forked from cadence/breezewiki
125 lines
5.6 KiB
Racket
125 lines
5.6 KiB
Racket
#lang racket/base
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(require racket/list
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racket/match
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racket/string
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memo
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net/http-easy
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html-parsing
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"../lib/pure-utils.rkt"
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"../lib/syntax.rkt"
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"../lib/url-utils.rkt"
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"../lib/xexpr-utils.rkt")
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(provide
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get-redirect-content)
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(module+ test
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(require rackunit))
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;; fandom wikinames * Title * Main Page * Search page override * API endpoint override
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(define wikis
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'(((gallowmere) "MediEvil Wiki" "https://medievil.wiki/w/Main_Page" #f #f)
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((fallout) "Fallout Wiki" "https://fallout.wiki/wiki/Fallout_Wiki" #f "https://fallout.wiki/api.php")
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))
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(define wikis-hash (make-hash))
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(for ([w wikis])
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(for ([wikiname (car w)])
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(hash-set! wikis-hash (symbol->string wikiname) w)))
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(module+ test
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(check-equal? (cadr (hash-ref wikis-hash "gallowmere"))
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"Gallowmere Historia"))
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(define (parse-table table)
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(define rows (query-selector (λ (t a c) (eq? t 'tr)) table))
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(define header-row (rows))
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(define column-names
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(for/list ([th (in-producer (query-selector (λ (t a c) (eq? t 'th)) header-row) #f)])
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(string->symbol (string-downcase (string-trim (findf string? th))))))
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(define data-row (rows))
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(for/hasheq ([col-name column-names]
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[col-value (in-producer (query-selector (λ (t a c) (eq? t 'td)) data-row) #f)])
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(values col-name (filter element-is-content? (cdr col-value)))))
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(module+ test
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(check-equal? (parse-table (html->xexp "<table> <tbody><tr> <th>Links</th></tr> <tr> <td><a target=\"_blank\" rel=\"nofollow noreferrer noopener\" class=\"external text\" href=\"https://sirdanielfortesque.proboards.com/\">Forum</a></td></tr></tbody></table>"))
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'#hasheq((links . ((a (@ (target "_blank") (rel "nofollow noreferrer noopener") (class "external text") (href "https://sirdanielfortesque.proboards.com/")) "Forum"))))))
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(define (table->links table)
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(define v (hash-ref table 'links #f))
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(cond/var
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[(not v) (values null '("Data table must have a \"Links\" column"))]
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(var links (filter (λ (a) (and (pair? a) (eq? (car a) 'a))) v)) ; <a> elements
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[(null? links) (values null '("Links column must have at least one link"))]
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[#t (values links null)]))
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(define (table->logo table)
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(define logo (hash-ref table 'logo #f))
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(cond/var
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[(not logo) (values #f '("Data table must have a \"Logo\" column"))]
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[(null? logo) (values #f '("Logo table column must have a link"))]
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(var href (get-attribute 'href (bits->attributes (car (hash-ref table 'logo)))))
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[(not href) (values #f '("Logo table column must have a link"))]
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[#t (values href null)]))
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(define (get-api-endpoint wiki)
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(define main-page (third wiki))
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(define override (fifth wiki))
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(or override
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(match main-page
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[(regexp #rx"/$") (string-append main-page "api.php")]
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[(regexp #rx"^(.*)/wiki/" (list _ domain)) (string-append domain "/w/api.php")]
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[(regexp #rx"^(.*)/w/" (list _ domain)) (string-append domain "/api.php")]
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[_ (error 'get-api-endpoint "unknown url format: ~a" main-page)])))
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(define (get-search-page wiki)
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(define main-page (third wiki))
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(define override (fourth wiki))
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(or override
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(match main-page
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[(regexp #rx"/$") (string-append main-page "Special:Search")]
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[(regexp #rx"^(.*/w[^./]*/)" (list _ wiki-prefix)) (string-append wiki-prefix "Special:Search")]
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[_ (error 'get-search-page "unknown url format: ~a" main-page)])))
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(define/memoize (get-redirect-content wikiname) #:hash hash
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(define wiki (hash-ref wikis-hash wikiname #f))
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(cond
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[wiki
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(define display-name (cadr wiki))
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(define endpoint (string-append (get-api-endpoint wiki) "?action=parse&page=MediaWiki:BreezeWikiRedirect&prop=text&formatversion=2&format=json"))
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(define res (get endpoint))
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(define html (jp "/parse/text" (response-json res)))
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(define content ((query-selector (λ (t a c) (has-class? "mw-parser-output" a))
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(html->xexp html))))
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(define body (for/list ([p (in-producer (query-selector (λ (t a c) (eq? t 'p)) content) #f)]) p))
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(define table (parse-table ((query-selector (λ (t a c) (eq? t 'table)) content))))
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(define-values (links links-errors) (table->links table))
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(define-values (logo logo-errors) (table->logo table))
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(define construct-errors (append links-errors logo-errors))
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(λ (title)
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(define go
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(string-append (get-search-page wiki)
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"?"
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(params->query `(("search" . ,title)
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("go" . "Go")))))
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`(aside (@ (class "niwa__notice"))
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(h1 (@ (class "niwa__header")) ,display-name " has its own website separate from Fandom.")
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(div (@ (class "niwa__cols"))
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(div (@ (class "niwa__left"))
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(a (@ (class "niwa__go") (href ,go)) "Read " ,title " on " ,display-name " →")
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,@body
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(p "This wiki's core community has wholly migrated away from Fandom. You should "
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(a (@ (href ,go)) "go to " ,display-name " now!")))
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(div (@ (class "niwa__right"))
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(img (@ (class "niwa__logo") (src ,logo)))))
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,(if (pair? links)
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`(p (@ (class "niwa__feedback"))
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,@(add-between links " / "))
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"")
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,(if (pair? construct-errors)
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`(ul
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,@(for/list ([error construct-errors])
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`(li ,error)))
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"")))]
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[#t #f]))
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(module+ test
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((get-redirect-content "gallowmere") "Gallowmere Historia"))
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