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