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graph.rb
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graph.rb
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require 'ff'
require 'store'
require 'graphviz'
id = ARGV.shift or raise
class Graph
def initialize(viz, limit = 200)
@id_counter = 0
@id_map = {}
@viz = viz
@limit = limit
@nodes = {}
@edges = {}
end
def node(id, name, opt = {})
return unless id and name
if mapped = map_id(id)
add_node(id, name, mapped, opt.merge(:URL => 'http://friendfeed.com/' + id))
end
end
def force_node(id, name, opt = {})
return unless id and name
mapped = map_id(id, true)
add_node(name, name, mapped, opt)
end
def [](id)
if mapped = map_id(id)
@nodes[mapped]
end
end
def edge(id1, id2, opt = {})
return unless self[id1] and self[id2]
key = [id1, id2].sort
default = {
:arrowhead => 'lnormal',
:len => '0.05',
:tooltip => "#{id1} - #{id2}"
}
@edges[key] ||= @viz.add_edge(self[id1], self[id2], default.merge(opt))
end
def output(*arg)
@viz.output(*arg)
end
private
def add_node(id, name, mapped, opt)
default = {
:label => id,
:tooltip => name,
:shape => 'ellipse',
:style => 'filled',
:fillcolor => 'white',
:margin => '0.01',
:labelfontsize => '14',
:fontsize => '11'
}
@nodes[mapped] ||= @viz.add_node('n_' + mapped, default.merge(opt))
end
def map_id(id, force = false)
@id_map[id] ||= new_id(force)
end
def new_id(force = false)
@id_counter += 1
if force or @limit >= @id_counter
"n_#{@id_counter}"
end
end
end
store = Store.new('db')
opt = {
:type => 'digraph',
:use => 'twopi',
:center => 'true',
:pack => 'true',
:packmode => 'node',
:sep => '1.6',
:overlap => 'false',
:outputorder => 'edgesfirst',
:output => 'svg',
}
viz = GraphViz.new(id, opt)
graph = Graph.new(viz)
include_group = false
store.open(TokyoCabinet::BDB::OREADER) do
graph.node(id, store.name_of(id), :root => 'true', :color => 'yellow', :fillcolor => 'red', :fontcolor => 'yellow')
friends = (store.friends[id] || '').split(',')
subscriptions = (store.subscriptions[id] || '').split(',')
subscribers = (store.subscribers[id] || '').split(',')
groups = (store.groups[id] || '').split(',')
# add all friends
c = 0
friends.each do |e|
unless graph.node(e, store.name_of(e), :color => 'red', :fontcolor => 'red')
c += 1
end
graph.edge(id, e, :color => 'red', :arrowhead => 'none')
end
if c > 0
graph.force_node('ofriends', "other(#{c})", :color => 'red')
graph.edge(id, 'ofriends', :color => 'red', :arrowhead => 'none')
end
if include_group
# add group only if the group is shared with friends
c = 0
groups.each do |e|
members = (store.subscribers[e] || '').split(',')
if members.any? { |f| friends.include?(f) }
unless graph.node(e, store.name_of(e), :color => 'blue', :fontcolor => 'blue', :shape => 'box')
c += 1
end
graph.edge(id, e, :color => 'blue')
end
end
if c > 0
graph.force_node('ogroups', "other(#{c})", :color => 'blue', :shape => 'box')
graph.edge(id, 'ogroups', :color => 'blue')
end
end
# add fof only if the fof is in subscriptions or subscribers
friends.each do |e|
c = 0
fof = (store.friends[e] || '').split(',')
fof.each do |f|
if friends.include?(f) or subscriptions.include?(f) or subscribers.include?(f)
unless graph.node(f, store.name_of(f), :color => 'orange', :fontcolor => 'orange')
c += 1
end
if friends.include?(f)
graph.edge(e, f, :color => 'red', :arrowhead => 'none')
else
graph.edge(e, f, :color => 'orange', :arrowhead => 'none')
end
end
end
if c > 0
graph.force_node('ofof_' + e, "other(#{c})", :color => 'orange')
graph.edge(e, 'ofof_' + e, :color => 'orange')
end
end
# add links for subscriptions
subscriptions.each do |e|
#graph.node(e, store.name_of(e), :color => 'green')
graph.edge(id, e, :color => 'green')
end
# add links for subscriptions of friends
friends.each do |e|
sof = (store.subscriptions[e] || '').split(',')
sof.each do |f|
#graph.node(f, store.name_of(f), :color => 'lightgreen')
graph.edge(e, f, :color => 'lightgreen')
end
end
# no links for subscribers; it pulls fof
=begin
subscribers.each do |e|
#graph.node(e, store.name_of(e), :color => 'yellow')
graph.edge(e, id, :color => 'yellow')
end
=end
# add links for group members
if include_group
groups.each do |e|
members = (store.subscribers[e] || '').split(',')
members.each do |f|
#graph.node(f, store.name_of(f), :color => 'lightblue')
graph.edge(f, e, :color => 'lightblue')
end
end
end
end
graph.output(:file => "#{id}.svg")