+#!/bin/sh
+
+CACHE_AGE=${CACHE_AGE:-1800}
+export MD_MACROS="$_EXEC/macros"
+export MD_HTML="${MD_HTML:-false}"
+export WIKI_THEME=${WIKI_THEME:-default}
+
+. "$_EXEC/themes/${WIKI_THEME}.sh"
+
+if [ "$(which awk)" ]; then
+ md() { awk -f "$_EXEC/md_macros.awk" -f "$_EXEC/cgilite/markdown.awk"; }
+elif [ "$(which busybox)" ]; then
+ md() { busybox awk -f "$_EXEC/md_macros.awk" -f "$_EXEC/cgilite/markdown.awk"; }
+else
+ md() { cat; }
+fi
+
+wiki() {
+ # Print content of a wiki page
+ # Get page from data or underlay dir, handle caching
+ local page="$(PATH "$1")" mdfile cache cachetime
+
+ cache="$_DATA/pages/$page/#page.${USER_ID}.cache"
+
+ mdfile="$(mdfile "$page")" || return 4
+ acl_read "$page" || return 3
+
+ cachetime="$(stat -c %Y -- "$mdfile" "$cache" 2>/dev/null)"
+
+ if [ "${cachetime#*${BR}}" -gt "${cachetime%${BR}*}" \
+ -a "${cachetime#*${BR}}" -gt "$((_DATE - CACHE_AGE))" ]; then
+ cat "${cache}"
+ else
+ mkdir -p -- "$_DATA/pages/$page/"
+ # Macros expect to find page directory as working dir
+ ( cd -- "$_DATA/pages/$page/";
+ sed -E '1,20{ /^%[a-z]+/d; }' "$mdfile" \
+ | md |tee -- "${cache}.$$"
+ )
+ grep -q '^%nocache' "$mdfile" \
+ && rm -- "${cache}.$$" \
+ || mv -- "${cache}.$$" "${cache}"
+ fi
+}
+
+case "${PATH_INFO}" in
+ /"[.]"/*)
+ FILE "${_EXEC}/${PATH_INFO#/\[.\]}"
+ return 0
+ ;;
+ */\[*\]/*/)
+ return 1
+ ;;
+ */"#"*/*)
+ export ERROR_MSG="This page name is not allowed"
+ theme_error 400
+ return 0
+ ;;
+ */"[login]")
+ theme_page "/[wiki]/login/"
+ return 0
+ ;;
+ */"[register]")
+ theme_page "/[wiki]/register/"
+ return 0
+ ;;
+ */"[invite]")
+ theme_page "/[wiki]/invite/"
+ return 0
+ ;;
+ */)
+ theme_page "${PATH_INFO}"
+ return 0
+ ;;
+esac
+
+return 1