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Refactoring externalcas plugin to improve readability and testability - #8
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Refactor the externalcas package to enhance code quality through better separation of concerns and improved testability while preserving all existing functionality. Changes: - Config caching: Parse and validate AcmeProxyConfig once instead of twice per request (eliminated duplicate unmarshaling bug) - Add config validation with Validate() method and timeout helpers (HTTPTimeout, RequestTimeout) - Extract validation functions: ValidateCreateCertificateRequest and ValidateRevokeCertificateRequest for independent testing - Make SplitCertificateBundle public to enable reuse and direct testing - Introduce ACMEClient interface with legoClientAdapter for dependency injection and mock-based testing - Add comprehensive unit tests for validation, config, and certificate processing with mock ACME client Benefits: - Config parsed once and cached (performance + bug fix) - All validation logic independently testable - Certificate processing testable without network calls - No breaking changes to public API or apiv1 interface - Plugin registration pattern preserved
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refactor(externalcas): enhance testability and fix config parsing
I used Claude Code to assist me with refactoring although I manually reviewed & tested all the proposed changes.