Class: JSONAPI::Request

Inherits:
Object
  • Object
show all
Includes:
ResourceFor
Defined in:
lib/jsonapi/request.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ResourceFor

included

Constructor Details

#initialize(params = nil, options = {}) ⇒ Request 



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# File 'lib/jsonapi/request.rb', line 10

def initialize(params = nil, options = {})
  @context = options.fetch(:context, nil)
  @key_formatter = options.fetch(:key_formatter, JSONAPI.configuration.key_formatter)
  @errors = []
  @operations = []
  @fields = {}
  @include = []
  @filters = {}

  setup(params) if params
end

Instance Attribute Details

#context ⇒ Object

Returns the value of attribute context.



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# File 'lib/jsonapi/request.rb', line 8

def context
  @context
end

#errors ⇒ Object

Returns the value of attribute errors.



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# File 'lib/jsonapi/request.rb', line 8

def errors
  @errors
end

#fields ⇒ Object

Returns the value of attribute fields.



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# File 'lib/jsonapi/request.rb', line 8

def fields
  @fields
end

#filters ⇒ Object

Returns the value of attribute filters.



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# File 'lib/jsonapi/request.rb', line 8

def filters
  @filters
end

#include ⇒ Object

Returns the value of attribute include.



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# File 'lib/jsonapi/request.rb', line 8

def include
  @include
end

#operations ⇒ Object

Returns the value of attribute operations.



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# File 'lib/jsonapi/request.rb', line 8

def operations
  @operations
end

#resource_klass ⇒ Object

Returns the value of attribute resource_klass.



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# File 'lib/jsonapi/request.rb', line 8

def resource_klass
  @resource_klass
end

Instance Method Details

#check_include(resource_klass, include_parts) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 101

def check_include(resource_klass, include_parts)
  association_name = unformat_key(include_parts.first)

  association = resource_klass._association(association_name)
  if association
    unless include_parts.last.empty?
      check_include(Resource.resource_for(association.class_name), include_parts.last.partition('.'))
    end
  else
    @errors.concat(JSONAPI::Exceptions::InvalidInclude.new(format_key(resource_klass._type),
                                                           include_parts.first, ).errors)
  end
end

#format_key(key) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 376

def format_key(key)
  @key_formatter.format(key)
end

#parse_add_association_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 222

def parse_add_association_operation(params)
  association_type = params[:association]

  parent_key = params[resource_klass._as_parent_key]

  association = resource_klass._association(association_type)

  if association.is_a?(JSONAPI::Association::HasOne)
    plural_association_type = association_type.pluralize

    if params[plural_association_type].nil?
      raise ActionController::ParameterMissing.new(plural_association_type)
    end

    object_params = {links: {association_type => params[plural_association_type]}}
    verified_param_set = parse_params(object_params, @resource_klass.updateable_fields(@context))

    @operations.push JSONAPI::CreateHasOneAssociationOperation.new(resource_klass,
                                                                  parent_key,
                                                                  association_type,
                                                                  verified_param_set[:has_one].values[0])
  else
    if params[association_type].nil?
      raise ActionController::ParameterMissing.new(association_type)
    end

    object_params = {links: {association_type => params[association_type]}}
    verified_param_set = parse_params(object_params, @resource_klass.updateable_fields(@context))

    @operations.push JSONAPI::CreateHasManyAssociationOperation.new(resource_klass,
                                                                    parent_key,
                                                                    association_type,
                                                                    verified_param_set[:has_many].values[0])
  end
rescue ActionController::ParameterMissing => e
  @errors.concat(JSONAPI::Exceptions::ParameterMissing.new(e.param).errors)
end

#parse_add_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 147

def parse_add_operation(params)
  object_params_raw = params.require(format_key(@resource_klass._type))

  if object_params_raw.is_a?(Array)
    object_params_raw.each do |p|
      @operations.push JSONAPI::CreateResourceOperation.new(@resource_klass,
                                                            parse_params(p, @resource_klass.createable_fields(@context)))
    end
  else
    @operations.push JSONAPI::CreateResourceOperation.new(@resource_klass,
                                                          parse_params(object_params_raw, @resource_klass.createable_fields(@context)))
  end
rescue ActionController::ParameterMissing => e
  @errors.concat(JSONAPI::Exceptions::ParameterMissing.new(e.param).errors)
rescue JSONAPI::Exceptions::Error => e
  @errors.concat(e.errors)
end

#parse_fields(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 55

def parse_fields(params)
  fields = {}

  # Extract the fields for each type from the fields parameters
  unless params[:fields].nil?
    if params[:fields].is_a?(String)
      value = params[:fields]
      resource_fields = value.split(',') unless value.nil? || value.empty?
      type = @resource_klass._type
      fields[type] = resource_fields
    elsif params[:fields].is_a?(ActionController::Parameters)
      params[:fields].each do |param, value|
        resource_fields = value.split(',') unless value.nil? || value.empty?
        type = param
        fields[type] = resource_fields
      end
    end
  end

  # Validate the fields
  fields.each do |type, values|
    underscored_type = unformat_key(type)
    fields[type] = []
    type_resource = self.class.resource_for(underscored_type)
    if type_resource.nil? || !(@resource_klass._type == underscored_type ||
                               @resource_klass._has_association?(underscored_type))
      @errors.concat(JSONAPI::Exceptions::InvalidResource.new(type).errors)
    else
      unless values.nil?
        valid_fields = type_resource.fields.collect {|key| format_key(key)}
        values.each do |field|
          if valid_fields.include?(field)
            fields[type].push unformat_key(field)
          else
            @errors.concat(JSONAPI::Exceptions::InvalidField.new(type, field).errors)
          end
        end
      else
        @errors.concat(JSONAPI::Exceptions::InvalidField.new(type, 'nil').errors)
      end
    end
  end

  @fields = fields.deep_transform_keys{ |key| unformat_key(key) }
end

#parse_filters(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 125

def parse_filters(params)
  # Coerce :ids -> :id
  if params[:ids]
    params[:id] = params[:ids]
    params.delete(:ids)
  end

  filters = {}
  params.each do |key, value|
    filter = key.to_sym

    if [:include, :fields, :format, :controller, :action, :sort].include?(filter)
      # Ignore non-filter parameters
    elsif @resource_klass._allowed_filter?(filter)
      filters[filter] = value
    else
      @errors.concat(JSONAPI::Exceptions::FilterNotAllowed.new(filter).errors)
    end
  end
  @filters = filters
end

#parse_include(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 115

def parse_include(params)
  included_resources_raw = CSV.parse_line(params[:include]) unless params[:include].nil? || params[:include].empty?
  @include = []
  return if included_resources_raw.nil?
  included_resources_raw.each do |include|
    check_include(@resource_klass, include.partition('.'))
    @include.push(unformat_key(include).to_s)
  end
end

#parse_key_array(raw) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 368

def parse_key_array(raw)
  keys = []
  raw.split(/,/).collect do |key|
    keys.push @resource_klass.verify_key(key, @context)
  end
  return keys
end

#parse_params(params, allowed_fields) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 165

def parse_params(params, allowed_fields)
  # push links into top level param list with attributes in order to check for invalid params
  if params[:links]
    params[:links].each do |link, value|
      params[link] = value
    end
    params.delete(:links)
  end
  verify_permitted_params(params, allowed_fields)

  checked_attributes = {}
  checked_has_one_associations = {}
  checked_has_many_associations = {}

  params.each do |key, value|
    param = unformat_key(key)

    association = @resource_klass._association(param)

    if association.is_a?(JSONAPI::Association::HasOne)
      checked_has_one_associations[param] = @resource_klass.resource_for(association.type).verify_key(value, @context)
    elsif association.is_a?(JSONAPI::Association::HasMany)
      keys = []
      if value.is_a?(Array)
        value.each do |val|
          keys.push(@resource_klass.resource_for(association.type).verify_key(val, @context))
        end
      else
        keys.push(@resource_klass.resource_for(association.type).verify_key(value, @context))
      end
      checked_has_many_associations[param] = keys
    else
      checked_attributes[param] = unformat_value(param, value)
    end
  end

  return {
    'attributes' => checked_attributes,
    'has_one' => checked_has_one_associations,
    'has_many' => checked_has_many_associations
  }.deep_transform_keys{ |key| unformat_key(key) }
end

#parse_remove_association_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 347

def parse_remove_association_operation(params)
  association_type = params[:association]

  parent_key = params[resource_klass._as_parent_key]

  association = resource_klass._association(association_type)
  if association.is_a?(JSONAPI::Association::HasMany)
    keys = parse_key_array(params[:keys])
    keys.each do |key|
      @operations.push JSONAPI::RemoveHasManyAssociationOperation.new(resource_klass,
                                                                        parent_key,
                                                                        association_type,
                                                                        key)
    end
  else
    @operations.push JSONAPI::RemoveHasOneAssociationOperation.new(resource_klass,
                                                                     parent_key,
                                                                     association_type)
  end
end

#parse_remove_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 335

def parse_remove_operation(params)
  keys = parse_key_array(params.permit(@resource_klass._key)[@resource_klass._key])

  keys.each do |key|
    @operations.push JSONAPI::RemoveResourceOperation.new(@resource_klass, key)
  end
rescue ActionController::UnpermittedParameters => e
  @errors.concat(JSONAPI::Exceptions::ParametersNotAllowed.new(e.params).errors)
rescue JSONAPI::Exceptions::Error => e
  @errors.concat(e.errors)
end

#parse_replace_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 298

def parse_replace_operation(params)
  object_params_raw = params.require(format_key(@resource_klass._type))

  keys = params[@resource_klass._key]
  if object_params_raw.is_a?(Array)
    if keys.count != object_params_raw.count
      raise JSONAPI::Exceptions::CountMismatch
    end

    object_params_raw.each do |object_params|
      if object_params[@resource_klass._key].nil?
        raise JSONAPI::Exceptions::MissingKey.new
      end

      if !keys.include?(object_params[@resource_klass._key])
        raise JSONAPI::Exceptions::KeyNotIncludedInURL.new(object_params[@resource_klass._key])
      end
      @operations.push JSONAPI::ReplaceFieldsOperation.new(@resource_klass,
                                                           object_params[@resource_klass._key],
                                                           parse_params(object_params, @resource_klass.updateable_fields(@context)))
    end
  else
    if !object_params_raw[@resource_klass._key].nil? && keys != object_params_raw[@resource_klass._key]
      raise JSONAPI::Exceptions::KeyNotIncludedInURL.new(object_params_raw[@resource_klass._key])
    end

    @operations.push JSONAPI::ReplaceFieldsOperation.new(@resource_klass,
                                                           params[@resource_klass._key],
                                                           parse_params(object_params_raw, @resource_klass.updateable_fields(@context)))
  end

rescue ActionController::ParameterMissing => e
  @errors.concat(JSONAPI::Exceptions::ParameterMissing.new(e.param).errors)
rescue JSONAPI::Exceptions::Error => e
  @errors.concat(e.errors)
end

#parse_update_association_operation(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 260

def parse_update_association_operation(params)
  association_type = params[:association]

  parent_key = params[resource_klass._as_parent_key]

  association = resource_klass._association(association_type)

  if association.is_a?(JSONAPI::Association::HasOne)
    plural_association_type = association_type.pluralize

    if params[plural_association_type].nil?
      raise ActionController::ParameterMissing.new(plural_association_type)
    end

    object_params = {links: {association_type => params[plural_association_type]}}
    verified_param_set = parse_params(object_params, @resource_klass.updateable_fields(@context))

    @operations.push JSONAPI::ReplaceHasOneAssociationOperation.new(resource_klass,
                                                                    parent_key,
                                                                    association_type,
                                                                    verified_param_set[:has_one].values[0])
  else
    if params[association_type].nil?
      raise ActionController::ParameterMissing.new(association_type)
    end

    object_params = {links: {association_type => params[association_type]}}
    verified_param_set = parse_params(object_params, @resource_klass.updateable_fields(@context))

    @operations.push JSONAPI::ReplaceHasManyAssociationOperation.new(resource_klass,
                                                                     parent_key,
                                                                     association_type,
                                                                     verified_param_set[:has_many].values[0])
  end
rescue ActionController::ParameterMissing => e
  @errors.concat(JSONAPI::Exceptions::ParameterMissing.new(e.param).errors)
end

#setup(params) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 22

def setup(params)
  @resource_klass ||= self.class.resource_for(params[:controller]) if params[:controller]

  unless params.nil?
    case params[:action]
      when 'index'
        parse_fields(params)
        parse_include(params)
        parse_filters(params)
      when 'show_associations'
      when 'show'
        parse_fields(params)
        parse_include(params)
      when 'create'
        parse_fields(params)
        parse_include(params)
        parse_add_operation(params)
      when 'create_association'
        parse_add_association_operation(params)
      when 'update_association'
        parse_update_association_operation(params)
      when 'update'
        parse_fields(params)
        parse_include(params)
        parse_replace_operation(params)
      when 'destroy'
        parse_remove_operation(params)
      when 'destroy_association'
        parse_remove_association_operation(params)
    end
  end
end

#unformat_key(key) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 380

def unformat_key(key)
  @key_formatter.unformat(key)
end

#unformat_value(attribute, value) ⇒ Object 



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# File 'lib/jsonapi/request.rb', line 208

def unformat_value(attribute, value)
  value_formatter = JSONAPI::ValueFormatter.value_formatter_for(@resource_klass._attribute_options(attribute)[:format])
  value_formatter.unformat(value, @context)
end

#verify_permitted_params(params, allowed_fields) ⇒ Object

Raises:



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# File 'lib/jsonapi/request.rb', line 213

def verify_permitted_params(params, allowed_fields)
  formatted_allowed_fields = allowed_fields.collect {|field| format_key(field).to_sym}
  params_not_allowed = []
  params.keys.each do |key|
    params_not_allowed.push(key) unless formatted_allowed_fields.include?(key.to_sym)
  end
  raise JSONAPI::Exceptions::ParametersNotAllowed.new(params_not_allowed) if params_not_allowed.length > 0
end