| """ |
| Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. |
| SPDX-License-Identifier: MIT-0 |
| """ |
|
|
| from __future__ import annotations |
|
|
| from typing import Any |
|
|
| from cfnlint.jsonschema import ValidationResult, Validator |
| from cfnlint.rules.functions._BaseFn import BaseFn |
|
|
|
|
| class Equals(BaseFn): |
| """Check Equals Condition Function Logic""" |
|
|
| id = "E8003" |
| shortdesc = "Check Fn::Equals structure for validity" |
| description = "Check Fn::Equals is a list of two elements" |
| source_url = "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-conditions.html#intrinsic-function-reference-conditions-equals" |
| tags = ["functions", "equals"] |
|
|
| def __init__(self) -> None: |
| super().__init__("Fn::Equals", ("boolean",)) |
| self.child_rules = { |
| "W8003": None, |
| } |
|
|
| def fn_equals( |
| self, validator: Validator, s: Any, instance: Any, schema: Any |
| ) -> ValidationResult: |
| errs = list(self.validate(validator, s, instance, schema)) |
| if errs: |
| yield from iter(errs) |
| return |
|
|
| child_rule = self.child_rules.get("W8003") |
| if child_rule and hasattr(child_rule, "equals_is_useful"): |
| yield from child_rule.equals_is_useful( |
| validator, s, instance.get("Fn::Equals", []), schema |
| ) |
|
|
| def schema(self, validator: Validator, instance: Any) -> dict[str, Any]: |
| return { |
| "type": "array", |
| "maxItems": 2, |
| "minItems": 2, |
| "fn_items": { |
| "functions": [ |
| "Ref", |
| "Fn::FindInMap", |
| "Fn::Sub", |
| "Fn::Join", |
| "Fn::Select", |
| "Fn::Split", |
| "Fn::Length", |
| "Fn::ToJsonString", |
| ], |
| "schema": { |
| "type": ["string"], |
| }, |
| }, |
| } |
|
|
