Class: TokenDie

Inherits:
Object
  • Object
show all
Defined in:
lib/token-die.rb,
lib/token-die/version.rb

Constant Summary collapse

TIMESTAMP_KEY = 
'___timestamp____'.freeze
VERSION = 
'0.0.3'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(secret, ttl = 300, encryptor = Parsel::JSON) ⇒ TokenDie

Returns a new instance of TokenDie.



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# File 'lib/token-die.rb', line 16

def initialize(secret, ttl = 300, encryptor = Parsel::JSON)
  @secret = secret
  @ttl = ttl
  @encryptor = encryptor
end

Instance Attribute Details

#encryptor ⇒ Object (readonly)

Set the encryptor strategy. Defaults Parsel::JSON



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# File 'lib/token-die.rb', line 14

def encryptor
  @encryptor
end

#secret ⇒ Object (readonly)

Set the encryption secret



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# File 'lib/token-die.rb', line 6

def secret
  @secret
end

#ttl ⇒ Object (readonly)

Set the token TTL Defaults 300 (5 minutes)



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# File 'lib/token-die.rb', line 10

def ttl
  @ttl
end

Instance Method Details

#expired?(timestamp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/token-die.rb', line 46

def expired?(timestamp)
  timestamp.to_i < (self.timestamp - ttl)
end

#fresh?(timestamp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/token-die.rb', line 50

def fresh?(timestamp)
  !expired?(timestamp)
end

#generate(data = {}) ⇒ Object 



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# File 'lib/token-die.rb', line 26

def generate(data = {})
  timestamp = self.timestamp
  data.merge!(TIMESTAMP_KEY => timestamp)

  encryptor.encrypt(secret, data)
end

#recover(token) ⇒ Object 



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# File 'lib/token-die.rb', line 33

def recover(token)
  data = encryptor.decrypt(secret, token)
  return unless data
  return unless fresh?(data[TIMESTAMP_KEY])

  data.delete(TIMESTAMP_KEY)
  data
end

#timestamp ⇒ Object 



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# File 'lib/token-die.rb', line 22

def timestamp
  Time.now.utc.to_i
end

#valid?(token) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/token-die.rb', line 42

def valid?(token)
  !recover(token).nil?
end