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