isUpPingPong

#!/bin/bash
: ${URL_TO_WATCH:="http://dev.jhrb.us:8080"}
: ${WATCH_RESOLUTION:="2"}
[[ ! -z "${2}" ]] && WATCH_RESOLUTION=${2}
echo ${WATCH_RESOLUTION}
: ${URL_STARTED:="#othertools"} #Who needs to know the successful start?
: ${URL_FAILED:="@wizardofmath"} #Who needs to know when it fails?
if [ -z $SLACK_WEBHOOK_TOKEN ]; then
        echo "Need a webhook token..." 2>&1
        exit 0
fi

message(){
    local MESSAGE=${2}
    local SLACK_FROM=$(whoami)
    local SLACK_TO=${1}
    curl -s -X POST https://hooks.slack.com/services/${SLACK_WEBHOOK_TOKEN} -d "{ \"text\": \"${MESSAGE}\" , \"channel\": \"${SLACK_TO}\" , \"username\" : \"${SLACK_FROM}-Bot\" }"
}

isServerUp(){
    COUNTER=0
    while [[ "$(curl -s --max-time 1 ${URL_TO_WATCH}/ping)" != "pong" ]]
    do
        [[ $COUNTER -gt ${1} ]] && break
        let COUNTER=COUNTER+1
        sleep 1
    done
    if [[ "$(curl -s --max-time 1 ${URL_TO_WATCH}/ping)" == "pong" ]];then
        return 0
    else
        return 1
    fi
}
sendResponse(){
    if [[ "${1}" == "0" ]];then
        message ${URL_STARTED} "Server is running URL: ${URL_TO_WATCH} :+1:"
    elif [[ "${1}" == "1" ]]
    then
        message ${URL_FAILED} "${URL_TO_WATCH} Is down! :-1:"
    fi
}

if [[ "${1}" == "watch" ]]
then
    message ${URL_STARTED} "I am watching ${URL_TO_WATCH} forever. \`RES:${WATCH_RESOLUTION}\`"
    isServerUp ${WATCH_RESOLUTION}
    WAS_UP=${?}
    sendResponse ${WAS_UP}
    while [[ 1 == 1 ]]
    do
        isServerUp ${WATCH_RESOLUTION}
        UP=${?}
        [[ "${WAS_UP}" != "${UP}" ]] && sendResponse ${UP}
        WAS_UP=${UP}
        sleep 5
    done
else
    message ${URL_STARTED} "I'll Let you know when ${URL_TO_WATCH} is up."
    isServerUp 7200
    sendResponse  ${?}
fi