From 6c1c8be79433f87bef9d768da7b8fa4ec9bb18d7 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Thu, 22 May 2014 17:37:02 +1000
Subject: [PATCH] Work in progress, keeping avatars locally

This introduces a new model to store the avatars and 3 uploads per user (gravatar, system and custom)

user can then pick which they want.
---
 .../controllers/avatar-selector.js.es6        |  18 +-
 .../discourse/helpers/application_helpers.js  |  26 +-
 .../javascripts/discourse/models/user.js      |   9 +
 .../discourse/models/user_action.js           |   2 +-
 .../discourse/routes/preferences_routes.js    |   7 +-
 .../modal/avatar_selector.js.handlebars       |  14 +-
 .../views/modal/avatar_selector_view.js       |   2 +-
 app/assets/stylesheets/desktop/modal.scss     |   8 +
 app/controllers/avatar_controller.rb          |  46 +++
 app/controllers/users_controller.rb           |   2 -
 app/jobs/regular/create_missing_avatars.rb    |  10 +
 app/jobs/regular/generate_avatars.rb          |  67 ----
 app/jobs/scheduled/detect_avatars.rb          |  31 --
 app/models/user.rb                            |  37 ++-
 app/models/user_action.rb                     |   4 +-
 app/models/user_avatar.rb                     |  53 +++
 app/models/user_stat.rb                       |   1 -
 app/serializers/basic_post_serializer.rb      |   5 +
 app/serializers/basic_user_serializer.rb      |  21 +-
 app/serializers/post_serializer.rb            |   3 +-
 .../topic_post_count_serializer.rb            |  10 +-
 app/serializers/user_action_serializer.rb     |  20 +-
 app/serializers/user_serializer.rb            |  25 +-
 config/initializers/06-mini_profiler.rb       |   1 +
 config/locales/client.en.yml                  |   4 +-
 config/locales/server.en.yml                  |   1 +
 config/routes.rb                              |   2 +
 config/site_settings.yml                      |   7 +-
 db/fixtures/005_users.rb                      |   5 +
 ...emove_has_custom_avatar_from_user_stats.rb |   5 +
 db/migrate/20140522003151_add_user_avatars.rb |  12 +
 lib/avatar_detector.rb                        |  32 --
 lib/avatar_lookup.rb                          |   2 -
 lib/composer_messages_finder.rb               |   2 +-
 lib/letter_avatar.rb                          | 303 ++++++++++++++++++
 lib/tasks/avatars.rake                        |  12 -
 spec/components/avatar_detector_spec.rb       |  67 ----
 .../composer_messages_finder_spec.rb          |   2 +-
 spec/controllers/users_controller_spec.rb     |   2 -
 spec/models/user_avatar_spec.rb               |  21 ++
 spec/models/user_spec.rb                      |  37 +--
 spec/spec_helper.rb                           |   7 +
 42 files changed, 626 insertions(+), 319 deletions(-)
 create mode 100644 app/controllers/avatar_controller.rb
 create mode 100644 app/jobs/regular/create_missing_avatars.rb
 delete mode 100644 app/jobs/regular/generate_avatars.rb
 delete mode 100644 app/jobs/scheduled/detect_avatars.rb
 create mode 100644 app/models/user_avatar.rb
 create mode 100644 db/migrate/20140520063859_remove_has_custom_avatar_from_user_stats.rb
 create mode 100644 db/migrate/20140522003151_add_user_avatars.rb
 delete mode 100644 lib/avatar_detector.rb
 create mode 100644 lib/letter_avatar.rb
 delete mode 100644 lib/tasks/avatars.rake
 delete mode 100644 spec/components/avatar_detector_spec.rb
 create mode 100644 spec/models/user_avatar_spec.rb

diff --git a/app/assets/javascripts/discourse/controllers/avatar-selector.js.es6 b/app/assets/javascripts/discourse/controllers/avatar-selector.js.es6
index ed165e45c..af6642bc7 100644
--- a/app/assets/javascripts/discourse/controllers/avatar-selector.js.es6
+++ b/app/assets/javascripts/discourse/controllers/avatar-selector.js.es6
@@ -10,12 +10,14 @@
 export default Discourse.Controller.extend(Discourse.ModalFunctionality, {
 
   actions: {
-    useUploadedAvatar: function() { this.set("use_uploaded_avatar", true); },
-    useGravatar: function() { this.set("use_uploaded_avatar", false); }
-  },
-
-  avatarTemplate: function() {
-    return this.get("use_uploaded_avatar") ? this.get("uploaded_avatar_template") : this.get("gravatar_template");
-  }.property("use_uploaded_avatar", "uploaded_avatar_template", "gravatar_template")
-
+    useUploadedAvatar: function() {
+      this.set("selected", "uploaded");
+    },
+    useGravatar: function() {
+      this.set("selected", "gravatar");
+    },
+    useSystem: function() {
+      this.set("selected", "system");
+    }
+  }
 });
diff --git a/app/assets/javascripts/discourse/helpers/application_helpers.js b/app/assets/javascripts/discourse/helpers/application_helpers.js
index 269f1c8da..6b3bacaf7 100644
--- a/app/assets/javascripts/discourse/helpers/application_helpers.js
+++ b/app/assets/javascripts/discourse/helpers/application_helpers.js
@@ -183,16 +183,6 @@ Handlebars.registerHelper('avatar', function(user, options) {
     var username = Em.get(user, 'username');
     if (!username) username = Em.get(user, options.hash.usernamePath);
 
-    var avatarTemplate;
-    var template = options.hash.template;
-    if (template && template !== 'avatar_template') {
-      avatarTemplate = Em.get(user, template);
-      if (!avatarTemplate) avatarTemplate = Em.get(user, 'user.' + template);
-    }
-
-    if (!avatarTemplate) avatarTemplate = Em.get(user, 'avatar_template');
-    if (!avatarTemplate) avatarTemplate = Em.get(user, 'user.avatar_template');
-
     var title;
     if (!options.hash.ignoreTitle) {
       // first try to get a title
@@ -209,6 +199,10 @@ Handlebars.registerHelper('avatar', function(user, options) {
       }
     }
 
+    // this is simply done to ensure we cache images correctly
+    var uploadedAvatarId = Em.get(user, 'uploaded_avatar_id') || Em.get(user, 'user.uploaded_avatar_id') || "_1";
+    var avatarTemplate = Discourse.User.avatarTemplate(username,uploadedAvatarId);
+
     return new Handlebars.SafeString(Discourse.Utilities.avatarImg({
       size: options.hash.imageSize,
       extraClasses: Em.get(user, 'extras') || options.hash.extraClasses,
@@ -228,11 +222,19 @@ Handlebars.registerHelper('avatar', function(user, options) {
   @for Handlebars
 **/
 Ember.Handlebars.registerBoundHelper('boundAvatar', function(user, options) {
+
+  var username = Em.get(user, 'username');
+
+  console.log(options.hash);
+
+  var uploadId = (options.hash.uploadId && Em.get(user, options.hash.uploadId)) || Em.get(user, 'uploaded_avatar_id');
+  var avatarTemplate = Discourse.User.avatarTemplate(username,uploadId);
+
   return new Handlebars.SafeString(Discourse.Utilities.avatarImg({
     size: options.hash.imageSize,
-    avatarTemplate: Em.get(user, options.hash.template || 'avatar_template')
+    avatarTemplate: avatarTemplate
   }));
-}, 'avatar_template', 'uploaded_avatar_template', 'gravatar_template');
+}, 'uploadId', 'username', 'uploaded_avatar_id');
 
 /**
   Nicely format a date without binding or returning HTML
diff --git a/app/assets/javascripts/discourse/models/user.js b/app/assets/javascripts/discourse/models/user.js
index 96ad0dd66..5e1138cc1 100644
--- a/app/assets/javascripts/discourse/models/user.js
+++ b/app/assets/javascripts/discourse/models/user.js
@@ -326,6 +326,10 @@ Discourse.User = Discourse.Model.extend({
     });
   },
 
+  avatarTemplate: function(){
+    return Discourse.User.avatarTemplate(this.get('username'),this.get('uploaded_avatar_id'));
+  }.property('uploaded_avatar_id', 'username'),
+
   /*
     Change avatar selection
 
@@ -413,6 +417,11 @@ Discourse.User = Discourse.Model.extend({
 });
 
 Discourse.User.reopenClass(Discourse.Singleton, {
+
+  avatarTemplate: function(username, uploadedAvatarId){
+    return Discourse.getURL("/avatar/" + username.toLowerCase() + "/{size}/" + uploadedAvatarId + ".png");
+  },
+
   /**
     Find a `Discourse.User` for a given username.
 
diff --git a/app/assets/javascripts/discourse/models/user_action.js b/app/assets/javascripts/discourse/models/user_action.js
index d4c32108b..9af722d11 100644
--- a/app/assets/javascripts/discourse/models/user_action.js
+++ b/app/assets/javascripts/discourse/models/user_action.js
@@ -184,7 +184,7 @@ Discourse.UserAction = Discourse.Model.extend({
   switchToActing: function() {
     this.setProperties({
       username: this.get('acting_username'),
-      avatar_template: this.get('acting_avatar_template'),
+      uploaded_avatar_id: this.get('acting_uploaded_avatar_id'),
       name: this.get('actingDisplayName')
     });
   }
diff --git a/app/assets/javascripts/discourse/routes/preferences_routes.js b/app/assets/javascripts/discourse/routes/preferences_routes.js
index 1c0f93786..5108dbd87 100644
--- a/app/assets/javascripts/discourse/routes/preferences_routes.js
+++ b/app/assets/javascripts/discourse/routes/preferences_routes.js
@@ -22,8 +22,11 @@ Discourse.PreferencesRoute = Discourse.RestrictedUserRoute.extend({
       // all the properties needed for displaying the avatar selector modal
       this.controllerFor('avatar-selector').setProperties(this.modelFor('user').getProperties(
         'username', 'email',
-        'has_uploaded_avatar', 'use_uploaded_avatar',
-        'gravatar_template', 'uploaded_avatar_template'));
+        'system_avatar_upload_id',
+        'gravatr_avatar_upload_id',
+        'custom_avatar_upload_id'
+        )
+      );
     },
 
     saveAvatarSelection: function() {
diff --git a/app/assets/javascripts/discourse/templates/modal/avatar_selector.js.handlebars b/app/assets/javascripts/discourse/templates/modal/avatar_selector.js.handlebars
index 1b7e54cc4..a70d12d48 100644
--- a/app/assets/javascripts/discourse/templates/modal/avatar_selector.js.handlebars
+++ b/app/assets/javascripts/discourse/templates/modal/avatar_selector.js.handlebars
@@ -1,15 +1,19 @@
 <div class="modal-body">
   <div>
     <div>
-      <input type="radio" id="avatar" name="avatar" value="gravatar" {{action useGravatar}}>
-      <label class="radio" for="avatar">{{avatar controller imageSize="large" template="gravatar_template"}} {{{i18n user.change_avatar.gravatar}}} {{email}}</label>
-      <a href="//gravatar.com/emails" target="_blank" title="{{i18n user.change_avatar.gravatar_title}}" class="btn no-text"><i class="fa fa-pencil"></i></a>
+      <input type="radio" id="system-avatar" name="avatar" value="system" {{action useSystem}}>
+      <label class="radio" for="system-avatar">{{boundAvatar controller imageSize="large" uploadId="system_avatar_upload_id"}} {{{i18n user.change_avatar.letter_based}}}</label>
+    </div>
+    <div>
+      <input type="radio" id="gravatar" name="avatar" value="gravatar" {{action useGravatar}}>
+      <label class="radio" for="gravatar">{{boundAvatar controller imageSize="large" uploadId="gravatar_avatar_upload_id"}} {{{i18n user.change_avatar.gravatar}}} {{email}}</label>
+      <a href="#" {{action refreshGravatar}} title="{{i18n user.change_avatar.refresh_gravatar_title}}" class="btn no-text"><i class="fa fa-refresh"></i></a>
     </div>
     <div>
       <input type="radio" id="uploaded_avatar" name="avatar" value="uploaded_avatar" {{action useUploadedAvatar}}>
       <label class="radio" for="uploaded_avatar">
-        {{#if has_uploaded_avatar}}
-          {{boundAvatar controller imageSize="large" template="uploaded_avatar_template"}} {{i18n user.change_avatar.uploaded_avatar}}
+        {{#if custom_avatar_upload_id}}
+          {{boundAvatar controller imageSize="large" uploadId="custom_avatar_upload_id"}} {{i18n user.change_avatar.uploaded_avatar}}
         {{else}}
           {{i18n user.change_avatar.uploaded_avatar_empty}}
         {{/if}}
diff --git a/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js b/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
index 0cbb2d7e2..fb9ca8c45 100644
--- a/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
+++ b/app/assets/javascripts/discourse/views/modal/avatar_selector_view.js
@@ -105,7 +105,7 @@ Discourse.AvatarSelectorView = Discourse.ModalBodyView.extend({
   }.observes('controller.use_uploaded_avatar'),
 
   uploadButtonText: function() {
-    return this.get("uploading") ? I18n.t("uploading") : I18n.t("upload");
+    return this.get("uploading") ? I18n.t("uploading") : I18n.t("user.change_avatar.upload_picture");
   }.property("uploading")
 
 });
diff --git a/app/assets/stylesheets/desktop/modal.scss b/app/assets/stylesheets/desktop/modal.scss
index fba29522d..369dd707f 100644
--- a/app/assets/stylesheets/desktop/modal.scss
+++ b/app/assets/stylesheets/desktop/modal.scss
@@ -182,3 +182,11 @@ animation: modal .25s;
     }
   }
 }
+
+.upload-options {
+  margin-left: 20px;
+  margin-top: 20px;
+}
+.uploaded-avatar {
+  margin-top: 20px;
+}
diff --git a/app/controllers/avatar_controller.rb b/app/controllers/avatar_controller.rb
new file mode 100644
index 000000000..b996299eb
--- /dev/null
+++ b/app/controllers/avatar_controller.rb
@@ -0,0 +1,46 @@
+require_dependency 'letter_avatar'
+class AvatarController < ApplicationController
+
+  skip_before_filter :check_xhr, :verify_authenticity_token
+
+  def show
+    username = params[:username].to_s
+    raise Discourse::NotFound unless user = User.find_by(username_lower: username.downcase)
+
+    size = params[:size].to_i
+    if size > 1000 || size < 1
+      raise Discourse::NotFound
+    end
+
+    image = nil
+    version = params[:version].to_i
+
+    raise Discourse::NotFound unless version > 0 && user_avatar = user.user_avatar
+
+    upload = version if user_avatar.contains_upload?(version)
+    upload ||= user.uploaded_avatar if user.uploaded_avatar_id == version
+
+    if user.uploaded_avatar && !upload
+      return redirect_to "/avatar/#{user.username_lower}/#{size}/#{user.uploaded_avatar_id}.png"
+    elsif upload
+      # TODO broken with S3 (should retrun a permanent redirect)
+      original = Discourse.store.path_for(user.uploaded_avatar)
+      if File.exists?(original)
+        optimized = OptimizedImage.create_for(
+          user.uploaded_avatar,
+          size,
+          size,
+          allow_animation: SiteSetting.allow_animated_avatars
+        )
+        image = Discourse.store.path_for(optimized)
+      end
+    end
+
+    if image
+      expires_in 1.year, public: true
+      send_file image, disposition: nil
+    else
+      raise Discourse::NotFound
+    end
+  end
+end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 33d9dcc47..f9cf01ae8 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -422,8 +422,6 @@ class UsersController < ApplicationController
 
     def upload_avatar_for(user, upload)
       user.upload_avatar(upload)
-      Jobs.enqueue(:generate_avatars, user_id: user.id, upload_id: upload.id)
-
       render json: { url: upload.url, width: upload.width, height: upload.height }
     end
 
diff --git a/app/jobs/regular/create_missing_avatars.rb b/app/jobs/regular/create_missing_avatars.rb
new file mode 100644
index 000000000..e81429286
--- /dev/null
+++ b/app/jobs/regular/create_missing_avatars.rb
@@ -0,0 +1,10 @@
+module Jobs
+  class CreateMissingAvatars < Jobs::Base
+    def execute(args)
+      User.find_each do |u|
+        u.refresh_avatar
+        u.save
+      end
+    end
+  end
+end
diff --git a/app/jobs/regular/generate_avatars.rb b/app/jobs/regular/generate_avatars.rb
deleted file mode 100644
index 475adf3d3..000000000
--- a/app/jobs/regular/generate_avatars.rb
+++ /dev/null
@@ -1,67 +0,0 @@
-require "image_sorcery"
-
-module Jobs
-
-  class GenerateAvatars < Jobs::Base
-
-    def execute(args)
-      raise Discourse::ImageMagickMissing.new unless system("command -v convert >/dev/null;")
-
-      upload_id, user_id = args[:upload_id], args[:user_id]
-      raise Discourse::InvalidParameters.new(:upload_id) if upload_id.blank?
-      raise Discourse::InvalidParameters.new(:user_id) if user_id.blank?
-
-      upload = Upload.find_by(id: upload_id)
-      user = User.find_by(id: user_id)
-      return if upload.nil? || user.nil?
-
-      external_copy = Discourse.store.download(upload) if Discourse.store.external?
-      original_path = if Discourse.store.external?
-        external_copy.path
-      else
-        Discourse.store.path_for(upload)
-      end
-
-      source = original_path
-      # extract the first frame when it's a gif
-      source << "[0]" unless SiteSetting.allow_animated_avatars
-      image = ImageSorcery.new(source)
-      extension = File.extname(original_path)
-
-      [120, 45, 32, 25, 20].each do |s|
-        # handle retina too
-        [s, s * 2].each do |size|
-          begin
-            # create a temp file with the same extension as the original
-            temp_file = Tempfile.new(["discourse-avatar", extension])
-            # create a transparent centered square thumbnail
-            if image.convert(temp_file.path,
-                             gravity: "center",
-                             thumbnail: "#{size}x#{size}^",
-                             extent: "#{size}x#{size}",
-                             background: "transparent")
-              if Discourse.store.store_avatar(temp_file, upload, size).blank?
-                Rails.logger.error("Failed to store avatar #{size} for #{upload.url} from #{source}")
-              end
-            else
-              Rails.logger.error("Failed to create avatar #{size} for #{upload.url} from #{source}")
-            end
-          ensure
-            # close && remove temp file
-            temp_file && temp_file.close!
-          end
-        end
-      end
-
-      # make sure we remove the cached copy from external stores
-      external_copy.close! if Discourse.store.external?
-
-      # attach the avatar to the user
-      user.uploaded_avatar_template = Discourse.store.avatar_template(upload)
-      user.save!
-
-    end
-
-  end
-
-end
diff --git a/app/jobs/scheduled/detect_avatars.rb b/app/jobs/scheduled/detect_avatars.rb
deleted file mode 100644
index b3034b49a..000000000
--- a/app/jobs/scheduled/detect_avatars.rb
+++ /dev/null
@@ -1,31 +0,0 @@
-require_dependency 'avatar_detector'
-
-module Jobs
-
-  class DetectAvatars < Jobs::Scheduled
-    every 8.hours
-
-    def execute(args)
-      return unless SiteSetting.detect_custom_avatars?
-
-      # Find a random sampling of users of trust level 1 or higher who don't have a custom avatar.
-      user_stats = UserStat.where('user_stats.has_custom_avatar = false AND users.trust_level > 0')
-                           .references(:user)
-                           .includes(:user)
-                           .order("random()")
-                           .limit(SiteSetting.max_daily_gravatar_crawls)
-
-      if user_stats.present?
-        user_stats.each do |us|
-          us.update_column(:has_custom_avatar, true) if AvatarDetector.new(us.user).has_custom_avatar?
-          UserHistory.create!(
-            action: UserHistory.actions[:checked_for_custom_avatar],
-            target_user_id: us.user_id
-          )
-        end
-      end
-    end
-
-  end
-
-end
diff --git a/app/models/user.rb b/app/models/user.rb
index 82ac98024..51b6f33ae 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -33,6 +33,7 @@ class User < ActiveRecord::Base
   has_many :topic_links, dependent: :destroy
   has_many :uploads
 
+  has_one :user_avatar, dependent: :destroy
   has_one :facebook_user_info, dependent: :destroy
   has_one :twitter_user_info, dependent: :destroy
   has_one :github_user_info, dependent: :destroy
@@ -49,7 +50,7 @@ class User < ActiveRecord::Base
   has_one :user_search_data, dependent: :destroy
   has_one :api_key, dependent: :destroy
 
-  belongs_to :uploaded_avatar, class_name: 'Upload', dependent: :destroy
+  belongs_to :uploaded_avatar, class_name: 'Upload'
 
   delegate :last_sent_email_address, :to => :email_logs
 
@@ -72,6 +73,7 @@ class User < ActiveRecord::Base
 
   after_create :create_email_token
   after_create :create_user_stat
+  after_save :refresh_avatar
 
   before_destroy do
     # These tables don't have primary keys, so destroying them with activerecord is tricky:
@@ -336,25 +338,27 @@ class User < ActiveRecord::Base
     "//www.gravatar.com/avatar/#{email_hash}.png?s={size}&r=pg&d=identicon"
   end
 
+
   # Don't pass this up to the client - it's meant for server side use
   # This is used in
   #   - self oneboxes in open graph data
   #   - emails
   def small_avatar_url
-    template = avatar_template
-    schemaless template.gsub("{size}", "45")
+    avatar_template_url.gsub("{size}", "45")
   end
 
-  # the avatars might take a while to generate
-  # so return the url of the original image in the meantime
-  def uploaded_avatar_path
-    return unless SiteSetting.allow_uploaded_avatars? && use_uploaded_avatar
-    avatar_template = uploaded_avatar_template.present? ? uploaded_avatar_template : uploaded_avatar.try(:url)
+  def avatar_template_url
     schemaless absolute avatar_template
   end
 
+  def self.avatar_template(username,uploaded_avatar_id)
+    id = uploaded_avatar_id || -1
+    username ||= ""
+    "/avatar/#{username.downcase}/{size}/#{id}.png"
+  end
+
   def avatar_template
-    uploaded_avatar_path || User.gravatar_template(id != -1 ? email : "team@discourse.org")
+    self.class.avatar_template(username,uploaded_avatar_id)
   end
 
   # The following count methods are somewhat slow - definitely don't use them in a loop.
@@ -616,6 +620,20 @@ class User < ActiveRecord::Base
     Jobs.enqueue_in(delay / 2, :update_top_redirection, user_id: self.id, redirected_at: Time.zone.now)
   end
 
+  def refresh_avatar
+    avatar = user_avatar || UserAvatar.create!(user_id: id)
+
+    if SiteSetting.automatically_download_gravatars?
+      avatar.update_gravatar! unless avatar.last_gravatar_download_attempt
+    end
+
+    if SiteSetting.enable_system_avatars?
+      avatar.update_system_avatar! if !avatar.system_upload_id || username_changed?
+    end
+
+    self.uploaded_avatar_id = (avatar.gravatar_upload_id || avatar.system_upload_id) unless uploaded_avatar_id
+  end
+
   protected
 
   def cook
@@ -778,7 +796,6 @@ end
 #  primary_group_id              :integer
 #  locale                        :string(10)
 #  profile_background            :string(255)
-#  email_hash                    :string(255)
 #  registration_ip_address       :inet
 #  last_redirected_to_top_at     :datetime
 #
diff --git a/app/models/user_action.rb b/app/models/user_action.rb
index 8752ce392..85dcd7223 100644
--- a/app/models/user_action.rb
+++ b/app/models/user_action.rb
@@ -109,9 +109,9 @@ SELECT
   coalesce(p.post_number, 1) post_number,
   p.reply_to_post_number,
   pu.email, pu.username, pu.name, pu.id user_id,
-  pu.use_uploaded_avatar, pu.uploaded_avatar_template, pu.uploaded_avatar_id,
+  pu.uploaded_avatar_id,
   u.email acting_email, u.username acting_username, u.name acting_name, u.id acting_user_id,
-  u.use_uploaded_avatar acting_use_uploaded_avatar, u.uploaded_avatar_template acting_uploaded_avatar_template, u.uploaded_avatar_id acting_uploaded_avatar_id,
+  u.uploaded_avatar_id acting_uploaded_avatar_id,
   coalesce(p.cooked, p2.cooked) cooked,
   CASE WHEN coalesce(p.deleted_at, p2.deleted_at, t.deleted_at) IS NULL THEN false ELSE true END deleted,
   p.hidden,
diff --git a/app/models/user_avatar.rb b/app/models/user_avatar.rb
new file mode 100644
index 000000000..401ea3c3c
--- /dev/null
+++ b/app/models/user_avatar.rb
@@ -0,0 +1,53 @@
+require_dependency 'letter_avatar'
+
+class UserAvatar < ActiveRecord::Base
+  MAX_SIZE = 240
+
+  belongs_to :user
+  belongs_to :system_upload, class_name: 'Upload', dependent: :destroy
+  belongs_to :gravatar_upload, class_name: 'Upload', dependent: :destroy
+  belongs_to :custom_upload, class_name: 'Upload', dependent: :destroy
+
+  def contains_upload?(id)
+    system_upload_id == id || gravatar_upload_id == id || custom_upload_id == id
+  end
+
+  # updates the letter based avatar
+  def update_system_avatar!
+    system_upload.destroy! if system_upload
+    file = File.open(LetterAvatar.generate(user.username, MAX_SIZE), "r")
+    self.system_upload = Upload.create_for(user_id, file, "avatar.png", file.size)
+    save!
+  end
+
+  def update_gravatar!
+    self.last_gravatar_download_attempt = Time.new
+    gravatar_url = "http://www.gravatar.com/avatar/#{user.email_hash}.png?s=500&d=404"
+    tempfile = FileHelper.download(gravatar_url, 1.megabyte, "gravatar")
+
+    upload = Upload.create_for(user.id, tempfile, 'gravatar.png', File.size(tempfile.path))
+
+    gravatar_upload.destroy! if gravatar_upload
+    self.gravatar_upload = upload
+    save!
+  rescue OpenURI::HTTPError
+    save!
+  ensure
+    tempfile.unlink if tempfile
+  end
+
+end
+
+# == Schema Information
+#
+# Table name: user_avatars
+#
+#  id                             :integer          not null, primary key
+#  user_id                        :integer          not null
+#  system_upload_id               :integer
+#  custom_upload_id               :integer
+#  gravatar_upload_id             :integer
+#  last_gravatar_download_attempt :datetime
+#  created_at                     :datetime
+#  updated_at                     :datetime
+#
diff --git a/app/models/user_stat.rb b/app/models/user_stat.rb
index 094043205..cfa3f3a7c 100644
--- a/app/models/user_stat.rb
+++ b/app/models/user_stat.rb
@@ -85,7 +85,6 @@ end
 # Table name: user_stats
 #
 #  user_id           :integer          not null, primary key
-#  has_custom_avatar :boolean          default(FALSE), not null
 #  topics_entered    :integer          default(0), not null
 #  time_read         :integer          default(0), not null
 #  days_visited      :integer          default(0), not null
diff --git a/app/serializers/basic_post_serializer.rb b/app/serializers/basic_post_serializer.rb
index 8f8727116..22a860009 100644
--- a/app/serializers/basic_post_serializer.rb
+++ b/app/serializers/basic_post_serializer.rb
@@ -4,6 +4,7 @@ class BasicPostSerializer < ApplicationSerializer
              :name,
              :username,
              :avatar_template,
+             :uploaded_avatar_id,
              :created_at,
              :cooked
 
@@ -19,6 +20,10 @@ class BasicPostSerializer < ApplicationSerializer
     object.user.try(:avatar_template)
   end
 
+  def uploaded_avatar_id
+    object.user.try(:uploaded_avatar_id)
+  end
+
   def cooked
     if object.hidden && !scope.is_staff?
       if scope.current_user && object.user_id == scope.current_user.id
diff --git a/app/serializers/basic_user_serializer.rb b/app/serializers/basic_user_serializer.rb
index db8f7d02d..e46180c4c 100644
--- a/app/serializers/basic_user_serializer.rb
+++ b/app/serializers/basic_user_serializer.rb
@@ -1,7 +1,26 @@
 class BasicUserSerializer < ApplicationSerializer
-  attributes :id, :username, :avatar_template
+  attributes :id, :username, :uploaded_avatar_id, :avatar_template
 
   def include_name?
     SiteSetting.enable_names?
   end
+
+  # so weird we send a hash in here sometimes and an object others
+  def include_uploaded_avatar_id?
+    SiteSetting.allow_uploaded_avatars? &&
+      (Hash === object ? user[:uploaded_avatar_id] : object.uploaded_avatar_id)
+  end
+
+  def avatar_template
+    if Hash === object
+      User.avatar_template(user[:username], user[:uploaded_avatar_id])
+    else
+      object.avatar_template
+    end
+  end
+
+  def user
+    object[:user] || object
+  end
+
 end
diff --git a/app/serializers/post_serializer.rb b/app/serializers/post_serializer.rb
index d26e26987..7ddadfb2c 100644
--- a/app/serializers/post_serializer.rb
+++ b/app/serializers/post_serializer.rb
@@ -127,7 +127,8 @@ class PostSerializer < BasicPostSerializer
   def reply_to_user
     {
       username: object.reply_to_user.username,
-      avatar_template: object.reply_to_user.avatar_template
+      avatar_template: object.reply_to_user.avatar_template,
+      uploaded_avatar_id: object.reply_to_user.uploaded_avatar_id
     }
   end
 
diff --git a/app/serializers/topic_post_count_serializer.rb b/app/serializers/topic_post_count_serializer.rb
index 836ae78bf..f720cd114 100644
--- a/app/serializers/topic_post_count_serializer.rb
+++ b/app/serializers/topic_post_count_serializer.rb
@@ -10,13 +10,15 @@ class TopicPostCountSerializer < BasicUserSerializer
     object[:user].username
   end
 
-  def avatar_template
-    object[:user].avatar_template
-  end
-
   def post_count
     object[:post_count]
   end
 
+  def uploaded_avatar_id
+    object[:user].uploaded_avatar_id
+  end
 
+  def include_uploaded_avatar_id?
+    SiteSetting.allow_uploaded_avatars? && object[:user].use_uploaded_avatar
+  end
 end
diff --git a/app/serializers/user_action_serializer.rb b/app/serializers/user_action_serializer.rb
index e5355649b..35d4f5d8c 100644
--- a/app/serializers/user_action_serializer.rb
+++ b/app/serializers/user_action_serializer.rb
@@ -23,30 +23,20 @@ class UserActionSerializer < ApplicationSerializer
              :hidden,
              :moderator_action,
              :edit_reason,
-             :category_id
+             :category_id,
+             :uploaded_avatar_id,
+             :acting_uploaded_avatar_id
 
   def excerpt
     PrettyText.excerpt(object.cooked, 300) if object.cooked
   end
 
   def avatar_template
-    avatar_for(
-      object.user_id,
-      object.email,
-      object.use_uploaded_avatar,
-      object.uploaded_avatar_template,
-      object.uploaded_avatar_id
-    )
+    User.avatar_template(object.username, object.uploaded_avatar_id)
   end
 
   def acting_avatar_template
-    avatar_for(
-      object.acting_user_id,
-      object.acting_email,
-      object.acting_use_uploaded_avatar,
-      object.acting_uploaded_avatar_template,
-      object.acting_uploaded_avatar_id
-    )
+    User.avatar_template(object.acting_username, object.acting_uploaded_avatar_id)
   end
 
   def include_name?
diff --git a/app/serializers/user_serializer.rb b/app/serializers/user_serializer.rb
index ceafb8fa8..93e80c6e0 100644
--- a/app/serializers/user_serializer.rb
+++ b/app/serializers/user_serializer.rb
@@ -63,16 +63,27 @@ class UserSerializer < BasicUserSerializer
                      :external_links_in_new_tab,
                      :dynamic_favicon,
                      :enable_quoting,
-                     :use_uploaded_avatar,
-                     :has_uploaded_avatar,
-                     :gravatar_template,
-                     :uploaded_avatar_template,
                      :muted_category_ids,
                      :tracked_category_ids,
                      :watched_category_ids,
                      :private_messages_stats,
-                     :disable_jump_reply
+                     :disable_jump_reply,
+                     :system_avatar_upload_id,
+                     :gravatar_avatar_upload_id,
+                     :custom_avatar_upload_id,
+                     :uploaded_avatar_id
 
+  def system_avatar_upload_id
+    object.user_avatar.try(:system_upload_id)
+  end
+
+  def gravatar_avatar_upload_id
+    object.user_avatar.try(:gravatar_upload_id)
+  end
+
+  def custom_avatar_upload_id
+    object.user_avatar.try(:custom_upload_id)
+  end
 
   def auto_track_topics_after_msecs
     object.auto_track_topics_after_msecs || SiteSetting.auto_track_topics_after
@@ -106,10 +117,6 @@ class UserSerializer < BasicUserSerializer
     UserAction.stats(object.id, scope)
   end
 
-  def gravatar_template
-    User.gravatar_template(object.email)
-  end
-
   def include_suspended?
     object.suspended?
   end
diff --git a/config/initializers/06-mini_profiler.rb b/config/initializers/06-mini_profiler.rb
index d3158f068..0b0ddfe95 100644
--- a/config/initializers/06-mini_profiler.rb
+++ b/config/initializers/06-mini_profiler.rb
@@ -22,6 +22,7 @@ if defined?(Rack::MiniProfiler)
     (path !~ /^\/message-bus/) &&
     (path !~ /topics\/timings/) &&
     (path !~ /assets/) &&
+    (path !~ /\/avatar\//) &&
     (path !~ /qunit/) &&
     (path !~ /srv\/status/) &&
     (path !~ /commits-widget/) &&
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index f5521e147..ae4db388e 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -307,10 +307,12 @@ en:
       change_avatar:
         title: "Change your avatar"
         gravatar: "<a href='//gravatar.com/emails' target='_blank'>Gravatar</a>, based on"
-        gravatar_title: "Change your avatar on Gravatar's website"
+        refresh_gravatar_title: "Refresh your Gravatar"
+        letter_based: "System assigned avatar"
         uploaded_avatar: "Custom picture"
         uploaded_avatar_empty: "Add a custom picture"
         upload_title: "Upload your picture"
+        upload_picture: "Upload Picture"
         image_is_not_a_square: "Warning: we've cropped your image; it is not square."
 
       change_profile_background:
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 83fce07b9..f6f3808f5 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -863,6 +863,7 @@ en:
 
     allow_uploaded_avatars: "Allow users to upload their custom avatars"
     allow_animated_avatars: "Allow users to use animated gif for avatars. WARNING: it is highly recommended to run the avatars:regenerate rake task after changing that setting."
+    automatically_download_gravatars: "Download gravatars for users upon account creation or email change"
     digest_topics: "The maximum amount of topics to display in an email digest"
     digest_min_excerpt_length: "How many characters we're aiming for for each post in the email digest"
     default_digest_email_frequency: "How often users receive digest emails by default. They can change this setting in their preferences."
diff --git a/config/routes.rb b/config/routes.rb
index 47b6939a7..af88c444f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -366,6 +366,8 @@ Discourse::Application.routes.draw do
   post "draft" => "draft#update"
   delete "draft" => "draft#destroy"
 
+  get "avatar/:username/:size/:version.png" => "avatar#show", format: false
+
   get "cdn_asset/:site/*path" => "static#cdn_asset", format: false
 
   get "robots.txt" => "robots_txt#index"
diff --git a/config/site_settings.yml b/config/site_settings.yml
index 3467d6b2d..0506b18a5 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -329,14 +329,13 @@ files:
   allow_profile_backgrounds:
     client: true
     default: true
+  automatically_download_gravatars: true
   allow_uploaded_avatars:
     client: true
     default: true
   allow_animated_avatars:
     client: true
     default: false
-  detect_custom_avatars: true
-  max_daily_gravatar_crawls: 500
 
 trust:
   default_trust_level: 0
@@ -547,7 +546,11 @@ uncategorized:
     default: ''
 
   enable_cdn_js_debugging: true
+
   show_create_topics_notice:
     client: true
     default: true
 
+  enable_system_avatars:
+    hidden: true
+    default: true
diff --git a/db/fixtures/005_users.rb b/db/fixtures/005_users.rb
index 5ba7bfe93..dda16fe7f 100644
--- a/db/fixtures/005_users.rb
+++ b/db/fixtures/005_users.rb
@@ -23,3 +23,8 @@ User.seed do |u|
   u.email_private_messages = false
   u.trust_level = TrustLevel.levels[:elder]
 end
+
+# download avatars for existing users
+if UserAvatar.count < User.count
+  Jobs.enqueue(:create_missing_avatars)
+end
diff --git a/db/migrate/20140520063859_remove_has_custom_avatar_from_user_stats.rb b/db/migrate/20140520063859_remove_has_custom_avatar_from_user_stats.rb
new file mode 100644
index 000000000..66bcb15f9
--- /dev/null
+++ b/db/migrate/20140520063859_remove_has_custom_avatar_from_user_stats.rb
@@ -0,0 +1,5 @@
+class RemoveHasCustomAvatarFromUserStats < ActiveRecord::Migration
+  def change
+    remove_column :user_stats, :has_custom_avatar
+  end
+end
diff --git a/db/migrate/20140522003151_add_user_avatars.rb b/db/migrate/20140522003151_add_user_avatars.rb
new file mode 100644
index 000000000..8632d912e
--- /dev/null
+++ b/db/migrate/20140522003151_add_user_avatars.rb
@@ -0,0 +1,12 @@
+class AddUserAvatars < ActiveRecord::Migration
+  def change
+    create_table :user_avatars do |t|
+      t.integer :user_id, null: false
+      t.integer :system_upload_id
+      t.integer :custom_upload_id
+      t.integer :gravatar_upload_id
+      t.datetime :last_gravatar_download_attempt
+      t.timestamps
+    end
+  end
+end
diff --git a/lib/avatar_detector.rb b/lib/avatar_detector.rb
deleted file mode 100644
index 4841e96ef..000000000
--- a/lib/avatar_detector.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-require_dependency 'user'
-require 'net/http'
-
-class AvatarDetector
-
-  def initialize(user)
-    raise "Tried to detect an avatar on a non-user instance" unless user && user.is_a?(User)
-
-    @user = user
-  end
-
-  def has_custom_avatar?
-    return true if @user.uploaded_avatar_path
-    has_custom_gravatar?
-  end
-
-  # Check whether the user has a gravatar by performing a HTTP HEAD request to
-  # Gravatar using the `d=404` parameter.
-  def has_custom_gravatar?
-    result = Net::HTTP.start('www.gravatar.com') do |http|
-      http.open_timeout = 2
-      http.read_timeout = 2
-      http.head("/avatar/#{User.email_hash(@user.email)}?d=404")
-    end
-
-    return result.code.to_i == 200
-  rescue
-    # If the HTTP request fails, assume no gravatar
-    false
-  end
-
-end
diff --git a/lib/avatar_lookup.rb b/lib/avatar_lookup.rb
index 147c4fe06..b1fc1c616 100644
--- a/lib/avatar_lookup.rb
+++ b/lib/avatar_lookup.rb
@@ -15,8 +15,6 @@ class AvatarLookup
     @lookup_columns ||= [:id,
                          :email,
                          :username,
-                         :use_uploaded_avatar,
-                         :uploaded_avatar_template,
                          :uploaded_avatar_id]
   end
 
diff --git a/lib/composer_messages_finder.rb b/lib/composer_messages_finder.rb
index 99d30a41b..228f2801f 100644
--- a/lib/composer_messages_finder.rb
+++ b/lib/composer_messages_finder.rb
@@ -47,7 +47,7 @@ class ComposerMessagesFinder
     return unless @user.has_trust_level?(:basic)
 
     # We don't notify users who have avatars or who have been notified already.
-    return if @user.user_stat.has_custom_avatar? || UserHistory.exists_for_user?(@user, :notified_about_avatar)
+    return if @user.uploaded_avatar_id || UserHistory.exists_for_user?(@user, :notified_about_avatar)
 
     # Finally, we don't check users whose avatars haven't been examined
     return unless UserHistory.exists_for_user?(@user, :checked_for_custom_avatar)
diff --git a/lib/letter_avatar.rb b/lib/letter_avatar.rb
new file mode 100644
index 000000000..7bf341975
--- /dev/null
+++ b/lib/letter_avatar.rb
@@ -0,0 +1,303 @@
+class LetterAvatar
+  class<<self
+
+    FULLSIZE = 240
+
+    def cache_path
+      'tmp/letter_avatars'
+    end
+
+    def generate(username, size)
+
+      size = FULLSIZE if size > FULLSIZE
+      filename = cached_path(username, size)
+
+      if File.exists?(filename)
+        return filename
+      end
+
+      fullsize = fullsize_path(username)
+      if !File.exists?(fullsize)
+        generate_fullsize(username)
+      end
+
+      resize(fullsize, filename, size)
+    end
+
+    def cached_path(username, size)
+      dir = "#{cache_path}/#{username}"
+      FileUtils.mkdir_p(dir)
+
+      "#{dir}/#{size}.png"
+    end
+
+    def fullsize_path(username)
+      cached_path(username, FULLSIZE)
+    end
+
+    def resize(from, to, size)
+      `convert #{from} -resize #{size}x#{size} #{to}`
+      to
+    end
+
+    def generate_fullsize(username)
+
+      filename = fullsize_path(username)
+      color = colors[Digest::MD5.hexdigest(username)[0...15].to_i(16) % 216]
+      stroke = darken(color, 0.8)
+
+      instructions = %W{
+        -size 240x240
+        xc:#{to_rgb(color)}
+        -pointsize 240
+        -fill white
+        -gravity Center
+        -font 'Helvetica-Bold'
+        -stroke #{to_rgb(stroke)}
+        -strokewidth 2
+        -annotate -5+25 '#{username[0].upcase}'
+        '#{filename}'
+      }
+
+      `convert #{instructions.join(" ")}`
+
+      filename
+    end
+
+    def darken(color,pct)
+      color.map do |n|
+        (n.to_f * pct).to_i
+      end
+    end
+
+    def to_rgb(color)
+      r,g,b = color
+      "'rgb(#{r},#{g},#{b})'"
+    end
+
+    # palette of 216 optimally disctinct colors
+    # cf. http://tools.medialab.sciences-po.fr/iwanthue/index.php
+    # parameters used:
+    #   - H: 0 - 360
+    #   - C: 0 - 2
+    #   - L: 0.75 - 1.5
+    def colors
+       [[198,125,40],
+        [61,155,243],
+        [74,243,75],
+        [238,89,166],
+        [52,240,224],
+        [177,156,155],
+        [247,242,53],
+        [111,154,78],
+        [237,179,245],
+        [237,101,95],
+        [89,239,155],
+        [242,233,158],
+        [163,212,245],
+        [65,152,142],
+        [165,135,246],
+        [181,166,38],
+        [187,229,206],
+        [77,164,25],
+        [179,246,101],
+        [234,93,37],
+        [225,155,115],
+        [142,140,188],
+        [223,120,140],
+        [249,174,27],
+        [244,117,225],
+        [137,141,102],
+        [75,191,146],
+        [188,239,142],
+        [164,199,145],
+        [173,120,149],
+        [59,195,89],
+        [222,198,220],
+        [68,145,187],
+        [236,204,179],
+        [159,195,72],
+        [188,121,189],
+        [166,160,85],
+        [181,233,37],
+        [236,177,85],
+        [121,147,160],
+        [234,218,110],
+        [241,157,191],
+        [62,200,234],
+        [133,243,34],
+        [88,149,110],
+        [226,235,237],
+        [183,119,118],
+        [192,247,192],
+        [113,196,122],
+        [197,115,70],
+        [80,175,187],
+        [103,231,238],
+        [240,72,133],
+        [228,149,241],
+        [180,188,159],
+        [172,132,85],
+        [221,236,102],
+        [236,194,58],
+        [217,176,109],
+        [88,244,199],
+        [186,157,239],
+        [113,230,96],
+        [206,115,165],
+        [244,178,163],
+        [230,139,26],
+        [241,125,89],
+        [83,160,66],
+        [107,190,166],
+        [197,161,210],
+        [198,203,245],
+        [238,117,19],
+        [228,119,116],
+        [131,156,41],
+        [145,178,168],
+        [139,170,220],
+        [233,95,125],
+        [87,178,230],
+        [157,200,119],
+        [237,140,76],
+        [229,185,186],
+        [144,206,212],
+        [236,209,158],
+        [185,189,79],
+        [34,208,66],
+        [84,238,129],
+        [133,140,134],
+        [219,229,175],
+        [168,179,25],
+        [140,145,240],
+        [151,241,125],
+        [67,162,107],
+        [200,156,21],
+        [169,173,189],
+        [226,116,189],
+        [133,231,191],
+        [194,161,63],
+        [241,77,99],
+        [241,217,53],
+        [123,204,105],
+        [210,201,119],
+        [229,108,155],
+        [240,91,72],
+        [187,115,210],
+        [240,163,100],
+        [178,217,57],
+        [179,135,116],
+        [204,211,24],
+        [186,135,57],
+        [223,176,135],
+        [204,148,151],
+        [116,223,50],
+        [95,195,46],
+        [123,160,236],
+        [181,172,131],
+        [142,220,202],
+        [240,140,112],
+        [172,145,164],
+        [228,124,45],
+        [222,234,142],
+        [42,205,125],
+        [192,233,116],
+        [119,170,114],
+        [158,138,26],
+        [73,190,183],
+        [185,229,243],
+        [227,107,55],
+        [196,205,202],
+        [132,143,60],
+        [233,192,237],
+        [62,150,220],
+        [205,201,141],
+        [106,140,190],
+        [161,131,205],
+        [226,226,75],
+        [198,139,81],
+        [115,171,32],
+        [101,181,67],
+        [149,137,119],
+        [222,245,86],
+        [183,130,175],
+        [168,125,133],
+        [124,142,87],
+        [236,156,171],
+        [232,194,91],
+        [219,200,69],
+        [144,219,34],
+        [219,95,187],
+        [145,154,217],
+        [165,185,100],
+        [127,238,163],
+        [224,178,198],
+        [119,153,120],
+        [124,212,92],
+        [172,161,105],
+        [231,155,135],
+        [157,132,101],
+        [122,185,146],
+        [53,166,51],
+        [70,163,90],
+        [150,190,213],
+        [234,235,219],
+        [166,152,185],
+        [159,194,159],
+        [222,242,47],
+        [202,176,161],
+        [95,140,229],
+        [156,246,80],
+        [93,170,203],
+        [159,142,54],
+        [185,237,230],
+        [94,150,149],
+        [187,206,136],
+        [157,224,166],
+        [235,158,208],
+        [109,232,216],
+        [141,201,87],
+        [208,124,118],
+        [142,125,214],
+        [226,234,123],
+        [72,219,41],
+        [234,102,111],
+        [168,142,79],
+        [188,135,35],
+        [214,233,195],
+        [148,173,116],
+        [223,112,95],
+        [228,128,236],
+        [206,114,54],
+        [195,119,88],
+        [235,140,94],
+        [235,202,125],
+        [233,155,153],
+        [214,214,238],
+        [246,200,35],
+        [151,125,171],
+        [132,145,172],
+        [131,142,118],
+        [199,126,150],
+        [61,162,123],
+        [58,176,151],
+        [215,141,69],
+        [225,154,220],
+        [224,244,174],
+        [233,161,64],
+        [130,221,137],
+        [81,191,129],
+        [169,162,140],
+        [174,177,222],
+        [236,174,47],
+        [196,240,159],
+        [69,222,172],
+        [71,232,93],
+        [118,211,238],
+        [157,224,83],
+        [218,105,73],
+        [165,241,221]]
+    end
+  end
+end
diff --git a/lib/tasks/avatars.rake b/lib/tasks/avatars.rake
deleted file mode 100644
index eaf8f2dd8..000000000
--- a/lib/tasks/avatars.rake
+++ /dev/null
@@ -1,12 +0,0 @@
-desc "re-generate avatars"
-task "avatars:regenerate" => :environment do
-  RailsMultisite::ConnectionManagement.each_connection do |db|
-    puts "Generating avatars for: #{db}"
-    next unless SiteSetting.allow_uploaded_avatars
-    User.where("uploaded_avatar_id IS NOT NULL").find_each do |u|
-      Jobs.enqueue(:generate_avatars, upload_id: u.uploaded_avatar_id, user_id: u.id)
-      putc "."
-    end
-  end
-  puts "\ndone."
-end
diff --git a/spec/components/avatar_detector_spec.rb b/spec/components/avatar_detector_spec.rb
deleted file mode 100644
index d994007fa..000000000
--- a/spec/components/avatar_detector_spec.rb
+++ /dev/null
@@ -1,67 +0,0 @@
-# encoding: utf-8
-require 'spec_helper'
-require_dependency 'avatar_detector'
-
-describe AvatarDetector do
-
-  describe "construction" do
-
-    it "raises an error without a user" do
-      -> { AvatarDetector.new(nil) }.should raise_error
-    end
-
-    it "raises an error on a non-user object" do
-      -> { AvatarDetector.new(Array.new) }.should raise_error
-    end
-
-  end
-
-  describe "has_custom_avatar?" do
-
-    describe "with a user" do
-      let(:user) { User.new(use_uploaded_avatar: true) }
-      let(:avatar_detector) { AvatarDetector.new(user) }
-
-      describe "when the user doesn't have an uploaded_avatar_path" do
-
-        before do
-          user.stubs(:uploaded_avatar_path)
-        end
-
-        it "returns true if they have a custom gravatar" do
-          avatar_detector.expects(:has_custom_gravatar?).returns(true)
-          avatar_detector.has_custom_avatar?.should be_true
-        end
-
-        it "returns false if they don't have a custom gravatar" do
-          avatar_detector.expects(:has_custom_gravatar?).returns(false)
-          avatar_detector.has_custom_avatar?.should be_false
-        end
-      end
-
-
-      context "when the user doesn't have an uploaded_avatar_path" do
-        let(:user) { User.new(use_uploaded_avatar: true) }
-        let(:avatar_detector) { AvatarDetector.new(user) }
-
-        describe "when the user has an uploaded avatar" do
-          before do
-            user.expects(:uploaded_avatar_path).returns("/some/uploaded/file.png")
-          end
-
-          it "returns true" do
-            avatar_detector.has_custom_avatar?.should be_true
-          end
-
-          it "doesn't call has_custom_gravatar" do
-            avatar_detector.expects(:has_custom_gravatar?).never
-            avatar_detector.has_custom_avatar?
-          end
-
-        end
-      end
-
-    end
-  end
-
-end
\ No newline at end of file
diff --git a/spec/components/composer_messages_finder_spec.rb b/spec/components/composer_messages_finder_spec.rb
index e71e341fd..1aa107f07 100644
--- a/spec/components/composer_messages_finder_spec.rb
+++ b/spec/components/composer_messages_finder_spec.rb
@@ -112,7 +112,7 @@ describe ComposerMessagesFinder do
       end
 
       it "doesn't return notifications for users who have custom avatars" do
-        user.user_stat.has_custom_avatar = true
+        user.uploaded_avatar_id = 1
         finder.check_avatar_notification.should be_blank
       end
 
diff --git a/spec/controllers/users_controller_spec.rb b/spec/controllers/users_controller_spec.rb
index bf2edd38b..d50f7a572 100644
--- a/spec/controllers/users_controller_spec.rb
+++ b/spec/controllers/users_controller_spec.rb
@@ -1136,7 +1136,6 @@ describe UsersController do
           upload = Fabricate(:upload)
           Upload.expects(:create_for).returns(upload)
           # enqueues the user_image generator job
-          Jobs.expects(:enqueue).with(:generate_avatars, { user_id: user.id, upload_id: upload.id })
           xhr :post, :upload_user_image, username: user.username, file: user_image, user_image_type: "avatar"
           user.reload
           # erase the previous template
@@ -1194,7 +1193,6 @@ describe UsersController do
             upload = Fabricate(:upload)
             Upload.expects(:create_for).returns(upload)
             # enqueues the user_image generator job
-            Jobs.expects(:enqueue).with(:generate_avatars, { user_id: user.id, upload_id: upload.id })
             xhr :post, :upload_avatar, username: user.username, file: user_image_url, user_image_type: "avatar"
             user.reload
             # erase the previous template
diff --git a/spec/models/user_avatar_spec.rb b/spec/models/user_avatar_spec.rb
new file mode 100644
index 000000000..052a64876
--- /dev/null
+++ b/spec/models/user_avatar_spec.rb
@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+describe UserAvatar do
+  let(:avatar){
+    user = Fabricate(:user)
+    user.create_user_avatar!
+  }
+
+  it 'can generate a system avatar' do
+    avatar.update_system_avatar!
+    avatar.system_upload.should_not be_nil
+  end
+
+  it 'can update gravatars' do
+    temp = Tempfile.new('test')
+    FileHelper.expects(:download).returns(temp)
+    avatar.update_gravatar!
+    temp.unlink
+    avatar.gravatar_upload.should_not be_nil
+  end
+end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index af8cb541b..3fb80aea3 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -984,47 +984,30 @@ describe User do
 
   describe ".small_avatar_url" do
 
-    let(:user) { build(:user, use_uploaded_avatar: true, uploaded_avatar_template: "/uploaded/avatar/template/{size}.png") }
+    let(:user) { build(:user, username: 'Sam') }
 
     it "returns a 45-pixel-wide avatar" do
-      user.small_avatar_url.should == "//test.localhost/uploaded/avatar/template/45.png"
+      user.small_avatar_url.should == "//test.localhost/avatar/sam/45/-1.png"
     end
 
   end
 
-  describe ".uploaded_avatar_path" do
+  describe ".avatar_template_url" do
 
-    let(:user) { build(:user, use_uploaded_avatar: true, uploaded_avatar_template: "/uploaded/avatar/template/{size}.png") }
+    let(:user) { build(:user, uploaded_avatar_id: 99, username: 'Sam') }
 
-    it "returns nothing when uploaded avatars are not allowed" do
-      SiteSetting.expects(:allow_uploaded_avatars).returns(false)
-      user.uploaded_avatar_path.should be_nil
+    it "returns default when uploaded avatars are not allowed" do
+      SiteSetting.allow_uploaded_avatars = false
+      user.avatar_template_url.should == "//test.localhost/avatar/sam/{size}/-1.png"
     end
 
-    it "returns a schemaless avatar template" do
-      user.uploaded_avatar_path.should == "//test.localhost/uploaded/avatar/template/{size}.png"
+    it "returns a schemaless avatar template with correct id" do
+      user.avatar_template_url.should == "//test.localhost/avatar/sam/{size}/99.png"
     end
 
     it "returns a schemaless cdn-based avatar template" do
       Rails.configuration.action_controller.stubs(:asset_host).returns("http://my.cdn.com")
-      user.uploaded_avatar_path.should == "//my.cdn.com/uploaded/avatar/template/{size}.png"
-    end
-
-  end
-
-  describe ".avatar_template" do
-
-    let(:user) { build(:user, email: "em@il.com") }
-
-    it "returns the uploaded_avatar_path by default" do
-      user.expects(:uploaded_avatar_path).returns("//discourse.org/uploaded/avatar.png")
-      user.avatar_template.should == "//discourse.org/uploaded/avatar.png"
-    end
-
-    it "returns the gravatar when no avatar has been uploaded" do
-      user.expects(:uploaded_avatar_path)
-      User.expects(:gravatar_template).with(user.email).returns("//gravatar.com/avatar.png")
-      user.avatar_template.should == "//gravatar.com/avatar.png"
+      user.avatar_template_url.should == "//my.cdn.com/avatar/sam/{size}/99.png"
     end
 
   end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 793b51ad4..51861518c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -33,6 +33,9 @@ Spork.prefork do
 
   # let's not run seed_fu every test
   SeedFu.quiet = true if SeedFu.respond_to? :quiet
+
+  SiteSetting.enable_system_avatars = false
+  SiteSetting.automatically_download_gravatars = false
   SeedFu.seed
 
   RSpec.configure do |config|
@@ -79,6 +82,10 @@ Spork.prefork do
         SiteSetting.remove_override!(setting.name)
       end
 
+      # very expensive IO operations
+      SiteSetting.enable_system_avatars = false
+      SiteSetting.automatically_download_gravatars = false
+
     end
 
     class TestCurrentUserProvider < Auth::DefaultCurrentUserProvider