Module: Kojac::ControllerOpMethods

Defined in:
lib/kojac/kojac_rails.rb

Class Method Summary collapse

Class Method Details

.add_op ⇒ Object

def execute_op puts ‘execute_op’ end



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# File 'lib/kojac/kojac_rails.rb', line 364

def add_op
	ring = current_user.try(:ring)
	op = params[:op]
	model = deduce_model_class
	raise "ADD only supports associated collections at present eg order.items" unless op[:key].index('.')

	item = KojacUtils.model_for_key(op[:key].base_key)
	assoc = (assoc=op[:key].key_assoc) && assoc.to_sym
	id = op[:value]['id']

	ma = item.class.reflect_on_association(assoc)
	case ma.macro
		when :has_many
			assoc_class = ma.klass
			assoc_item = assoc_class.find(id)
			item.send(assoc) << assoc_item

			#ids_method = assoc.to_s.singularize+'_ids'
			#ids = item.send(ids_method.to_sym)
			#item.send((ids_method+'=').to_sym,ids + [id])
			result_key = assoc_item.kojac_key
			merge_model_into_results(assoc_item)
		else
			raise "ADD does not yet support #{ma.macro} associations"
	end
	{
		key: op[:key],
	  verb: op[:verb],
	  result_key: result_key,
	  results: results
	}
end

.create_on_association(aItem, aAssoc, aValues, aRing) ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 128

def create_on_association(aItem,aAssoc,aValues,aRing)
	raise "User does not have permission for create on #{aAssoc}" unless aItem.class.permitted_associations(:create,aRing).include?(aAssoc.to_sym)

	return nil unless ma = aItem.class.reflect_on_association(aAssoc.to_sym)
	a_model_class = ma.klass

	aValues = KojacUtils.upgrade_hashes_to_params(aValues || {})

	case ma.macro
		when :belongs_to
			return nil if !aValues.is_a?(Hash)
			fields = aValues.permit( *a_model_class.permitted_fields(:write,aRing) )
			return aItem.send("build_#{aAssoc}".to_sym,fields)
		when :has_many
			aValues = [aValues] if aValues.is_a?(Hash)
			return nil unless aValues.is_a? Array
			aValues.each do |v|
				fields = v.permit( *a_model_class.permitted_fields(:write,aRing) )
				new_sub_item = nil
				case ma.macro
					when :has_many
						new_sub_item = aItem.send(aAssoc.to_sym).create(fields)
					else
						raise "#{ma.macro} association unsupported in CREATE"
				end
				merge_model_into_results(new_sub_item)
			end
	end
	#
	#
	#
	#a_value = op[:value][a]        # get data for this association, assume {}
	#if a_value.is_a?(Hash)
	#	a_model_class = ma.klass
	#	fields = a_value.permit( *permitted_fields(:write,a_model_class) )
	#	item.send("build_#{a}".to_sym,fields)
	#	included_assocs << a.to_sym
	#elsif a_value.is_a?(Array)
	#	raise "association collections not yet implemented for create"
	#else
	#	next
	#end
end

.create_op ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 172

def create_op
	ring = current_user.try(:ring)
	op = params[:op]
	options = op[:options] || {}
	model_class = deduce_model_class
	resource,id,assoc = op['key'].split_kojac_key
	if assoc  # create operation on an association eg. {verb: "CREATE", key: "order.items"}
		raise "User does not have permission for #{op[:verb]} operation on #{model_class.to_s}.#{assoc}" unless model_class.permitted_associations(:create,ring).include?(assoc.to_sym)
		item = KojacUtils.model_for_key(key_join(resource,id))
		ma = model_class.reflect_on_association(assoc.to_sym)
		a_value = op[:value]        # get data for this association, assume {}
		raise "create multiple not yet implemented for associations" unless a_value.is_a?(Hash)

		a_model_class = ma.klass
		p_fields = a_model_class.permitted_fields(:write,ring)
		fields = a_value.permit( *p_fields )
		new_sub_item = nil
		case ma.macro
			when :has_many
				new_sub_item = item.send(assoc.to_sym).create(fields)
			else
				raise "#{ma.macro} association unsupported in CREATE"
		end
		result_key = op[:result_key] || new_sub_item.kojac_key
		merge_model_into_results(new_sub_item)
	else    # create operation on a resource eg. {verb: "CREATE", key: "order_items"} but may have embedded association values
		p_fields = model_class.permitted_fields(:write,ring)
		raise "User does not have permission for #{op[:verb]} operation on #{model_class.to_s}" unless model_class.ring_can?(:create,ring)

		p_fields = op[:value].permit( *p_fields )
		item = model_class.create!(p_fields)

		options_include = options['include'] || []
		included_assocs = []
		p_assocs = model_class.permitted_associations(:write,ring)
		if p_assocs
			p_assocs.each do |a|
				next unless (a_value = op[:value][a]) || options_include.include?(a.to_s)
				create_on_association(item,a,a_value,ring)
				included_assocs << a.to_sym
			end
		end
		item.save!
		result_key = op[:result_key] || item.kojac_key
		merge_model_into_results(item,result_key,:include => included_assocs)
	end
	{
		key: op[:key],
	  verb: op[:verb],
	  result_key: result_key,
	  results: results
	}
end

.deduce_model_class ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 120

def deduce_model_class
	KojacUtils.model_class_for_key(self.kojac_resource)
end

.destroy_op ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 345

def destroy_op
	ring = current_user.try(:ring)
	op = params[:op]
	result_key = op[:result_key] || op[:key]
	item = KojacUtils.model_for_key(op[:key])
	item.destroy if item
	results[result_key] = nil
	{
		key: op[:key],
	  verb: op[:verb],
	  result_key: result_key,
	  results: results
	}
end

.included(aClass) ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 101

def self.included(aClass)
  #aClass.send :extend, ClassMethods
  aClass.send :include, ActiveSupport::Callbacks
  aClass.send :define_callbacks, :update_op, :scope => [:kind, :name]
end

.kojac_resource ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 124

def kojac_resource
	self.class.to_s.chomp('Controller').snake_case
end

.read_op ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 263

def read_op
	op = params[:op]
	key = op[:key]
	result_key = nil
	resource,id = key.split '__'
	model = deduce_model_class

	if id   # item
		if model
			item = model.by_key(key,op)
			result_key = op[:result_key] || (item && item.kojac_key) || op[:key]
			merge_model_into_results(item,result_key,op[:options])
		else
			result_key = op[:result_key] || op[:key]
			results[result_key] = null
		end
	else    # collection
		result_key = op[:result_key] || op[:key]
		results[result_key] = []
		if model
			items = model.by_key(key,op)
			items.each do |m|
				item_key = m.kojac_key
				results[result_key] << item_key.bite(resource+'__')
				merge_model_into_results(m,item_key,op[:options])
			end
		end
	end
	{
		key: op[:key],
	  verb: op[:verb],
	  results: results,
	  result_key: result_key
	}
end

.remove_op ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 397

def remove_op
	ring = current_user.try(:ring)
	op = params[:op]
	model = deduce_model_class
	raise "REMOVE only supports associated collections at present eg order.items" unless op[:key].key_assoc

	item = KojacUtils.model_for_key(op[:key].base_key)
	assoc = (assoc=op[:key].key_assoc) && assoc.to_sym
	id = op[:value]['id']

	ma = item.class.reflect_on_association(assoc)
	case ma.macro
		when :has_many
			assoc_class = ma.klass
			if assoc_item = item.send(assoc).find(id)
				item.send(assoc).delete(assoc_item)
				result_key = assoc_item.kojac_key
				if (assoc_item.destroyed?)
					results[result_key] = nil
				else
					merge_model_into_results(assoc_item,result_key)
				end
			end
		else
			raise "REMOVE does not yet support #{ma.macro} associations"
	end
	{
		key: op[:key],
	  verb: op[:verb],
	  result_key: result_key,
	  results: results
	}
end

.results ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 116

def results
	@results ||= {}
end

.update_op ⇒ Object 



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# File 'lib/kojac/kojac_rails.rb', line 299

def update_op
	result = nil
	model = deduce_model_class

	ring = current_user.try(:ring)
	op = params[:op]
	result_key = nil
	if self.item = model.by_key(op[:key],op)

		run_callbacks :update_op do
			item.update_permitted_attributes!(op[:value], ring)

			associations = model.permitted_associations(:write,ring)
			associations.each do |k|
				next unless assoc = model.reflect_on_association(k)
				next unless op[:value][k]
				case assoc.macro
					when :belongs_to
						if leaf = (item.send(k) || item.send("build_#{k}".to_sym))
							#permitted_fields = leaf.class.permitted_fields(:write,ring)
							#permitted_fields = op[:value][k].permit( *permitted_fields )
							#leaf.assign_attributes(permitted_fields, :without_protection => true)
							#leaf.save!
							leaf.update_permitted_attributes!(op[:value][k], ring)
						end
				end
			end

			result_key = item.kojac_key
			results[result_key] = item

			associations.each do |a|
				next unless assoc_item = item.send(a)
				next unless key = assoc_item.respond_to?(:kojac_key) && assoc_item.kojac_key
				results[key] = assoc_item
			end
		end
	end
	{
		key: op[:key],
	  verb: op[:verb],
	  result_key: result_key,
	  results: results
	}
end