feat(douyu): 支持批量导出用户名

tests/test_douyu_collab_orders.py

@@ -9,6 +9,7 @@ from web.backend.schemas import (
     DouyuCollabAccountLookupOut,
     DouyuCollabCkExportOut,
     DouyuCollabOrderOut,
+    DouyuCollabUsernameExportOut,
 )
 from web.backend.services import douyu_collab_service as collab
 
@@ -501,6 +502,62 @@ class TestDouyuCollabOrders:
             collab_api.copy_external_order_ck(order.id, self.session, operator)
         assert excinfo.value.status_code == 403
 
+    def test_export_usernames_dedupes_and_skips_empty(self):
+        first = collab.create_order(
+            self.session,
+            self.admin,
+            order_no="DY-USER-1",
+            account_username="douyu-account-a",
+            draft=True,
+        )
+        second = collab.create_order(
+            self.session,
+            self.admin,
+            order_no="DY-USER-2",
+            account_username="douyu-account-a",
+            draft=True,
+        )
+        blank = collab.create_order(
+            self.session,
+            self.admin,
+            order_no="DY-USER-3",
+            draft=True,
+        )
+
+        result = collab.export_usernames(
+            self.session,
+            [first.id, second.id, blank.id],
+        )
+
+        assert result["total"] == 3
+        assert result["exported"] == 2
+        assert result["unique"] == 1
+        assert result["usernames"] == ["douyu-account-a"]
+        assert [item["order_no"] for item in result["items"]] == [
+            "DY-USER-1",
+            "DY-USER-2",
+        ]
+        assert result["skipped"] == [
+            {
+                "id": blank.id,
+                "order_no": "DY-USER-3",
+                "reason": "这单还没填斗鱼用户名",
+            }
+        ]
+        DouyuCollabUsernameExportOut.model_validate(result)
+
+    def test_export_usernames_rejects_empty_and_too_many(self):
+        with pytest.raises(collab.CollabError) as excinfo:
+            collab.export_usernames(self.session, [])
+        assert excinfo.value.code == "username_export_empty"
+
+        with pytest.raises(collab.CollabError) as excinfo:
+            collab.export_usernames(
+                self.session,
+                list(range(1, collab.USERNAME_EXPORT_BATCH_MAX + 2)),
+            )
+        assert excinfo.value.code == "username_export_too_large"
+
     def test_ck_export_permission_defaults_to_operation(self):
         from web.backend.permissions import ROLE_PERMISSIONS
 
@@ -519,6 +576,7 @@ class TestDouyuCollabOrders:
         assert "/api/douyu/external-orders/accounts/lookup" in paths
         assert "/api/douyu/external-orders/ck/export" in paths
         assert "/api/douyu/external-orders/{order_id}/ck/copy" in paths
+        assert "/api/douyu/external-orders/usernames/export" in paths
         assert "/api/douyu/collab-shops/{shop_id}" in paths
         assert "put" in paths["/api/douyu/collab-shops/{shop_id}"]
         assert "delete" in paths["/api/douyu/collab-shops/{shop_id}"]