Class: FieldMapper::Standard::Plat

Inherits:
Object
  • Object
show all
Extended by:
NameHelper
Includes:
Marshaller, NameHelper
Defined in:
lib/field_mapper/standard/plat.rb

Direct Known Subclasses

Custom::Plat

Constant Summary

Constants included from Marshaller

Marshaller::OPTIONS

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NameHelper

attr_name

Methods included from Marshaller

#marshal, #unmarshal

Constructor Details

#initialize(params = {}) ⇒ Plat

Returns a new instance of Plat.



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# File 'lib/field_mapper/standard/plat.rb', line 94

def initialize(params={})
  @node_id = params["_node_id"]
  assign_defaults
  assign_params params
end

Instance Attribute Details

#node_id ⇒ Object (readonly)

Returns the value of attribute node_id.



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# File 'lib/field_mapper/standard/plat.rb', line 92

def node_id
  @node_id
end

Class Method Details

.field(name, type: nil, desc: nil, default: nil, placeholder: nil, &block) ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 24

def field(
  name,
  type: nil,
  desc: nil,
  default: nil,
  placeholder: nil,
  &block
)
  field_names[attr_name(name)] = name

  field = fields[name] = FieldMapper::Standard::Field.new(
    name,
    type: type,
    desc: desc,
    default: default,
    placeholder: placeholder
  )

  field.instance_exec(&block) if block_given?

  define_method(attr_name name) do
    self[name]
  end

  define_method("#{attr_name name}=") do |value|
    self[name] = value
  end
end

.field_names ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 20

def field_names
  @field_names ||= {}
end

.fields ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 16

def fields
  @fields ||= HashWithIndifferentAccess.new
end

.find_field(field_name) ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 53

def find_field(field_name)
  fields[field_names[attr_name(field_name)]]
end

.has_plat_fields? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/field_mapper/standard/plat.rb', line 57

def has_plat_fields?
  !plat_fields.empty?
end

.inspect ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 70

def inspect
  "#{name} #{new.snapshot.inspect}"
end

.plat_fields ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 61

def plat_fields
  fields.reduce({}) do |memo, keypair|
    if keypair.last.plat_field?
      memo[keypair.first] = keypair.last
    end
    memo
  end
end

.symbolize_hash(hash) ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 74

def symbolize_hash(hash)
  hash.reduce({}) do |memo, pair|
    key = pair.first.intern
    value = pair.last
    value = symbolize_hash(value) if value.is_a?(Hash)
    if value.is_a?(Array)
      value = value.map do |val|
        val = symbolize_hash(val) if val.is_a?(Hash)
        val
      end
    end
    memo[key] = value
    memo
  end
end

Instance Method Details

#[](field_name) ⇒ Object

Raises:



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# File 'lib/field_mapper/standard/plat.rb', line 119

def [](field_name)
  raise FieldNotDefined.new("#{self.class.name} does not define: #{field_name}") unless field_exists?(field_name)
  instance_variable_get "@#{attr_name(field_name)}"
end

#[]=(field_name, value) ⇒ Object

Raises:



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# File 'lib/field_mapper/standard/plat.rb', line 124

def []=(field_name, value)
  field = self.class.find_field(field_name)
  raise FieldNotDefined.new("#{self.class.name} does not define: #{field_name}") if field.nil?
  assign_param field_name, cast_value(field, value)
end

#after_convert(from: nil, to: nil) ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 115

def after_convert(from: nil, to: nil)
  # abstract method to be implemented by subclasses
end

#cache_key ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 205

def cache_key
  self.class.name + "-" + Digest::MD5.hexdigest(to_hash.to_s)
end

#inspect ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 100

def inspect
  "#<#{self.class.name}:0x00#{object_id.to_s(16)} #{snapshot.inspect}>"
end

#scope ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 104

def scope
  @scope ||= begin
    scope_name = self.class.name.split("::")[0..-2].join("::")
    if scope_name.empty?
      ::Object
    else
      ::Object.const_get(scope_name)
    end
  end
end

#snapshot ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 201

def snapshot
  self.class.symbolize_hash(to_hash(include_meta: false))
end

#to_hash(flatten: false, history: {}, include_meta: true, placeholders: false) ⇒ Object 



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# File 'lib/field_mapper/standard/plat.rb', line 130

def to_hash(flatten: false, history: {}, include_meta: true, placeholders: false)
  history[object_id] = true
  hash = self.class.fields.values.reduce(HashWithIndifferentAccess.new) do |memo, field|
    name = field.name
    value = instance_variable_get("@#{attr_name(name)}")

    if value.present?
      case field.type.name
      when "FieldMapper::Types::Plat" then
        if value.is_a? FieldMapper::Standard::Plat
          oid = value.object_id
          if history[oid].nil?
            history[oid] = true
            value = value.to_hash(
              flatten: flatten,
              history: history,
              include_meta: include_meta,
              placeholders: placeholders
            )
            value = marshal(value) if flatten
          else
            value = oid
          end
        else
          value
        end
      when "FieldMapper::Types::List" then
        if field.plat_list?
          value = value.map do |val|
            if val.is_a? FieldMapper::Standard::Plat
              oid = val.object_id
              if history[oid].nil?
                history[oid] = true
                val.to_hash(
                  flatten: flatten,
                  history: history,
                  include_meta: include_meta,
                  placeholders: placeholders
                )
              else
                oid
              end
            else
              val
            end
          end
        end
        value = marshal(value) if flatten
      when "Money" then
        value = value.format(with_currency: true)
      when "Time" then
        value = value.utc.iso8601
      end
    else
      value = field.placeholder || field.default if placeholders
    end

    memo[name] = value
    memo
  end

  if include_meta
    hash = {
      _node_id: object_id,
      _flat: flatten
    }.merge(hash)
  end

  HashWithIndifferentAccess.new(hash)
end