application_helper.rb

module ApplicationHelper

  def nav_header(key)
    active = false

    if key == :sample_a
      active = true if is_nav_active?(:sample_a1)
      active = true if is_nav_active?(:sample_a2)
      active = true if is_nav_active?(:sample_a3)
      text = 'Sample A'
    end

    if active
      link_to text, '#', class: 'collapsible-header waves-effect waves-teal active'
    else
      link_to text, '#', class: 'collapsible-header waves-effect waves-teal'
    end
  end

  def nav_header_li(key)
    active = false
    active = true if is_nav_active?(key)

    if key == :sample_b
      text = 'Sample B'
      path = '#'
    end

    if active
      content_tag :li, class: 'active' do
        link_to text, path, class: 'waves-effect waves-teal'
      end
    else
      content_tag :li do
        link_to text, path, class: 'waves-effect waves-teal'
      end
    end
  end

  def is_nav_active?(key)
    if key == :sample_a
      return true
    end
    if key == :sample_b
      return true
    end
    if key == :sample_c
      return true
    end
    return false
  end

  def nav_li(key)
    active = false
    active = true if is_nav_active?(key)

    if key == :sample_a1
      text   = 'Sample A1'
      path   = '#'
      method ='GET'
    end
    if key == :sample_a2
      text   = 'Sample A2'
      path   = '#'
      method ='GET'
    end
    if key == :sample_a3
      text   = 'Sample A3'
      path   = '#'
      method ='GET'
    end
    if active
      content_tag :li, class: 'active' do
        if method && method != 'GET'
          link_to text, path, method: method
        else
          link_to text, path
        end
      end
    else
      content_tag :li do
        if method && method != 'GET'
          link_to text, path, method: method
        else
          link_to text, path
        end
      end
    end
  end
end