When processing an alias, rename, implication, mass update, or nuke,
update the posts in parallel. This means that if we alias foo to bar,
for example, then we use four processes at once to retag the posts from
foo to bar.
This doesn't mean that if we have two aliases in a BUR, we process both
aliases in parallel. It simply means that when processing an alias, we
update the posts in parallel for that alias.
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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