#!/bin/bash

# *************************************************************

# file trigger.inc.sh

# date: 2006-02-15 09:59

# author: Marko Schulz - <mschulz@jamba.net>

# description: Check interval if an script can start.

# *************************************************************

#

#

# SYNOPSIS

#

#    # load this file in your main script:

#    test -f ./trigger.lib && source ./trigger.lib || exit 1

#

#    First argument is the path to an date file. Second argument

#    is the interval: Hourly(H), Daily(D), Weekly(W), Monthly(M).

#    ! ( trigger '/path/to/datefile.txt' 'D' ) && exit 0

#    date +'%Y-%m-%d %H:%M:%S' > /path/to/datefile.txt

#    

#    # here beginns your program...

#

# *************************************************************

function trigger () {

file=$1

date=$( date +'%Y-%m-%d %H:%M:%S' )

[ ! -f "$file" ] && ( echo "no file defined" ) && exit 1

case "$2" in

	h|H)

		# Hourly - get hour from date...

		temp=$( echo $date | cut -d: -f1-2 )

		if [ "$( cat $file | cut -d: -f1-2 )" != "$temp" ]; then

			true

		else

			false

		fi

	;;

	d|D)

		# Daily - get day from date...

		temp=$( echo $date | awk '{ print $1 }' )

		if [ "$( cat $file | awk '{ print $1 }' )" != "$temp" ]; then

			true

		else

			false

		fi

	;;

	w|W)

		# Weekly - get week from date...

		# ???

	;;

	m|M)

		# Monthly - get month from date...

		temp=$( echo $date | cut -d- -f1-2 )

		if [ "$( cat $file | cut -d- -f1-2 )" != "$temp" ]; then

			true

		else

			false

		fi

	;;

	*)

		echo "modus is not a valid argument"

		exit 1

	;;

esac

}

# *************************************************************

# end of this library...