Class: Menilite::Model

Inherits:
Object
  • Object
show all
Extended by:
Helper
Includes:
Helper
Defined in:
lib/menilite/model.rb

Defined Under Namespace

Classes: ActionInfo, FieldInfo, PresenceValidator, UniqueValidator, Validator, Validators

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Helper

client?, if_client, if_server, server?

Constructor Details

#initialize(fields = {}) ⇒ Model

Returns a new instance of Model.



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# File 'lib/menilite/model.rb', line 32

def initialize(fields = {})
  self.class.init

  if server?
    fields = fields.map{|k,v| [k.to_sym, v] }.to_h
  end

  @guid = fields.delete(:id) || SecureRandom.uuid

  self.class.field_info.select{|_, i| i.type == :reference}.each do |name, info|
    fields[:"#{name}_id"] = fields[info.name] if fields.has_key?(info.name)
  end

  fields.each{|k, v| type_validate(k, v) }
  fields = fields.map{|k,v| [k, convert_value(self.class.field_info[k].type, v)] }.to_h

  if server?
    fields.merge!(self.class.privilege_fields)
  end

  defaults = self.class.field_info.map{|k, d| [d.name, d.params[:default]] if d.params.has_key?(:default) }.compact.to_h
  fields = defaults.merge(fields)
  @fields = defaults.merge(fields)
  @listeners = {}
end

Instance Attribute Details

#fields ⇒ Object (readonly)

Returns the value of attribute fields.



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# File 'lib/menilite/model.rb', line 30

def fields
  @fields
end

Class Method Details

.[](id) ⇒ Object 



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# File 'lib/menilite/model.rb', line 298

def [](id)
  self.init
  store.find(self, id)
end

.action(name, options = {}, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 226

def action(name, options = {}, &block)
  action_info[name.to_s] = ActionInfo.new(name, block.parameters, options)
  if server?
    self.instance_eval do
      if options[:class]
        define_singleton_method(name, block)
      else
        define_method(name, block)
      end
    end
  else
    method = Proc.new do |model, *args, &callback| # todo: should adopt keyword parameters
      action_url = options[:save] || options[:class] ? "api/#{self}/#{name}" : "api/#{self}/#{model.id}/#{name}"
      post_data = { args: args }

      if options[:save]
        begin
          model.validate_all
        rescue => e
          callback.call(:validation_error, e) if callback
          return
        end
        post_data[:model] = model.to_h
      end

      Browser::HTTP.post(action_url, post_data.to_json) do
        on :success do |res|
          callback.call(:success, res) if callback
        end

        on :failure do |res|
          if callback
            if res.json[:result] == 'validation_error'
              callback.call(:validation_error, Menilite::ValidationError.new(res.json[:messages]))
            else
              callback.call(:failure, res)
            end
          end
        end
      end
    end
    self.instance_eval do
      if options[:class]
        define_singleton_method(name) {|*args, &callback| method.call(self, *args, &callback) }
      else
        define_method(name) {|*args, &callback| method.call(self, *args, &callback) }
      end
    end
  end
end

.action_info ⇒ Object 



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# File 'lib/menilite/model.rb', line 109

def action_info
  @action_info ||= {}
end

.create(fields = {}, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 123

def create(fields={}, &block)
  self.init
  self.new(fields).save(&block)
end

.delete_all ⇒ Object 



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# File 'lib/menilite/model.rb', line 128

def delete_all
  self.init
  store.delete(self)
end

.fetch(filter: {}, order: nil) ⇒ Object 



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# File 'lib/menilite/model.rb', line 133

def fetch(filter: {}, order: nil)
  self.init
  filter = filter.map{|k, v| type_convert(k.to_sym, v) }.to_h

  if_server do
    filter.merge!(privilege_filter)
  end

  store.fetch(self, filter: filter, order: order) do |list|
    yield list if block_given?
    list
  end
end

.field(name, type = :string, params = {}) ⇒ Object 



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# File 'lib/menilite/model.rb', line 173

def field(name, type = :string, params = {})
  params.merge!(client: true, server: true)

  if client?
    return unless params[:client]
  else
    return unless params[:server]
  end

  if type == :reference
    field_info[:"#{name}_id"] = FieldInfo.new(name, type, params)
  else
    field_info[name] = FieldInfo.new(name, type, params)
  end

  self.instance_eval do
    if type == :reference
      field_name = "#{name}_id"

      define_method(name) do
        id = @fields[field_name.to_sym]
        next nil unless id
        model_class = Object.const_get(name.to_s.camel_case)
        model_class[id]
      end

      define_method(name.to_s + "=") do |value|
        @fields[field_name.to_sym] = value.id
      end
    else
      field_name = name.to_s
    end

    define_method(field_name) do
      value = @fields[field_name.to_sym]
      if type.is_a?(Hash) && type.keys.first == :enum
        value = type[:enum][value]
      end
      value
    end

    define_method(field_name + "=") do |value|
      unless type_validator(type).call(value, name)
        raise TypeError.new("type error: field_name: #{name}, value: #{value}")
      end
      @fields[field_name.to_sym] = convert_value(type, value)
      handle_event(:change, field_name.to_sym, value)
    end
  end
end

.field_info ⇒ Object 



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# File 'lib/menilite/model.rb', line 105

def field_info
  @field_info ||= {}
end

.find(id) ⇒ Object 



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# File 'lib/menilite/model.rb', line 286

def find(id)
  self.init

  case id
  when String
    self[id]
  when Hash
    self.fetch(filter:id).first
  end

end

.inherited(child) ⇒ Object 



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# File 'lib/menilite/model.rb', line 167

def inherited(child)
  subclasses[child] = false
end

.init ⇒ Object 



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# File 'lib/menilite/model.rb', line 98

def init
  if Model.subclasses.has_key?(self) && !Model.subclasses[self]
    store.register(self)
    Model.subclasses[self] = true
  end
end

.max(field_name) ⇒ Object 



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# File 'lib/menilite/model.rb', line 303

def max(field_name)
  self.init
  store.max(self, field_name)
end

.permit(privileges) ⇒ Object 



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# File 'lib/menilite/model.rb', line 308

def permit(privileges)
  Menilite.if_server do
    case privileges
    when Array
      self.privileges.push(*privileges)
    when Symbol, String
      self.privileges << privileges
    end
  end
end

.save(collection, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 117

def save(collection, &block)
  self.init
  colection.each {|obj| obj.validate_all }
  self.store.save(collection, &block)
end

.store ⇒ Object 



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# File 'lib/menilite/model.rb', line 159

def store
  Store.instance
end

.subclasses ⇒ Object 



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# File 'lib/menilite/model.rb', line 163

def subclasses
  @subclasses ||= {}
end

.type_convert(key, value) ⇒ Object 



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# File 'lib/menilite/model.rb', line 147

def type_convert(key, value)
  field_info = self.field_info[key] || self.field_info[key.to_s.sub(/_id\z/,'').to_sym]
  raise "no such field #{key} in #{self}" unless field_info
  converted = case field_info.type
              when :boolean
                value.is_a?(String) ? (value == 'true' ? true : false) : value
              else
                value
              end
  [key, converted]
end

.validation(field_name, params = {}, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 277

def validation(field_name, params = {}, &block)
  params.each do |k, v|
    if validator = Validators[k, v]
      (validators[field_name] ||= []) << validator.new(self, field_name)
    end
  end
  (validators[field_name] ||= []) << Validator.new(self, field_name, &block) if block
end

.validators ⇒ Object 



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# File 'lib/menilite/model.rb', line 113

def validators
  @validators ||= {}
end

Instance Method Details

#handle_event(event, field_name, value) ⇒ Object 



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# File 'lib/menilite/model.rb', line 88

def handle_event(event, field_name, value)
  get_listeners(event, field_name).each do |listener|
    listener.call(value)
  end
  value
end

#id ⇒ Object 



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# File 'lib/menilite/model.rb', line 58

def id
  @guid
end

#on(event, *field_names, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 84

def on(event, *field_names, &block)
  field_names.each {|file_name| set_listener(event, file_name, &block) }
end

#save(&block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 62

def save(&block)
  self.validate_all
  self.class.store.save(self, &block)
  self
end

#to_h ⇒ Object 



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# File 'lib/menilite/model.rb', line 392

def to_h
  @fields.merge(id: @guid)
end

#to_json(arg) ⇒ Object 



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# File 'lib/menilite/model.rb', line 396

def to_json(arg)
  @fields.merge(id: @guid).to_json
end

#type_validate(name, value) ⇒ Object 



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# File 'lib/menilite/model.rb', line 372

def type_validate(name, value)
  field_info = self.class.field_info[name]
  field_info or raise ArgumentError.new("field '#{name}' is not defind")

  type_validator = type_validator(field_info.type)
  type_validator.call(value, field_info.name) or raise TypeError.new("type error: field_name: #{field_info.name}, value: #{value}")
end

#type_validator(type) ⇒ Object 



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# File 'lib/menilite/model.rb', line 340

def type_validator(type)
  case type
    when :string
      -> (value, name) { value.nil? || value.is_a?(String) }
    when :int
      -> (value, name) { value.nil? || value.is_a?(Integer) }
    when :boolean
      -> (value, name) { value.nil? || value == true || value == false }
    when :date
      -> (value, name) { value.nil? || value.is_a?(Date) || value.is_a?(String) }
    when :time
      -> (value, name) { value.nil? || value.is_a?(Time) }
    when Hash
      if type.keys.first == :enum
        -> (value, name) { value.nil? || value.is_a?(Integer) || type[:enum].include?(value) }
      else
        raise TypeError.new("type error")
      end
    when :reference
      -> (value, name) { value.nil? || validate_reference(value, name) }
    else
      raise TypeError.new("type error. type: #{type.inspect}")
  end
end

#update(data) ⇒ Object 



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# File 'lib/menilite/model.rb', line 68

def update(data)
  case data
  when self.class
    @fields.merge!(data.fields)
  when Hash
    @fields.merge!(data.map{|k, v| resolve_references(k, v) }.to_h)
  when String
    @fields.merge!(JSON.parse(json))
  end
end

#update!(data, &block) ⇒ Object 



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# File 'lib/menilite/model.rb', line 79

def update!(data, &block)
  self.update(data)
  self.save(&block)
end

#validate(name, value) ⇒ Object 



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# File 'lib/menilite/model.rb', line 380

def validate(name, value)
  validators = self.class.validators[name]
  if validators
    messages = validators.select(&:enabled?).map {|validator| validator.validate(value) }.compact
  end
end

#validate_all ⇒ Object 



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# File 'lib/menilite/model.rb', line 387

def validate_all
  messages = self.class.field_info.flat_map {|k, info| validate(k, self.fields[k]) }.compact
  messages.empty? or raise ValidationError.new(messages)
end

#validate_reference(value, name) ⇒ Object 



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# File 'lib/menilite/model.rb', line 365

def validate_reference(value, name)
  return false unless value.is_a?(String) || value.is_a?(Menilite::Model)

  model_class = Object.const_get(name.to_s.camel_case)
  not model_class[value].nil?
end