#!/bin/bash
# Test: stringContain [-i] "sub string" "full string"

stringContain() {
    if [[ $1 == -i ]] ; then
	case ${3,,} in
	    *${2,,}*) return ;;
	    *) return 1 ;;
	esac
    else
	case $2 in
	    *$1*) return ;;
	    *) return 1 ;;
	esac
    fi
}