dzr-id3

#!/bin/sh
# USAGE Example:
# ./dzr-tag 5404528 tagMe.mp3

SNG_ID=$(echo "$1" | tr -dc '0-9') # extract id from path,url,...
if [ -z "$SNG_ID" -o ! -f "$2" ]; then
    echo "USAGE: dzr-id3 5404528 target.mp3" && exit 1
fi

FETCH=${FETCH:-curl -s} # FETCH="wget -q -O -" or FETCH="curl -s -k"
gw () {
  method="$1"; session="$2" ;apiToken="$3" ; shift 3 # curl args ...
  $FETCH "https://www.deezer.com/ajax/gw-light.php?method=$method&input=3&api_version=1.0&api_token=$apiToken" --header "Cookie: sid=$session" "$@"
}

DZR_URL="www.deezer.com/ajax/gw-light.php?method=deezer.ping&api_version=1.0&api_token"
DZR_SID=$($FETCH "$DZR_URL" | jq -r .results.SESSION)
USR_NFO=$(gw deezer.getUserData "$DZR_SID" "$API_TOK")
USR_TOK=$(printf "%s" "$USR_NFO" | jq -r .results.USER_TOKEN)
USR_LIC=$(printf "%s" "$USR_NFO" | jq -r .results.USER.OPTIONS.license_token)
API_TOK=$(printf "%s" "$USR_NFO" | jq -r .results.checkForm)
SNG_NFO=$(gw song.getListData "$DZR_SID" "$API_TOK" --data "{\"sng_ids\":[$SNG_ID]}")

# extract ID3 field we need
ART_NAME=$(echo "${SNG_NFO}" | jq -r .results.data[0].ART_NAME)
REL_DATE=$(echo "${SNG_NFO}" | jq -r .results.data[0].PHYSICAL_RELEASE_DATE) # TODO: sometimes 0000-00-00
SNG_TITLE=$(echo "${SNG_NFO}" | jq -r .results.data[0].SNG_TITLE)
ALB_TITLE=$(echo "${SNG_NFO}" | jq -r .results.data[0].ALB_TITLE)
TRK_NUMBR=$(echo "${SNG_NFO}" | jq -r .results.data[0].TRACK_NUMBER)
ALB_PICTURE=$(echo "${SNG_NFO}" | jq -r .results.data[0].ALB_PICTURE)
APICNAME=".$ALB_PICTURE.jpg"
$FETCH "https://e-cdn-images.dzcdn.net/images/cover/$ALB_PICTURE/1024x1024-000000-100-0-0.jpg" > "$APICNAME"
FILENAME="$ART_NAME - $SNG_TITLE.mp3"
# eyeD3 mid3/mutagen (both python lib) seems to be the only one supporting APIC tag
# contact me if you find a dependency-less widely-available id3tag editor
eyeD3 \
  --artist "$ART_NAME" \
  --title "$SNG_TITLE" \
  --album "$ALB_TITLE" \
  --track "$TRK_NUMBR" \
  --release-date "$REL_DATE" \
  --add-image "$APICNAME:FRONT_COVER" \
  "$2" &&
rm "$APICNAME" &&
mv "$2" "$FILENAME"