OSRS Ping Monitor

monitor-osrs-ping.sh

#!/bin/bash

highping=80
interval=0.5

function print_usage() {
    cat <<EOF
Usage: $0 <WORLD> <HIGH_PING> <INTERVAL>

WORLD		[REQUIRED] The world to check ping for.
HIGH_PING	[OPTIONAL - Default: $highping] The value at which a ping >= value gives a warning.
INTERVAL	[OPTIONAL - Default: $interval] The interval in seconds for ping updates.
EOF
}

function check_for_args() {
    if [[ $# -ne 3 && $# -ne 2 && $# -ne 1 ]]
    then
        print_usage; exit 1
    elif [[ ${1} =~ '^[0-9]+$' ]]
    then
        echo "Error: World parameter must be a number." >&2; exit 1
    elif [[ ${1} -lt 301 || ${1} -gt 536 ]]
    then
        echo "Error: World parameter must be between 301 and 535." >&2; exit 1
    else
        world=$(( ${1} - 300 ))
        if [ $# -ge 2 ]
        then
            if ! [[ ${2} =~ ^(0*[1-9][0-9]*(\.[0-9]+)?|0+\.[0-9]*[1-9][0-9]*)$ ]]
            then
                echo "Error: High Ping parameter must be a positive integer or float." >&2; exit 1
            else
                highping=${2}
            fi
            if [[ $# -eq 3 ]]
            then
                if ! [[ ${3} =~ ^(0*[1-9][0-9]*(\.[0-9]+)?|0+\.[0-9]*[1-9][0-9]*)$ ]]
                then
                    echo "Error: Interval parameter must be a positive integer or float." >&2; exit 1
                else
                    interval=${3}
                fi
            fi
        fi
    fi
}

function print_pings() {
    tput cup `tput lines` 0

    while true
    do
        ping_value=`ping -c 1 "oldschool${world}.runescape.com" \
            | awk 'BEGIN {FS="[=]|[ ]"} NR==2 {print $11}'`
        if (( $(bc <<< "${ping_value} >= ${highping}") ))
        then
            printf "\rHigh Ping detected! Ping: ${ping_value}\n"
        fi
        ping_print="Current Ping: ${ping_value}"
        printf "\r${ping_print}"
        tput cup `tput lines` $(( `tput cols` - 3 ))
        sleep ${interval}
    done
}

check_for_args $@
if [[ $? -eq 0 ]]
then
    print_pings
fi