* 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.
Fixes this warning:
Calling `DidYouMean::SPELL_CHECKERS.merge!(error_name => spell_checker)' has been deprecated.
Please call `DidYouMean.correct_error(error_name, spell_checker)' instead.
Don't record unknown url params that don't come from our app. This
includes typos, url params from userscripts, and weird params from
broken bots, crawlers, or other unknown sources. Indexing too many
params can lead to a mapping explosion.
https://www.elastic.co/guide/en/elasticsearch/reference/current/mapping.html
Don't record most HTTP request and response headers in the APM, except
for the User-Agent, Referer, Save-Data, X-Forwarded-For, Accept-Language,
and Content-Type headers. Recording every HTTP header for every request
takes up a lot of space and most of them aren't very useful.
Eliminate an unnecessary `SELECT name, post_count, category FROM tags WHERE name IN (?)`
query on the post show page. This query was used by `humanized_essential_tag_string`
when generating the page title. This query was redundant because we already use
another query to load the tag list with `SELECT * FROM tags WHERE name IN (?)`.
Raise an error if the search is invalid for one of the following reasons:
* It contains multiple conflicting order: metatags (e.g. `order:score order:favcount` or `ordfav:a ordfav:b`).
* It contains a metatag that can't be used more than once: (e.g. `limit:5 limit:10`, `random:5 random:10`).
* It contains a metatag that can't be negated (e.g. `-order:score`, `-limit:20`, or `-random:20`).
* It contains a metatag that can't be used in an OR clause (e.g. ` touhou or order:score`, `touhou or limit:20`, `touhou or random:20`).
Fix queries like `(fate_(series) saber)` being parsed as `fate_(series` + `saber)`
instead of `fate_(series)` + `saber`.
This is pretty hacky. We assume that parentheses in tags are balanced.
So the rule is that trailing parentheses are part of the tag as long as
they're balanced, and not part of the tag if they're unbalanced.
Fix queries like `(~a ~b) (~c ~d)` being handled like `~a ~b ~c ~d`.
Caused by trimming AND nodes from the tree before rewriting the '~'
operator, which caused `~a` terms to be incorrectly lifted out of
subexpressions.
Switch to the post search engine using the new PostQuery parser. The new
engine fully supports AND, OR, and NOT operators and grouping expressions
with parentheses.
Highlights:
New OR operator:
* `skirt or dress` (same as `~skirt ~dress`)
Tags can be grouped with parentheses:
* `1girl (skirt or dress)`
* `(blonde_hair blue_eyes) or (red_hair green_eyes)`
* `~(blonde_hair blue_eyes) ~(red_hair green_eyes)` (same as above)
* `(pantyhose or thighhighs) (black_legwear or brown_legwear)`
* `(~pantyhose ~thighhighs) (~black_legwear ~brown_legwear)` (same as above)
Metatags can be OR'd together:
* `user:evazion or fav:evazion`
* `~user:evazion ~fav:evazion`
Wildcard tags can combined with either AND or OR:
* `black_* white_*` (find posts with at least one black_* tag AND one white_* tag)
* `black_* or white_*` (find posts with at least one black_* tag OR one white_* tag)
* `~black_* ~white_*` (same as above)
See 4c7cfc73 for more syntax examples.
Fixes#4949: And+or search?
Fixes#5056: Wildcard searches return unexpected results when combined with OR searches
Inline the page footer, news updates, the ban notice, and the user
verification notice into the default layout. This is a micro
optimization to reduce the number of spans reported to the APM.
