#!/bin/bash
#
# File: feedly-updater.sh
#
# Keep Feedly for Safari nice and fresh by checking for nightly
# updates and installing them
#
#
#  Author: Bob Rudis (hrbrmstr) - twitter.com/hrbrmstr
# Version: 1.0
#    Date: 2009-11-22
#

# in the event you roll your own and don't link to std ones

CURL="/usr/bin/curl"
GREP="/usr/bin/grep"
UNZIP="/usr/bin/unzip"

# where growlnotify is located

GN="/usr/local/bin/growlnotify"

# script config vars

APP_SUPPORT="$HOME/Library/Application Support/Feedly"

LAST_FEEDLY="$APP_SUPPORT/feedly.last"

FEEDLY_ZIP="feedly.zip"
FEEDLY_URL="http://update.feedly.com/release/$FEEDLY_ZIP"

FAVICON_LOCAL="$APP_SUPPORT/Feedly.icns"
FAVICON_URL="http://rudis.net/dl/Feedly.icns"

LAST_GRABBED=""


#
# update_feedly()
#
# Input: the current "Last-Modified" header
#
# grabs the current feedly.zip, extracts it then updates our cached header
# will growl at you as well
#

update_feedly() {

    $CURL --silent --output "$APP_SUPPORT/$FEEDLY_ZIP" "$FEEDLY_URL"
    
    $UNZIP -qq -o -d "$APP_SUPPORT" "$APP_SUPPORT/$FEEDLY_ZIP"
    
    echo $@ > "$LAST_FEEDLY"
    
    if [ -f "$GN" ] ; then
        $GN --message "Feedly Updated" --title "Feedly Updater"
    fi

}

# Create our directory if it doesn't exist

if [ ! -d "$APP_SUPPORT/" ] ; then
    mkdir "$APP_SUPPORT"
fi

# if our Feedly app-support directory is ready and if
# curl exists (it should)

if [ -f "$CURL" ] ; then

    # Get a copy of the favicon if we don't already have it
    
    if [ ! -f "$FAVICON_LOCAL" ] ; then
        $CURL --silent --output "$FAVICON_LOCAL" "$FAVICON_URL"
    fi

    # Get current last modified date from the online Feedly zip

    LAST_UPDATED=`$CURL --silent --output - --head "$FEEDLY_URL" | $GREP "Last-Modified"`

    # if we haven't grabbed Feedly lately

    if [ ! -f "$LAST_FEEDLY" ] ; then

        # init when we started the process and "update" feedly

        update_feedly $LAST_UPDATED
        
     else
    
        # Get when we last-grabbed feedly"
        
        LAST_GRABBED=`cat "$LAST_FEEDLY"`
        
        if [ "$LAST_GRABBED" != "$LAST_UPDATED" ] ; then
            update_feedly $LAST_UPDATED    
        fi
        
    fi

fi