#!/bin/sh

# Copyright 2022 - 2023 Paul Hänsch
# 
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
# 
# THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
# IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

export REV_PAGES=${REV_PAGES:-true}
export REV_ATTACHMENTS=${REV_ATTACHMENTS:-false}
export WIKI_THEME="${WIKI_THEME:-default}"
export SEARCH_INDEX="${SEARCH_INDEX:-true}"
export USER_AUTH="${USER_AUTH:-default}"

. "${_EXEC:-${0%/*}}/cgilite/cgilite.sh"
. "${_EXEC}/cgilite/session.sh"
. "${_EXEC}/auth/${USER_AUTH}.sh"
. "${_EXEC}/tools.sh"
. "${_EXEC}/acl.sh"
. "${_EXEC}/themes/${WIKI_THEME}.sh"

which git >/dev/null || REV_PAGES=false
[ "$REV_PAGES" != true ] && REV_ATTACHMENTS=false

# Renew session cookie, only if cookie already set
[ "$(COOKIE session)" ] && SESSION_COOKIE

wiki_text() {
  # Print source text of a wiki page
  # Get page from data or underlay dir
  local page="$(PATH "$1")" mdfile

  mdfile="$(mdfile "$page")" || return 4
  acl_read "$page" || return 3
  cat -- "$mdfile"
}

if [ "$REV_PAGES" = true -a ! -f "$_DATA/.gitignore" ]; then
  cat >"$_DATA/.gitignore" <<-EOF
	users.db
	serverkey
	tags/
	index/
	**/#cache/
	**/#page.md.lock
	**/#page.*.cache
	**/#page.*.cache.*
	**/#page:*.*.cache
	**/#page:*.*.cache.*
	**/#index.flag
	EOF
  [ "$REV_ATTACHMENTS" != true ] \
  && printf '**/#attachments/\n' >>"$_DATA/.gitignore"
  git init "$_DATA"
  git -C "$_DATA" add .gitignore
  printf '%s\n' "" "[user]" \
         "email = \"shellwiki@localhost\"" \
         "name = \"Shellwiki\"" \
         >>"$_DATA/.git/config"
  git -C "$_DATA" commit -m 'initialization' -- .gitignore
fi 1>&2

for handler in "$_EXEC"/handlers/*; do
  . "$handler" && break
done
if [ $? != 0 ]; then
  export ERROR_MSG="The presented URL schema cannot be handled"
  theme_error 400
fi