#!/bin/sh

# Admin notes:
# 
# Each note is just a file.  Stored under /var/spool/admin/notes/[open|ack]/<package>/<note>
# 
# note: list notes
# note ack <note> - moves note to "acknowledged" spool
# note list [package] show notes for a given package, or all notes
# note delete <note> - delete a note from the system
# note edit <package> [file] - edit or create a note

# TODO
# discard unchanged new note file
# quiet options to suppress new note name echo
# semi-quiet to just output the number
# renumber? to renumber all notes/reset sequence
# lock the temp files
# clean up unlocked temp files

SPOOL=/var/lib/admin/notes
OPEN=$SPOOL/open

set -e

umask 007

#cd $SPOOL || { echo "can't chdir to $SPOOL" ; exit 1; }

[ -z "$1" ] && set list

quiet=

cmd=$1
shift

findnote() {
	file=$(find $SPOOL -type f -name "$1")
	if [ -z "$file" ] ; then
		[ -z "$quiet" ] || printf "no such note $1\n" 1>&2
		exit 1
	fi
	echo $file
}

findopen() {
	file=$(find $SPOOL/open -type f -name "$1")
	if [ -z "$file" ] ; then
		[ -z "$quiet" ] || printf "no such open note $1\n" 1>&2
		exit 1
	fi
	echo $file
}

case $cmd in
	category)
		notefile=$(findnote $1)
		printf "%s\n" $(basename $(dirname $notefile))
		;;
	list)
		case $1 in
			-a) find $SPOOL/ack -type f -printf '%P\n' | sort -n
			       	;;
			*) find $SPOOL/open -type f -printf '%P\n' | sort -n
				;;
		esac
		;;
	detail)
		len=$(find $SPOOL/open -type f -printf "%P\n" | awk ' { if ( length > x ) { x = length } }END{ print x }')
		find $SPOOL/open -type f -printf "%P\n" | sort -n | while read note ; do
			subject=$(head -1 $SPOOL/open/$note)	
			date=$(stat -c '%y' $SPOOL/open/$note | cut -f1 -d' ')
			owner=$(stat -c '%U' $SPOOL/open/$note)
			printf '%*s %8s %s %s\n' $len $note $owner "$date" "$subject"
		done
		;;
	ack)
		file=$(findopen $1)
		subfile=$(echo $file | sed -e "s|$SPOOL/open/||")
		filedir=$(dirname $subfile)
		mkdir -p $SPOOL/ack/$filedir
		mv $file $SPOOL/ack/$filedir
		;;
	new)
		# new -- edit a new file for package general (or ZPMNOTEPACKAGE)
		# new package -- edit a new note for package
		# new package file -- use file for new package note
		if [ $# -eq 0 ]; then set ${ZPMNOTEPACKAGE:-general}; fi

		# edit a new file for the note
		if [ $# -eq 1 ]; then
			tmp=$(mktemp -p $SPOOL/open)
			pkg=$1
			[ -f $SPOOL/.template ] && cp $SPOOL/.template $tmp
			${EDITOR:-vi} $tmp
			file=$(zpm sequence notes)
			mv $tmp $SPOOL/open/$pkg/$file || { rm -f $tmp; exit 1; }
			echo "$pkg/$file"
			exit 0
		fi

		# take note from file or stdin
		pkg=$1 ; shift
		mkdir -p $SPOOL/open/$pkg
		case $1 in
			'-')
				tmp=$(mktemp -p $SPOOL/open)
				cat - > $tmp
				file=$(zpm sequence notes)
				mv $tmp $SPOOL/open/$pkg/$file || { rm -f $tmp ; exit 1; }
				echo $file
				;;
			*)
				tmp=$(mktemp -p $SPOOL/open)
				cp $1 $tmp
				#flock -n -E3 $tmp vim $tmp
				#if [ $? -eq 3 ]; then echo already editing $1; exit 1; fi
				file=$(zpm sequence notes)
				mv $tmp $SPOOL/open/$pkg/$file || { rm -f $tmp; exit 1; }
				echo $file
				;;
		esac
		;;
	edit)
		file=$(findnote $1)
		flock -n -E3 $file vim $file
		if [ $? -eq 3 ]; then echo already editing $1; exit 1; fi
		;;
	resolve)
		file=$(findnote $1)
		echo $file
		;;
	remove)
		file=$(findnote $1)
		rm $file
		;;
	show)
		file=$(findnote $1)
		${PAGER:-less} $file
		;;
	*)
		echo '$0: unknown command ' $cmd 1>&2
		exit 1
esac