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Features

• Allow to detect roles for abilities object and scope #28

Bugs

• Raise error if application take invalid scope #31
• Raise error if user try to register roles ability #30

Chore

• Rubocop style checker for better quality
• New documentation page #21

• Allow to use callable objects as a role objects (@davydovanton) #20
• Allow to use classes as a role objects (@davydovanton) #18
• Add #permit matcher for rspec specs (@berniechiu) #15

We're happy to announce 0.2 version of kan.

Role system

Now kan support to write simple role based system. For this you need to define role block in each abilities classes:

module Post
  class AnonymousAbilities
    include Kan::Abilities

    role :anonymous do |user, _|
      user.id.nil?
    end

    register(:read, :edit, :delete) { false }
  end

  class BaseAbilities
    include Kan::Abilities

    role :all do |_, _|
      true
    end

    register(:read) { |_, _| true }
    register(:edit, :delete) { |user, post| false }
  end


  class AuthorAbilities
    include Kan::Abilities

    role :author do |user, post|
      user.id == post.author_id
    end

    register(:read, :edit) { |_, _| true }
    register(:delete) { |_, _| false }
  end

  class AdminAbilities
    include Kan::Abilities

    role :admin do |user, _|
      user.admin?
    end

    register :read, :edit, :delete { |_, _| true }
  end
end

After that initialize Kan application object and call it with payload:

abilities = Kan::Application.new(
  post: [Post::AnonymousAbilities.new, Post::BaseAbilities.new, Post::AuthorAbilities.new, Post::AdminAbilities.new],
  comment: Comments::Abilities.new
)

abilities['post.read'].call(anonymous, post) # => false
abilities['post.read'].call(regular, post)   # => true
abilities['post.read'].call(author, post)    # => true
abilities['post.read'].call(admin, post)     # => true

abilities['post.edit'].call(anonymous, post) # => false
abilities['post.edit'].call(regular, post)   # => false
abilities['post.edit'].call(author, post)    # => true
abilities['post.edit'].call(admin, post)     # => true

abilities['post.delete'].call(anonymous, post) # => false
abilities['post.delete'].call(regular, post)   # => false
abilities['post.delete'].call(author, post)    # => false
abilities['post.delete'].call(admin, post)     # => true

Logger support

Now you can use any logger instances in your abilities and roles:

class AnonymousAbilities
  include Kan::Abilities

  register(:read, :edit, :delete) do
    logger.info 'Anonymous ability checked'
    false
  end
end

And initialize your abilities instances with custom logger:

abilities = Kan::Application.new(
  comment: Comments::Abilities.new(logger: MyCustomLogger.new)
)

Credits

Thanks all developers why was helped with new release:

• @apotonick
• @etxzay
• @HolyWalley
• @RomanSerikov
• @valikos

❤️