Run a command before any terminal command

You might want to look into setting a DEBUG trap, which allows you to set up what is effectively a pre-exec hook in a manner similar to zsh. See https://superuser.com/questions/175799/does-bash-have-a-hook-that-is-run-before-executing-a-command.

Bash has the concept of assigning a function to ps1 so mine looks like

export PROMPT_COMMAND='PS1=$(make_ps1); set_xterm_title'

where make_ps1 is

    make_ps1()
    {
    if [ $? = 0 ];then
        echo '\[\e[${host_color}m\][\D{%F %T} \u@\h \W]\[\e[0m\]\n\$ '
    else
        echo '\[\e[7m\e[${host_color}m\][\D{%F %T} \u@\h \W]\[\e[0m\]\n\$ '
    fi
    }

you should be able to leverage that to do whatever you want, but it will run after the command is executed so this might not work for what you need.