forked from cadence/breezewiki
235 lines
12 KiB
Racket
235 lines
12 KiB
Racket
#lang racket/base
|
|
(require racket/dict
|
|
racket/function
|
|
racket/list
|
|
racket/string
|
|
; libs
|
|
(prefix-in easy: net/http-easy)
|
|
; html libs
|
|
html-parsing
|
|
html-writing
|
|
; web server libs
|
|
net/url
|
|
web-server/http
|
|
web-server/dispatchers/dispatch
|
|
; my libs
|
|
"pure-utils.rkt"
|
|
"xexpr-utils.rkt"
|
|
"url-utils.rkt"
|
|
"application-globals.rkt")
|
|
|
|
(provide
|
|
page-wiki)
|
|
|
|
(module+ test
|
|
(require rackunit)
|
|
(define wiki-document
|
|
'(*TOP*
|
|
(div (@ (class "mw-parser-output"))
|
|
(aside (@ (role "region") (class "portable-infobox pi-theme-wikia pi-layout-default"))
|
|
(h2 (@ (class "pi-item pi-title") (data-source "title"))
|
|
"Infobox Title")
|
|
(figure (@ (class "pi-item pi-image") (data-sourec "image"))
|
|
(a (@ (href "https://static.wiki.nocookie.net/nice-image.png") (class "image image-thumbnail") (title ""))
|
|
(img (@ (src "https://static.wiki.nocookie.net/nice-image-thumbnail.png") (class "pi-image-thumbnail")))))
|
|
(div (@ (class "pi-item pi-data") (data-source "description"))
|
|
(h3 (@ (class "pi-data-label"))
|
|
"Description")
|
|
(div (@ (class "pi-data-value"))
|
|
"Mystery infobox!")))
|
|
(div (@ (data-test-collapsesection) (class "collapsible collapsetoggle-inline collapsed"))
|
|
(i (b "This section is hidden for dramatic effect."))
|
|
(div (@ (class "collapsible-content"))
|
|
(p "Another page link: "
|
|
(a (@ (data-test-wikilink) (href "https://test.fandom.com/wiki/Another_Page") (title "Another Page"))
|
|
"Another Page"))))))))
|
|
|
|
(define (preprocess-html-wiki html)
|
|
(define (rr* find replace contents)
|
|
(regexp-replace* find contents replace))
|
|
((compose1
|
|
; fix navbox list nesting
|
|
; navbox on right of page has incorrect html "<td ...><li>" and the xexpr parser puts the <li> much further up the tree
|
|
; add a <ul> to make the parser happy
|
|
; usage: /fallout/wiki/Fallout:_New_Vegas_achievements_and_trophies
|
|
(curry rr* #rx"(<td[^>]*>\n?)(<li>)" "\\1<ul>\\2")
|
|
; change <figcaption><p> to <figcaption><span> to make the parser happy
|
|
(curry rr* #rx"(<figcaption[^>]*>)[ \t]*<p class=\"caption\">([^<]*)</p>" "\\1<span class=\"caption\">\\2</span>"))
|
|
html))
|
|
(module+ test
|
|
(check-equal? (preprocess-html-wiki "<td class=\"va-navbox-column\" style=\"width: 33%\">\n<li>Hey</li>")
|
|
"<td class=\"va-navbox-column\" style=\"width: 33%\">\n<ul><li>Hey</li>")
|
|
(check-equal? (preprocess-html-wiki "<figure class=\"thumb tright\" style=\"width: 150px\"><a class=\"image\"><img></a><noscript><a><img></a></noscript><figcaption class=\"thumbcaption\"> <p class=\"caption\">Caption text.</p></figcaption></figure>")
|
|
"<figure class=\"thumb tright\" style=\"width: 150px\"><a class=\"image\"><img></a><noscript><a><img></a></noscript><figcaption class=\"thumbcaption\"><span class=\"caption\">Caption text.</span></figcaption></figure>"))
|
|
|
|
(define (update-tree-wiki tree wikiname)
|
|
(update-tree
|
|
(λ (element element-type attributes children)
|
|
;; replace whole element?
|
|
(cond
|
|
; wrap tables in a div.table-scroller
|
|
[(and (eq? element-type 'table)
|
|
(has-class? "wikitable" attributes)
|
|
(not (dict-has-key? attributes 'data-scrolling)))
|
|
`(div
|
|
((class "table-scroller"))
|
|
((,element-type (@ (data-scrolling) ,@attributes)
|
|
,@children)))]
|
|
; exclude empty figcaptions
|
|
[(and (eq? element-type 'figcaption)
|
|
(or (eq? (length (filter element-is-element? children)) 0)
|
|
((query-selector (λ (element-type attributes children)
|
|
(eq? element-type 'use))
|
|
element))))
|
|
return-no-element]
|
|
; exclude infobox items that are videos, and gallery items that are videos
|
|
[(and (or (has-class? "pi-item" attributes)
|
|
(has-class? "wikia-gallery-item" attributes))
|
|
((query-selector (λ (element-type attributes children)
|
|
(has-class? "video-thumbnail" attributes))
|
|
element)))
|
|
return-no-element]
|
|
; exclude the invisible brackets after headings
|
|
[(and (eq? element-type 'span)
|
|
(has-class? "mw-editsection" attributes))
|
|
return-no-element]
|
|
; display a link instead of an iframe
|
|
[(eq? element-type 'iframe)
|
|
(let ([src (car (dict-ref attributes 'src null))])
|
|
`(a
|
|
((class "iframe-alternative") (href ,src))
|
|
(,(format "Embedded media: ~a" src))))]
|
|
[#t
|
|
(list element-type
|
|
;; attributes
|
|
((compose1
|
|
; uncollapsing
|
|
(curry attribute-maybe-update 'class
|
|
(λ (class)
|
|
(string-join
|
|
((compose1
|
|
; uncollapse all navbox items (bottom of page mass navigation)
|
|
(curry u
|
|
(λ (classlist) (and (eq? element-type 'table)
|
|
(member "navbox" classlist)
|
|
(member "collapsed" classlist)))
|
|
(λ (classlist) (filter (curry (negate equal?) "collapsed") classlist)))
|
|
; uncollapse portable-infobox sections
|
|
(curry u
|
|
(λ (classlist) (and (eq? element-type 'section)
|
|
(member "pi-collapse" classlist)))
|
|
(λ (classlist) (filter (λ (v)
|
|
(and (not (equal? v "pi-collapse-closed"))
|
|
(not (equal? v "pi-collapse"))))
|
|
classlist)))
|
|
; generic: includes article sections and tables, probably more
|
|
(curry u
|
|
(λ (classlist) (and (member "collapsible" classlist)
|
|
(member "collapsed" classlist)))
|
|
(λ (classlist) (filter (curry (negate equal?) "collapsed") classlist))))
|
|
(string-split class " "))
|
|
" ")))
|
|
; change links to stay on the same wiki
|
|
(curry attribute-maybe-update 'href
|
|
(λ (href)
|
|
((compose1
|
|
(λ (href) (regexp-replace #rx"^(/wiki/.*)" href (format "/~a\\1" wikiname)))
|
|
(λ (href) (regexp-replace #rx"^https://([a-z-]+).fandom.com(/wiki/.*)" href "/\\1\\2")))
|
|
href)))
|
|
; add noreferrer to a.image
|
|
(curry u
|
|
(λ (v) (and (eq? element-type 'a)
|
|
(has-class? "image" v)))
|
|
(λ (v) (dict-update attributes 'rel (λ (s)
|
|
(list (string-append (car s) " noreferrer")))
|
|
'(""))))
|
|
; proxy images from inline styles
|
|
(curry attribute-maybe-update 'style
|
|
(λ (style)
|
|
(regexp-replace #rx"url\\(['\"]?(.*?)['\"]?\\)" style
|
|
(λ (whole url)
|
|
(string-append
|
|
"url("
|
|
(u-proxy-url url)
|
|
")")))))
|
|
; proxy images from src attributes
|
|
(curry attribute-maybe-update 'src u-proxy-url)
|
|
; don't lazyload images
|
|
(curry u
|
|
(λ (v) (dict-has-key? v 'data-src))
|
|
(λ (v) (attribute-maybe-update 'src (λ (_) (car (dict-ref v 'data-src))) v)))
|
|
; don't use srcset - TODO: use srcset?
|
|
(λ (v) (dict-remove v 'srcset)))
|
|
attributes)
|
|
;; children
|
|
((compose1
|
|
; wrap blinking animated images in a slot so they can be animated with CSS
|
|
(curry u
|
|
(λ (v) (and (has-class? "animated" attributes)
|
|
((length v) . > . 1)))
|
|
(λ (v)
|
|
`((span (@ (class "animated-slot") (style ,(format "--steps: ~a" (length v))))
|
|
,@v)))))
|
|
children))]))
|
|
tree))
|
|
(module+ test
|
|
(define transformed (update-tree-wiki wiki-document "test"))
|
|
; check that wikilinks are changed to be local
|
|
(check-equal? (get-attribute 'href (bits->attributes
|
|
((query-selector
|
|
(λ (t a c) (dict-has-key? a 'data-test-wikilink))
|
|
transformed))))
|
|
"/test/wiki/Another_Page")
|
|
; check that a.image has noreferrer
|
|
(check-equal? (get-attribute 'rel (bits->attributes
|
|
((query-selector
|
|
(λ (t a c) (and (eq? t 'a)
|
|
(has-class? "image" a)))
|
|
transformed))))
|
|
" noreferrer")
|
|
; check that article collapse sections become uncollapsed
|
|
(check-equal? (get-attribute 'class (bits->attributes
|
|
((query-selector
|
|
(λ (t a c) (dict-has-key? a 'data-test-collapsesection))
|
|
transformed))))
|
|
"collapsible collapsetoggle-inline"))
|
|
|
|
(define (page-wiki req)
|
|
(define wikiname (path/param-path (first (url-path (request-uri req)))))
|
|
(define origin (format "https://~a.fandom.com" wikiname))
|
|
(define path (string-join (map path/param-path (cddr (url-path (request-uri req)))) "/"))
|
|
(define source-url (format "https://~a.fandom.com/wiki/~a" wikiname path))
|
|
|
|
(define dest-url (format "~a/api.php?~a"
|
|
origin
|
|
(params->query `(("action" . "parse")
|
|
("page" . ,path)
|
|
("prop" . "text")
|
|
("formatversion" . "2")
|
|
("format" . "json")))))
|
|
(printf "out: ~a~n" dest-url)
|
|
(define dest-res (easy:get dest-url #:timeouts timeouts))
|
|
|
|
(cond
|
|
[(eq? 200 (easy:response-status-code dest-res))
|
|
(let* ([data (easy:response-json dest-res)]
|
|
[title (jp "/parse/title" data "")]
|
|
[page-html (jp "/parse/text" data "")]
|
|
[page-html (preprocess-html-wiki page-html)]
|
|
[page (html->xexp page-html)])
|
|
(if (equal? "missingtitle" (jp "/error/code" data #f))
|
|
(next-dispatcher)
|
|
(response-handler
|
|
(define body
|
|
(generate-wiki-page source-url wikiname title (update-tree-wiki page wikiname)))
|
|
(define redirect-msg ((query-selector (attribute-selector 'class "redirectMsg") body)))
|
|
(response/output
|
|
#:code 200
|
|
#:headers (if redirect-msg
|
|
(let* ([dest (get-attribute 'href (bits->attributes ((query-selector (λ (t a c) (eq? t 'a)) redirect-msg))))]
|
|
[value (bytes-append #"0;url=" (string->bytes/utf-8 dest))])
|
|
(list (header #"Refresh" value)))
|
|
(list))
|
|
(λ (out)
|
|
(write-html body out))))))]))
|