#!/usr/bin/ruby
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##  Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3      ##
##  Please see: http://www.gnu.org/licenses/gpl.html for legal details,  ##
##  rights of fair usage, the disclaimer and warranty conditions.        ##
###########################################################################

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#                             CONFIGURATION                               #
###########################################################################
ACCESS_TOKEN="CBANDsD5FkXweAwyvutwqnjbE4nfZBBkfXUCvNHLBZAURZCKqYuXu54ZB46fhtUupaou3lG0xUYIcik9DMPbSJpyeGbOFGNLjleoJy1kiNIrtwcKyjrj0xmZAQTMR5vZCKvRUjYL8Y9lirIVVdUOBe6QhFRNyAp4QWqZC18IlaUEDXmwczXYhcK1"

###########################################################################
#                                INTERNALS                                #
###########################################################################

require "koala"
require "json"

# Get the friends list through Koala.
@graph = Koala::Facebook::API.new(ACCESS_TOKEN)
friends = @graph.get_connections(
  "me", 
  "invitable_friends",
  {
      limit: 5000
  }
)

# Read the friends stored in the script.
store = Array.new
mark = false
File.open(File.expand_path(__FILE__), "r") do | s |
    s.each_line do | line |
        if line.start_with? "# FACEBOOK FRIENDS LIST"
            mark = true
            next
        end
        if mark
            store.push line.split('#').last.strip
        end
    end
end
store = store.sort

# Get the new list of friends.
fetch = Array.new
friends.each do | f |
    fetch.push f["name"]
end
fetch = fetch.sort

# Check for friends that are no longer friends.
store.each do | f |
    if !fetch.include? f
        puts f + " " + "is no longer your friend."
    end
end

# Check for newly added friends.
fetch.each do | f |
    if !store.include? f
        puts f + " " + "is a new friend."
    end
end

# Read the entire script up to the friends marker
script = Array.new
File.open(File.expand_path(__FILE__), "r") do | s |
    s.each_line do | line |
        if line.start_with? "# FACEBOOK FRIENDS LIST"
            break;
        end
        script.push line
    end
end

# Write the script back to the file
File.open(File.expand_path(__FILE__), "w") do |s|
    script.each do | line |
        s.write line
    end
    # And append the new friends
    s.write "# FACEBOOK FRIENDS LIST" + "\n"
    fetch.each do  |f |
        s.write "#" + " " + f + "\n"
    end
end

puts "You have a total of: " + fetch.length.to_s + " friends."

### Here we store the previous list of friends
# FACEBOOK FRIENDS LIST