feat(virgool): add POST support and use user-existence API to bypass JS cookies

Co-authored-by: soxoj <31013580+soxoj@users.noreply.github.com>
Agent-Logs-Url: https://github.com/soxoj/maigret/sessions/e7f4ab84-917a-49fc-bfbd-9bbaf76027f8

tests/test_checking.py

@@ -67,3 +67,35 @@ async def test_checking_by_message_negative(httpserver, local_test_db):
 
     result = await search('unclaimed', site_dict=sites_dict, logger=Mock())
     assert result['Message']['status'].is_found() is True
+
+
+@pytest.mark.slow
+@pytest.mark.asyncio
+async def test_checking_by_post_message(httpserver, local_test_db):
+    sites_dict = local_test_db.sites_dict
+
+    import json
+
+    # Existing user: API responds with {"exists": true}
+    httpserver.expect_request(
+        '/api/check',
+        method='POST',
+        json={"username": "claimed", "type": "lookup"},
+    ).respond_with_data(
+        json.dumps({"exists": True}), content_type="application/json"
+    )
+
+    # Non-existing user: API responds with {"msg": "not found"}
+    httpserver.expect_request(
+        '/api/check',
+        method='POST',
+        json={"username": "unclaimed", "type": "lookup"},
+    ).respond_with_data(
+        json.dumps({"msg": "not found"}), content_type="application/json"
+    )
+
+    result = await search('claimed', site_dict=sites_dict, logger=Mock())
+    assert result['PostMessage']['status'].is_found() is True
+
+    result = await search('unclaimed', site_dict=sites_dict, logger=Mock())
+    assert result['PostMessage']['status'].is_found() is False