#!/usr/bin/env ruby

require 'rubygems'
require 'aws/s3'

MAX_BACKUPS = 30

home = File.expand_path("~")

if !File.exists?("#{home}/.s3/access_key")
  STDERR.puts "Access key not found"
  exit 1
end

if !File.exists?("#{home}/.s3/secret_access_key")
  STDERR.puts "Secret access key not found"
  exit 1
end

access_key = open("#{home}/.s3/access_key").read.strip
secret_access_key = open("#{home}/.s3/secret_access_key").read.strip

AWS::S3::Base.establish_connection!(:access_key_id => access_key, :secret_access_key => secret_access_key)

current_backups = AWS::S3::Bucket.find("danbooru-backup").objects.map {|x| x.key}.select {|x| x =~ /^db-/}.sort.reverse

if current_backups.size > MAX_BACKUPS
  current_backups[MAX_BACKUPS..-1].each do |old_backup|
    AWS::S3::S3Object.delete(old_backup, "danbooru-backup")
    puts "Deleted old backup #{old_backup}"
  end
end

backup = Dir["/var/www/danbooru2/shared/backup/db-*.dump"].sort.last
data = File.open(backup, "rb")
filename = data.mtime.strftime("db-%Y-%m-%d-%H-%M")
AWS::S3::S3Object.store(filename, data, "danbooru-backup", :access => :private)
puts "Uploaded #{backup} as #{filename}"