#!/bin/bash

URL=${1}
EMAIL=${2}
NAME=${3}

LOG_FILE="/tmp/Ubiquiti Stock ${NAME}.log"

echo "" > "${LOG_FILE}"

echo "URL: ${URL}"  | tee -a "${LOG_FILE}"
echo "Email: ${EMAIL}"  | tee -a "${LOG_FILE}"
echo "Name: ${NAME}"  | tee -a "${LOG_FILE}"

SOURCE_FILE="/tmp/Ubiquiti Stock ${NAME}.source"

echo "Source File: ${SOURCE_FILE}" | tee -a "${LOG_FILE}"

wget -qO "${SOURCE_FILE}" ${URL}

INVENTORY_QUANTITY=$(grep -o -m 1 '"inventory_quantity":[0-9]\+,' "${SOURCE_FILE}" | grep -o '[0-9]\+')

echo "Inventory Quantity: ${INVENTORY_QUANTITY}" | tee -a "${LOG_FILE}"

if [[ "${INVENTORY_QUANTITY}" -gt "0" ]]; then
    MESSAGE="There are currently ${INVENTORY_QUANTITY} ${NAME} in stock. ${URL}"
    echo "Message: ${MESSAGE}" | tee -a "${LOG_FILE}"
    echo "${MESSAGE}" | mailx -r "stockalerts@johnhgaunt.com" --set smtp="smtp.home.johnhgaunt.com:25" "${EMAIL}"
    echo "Email sent" | tee -a "${LOG_FILE}"
else
    echo "Not sending email" | tee -a "${LOG_FILE}" 
fi