def _get_conditions_from_path()

in src/cfnlint/template.py [0:0]

• 37 lines of code
• 21 McCabe index (conditional complexity)

    def _get_conditions_from_path(self, text, path, include_if_in_function=True, only_last=False):
        """
            Get the conditions and their True/False value for the path provided
            Input:
                text: The object to start processing through the Path
                path: The path to recursively look for
            Output:
                An Object with keys being the Condition Names and the values are what
                    if its in the True or False part of the path.
                    {'condition': {True}}
        """
        LOGGER.debug('Get conditions for path %s', path)
        results = {}

        def get_condition_name(value, num=None):
            """Test conditions for validity before providing the name"""
            con_path = set()
            if num == 1:
                con_path.add(True)
            elif num == 2:
                con_path.add(False)
            else:
                con_path = con_path.union((True, False))

            if value:
                if isinstance(value, list):
                    if len(value) == 3:
                        if not results.get(value[0]):
                            results[value[0]] = set()
                        results[value[0]] = results[value[0]].union(con_path)

        try:
            # Found a condition at the root of the Path
            if path[0] == 'Fn::If' and ((len(path) == 1 and only_last) or not only_last):
                condition = text.get('Fn::If')
                if len(path) > 1:
                    if path[1] in [1, 2]:
                        get_condition_name(condition, path[1])
                else:
                    get_condition_name(condition)
            # Iterate if the Path has more than one value
            if len(path) > 1:
                if (path[0] in cfnlint.helpers.FUNCTIONS and path[0] != 'Fn::If') and not include_if_in_function:
                    return results
                child_results = self._get_conditions_from_path(
                    text[path[0]], path[1:], include_if_in_function, only_last)
                for c_r_k, c_r_v in child_results.items():
                    if not results.get(c_r_k):
                        results[c_r_k] = set()
                    results[c_r_k] = results[c_r_k].union(c_r_v)

        except KeyError as _:
            pass

        return results