franceconnect: return last known DGFiP data (#68720)

passerelle/apps/franceconnect_data/fc.py

@@ -177,6 +177,16 @@ class FranceConnect:
         data[annrev] = dgfip_ressource_ir_response
         self.add('dgfip_ressource_ir_response', data)
 
+    def request_dgfip_last_known_ir(self):
+        ir = {}
+        for year, response in self.dgfip_ressource_ir_response.items():
+            if response.get('error'):
+                continue
+            if ir.get('year', '0') < year:
+                ir = response
+                ir['year'] = year
+        self.add('dgfip_ressource_last_known_ir_response', ir)
+
     def __getattr__(self, name):
         try:
             return dict(self.items)[name]

passerelle/apps/franceconnect_data/models.py

@@ -186,7 +186,9 @@ class Resource(BaseResource):
                 current_year = now().year
                 for year in range(current_year - 3, current_year):
                     franceconnect.request_dgfip_ir(str(year), id_teleservice=self.dgfip_id_teleservice)
+                franceconnect.request_dgfip_last_known_ir()
                 token['dgfip_ir'] = franceconnect.dgfip_ressource_ir_response
+                token['dgfip_ir']['last_known'] = franceconnect.dgfip_ressource_last_known_ir_response
             try:
                 template = Template(self.text_template)
                 text_template_context = {

tests/test_franceconnect_data.py

@@ -59,7 +59,7 @@ DGFIP_MOCKED_RESPONSES = USER_INFO_MOCKED_RESPONSES + [
 DGFIP_MOCKED_RESPONSES += [
     [
         '/impotparticulier/1.0/situations/ir/assiettes/annrev/%s' % year,
-        {'rfr': 0, 'revenuBrutGlobal': 0},
+        {'rfr': year * 2, 'revenuBrutGlobal': year * 10},
     ]
     for year in range(CURRENT_YEAR - 3, CURRENT_YEAR)
 ]
@@ -165,3 +165,9 @@ def test_dgfip_mode(app, fc):
     assert data['dgfip_ir']
     for year in range(CURRENT_YEAR - 3, CURRENT_YEAR):
         assert data['dgfip_ir'][str(year)]
+    assert 'last_known' in data['dgfip_ir']
+    last_known_ir = data['dgfip_ir']['last_known']
+    past_year = CURRENT_YEAR - 1
+    assert last_known_ir['year'] == str(past_year)
+    assert last_known_ir['revenuBrutGlobal'] == past_year * 10
+    assert last_known_ir['rfr'] == past_year * 2