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#lang racket/base
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(require racket/list racket/contract racket/rerequire racket/file racket/format xml racket/match racket/set racket/string racket/promise racket/path)
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(require web-server/http/xexpr web-server/dispatchers/dispatch)
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(require net/url)
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(require web-server/http/request-structs)
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(require web-server/http/response-structs)
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(require 2htdp/image)
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(require "world.rkt" "render.rkt" sugar txexpr "file.rkt" "debug.rkt" "pagetree.rkt" "cache.rkt")
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(module+ test (require rackunit))
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;;; Routes for the server module
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;;; separated out for ease of testing
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;;; because it's tedious to start the server just to check a route.
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(provide route-dashboard route-xexpr route-default route-404 route-in route-out)
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(define (response/xexpr+doctype xexpr)
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(response/xexpr #:preamble #"<!DOCTYPE html>" xexpr))
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(define (body-wrapper content-xexpr #:title [title #f])
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`(html
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(head
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(title ,(if title title "Pollen"))
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(meta ([charset "UTF-8"]))
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(link ([rel "stylesheet"]
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[type "text/css"]
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[href ,(format "/~a" (world:current-dashboard-css))])))
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(body
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,content-xexpr (div ((id "pollen-logo"))))))
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;; to make dummy requests for debugging
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(define/contract (string->request u)
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(string? . -> . request?)
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(make-request #"GET" (string->url u) empty
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(delay empty) #f "1.2.3.4" 80 "4.3.2.1"))
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;; print message to console about a request
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(define/contract (logger req)
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(request? . -> . void?)
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(define client (request-client-ip req))
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(define localhost-client "::1")
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(define url-string (url->string (request-uri req)))
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(message "request:" (string-replace url-string (world:current-default-pagetree) " dashboard")
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(if (not (equal? client localhost-client)) (format "from ~a" client) "")))
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;; pass string args to route, then
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;; package route into right format for web server
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;; todo: fix inbound contrfact to be proc with (path? . -> . xexpr?)
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;; todo: fix outbound contract to be proc with (request? #:rest args . -> . response?)
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(define/contract (route-wrapper route-proc)
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(procedure? . -> . procedure?)
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(λ(req . string-args)
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(logger req)
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(define path (apply build-path (world:current-project-root) (flatten string-args)))
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(response/xexpr+doctype (route-proc path))))
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;; extract main xexpr from a path
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(define/contract (file->xexpr path #:render [wants-render #t])
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((complete-path?) (#:render boolean?) . ->* . txexpr?)
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(when wants-render (render-from-source-or-output-path path))
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(dynamic-rerequire path) ; stores module mod date; reloads if it's changed
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(dynamic-require path (world:current-main-export)))
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;; todo: rewrite this test, obsolete since filename convention changed
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;;(module+ test
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;; (check-equal? (file->xexpr (build-path (current-directory) "tests/server-routes/foo.p") #:render #f) '(root "\n" "foo")))
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;; read contents of file to string
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;; just file->string with a render option
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(define/contract (slurp path #:render [wants-render #t])
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((complete-path?) (#:render boolean?) . ->* . string?)
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(when wants-render (render-from-source-or-output-path path))
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(file->string path))
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;; add a wrapper to txexpr that displays it as monospaced text
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;; for "view source"ish functions
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;; takes either a string or an xexpr
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(define/contract (format-as-code x)
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(xexpr? . -> . txexpr?)
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(body-wrapper `(tt ,x)))
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(define (handle-image-path p)
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(pathish? . -> . xexpr?)
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(define path (->complete-path p))
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(define img (bitmap/file path))
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(define relative-path (->string (find-relative-path (world:current-project-root) path)))
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(define img-url (format "/~a" relative-path))
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`(div
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(p "filename =" ,(->string relative-path))
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(p "size = " ,(bytecount->string (file-size path)))
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,@(when/splice (not (equal? (get-ext path) "svg"))
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`(p "width = " ,(->string (image-width img)) " "
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"height = " ,(->string (image-height img))))
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(a ((href ,img-url)) (img ((style "width:100%;border:1px solid #eee")(src ,img-url))))))
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(require file/unzip)
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(define (handle-zip-path p)
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(pathish? . -> . xexpr?)
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(define path (->path p))
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(define relative-path (->string (find-relative-path (world:current-project-root) path)))
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(define ziplist (zip-directory-entries (read-zip-directory path)))
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`(div
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(p "filename =" ,(->string relative-path))
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(p "size = " ,(bytecount->string (file-size path)))
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(ul ,@(map (λ(i) `(li ,(~a i))) ziplist))))
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(define/contract (make-binary-info-page p)
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(pathish? . -> . xexpr?)
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(define path (->complete-path p))
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(cond
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[((get-ext path) . in? . '("gif" "jpg" "jpeg" "png" "svg"))
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(handle-image-path path)]
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[((get-ext path) . in? . '("zip")) (handle-zip-path path)]
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[else '(p "We got some other kind of binary file.")]))
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;; server routes
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;; these all produce an xexpr, which is handled upstream by response/xexpr
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;; server routes that show result, formatted as code
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;; route-in just gets file from disk; route-out renders it first
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(define/contract (in path)
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(complete-path? . -> . xexpr?)
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(format-as-code (slurp path #:render #f)))
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(define route-in (route-wrapper in))
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(define/contract (out path)
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(complete-path? . -> . xexpr?)
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(cond
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[(or (has-binary-ext? path) (sourceish? path)) (make-binary-info-page path)]
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[else (format-as-code (slurp path #:render #t))]))
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(define route-out (route-wrapper out))
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;; dashboard route
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(define (dashboard dashboard-ptree)
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(define dashboard-dir (get-enclosing-dir dashboard-ptree))
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(define (in-project-root?)
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(directories-equal? dashboard-dir (world:current-project-root)))
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(define parent-dir (and (not (in-project-root?)) (get-enclosing-dir dashboard-dir)))
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(define empty-cell (cons #f #f))
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(define (make-link-cell href+text)
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(match-define (cons href text) href+text)
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(filter-not void? `(td ,(when text
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(if href
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`(a ((href ,href)) ,text)
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text)))))
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(define (make-parent-row)
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(define title (string-append "Project root" (if (equal? (world:current-project-root) dashboard-dir) (format " = ~a" dashboard-dir) "")))
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(define dirs (cons title (if (not (equal? (world:current-project-root) dashboard-dir))
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(explode-path (find-relative-path (world:current-project-root) dashboard-dir))
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null)))
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(define dirlinks (cons "/" (map (λ(ps) (format "/~a/" (apply build-path ps)))
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(for/list ([i (in-range (length (cdr dirs)))])
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(take (cdr dirs) (add1 i))))))
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`(tr (th ((colspan "3")) ,@(add-between (map (λ(dir dirlink) `(a ((href ,(format "~a~a" dirlink (world:current-default-pagetree)))) ,(->string dir))) dirs dirlinks) "/"))))
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(define (make-path-row filename-path)
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(define filename (->string filename-path))
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(define possible-source (->source-path (build-path dashboard-dir filename-path)))
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(define source (and possible-source (->string (find-relative-path dashboard-dir possible-source))))
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`(tr ,@(map make-link-cell
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(append (list
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(cond ; main cell
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[(directory-exists? (build-path dashboard-dir filename)) ; links subdir to its dashboard
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(cons (format "~a/~a" filename (world:current-default-pagetree)) (format "~a/" filename))]
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[(and source (equal? (get-ext source) "scrbl"))
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(cons #f `(a ((href ,filename)) ,filename (span ((class "file-ext")) " (from " ,(->string (find-relative-path dashboard-dir source)) ")")))]
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;; use remove-ext because source may have escaped extension in it
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[source (cons #f `(a ((href ,filename)) ,(->string (remove-ext source)) (span ((class "file-ext")) "." ,(get-ext source))))]
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[else (cons filename filename)])
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(cond ; in cell
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[source (cons (format "in/~a" source) "in")]
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[(or (pagetree-source? filename) (sourceish? filename)) (cons (format "in/~a" filename) "in")]
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[else empty-cell])
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(cond ; out cell
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[(directory-exists? (build-path dashboard-dir filename)) (cons #f #f)]
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[(pagetree-source? filename) empty-cell]
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[else (cons (format "out/~a" filename) "out")]))))))
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(define (ineligible-path? x) (member x (world:current-paths-excluded-from-dashboard)))
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(define project-paths
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(filter-not ineligible-path? (map ->path (pagetree->list
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(if (file-exists? dashboard-ptree)
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(cached-require (->path dashboard-ptree) (world:current-main-export))
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(directory->pagetree dashboard-dir))))))
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(body-wrapper #:title (format "~a" dashboard-dir)
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`(table
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,@(cons (make-parent-row)
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(if (not (null? project-paths))
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(map make-path-row project-paths)
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(list '(tr (td ((class "no-files")) "No files yet in this directory") (td) (td))))))))
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(define route-dashboard (route-wrapper dashboard))
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(define (get-query-value url key)
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; query is parsed as list of pairs, key is symbol, value is string
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; '((key . "value") ... )
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(let ([result (memf (λ(x) (equal? (car x) key)) (url-query url))])
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(and result (cdar result))))
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(define/contract (req->path req)
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(request? . -> . path?)
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(define base (world:current-project-root))
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(define file (url->path (request-uri req)))
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(if (eq? (system-path-convention-type) 'windows)
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(build-path base file) ; because url->path returns a relative path for 'windows
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(reroot-path file base))) ; and a complete path for 'unix
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;; default route
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(define (route-default req)
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(logger req)
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(define force (->boolean (get-query-value (request-uri req) 'force)))
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(render-from-source-or-output-path (req->path req) #:force force)
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(next-dispatcher))
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;; 404 route
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(define/contract (route-404 req)
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(request? . -> . response?)
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(define error-text (format "route-404: Can't find ~a" (->string (req->path req))))
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(message error-text)
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(response/xexpr+doctype `(html ,error-text)))
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;; server route that returns xexpr (before conversion to html)
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(define/contract (xexpr path)
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(complete-path? . -> . xexpr?)
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(format-as-code (~v (file->xexpr path))))
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(define route-xexpr (route-wrapper xexpr))
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