Class: ActiveRoad::Path

Inherits:
Object
  • Object
show all
Defined in:
app/models/active_road/path.rb

Overview

A path is a link between differents objects : 

- Departure
- Arrival

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Path

Returns a new instance of Path.



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# File 'app/models/active_road/path.rb', line 9

def initialize(attributes = {})
  attributes.each do |k, v|
    send("#{k}=", v)
  end
end

Instance Attribute Details

#arrival ⇒ Object

Returns the value of attribute arrival.



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# File 'app/models/active_road/path.rb', line 6

def arrival
  @arrival
end

#departure ⇒ Object

Returns the value of attribute departure.



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# File 'app/models/active_road/path.rb', line 6

def departure
  @departure
end

#physical_road ⇒ Object Also known as: road

Returns the value of attribute physical_road.



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# File 'app/models/active_road/path.rb', line 6

def physical_road
  @physical_road
end

Class Method Details

.all(departure, arrivals, physical_road) ⇒ Object 



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# File 'app/models/active_road/path.rb', line 40

def self.all(departure, arrivals, physical_road)
  Array(arrivals).collect do |arrival|
    new :departure => departure, :arrival => arrival, :physical_road => physical_road
  end
end

Instance Method Details

#==(other) ⇒ Object Also known as: eql? 



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# File 'app/models/active_road/path.rb', line 105

def ==(other)
  [:departure, :arrival, :physical_road].all? do |attribute|
    other.respond_to?(attribute) and send(attribute) == other.send(attribute)
  end
end

#geometry_with_cache ⇒ Object Also known as: geometry 



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# File 'app/models/active_road/path.rb', line 95

def geometry_with_cache
  @geometry ||= geometry_without_cache
end

#geometry_without_cache ⇒ Object 



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# File 'app/models/active_road/path.rb', line 56

def geometry_without_cache
  # sorted_locations_on_road = locations_on_road.sort
  # reverse = (sorted_locations_on_road != locations_on_road)
  # geometry = road.line_substring(sorted_locations_on_road.first, sorted_locations_on_road.last)
  # geometry = geometry.reverse if reverse
  # geometry

  points =  physical_road.geometry.points
  points_selected = []

  if ActiveRoad::AccessPoint === departure || ActiveRoad::AccessPoint === arrival
    sorted_locations_on_road = locations_on_road.sort    
    reverse = (sorted_locations_on_road != locations_on_road)
    
    if sorted_locations_on_road == [0, 1]
      if reverse
        return physical_road.geometry.reverse
      else
        return physical_road.geometry
      end
    end
    
    return road.line_substring(sorted_locations_on_road.first, sorted_locations_on_road.last)
  end

  departure_index = points.index(departure.geometry)
  arrival_index = points.index(arrival.geometry)
  
  if departure_index < arrival_index
    points_selected = points[arrival_index..departure_index]
  elsif arrival_index < departure_index
    points_selected = points.reverse![arrival_index..departure_index]
  else
    raise StandardError, "Junction is not on the physical road"
  end

  GeoRuby::SimpleFeatures::LineString.from_points(points)
end

#hash ⇒ Object 



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# File 'app/models/active_road/path.rb', line 112

def hash
  [departure, arrival, physical_road].hash
end

#length_in_meter ⇒ Object 



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# File 'app/models/active_road/path.rb', line 31

def length_in_meter
  length_on_road * road.length_in_meter
end

#length_on_road ⇒ Object 



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# File 'app/models/active_road/path.rb', line 35

def length_on_road
  begin_on_road, end_on_road = locations_on_road.sort
  end_on_road - begin_on_road
end

#locations_on_road ⇒ Object 



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# File 'app/models/active_road/path.rb', line 19

def locations_on_road
  [departure, arrival].collect do |endpoint|
    location =
      if ActiveRoad::AccessPoint === endpoint
        road.locate_point endpoint.geometry
      else
        endpoint.location_on_road road
      end
    location = [0, [location, 1].min].max
  end
end

#name ⇒ Object 



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# File 'app/models/active_road/path.rb', line 15

def name
  "Path : #{departure} -> #{arrival}"
end

#paths ⇒ Object 



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# File 'app/models/active_road/path.rb', line 48

def paths
  arrival.paths - [reverse]
end

#reverse ⇒ Object 



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# File 'app/models/active_road/path.rb', line 52

def reverse
  self.class.new :departure => arrival, :arrival => departure, :physical_road => physical_road
end

#to_s ⇒ Object 



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# File 'app/models/active_road/path.rb', line 101

def to_s
  name
end