#!/bin/bash

# stockmon.sh - monitor any given stock market symbol via yahoo's financial services
# Licensed under the terms of the GNU GPLv3 or later
# Proprietary Software Must Perish!

# AUTHOR: Johannes Truschnigg ( johannes.truschnigg@gmx.at || http://johannes.truschnigg.info )

[[ ${#} -eq 0 ]] && echo 1>&2 "Usage: ${0##*/} SYMBOL [DELAY]" && exit 1;
STM_SYM="${1}";
STM_POS='\E[34m';
STM_NEG='\E[31m';
STM_QUOTE="NA";
while :;
do
        STM_OLDQUOTE="${STM_QUOTE}";
        STM_QUOTE=$(wget --quiet -O- "http://finance.yahoo.com/d/quotes.csv?s=${STM_SYM}&f=l1" || echo "NA");
        STM_QUOTE="${STM_QUOTE%%?}";
        if [[ ${STM_QUOTE/NA/0} < ${STM_OLDQUOTE/NA/0} ]];
        then
                printf "%s: %s @ ${STM_NEG}%.2f-\n" "$(date)" "${STM_SYM}" "${STM_QUOTE}";
                tput sgr0;
        elif [[ ${STM_QUOTE/NA/0} > ${STM_OLDQUOTE/NA/0} ]];
        then
                printf "%s: %s @ ${STM_POS}%.2f+\n" "$(date)" "${STM_SYM}" "${STM_QUOTE}";
                tput sgr0;
        else
                printf "%s: %s @ %.2f\n" "$(date)" "${STM_SYM}" "${STM_QUOTE}";
        fi
        sleep ${2:-10};
done