#!/bin/bash
#
# Post a link to a scuttle service.
#

# Thanks https://gist.github.com/cdown/1163649
function urlencode() {
  # urlencode <string>
  old_lc_collate=$LC_COLLATE
  LC_COLLATE=C
  
  local length="${#1}"
  for (( i = 0; i < length; i++ )); do
    local c="${1:i:1}"
    case $c in
      [a-zA-Z0-9.~_-]) printf "$c" ;;
      *) printf '%%%02X' "'$c" ;;
    esac
  done
  
  LC_COLLATE=$old_lc_collate
}

# Parameters
BASENAME="`basename $0`"
URL="$1"
TAGS="$2"
shift 2
DESC="$*"
TMP="${TMP:=/tmp}"

# Syntax
if [ -z "$TAGS" ]; then
  echo "usage: $BASENAME <url> <tags> <description>"
  exit
fi

# Config
source "$HOME/.custom/scuttle" || exit 1

# See http://www.wired.com/2010/02/using_the_delicious_api/
CALL="$SCUTTLE_URL/api/posts/add?url=`urlencode $URL`"

# Tags
TAGS="`echo $TAGS | sed -e 's/,/ /g'`"
TAGS="`urlencode "$TAGS"`"
TAGS="`echo $TAGS | sed -e 's/%2C/,/g'`"
CALL="$CALL&tags=$TAGS"

# Description
if [ -z "$DESC" ]; then
  DESC="`curl -s $URL | grep -i "<title>" | sed -e 's|<title>\(.*\)</title>|\1|' 2> /dev/null`"
  echo "Fetched description: $DESC"
fi

# Full API call
CALL="$CALL&description=`urlencode "$DESC"`"

# Write config
CONF="`mktemp -t scuttle.XXXXXXXXXX -p $TMP`"
echo "url = $CALL" > $CONF
echo "user = $SCUTTLE_USER:$SCUTTLE_PASS" >> $CONF

# Call curl
curl -s -K $CONF &> /dev/null

# Status
STATUS="$?"

# Teardown
rm $CONF
exit $STATUS