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