Determine Barclays Bike availability via the command line

bbikes.sh

function bbikes {
    location=${1:-$DEFAULT_BBIKE_LOCATION}
    if [ -z $location ]; then
        echo "usage: bbikes <location>"
        echo "(you can also set a default location with DEFAULT_BBIKE_LOCATION)"
        return 1
    fi
    url='https://web.barclayscyclehire.tfl.gov.uk/maps'
    user_agent='Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)'
    curl -sA "$user_agent" "$url" | grep ShowInfoB | grep -i "$location" | while read line; do
        name=$(echo $line | sed 's/.*name:"\([^"]*\)".*/\1/')
        echo $name
        num_bikes=$(echo $line | sed 's/.*nbBikes:"\([0-9]*\)".*/\1/')
        num_spaces=$(echo $line | sed 's/.*nbEmptyDocks:"\([0-9]*\)".*/\1/')
        echo "$num_bikes bikes available"
        echo "$num_spaces spaces available"
        echo
    done
}