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route_element.rb
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route_element.rb
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class RouteElement < ActiveRecord::Base
attr_accessible :real_distance, :real_d_elevation, :waypoint_start_id, :waypoint_finish_id
belongs_to :route
belongs_to :start, foreign_key: 'waypoint_start_id', class_name: 'Waypoint'
belongs_to :finish, foreign_key: 'waypoint_finish_id', class_name: 'Waypoint'
before_save :distance
# Recalculate distance
def calculate_distance
self.start.distance_to(self.finish)
end
def calculate_elevation
self.finish.elevation - self.start.elevation
end
def distance
self.distance = calculate_distance
super
end
def d_elevation
self.d_elevation = calculate_elevation
super
end
# List of waypoints for new route element: all from area or finish
# waypoint from last route element
def continue_waypoints_start
last_route_element = self.route.route_elements.last
if last_route_element
return [last_route_element.finish]
else
return self.route.area.waypoints
end
end
# List of waypoints for new route element: all from area or all except
# finish waypoint from last route element with proper order
def continue_waypoints_finish
last_route_element = self.route.route_elements.last
if last_route_element
_last_finish = last_route_element.finish
_all_waypoints = self.route.area.waypoints
# remove
_all_waypoints -= [_last_finish]
# add distance
_all_waypoints.each do |w|
w.tmp_distance = w.distance_to(_last_finish)
end
# and sort
_all_waypoints = _all_waypoints.sort{|a,b| a.tmp_distance <=> b.tmp_distance}
return _all_waypoints
else
return self.route.area.waypoints
end
end
end