Class: Quiver::Serialization::JsonApi::ItemTypeHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/quiver/serialization/json_api/item_type_handler.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type, config_block, no_id = false) ⇒ ItemTypeHandler

Returns a new instance of ItemTypeHandler.

Raises:



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 8

def initialize(type, config_block, no_id=false)

  self.attributes_storage = {}
  self.links = {}
  self.type = type

  instance_exec(&config_block)

  raise NoIdError, "no :id in handler for type #{type}" unless no_id || attributes_storage[:id]
end

Instance Attribute Details

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 6

def type
  @type
end

Instance Method Details

#attribute(name, opts = {}) ⇒ Object 



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 23

def attribute(name, opts={})
  attributes_storage[name] = opts
end

#attributes(*names) ⇒ Object 



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 27

def attributes(*names)
  names.each do |name|
    attribute(name)
  end
end

#calculated_attribute(name, &block) ⇒ Object 



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 33

def calculated_attribute(name, &block)
  attributes_storage[name] = {
    proc: block
  }
end

#link(name, opts = {}) ⇒ Object 



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 19

def link(name, opts={})
  links[name] = opts
end

#serialize(item, opts = {}) ⇒ Object 



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# File 'lib/quiver/serialization/json_api/item_type_handler.rb', line 39

def serialize(item, opts={})
  context = opts[:context]

  serialized_links = links.each_with_object({}) do |(name, opts), h|
    h[name] = {}

    if href_proc = opts[:resource]
      h[name][:resource] = context.instance_exec(item, &href_proc)
    end

    if self_proc = opts[:self]
      h[name][:self] = context.instance_exec(item, &self_proc)
    end

    if value_proc = opts[:value]
      value = value_from_proc(value_proc, item)
      key = value.is_a?(Array) ? :ids : :id

      h[name][key] = value
    end

    if type = opts[:type]
      h[name][:type] = type
    end

    h[name].merge!(scope: context.instance_exec(item, &opts[:scope])) if opts[:scope]
  end

  serialized_attributes = attributes_storage.each_with_object({}) do |(name, opts), h|
    if proc = opts[:proc]
      h[name] = context.instance_exec(item, &proc)
    elsif attr_alias = opts[:alias]
      h[name] = item.send(attr_alias)
    else
      h[name] = item.send(name)
    end
  end

  if serialized_links.count > 0
    serialized_attributes.merge(links: serialized_links)
  else
    serialized_attributes
  end
end