Class: Grell::Page::VisitedPage::Link

Inherits:
Object
  • Object
show all
Defined in:
lib/grell/page.rb

Overview

Private class to group all the methods related to links.

Instance Method Summary collapse

Constructor Details

#initialize(anchor) ⇒ Link

Returns a new instance of Link.



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# File 'lib/grell/page.rb', line 221

def initialize(anchor)
  @anchor = anchor
end

Instance Method Details

#disabled? ⇒ Boolean

Is the link disabled by either Javascript or CSS?

Returns:

  • (Boolean) 


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# File 'lib/grell/page.rb', line 231

def disabled?
  @anchor.disabled? || !!@anchor.native.attributes['disabled']
end

#href ⇒ Object

Some links may use data-href + javascript to do interesting things



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# File 'lib/grell/page.rb', line 241

def href
  @anchor['href'] || @anchor['data-href']
end

#inside_header? ⇒ Boolean

<link> can only be used in the <head> as of: developer.mozilla.org/en/docs/Web/HTML/Element/link

Returns:

  • (Boolean) 


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# File 'lib/grell/page.rb', line 226

def inside_header?
  @anchor.tag_name == 'link'
end

#js_href? ⇒ Boolean

Does the href use javascript?

Returns:

  • (Boolean) 


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# File 'lib/grell/page.rb', line 236

def js_href?
  href.start_with?('javascript:')
end

#to_url(host) ⇒ Object

We only accept links in this same host that start with a path



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# File 'lib/grell/page.rb', line 246

def to_url(host)
  uri = URI.parse(href)
  if uri.absolute?
    if uri.host != URI.parse(host).host
      Grell.logger.debug "GRELL does not follow links to external hosts: #{href}"
      nil
    else
      href # Absolute link to our own host
    end
  else
    if uri.path.nil?
      Grell.logger.debug "GRELL does not follow links without a path: #{uri}"
      nil
    end
    if uri.path.start_with?('/')
      host + href  # convert to full URL
    else # links like href="google.com" the browser would go to http://google.com like "http://#{link}"
      Grell.logger.debug "GRELL Bad formatted link: #{href}, assuming external"
      nil
    end
  end
rescue URI::InvalidURIError # Invalid links propagating till we navigate to them
  href
end