added Gravatar support through avatar gem

README

@@ -43,6 +43,7 @@ Install the Required Gems:
 - acts_as_ferret
 - ferret
 - win32console (windows only)
+- avatar
 
 TIP:
 Installing ferret on Windows

app/helpers/photos_helper.rb

@@ -1,30 +1,41 @@
 module PhotosHelper
 
-
-
-  def image photo, size = :square, img_opts = {}
-    return image_tag(image_path( photo, size), :class => size) if photo.image.blank?
-    img_tag = image_tag(image_path( photo, size), {:title=>photo.caption, :alt=>photo.caption, :class=>size}.merge(img_opts))
-    img_tag
+  def self.included(base)
+    #this gets auto-included, but only later, so do it now:
+    base.send :include, ActionView::Helpers::AssetTagHelper
+
+    #replace image_path with a version that understands stored photos:
+    unless base.method_defined?(:image_path_without_photo)
+      base.send :alias_method, :image_path_without_photo, :image_path
+    end
+    base.send :include, PhotosHelper::InstanceMethods
   end
 
+  module InstanceMethods
+    def image photo, size = :square, img_opts = {}
+      return image_tag(image_path( photo, size), :class => size) if photo.image.blank?
+      img_tag = image_tag(image_path( photo, size), {:title=>photo.caption, :alt=>photo.caption, :class=>size}.merge(img_opts))
+      img_tag
+    end
 
+    def photo_path photo, size
+      return "/images/missing_#{size}.png" if photo.image.blank?
+      if size
+        path = url_for_image_column(photo, :image, size) rescue path = "/images/missing_#{size}.png"
+        # QUESTION: Is there a way to do a file column return on a fixture and return a
+        # fake path when the actual path DNE?  Returns nil if file missing
+        path = "/images/missing_#{size}.png" if path.nil?
+      else
+        path = url_for_file_column(photo, :image) rescue path = "/images/missing_.png"
+        # QUESTION: Is there a way to do a file column return on a fixture and return a
+        # fake path when the actual path DNE?  Returns nil if file missing
+        path = "/images/missing_.png" if path.nil? 
+      end
+      return path
+    end
 
-  def image_path photo = nil, size = :square
-    return "/images/missing_#{size}.png" if photo.image.blank?
-    if size
-      path = url_for_image_column(photo, :image, size) rescue path = "/images/missing_#{size}.png"
-      # QUESTION: Is there a way to do a file column return on a fixture and return a
-      # fake path when the actual path DNE?  Returns nil if file missing
-      path = "/images/missing_#{size}.png" if path.nil?
-    else
-      path = url_for_file_column(photo, :image) rescue path = "/images/missing_.png"
-      # QUESTION: Is there a way to do a file column return on a fixture and return a
-      # fake path when the actual path DNE?  Returns nil if file missing
-      path = "/images/missing_.png" if path.nil? 
+    def image_path(source_or_photo, size = :square)
+      source_or_photo.respond_to?(:image) ? photo_path(source_or_photo, size) : image_path_without_photo(source_or_photo)
     end
-    return path
   end
-
-
-end
+end

app/helpers/profiles_helper.rb

@@ -1,19 +1,22 @@
+require 'avatar/view/action_view_support'
+
 module ProfilesHelper
+  include Avatar::View::ActionViewSupport
 
   def icon profile, size = :small, img_opts = {}
-    return link_to(image_tag(icon_path( profile, size), {:title=>profile.full_name, :alt=>profile.full_name, :class=>size}.merge(img_opts)), profile_path(profile)) if profile.icon.blank?
-    link_to(image_tag(icon_path( profile, size), {:title=>profile.full_name, :alt=>profile.full_name, :class=>size}.merge(img_opts)), profile_path(profile)) rescue ''
-  end
-
-
-
-  def icon_path profile = nil, size = :small
-    return "/images/avatar_default_#{size}.png" if profile.icon.blank?
-    url_for_image_column(profile, :icon, size) rescue "/images/avatar_default_#{size}.png"
+    return "" if profile.nil?
+    img_opts = img_opts.merge(:title => profile.full_name, :alt => profile.full_name, :class => size).merge(img_opts)
+    link_to(avatar_tag(profile, {:size => size, :file_column_version => size, :default => default_image_url(size)}, img_opts))
   end
 
   def location_link profile = @p
     return profile.location if profile.location == Profile::NOWHERE
     link_to h(profile.location), search_profiles_path.add_param('search[location]' => profile.location)
   end
+
+  private
+  def default_image_url(size)
+    req = controller.request
+    "#{req.protocol}#{req.host_with_port}#{image_path("/images/avatar_default_#{size}.png")}"
+  end
 end

app/models/photo.rb

@@ -24,9 +24,8 @@ def after_create
     feed_item = FeedItem.create(:item => self)
     ([profile] + profile.friends + profile.followers).each{ |p| p.feed_items << feed_item }
   end
-
-
-  file_column :image, :root_path => File.join(RAILS_ROOT, "public/system"), :web_root => 'system/', :magick => {
+
+  file_column :image, :magick => {
     :versions => { 
       :square => {:crop => "1:1", :size => "50x50", :name => "square"},
       :small => "175x250>"

app/models/profile.rb

@@ -68,11 +68,11 @@ class Profile < ActiveRecord::Base
 
   acts_as_ferret :fields => [ :location, :f, :about_me ], :remote=>true
 
-  file_column :icon, :root_path => File.join(RAILS_ROOT, "public/system"), :web_root => 'system/', :magick => {
+  file_column :icon, :magick => {
     :versions => { 
-    :big => {:crop => "1:1", :size => "150x150", :name => "big"},
-    :medium => {:crop => "1:1", :size => "100x100", :name => "medium"},
-    :small => {:crop => "1:1", :size => "50x50", :name => "small"}
+      :big => {:crop => "1:1", :size => "150x150", :name => "big"},
+      :medium => {:crop => "1:1", :size => "100x100", :name => "medium"},
+      :small => {:crop => "1:1", :size => "50x50", :name => "small"}
     }
   }
 

config/initializers/avatar_sources.rb

@@ -0,0 +1,26 @@
+require 'avatar'
+require 'avatar/source/file_column_source'
+require 'avatar/source/source_chain'
+require 'avatar/source/string_substitution_source'
+require 'sized_gravatar_source'
+
+# order:
+# 1.  FileColumn(Profile.icon)
+# 2.  Gravatar(nil_source, Profile.email)
+#
+# Gravatar accepts a default if no gravatar exists for the
+# email address passed.  Unfortunately, it needs to be
+# a full URL (not just a path relative to the request).
+# Thus, this won't work:
+#   gravatar.default_source = Avatar::Source::StringSubstitutionSource.new('/images/avatar_default_#{size}.png')
+# Instead, we have to pass in a default in the avatar_url_for
+# call in app/helpers/profiles_helper
+#
+# Additionally, Gravatar does not understand :small, :medium, and :big,
+# so we must translate using SizedGravatarSource
+
+chain = Avatar::Source::SourceChain.new
+chain << Avatar::Source::FileColumnSource.new(:icon)
+chain << SizedGravatarSource.new(nil, :email)
+
+Avatar::source = chain

config/initializers/file_column_settings.rb

@@ -0,0 +1,2 @@
+FileColumn::ClassMethods::DEFAULT_OPTIONS[:root_path] = File.join(RAILS_ROOT, "public", 'system')
+FileColumn::ClassMethods::DEFAULT_OPTIONS[:web_root] = 'system/'

lib/sized_gravatar_source.rb

@@ -0,0 +1,16 @@
+require 'avatar/source/gravatar_source'
+
+class SizedGravatarSource < Avatar::Source::GravatarSource
+
+  alias_method :parse_options_without_size, :parse_options
+
+  def self.sizes
+    { :small => 50, :medium => 100, :large => 150, :big => 150 }
+  end
+
+  def parse_options(profile, options)
+    options[:size] = self.class.sizes[options[:size]] if self.class.sizes.has_key?(options[:size])
+    parse_options_without_size(profile, options)
+  end
+
+end

lib/tasks/getting_started.rake

@@ -16,6 +16,7 @@ namespace :gems do
           imagick
           acts_as_ferret
           ferret
+          avatar
         ]
       gems << 'win32console' if windoz
       sudo = windoz ? '' : 'sudo '

test/fixtures/profiles.yml

@@ -25,13 +25,14 @@
 #
 
 # Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
+
 user:
     user: user
     first_name: De
     last_name: Veloper
     email: [email protected]
     is_active: true
-    icon: Photo_2.jpg
+    icon: user.png
 
 user2:
     user: user2

test/functional/profiles_controller_test.rb

@@ -112,6 +112,33 @@ class ProfilesControllerTest < ActionController::TestCase
     should_render_template :edit
     should_render_a_form
     should_not_set_the_flash
+  end  
+
+  context 'rendering an avatar' do
+
+    should 'use the user\'s icon if it exists' do
+      p =  profiles(:user)
+      p.icon = File.new(File.join(RAILS_ROOT, ['test', 'public','images','user.png']))
+      p.save!
+      #raise (p.send :icon_state).inspect
+      assert_not_nil p.icon
+      get :show, {:id => p.id, :public_view => true}, {:user => p.id}
+      assert_tag :img, :attributes => { :src => /\/system\/profile\/icon\/\d*\/big\/user.png/ }
+    end
+
+    should 'use gravatar otherwise' do
+      p =  profiles(:user2)
+      assert_nil p.icon
+      get :show, {:id => p.id}, {:user => p.id, :public_view => true}
+      assert_tag :img, :attributes => {:src => /www\.gravatar\.com/}
+    end
+
+    should 'send the app\'s internal default as the default to gravatar' do
+      p =  profiles(:user2)
+      assert_nil p.icon
+      get :show, {:id => p.id}, {:user => p.id, :public_view => true}
+      assert_tag :img, :attributes => {:src => /www\.gravatar\.com.*default=http:\/\/test.host\/images\/avatar_default_.*\.png/}
+    end
   end
 
 

test/test_helper.rb

@@ -5,6 +5,10 @@
 require 'ostruct'
 require 'mocha'
 
+# for testing uploaded files
+# place any "already uploaded" files in a subdirectory within /test/ instead of overwriting production files.
+FileColumn::ClassMethods::DEFAULT_OPTIONS[:root_path] = File.join(RAILS_ROOT, 'test', "public", 'system')
+
 class Test::Unit::TestCase
   # Transactional fixtures accelerate your tests by wrapping each test method
   # in a transaction that's rolled back on completion.  This ensures that the
@@ -117,6 +121,5 @@ def _test_actions(controller, options={})
 
   # Teardown and setup - for quick recycling of env. within a single test
   def recycle; teardown; setup; end
-
 
 end