# Make snippet for exchanging data with a HedgeDoc pad
#
# Copyright 2024, Jonas Smedegaard <dr@jones.dk>
# SPDX-License-Identifier: GPL-3+
#
# Setup:
# in main Makefile...
#  * set variable PAD_LIST
#  * set variable PAD_REPLACE if supported and wanted
#  * include this make snippet
#
# Dependencies:
#  * hedgedoc <https://github.com/hedgedoc/cli>
#  * perl v5.36 or newer

# whitespace-delimited list of file-URI pairs,
# each consisting of a relative path to a local file
# and a relative URI to a HedgeDoc pad,
# separated by a colon
#PAD_LIST = \
# README.md:Xg5jgtkWQNqRzobI0qwrtw \
# our_project/subdir/foo.data:XxgHj9yCQ_e6bsETro5DMA

# when set to a non-empty value (and HedgeDoc service supports it),
# importing from local file will attempt to replace existing pad,
# instead of creating a new pad
#PAD_REPLACE = yes

# resolve files and URIs from PAD_LIST
_PADFILES = $(foreach i,$(PAD_LIST),$(firstword $(subst :,$() ,$i)))
_padfile2uri = $(patsubst $1:%,%,$(filter $1:%,$(PAD_LIST)))

# register with HedgeDoc service
pad-login:
	hedgedoc login --email

# list available pads at HedgeDoc service
pad-list:
	hedgedoc history

pad-export-all: $(_PADFILES:%=pad-export-to-%)

# export from pad to local file, and ensure it ends with a newline
$(_PADFILES:%=pad-export-to-%): pad-export-to-%:
	$(if $(wildcard $(dir $*)),,mkdir --parents $(dir $*))
	hedgedoc export --md $(call _padfile2uri,$*) $*
	perl -gpi -e 's/\s*\z/\n/' $*

$(_PADFILES:%=pad-import-from-%): pad-import-from-%: %
	hedgedoc import $< $(if $(PAD_WANTED),$(call _padfile2uri,$*))

.PHONY: pad-login pad-list pad-export-all $(_PADFILES:%=pad-export-to-%) $(_PADFILES:%=pad-import-from-%)