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#!/usr/bin/guile \
-q -e main -s
!#
(add-to-load-path (dirname (current-filename)))
(add-to-load-path (string-append (dirname (current-filename)) "/monad/"))
(add-to-load-path "/home/hugo/code/calp/module") ; For (util), move that to a library
(use-modules (sxml match)
(srfi srfi-1)
(srfi srfi-43) ; Vector iteration
(srfi srfi-71)
(ice-9 regex)
(ice-9 popen)
(ice-9 match)
(ice-9 format)
(hnh util)
(hnh util path)
(monad)
(monad state)
(monad stack)
(fmt-stack)
(sxml gumbo)
(json parser)
((xdg basedir) :prefix xdg-))
(define-macro (regex-case str . cases)
`(cond
,@(map (lambda (case)
(let ((pattern (car case))
(rest (cdr case)))
(if (eq? pattern 'else)
`(else ,@rest)
`((string-match ,pattern ,str) ,@rest))))
cases)))
(define (substr-1 match)
(match:substring match 1))
(define (class-handlers class)
(fold (lambda (cl obj)
(regex-case
cl
("^DH$" (set-style obj 'bold))
("^bg([BYC])$" => (lambda (m) (->> (substr-1 m) string->symbol (set-bg obj))))
("^([BYC])$" => (lambda (m) (->> (substr-1 m) string->symbol (set-fg obj))))
(else obj)))
(empty-fmt-frame)
(string-split class #\space)))
;;; TODO every push and pop should emit current ANSI-escape after it has run.
;;; TODO Every clause should return a string, in the state context of a state.
(define (handle-h1-or-span class nodes)
(do fmt-before <- (get-attr)
(push (class-handlers class))
fmt-with <- (get-attr)
ret <- (<$> (lambda (s) (string-append fmt-with s fmt-before))
(<$> string-concatenate (sequence (map fmt-tag nodes))))
(pop)
(return-state ret)))
;; +-- State storage, "mutable"
;; | +- Return value, static
;; V V
;; sxml → State <fmt-stack> <string>
(define (fmt-tag tag)
(sxml-match
tag
[(a ,body ...)
(do fmt-before <- (get-attr)
(push (make-fmt-frame 'underline 'B #f))
fmt-with <- (get-attr)
(pop)
(return-state
(string-append fmt-with (car body) fmt-before)))]
[(h1 (@ (class ,class)) ,nodes ...)
(handle-h1-or-span class nodes)]
[(span (@ (class ,class)) ,nodes ...)
(handle-h1-or-span class nodes)]
[,str (guard (string? str)) (return-state str)]
;; Just ignore tags without children
[,default
(match default
((tag ('@ args ..) node nodes ...)
(<$> string-concatenate (sequence (map fmt-tag (cons node nodes)))))
((tag node nodes ...)
(<$> string-concatenate (sequence (map fmt-tag (cons node nodes)))))
((tag) (return-state ""))
(default (return-state (format #f "[|~a|]" default))))]))
(define (text-for-num j int)
(let* ((table (vector-ref j (- int 100)))
(arr (hashq-ref table 'content))
(text (array-ref arr 0)))
text))
(define (max-date vect)
(-> (find-max (vector->list vect)
(lambda (el) (assoc-ref el "date_updated_unix")))
(assoc-ref "date_updated_unix")))
(define (cache-path)
(path-append (xdg-cache-home) "texttv"))
(define (cache-file path)
"Gives path to file in cache directory."
(path-append (cache-path) path))
(define* (display-status-bar n max #:optional (port #t))
(let* ((progress (/ n max))
(trnc (truncate (* 60 progress))))
(format port
"\rProgress [~a~a] ~3d%"
(make-string trnc #\#)
(make-string (- 60 trnc) #\-)
(truncate (* 100 progress)))))
(define (main args)
(let* ((self filename pagestr (apply values args))
(page (string->number pagestr)))
(unless (file-exists? (cache-path))
(mkdir (cache-path))
(with-output-to-file (cache-file "last-updated")
(lambda () (display 0))))
(let ((last-updated (call-with-input-file (cache-file "last-updated") read)))
(when (> (- (current-time) last-updated) 10000)
(display "Downloading new data, please stand by...")
(system* "curl"
"-s" "http://api.texttv.nu/api/get/100-999?app=hugonikanor"
"-o" (cache-file filename))
(let* ((json (call-with-input-file (cache-file filename) json->scm))
(update (max-date json)))
(with-output-to-file (cache-file "last-updated") (lambda () (display update)))
(let ((vlen (vector-length json)))
(format (current-error-port)
"~%Rendering HTML~%")
(vector-for-each
(lambda (i el)
(let ((num (assoc-ref el "num"))
(text (-> el (assoc-ref "content") (vector-ref 0))))
(with-output-to-file (cache-file (format #f "~a.ansi" num))
(lambda ()
(display-status-bar i vlen (current-error-port))
(-> (html->sxml text
#:trim-whitespace? #f
#:full-document? #f)
fmt-tag
(run-state (list (make-fmt-frame "" "" "")))
car display)))))
json))
(display-status-bar 1 1 (current-error-port))
(newline (current-error-port))))
(let ((p1 (cache-file (format #f "~a.ansi" page)))
(p2 (cache-file (format #f "~a.ansi" (1+ page)))))
(system* "paste" p1 p2)))))
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