# Copyright (C) 2023-2024 Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.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 <https://www.gnu.org/licenses/>.

CURL ?= curl
BLOG_URL ?= https://blog.replicant.us/page

GUILE_PATCH = 0001-SRFI-19-Add-support-for-ISO-8601-zones-with-a-colon.patch
GUIX_COMMIT ?= b25b94335a3ee8d68d2145da8e5ea0325ecea451
GUIX_SHELL ?= guix time-machine --commit=$(GUIX_COMMIT) -- shell -C
GUIX_PYTHON_PACKAGES ?= python python-beautifulsoup4 python-html2text python-sh

CONVERT ?= $(GUIX_SHELL) $(GUIX_PYTHON_PACKAGES) -- python3 convert.py
HAUNT ?= $(GUIX_SHELL) --with-patch=guile=patches/$(GUILE_PATCH) haunt -- haunt

VENDOR_REPLICANT_ARTWORK_REV ?= fc213d2ca94cef9047d1e4a71c21c4c4c87f349d
VENDOR_REPLICANT_ARTWORK_PATH ?= external/vendor_replicant_artwork

SENTINEL =

.PHONY: \
	all \
	build \
	deploy \
	generate-wordpress-articles \
	help \
	posts \
	serve \
	update-makefile \
	$(SENTINEL)

# Input: wordpress/articles/2015_07_replicant-source-code-hosting-and-rmll-2015.html
# Output: https://blog.replicant.us/2015/07/replicant-source-code-hosting-and-rmll-2015/
define get-wordpress-article-url

(use-modules (ice-9 regex))

;; Input: wordpress/articles/2015_07_replicant-source-code-hosting-and-rmll-2015.html
;; Output: 2015_07_replicant-source-code-hosting-and-rmll-2015.html
(define (local-filename name)
  (list-ref (string-split name #\/) 2))

;; Output: 2015
(define year
  (car (string-split (local-filename "$@") #\_)))

;; Output: 07
(define month
  (cadr (string-split (local-filename "$@") #\_)))

;; Output: replicant-source-code-hosting-and-rmll-2015.html
(define html-page
  (regexp-substitute
   #f
   (string-match
    "[0-9]{4}_[0-9]{2}_"
    "$@")
   'post))

;; Output: replicant-source-code-hosting-and-rmll-2015
(define page-path
  (regexp-substitute
   #f
   (string-match
    ".html"
    html-page)
   'pre))

(string-append "https://blog.replicant.us/" year "/" month "/" page-path "/")
endef

WORDPRESS_PAGES = \
	wordpress/pages/replicant_blog_page_8.html \
	wordpress/pages/replicant_blog_page_7.html \
	wordpress/pages/replicant_blog_page_6.html \
	wordpress/pages/replicant_blog_page_5.html \
	wordpress/pages/replicant_blog_page_4.html \
	wordpress/pages/replicant_blog_page_3.html \
	wordpress/pages/replicant_blog_page_2.html \
	wordpress/pages/replicant_blog_page_1.html \
	wordpress/pages/replicant_blog_page_0.html \
	$(SENTINEL)


all: help

wordpress/articles:
	mkdir -p $@

wordpress/pages:
	mkdir -p $@

wordpress/pages/replicant_blog_page_%.html: wordpress/pages
	$(CURL) $(BLOG_URL)/$(subst replicant_blog_page_,,$*)/ -o $@

generate-wordpress-articles: build
	$(GUIX_SHELL) $(GUIX_PYTHON_PACKAGES) \
	-- \
	python3 haunthtml2wordpress.py \
	./site/replicant-status-and-report-of-the-37c3-and-fosdem-2024-conferences.html

links.txt: $(WORDPRESS_PAGES)
	@echo -n '' > $@
	@for f in $(WORDPRESS_PAGES) ; do \
		echo "Processing $$f" > /dev/stderr ; \
		guix shell -C python python-beautifulsoup4 -- \
		python3 get_links.py $$f | sort -u >> $@ ; \
	done

# do not depend on links.txt as a human is supposed to review it manually
update-makefile:
	guile build/update-makefile-markdown-articles.scm

wordpress/articles/%.html:
	curl "$(guile $(get-wordpress-article-url))" -o $@

posts/%.md: wordpress/articles/%.html
	mkdir -p posts
	$(CONVERT) $^ $@

posts: $(POSTS)

$(VENDOR_REPLICANT_ARTWORK_PATH):
	git clone \
		https://git.replicant.us/replicant/vendor_replicant_artwork \
		$(VENDOR_REPLICANT_ARTWORK_PATH)

static/replicant_banner_white.png: vendor_replicant_artwork_revision.txt
	install -m 644 \
		$(VENDOR_REPLICANT_ARTWORK_PATH)/replicant_banner_white.png \
		$@

vendor_replicant_artwork_revision.txt: $(VENDOR_REPLICANT_ARTWORK_PATH) Makefile
	if [ ! -f $@ ] || [ "`cat $@`" != "$(VENDOR_REPLICANT_ARTWORK_REV)" ] ; \
	then \
		rm -f $@ ;                                                      \
		git -C $(VENDOR_REPLICANT_ARTWORK_PATH) fetch origin ;          \
		git -C $(VENDOR_REPLICANT_ARTWORK_PATH)                         \
			checkout -f $(VENDOR_REPLICANT_ARTWORK_REV) ;           \
		git -C $(VENDOR_REPLICANT_ARTWORK_PATH) reset --hard ;          \
		git -C $(VENDOR_REPLICANT_ARTWORK_PATH) clean -dfx ;            \
		echo $(VENDOR_REPLICANT_ARTWORK_REV) > $@ ;                     \
	fi

build: static/replicant_banner_white.png
	$(HAUNT) build

deploy: build
	rsync -av site/ root@git.replicant.us:/var/www/blog.test.replicant.us/

help:
	@printf "%s\n\t%s\n\t%s\n\t%s\n\t%s\n\t%s\n\t%s\n\t%s\n" \
	"Available commands:" \
	"make build       # Generate the HTML files with haunt." \
	"make deploy      # Copy the html files to https://blog.test.replicant.us" \
	"make links.txt   # Create links.txt file with blog post links." \
	"                 # For security reasons This file needs to be manually" \
	"                 # reviewed manually before usage." \
	"make posts       # create blog posts markdown pages. To be done after reviewing links.txt." \
	"make check       # Run tests." \

serve:
	$(HAUNT) serve -w -p $(HAUNT_PORT)

website.tar.gz: build
	tar \
		--exclude-vcs \
		--format=gnu \
		--owner=0 --group=0 --numeric-owner \
		--sort=name \
		-czf \
		website.tar.gz \
		site \
		pages/img \
		index.html \
		--transform="s#^site#web#" \
		--transform="s#^pages/img/#web/img/#"
check: build
	./tests.sh