Page API

Response

Use the response method to define the UI of the page by using Matestack's HTML rendering or calling components.

class SomePage < Matestack::Ui::Page

  def response
    div id: "div-on-page" do
      SomeComponent.()
    end
  end

end

  class SomeComponent < Matestack::Ui::Component

    def response
      div id: "my-component" do
        plain "hello world!"
      end
    end

  end

Partials and helper methods

Use partials to keep the code dry and indentation layers manageable!

Local partials on page level

In the page definition, see how this time from inside the response, the my_partial method below is called:

class SomePage < Matestack::Ui::Page

  def response
    div id: "my-page" do
      my_partial "foo from page"
    end
  end

  private # optionally mark your partials as private

  def my_partial text
    div class: "nested"
      plain text
    end
  end

end

Partials defined in modules

Extract code snippets to modules for an even better project structure. First, create a module:

module MySharedPartials

  def my_partial text
    div class: "nested"
      plain text
    end
  end

end

Include the module in the page:

class SomePage < Matestack::Ui::Page

  include MySharedPartials

  def response
    div id: "my-page" do
      my_partial "foo from component"
    end
  end

end

Helper methods

Not only can instance methods be used as "partials" but as general helpers performing any kind of logic or data resolving:

class SomePage < Matestack::Ui::Page

  def response
    div id: "my-page" do
      if is_admin?
        latest_users.each do |user|
          div do
            plain user.name # ...
          end
        end
      else
        plain "not authorized"
      end 
    end
  end

  private # optionally mark your helper methods as private

  def is_admin?
    true # some crazy Ruby logic!
  end

  def latest_users
    User.last(10) # calling ActiveRecord models for example
  end

end

Prepare

Use a prepare method to resolve instance variables before rendering a page if required.

class SomePage < Matestack::Ui::Page

  def prepare
    @some_data = "some data"
  end

  def response
    div id: "my-page" do
      plain @some_data
    end
  end

end

Params access

A page can access request information, e.g. url query params, by calling the params method:

class SomePage < Matestack::Ui::Page

  def response
    div id: "my-page" do
      plain params[:foo]
    end
  end

end

Now, visiting the respective route to the page, e.g. via /xyz?foo=bar, the page reads the [:foo] from the params and displays it.

Passing data to pages

Sometimes you want to pass in data from the calling controller action into the page. This works the same way as seen at components:

class SoomeController < ActionController::Base

  include Matestack::Ui::Core::Helper

  def some_page
    render SomePage, foo: 'bar', bar: 'baz'
  end

end

class SomePage < Matestack::Ui::Page

  required :foo
  optional :bar

  def response
    div id: "my-page" do
      plain context.foo # "bar"
      plain context.bar # "baz"
    end
  end

end