def get_conditions_scenarios_from_object()

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

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

    def get_conditions_scenarios_from_object(self, objs):
        """
            Get condition from objects
        """
        def get_conditions_from_property(value):
            """ Recursively get conditions """
            results = set()
            if isinstance(value, dict):
                if len(value) == 1:
                    for k, v in value.items():
                        if k == 'Fn::If':
                            if isinstance(v, list) and len(v) == 3:
                                if isinstance(v[0], six.string_types):
                                    results.add(v[0])
                                    results = results.union(get_conditions_from_property(v[1]))
                                    results = results.union(get_conditions_from_property(v[2]))
            elif isinstance(value, list):
                for v in value:
                    results = results.union(get_conditions_from_property(v))

            return results

        con = set()

        if isinstance(objs, dict):
            objs = [objs]

        for obj in objs:
            if isinstance(obj, dict):
                for k, v in obj.items():
                    # handle conditions directly under the object
                    if len(obj) == 1 and k == 'Fn::If' and len(v) == 3:
                        con.add(v[0])
                        for r_c in v[1:]:
                            if isinstance(r_c, dict):
                                for s_k, s_v in r_c.items():
                                    if s_k == 'Fn::If':
                                        con = con.union(get_conditions_from_property({s_k: s_v}))
                    else:
                        con = con.union(get_conditions_from_property(v))

        return self.conditions.get_scenarios(list(con))