Therapeutic Refactoring
summary
A 300‑line module with one huge method, no tests, running on a Cron job and manipulating temp files, FTP and EXIF data for JPEGs gets safety and clarity by adding characterization tests that capture real inputs and outputs, then applying replace method with method object and many small extractions (about 30 steps shown in a GitHub commit history). The refactor removes code junk, converts string-smushing to joined pieces, preserves behavior under tests, and produces fast, isolatable feedback that prevents panic.
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