Simple theme switcher for script server

themes.sh

#!/bin/bash
#
#       version: 0.1
#   description: simple script to change the theme of Script Server
# prerequisites: script server 1.17.0 or later
#                w/i container, create /app/conf/theme/
#                theme naming example, theme.my_theme.css
#
#        source: https://github.com/bugy/script-server/issues/324#issuecomment-751253715
#
#     cli usage: ${0} [args]
#          args -       help            (this help)
#                       init            (print runner json info)
#                       list            (list availble and current theme setting)
#                       switch <theme>  (switch to theme)
#

theme_dir=/app/conf/theme

list () {
 if [ ! -d "${theme_dir}" ]; then
    echo "Directory [${theme_dir}/] does not exist, are you running this outside of docker container?"; return
 elif [ "${symlink}" == "none" ]; then
     echo "default (current)"
 else
     echo default
 fi
 if [ "${symlink}" ]; then
    ls -1 ${theme_dir}/theme.[a-z]*.css | awk -v str="${symlink}" -F "[/]" '{if ($NF ~ str) {print $NF,"(default)"} else {print $NF}}'
 fi
}

check () {
if [ -h ${theme_dir}/theme.css ]; then
    symlink=$(ls -l ${theme_dir} | awk -F "[/]" '/^l/ {print $NF}')
else
    symlink=none
fi
}

switch () {
if [ -h ${theme_dir}/theme.css ]; then
    rm ${theme_dir}/theme.css
fi
if [ "${1}" == "default" ]; then
    return
else
    ln -s ${theme_dir}/$1 ${theme_dir}/theme.css
fi
}

init () {
if [ "$1" ]; then 
    runner | tee $1
    echo -e "\noutout saved to: \e[1;32m$1\e[m\n"
else
    runner
fi
}

runner () {
cat <<-EOFR
{ 
  "name": "Theme switcher",
  "script_path": "/app/scripts/themes.sh",
  "output_format": "terminal",
  "parameters": [
    {
      "name": "Themes available",
      "param": "switch",
      "type": "list",
      "description": "Select visual theme",
      "values": {
        "script": "/app/scripts/themes.sh list",
        "shell": true
      }
    }
  ]
}
EOFR
}

help () {
 sed -ne '/^#$/,/^$/p' $0
}

check 

if [ $# -eq 2 ]; then
    if [ "$1" == "switch" ]; then
        $1 $2
        echo -e "\e[1mManually refresh the page cache by pressing Ctrl + F5\e[m"
    elif [ "$1" == "init" ]; then
        $1 $2
    fi
else
    if [ "$1" == "init" ]; then
        echo -e "\nsave to file by issuing: \e[1;94m${0##/*} init /full-path/to/runners/themes.json\e[m\n"
        $1
    else
        $1
    fi
fi

@FredrikJamshidi
@eimrich