Redmine 3.4.4

lib/plugins/gravatar/lib/gravatar.rb

@@ -0,0 +1,86 @@
+require 'digest/md5'
+require 'cgi'
+
+module GravatarHelper
+
+  # These are the options that control the default behavior of the public
+  # methods. They can be overridden during the actual call to the helper,
+  # or you can set them in your environment.rb as such:
+  #
+  #   # Allow racier gravatars
+  #   GravatarHelper::DEFAULT_OPTIONS[:rating] = 'R'
+  #
+  DEFAULT_OPTIONS = {
+    # The URL of a default image to display if the given email address does
+    # not have a gravatar.
+    :default => nil,
+    
+    # The default size in pixels for the gravatar image (they're square).
+    :size => 50,
+    
+    # The maximum allowed MPAA rating for gravatars. This allows you to 
+    # exclude gravatars that may be out of character for your site.
+    :rating => 'PG',
+    
+    # The alt text to use in the img tag for the gravatar.  Since it's a
+    # decorational picture, the alt text should be empty according to the
+    # XHTML specs.
+    :alt => '',
+
+    # The title text to use for the img tag for the gravatar.
+    :title => '',
+    
+    # The class to assign to the img tag for the gravatar.
+    :class => 'gravatar',
+    
+    # Whether or not to display the gravatars using HTTPS instead of HTTP
+    :ssl => false,
+  }
+  
+  # The methods that will be made available to your views.
+  module PublicMethods
+  
+    # Return the HTML img tag for the given user's gravatar. Presumes that 
+    # the given user object will respond_to "email", and return the user's
+    # email address.
+    def gravatar_for(user, options={})
+      gravatar(user.email, options)
+    end
+
+    # Return the HTML img tag for the given email address's gravatar.
+    def gravatar(email, options={})
+      src = h(gravatar_url(email, options))
+      options = DEFAULT_OPTIONS.merge(options)
+      [:class, :alt, :title].each { |opt| options[opt] = h(options[opt]) }
+
+      # double the size for hires displays
+      options[:srcset] = "#{gravatar_url(email, options.merge(size: options[:size].to_i * 2))} 2x"
+
+      image_tag src, options.except(:rating, :size, :default, :ssl)
+    end
+    
+    # Returns the base Gravatar URL for the given email hash
+    def gravatar_api_url(hash)
+      "//www.gravatar.com/avatar/#{hash}"
+    end
+
+    # Return the gravatar URL for the given email address.
+    def gravatar_url(email, options={})
+      email_hash = Digest::MD5.hexdigest(email)
+      options = DEFAULT_OPTIONS.merge(options)
+      options[:default] = CGI::escape(options[:default]) unless options[:default].nil?
+      gravatar_api_url(email_hash).tap do |url|
+        opts = []
+        [:rating, :size, :default].each do |opt|
+          unless options[opt].nil?
+            value = h(options[opt])
+            opts << [opt, value].join('=')
+          end
+        end
+        url << "?#{opts.join('&')}" unless opts.empty?
+      end
+    end
+
+  end
+  
+end