social skills failure ;) evendoors-ruby is renamed into iotas

1 files changed, 213 insertions, 0 deletions

diff --git a/lib/iotas/particle.rb b/lib/iotas/particle.rb
new file mode 100644
index 0000000..ffb141b
--- /dev/null
+++ b/lib/iotas/particle.rb
@@ -0,0 +1,213 @@
+#! /usr/bin/env ruby
+# -*- coding: UTF-8 -*-
+#
+# Copyright 2012 Jérémy Zurcher <jeremy@asynk.ch>
+#
+# This file is part of iotas.
+#
+# iotas 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.
+#
+# iotas 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 iotas.  If not, see <http://www.gnu.org/licenses/>.
+
+require 'time'
+#
+module Iotas
+    #
+    class Particle
+        #
+        def initialize o={}
+            @ts = Time.now      # creation time
+            @src = nil          # Spot where it's originated from
+            @dst = nil          # Spot 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 Iotas::Exception.new "JSON #{o['kls']} != #{self.name}" if o['kls'] != self.name
+            self.new o
+        end
+        #
+        def reset!
+            @ts = Time.now
+            @src = @dst = @room = @door = @action = @link_value = nil
+            @dsts.clear
+            @link_fields.clear
+            @payload.clear
+            @merged.clear
+        end
+        #
+        attr_accessor :src
+        attr_reader :ts, :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(Iotas::LINK_SEP).each do |dst|
+                if dst.empty? or dst[0]==Iotas::PATH_SEP or dst[0]==Iotas::PATH_SEP  or dst=~/\/\?/\
+                    or dst=~/\/{2,}/ or dst=~/\s+/ or dst==Iotas::ACT_SEP
+                    raise Iotas::Exception.new "destination #{dst} is not acceptable"
+                end
+                @dsts << dst
+            end
+        end
+        #
+        def set_dst! a, d=''
+            @dst = @room = @door = @action = nil
+            clear_dsts!
+            add_dsts d+Iotas::ACT_SEP+a
+        end
+        #
+        def split_dst!
+            @dst = @room = @door = @action = nil
+            return if (n = next_dst).nil?
+            p, @action = n.split Iotas::ACT_SEP
+            i = p.rindex Iotas::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
+        #
+        def dst_routed! dst
+            @dst = dst
+            @dsts.shift
+        end
+        #
+        def error! e, dst=nil
+            @action = Iotas::ACT_ERROR
+            @dst = dst||@src
+            @payload[Iotas::FIELD_ERROR_MSG]=e
+        end
+        #
+        def apply_link! lnk
+            @src = 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