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batteries.sh

#!/usr/bin/env bash

# $1 : battery code
try_battery_code() {
    raw=$(curl -s "https://duckduckgo.com/html" \
            -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86; rv:49.0) Gecko/20100101 Firefox/49.0' \
            -H 'Accept-Language: en-US,en;q=0.5' \
            --compressed -H 'Referer: https://duckduckgo.com/' \
            -H 'Content-Type: application/x-www-form-urlencoded' \
            -H 'Connection: keep-alive' \
            -H 'Upgrade-Insecure-Requests: 1' \
            -H 'TE: Trailers' \
            --data "q=${1}+battery&b=&kl=us-en" \
    | grep "${1}" \
    | grep -i "lipo\|Li-Po" \
    | grep "result__snippet") \
    && {
        echo "${1}:"
        i=0
        readarray links <<<"$(echo "${raw}" | cut -d '=' -f3- | cut -d '>' -f1)"
        # echo "got: ${links[0]}"
        for l in "${links[@]}"; do
            echo " - [$((i++))]($(tr -d $'\n' <<< "${l}"))"
        done
        echo ""
    } > ${1}.part \
    || {
        return 1
    }
}

# Battery codes are of the form: 042535
# 1,000,000 codes to try! (excluding the 7 digit ones).
count=0
limit=$(($(nproc) * 10))
for i in {0..1000000..5}; do
    code="$(printf "%06d" ${i})"

    try_battery_code "${code}" && ((count++)) &
    echo -ne "On ${code}\r"

    sleep 15

    # while [ $(jobs -rp | wc -l) -gt ${limit} ]; do
    #     sleep 1
    # done
done

cat *.part > res.md
echo "${count} ($(ls -l *.part | wc -l))batteries found!" >> res.md
rm *.part