Simple posix shell script to check PS5 availability against multiple stores (curl & pup). Extend as appropriate.

get-ps5-stock.sh

#!/bin/bash
# Simple script to check PS5 availability against multiple stores
# @watbulb
[[ -n $DEBUG ]] && set -x || :
set -e -o posix

AGENT="Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0"
declare -a STORES=(
    # Bestbuy (bestbuy.html)
    https://www.bestbuy.ca/en-ca/product/playstation-5-digital-edition-console-online-only/14962184
    # Walmart (walmart.html)
    'https://www.walmart.ca/search?q=playstation%205'
    # XXX: Extend as appropriate
)
declare -a STORES_PUPS=(
    'span.availabilityMessage_1MO75 text{}:Coming soon'
    'div[data-product-id="6000202198823"] text{}:Not available'
    # XXX: Extend as appropriate
)


function iterate_stores() {

    for i in ${!STORES[@]}; do
        # Grab our store name, selector and compare text
          store_name=$(echo "${STORES[$i]}"      | cut -d/ -f1-3)
        pup_selector=$(echo "${STORES_PUPS[$i]}" | cut -d: -f1  )
        selector_cmp=$(echo "${STORES_PUPS[$i]}" | cut -d: -f2  )

        # Grab stock response and parse using pup
        response=$(curl   \
            -A "${AGENT}" \
            -H 'Cache-Control: no-cache' \
            -s "${STORES[$i]}" | pup "${pup_selector}")
        # Check for nil-selector response
        if [[ -z $response ]]; then
            echo $store_name '-> NOT FOUND'
            continue
        fi

        # Compare results
        case $response in
            *${selector_cmp}*)
                echo $store_name '-> NOT IN STOCK';;
            *)  echo $store_name '-> IN STOCK';;
        esac
    done
}

# $1: update_interval: int
function main() {

    if ! which -s pup; then
        echo "[!] $(basename $0) requires tooling dependencies: (pup)"
        return 255
    elif [[ $1 -le 0 ]]; then
        echo "[!] usage: $(basename $0) <update-interval(seconds)>"
        return 255
    fi

    while true; do
        iterate_stores
        sleep $1
    done

    return 0
}

main $@
exit $?

https://github.com/ericchiang/pup