#!/bin/ksh
################################################################################
#DOCBEGIN
#
# Reads a text quotes file and grabs a random line to print out to stdout (screen).
#
# You can select a pattern to look for in the quotes file.
# You can select a specific quote file (with location).
#
# Created by Matt Baker on 3/2/91
# Modfied by Matt Baker on 6/11/2008
#
#DOCEND
################################################################################

DEBUG=0
QUOTE_FILE=$HOME/etc/quotes
QUOTE_FILE_SIZE=$HOME/etc/quotes.size

###########
# PARSING: read in options & arguments 
###########

while (( $# ))
do
	case $1 in

		-f) shift

			if (( $# ))
			then
				QUOTE_FILE=$1
				shift
				if [[ ! -f $QUOTE_FILE ]]
				then
					print "ERROR:5: quote file $QUOTE_FILE cannot create"
					exit 5
				fi
			else
				print "ERROR:1: quote file (-f) needs an argument"
				exit 1
			fi
			;;


		-debug) DEBUG=1
			shift
			;;

		-info | -doc) 
			awk '/DOCBEGIN/, /DOCEND/' $0 \
						| sed -e 's/^#//' \
						| sed -e '/DOCBEGIN/d' \
						| sed -e '/DOCEND/d' \
						|  more
			exit 0
			;;

		-h*) if [[ $1 != -h ]]
			then
				print "\n   OPTION: $1 is invalid.\n"
			else
				print ""
			fi

##############################################################################
cat << EOF
Usage: $0:
Usage: $0: [-debug] [-f inputFILE] [pattern]
Usage: $0: -info | -doc
Usage: $0: -h

 no args: defaults to just a random quote
 pattern: search for pattern and then print a random line with that pattern.
  -debug: debug mode, does a 'set -x' 

-info|doc: print out header of program (document)
      -h: help - command synopsis (this listing)
EOF
##############################################################################
			exit 1
			;;

		*) PATTERN="$*"
			shift
			;;

	esac
done

if (( DEBUG ))
then
	set -x
fi

if [[ ! -f $QUOTE_FILE_SIZE || $QUOTE_FILE -nt $QUOTE_FILE_SIZE ]]
then
	SIZE=$(grep -v \# $QUOTE_FILE \
		| wc -l \
		| awk '{print $1}')
	echo "SIZE=$SIZE" > $QUOTE_FILE_SIZE
else
	SIZE=$(awk -F= '/SIZE/ {print $2}' $QUOTE_FILE_SIZE)
fi

#get all non-commented lines, change tabs to CR and fold
if [[ -n $PATTERN ]]
then

	SIZE=$(grep -v \# $QUOTE_FILE \
		| grep -i "$PATTERN" \
		| wc -l \
		| awk '{print $1}')

	if (( $SIZE ))
	then
		let RAND=$RANDOM%$SIZE
		let RAND=$RAND+1

		grep -v \# $QUOTE_FILE \
				| grep -i "$PATTERN" \
				| sed -n "$RAND"p \
				| tr '\011' '\012' 
				#| tr '\011' '\012' \
				#| fold -w 79
	else
		print "ERROR:3:Pattern \"$PATTERN\" not found."
		exit 3
	fi
else
	let RAND=$RANDOM%$SIZE
	let RAND=$RAND+1

	grep -v \# $QUOTE_FILE \
			| sed -n "$RAND"p \
			| tr '\011' '\012'
			#| tr '\011' '\012' \
			#| fold -w 79
fi