raise TraversalError()
         if formdata.formdef.enable_tracking_codes is False:
             raise TraversalError()
-        data = {'err': 0, 'url': formdata.get_url().rstrip('/')}
+        data = {
+            'err': 0,
+            'url': formdata.get_url().rstrip('/'),
+            'load_url': get_publisher().get_frontoffice_url() + '/code/%s/load' % component,
+        }
         return json.dumps(data)