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;;; Copyright © 2019 - 2022 Jakob L. Kreuze <zerodaysfordays@sdf.org>
;;;
;;; This program is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU General Public License as
;;; published by the Free Software Foundation; either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (jakob utils webmention)
#:use-module (ice-9 receive)
#:use-module (ice-9 iconv)
#:use-module (ice-9 match)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-43)
#:use-module (json)
#:use-module (web client)
#:use-module (web response)
#:use-module (oop goops)
#:export (render-comment-view
fetch-webmentions))
(define (wm-not-null? value)
(and value
(not (eqv? 'null value))
(not (string= "" value))))
(define (format-comment webmention)
"Format `webmention', an alist, as SXML for a comment-type interaction"
(define (strip uri)
"Attempt to remove any sort of protocol specification from `uri'"
(let* ((needle "://")
(index (string-contains uri needle)))
(if index
(strip (substring uri (+ index (string-length needle))))
uri)))
(let* ((author (assoc-ref webmention "author"))
(author-name (assoc-ref author "name"))
(author-url (assoc-ref author "url"))
(author-url
(if (wm-not-null? author-url)
author-url
(assoc-ref webmention "wm-source")))
(author-photo (assoc-ref author "photo"))
(author-photo
(cond ((string-prefix? "https://lobste.rs/" author-url) "/static/image/lobsters.png")
((wm-not-null? author-photo) author-photo)
(else "/static/image/default-icon.png")))
(content (assoc-ref webmention "content"))
(content-text (assoc-ref content "text"))
(published-time (assoc-ref webmention "published"))
(received-time (assoc-ref webmention "wm-received"))
(url (assoc-ref webmention "url"))
(time (if (eqv? 'null published-time) received-time published-time)))
`(li (@ (class "p-comment h-cite comment comment-source-webmention"))
(img (@ (class "comment-source-identifier")
(alt "Webmention logo")
(src "/static/image/webmention-logo.png")))
(div (@ (class "p-author h-card author"))
(img (@ (class "u-photo") (src ,author-photo)))
(a (@ (class "p-name u-url")
(href ,author-url))
,author-name)
(a (@ (class "author-url")
(href ,author-url))
,(strip author-url)))
(div (@ (class "e-content p-name comment-content"))
,content-text)
(div (@ (class "metaline"))
(a (@ (class "u-url")
(href ,url))
(time (@ (class "dt-published")
(datetime ,time))
,(date->string
(string->date time "~Y~m~d~H~M~S")
"~B ~e, ~Y at ~H:~M")))))))
(define (format-interaction webmention)
"Format `webmention', an alist, as SXML for a rich interaction without content"
(let* ((author (assoc-ref webmention "author"))
(author-name (assoc-ref author "name"))
(author-url (assoc-ref author "url"))
(author-url
(if (wm-not-null? author-url)
author-url
(assoc-ref webmention "wm-source")))
(author-photo (assoc-ref author "photo"))
(author-photo
(cond ((string-prefix? "https://lobste.rs/" author-url) "/static/image/lobsters.png")
((wm-not-null? author-photo) author-photo)
(else "/static/image/default-icon.png"))))
`(li (@ (class "p-comment h-cite interaction comment-source-webmention"))
(a (@ (href ,author-url))
(img (@ (class "u-photo") (src ,author-photo))))
(div (@ (class "e-content p-name comment-content"))
(em
,(match (assoc-ref webmention "wm-property")
("repost-of" "Reposted this!")
("like-of" "Favorited this!")
("bookmark-of" "Bookmarked this!")
("mention-of" "Mentioned this!")
(_ "[No Text Provided]"))))
(img (@ (class "comment-source-identifier")
(alt "Webmention logo")
(src "/static/image/webmention-logo.png"))))))
(define (render-comment-view response)
"Render `response', the output of `fetch-webmentions', as SXML"
(vector->list
(vector-map (lambda (_ x)
(if (and (assoc-ref x "content")
(not (string= (assoc-ref x "wm-property") "repost-of")))
(format-comment x)
(format-interaction x)))
(assoc-ref response "children"))))
(define (fetch-webmentions slug)
"Blocking call to webmention.io to retrieve a vector of all Webmentions for `slug'"
(define prefixes '("http://jakob.space/" "https://jakob.space/"
"http://jakob.space/blog/" "https://jakob.space/blog/"))
(let* ((target-queries (map (lambda (pre)
(format #f "target[]=~a~a.html" pre slug))
prefixes))
(url (format #f "https://webmention.io/api/mentions.jf2?per-page=200&page=0&~a"
(string-join target-queries "&"))))
(receive (response-status response-body)
(http-request url)
(call-with-input-string (bytevector->string response-body "UTF-8") json->scm))))
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