Tracks recently obsessed with using Last.fm library

obs.sh

#!/bin/bash
# Written by Yu-Jie Lin
# Public Domain
#
# Check Last.fm library to see what recent tracks has been played consecutively
# for three times at least.
#
# Usage: obs.sh APIKEY USERNAME

if (( $# != 2 )); then
  echo 'obs.sh APIKEY USERNAME' >&2
  exit 1
fi

MIN_COUNT=3
API_URL="http://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&user=$2&api_key=$1&limit=200"

cat <(wget -q -O - "$API_URL&page=1") \
    <(wget -q -O - "$API_URL&page=2") \
    <(wget -q -O - "$API_URL&page=3") \
    <(wget -q -O - "$API_URL&page=4") \
    <(wget -q -O - "$API_URL&page=5") |
sed -n '/url/ s/ *<url>\(.*\)<\/url>/\1/p' |
awk -v min_count=$MIN_COUNT '
BEGIN {
  url = "";
  count = 0;
}
{
  if (url == $0) {
    count++;
  } else {
    // only show the url when more than min_count consecutive play
    if (count > min_count)
      printf("%3d %s\n", count, url);
    url = $0;
    count = 1;
  }
}
END {
  if (count > min_count)
    printf("%3d %s\n", count, url);
}
'