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;;; tissue --- Text based issue tracker
;;; Copyright © 2022 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of tissue.
;;;
;;; tissue 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.
;;;
;;; tissue 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 tissue. If not, see <https://www.gnu.org/licenses/>.
(define-module (tissue web)
#:use-module (rnrs exceptions)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-28)
#:use-module (srfi srfi-171)
#:use-module (skribilo ast)
#:use-module (skribilo engine)
#:use-module (skribilo evaluator)
#:use-module (skribilo lib)
#:use-module (skribilo package base)
#:use-module (skribilo reader)
#:use-module (skribilo utils keywords)
#:use-module (skribilo writer)
#:use-module (sxml simple)
#:use-module (web uri)
#:use-module (tissue conditions)
#:use-module (tissue issue)
#:use-module (tissue utils)
#:export (issue-listing
build-website))
(define %tags-path
(make-parameter #f))
(define (mkdir-p directory)
"Create DIRECTORY and all its parents."
(unless (or (string=? directory "/")
(string=? directory "."))
(mkdir-p (dirname directory)))
(unless (file-exists? directory)
(mkdir directory)))
(define (replace-extension file new-extension)
"Return a new filename where the extension of FILE is replaced with
NEW-EXTENSION."
(string-append (substring file 0 (1+ (string-index-right file #\.)))
new-extension))
(define-markup (issue-list-item #:rest opts
#:key (ident #f) (class "issue-list-item")
(file #f) (title #f)
(creator #f) (created-date #f) (created-relative-date #f)
(last-updater #f) (last-updated-date #f) (last-updated-relative-date #f)
(assigned #f) (keywords #f) (open #f)
(tasks #f) (completed-tasks #f)
(posts #f))
(new container
(markup 'issue-list-item)
(ident (or ident (symbol->string (gensym "issue-list-item"))))
(class class)
(loc &invocation-location)
(required-options '(#:file #:title
#:creator #:created-date #:created-relative-date
#:last-updater #:last-updated-date #:last-updated-relative-date
#:assigned #:keywords #:open
#:tasks #:completed-tasks
#:posts))
(options `((#:file ,file)
(#:title ,title)
(#:creator ,creator)
(#:created-date ,created-date)
(#:created-relative-date ,created-relative-date)
(#:last-updater ,last-updater)
(#:last-updated-date ,last-updated-date)
(#:last-updated-relative-date ,last-updated-relative-date)
(#:assigned ,assigned)
(#:keywords ,keywords)
(#:open ,open)
(#:tasks ,tasks)
(#:completed-tasks ,completed-tasks)
(#:posts ,posts)
,@(the-options opts #:ident #:class
#:file #:title
#:creator #:created-date #:created-relative-date
#:last-updater #:last-updated-date #:last-updated-relative-date
#:assigned #:keywords #:open
#:tasks #:completed-tasks
#:posts)))
(body (the-body opts))))
(define (sanitize-string str)
"Downcase STR and replace spaces with hyphens."
(string-map (lambda (c)
(case c
((#\space) #\-)
(else c)))
(string-downcase str)))
(define (issue-list-item-markup-writer-action markup engine)
(sxml->xml
`(li (@ (class "issue-list-item"))
(a (@ (href ,(string-append
"/" (encode-and-join-uri-path
(string-split
(replace-extension (markup-option markup #:file)
"html")
#\/)))))
,(markup-option markup #:title))
,@(map (lambda (tag)
(let ((words (string-split tag (char-set #\- #\s pace))))
`(a (@ (href ,(string-append (%tags-path) "/"
(uri-encode (sanitize-string tag))
".html"))
(class ,(string-append "tag"
(if (not (null? (lset-intersection
string=? words
(list "bug" "critical"))))
" tag-bug"
"")
(if (not (null? (lset-intersection
string=? words
(list "progress"))))
" tag-progress"
"")
(if (not (null? (lset-intersection
string=? words
(list "chore"))))
" tag-chore"
"")
(if (not (null? (lset-intersection
string=? words
(list "enhancement" "feature"))))
" tag-feature"
""))))
,tag)))
(markup-option markup #:keywords))
(span (@ (class "issue-list-item-metadata"))
,(string-append
(format " opened ~a by ~a"
(markup-option markup #:created-relative-date)
(markup-option markup #:creator))
(if (> (markup-option markup #:posts) 1)
(format ", last updated ~a by ~a"
(markup-option markup #:last-updated-relative-date)
(markup-option markup #:last-updater))
""))))))
(markup-writer 'issue-list-item
(find-engine 'html)
#:options '(#:file #:title
#:creator #:created-date #:created-relative-date
#:last-updater #:last-updated-date #:last-updated-relative-date
#:assigned #:keywords #:open
#:tasks #:completed-tasks
#:posts)
#:action issue-list-item-markup-writer-action)
(define* (issue-listing #:optional (issues (reverse (issues))))
"Return an issue listing for ISSUES, a list of <issue> objects. By
default, all issues are listed newest first."
(itemize (map (lambda (issue)
(issue-list-item #:file (issue-file issue)
#:title (issue-title issue)
#:creator (issue-creator issue)
#:created-date (issue-created-date issue)
#:created-relative-date (issue-created-relative-date issue)
#:last-updater (issue-last-updater issue)
#:last-updated-date (issue-last-updated-date issue)
#:last-updated-relative-date (issue-last-updated-relative-date issue)
#:assigned (issue-assigned issue)
#:keywords (issue-keywords issue)
#:open (issue-open issue)
#:tasks (issue-tasks issue)
#:completed-tasks (issue-completed-tasks issue)
#:posts (issue-posts issue)))
issues)))
(define* (build-issue-listing issues output-file #:key title)
"Write an issues listing page listing ISSUES to OUTPUT-FILE."
(mkdir-p (dirname output-file))
(with-output-to-file output-file
(cut evaluate-document
(document #:title title
(issue-listing issues))
(find-engine 'html))))
;; TODO: Use guile-filesystem.
(define* (build-website output-directory #:key title css (tags-path "/tags"))
"Export current git repository to OUTPUT-DIRECTORY as a website.
TITLE is the title to use head of the generated HTML, among other
places.
CSS is the path to a CSS stylesheet. If it is #f, no stylesheet is
included in the generated web pages.
TAGS-PATH is the path relative to the document root where the per-tag
issue listings are put. It must begin with a /. If it is #f, per-tag
issue listings are not generated."
(when css
(engine-custom-set! (find-engine 'html) 'css css))
(mkdir-p output-directory)
;; Export auto-generated files. We must do this before exporting
;; user-created files to allow users to be able to override
;; auto-generated files.
(parameterize ((%tags-path tags-path))
;; Export home page listing all issues.
(let ((output-file (string-append output-directory "/index.html")))
(display (format "~a~%" output-file))
(build-issue-listing (reverse (issues)) output-file
#:title title))
;; Export per-tag listings.
(when tags-path
(for-each (lambda (tag)
(let ((output-file (string-append output-directory
tags-path "/"
(sanitize-string tag) ".html")))
(display (format "tag: ~a -> ~a~%" tag output-file))
(build-issue-listing (reverse (filter (lambda (issue)
(member tag (issue-keywords issue)))
(issues)))
output-file
#:title title)))
(delete-duplicates (append-map issue-keywords (issues))))))
;; Export user-created files.
(call-with-input-pipe
(lambda (port)
(port-transduce
(tmap (lambda (input-file)
(unless (string-prefix? "." (basename input-file))
(let* ((relative-input-file input-file)
(output-file (string-append output-directory "/"
(if (or (string-suffix? ".gmi" relative-input-file)
(string-suffix? ".skb" relative-input-file))
(replace-extension relative-input-file "html")
relative-input-file))))
(display (format "~a -> ~a~%" input-file output-file))
(mkdir-p (dirname output-file))
(if (or (string-suffix? ".gmi" input-file)
(string-suffix? ".skb" input-file))
(with-output-to-file output-file
(cut evaluate-document
;; Files may be renamed or deleted, but
;; not committed. Therefore, raise an
;; exception if the file does not exist.
(if (file-exists? input-file)
(call-with-input-file input-file
(cut evaluate-ast-from-port <>
#:reader ((reader:make (lookup-reader
(cond
((string-suffix? ".gmi" input-file)
'gemtext)
((string-suffix? ".skb" input-file)
'skribe)))))))
(raise (issue-file-not-found-error input-file)))
(find-engine 'html)))
(copy-file input-file output-file))))))
rcons get-line port))
"git" "ls-files"))
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