Class: Hungry::Resource

Inherits:
Object
  • Object
show all
Extended by:
Enumerable
Includes:
HTTParty
Defined in:
lib/hungry/resource.rb

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(new_attributes = {}) ⇒ Resource

INSTANCE METHODS:



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# File 'lib/hungry/resource.rb', line 141

def initialize(new_attributes = {})
  self.attributes = {}

  new_attributes.each do |key, value|
    if value.respond_to?(:symbolize_keys)
      value = value.symbolize_keys
    end

    attributes[key] = value

    if respond_to?("#{key}=")
      send("#{key}=", value)
    end
  end
end

Class Attribute Details

.default_criteria ⇒ Object 



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# File 'lib/hungry/resource.rb', line 98

def default_criteria
  if @default_criteria.respond_to?(:call)
    @default_criteria.call
  else
    @default_criteria || {}
  end
end

.endpoint ⇒ Object 



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# File 'lib/hungry/resource.rb', line 94

def endpoint
  @endpoint || (superclass.respond_to?(:endpoint) ? superclass.endpoint : nil)
end

Instance Attribute Details

#attributes ⇒ Object

Returns the value of attribute attributes.



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# File 'lib/hungry/resource.rb', line 7

def attributes
  @attributes
end

#data_source ⇒ Object

Returns the value of attribute data_source.



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# File 'lib/hungry/resource.rb', line 7

def data_source
  @data_source
end

#resources ⇒ Object

Returns the value of attribute resources.



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# File 'lib/hungry/resource.rb', line 7

def resources
  @resources
end

Class Method Details

.all(criteria = {}) ⇒ Object 



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# File 'lib/hungry/resource.rb', line 130

def all(criteria = {})
  collection.all(criteria)
end

.belongs_to(association, klass = 'Resource') ⇒ Object 



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# File 'lib/hungry/resource.rb', line 17

def self.belongs_to(association, klass = 'Resource')
  define_method association do
    @belongs_to ||= {}
    @belongs_to[association] ||= begin
      klass = Kernel.const_get(klass) if klass.is_a?(String)

      if attributes[association].present?
        resource = klass.new attributes[association]
        resource.data_source = data_source
        resource
      elsif url = resources[association]
        attributes = self.class.get url
        resource = klass.new attributes
        resource.data_source = url
        resource
      end
    end
  end

  define_method "#{association}=" do |object_or_attributes|
    @belongs_to ||= {}

    klass = Kernel.const_get(klass) if klass.is_a?(String)

    if object_or_attributes.is_a?(klass)
      @belongs_to[association] = object_or_attributes
    elsif object_or_attributes.present?
      self.attributes.merge!(association => object_or_attributes)
    else
      @belongs_to[association] = nil
    end

    @belongs_to[association]
  end
end

.collection ⇒ Object 



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# File 'lib/hungry/resource.rb', line 106

def collection
  Collection.new(self, endpoint, default_criteria)
end

.each(&block) ⇒ Object 



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# File 'lib/hungry/resource.rb', line 134

def each(&block)
  all.each(&block)
end

.find(id) ⇒ Object

Raises:

  • (NoEndpointSpecified) 


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# File 'lib/hungry/resource.rb', line 110

def find(id)
  raise NoEndpointSpecified unless endpoint

  uri = "#{endpoint}/#{id}"

  Util.log "GET: #{uri}"
  response = get uri

  if response.code == 200
    attributes = Util.parse_json(response.body)
    resource = new(attributes)
    resource.data_source = uri
    resource
  end
end

.first(n = 1) ⇒ Object 



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# File 'lib/hungry/resource.rb', line 126

def first(n = 1)
  collection.first(n)
end

.get(*args) ⇒ Object

CLASS METHODS:



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# File 'lib/hungry/resource.rb', line 11

def self.get(*args)
  self.base_uri Hungry.api_url

  super
end

.has_many(association, klass = 'Resource') ⇒ Object 



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# File 'lib/hungry/resource.rb', line 53

def self.has_many(association, klass = 'Resource')
  define_method association do
    @has_many ||= {}
    @has_many[association] ||= begin
      klass = Kernel.const_get(klass) if klass.is_a?(String)

      if url = resources[association]
        collection = klass.collection.from_url(url)

        if attributes[association].present?
          collection.results = attributes[resource]
        end

        collection
      end
    end
  end
end

.lazy_load(*attributes) ⇒ Object 



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# File 'lib/hungry/resource.rb', line 72

def self.lazy_load(*attributes)
  attributes.each do |attribute|
    alias_method "#{attribute}_without_lazy_load".to_sym, attribute
    define_method attribute do
      result = send "#{attribute}_without_lazy_load".to_sym

      if !result.present? && (canonical_data_source != data_source && canonical_data_source.present?)
        reload
        send "#{attribute}_without_lazy_load".to_sym
      else
        result
      end
    end
  end
end

Instance Method Details

#canonical_data_source ⇒ Object 



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# File 'lib/hungry/resource.rb', line 157

def canonical_data_source
  resources && resources[:self]
end

#reload ⇒ Object 



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# File 'lib/hungry/resource.rb', line 161

def reload
  resource = self.class.find id

  if resource
    self.data_source = resource.data_source
    initialize resource.attributes
  else
    self.data_source = nil
    initialize Hash[attributes.keys.map { |key| [key, nil] }]
  end

  @has_many   = {}
  @belongs_to = {}

  self
end