Refactor sql_analyser into multiple classes for simpler extension in the future

django_migration_linter/sql_analyser/utils.py

@@ -0,0 +1,55 @@
+# Copyright 2019 3YOURMIND GmbH
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+# http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import re
+from copy import deepcopy
+
+
+def find_error_dict_with_code(tests, code):
+    return next((test_dict for test_dict in tests if test_dict["code"] == code), None)
+
+
+def update_migration_tests(base_tests, specific_tests):
+    base_tests = deepcopy(base_tests)
+    for override_test in specific_tests:
+        migration_test_dict = find_error_dict_with_code(
+            base_tests, override_test["code"]
+        )
+
+        if migration_test_dict is None or not override_test["code"]:
+            migration_test_dict = {}
+            base_tests.append(migration_test_dict)
+
+        for key in override_test.keys():
+            migration_test_dict[key] = override_test[key]
+    return base_tests
+
+
+def build_error_dict(migration_test, sql_statement):
+    table_search = (
+        re.search("TABLE `([^`]*)`", sql_statement, re.IGNORECASE)
+        if isinstance(sql_statement, str)
+        else None
+    )
+    col_search = (
+        re.search("COLUMN `([^`]*)`", sql_statement, re.IGNORECASE)
+        if isinstance(sql_statement, str)
+        else None
+    )
+    return {
+        "err_msg": migration_test["err_msg"],
+        "code": migration_test["code"],
+        "table": table_search.group(1) if table_search else None,
+        "column": col_search.group(1) if col_search else None,
+    }