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