Class: Dry::Effects::Providers::Reader

Inherits:
Object
  • Object
show all
Defined in:
lib/dry/effects/providers/reader.rb

Constant Summary collapse

Any = 
::Object.new.tap { |any|
  def any.===(_)
    true
  end
}.freeze

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/dry/effects/providers/reader.rb', line 25

def initialize(*, **)
  super

  @state = Undefined
end

Instance Attribute Details

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/dry/effects/providers/reader.rb', line 19

def state
  @state
end

Class Method Details

.handle_method(scope, as: Undefined) ⇒ Object 



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# File 'lib/dry/effects/providers/reader.rb', line 7

def self.handle_method(scope, as: Undefined, **)
  Undefined.default(as) { :"with_#{scope}" }
end

Instance Method Details

#call(state) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Yield the block with the handler installed



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# File 'lib/dry/effects/providers/reader.rb', line 38

def call(state)
  case state
  when state_type
    @state = state
    yield
  else
    raise Errors::InvalidValueError.new(state, scope)
  end
end

#provide?(effect) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dry/effects/providers/reader.rb', line 60

def provide?(effect)
  effect.type.equal?(:state) && effect.name.equal?(:read) && scope.equal?(effect.scope)
end

#read ⇒ Object 



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# File 'lib/dry/effects/providers/reader.rb', line 31

def read
  state
end

#represent ⇒ String

Returns:

  • (String) 


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# File 'lib/dry/effects/providers/reader.rb', line 50

def represent
  if Undefined.equal?(state)
    "#{type}[#{scope} not set]"
  else
    "#{type}[#{scope} set]"
  end
end