Class: Caltrain

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

Constant Summary collapse

TIMES_PATH = 
'data/google_transit/stop_times.txt'
TRIPS_PATH = 
'data/google_transit/trips.txt'

Class Method Summary collapse

Class Method Details

.abbrevs ⇒ Object 



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# File 'lib/caltrain.rb', line 46

def abbrevs
  {
    :tt  => "22nd Street",
    :ath => "Atherton",
    :bsh => "Bayshore",
    :bel => "Belmont",
    :bhl => "Blossom Hill",
    :bdw => "Broadway",
    :brl => "Burlingame",
    :cal => "California Ave",
    :cap => "Capitol",
    :clp => "College Park",
    :gil => "Gilroy",
    :hay => "Hayward Park",
    :hil => "Hillsdale",
    :law => "Lawrence",
    :men => "Menlo Park",
    :mil => "Millbrae",
    :mrg => "Morgan Hill",
    :mv  => "Mountain View",
    :pa  => "Palo Alto",
    :rc  => "Redwood City",
    :sa  => "San Antonio",
    :sb  => "San Bruno",
    :scl => "San Carlos",
    :sf  => "San Francisco",
    :sj  => "San Jose",
    :smt => "San Martin",
    :sm  => "San Mateo",
    :sc  => "Santa Clara",
    :ssf => "So. San Francisco",
    :sv  => "Sunnyvale",
    :tam => "Tamien"
  }
end

.actions ⇒ Object 



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# File 'lib/caltrain.rb', line 100

def actions
  { :list => :upcoming_departures, :next => :next_departure }
end

.all_times ⇒ Object 



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# File 'lib/caltrain.rb', line 30

def all_times
  @all_times ||= File.read(TIMES_PATH).split(/[\n\r]+/)[1..-1].map { |line| line.gsub('"', '').split(/,+/) }
end

.all_trips ⇒ Object 



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# File 'lib/caltrain.rb', line 34

def all_trips
  @all_trips ||= File.read(TRIPS_PATH).split(/[\n\r]+/)[1..-1].map { |line| line.gsub('"', '').split(/,+/) }.sort
end

.clean! ⇒ Object 



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# File 'lib/caltrain.rb', line 104

def clean!
  instance_variables.each { |i| instance_variable_set(i, nil) }
  true
end

.next_departure(loc, dir) ⇒ Object 



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# File 'lib/caltrain.rb', line 10

def next_departure(loc, dir)
  times(loc, dir).find { |time| time > now }
end

.now ⇒ Object 



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# File 'lib/caltrain.rb', line 42

def now
  @now ||= Time.now.strftime('%H:%M:%S')
end

.pretty_abbrevs ⇒ Object 



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# File 'lib/caltrain.rb', line 82

def pretty_abbrevs
  max_field_width = abbrevs.values.map(&:size).max

  abbrevs.values.zip(abbrevs.keys).each do |name, abr|
    puts "%#{max_field_width}s #{abr}" % name
  end
end

.run!(args) ⇒ Object 



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# File 'lib/caltrain.rb', line 109

def run!(args)
  begin
    act, loc, dir = *args

    if dir =~ /^n/
      puts method(actions[act.to_sym]).call(loc.to_sym, :north)
    elsif dir =~ /^s/
      puts method(actions[act.to_sym]).call(loc.to_sym, :south)
    else
      raise
    end
  rescue
    usage
  end
end

.times(loc, dir) ⇒ Object 



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# File 'lib/caltrain.rb', line 14

def times(loc, dir)
  @times ||= times_for_location(loc).select { |line| trip_ids_for_direction(dir).include?(line[0]) }.map {|i| i[1]}.sort
end

.times_for_location(loc) ⇒ Object 



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# File 'lib/caltrain.rb', line 26

def times_for_location(loc)
  @times_for_location ||= all_times.select { |arr| arr[3] =~ /^#{abbrevs[loc]}/ }
end

.trip_ids_for_direction(dir) ⇒ Object 



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# File 'lib/caltrain.rb', line 18

def trip_ids_for_direction(dir)
  @trip_ids_for_direction ||= trips_for_time_of_week.select {|trip| trip[4] == (dir == :north ? '0' : '1') }.map(&:first)
end

.trips_for_time_of_week ⇒ Object 



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# File 'lib/caltrain.rb', line 22

def trips_for_time_of_week
  @trips_for_time_of_week ||= all_trips.select { |trip| trip[2] =~ (weekend? ? /^WE/ : /^WD/) }
end

.upcoming_departures(loc, dir) ⇒ Object 



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# File 'lib/caltrain.rb', line 6

def upcoming_departures(loc, dir)
  times(loc, dir).select { |time| time > now }.sort
end

.usage ⇒ Object 



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# File 'lib/caltrain.rb', line 90

def usage
  puts "Usage:"
  puts "  caltrain <action> <location> <direction>"
  puts "  action => [ next | list ]"
  puts ""
  puts "Abbreviations:"
  pretty_abbrevs
  exit(1)
end

.weekend? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/caltrain.rb', line 38

def weekend?
  @weekend ||= (Time.now.saturday? || Time.now.sunday?)
end