90 lines
3.0 KiB
Ruby
90 lines
3.0 KiB
Ruby
#-- encoding: UTF-8
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require 'digest/md5'
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require 'cgi'
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module GravatarHelper
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# These are the options that control the default behavior of the public
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# methods. They can be overridden during the actual call to the helper,
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# or you can set them in your environment.rb as such:
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#
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# # Allow racier gravatars
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# GravatarHelper::DEFAULT_OPTIONS[:rating] = 'R'
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#
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DEFAULT_OPTIONS = {
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# The URL of a default image to display if the given email address does
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# not have a gravatar.
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:default => nil,
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# The default size in pixels for the gravatar image (they're square).
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:size => 50,
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# The maximum allowed MPAA rating for gravatars. This allows you to
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# exclude gravatars that may be out of character for your site.
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:rating => 'PG',
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# The alt text to use in the img tag for the gravatar. Since it's a
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# decorational picture, the alt text should be empty according to the
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# XHTML specs.
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:alt => '',
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# The title text to use for the img tag for the gravatar.
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:title => '',
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# The class to assign to the img tag for the gravatar.
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:class => 'gravatar',
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# Whether or not to display the gravatars using HTTPS instead of HTTP
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:ssl => false,
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}
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# The methods that will be made available to your views.
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module PublicMethods
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# Return the HTML img tag for the given user's gravatar. Presumes that
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# the given user object will respond_to "email", and return the user's
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# email address.
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def gravatar_for(user, options={})
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gravatar(user.email, options)
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end
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# Return the HTML img tag for the given email address's gravatar.
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def gravatar(email, options={})
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src = h(gravatar_url(email, options))
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options = DEFAULT_OPTIONS.merge(options)
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[:class, :alt, :size, :title].each { |opt| options[opt] = h(options[opt]) }
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"<img class=\"#{options[:class]}\" alt=\"#{options[:alt]}\" title=\"#{options[:title]}\" width=\"#{options[:size]}\" height=\"#{options[:size]}\" src=\"#{src}\" />"
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end
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# Returns the base Gravatar URL for the given email hash. If ssl evaluates to true,
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# a secure URL will be used instead. This is required when the gravatar is to be
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# displayed on a HTTPS site.
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def gravatar_api_url(hash, ssl=false)
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if ssl
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"https://secure.gravatar.com/avatar/#{hash}"
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else
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"http://www.gravatar.com/avatar/#{hash}"
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end
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end
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# Return the gravatar URL for the given email address.
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def gravatar_url(email, options={})
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email_hash = Digest::MD5.hexdigest(email)
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options = DEFAULT_OPTIONS.merge(options)
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options[:default] = CGI::escape(options[:default]) unless options[:default].nil?
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gravatar_api_url(email_hash, options.delete(:ssl)).tap do |url|
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opts = []
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[:rating, :size, :default].each do |opt|
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unless options[opt].nil?
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value = h(options[opt])
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opts << [opt, value].join('=')
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end
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end
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url << "?#{opts.join('&')}" unless opts.empty?
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end
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end
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end
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end
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