Class: GeoClue::Cache

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

Constant Summary collapse

EXPIRATION = 
900

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/geoclue/cache.rb', line 9

def initialize
  @data = {}
  read if valid?
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/geoclue/cache.rb', line 5

def data
  @data
end

Instance Method Details

#address ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 31

def address
  @data.slice(*Client::ADDR_KEYS)
end

#coordinates ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 27

def coordinates
  @data.slice(*Client::COORD_KEYS)
end

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 47

def exists?
  File.exist?(filepath)
end

#filepath ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 59

def filepath
  File.expand_path(
    File.join(
      ENV.fetch('XDG_CACHE_HOME',
                File.join(ENV.fetch('HOME', '~/'),'.cache')),
      'geoclue-cache.json'
    )
  )
end

#full? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 55

def full?
  File.stat(filepath).size > 0
end

#has_address? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 39

def has_address?
  valid? and Client::ADDR_KEYS.all? { |key| @data.key?(key) }
end

#has_coordinates? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 35

def has_coordinates?
  valid? and Client::COORD_KEYS.all? { |key| @data.key?(key) }
end

#read ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 14

def read
  @data = JSON.parse(File.read(filepath))
end

#recent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 51

def recent?
  (Time.now - File.mtime(filepath)) < EXPIRATION
end

#save(data) ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 18

def save(data)
  @data.merge!(data)
  write!
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geoclue/cache.rb', line 43

def valid?
  exists? and recent? and full?
end

#write! ⇒ Object 



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# File 'lib/geoclue/cache.rb', line 23

def write!
  File.write(filepath, JSON.dump(@data))
end