Take the formatted output of `mpc status` and convert it into JSON...

_README_.md

MPC Status as JSON

Take the formatted output of mpc status and convert it to JOSN.

Why?

I'm running Übersicht and made some tweaks to another users mpd widget. The existing implementation used awk and echoed values concatenating them together with @. Then in JS/Coffeescript parsing the string on @ and accessing the values based on expected position. It occurred to me it would be more convenient to use JSON in Übersicht so I created this.

Usage

By default mpc status return something like this:

❯  mpc status
I'm With Her - Ain't The Fine
[paused]  #3/12   2:38/3:09 (83%)
volume: 64%   repeat: off   random: off   single: off   consume: off

This script will return results like this:

❯  ./mpc-status-json.sh
{
  "artist":             "I'm With Her",
  "song":               "Ain't The Fine",
  "elapsed":            "2:38/3:09",
  "currentTime":        "2:38",
  "trackLength":        "3:09",
  "currentTrackNumber": "3",
  "totalTrackCount":    "12",
  "status":             "[paused]",
  "trackCount":         "",
  "volume":             "64%"
}

Then in a JS environment simply parse the resulting string. For example in Übersicht:

update: (output, domEl) ->
  details = JSON.parse(output);
  
  $(domEl).find('#artist').text(details.artist)
  ...

mpc-status-json.sh

#! /usr/bin/env bash

STATUS="$(/usr/local/bin/mpc status)"

if [ $(echo "$STATUS" | wc -l | tr -d ' ') == "1" ]; then
  status="[empty]"
else
  artist=$(echo "$STATUS"      | awk -F" - " 'NR==1{print $1}')
  song=$(echo "$STATUS"        | awk -F" - " 'NR==1{print $2}')
  status=$(echo "$STATUS"      | awk         'NR==2{print $1}')

  track_data=$(echo "$STATUS" | awk         'NR==2{print $2}')
  current_track_number=$(echo "$track_data" | awk -F"/" '{print $1}')
  total_track_count=$(echo "$track_data"    | awk -F"/" '{print $2}')

  elapsed=$(echo "$STATUS" | awk 'NR==2{print $3}')
  current_time=$(echo "${elapsed}" | awk -F"/" '{print $1}')
  track_length=$(echo "${elapsed}" | awk -F"/" '{print $2}')

  volume=$(
    echo "$STATUS" \
      | awk -F":" 'NR==3{print $2}' \
      | awk '{print $1}'
  )
fi

echo "{
  \"artist\":             \"${artist}\",
  \"song\":               \"${song}\",
  \"elapsed\":            \"${elapsed}\",
  \"currentTime\":        \"${current_time}\",
  \"trackLength\":        \"${track_length}\",
  \"currentTrackNumber\": \"${current_track_number/\#/}\",
  \"totalTrackCount\":    \"${total_track_count}\",
  \"status\":             \"${status}\",
  \"volume\":             \"${volume}\"
}"