1 files changed, 33 insertions, 0 deletions
diff --git a/ql/ast/checkers/question_checker.py b/ql/ast/checkers/question_checker.py
new file mode 100644
index 0000000..5b255d8
--- /dev/null
+++ b/ql/ast/checkers/question_checker.py
@@ -0,0 +1,33 @@
+class QuestionChecker:
+    def __init__(self, questions):
+        self.__errors = []
+        self.__warnings = []
+        self.__check_questions(questions)
+
+    @property
+    def errors(self):
+        return self.__errors
+
+    @property
+    def warnings(self):
+        return self.__warnings
+
+    def __check_questions(self, questions):
+        for question1 in questions:
+            for question2 in questions:
+                if question1 != question2:
+                    equal_labels = question1['label'] == question2['label']
+                    equal_identifiers = question1['identifier'] == question2['identifier']
+                    different_types = question1['answer_type'] != question2['answer_type']
+
+                    if all([equal_labels, equal_identifiers, different_types]):
+                        self.__errors.append('Duplicate questions with different types found on lines {} and {}'
+                                             .format(question1['metadata'].line, question2['metadata'].line))
+
+                    if equal_identifiers:
+                        self.__errors.append('Duplicate question identifiers found on lines {} and {}'
+                                             .format(question1['metadata'].line, question2['metadata'].line))
+
+                    if equal_labels:
+                        self.__warnings.append('Duplicate question labels found on lines {} and {}'
+                                               .format(question1['metadata'].line, question2['metadata'].line))