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