5c41a79dc84da7f336d7ed0152094571c0e0fe8a
[rails.git] / app / controllers / user_controller.rb
1 class UserController < ApplicationController
2   layout "site", :except => [:api_details]
3
4   skip_before_action :verify_authenticity_token, :only => [:api_read, :api_details, :api_gpx_files, :auth_success]
5   before_action :disable_terms_redirect, :only => [:terms, :save, :logout, :api_details]
6   before_action :authorize, :only => [:api_details, :api_gpx_files]
7   before_action :authorize_web, :except => [:api_read, :api_details, :api_gpx_files]
8   before_action :set_locale, :except => [:api_read, :api_details, :api_gpx_files]
9   before_action :require_user, :only => [:account, :go_public, :make_friend, :remove_friend]
10   before_action :require_self, :only => [:account]
11   before_action :check_database_readable, :except => [:login, :api_read, :api_details, :api_gpx_files]
12   before_action :check_database_writable, :only => [:new, :account, :confirm, :confirm_email, :lost_password, :reset_password, :go_public, :make_friend, :remove_friend]
13   before_action :check_api_readable, :only => [:api_read, :api_details, :api_gpx_files]
14   before_action :require_allow_read_prefs, :only => [:api_details]
15   before_action :require_allow_read_gpx, :only => [:api_gpx_files]
16   before_action :require_cookies, :only => [:new, :login, :confirm]
17   before_action :require_administrator, :only => [:set_status, :delete, :list]
18   around_action :api_call_handle_error, :only => [:api_read, :api_details, :api_gpx_files]
19   before_action :lookup_user_by_id, :only => [:api_read]
20   before_action :lookup_user_by_name, :only => [:set_status, :delete]
21   before_action :allow_thirdparty_images, :only => [:view, :account]
22
23   def terms
24     @legale = params[:legale] || OSM.ip_to_country(request.remote_ip) || DEFAULT_LEGALE
25     @text = OSM.legal_text_for_country(@legale)
26
27     if request.xhr?
28       render :partial => "terms"
29     else
30       @title = t "user.terms.title"
31
32       if current_user && current_user.terms_agreed?
33         # Already agreed to terms, so just show settings
34         redirect_to :action => :account, :display_name => current_user.display_name
35       elsif current_user.nil? && session[:new_user].nil?
36         redirect_to :action => :login, :referer => request.fullpath
37       end
38     end
39   end
40
41   def save
42     @title = t "user.new.title"
43
44     if params[:decline]
45       if current_user
46         current_user.terms_seen = true
47
48         if current_user.save
49           flash[:notice] = t("user.new.terms declined", :url => t("user.new.terms declined url")).html_safe
50         end
51
52         if params[:referer]
53           redirect_to params[:referer]
54         else
55           redirect_to :action => :account, :display_name => current_user.display_name
56         end
57       else
58         redirect_to t("user.terms.declined")
59       end
60     elsif current_user
61       unless current_user.terms_agreed?
62         current_user.consider_pd = params[:user][:consider_pd]
63         current_user.terms_agreed = Time.now.getutc
64         current_user.terms_seen = true
65
66         flash[:notice] = t "user.new.terms accepted" if current_user.save
67       end
68
69       if params[:referer]
70         redirect_to params[:referer]
71       else
72         redirect_to :action => :account, :display_name => current_user.display_name
73       end
74     else
75       self.current_user = session.delete(:new_user)
76
77       if check_signup_allowed(current_user.email)
78         current_user.data_public = true
79         current_user.description = "" if current_user.description.nil?
80         current_user.creation_ip = request.remote_ip
81         current_user.languages = http_accept_language.user_preferred_languages
82         current_user.terms_agreed = Time.now.getutc
83         current_user.terms_seen = true
84
85         if current_user.auth_uid.blank?
86           current_user.auth_provider = nil
87           current_user.auth_uid = nil
88         end
89
90         if current_user.save
91           flash[:piwik_goal] = PIWIK["goals"]["signup"] if defined?(PIWIK)
92
93           referer = welcome_path
94
95           begin
96             uri = URI(session[:referer])
97             %r{map=(.*)/(.*)/(.*)}.match(uri.fragment) do |m|
98               editor = Rack::Utils.parse_query(uri.query).slice("editor")
99               referer = welcome_path({ "zoom" => m[1],
100                                        "lat" => m[2],
101                                        "lon" => m[3] }.merge(editor))
102             end
103           rescue StandardError
104             # Use default
105           end
106
107           if current_user.status == "active"
108             session[:referer] = referer
109             successful_login(current_user)
110           else
111             session[:token] = current_user.tokens.create.token
112             Notifier.signup_confirm(current_user, current_user.tokens.create(:referer => referer)).deliver_now
113             redirect_to :action => "confirm", :display_name => current_user.display_name
114           end
115         else
116           render :action => "new", :referer => params[:referer]
117         end
118       end
119     end
120   end
121
122   def account
123     @title = t "user.account.title"
124     @tokens = current_user.oauth_tokens.authorized
125
126     if params[:user] && params[:user][:display_name] && params[:user][:description]
127       if params[:user][:auth_provider].blank? ||
128          (params[:user][:auth_provider] == current_user.auth_provider &&
129           params[:user][:auth_uid] == current_user.auth_uid)
130         update_user(current_user, params)
131       else
132         session[:new_user_settings] = params
133         redirect_to auth_url(params[:user][:auth_provider], params[:user][:auth_uid])
134       end
135     elsif errors = session.delete(:user_errors)
136       errors.each do |attribute, error|
137         current_user.errors.add(attribute, error)
138       end
139     end
140   end
141
142   def go_public
143     current_user.data_public = true
144     current_user.save
145     flash[:notice] = t "user.go_public.flash success"
146     redirect_to :action => "account", :display_name => current_user.display_name
147   end
148
149   def lost_password
150     @title = t "user.lost_password.title"
151
152     if params[:user] && params[:user][:email]
153       user = User.visible.find_by(:email => params[:user][:email])
154
155       if user.nil?
156         users = User.visible.where("LOWER(email) = LOWER(?)", params[:user][:email])
157
158         user = users.first if users.count == 1
159       end
160
161       if user
162         token = user.tokens.create
163         Notifier.lost_password(user, token).deliver_now
164         flash[:notice] = t "user.lost_password.notice email on way"
165         redirect_to :action => "login"
166       else
167         flash.now[:error] = t "user.lost_password.notice email cannot find"
168       end
169     end
170   end
171
172   def reset_password
173     @title = t "user.reset_password.title"
174
175     if params[:token]
176       token = UserToken.find_by(:token => params[:token])
177
178       if token
179         self.current_user = token.user
180
181         if params[:user]
182           current_user.pass_crypt = params[:user][:pass_crypt]
183           current_user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
184           current_user.status = "active" if current_user.status == "pending"
185           current_user.email_valid = true
186
187           if current_user.save
188             token.destroy
189             flash[:notice] = t "user.reset_password.flash changed"
190             successful_login(current_user)
191           end
192         end
193       else
194         flash[:error] = t "user.reset_password.flash token bad"
195         redirect_to :action => "lost_password"
196       end
197     else
198       head :bad_request
199     end
200   end
201
202   def new
203     @title = t "user.new.title"
204     @referer = params[:referer] || session[:referer]
205
206     append_content_security_policy_directives(
207       :form_action => %w[accounts.google.com *.facebook.com login.live.com github.com meta.wikimedia.org]
208     )
209
210     if current_user
211       # The user is logged in already, so don't show them the signup
212       # page, instead send them to the home page
213       if @referer
214         redirect_to @referer
215       else
216         redirect_to :controller => "site", :action => "index"
217       end
218     elsif params.key?(:auth_provider) && params.key?(:auth_uid)
219       self.current_user = User.new(:email => params[:email],
220                                    :email_confirmation => params[:email],
221                                    :display_name => params[:nickname],
222                                    :auth_provider => params[:auth_provider],
223                                    :auth_uid => params[:auth_uid])
224
225       flash.now[:notice] = render_to_string :partial => "auth_association"
226     else
227       check_signup_allowed
228
229       self.current_user = User.new
230     end
231   end
232
233   def create
234     self.current_user = User.new(user_params)
235
236     if check_signup_allowed(current_user.email)
237       session[:referer] = params[:referer]
238
239       current_user.status = "pending"
240
241       if current_user.auth_provider.present? && current_user.pass_crypt.empty?
242         # We are creating an account with external authentication and
243         # no password was specified so create a random one
244         current_user.pass_crypt = SecureRandom.base64(16)
245         current_user.pass_crypt_confirmation = current_user.pass_crypt
246       end
247
248       if current_user.invalid?
249         # Something is wrong with a new user, so rerender the form
250         render :action => "new"
251       elsif current_user.auth_provider.present?
252         # Verify external authenticator before moving on
253         session[:new_user] = current_user
254         redirect_to auth_url(current_user.auth_provider, current_user.auth_uid)
255       else
256         # Save the user record
257         session[:new_user] = current_user
258         redirect_to :action => :terms
259       end
260     end
261   end
262
263   def login
264     session[:referer] = params[:referer] if params[:referer]
265
266     if params[:username].present? && params[:password].present?
267       session[:remember_me] ||= params[:remember_me]
268       password_authentication(params[:username], params[:password])
269     elsif params[:openid_url].present?
270       session[:remember_me] ||= params[:remember_me_openid]
271       redirect_to auth_url("openid", params[:openid_url], params[:referer])
272     end
273   end
274
275   def logout
276     @title = t "user.logout.title"
277
278     if params[:session] == session.id
279       if session[:token]
280         token = UserToken.find_by(:token => session[:token])
281         token.destroy if token
282         session.delete(:token)
283       end
284       session.delete(:user)
285       session_expires_automatically
286       if params[:referer]
287         redirect_to params[:referer]
288       else
289         redirect_to :controller => "site", :action => "index"
290       end
291     end
292   end
293
294   def confirm
295     if request.post?
296       token = UserToken.find_by(:token => params[:confirm_string])
297       if token && token.user.active?
298         flash[:error] = t("user.confirm.already active")
299         redirect_to :action => "login"
300       elsif !token || token.expired?
301         flash[:error] = t("user.confirm.unknown token")
302         redirect_to :action => "confirm"
303       else
304         user = token.user
305         user.status = "active"
306         user.email_valid = true
307         flash[:notice] = gravatar_status_message(user) if gravatar_enable(user)
308         user.save!
309         referer = token.referer
310         token.destroy
311
312         if session[:token]
313           token = UserToken.find_by(:token => session[:token])
314           session.delete(:token)
315         else
316           token = nil
317         end
318
319         if token.nil? || token.user != user
320           flash[:notice] = t("user.confirm.success")
321           redirect_to :action => :login, :referer => referer
322         else
323           token.destroy
324
325           session[:user] = user.id
326
327           redirect_to referer || welcome_path
328         end
329       end
330     else
331       user = User.find_by(:display_name => params[:display_name])
332
333       redirect_to root_path if user.nil? || user.active?
334     end
335   end
336
337   def confirm_resend
338     user = User.find_by(:display_name => params[:display_name])
339     token = UserToken.find_by(:token => session[:token])
340
341     if user.nil? || token.nil? || token.user != user
342       flash[:error] = t "user.confirm_resend.failure", :name => params[:display_name]
343     else
344       Notifier.signup_confirm(user, user.tokens.create).deliver_now
345       flash[:notice] = t("user.confirm_resend.success", :email => user.email, :sender => SUPPORT_EMAIL).html_safe
346     end
347
348     redirect_to :action => "login"
349   end
350
351   def confirm_email
352     if request.post?
353       token = UserToken.find_by(:token => params[:confirm_string])
354       if token && token.user.new_email?
355         self.current_user = token.user
356         current_user.email = current_user.new_email
357         current_user.new_email = nil
358         current_user.email_valid = true
359         gravatar_enabled = gravatar_enable(current_user)
360         if current_user.save
361           flash[:notice] = if gravatar_enabled
362                              t("user.confirm_email.success") + " " + gravatar_status_message(current_user)
363                            else
364                              t("user.confirm_email.success")
365                            end
366         else
367           flash[:errors] = current_user.errors
368         end
369         token.destroy
370         session[:user] = current_user.id
371         redirect_to :action => "account", :display_name => current_user.display_name
372       elsif token
373         flash[:error] = t "user.confirm_email.failure"
374         redirect_to :action => "account", :display_name => token.user.display_name
375       else
376         flash[:error] = t "user.confirm_email.unknown_token"
377       end
378     end
379   end
380
381   def api_read
382     if @this_user.visible?
383       render :action => :api_read, :content_type => "text/xml"
384     else
385       head :gone
386     end
387   end
388
389   def api_details
390     @this_user = current_user
391     render :action => :api_read, :content_type => "text/xml"
392   end
393
394   def api_gpx_files
395     doc = OSM::API.new.get_xml_doc
396     current_user.traces.reload.each do |trace|
397       doc.root << trace.to_xml_node
398     end
399     render :xml => doc.to_s
400   end
401
402   def view
403     @this_user = User.find_by(:display_name => params[:display_name])
404
405     if @this_user &&
406        (@this_user.visible? || (current_user && current_user.administrator?))
407       @title = @this_user.display_name
408     else
409       render_unknown_user params[:display_name]
410     end
411   end
412
413   def make_friend
414     @new_friend = User.find_by(:display_name => params[:display_name])
415
416     if @new_friend
417       if request.post?
418         friend = Friend.new
419         friend.befriender = current_user
420         friend.befriendee = @new_friend
421         if current_user.is_friends_with?(@new_friend)
422           flash[:warning] = t "user.make_friend.already_a_friend", :name => @new_friend.display_name
423         elsif friend.save
424           flash[:notice] = t "user.make_friend.success", :name => @new_friend.display_name
425           Notifier.friend_notification(friend).deliver_now
426         else
427           friend.add_error(t("user.make_friend.failed", :name => @new_friend.display_name))
428         end
429
430         if params[:referer]
431           redirect_to params[:referer]
432         else
433           redirect_to :action => "view"
434         end
435       end
436     else
437       render_unknown_user params[:display_name]
438     end
439   end
440
441   def remove_friend
442     @friend = User.find_by(:display_name => params[:display_name])
443
444     if @friend
445       if request.post?
446         if current_user.is_friends_with?(@friend)
447           Friend.where(:user_id => current_user.id, :friend_user_id => @friend.id).delete_all
448           flash[:notice] = t "user.remove_friend.success", :name => @friend.display_name
449         else
450           flash[:error] = t "user.remove_friend.not_a_friend", :name => @friend.display_name
451         end
452
453         if params[:referer]
454           redirect_to params[:referer]
455         else
456           redirect_to :action => "view"
457         end
458       end
459     else
460       render_unknown_user params[:display_name]
461     end
462   end
463
464   ##
465   # sets a user's status
466   def set_status
467     @this_user.status = params[:status]
468     @this_user.save
469     redirect_to :action => "view", :display_name => params[:display_name]
470   end
471
472   ##
473   # delete a user, marking them as deleted and removing personal data
474   def delete
475     @this_user.delete
476     redirect_to :action => "view", :display_name => params[:display_name]
477   end
478
479   ##
480   # display a list of users matching specified criteria
481   def list
482     if request.post?
483       ids = params[:user].keys.collect(&:to_i)
484
485       User.where(:id => ids).update_all(:status => "confirmed") if params[:confirm]
486       User.where(:id => ids).update_all(:status => "deleted") if params[:hide]
487
488       redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
489     else
490       @params = params.permit(:status, :ip)
491
492       conditions = {}
493       conditions[:status] = @params[:status] if @params[:status]
494       conditions[:creation_ip] = @params[:ip] if @params[:ip]
495
496       @user_pages, @users = paginate(:users,
497                                      :conditions => conditions,
498                                      :order => :id,
499                                      :per_page => 50)
500     end
501   end
502
503   ##
504   # omniauth success callback
505   def auth_success
506     auth_info = request.env["omniauth.auth"]
507
508     provider = auth_info[:provider]
509     uid = auth_info[:uid]
510     name = auth_info[:info][:name]
511     email = auth_info[:info][:email]
512
513     case provider
514     when "openid"
515       email_verified = uid.match(%r{https://www.google.com/accounts/o8/id?(.*)}) ||
516                        uid.match(%r{https://me.yahoo.com/(.*)})
517     when "google", "facebook"
518       email_verified = true
519     else
520       email_verified = false
521     end
522
523     if settings = session.delete(:new_user_settings)
524       current_user.auth_provider = provider
525       current_user.auth_uid = uid
526
527       update_user(current_user, settings)
528
529       session[:user_errors] = current_user.errors.as_json
530
531       redirect_to :action => "account", :display_name => current_user.display_name
532     elsif session[:new_user]
533       session[:new_user].auth_provider = provider
534       session[:new_user].auth_uid = uid
535
536       if email_verified && email == session[:new_user].email
537         session[:new_user].status = "active"
538       end
539
540       redirect_to :action => "terms"
541     else
542       user = User.find_by(:auth_provider => provider, :auth_uid => uid)
543
544       if user.nil? && provider == "google"
545         openid_url = auth_info[:extra][:id_info]["openid_id"]
546         user = User.find_by(:auth_provider => "openid", :auth_uid => openid_url) if openid_url
547         user.update(:auth_provider => provider, :auth_uid => uid) if user
548       end
549
550       if user
551         case user.status
552         when "pending" then
553           unconfirmed_login(user)
554         when "active", "confirmed" then
555           successful_login(user, request.env["omniauth.params"]["referer"])
556         when "suspended" then
557           failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe
558         else
559           failed_login t("user.login.auth failure")
560         end
561       else
562         redirect_to :action => "new", :nickname => name, :email => email,
563                     :auth_provider => provider, :auth_uid => uid
564       end
565     end
566   end
567
568   ##
569   # omniauth failure callback
570   def auth_failure
571     flash[:error] = t("user.auth_failure." + params[:message])
572     redirect_to params[:origin] || login_url
573   end
574
575   private
576
577   ##
578   # handle password authentication
579   def password_authentication(username, password)
580     if user = User.authenticate(:username => username, :password => password)
581       successful_login(user)
582     elsif user = User.authenticate(:username => username, :password => password, :pending => true)
583       unconfirmed_login(user)
584     elsif User.authenticate(:username => username, :password => password, :suspended => true)
585       failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe, username
586     else
587       failed_login t("user.login.auth failure"), username
588     end
589   end
590
591   ##
592   # return the URL to use for authentication
593   def auth_url(provider, uid, referer = nil)
594     params = { :provider => provider }
595
596     params[:openid_url] = openid_expand_url(uid) if provider == "openid"
597
598     if referer.nil?
599       params[:origin] = request.path
600     else
601       params[:origin] = request.path + "?referer=" + CGI.escape(referer)
602       params[:referer] = referer
603     end
604
605     auth_path(params)
606   end
607
608   ##
609   # special case some common OpenID providers by applying heuristics to
610   # try and come up with the correct URL based on what the user entered
611   def openid_expand_url(openid_url)
612     if openid_url.nil?
613       nil
614     elsif openid_url.match(%r{(.*)gmail.com(/?)$}) || openid_url.match(%r{(.*)googlemail.com(/?)$})
615       # Special case gmail.com as it is potentially a popular OpenID
616       # provider and, unlike yahoo.com, where it works automatically, Google
617       # have hidden their OpenID endpoint somewhere obscure this making it
618       # somewhat less user friendly.
619       "https://www.google.com/accounts/o8/id"
620     else
621       openid_url
622     end
623   end
624
625   ##
626   # process a successful login
627   def successful_login(user, referer = nil)
628     session[:user] = user.id
629     session_expires_after 28.days if session[:remember_me]
630
631     target = referer || session[:referer] || url_for(:controller => :site, :action => :index)
632
633     # The user is logged in, so decide where to send them:
634     #
635     # - If they haven't seen the contributor terms, send them there.
636     # - If they have a block on them, show them that.
637     # - If they were referred to the login, send them back there.
638     # - Otherwise, send them to the home page.
639     if REQUIRE_TERMS_SEEN && !user.terms_seen
640       redirect_to :action => :terms, :referer => target
641     elsif user.blocked_on_view
642       redirect_to user.blocked_on_view, :referer => target
643     else
644       redirect_to target
645     end
646
647     session.delete(:remember_me)
648     session.delete(:referer)
649   end
650
651   ##
652   # process a failed login
653   def failed_login(message, username = nil)
654     flash[:error] = message
655
656     redirect_to :action => "login", :referer => session[:referer],
657                 :username => username, :remember_me => session[:remember_me]
658
659     session.delete(:remember_me)
660     session.delete(:referer)
661   end
662
663   ##
664   #
665   def unconfirmed_login(user)
666     session[:token] = user.tokens.create.token
667
668     redirect_to :action => "confirm", :display_name => user.display_name
669
670     session.delete(:remember_me)
671     session.delete(:referer)
672   end
673
674   ##
675   # update a user's details
676   def update_user(user, params)
677     user.display_name = params[:user][:display_name]
678     user.new_email = params[:user][:new_email]
679
680     unless params[:user][:pass_crypt].empty? && params[:user][:pass_crypt_confirmation].empty?
681       user.pass_crypt = params[:user][:pass_crypt]
682       user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
683     end
684
685     if params[:user][:description] != user.description
686       user.description = params[:user][:description]
687       user.description_format = "markdown"
688     end
689
690     user.languages = params[:user][:languages].split(",")
691
692     case params[:image_action]
693     when "new" then
694       user.image = params[:user][:image]
695       user.image_use_gravatar = false
696     when "delete" then
697       user.image = nil
698       user.image_use_gravatar = false
699     when "gravatar" then
700       user.image = nil
701       user.image_use_gravatar = true
702     end
703
704     user.home_lat = params[:user][:home_lat]
705     user.home_lon = params[:user][:home_lon]
706
707     user.preferred_editor = if params[:user][:preferred_editor] == "default"
708                               nil
709                             else
710                               params[:user][:preferred_editor]
711                             end
712
713     if params[:user][:auth_provider].nil? || params[:user][:auth_provider].blank?
714       user.auth_provider = nil
715       user.auth_uid = nil
716     end
717
718     if user.save
719       set_locale
720
721       if user.new_email.blank? || user.new_email == user.email
722         flash.now[:notice] = t "user.account.flash update success"
723       else
724         user.email = user.new_email
725
726         if user.valid?
727           flash.now[:notice] = t "user.account.flash update success confirm needed"
728
729           begin
730             Notifier.email_confirm(user, user.tokens.create).deliver_now
731           rescue StandardError
732             # Ignore errors sending email
733           end
734         else
735           current_user.errors.add(:new_email, current_user.errors[:email])
736           current_user.errors.add(:email, [])
737         end
738
739         user.restore_email!
740       end
741     end
742   end
743
744   ##
745   # require that the user is a administrator, or fill out a helpful error message
746   # and return them to the user page.
747   def require_administrator
748     if current_user && !current_user.administrator?
749       flash[:error] = t("user.filter.not_an_administrator")
750
751       if params[:display_name]
752         redirect_to :action => "view", :display_name => params[:display_name]
753       else
754         redirect_to :action => "login", :referer => request.fullpath
755       end
756     elsif !current_user
757       redirect_to :action => "login", :referer => request.fullpath
758     end
759   end
760
761   ##
762   # require that the user in the URL is the logged in user
763   def require_self
764     head :forbidden if params[:display_name] != current_user.display_name
765   end
766
767   ##
768   # ensure that there is a "this_user" instance variable
769   def lookup_user_by_id
770     @this_user = User.find(params[:id])
771   end
772
773   ##
774   # ensure that there is a "this_user" instance variable
775   def lookup_user_by_name
776     @this_user = User.find_by(:display_name => params[:display_name])
777   rescue ActiveRecord::RecordNotFound
778     redirect_to :action => "view", :display_name => params[:display_name] unless @this_user
779   end
780
781   ##
782   #
783   def disable_terms_redirect
784     # this is necessary otherwise going to the user terms page, when
785     # having not agreed already would cause an infinite redirect loop.
786     # it's .now so that this doesn't propagate to other pages.
787     flash.now[:skip_terms] = true
788   end
789
790   ##
791   # return permitted user parameters
792   def user_params
793     params.require(:user).permit(:email, :email_confirmation, :display_name,
794                                  :auth_provider, :auth_uid,
795                                  :pass_crypt, :pass_crypt_confirmation)
796   end
797
798   ##
799   # check signup acls
800   def check_signup_allowed(email = nil)
801     domain = if email.nil?
802                nil
803              else
804                email.split("@").last
805              end
806
807     if blocked = Acl.no_account_creation(request.remote_ip, domain)
808       logger.info "Blocked signup from #{request.remote_ip} for #{email}"
809
810       render :action => "blocked"
811     end
812
813     !blocked
814   end
815
816   ##
817   # check if this user has a gravatar and set the user pref is true
818   def gravatar_enable(user)
819     # code from example https://en.gravatar.com/site/implement/images/ruby/
820     return false if user.image.present?
821     hash = Digest::MD5.hexdigest(user.email.downcase)
822     url = "https://www.gravatar.com/avatar/#{hash}?d=404" # without d=404 we will always get an image back
823     response = OSM.http_client.get(URI.parse(url))
824     oldsetting = user.image_use_gravatar
825     user.image_use_gravatar = response.success?
826     oldsetting != user.image_use_gravatar
827   end
828
829   ##
830   # display a message about th current status of the gravatar setting
831   def gravatar_status_message(user)
832     if user.image_use_gravatar
833       t "user.account.gravatar.enabled"
834     else
835       t "user.account.gravatar.disabled"
836     end
837   end
838 end