#!/bin/bash
# Copyright 2007 Gilbert Ashley <amigo@ibiblio.org>

# text wrapper -formats text into lines of a certain number of characters
# words which overlap the end of line are moved to the next line -not hyphenated

WRAP_LENGTH=72
PKG_NAME=testname

OUTPUT_LINE_COUNT=0
OUTPUT=""

# collect all the input text into one long line
while read LINE ; do
	STRING="$LINE"
	# replace newlines with a space
	STRING=${STRING/'\n'/ /}
	# add the new text to the OUTPUT with a space between
	# if there are double spaces they get removed below.
	OUTPUT="$OUTPUT $STRING"
	shift
done

PARSESTRING="$OUTPUT"

while [[ $PARSESTRING != "" ]] ; do
	(( OUTPUT_LINE_COUNT++ ))
	# read the number of chars matching the wrap length
	CHUNK=${PARSESTRING:0:${WRAP_LENGTH}}
	# skip over everything but the last character of the CHUNK
	OFFSET_LENGTH=$(( $WRAP_LENGTH -1 ))
	# if the last character is a space or not null shorten the input line to the previous word
	if [[ "${CHUNK:$OFFSET_LENGTH:1}" = " " ]] || [[ "${CHUNK:$OFFSET_LENGTH:1}" != "" ]] ; then
		# keep everything before the last space
		CHUNK=${CHUNK%$" "*}
	fi
	# get the length of the finished chunk
	CHUNK_LENGTH=${#CHUNK}
	# advance the pointer the length of the chunk that we saved
	PARSESTRING=${PARSESTRING:$CHUNK_LENGTH}
	echo $PKG_NAME:"$CHUNK"
	# exit if we have reached the maximum number of lines
	if [[ $OUTPUT_LINE_COUNT -gt 12 ]] ; then
		break
	else
		CHUNK=""
	fi
done