At first we rounded loudness values to 4 decimal places to make them
easier to compare. This meant the lowest level was 0.0001, or -80 dB,
but it's possible for volume levels to go even lower than that.
This directory contains library code used through Danbooru. This includes things like defining API clients, dealing with
sources, parsing tag searches, storing and resizing images, and so on.
Many of the files here use the Service Object pattern. Instead of putting complex code in models or controllers, it goes
here, in plain old Ruby objects (POROs). This keeps models and controllers simpler, and keeps domain logic isolated and
independent from the database and the HTTP request cycle.
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