Class: SGS::Mission

Inherits:
Object
  • Object
show all
Defined in:
lib/sgs/mission.rb

Overview

Handle a specific mission.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Mission

Create the attractors and repellors as well as the track array and other items.



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# File 'lib/sgs/mission.rb', line 57

def initialize
  @title = nil
  @url = nil
  @description = nil
  @launch_site = nil
  @launch_location = nil
  @attractors = []
  @repellors = []
  @status = MissionStatus.load
  super
end

Instance Attribute Details

#attractors ⇒ Object

Returns the value of attribute attractors.



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# File 'lib/sgs/mission.rb', line 52

def attractors
  @attractors
end

#description ⇒ Object

Returns the value of attribute description.



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# File 'lib/sgs/mission.rb', line 50

def description
  @description
end

#launch_location ⇒ Object

Returns the value of attribute launch_location.



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# File 'lib/sgs/mission.rb', line 51

def launch_location
  @launch_location
end

#launch_site ⇒ Object

Returns the value of attribute launch_site.



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# File 'lib/sgs/mission.rb', line 51

def launch_site
  @launch_site
end

#repellors ⇒ Object

Returns the value of attribute repellors.



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# File 'lib/sgs/mission.rb', line 52

def repellors
  @repellors
end

#status ⇒ Object

Returns the value of attribute status.



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# File 'lib/sgs/mission.rb', line 52

def status
  @status
end

#title ⇒ Object

Returns the value of attribute title.



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# File 'lib/sgs/mission.rb', line 50

def title
  @title
end

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/sgs/mission.rb', line 50

def url
  @url
end

Class Method Details

.daemon ⇒ Object

Main daemon function (called from executable)



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# File 'lib/sgs/mission.rb', line 71

def self.daemon
  puts "Mission management system starting up..."
  #
  # Load the mission data from Redis and augment it with the
  # contents of the mission file.
  config = Config.load
  mission = Mission.file_load config.mission_file
  nav = Navigate.new(mission)
  otto = Otto.load
  #
  # Keep running in our mission state, forever.
  while true do
    if mission.status.active?
      #
      # Listen for GPS data. When we have a new position, call the
      # navigation code to determine a new course to sail (currently
      # a compass course), and set the Otto register accordingly.
      # Repeat until we run out of waypoints.
      GPS.subscribe do |count|
        puts "Mission received new GPS count: #{count}"
        new_course = nav.navigate
        if new_course.nil?
          mission.status.completed!
          break
        end
        mission.status.save
        compass = Bearing.rtox(new_course.heading)
        otto.set_register(Otto::COMPASS_HEADING_REGISTER, compass)
      end
    else
      sleep 60
      mission.status.load
    end
  end
end

.file_load(filename) ⇒ Object

Load a new mission from the missions directory.



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# File 'lib/sgs/mission.rb', line 109

def self.file_load(filename)
  parse YAML.load(File.open(filename))
end

.parse(data) ⇒ Object

Load a new mission from the missions directory.



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# File 'lib/sgs/mission.rb', line 115

def self.parse(data)
  mission = new
  mission.parse(data)
  mission
end

Instance Method Details

#parse(data) ⇒ Object

Parse mission data from a hash.



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# File 'lib/sgs/mission.rb', line 123

def parse(data)
  @title = data["title"] || "Untitled Mission"
  @url = data["url"]
  @description = data["description"]
  if data["launch"]
    @launch_site = data["launch"]["site"] || "Launch Site"
    @launch_location = Location.new
    @launch_location.parse_hash data["launch"]
  end
  if data["attractors"]
    data["attractors"].each do |waypt_data|
      waypt = Waypoint.parse(waypt_data)
      waypt.attractor = true
      @attractors << waypt
    end
  end
  if data["repellors"]
    data["repellors"].each do |waypt_data|
      waypt = Waypoint.parse(waypt_data)
      waypt.attractor = false
      @repellors << waypt
    end
  end
end

#to_hash ⇒ Object

 Convert the mission into a hash



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# File 'lib/sgs/mission.rb', line 156

def to_hash
  hash = {"title" => @title}
  hash["url"] = @url if @url
  hash["description"] = @description if @description
  if @launch_location
    hash["launch"] = @launch_location.to_hash
    hash["launch"]["site"] = @launch_site
  end
  hash["attractors"] = []
  @attractors.each do |waypt|
    hash["attractors"] << waypt.to_hash
  end
  hash["repellors"] = []
  hash
end

#to_yaml ⇒ Object

Return a YAML string from the mission data



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# File 'lib/sgs/mission.rb', line 150

def to_yaml
  to_hash.to_yaml
end