How to add an unbroken line in bash starting from end of my left hand PS1 text to the right hand side

I am having trouble wrapping my mind around this little problem

Basically Im using this bash PS1 script because its kinda cool:

PS1="\n \[\033[0;34m\]╭─────\[\033[0;31m\]\[\033[0;37m\]\[\033[41m\] \u \[\033[0m\]\[\033[0;31m\]\[\033[0;34m\]─────\[\033[0;32m\]\[\033[0;30m\]\[\033[42m\] \w \[\033[0m\]\[\033[0;32m\] \n \[\033[0;34m\]╰ \[\033[1;36m\]\$ \[\033[0m\]"

looks like this:

What I want to do is print a time stamp on the right hand side with a solid line connecting the end of the left side to the beginning of the right side of the text, for example:

ben @ local ------------------------------------------12:00pm

I tried doing this:

$(printf '%*s' $COLUMNS  '-')

but that obviously just creates a whole new line filled with the dashes.

How do I get the value of where the curser left off, I see tput sc but I don't understand how to use that in a variable? Then print the lines, leaving maybe 5 characters on the right side for the time.

This is my first foray into bash scripting so forgive my ignorance.

Any help is appreciated

First, you have to strip escape sequences from the prompt string and expand it to get the real length to subtract the column length.

prompt_handler(){
    local A="$2[\A]"

    while [[ $A =~ \\[\x1b\\[[0-9\;]*m\\] ]]; do
       A=${A//"${BASH_REMATCH}"}
    done

    A=${A@P} \
    A=$((COLUMNS-${#A}))

    eval printf \
        -v A ─%.s {1..$A}

    PS1="$1$2${A}[\A]$3"
}

PROMPT_COMMAND='prompt_handler "\n" " \[\033[0;34m\]╭─────\[\033[0;31m\]\[\033[0;37m\]\[\033[41m\] \u \[\033[0m\]\[\033[0;31m\]\[\033[0;34m\]─────\[\033[0;32m\]\[\033[0;30m\]\[\033[42m\] \w \[\033[0m\]\[\033[0;32m\]" "\n \[\033[0;34m\]╰ \[\033[1;36m\]\$ \[\033[0m\]"'