Class: Batt::Reader

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Reader

Returns a new instance of Reader.



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# File 'lib/batt/reader.rb', line 6

def initialize
  os = get_os
  case os
  when :darwin
    @battery_reader = lambda { parse_battery_status_osx(get_battery_status_osx) }
  else
    raise "Unsupported OS: #{ os }"
  end
end

Instance Attribute Details

#battery_reader ⇒ Object

Returns the value of attribute battery_reader.



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# File 'lib/batt/reader.rb', line 4

def battery_reader
  @battery_reader
end

Class Method Details

.color_for_capacity(capacity) ⇒ Object

Given a capacity percentage, return the color



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# File 'lib/batt/reader.rb', line 54

def color_for_capacity(capacity)
  case capacity.to_i
  when -100..20 then :red # if there's any weird errors where things go negative, be red.
  when 20..30 then :orange
  when 30..75 then :yellow
  else
    :green
  end
end

Instance Method Details

#get_battery_status_osx ⇒ Object

get the battery status for OSX returns a hash. spits out something like: Currently drawing from ‘AC Power’ -InternalBattery-0 98%; charging; 0:30 remaining TODO: write some docs



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# File 'lib/batt/reader.rb', line 38

def get_battery_status_osx
  line = Cocaine::CommandLine.new('pmset', '-g batt')
  output = line.run
end

#get_os ⇒ Object

figure out which OS is running this might need to be a little more solid returns a downcased symbol (eg: :darwin or :linux)



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# File 'lib/batt/reader.rb', line 25

def get_os
  line = Cocaine::CommandLine.new('uname')
  output = line.run

  output.chomp.downcase.intern
end

#parse_battery_status_osx(output) ⇒ Object 



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# File 'lib/batt/reader.rb', line 43

def parse_battery_status_osx(output)
  output = output.split(/\n/)
  status = output.shift.scan(/'(.+?)'/).first
  result = status + output.shift.scan(/(\d+%);\s*(.+?);\s*(.+)/).first

  Hash[[:source, :capacity, :status, :remaining].zip(result)]
end

#status ⇒ Object

runs the batteryreader this could probably be refactored to leverage a class per OS



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# File 'lib/batt/reader.rb', line 18

def status
  @battery_reader.call
end