Issue webcompat#3140 - Adds a method to extract the public issue number

We need the number to patch the issue at the right place.

tests/unit/test_webhook.py

@@ -555,6 +555,11 @@ def test_private_issue_moderated_ok(self, mock_proxy):
             self.assertEqual(rv.status_code, 200)
             self.assertEqual(rv.content_type, 'text/plain')
 
+    def test_get_public_issue_number(self):
+        """Test the extraction of the issue number from the public_url."""
+        public_url = 'https://github.com/webcompat/webcompat-tests/issues/1'
+        self.assertEqual(helpers.get_public_issue_number(public_url), '1')
+
 
 if __name__ == '__main__':
     unittest.main()

webcompat/webhooks/helpers.py

@@ -168,6 +168,12 @@ def get_issue_info(payload):
     return issue_info
 
 
+def get_public_issue_number(public_url):
+    """Extract the issue number from the public url."""
+    public_number = public_url.strip().rsplit('/', 1)[1]
+    return public_number
+
+
 def get_issue_labels(issue_body):
     """Extract the list of labels from an issue body to be sent to GitHub."""
     labelslist = []