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#lang racket/base
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(require racket/list racket/contract racket/rerequire racket/file racket/format xml)
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(require (only-in net/url url-query url->path url->string))
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(require (only-in web-server/http/request-structs request-uri request-client-ip))
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(require "world.rkt" "render.rkt" "readability.rkt" "predicates.rkt" "debug.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 (all-defined-out))
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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?) . ->* . tagged-xexpr?)
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(when wants-render (render path))
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(dynamic-rerequire path) ; stores module mod date; reloads if it's changed
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(dynamic-require path 'main))
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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 path))
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(file->string path))
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(module+ test
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(check-equal? (slurp (build-path (current-directory) "tests/server-routes/bar.html") #:render #f) "<html><body><p>bar</p></body></html>"))
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;; add a wrapper to tagged-xexpr 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? . -> . tagged-xexpr?)
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`(div ((style "white-space:pre-wrap;font-family:AlixFB,monospaced")) ,x))
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(module+ test
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(check-equal? (format-as-code '(p "foo")) '(div ((style "white-space:pre-wrap;font-family:AlixFB,monospaced")) (p "foo"))))
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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 route that returns html
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;; todo: what is this for?
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(define/contract (route-html path)
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(complete-path? . -> . xexpr?)
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(file->xexpr path))
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;; server route that returns raw html, formatted as code
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;; for viewing source without using "view source"
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(define/contract (route-raw-html path)
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(complete-path? . -> . xexpr?)
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(format-as-code (slurp path #:render #f)))
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;; todo: consolidate with function above, they're the same.
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;; server route that shows contents of file on disk
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(define/contract (route-source path)
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(complete-path? . -> . xexpr?)
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(format-as-code (slurp path)))
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;; server route that returns xexpr (before conversion to html)
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(define/contract (route-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/contract (route-index)
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(-> xexpr?)
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;; This function generates the Pollen dashboard.
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;; First, generate some lists of files.
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;; get lists of files by mapping a filter function for each file type
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(define-values (pollen-files preproc-files ptree-files template-files)
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(let ([all-files-in-project-directory (directory-list pollen-project-directory)])
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(apply values
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(map (λ(test) (filter test all-files-in-project-directory))
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(list pollen-source? preproc-source? ptree-source? template-source?)))))
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;; The actual post-preproc files may not have been generated yet
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;; so calculate their names (rather than rely on directory list)
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(define post-preproc-files (map ->output-path preproc-files))
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;; Make a combined list of preproc files and post-preproc file, in alphabetical order
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(define all-preproc-files (sort (append preproc-files post-preproc-files)
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#:key path->string string<?))
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;; calculate names of post-pollen files
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(define post-pollen-files (map ->output-path pollen-files))
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;; Make a combined list of pollen files and post-pollen files, in alphabetical order
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(define all-pollen-files (sort (append pollen-files post-pollen-files) #:key path->string string<?))
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(define leftover-files (filter (λ(f) (and
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(not (equal? (->string f) "polcom")) ;todo: generalize this test
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(not ((->string f) . starts-with? . "."))
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(not (f . in? . all-pollen-files))
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(not (f . in? . all-preproc-files))))
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(directory-list pollen-project-directory)))
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;; Utility function for making file rows
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(define (make-file-row file routes)
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;; Utility function for making cells
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(define (make-link-cell type)
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(let* ([source (add-ext (remove-ext file) POLLEN_SOURCE_EXT)]
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[preproc-source (add-ext file POLLEN_PREPROC_EXT)]
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[file-string (->string file)]
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[name (case type
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['direct file-string]
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['preproc-source "source"]
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[else (->string type)])]
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[target (case type
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['direct name]
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[(source xexpr) (format "/~a/~a" type source)]
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['preproc-source (format "/~a/~a" 'raw preproc-source)]
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['force (format "/~a?force=true" file-string)]
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[else (format "/~a/~a" type file-string)])])
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`(td (a ((href ,target)) ,name))))
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`(tr ,(make-link-cell 'direct) ,@(map make-link-cell routes)))
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(if (andmap empty? (list ptree-files all-pollen-files all-preproc-files template-files leftover-files))
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'(body "No files yet. Get to work!")
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`(body
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(style ((type "text/css")) "td a { display: block; width: 100%; height: 100%; padding: 8px; }"
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"td:hover {background: #eee}")
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(table ((style "font-family:Concourse T3;font-size:115%"))
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;; options for ptree files and template files
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,@(map (λ(file) (make-file-row file '(raw))) (append leftover-files ptree-files template-files))
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;; options for pollen files
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,@(map (λ(file) (make-file-row file '(raw source xexpr force))) post-pollen-files)
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;; options for preproc files
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;; branching in λ is needed so these files can be interleaved on the list
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,@(map (λ(file) (make-file-row file '(raw preproc-source))) post-preproc-files)))))
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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)))) ; second value of first result
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; default route
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(define (route-default req)
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(define request-url (request-uri req))
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(define path (reroot-path (url->path request-url) pollen-project-directory))
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(define force (equal? (get-query-value request-url 'force) "true"))
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(with-handlers ([exn:fail? (λ(e) (message "Render is skipping" (url->string request-url) "because of error\n" (exn-message e)))])
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(render path #:force force)))
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