* Fix `AST.tag` to downcase the tag name.
* Change PostQuery::Parser to use build nodes using `AST.tag`,
`AST.metatag`, `AST.wildcard`, etc methods instead of building nodes
directly. This way all the normalization happens in the node
constructor methods instead of in the parser.
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.
db6bb2ccac