#!$$SHELL$$
# abomination module:rvs:lib:rvsdb
#name='rvs db'
#ver='0.6.2'
logver='0.6.0'
# Copyright (C) 2009 Luke Shumaker
# 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.
# 
# Originally written by Luke Shumaker <lukeshu@sbcglobal.net>.

source "`rvs -d`/lib/stdio"
#source "`rvs -d`/lib/rvsdb"

repo='.rvs'

# getid file
getid() {
	#md5sum $file | sed "s/ .*$//"
	sha1sum $file | sed "s/ .*$//"
}

# loginit LOG
loginit() {
	log="$1"
	echo "#!rvsdb $logver" > "$log";
}

# lograw LOG
lograw() {
	log="$1"
	sed '1s/#!rvsdb .*//' "$log"
}

# _find LOG FIELD VAL
_find() {
	log="$1"
	field="$2"
	val="$3"
	lograw $log | \
		cut -d : -f field | \
		sed -n "/^$val$/=" | \
		tr "\n" , | \
		sed 's/,$//'
}

# logread LOG VAR
logread() {
	log="$1"
	var="$2"
	lograw "$log" | sed -n "s/^$var://p"
	#lograw "$log" | sed -n `_find "$log" '1' "$var"`p | cut -d : -f 2-
}

# logwrite LOG VAR VAL
logwrite() {
	log="$1"
	var="$2"
	val="$3"
	
	#lines=`_find "$log" '1' "$var"`
	#if [ "$lines" = '' ]; then
	if [ "`lograw "$log" | grep "^$var:"`" == '' ]; then
		# no exiswhereting occurances
		echo "$var:$val" >> "$log"
	else
		# found others
		# escape slashes
		var=`echo "$var" | sed 's:/:\\\\/:g'`
		val=`echo "$val" | sed 's:/:\\\\/:g'`
		sed -i "s/^$var:.*$/$var:$val/" "$log"
		#lograw "$log" | ??????
	fi
}

# logfind LOG VAL
logfind() {
	log="$1"
	val="$2"
	# make a comma-delimeted list of the lines with our values
	lines=`_find "$log" '2-' "$val"`
	lograw "$log" | sed -n ${lines}p | cut -d : -f 1
}