Use the badge description is the message string representation

Fixes: fedora-infra#8
Signed-off-by: Aurélien Bompard <[email protected]>

tahrir_messages/__init__.py

@@ -76,6 +76,9 @@ def agent_name(self):
     def summary(self):
         return f"{self.agent_name} was awarded the badge `{self.body['badge']['name']}`"
 
+    def __str__(self):
+        return self.body["badge"]["description"]
+
     badge_schema: typing.ClassVar = {
         "type": "object",
         "required": ["badge_id", "description", "image_url", "name"],
@@ -91,7 +94,7 @@ def summary(self):
     body_schema: typing.ClassVar = {
         "id": "http://fedoraproject.org/message-schema/tahrir",
         "$schema": "http://json-schema.org/draft-04/schema#",
-        "description": "The message sent when a user logs into tahrir for the first time",
+        "description": "The message sent when a badge is awarded",
         "type": "object",
         "required": ["user", "badge"],
         "properties": {

tests/test_messages.py

@@ -44,7 +44,7 @@ def test_badge_award():
     expected_summary = "dudemcpants was awarded the badge `White Hat`"
     assert message.topic == "badges.badge.award"
     assert message.summary == expected_summary
-    assert str(message) == expected_summary
+    assert str(message) == DUMMY_BADGE["description"]
     assert message.agent_name == "dudemcpants"
     assert message.usernames == ["dudemcpants"]
     assert message.app_name == "tahrir"