/* -------------------------------------------------------------------------- */
/* Copyright 2016, Joachim Kraftmayer, Clyso GmbH - clyso.com                 */
/*                                                                            */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may    */
/* not use this file except in compliance with the License. You may obtain    */
/* a copy of the License at                                                   */
/*                                                                            */
/* http://www.apache.org/licenses/LICENSE-2.0                                 */
/*                                                                            */
/* Unless required by applicable law or agreed to in writing, software        */
/* distributed under the License is distributed on an "AS IS" BASIS,          */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   */
/* See the License for the specific language governing permissions and        */
/* limitations under the License.                                             */
/* -------------------------------------------------------------------------- */

require 'date'
require 'fileutils'

class Rbdcache
   def self.ls(auth, pool)
        cache_dir = '/tmp/pools/'

        if not File.directory?(cache_dir)
                FileUtils.mkdir_p(cache_dir)
        end

        path= cache_dir + pool
        time_interall_sec = 24 * 60 * 60
        now = Time.now

        if not File.directory?(cache_dir)
                FileUtils.mkdir_p(cache_dir)
        end

        #Check if file exits
        if not File.exist?( path )
                # Cache file not exists
                rbd_ls = `rbd #{auth} ls -p #{pool} --format xml`
                File.open(path, 'w') { |file| file.write(rbd_ls) }
        end

        #check if cache is outdated or not
        file_date = File.mtime( path )
        if now > (file_date + time_interall_sec )
                print "Time now"
                rbd_ls = `rbd #{auth} ls -p #{pool} --format xml`
                File.open(path, 'w') { |file| file.write(rbd_ls) }
        else
                #Cached in File
                rbd_ls = File.read(path)
        end
        return rbd_ls
    end

    def self.info(auth=nil, pool, image)
        cache_dir = '/tmp/pools/info/'

        if not File.directory?(cache_dir)
                FileUtils.mkdir_p(cache_dir)
        end

        cache_dir = cache_dir + pool
        if not File.directory?(cache_dir)
                FileUtils.mkdir_p(cache_dir)
        end

        cache_dir = '/tmp/pools/info/'
        path = cache_dir + image

        time_interall_sec = 24 * 60 * 60
        now = Time.now

        #Check if file exits
        if not File.exist?( path )
                # Cache file not exists
                rbd_info = `rbd #{auth} info -p #{pool} --image #{image} --format xml`
                File.open(path, 'w') { |file| file.write(rbd_info) }
        end

        #check if cache is outdated or not
        file_date = File.mtime( path )
        if now > (file_date + time_interall_sec )
                rbd_info = `rbd #{auth} info -p #{pool} --image #{image} --format xml`
                File.open(path, 'w') { |file| file.write(rbd_info) }
        else
                #Cached in File
                #disabled # rbd_info = `rbd #{auth} info -p #{pool} --image #{image} --format xml`
                rbd_info = File.read(path)
        end
        return rbd_info

    end
end