Hack:addrandom

From Music Player Daemon Community Wiki

Use this bit of code to randomly add songs to what is currently playing. Anyone know how to adjust for weighted playlists?

• Code

#!/bin/bash
#evildick:04:24:2006

mpddb=/var/lib/mpd/database

addrandom() {
tempfile=`tempfile 2>/dev/null` || tempfile=/tmp/temp$$
trap "rm -f $tempfile" 0 1 2 5 15

tempfile1=`tempfile 2>/dev/null` || tempfile1=/tmp/temp1$$
trap "rm -f $tempfile1" 0 1 2 5 15

sed 's/ /^/g' $mpddb > $tempfile
getdbfile="$(cat $tempfile | grep file | cut -c 7-)"

dbfile=($getdbfile)
num_dbfile=${#dbfile[*]}
echo "${dbfile[$((RANDOM%num_dbfile))]}" > $tempfile
sed 's/\^/ /g' $tempfile > $tempfile1
mpc add "$(cat $tempfile1)"
}

addrandom

---

I made a similar script, the main difference is in how we select the songs (array vs. text file + tools), but I made mine so you can pass an integer argument to it and have it add that number of songs. But I have nothing for weighted playlists.

• Code

#!/bin/bash
# gunnihinn @ 19.11.2007

hjalp ()
{
    echo "Usage: addRandom [OPTION]... [INTEGER]..."
    echo "Adds INTEGER numer of randomly selected songs"
    echo "to the current mpd playlist."
    echo " "
    echo "  -h,  --help            Display this help"
}

# Make sure the input argument is an integer. 
# Set number $num of songs to be added.
if [ $# -eq 0 ]; then
    hjalp
    exit
elif [ $1 = "--help" -o $1 = "-h" ]; then
    hjalp
    exit
else
    if [ `echo $1 | grep [^0-9]` ]; then
	echo "Error: Argument not an integer. Exiting."
	exit
    else
	num=$1
    fi
fi

# Get all song file names in database. 
# We borrow a file in /tmp
mpc listall > /tmp/songs.tmp
numSongs=`wc -l /tmp/songs.tmp | sed "s/ \/tmp\/songs.tmp//"` 

if [ $numSongs -eq 0 ]; then
    echo "Error: No songs in database." 
    rm /tmp/songs.tmp
    exit
fi

# Add all songs if $num is too big
if [ $num -gt $numSongs ]; then
    num=$numsongs
fi

for (( i = 1; i <= $num; i++ ))
do
    songnr=`expr 1 + $RANDOM % $numSongs`
    song=`cat /tmp/songs.tmp | head -n $songnr | tail -n 1`
    # Don't add the same song twice, fix number of songs
    mpc add $song && sed -i "\^$song^d" /tmp/songs.tmp && numSongs=`expr $numSongs - 1`
done

# Make it squeaky clean
rm /tmp/songs.tmp