X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/6be39fca2fcf691285c4af64045348c42d49ee9a..c783b5c82f5242dcc274bbae00ca2af9b537d724:/app/controllers/user_controller.rb?ds=inline

diff --git a/app/controllers/user_controller.rb b/app/controllers/user_controller.rb
index e5515f727..54e2fa9c0 100644
--- a/app/controllers/user_controller.rb
+++ b/app/controllers/user_controller.rb
@@ -18,6 +18,7 @@ class UserController < ApplicationController
   around_action :api_call_handle_error, :only => [:api_read, :api_details, :api_gpx_files]
   before_action :lookup_user_by_id, :only => [:api_read]
   before_action :lookup_user_by_name, :only => [:set_status, :delete]
+  before_action :allow_thirdparty_images, :only => [:view, :account]
 
   def terms
     @legale = params[:legale] || OSM.ip_to_country(request.remote_ip) || DEFAULT_LEGALE
@@ -28,10 +29,10 @@ class UserController < ApplicationController
     else
       @title = t "user.terms.title"
 
-      if @user && @user.terms_agreed?
+      if current_user && current_user.terms_agreed?
         # Already agreed to terms, so just show settings
-        redirect_to :action => :account, :display_name => @user.display_name
-      elsif @user.nil? && session[:new_user].nil?
+        redirect_to :action => :account, :display_name => current_user.display_name
+      elsif current_user.nil? && session[:new_user].nil?
         redirect_to :action => :login, :referer => request.fullpath
       end
     end
@@ -41,52 +42,50 @@ class UserController < ApplicationController
     @title = t "user.new.title"
 
     if params[:decline]
-      if @user
-        @user.terms_seen = true
+      if current_user
+        current_user.terms_seen = true
 
-        if @user.save
-          flash[:notice] = t("user.new.terms declined", :url => t("user.new.terms declined url")).html_safe
-        end
+        flash[:notice] = t("user.new.terms declined", :url => t("user.new.terms declined url")).html_safe if current_user.save
 
         if params[:referer]
           redirect_to params[:referer]
         else
-          redirect_to :action => :account, :display_name => @user.display_name
+          redirect_to :action => :account, :display_name => current_user.display_name
         end
       else
         redirect_to t("user.terms.declined")
       end
-    elsif @user
-      unless @user.terms_agreed?
-        @user.consider_pd = params[:user][:consider_pd]
-        @user.terms_agreed = Time.now.getutc
-        @user.terms_seen = true
+    elsif current_user
+      unless current_user.terms_agreed?
+        current_user.consider_pd = params[:user][:consider_pd]
+        current_user.terms_agreed = Time.now.getutc
+        current_user.terms_seen = true
 
-        flash[:notice] = t "user.new.terms accepted" if @user.save
+        flash[:notice] = t "user.new.terms accepted" if current_user.save
       end
 
       if params[:referer]
         redirect_to params[:referer]
       else
-        redirect_to :action => :account, :display_name => @user.display_name
+        redirect_to :action => :account, :display_name => current_user.display_name
       end
     else
-      @user = session.delete(:new_user)
-
-      if check_signup_allowed(@user.email)
-        @user.data_public = true
-        @user.description = "" if @user.description.nil?
-        @user.creation_ip = request.remote_ip
-        @user.languages = http_accept_language.user_preferred_languages
-        @user.terms_agreed = Time.now.getutc
-        @user.terms_seen = true
-
-        if @user.auth_uid.nil? || @user.auth_uid.empty?
-          @user.auth_provider = nil
-          @user.auth_uid = nil
+      self.current_user = session.delete(:new_user)
+
+      if check_signup_allowed(current_user.email)
+        current_user.data_public = true
+        current_user.description = "" if current_user.description.nil?
+        current_user.creation_ip = request.remote_ip
+        current_user.languages = http_accept_language.user_preferred_languages
+        current_user.terms_agreed = Time.now.getutc
+        current_user.terms_seen = true
+
+        if current_user.auth_uid.blank?
+          current_user.auth_provider = nil
+          current_user.auth_uid = nil
         end
 
-        if @user.save
+        if current_user.save
           flash[:piwik_goal] = PIWIK["goals"]["signup"] if defined?(PIWIK)
 
           referer = welcome_path
@@ -99,17 +98,17 @@ class UserController < ApplicationController
                                        "lat" => m[2],
                                        "lon" => m[3] }.merge(editor))
             end
-          rescue
+          rescue StandardError
             # Use default
           end
 
-          if @user.status == "active"
+          if current_user.status == "active"
             session[:referer] = referer
-            successful_login(@user)
+            successful_login(current_user)
           else
-            session[:token] = @user.tokens.create.token
-            Notifier.signup_confirm(@user, @user.tokens.create(:referer => referer)).deliver_now
-            redirect_to :action => "confirm", :display_name => @user.display_name
+            session[:token] = current_user.tokens.create.token
+            Notifier.signup_confirm(current_user, current_user.tokens.create(:referer => referer)).deliver_now
+            redirect_to :action => "confirm", :display_name => current_user.display_name
           end
         else
           render :action => "new", :referer => params[:referer]
@@ -120,32 +119,36 @@ class UserController < ApplicationController
 
   def account
     @title = t "user.account.title"
-    @tokens = @user.oauth_tokens.authorized
+    @tokens = current_user.oauth_tokens.authorized
 
     if params[:user] && params[:user][:display_name] && params[:user][:description]
       if params[:user][:auth_provider].blank? ||
-         (params[:user][:auth_provider] == @user.auth_provider &&
-          params[:user][:auth_uid] == @user.auth_uid)
-        update_user(@user, params)
+         (params[:user][:auth_provider] == current_user.auth_provider &&
+          params[:user][:auth_uid] == current_user.auth_uid)
+        update_user(current_user, params)
       else
         session[:new_user_settings] = params
         redirect_to auth_url(params[:user][:auth_provider], params[:user][:auth_uid])
       end
+    elsif errors = session.delete(:user_errors)
+      errors.each do |attribute, error|
+        current_user.errors.add(attribute, error)
+      end
     end
   end
 
   def go_public
-    @user.data_public = true
-    @user.save
+    current_user.data_public = true
+    current_user.save
     flash[:notice] = t "user.go_public.flash success"
-    redirect_to :controller => "user", :action => "account", :display_name => @user.display_name
+    redirect_to :action => "account", :display_name => current_user.display_name
   end
 
   def lost_password
     @title = t "user.lost_password.title"
 
     if params[:user] && params[:user][:email]
-      user = User.visible.find_by_email(params[:user][:email])
+      user = User.visible.find_by(:email => params[:user][:email])
 
       if user.nil?
         users = User.visible.where("LOWER(email) = LOWER(?)", params[:user][:email])
@@ -168,21 +171,21 @@ class UserController < ApplicationController
     @title = t "user.reset_password.title"
 
     if params[:token]
-      token = UserToken.find_by_token(params[:token])
+      token = UserToken.find_by(:token => params[:token])
 
       if token
-        @user = token.user
+        self.current_user = token.user
 
         if params[:user]
-          @user.pass_crypt = params[:user][:pass_crypt]
-          @user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
-          @user.status = "active" if @user.status == "pending"
-          @user.email_valid = true
+          current_user.pass_crypt = params[:user][:pass_crypt]
+          current_user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
+          current_user.status = "active" if current_user.status == "pending"
+          current_user.email_valid = true
 
-          if @user.save
+          if current_user.save
             token.destroy
             flash[:notice] = t "user.reset_password.flash changed"
-            successful_login(@user)
+            successful_login(current_user)
           end
         end
       else
@@ -190,7 +193,7 @@ class UserController < ApplicationController
         redirect_to :action => "lost_password"
       end
     else
-      render :text => "", :status => :bad_request
+      head :bad_request
     end
   end
 
@@ -198,7 +201,11 @@ class UserController < ApplicationController
     @title = t "user.new.title"
     @referer = params[:referer] || session[:referer]
 
-    if @user
+    append_content_security_policy_directives(
+      :form_action => %w[accounts.google.com *.facebook.com login.live.com github.com meta.wikimedia.org]
+    )
+
+    if current_user
       # The user is logged in already, so don't show them the signup
       # page, instead send them to the home page
       if @referer
@@ -207,43 +214,45 @@ class UserController < ApplicationController
         redirect_to :controller => "site", :action => "index"
       end
     elsif params.key?(:auth_provider) && params.key?(:auth_uid)
-      @user = User.new(:email => params[:email],
-                       :email_confirmation => params[:email],
-                       :display_name => params[:nickname],
-                       :auth_provider => params[:auth_provider],
-                       :auth_uid => params[:auth_uid])
+      self.current_user = User.new(:email => params[:email],
+                                   :email_confirmation => params[:email],
+                                   :display_name => params[:nickname],
+                                   :auth_provider => params[:auth_provider],
+                                   :auth_uid => params[:auth_uid])
 
       flash.now[:notice] = render_to_string :partial => "auth_association"
     else
       check_signup_allowed
+
+      self.current_user = User.new
     end
   end
 
   def create
-    @user = User.new(user_params)
+    self.current_user = User.new(user_params)
 
-    if check_signup_allowed(@user.email)
+    if check_signup_allowed(current_user.email)
       session[:referer] = params[:referer]
 
-      @user.status = "pending"
+      current_user.status = "pending"
 
-      if @user.auth_provider.present? && @user.pass_crypt.empty?
+      if current_user.auth_provider.present? && current_user.pass_crypt.empty?
         # We are creating an account with external authentication and
         # no password was specified so create a random one
-        @user.pass_crypt = SecureRandom.base64(16)
-        @user.pass_crypt_confirmation = @user.pass_crypt
+        current_user.pass_crypt = SecureRandom.base64(16)
+        current_user.pass_crypt_confirmation = current_user.pass_crypt
       end
 
-      if @user.invalid?
+      if current_user.invalid?
         # Something is wrong with a new user, so rerender the form
         render :action => "new"
-      elsif @user.auth_provider.present?
+      elsif current_user.auth_provider.present?
         # Verify external authenticator before moving on
-        session[:new_user] = @user
-        redirect_to auth_url(@user.auth_provider, @user.auth_uid)
+        session[:new_user] = current_user
+        redirect_to auth_url(current_user.auth_provider, current_user.auth_uid)
       else
         # Save the user record
-        session[:new_user] = @user
+        session[:new_user] = current_user
         redirect_to :action => :terms
       end
     end
@@ -264,9 +273,9 @@ class UserController < ApplicationController
   def logout
     @title = t "user.logout.title"
 
-    if params[:session] == request.session_options[:id]
+    if params[:session] == session.id
       if session[:token]
-        token = UserToken.find_by_token(session[:token])
+        token = UserToken.find_by(:token => session[:token])
         token.destroy if token
         session.delete(:token)
       end
@@ -282,7 +291,7 @@ class UserController < ApplicationController
 
   def confirm
     if request.post?
-      token = UserToken.find_by_token(params[:confirm_string])
+      token = UserToken.find_by(:token => params[:confirm_string])
       if token && token.user.active?
         flash[:error] = t("user.confirm.already active")
         redirect_to :action => "login"
@@ -293,12 +302,13 @@ class UserController < ApplicationController
         user = token.user
         user.status = "active"
         user.email_valid = true
+        flash[:notice] = gravatar_status_message(user) if gravatar_enable(user)
         user.save!
         referer = token.referer
         token.destroy
 
         if session[:token]
-          token = UserToken.find_by_token(session[:token])
+          token = UserToken.find_by(:token => session[:token])
           session.delete(:token)
         else
           token = nil
@@ -316,15 +326,15 @@ class UserController < ApplicationController
         end
       end
     else
-      user = User.find_by_display_name(params[:display_name])
+      user = User.find_by(:display_name => params[:display_name])
 
       redirect_to root_path if user.nil? || user.active?
     end
   end
 
   def confirm_resend
-    user = User.find_by_display_name(params[:display_name])
-    token = UserToken.find_by_token(session[:token])
+    user = User.find_by(:display_name => params[:display_name])
+    token = UserToken.find_by(:token => session[:token])
 
     if user.nil? || token.nil? || token.user != user
       flash[:error] = t "user.confirm_resend.failure", :name => params[:display_name]
@@ -338,20 +348,25 @@ class UserController < ApplicationController
 
   def confirm_email
     if request.post?
-      token = UserToken.find_by_token(params[:confirm_string])
+      token = UserToken.find_by(:token => params[:confirm_string])
       if token && token.user.new_email?
-        @user = token.user
-        @user.email = @user.new_email
-        @user.new_email = nil
-        @user.email_valid = true
-        if @user.save
-          flash[:notice] = t "user.confirm_email.success"
+        self.current_user = token.user
+        current_user.email = current_user.new_email
+        current_user.new_email = nil
+        current_user.email_valid = true
+        gravatar_enabled = gravatar_enable(current_user)
+        if current_user.save
+          flash[:notice] = if gravatar_enabled
+                             t("user.confirm_email.success") + " " + gravatar_status_message(current_user)
+                           else
+                             t("user.confirm_email.success")
+                           end
         else
-          flash[:errors] = @user.errors
+          flash[:errors] = current_user.errors
         end
         token.destroy
-        session[:user] = @user.id
-        redirect_to :action => "account", :display_name => @user.display_name
+        session[:user] = current_user.id
+        redirect_to :action => "account", :display_name => current_user.display_name
       elsif token
         flash[:error] = t "user.confirm_email.failure"
         redirect_to :action => "account", :display_name => token.user.display_name
@@ -362,46 +377,46 @@ class UserController < ApplicationController
   end
 
   def api_read
-    if @this_user.visible?
+    if @user.visible?
       render :action => :api_read, :content_type => "text/xml"
     else
-      render :text => "", :status => :gone
+      head :gone
     end
   end
 
   def api_details
-    @this_user = @user
+    @user = current_user
     render :action => :api_read, :content_type => "text/xml"
   end
 
   def api_gpx_files
     doc = OSM::API.new.get_xml_doc
-    @user.traces.reload.each do |trace|
+    current_user.traces.reload.each do |trace|
       doc.root << trace.to_xml_node
     end
-    render :text => doc.to_s, :content_type => "text/xml"
+    render :xml => doc.to_s
   end
 
   def view
-    @this_user = User.find_by_display_name(params[:display_name])
+    @user = User.find_by(:display_name => params[:display_name])
 
-    if @this_user &&
-       (@this_user.visible? || (@user && @user.administrator?))
-      @title = @this_user.display_name
+    if @user &&
+       (@user.visible? || (current_user && current_user.administrator?))
+      @title = @user.display_name
     else
       render_unknown_user params[:display_name]
     end
   end
 
   def make_friend
-    @new_friend = User.find_by_display_name(params[:display_name])
+    @new_friend = User.find_by(:display_name => params[:display_name])
 
     if @new_friend
       if request.post?
         friend = Friend.new
-        friend.user_id = @user.id
-        friend.friend_user_id = @new_friend.id
-        if @user.is_friends_with?(@new_friend)
+        friend.befriender = current_user
+        friend.befriendee = @new_friend
+        if current_user.is_friends_with?(@new_friend)
           flash[:warning] = t "user.make_friend.already_a_friend", :name => @new_friend.display_name
         elsif friend.save
           flash[:notice] = t "user.make_friend.success", :name => @new_friend.display_name
@@ -413,7 +428,7 @@ class UserController < ApplicationController
         if params[:referer]
           redirect_to params[:referer]
         else
-          redirect_to :controller => "user", :action => "view"
+          redirect_to :action => "view"
         end
       end
     else
@@ -422,12 +437,12 @@ class UserController < ApplicationController
   end
 
   def remove_friend
-    @friend = User.find_by_display_name(params[:display_name])
+    @friend = User.find_by(:display_name => params[:display_name])
 
     if @friend
       if request.post?
-        if @user.is_friends_with?(@friend)
-          Friend.delete_all "user_id = #{@user.id} AND friend_user_id = #{@friend.id}"
+        if current_user.is_friends_with?(@friend)
+          Friend.where(:user_id => current_user.id, :friend_user_id => @friend.id).delete_all
           flash[:notice] = t "user.remove_friend.success", :name => @friend.display_name
         else
           flash[:error] = t "user.remove_friend.not_a_friend", :name => @friend.display_name
@@ -436,7 +451,7 @@ class UserController < ApplicationController
         if params[:referer]
           redirect_to params[:referer]
         else
-          redirect_to :controller => "user", :action => "view"
+          redirect_to :action => "view"
         end
       end
     else
@@ -447,16 +462,16 @@ class UserController < ApplicationController
   ##
   # sets a user's status
   def set_status
-    @this_user.status = params[:status]
-    @this_user.save
-    redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
+    @user.status = params[:status]
+    @user.save
+    redirect_to :action => "view", :display_name => params[:display_name]
   end
 
   ##
   # delete a user, marking them as deleted and removing personal data
   def delete
-    @this_user.delete
-    redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
+    @user.delete
+    redirect_to :action => "view", :display_name => params[:display_name]
   end
 
   ##
@@ -470,9 +485,11 @@ class UserController < ApplicationController
 
       redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
     else
+      @params = params.permit(:status, :ip)
+
       conditions = {}
-      conditions[:status] = params[:status] if params[:status]
-      conditions[:creation_ip] = params[:ip] if params[:ip]
+      conditions[:status] = @params[:status] if @params[:status]
+      conditions[:creation_ip] = @params[:ip] if @params[:ip]
 
       @user_pages, @users = paginate(:users,
                                      :conditions => conditions,
@@ -484,7 +501,7 @@ class UserController < ApplicationController
   ##
   # omniauth success callback
   def auth_success
-    auth_info = env["omniauth.auth"]
+    auth_info = request.env["omniauth.auth"]
 
     provider = auth_info[:provider]
     uid = auth_info[:uid]
@@ -501,44 +518,46 @@ class UserController < ApplicationController
       email_verified = false
     end
 
-    user = User.find_by_auth_provider_and_auth_uid(provider, uid)
+    if settings = session.delete(:new_user_settings)
+      current_user.auth_provider = provider
+      current_user.auth_uid = uid
 
-    if user.nil? && provider == "google"
-      openid_url = auth_info[:extra][:id_info]["openid_id"]
-      user = User.find_by_auth_provider_and_auth_uid("openid", openid_url) if openid_url
-      user.update(:auth_provider => provider, :auth_uid => uid) if user
-    end
+      update_user(current_user, settings)
 
-    if user
-      case user.status
-      when "pending" then
-        unconfirmed_login(user)
-      when "active", "confirmed" then
-        successful_login(user, env["omniauth.params"]["referer"])
-      when "suspended" then
-        failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}")
-      else
-        failed_login t("user.login.auth failure")
-      end
-    elsif settings = session.delete(:new_user_settings)
-      @user.auth_provider = provider
-      @user.auth_uid = uid
+      session[:user_errors] = current_user.errors.as_json
 
-      update_user(@user, settings)
-
-      redirect_to :action => "account", :display_name => @user.display_name
+      redirect_to :action => "account", :display_name => current_user.display_name
     elsif session[:new_user]
       session[:new_user].auth_provider = provider
       session[:new_user].auth_uid = uid
 
-      if email_verified && email == session[:new_user].email
-        session[:new_user].status = "active"
-      end
+      session[:new_user].status = "active" if email_verified && email == session[:new_user].email
 
       redirect_to :action => "terms"
     else
-      redirect_to :action => "new", :nickname => name, :email => email,
-                  :auth_provider => provider, :auth_uid => uid
+      user = User.find_by(:auth_provider => provider, :auth_uid => uid)
+
+      if user.nil? && provider == "google"
+        openid_url = auth_info[:extra][:id_info]["openid_id"]
+        user = User.find_by(:auth_provider => "openid", :auth_uid => openid_url) if openid_url
+        user.update(:auth_provider => provider, :auth_uid => uid) if user
+      end
+
+      if user
+        case user.status
+        when "pending" then
+          unconfirmed_login(user)
+        when "active", "confirmed" then
+          successful_login(user, request.env["omniauth.params"]["referer"])
+        when "suspended" then
+          failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe
+        else
+          failed_login t("user.login.auth failure")
+        end
+      else
+        redirect_to :action => "new", :nickname => name, :email => email,
+                    :auth_provider => provider, :auth_uid => uid
+      end
     end
   end
 
@@ -559,7 +578,7 @@ class UserController < ApplicationController
     elsif user = User.authenticate(:username => username, :password => password, :pending => true)
       unconfirmed_login(user)
     elsif User.authenticate(:username => username, :password => password, :suspended => true)
-      failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}"), username
+      failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe, username
     else
       failed_login t("user.login.auth failure"), username
     end
@@ -587,15 +606,15 @@ class UserController < ApplicationController
   # try and come up with the correct URL based on what the user entered
   def openid_expand_url(openid_url)
     if openid_url.nil?
-      return nil
+      nil
     elsif openid_url.match(%r{(.*)gmail.com(/?)$}) || openid_url.match(%r{(.*)googlemail.com(/?)$})
       # Special case gmail.com as it is potentially a popular OpenID
       # provider and, unlike yahoo.com, where it works automatically, Google
       # have hidden their OpenID endpoint somewhere obscure this making it
       # somewhat less user friendly.
-      return "https://www.google.com/accounts/o8/id"
+      "https://www.google.com/accounts/o8/id"
     else
-      return openid_url
+      openid_url
     end
   end
 
@@ -614,7 +633,7 @@ class UserController < ApplicationController
     # - If they were referred to the login, send them back there.
     # - Otherwise, send them to the home page.
     if REQUIRE_TERMS_SEEN && !user.terms_seen
-      redirect_to :controller => :user, :action => :terms, :referer => target
+      redirect_to :action => :terms, :referer => target
     elsif user.blocked_on_view
       redirect_to user.blocked_on_view, :referer => target
     else
@@ -705,12 +724,12 @@ class UserController < ApplicationController
 
           begin
             Notifier.email_confirm(user, user.tokens.create).deliver_now
-          rescue
+          rescue StandardError
             # Ignore errors sending email
           end
         else
-          @user.errors.set(:new_email, @user.errors.get(:email))
-          @user.errors.set(:email, [])
+          current_user.errors.add(:new_email, current_user.errors[:email])
+          current_user.errors.add(:email, [])
         end
 
         user.restore_email!
@@ -722,39 +741,37 @@ class UserController < ApplicationController
   # require that the user is a administrator, or fill out a helpful error message
   # and return them to the user page.
   def require_administrator
-    if @user && !@user.administrator?
+    if current_user && !current_user.administrator?
       flash[:error] = t("user.filter.not_an_administrator")
 
       if params[:display_name]
-        redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
+        redirect_to :action => "view", :display_name => params[:display_name]
       else
-        redirect_to :controller => "user", :action => "login", :referer => request.fullpath
+        redirect_to :action => "login", :referer => request.fullpath
       end
-    elsif !@user
-      redirect_to :controller => "user", :action => "login", :referer => request.fullpath
+    elsif !current_user
+      redirect_to :action => "login", :referer => request.fullpath
     end
   end
 
   ##
   # require that the user in the URL is the logged in user
   def require_self
-    if params[:display_name] != @user.display_name
-      render :text => "", :status => :forbidden
-    end
+    head :forbidden if params[:display_name] != current_user.display_name
   end
 
   ##
-  # ensure that there is a "this_user" instance variable
+  # ensure that there is a "user" instance variable
   def lookup_user_by_id
-    @this_user = User.find(params[:id])
+    @user = User.find(params[:id])
   end
 
   ##
-  # ensure that there is a "this_user" instance variable
+  # ensure that there is a "user" instance variable
   def lookup_user_by_name
-    @this_user = User.find_by_display_name(params[:display_name])
+    @user = User.find_by(:display_name => params[:display_name])
   rescue ActiveRecord::RecordNotFound
-    redirect_to :controller => "user", :action => "view", :display_name => params[:display_name] unless @this_user
+    redirect_to :action => "view", :display_name => params[:display_name] unless @user
   end
 
   ##
@@ -791,4 +808,27 @@ class UserController < ApplicationController
 
     !blocked
   end
+
+  ##
+  # check if this user has a gravatar and set the user pref is true
+  def gravatar_enable(user)
+    # code from example https://en.gravatar.com/site/implement/images/ruby/
+    return false if user.image.present?
+    hash = Digest::MD5.hexdigest(user.email.downcase)
+    url = "https://www.gravatar.com/avatar/#{hash}?d=404" # without d=404 we will always get an image back
+    response = OSM.http_client.get(URI.parse(url))
+    oldsetting = user.image_use_gravatar
+    user.image_use_gravatar = response.success?
+    oldsetting != user.image_use_gravatar
+  end
+
+  ##
+  # display a message about th current status of the gravatar setting
+  def gravatar_status_message(user)
+    if user.image_use_gravatar
+      t "user.account.gravatar.enabled"
+    else
+      t "user.account.gravatar.disabled"
+    end
+  end
 end