Class: Mumukit::Platform::Model

Inherits:
Object
  • Object
show all
Includes:
ActiveModel::Model
Defined in:
lib/mumukit/platform/model.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.accessors ⇒ Object 



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# File 'lib/mumukit/platform/model.rb', line 39

def self.accessors
  self.readers + self.attributes.map { |it| "#{it}=".to_sym }
end

.define_attr_readers(readers, bool_readers) ⇒ Object

Define the attribute readers for the model, given the normal accessor names and the boolean accessor names



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# File 'lib/mumukit/platform/model.rb', line 45

def self.define_attr_readers(readers, bool_readers)
  attr_reader(*readers)
  bool_readers.each { |it| define_method("#{it}?") { !!send(it) } }
end

.define_attr_writers(writers, bool_writers) ⇒ Object

Define the attribute writers for the model, given the normal accessor names and the boolean accessor names



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# File 'lib/mumukit/platform/model.rb', line 52

def self.define_attr_writers(writers, bool_writers)
  attr_writer(*writers)
  bool_writers.each { |it| define_method("#{it}=") { |value| instance_variable_set("@#{it}", value.to_boolean) } }
end

.dump(obj) ⇒ Object

Serializes model



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# File 'lib/mumukit/platform/model.rb', line 60

def self.dump(obj)
  obj.to_json
end

.load(json) ⇒ Object

Deserializes model



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# File 'lib/mumukit/platform/model.rb', line 65

def self.load(json)
  json ? new(JSON.parse(json)) : new
end

.model_attr_accessor(*readers) ⇒ Object

Accessors



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# File 'lib/mumukit/platform/model.rb', line 17

def self.model_attr_accessor(*readers)
  bools, raws = readers.partition { |it| it.to_s.end_with? '?' }
  raw_bools = bools.map { |it| it.to_s[0..-2].to_sym }
  attributes = raws + raw_bools

  self.readers += readers
  self.attributes += raws + raw_bools

  define_attr_readers attributes, raw_bools
  define_attr_writers raws, raw_bools
end

.parse(hash) ⇒ Object

Parses model from an event. Only allowed attributes are accepted



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# File 'lib/mumukit/platform/model.rb', line 31

def self.parse(hash)
  hash ? new(hash.slice(*self.attributes)) : new
end

Instance Method Details

#as_json(options = {}) ⇒ Object 



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# File 'lib/mumukit/platform/model.rb', line 35

def as_json(options = {})
  super(options).slice(*self.class.attributes.map(&:to_s))
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mumukit/platform/model.rb', line 11

def empty?
  as_json.empty?
end