Use Hint classes for hints from the last commit

Also move the language-specific hint method for Prolog to prolog.common.

1 files changed, 21 insertions, 0 deletions

diff --git a/prolog/common.py b/prolog/common.py
new file mode 100644
index 0000000..afba98f
--- /dev/null
+++ b/prolog/common.py
@@ -0,0 +1,21 @@
+# coding=utf-8
+
+import operator
+import prolog.engine
+from server.hints import Hint, HintSequence
+
+hint_defs = {
+    'no_hint': HintSequence('no_hint', 4),
+    'test_results': Hint('test_results'),
+    'syntax_error': Hint('syntax_error'),
+}
+
+def hint(program):
+    # Check program for syntax errors.
+    engine_id, output = prolog.engine.create(code=program)
+    if engine_id is not None:
+        prolog.engine.destroy(engine_id)
+    if 'error' in map(operator.itemgetter(0), output):
+        errors_msg = '\n'.join(['{}: {}'.format(m_type, m_text) for m_type, m_text in output])
+        return [{'id': 'syntax_error', 'args': {'messages': errors_msg}}]
+    return []