Class: Recorder::Changeset

Inherits:
Object
  • Object
show all
Defined in:
lib/recorder/changeset.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(item, changes) ⇒ Changeset

Returns a new instance of Changeset.

Raises:

  • (ArgumentError) 


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# File 'lib/recorder/changeset.rb', line 7

def initialize(item, changes)
  raise ArgumentError unless changes&.respond_to?(:to_h)

  @item = item
  @changes = changes.to_h
end

Instance Attribute Details

#changes ⇒ Object (readonly)

Returns the value of attribute changes.



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# File 'lib/recorder/changeset.rb', line 5

def changes
  @changes
end

#item ⇒ Object (readonly)

Returns the value of attribute item.



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# File 'lib/recorder/changeset.rb', line 5

def item
  @item
end

Instance Method Details

#human_attribute_name(attribute) ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 18

def human_attribute_name(attribute)
  if defined?(Draper) && item.decorated?
    item.source.class.human_attribute_name(attribute.to_s)
  else
    item.class.human_attribute_name(attribute.to_s)
  end
end

#keys ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 14

def keys
  changes.try(:keys) || []
end

#next(attribute) ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 42

def next(attribute)
  try("next_#{attribute}") || next_version.try(attribute)
end

#next_version ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 46

def next_version
  return @next_version if defined?(@next_version)

  @next_version = item.dup

  changes.each do |key, change|
    @next_version.send("#{key}=", change[1])
  end

  @next_version
end

#previous(attribute) ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 26

def previous(attribute)
  try("previous_#{attribute}") || previous_version.try(attribute)
end

#previous_version ⇒ Object 



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# File 'lib/recorder/changeset.rb', line 30

def previous_version
  return @previous_version if defined?(@previous_version)

  @previous_version = item.dup

  changes.each do |key, change|
    @previous_version.send("#{key}=", change[0])
  end

  @previous_version
end