diff options
Diffstat (limited to 'atom.scm')
| -rw-r--r-- | atom.scm | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/atom.scm b/atom.scm deleted file mode 100644 index 148a5cb..0000000 --- a/atom.scm +++ /dev/null @@ -1,238 +0,0 @@ -(define-module (atom) - #:use-module (srfi srfi-1) - #:use-module (srfi srfi-9) - #:use-module (srfi srfi-19) - #:use-module (sxml simple) - #:use-module (ice-9 binary-ports) - #:use-module (rnrs bytevectors) - #:export (feed - entry - person - media - render)) - -; ATOM Explanation: http://www.atomenabled.org/developers/syndication/ -; ATOM Validator: https://validator.w3.org/feed/check.cgi - -(define mime-types - '(("3gp" . "audio/3gpp") - ("3gpp" . "audio/3gpp") - ("3g2" . "audio/3gpp2") - ("3gpp2" . "audio/3gpp2") - ("aac" . "audio/aac") - ("adts" . "audio/aac") - ("loas" . "audio/aac") - ("ass" . "audio/aac") - ("au" . "audio/basic") - ("snd" . "audio/basic") - ("mp3" . "audio/mpeg") - ("mp2" . "audio/mpeg") - ("opus" . "audio/opus") - ("oga" . "audio/ogg") - ("aif" . "audio/x-aiff") - ("aifc" . "audio/x-aiff") - ("aiff" . "audio/x-aiff") - ("ra" . "audio/x-pn-realaudio") - ("wav" . "audio/x-wav") - ("avif" . "image/avif") - ("bmp" . "image/bmp") - ("gif" . "image/gif") - ("ief" . "image/ief") - ("jpg" . "image/jpeg") - ("jpe" . "image/jpeg") - ("jpeg" . "image/jpeg") - ("heic" . "image/heic") - ("heif" . "image/heif") - ("png" . "image/png") - ("svg" . "image/svg+xml") - ("tiff" . "image/tiff") - ("tif" . "image/tiff") - ("ico" . "image/vnd.microsoft.icon") - ("ras" . "image/x-cmu-raster") - ("pnm" . "image/x-portable-anymap") - ("pbm" . "image/x-portable-bitmap") - ("pgm" . "image/x-portable-graymap") - ("ppm" . "image/x-portable-pixmap") - ("rgb" . "image/x-rgb") - ("xbm" . "image/x-xbitmap") - ("xpm" . "image/x-xpixmap") - ("xwd" . "image/x-xwindowdump") - ("ogv" . "video/ogv") - ("mp4" . "video/mp4") - ("mpeg" . "video/mpeg") - ("m1v" . "video/mpeg") - ("mpa" . "video/mpeg") - ("mpe" . "video/mpeg") - ("mpg" . "video/mpeg") - ("mov" . "video/quicktime") - ("qt" . "video/quicktime") - ("webm" . "video/webm") - ("avi" . "video/x-msvideo") - ("movie" . "video/x-sgi-movie"))) - -;; Entities -(define-record-type <feed> - (make-feed id title subtitle uri date entries) - feed? - (id feed-id) - (title feed-title) - (subtitle feed-subtitle) - (uri feed-uri) - (date feed-date set-feed-date!) - (entries feed-entries set-feed-entries!)) - -(define-record-type <entry> - (make-entry id title published updated authors summary content categories contributors media) - entry? - (id entry-id set-entry-id!) - (title entry-title) - (published _entry-published) - (updated _entry-updated) - (authors entry-authors) - (summary entry-summary) - (content entry-content) - (categories entry-categories) - (contributors entry-contributors) - (media entry-media)) - -(define (date->string/RFC3339 date) - (date->string date "~4")) -(define (entry-published entry) - (date->string/RFC3339 (_entry-published entry))) -(define (entry-updated entry) - (date->string/RFC3339 (_entry-updated entry))) -(define (string->date/ISO string) - (string->date string "~Y-~m-~d")) - -(define-record-type <media> - (make-media title type length uri path contents) - media? - (title media-title) - (type media-type) - (length media-length) - (uri media-uri) - (path media-path) - (contents media-contents)) - -(define-record-type <person> - (make-person name email uri) - person? - (name person-name) - (email person-email) - (uri person-uri)) - -(define zero-date (string->date/ISO "1970-01-01")) -(define (newest a b) (if (time>? (date->time-utc a) (date->time-utc b)) a b)) -(define (find-newest dates) (reduce newest zero-date dates)) - -(define* (feed #:key (title "") - (subtitle "") - (uri "") - (entries '())) - (make-feed uri - title - subtitle - uri - (find-newest (map entry-updated entries)) - entries)) - -(define* (register-entry! feed entry) - (let ((entries (feed-entries feed))) - (set-entry-id! entry (string-append - (feed-uri feed) "/" - (number->string (length entries)))) ;; TODO: is this enough - (set-feed-entries! feed (append entries (list entry)))) - (set-feed-date! feed (find-newest (map entry-updated - (feed-entries feed))))) - - -(define* (entry feed #:key (title "") - (published "1970-01-01") - (updated "1970-01-01") - (authors '()) - (summary-html '()) - (content-html '()) - (categories '()) - (contributors '()) - (media '())) - - (register-entry! feed - (make-entry #f - title - (string->date/ISO published) - (find-newest (map string->date/ISO - (list published updated))) - authors - summary-html - content-html - categories - contributors - media))) - -(define* (person name #:key (email "") - (uri "")) - (make-person name email uri)) - - -(define* (media path #:key (title "") - (uri "")) - (define (type path) - (let* ((extension (car (last-pair (string-split path #\.)))) - (type (assoc-ref mime-types extension))) - (if (string? type) type (throw "Unknown mime-type")))) - (let ((contents (call-with-input-file path get-bytevector-all #:binary #t))) - (make-media title - (type path) - (bytevector-length contents) - uri - path - contents))) - -;; Rendering -(define (render-person tag person) - `(,tag - (name ,(person-name person)) - (uri ,(or (person-uri person) "")) - (email ,(or (person-email person) "")))) - -(define (partial f . set) - (lambda (. args) (apply f (append set args)))) -(define render-author (partial render-person 'author)) -(define render-contributor (partial render-person 'contributor)) - -(define (render-media med) - `(link (@(rel enclosure) - (href ,(media-uri med)) - (type ,(media-type med)) - (title ,(media-title med)) - (length ,(media-length med))))) - -(define (render-category cat) - `(category (@(term ,cat)))) - -(define (render-entry ent) - `(entry - (id ,(entry-id ent)) - (title ,(entry-title ent)) - (published ,(entry-published ent)) - (updated ,(entry-updated ent)) - ,@(map render-author (entry-authors ent)) - (summary (@(type html)) ,(entry-summary ent)) - (content (@(type html)) ,(entry-content ent)) - ,@(map render-category (entry-categories ent)) - ,@(map render-contributor (entry-contributors ent)) - ,@(map render-media (entry-media ent)))) - -(define (render-feed fe) - `(feed (@(xmlns "http://www.w3.org/2005/Atom")) - (id ,(feed-id fe)) - (title ,(feed-title fe)) - (link (@(href ,(feed-uri fe)) - (rel "self"))) - (updated ,(feed-date fe)) - (subtitle ,(feed-subtitle fe)) - ,@(map render-entry (feed-entries fe)))) - -(define* (render feed #:optional (port (current-output-port))) - (display "<?xml version=\"1.0\" encoding=\"utf-8\"?>" port) - (sxml->xml (render-feed feed)) port) |