MPR Classical Daily Download Downloader

mprdailydownload.sh

#!/bin/bash
#
# https://www.yourclassical.org/topics/daily-download
# Downloads an MPR Classical "Daily Download" mp3 file
# to $HOME/music/mprdailydownload.
# Supply a date argument as YYYY-MM-DD for a specific date's download
# or omit the argument for today's download.
#
# If the command `ffprobe` (from `ffmpeg`) is available, the file will be renamed as
# YYYYMMDD-Composer_composer-Title-title.mp3
#
# Example cron entry (every weekday morning at 7am), with logfile
# 0 7 * * 1-5 /path/to/mprdailydownload.sh >> /path/to/mprdailydownload.log 2>&1
#
# USAGE:

downloads_dir=$HOME/music/mprdailydownload

# Accepts a date argument as YYYY-MM-DD or defaults to today
date=${1:-today}

filedate=$(date -d "$date" +%Y%m%d)
# URL root
root="https://play.publicradio.org/web/o/minnesota/classical/programs/free-downloads/"
downloadfile="$(date -d "$date" +%Y/%m/%d)/daily_download_${filedate}_128.mp3"
savefile="${downloads_dir}/mprdailydownload_$(basename $downloadfile)"
mkdir -p $downloads_dir

# Download via wget
wget -nv -O "$savefile" "${root}${downloadfile}"

# Rename the file with composer-title if ffprobe from ffmepg is available
# Originally used id3info, but that fails to read some tag formats
# ffprobe seems more reliable, and might be more widely available anyway.
if [ "$(command -v ffprobe)" ]
then
  # Retrieve individual id3 tag frames, replace space with underscores, trim leading _
  #composer=$(id3info $savefile | grep TCOM | cut -d: -f2- | tr ' ' '_' |sed -e 's/^_//g')
  composer=$(ffprobe $savefile 2>&1 | grep -e 'composer \+: ' | cut -d: -f2 | tr ' ' _ | sed -e 's/^_//g')
  #title=$(id3info $savefile | grep TIT2 | cut -d: -f2- | tr ' ' '_' | sed -e 's/^_//g')
  title=$(ffprobe $savefile 2>&1 | grep -e 'title \+: ' | cut -d: -f2 | tr ' ' _ | sed -e 's/^_//g')

  metaname="${filedate}-${composer}-${title}-128.mp3"
  echo "Renaming $(basename $savefile) to ${metaname}..."
  mv "$savefile" "${downloads_dir}/${metaname}"
fi

# Michael Berkowski, 2019
# GitHub @mberkowski
# Special thanks to MPR Classical for providing the daily download