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;;; -*- coding: utf-8 -*-
;;;
;;; 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 (useful)
#:use-module (haunt html)
#:use-module (haunt reader)
#:use-module (haunt utils)
#:use-module (haunt asset)
#:use-module (haunt builder blog)
#:use-module (haunt page)
#:use-module (haunt post)
#:use-module (haunt site)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (web uri)
#:use-module (ice-9 match)
#:use-module (sxml match)
#:use-module (sxml transform)
#:use-module (commonmark)
#:export (link*
default-theme
static-page
research-posts
projects-posts
centered-image
commonmark-reader*
date))
;;; HTML utilities ---------------------------------------------------
(define (link* name uri)
"Create a link with NAME to url URI."
`("[" (a (@ (href ,uri)) ,name) "]"))
(define (stylesheet name)
"Use the stylesheet NAME.css saved locally in css/."
`(link (@ (rel "stylesheet")
(href ,(string-append "/css/" name ".css")))))
(define (centered-image image)
"Create a centered image from source IMAGE."
`((div (@ (style "text-align: center")) (img (@ (src ,image))))))
;;; Post processing utilities ----------------------------------------
(define (date year month day)
"Create a SRFI-19 date for the given YEAR, MONTH, DAY"
(let ((tzoffset
(tm:gmtoff
(localtime (time-second (current-time))))))
(make-date 0 0 0 0 day month year tzoffset)))
(define (first-paragraph post)
"Extract the first paragraph from POST."
(let loop ((sxml (post-sxml post)) (result '()))
(match sxml
(() (reverse result))
((or (('p ...) _ ...) (paragraph _ ...))
(reverse (cons paragraph result)))
((head . tail) (loop tail (cons head result))))))
(define (contains? l m)
"Check if LIST contains MEMBER."
(if (null? l)
#f
(or (equal? (first l) m)
(contains? (drop l 1) m))))
(define (research? post)
"Check if POST has a research tag."
(contains? (post-ref post 'tags) "research"))
(define (projects? post)
"Check if POST has a projects tag."
(contains? (post-ref post 'tags) "projects"))
(define (research-posts posts)
"Returns POSTS that contain research tag in reverse chronological order."
(posts/reverse-chronological
(filter research? posts)))
(define (projects-posts posts)
"Returns POSTS that contain projects tag in reverse chronological order."
(posts/reverse-chronological
(filter projects? posts)))
;;; Links ------------------------------------------------------------
(define (github)
(link* "GitHub" "https://github.com/cristiancmoises"))
(define (linkedin)
(link* "LinkedIn" "https://www.linkedin.com/in/cristiancezarmoises"))
(define (orcid)
(link* "ResearchGate" "https://www.researchgate.net/profile/Cristian-Moises/research"))
(define (arxiv)
(link* "TOR" "http://secopscj53y6qltbysxt2bhnr2ohwzi6bh6wbxonycgc6tdemj4xkmyd.onion/"))
(define (ads)
(link* "Youtube" "https://youtube.com/@securityops"))
(define (cc-by-sa)
(link* "CC BY-SA 4.0" "https://creativecommons.org/licenses/by-sa/4.0/"))
;;; Website layout ---------------------------------------------------
(define (header-box)
`(div (@ (id "block"))
(p "+>---------------------------<+")
(p ,(link* "About" "/about.html")--
,(link* "Research" "/research.html")--
,(link* "Projects" "/projects.html"))
(p "+>---------------------------<+")
(br)))
(define (footer-box)
`(div (@ (id "block"))
(br)
(p "+>---------------------------<+")
(div ,(github)--
,(linkedin))
(div ,(orcid)--
,(arxiv)--
,(ads))
(p "© 2024 Cristian Cezar Moises")
(p ,(cc-by-sa))
(p "Built with "
,(link* "Haunt" "http://haunt.dthompson.us")
" in "
,(link* "Scheme" "https://www.gnu.org/software/guile/guile.html"))
(p "+>---------------------------<+")))
(define default-theme
(theme #:name
"default-theme"
#:layout
(lambda (site title body)
`((doctype "html")
(head (meta (@ (charset "utf-8")))
(meta (@ (name "description")
(content "C.C.M. personal website")))
(meta (@ (name "viewport")
(content "width=device-width, initial-scale=1")))
(title ,(string-append title " — " (site-title site)))
,(stylesheet "default"))
(body (header ,(header-box))
(div (@ (id "block")) ,body)
(footer ,(footer-box)))))
#:post-template
(lambda (post)
`((h1 ,(post-ref post 'title))
(div ,(date->string (post-date post) "~B ~d, ~Y"))
(div ,(post-sxml post))))
#:collection-template
(lambda (site title posts prefix)
(define (post-uri post)
(string-append
"/"
(or prefix "")
(site-post-slug site post)
".html"))
`((h1 ,title)
,(map (lambda (post)
(let ((uri (string-append
"/"
(site-post-slug site post)
".html")))
`(div (h2 (a (@ (href ,uri)
(style "text-decoration: none;"))
,(post-ref post 'title)))
(div ,(date->string (post-date post) "~B ~d, ~Y"))
(div ,(first-paragraph post))
,(link* "read more..." uri)
(br)
(p (@ (style "text-align: center;")) "-->--<--"))))
posts)))))
(define (static-page title file-name body)
"Create a static page with TITLE at html file FILENAME using page BODY."
(lambda (site posts)
(make-page
file-name
(with-layout default-theme site title body)
sxml->html)))
;;; Custom markdown reader --------------------------------------------------
(define (sxml-identity . args) args)
;; Code block
(define (code-block . tree)
(sxml-match
tree
((pre (code ,source))
`(div (@ (id "code"))
(pre (@ (style "overflow: auto")) (code ,source))))
(,other other)))
;; Convert hrefs to custom hoverable link
(define (hover-link . tree)
(sxml-match
tree
((a (@ (href ,uri) unquote _) unquote name)
`(,(link* name uri)))))
;; Center all images
(define (center-images . tree)
(sxml-match
tree
((img (@ (src ,uri) unquote _))
`(,(centered-image uri)))))
(define %commonmark-rules
`((pre unquote code-block)
(a unquote hover-link)
(img unquote center-images)
(*text* unquote (lambda (tag str) str))
(*default* unquote sxml-identity)))
(define (post-process-commonmark sxml)
(pre-post-order sxml %commonmark-rules))
(define commonmark-reader*
(make-reader
(make-file-extension-matcher "md")
(lambda (file)
(call-with-input-file
file
(lambda (port)
(values
(read-metadata-headers port)
(post-process-commonmark (commonmark->sxml port))))))))
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