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|
#! /usr/bin/env ruby
# -*- coding: UTF-8 -*-
#
# Copyright 2012 Jérémy Zurcher <jeremy@asynk.ch>
#
# This file is part of edoors-ruby.
#
# edoors-ruby is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# edoors-ruby is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with edoors-ruby. If not, see <http://www.gnu.org/licenses/>.
require 'time'
#
module Edoors
#
class Particle
#
def initialize o={}
@ts = Time.now # creation time
@src = nil # Iota where it's originated from
@dst = nil # Iota where it's heading to
@room = nil # Room path part of the current destination
@door = nil # Door path part of the current destination
@action = nil # action part of the current destination
@link_value = nil # the value computed with the link_fields values extracted from the payload
# used for pearing Particles in Boards and linking in routing process
@dsts = [] # fifo of path?action strings where to travel to
@link_fields = [] # the fields used to generate the link value
@payload = {} # the actual data carried by this particle
@merged = [] # list of merged particles
#
if not o.empty?
@ts = Time.parse(o['ts']) if o['ts']
@room = o['room']
@door = o['door']
@action = o['action']
@payload = o['payload']||{}
@src = o['spin'].search_down o['src'] if o['src']
@dst = o['spin'].search_down o['dst'] if o['dst']
o['dsts'].each do |dst| add_dsts dst end if o['dsts']
set_link_fields *o['link_fields'] if o['link_fields']
o['merged'].each do |particle|
merge! Particle.json_create(particle.merge!('spin'=>o['spin']))
end if o['merged']
end
end
#
def to_json *a
{
'kls' => self.class.name,
'ts' => @ts,
'src' => (@src ? @src.path : nil ),
'dst' => (@dst ? @dst.path : nil ),
'room' => @room,
'door' => @door,
'action' => @action,
'dsts' => @dsts,
'link_fields' => @link_fields,
'payload' => @payload,
'merged' => @merged
}.to_json *a
end
#
def self.json_create o
raise Edoors::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
self.new o
end
#
# called when released
def reset!
@ts = @src = @dst = @room = @door = @action = @link_value = nil
@dsts.clear
@link_fields.clear
@payload.clear
@merged.clear
end
#
# called when sent
def init! src
@src = src
@ts = Time.now
@dst = @room = @door = @action = nil
end
#
attr_reader :ts, :src, :dst, :room, :door, :action, :link_value, :payload
#
# routing
#
def next_dst
@dsts[0]
end
#
def clear_dsts!
@dsts.clear
end
#
def add_dsts dsts
dsts.split(Edoors::LINK_SEP).each do |dst|
if dst.empty? or dst[0]==Edoors::PATH_SEP or dst[0]==Edoors::PATH_SEP or dst=~/\/\?/\
or dst=~/\/{2,}/ or dst=~/\s+/ or dst==Edoors::ACT_SEP
raise Edoors::Exception.new "destination #{dst} is not acceptable"
end
@dsts << dst
end
end
#
def add_dst a, d=''
add_dsts d+Edoors::ACT_SEP+a
end
#
def set_dst! a, d
@action = a
if d.is_a? Edoors::Iota
@dst = d
else
_split_path! d
end
end
#
def split_dst!
@dst = @room = @door = @action = nil
return if (n = next_dst).nil?
p, @action = n.split Edoors::ACT_SEP
_split_path! p
end
#
def _split_path! p
i = p.rindex Edoors::PATH_SEP
if i.nil?
@room = nil
@door = p
else
@room = p[0..i-1]
@door = p[i+1..-1]
end
@door = nil if @door.empty?
end
private :_split_path!
#
def dst_routed! dst
@dst = dst
@dsts.shift
end
#
def error! e, dst=nil
@action = Edoors::ACT_ERROR
@dst = dst||@src
@payload[Edoors::FIELD_ERROR_MSG]=e
end
#
def apply_link! lnk
init! lnk.door
clear_dsts!
add_dsts lnk.dsts
set_link_fields lnk.fields
end
#
# data manipulation
#
def []= k, v
@payload[k]=v
compute_link_value! if @link_fields.include? k
end
#
def set_data k, v
@payload[k] = v
compute_link_value! if @link_fields.include? k
end
#
def [] k
@payload[k]
end
#
def get_data k
@payload[k]
end
alias :data :get_data
#
def clone_data p
@payload = p.payload.clone
end
#
# link value and fields
#
def set_link_fields *args
@link_fields.clear if not @link_fields.empty?
args.compact!
args.each do |lfs|
lfs.split(',').each do |lf|
@link_fields << lf
end
end
compute_link_value!
end
#
def compute_link_value!
@link_value = @link_fields.inject('') { |s,lf| s+=@payload[lf].to_s if @payload[lf]; s }
end
#
# merge particles management
#
def merge! p
@merged << p
end
#
def merged i
@merged[i]
end
#
def merged_shift
@merged.shift
end
#
def clear_merged!
@merged.clear
end
#
end
#
end
#
# EOF
|
