Changed parsing of submission code attribute

src/parser/xml_parser.rs

@@ -343,16 +343,17 @@ fn extract_submission_for_student(
         let mut val = el
             .attribute_value("value1")
             .expect("No value1 attr found, unable to parse code");
-        if val == "0" {
+        // TODO this seems rather brittle...
+        if val.len() == 1 {
             val = el
                 .attribute_value("value2")
-                .expect("value1 is 0 but value2 attr not found, unable to parse code");
+                .expect("value1 is only one long, but value2 attr not found, unable to parse code");
         }
         val
     });
 
     let code = match encoded_attr {
-        Some(val) => String::from_utf8(decode(val)?)?,
+        Some(val) => String::from_utf8(decode(val).expect(&format!("Unable to decode: {}", &val)))?,
         None => "".to_string(),
     };