Class: RouteC::Query

Inherits:
Object
  • Object
show all
Defined in:
lib/route_c/query.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(station, direction, datetime = nil) ⇒ Query

Returns a new instance of Query.



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# File 'lib/route_c/query.rb', line 3

def initialize(station, direction, datetime = nil)
  @station, @direction, @datetime = station, direction, set_datetime(datetime)
end

Class Method Details

.config ⇒ Object 



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# File 'lib/route_c/query.rb', line 21

def self.config
  YAML.load_file 'config/config.yaml'
end

.num_elements(average, elements = Lights.pins.count) ⇒ Object 



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# File 'lib/route_c/query.rb', line 39

def self.num_elements average, elements = Lights.pins.count
  (elements * (average / 100.0)).round
end

Instance Method Details

#average_occupancy ⇒ Object 



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# File 'lib/route_c/query.rb', line 33

def average_occupancy
  loads = json.first.last
  average = loads.values.inject{ |sum, el| sum + el }.to_f / loads.size
  average.round
end

#json ⇒ Object 



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# File 'lib/route_c/query.rb', line 25

def json
  request = open(url, http_basic_authentication: [
    ENV['SIR_HANDEL_USERNAME'],
    ENV['SIR_HANDEL_PASSWORD']
  ])
  JSON.parse request.read
end

#lights ⇒ Object 



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# File 'lib/route_c/query.rb', line 52

def lights
  @lights ||= Lights.new(to_a)
end

#set_datetime(datetime) ⇒ Object 



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# File 'lib/route_c/query.rb', line 7

def set_datetime(datetime)
  if datetime.nil?
    hour = Time.now.hour
    minute = Time.now.min
    "2015-09-23T#{hour}:#{minute}:00"
  else
    datetime
  end
end

#to_a ⇒ Object 



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# File 'lib/route_c/query.rb', line 43

def to_a
  num = Query.num_elements average_occupancy
  Array.new(Lights.pins.count).each_with_index.map { |k,v| v + 1 <= num ? 1 : 0 }
end

#to_lights ⇒ Object 



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# File 'lib/route_c/query.rb', line 48

def to_lights
  lights.turn_on
end

#url ⇒ Object 



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# File 'lib/route_c/query.rb', line 17

def url
  "#{Query.config['base_url']}#{@direction}/#{@station}/#{@datetime}.json"
end