Class: Volt::URL

Inherits:
Object show all
Includes:
ReactiveAccessors
Defined in:
lib/volt/models/url.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ReactiveAccessors

included

Constructor Details

#initialize(router = nil) ⇒ URL

Returns a new instance of URL.



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# File 'lib/volt/models/url.rb', line 11

def initialize(router = nil)
  @router = router
  @params = Model.new({}, persistor: Persistors::Params)
end

Instance Attribute Details

#router ⇒ Object

Returns the value of attribute router.



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# File 'lib/volt/models/url.rb', line 9

def router
  @router
end

Instance Method Details

#full_url ⇒ Object

Full url rebuilds the url from it’s constituent parts



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# File 'lib/volt/models/url.rb', line 61

def full_url
  host_with_port = host
  host_with_port += ":#{port}" if port && port != 80

  self.path, params = @router.params_to_url(@params.to_h)

  new_url    = "#{scheme}://#{host_with_port}#{path.chomp('/')}"

  # Add query params
  params_str = ''
  unless params.empty?
    query_parts = []
    nested_params_hash(params).each_pair do |key, value|
      # remove the _ from the front
      value = `encodeURI(value)`
      query_parts << "#{key[1..-1]}=#{value}"
    end

    if query_parts.size > 0
      self.query = query_parts.join('&')
      new_url    += '?' + query
    end
  end

  # Add fragment
  frag    = fragment
  new_url += '#' + frag if frag.present?

  new_url
end

#parse(url) ⇒ Object

Parse takes in a url and extracts each sections. It also assigns and changes to the params.



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# File 'lib/volt/models/url.rb', line 18

def parse(url)
  if url[0] == '#'
    # url only updates fragment
    self.fragment = url[1..-1]
    update!
  else
    host     = `document.location.host`
    protocol = `document.location.protocol`

    if url !~ /[:]\/\//
      # Add the host for local urls
      url = protocol + "//#{host}" + url
    else
      # Make sure its on the same protocol and host, otherwise its external.
      if url !~ /#{protocol}\/\/#{host}/
        # Different host, don't process
        return false
      end
    end

    matcher         = url.match(/^(#{protocol[0..-2]})[:]\/\/([^\/]+)(.*)$/)
    self.scheme     = matcher[1]
    self.host, port = matcher[2].split(':')

    self.port = (port || 80).to_i

    path           = matcher[3]
    path, fragment = path.split('#', 2)
    path, query    = path.split('?', 2)

    self.path     = path
    self.fragment = fragment
    self.query    = query

    assign_query_hash_to_params
  end

  scroll

  true
end

#scroll ⇒ Object 



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# File 'lib/volt/models/url.rb', line 109

def scroll
  if Volt.client?
    frag = fragment
    if frag.present?
      # Scroll to anchor via http://www.w3.org/html/wg/drafts/html/master/browsers.html#scroll-to-fragid
      `
      var anchor = $('#' + frag);
      if (anchor.length == 0) {
        anchor = $('*[name="' + frag + '"]:first');
      }
      if (anchor && anchor.length > 0) {
        console.log('scroll to: ', anchor.offset().top);
        $(document.body).scrollTop(anchor.offset().top);
      }
    `
    else
      # Scroll to the top by default
      `$(document.body).scrollTop(0);`
    end
  end
end

#update! ⇒ Object

Called when the state has changed and the url in the browser should be updated Called when an attribute changes to update the url



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# File 'lib/volt/models/url.rb', line 95

def update!
  if Volt.client?
    new_url = full_url

    # Push the new url if pushState is supported
    # TODO: add fragment fallback
    `
    if (document.location.href != new_url && history && history.pushState) {
      history.pushState(null, null, new_url);
    }
  `
  end
end