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         user.save!
 301         referer = token.referer
 302         token.destroy
 303
 304         if session[:token]
 305           token = UserToken.find_by_token(session[:token])
 306           session.delete(:token)
 307         else
 308           token = nil
 309         end
 310
 311         if token.nil? || token.user != user
 312           flash[:notice] = t("user.confirm.success")
 313           redirect_to :action => :login, :referer => referer
 314         else
 315           token.destroy
 316
 317           session[:user] = user.id
 318
 319           redirect_to referer || welcome_path
 320         end
 321       end
 322     else
 323       user = User.find_by_display_name(params[:display_name])
 324
 325       redirect_to root_path if user.nil? || user.active?
 326     end
 327   end
 328
 329   def confirm_resend
 330     user = User.find_by_display_name(params[:display_name])
 331     token = UserToken.find_by_token(session[:token])
 332
 333     if user.nil? || token.nil? || token.user != user
 334       flash[:error] = t "user.confirm_resend.failure", :name => params[:display_name]
 335     else
 336       Notifier.signup_confirm(user, user.tokens.create).deliver_now
 337       flash[:notice] = t("user.confirm_resend.success", :email => user.email, :sender => SUPPORT_EMAIL).html_safe
 338     end
 339
 340     redirect_to :action => "login"
 341   end
 342
 343   def confirm_email
 344     if request.post?
 345       token = UserToken.find_by_token(params[:confirm_string])
 346       if token && token.user.new_email?
 347         @user = token.user
 348         @user.email = @user.new_email
 349         @user.new_email = nil
 350         @user.email_valid = true
 351         if @user.save
 352           flash[:notice] = t "user.confirm_email.success"
 353         else
 354           flash[:errors] = @user.errors
 355         end
 356         token.destroy
 357         session[:user] = @user.id
 358         redirect_to :action => "account", :display_name => @user.display_name
 359       elsif token
 360         flash[:error] = t "user.confirm_email.failure"
 361         redirect_to :action => "account", :display_name => token.user.display_name
 362       else
 363         flash[:error] = t "user.confirm_email.unknown_token"
 364       end
 365     end
 366   end
 367
 368   def api_read
 369     if @this_user.visible?
 370       render :action => :api_read, :content_type => "text/xml"
 371     else
 372       render :text => "", :status => :gone
 373     end
 374   end
 375
 376   def api_details
 377     @this_user = @user
 378     render :action => :api_read, :content_type => "text/xml"
 379   end
 380
 381   def api_gpx_files
 382     doc = OSM::API.new.get_xml_doc
 383     @user.traces.reload.each do |trace|
 384       doc.root << trace.to_xml_node
 385     end
 386     render :text => doc.to_s, :content_type => "text/xml"
 387   end
 388
 389   def view
 390     @this_user = User.find_by_display_name(params[:display_name])
 391
 392     if @this_user &&
 393        (@this_user.visible? || (@user && @user.administrator?))
 394       @title = @this_user.display_name
 395     else
 396       render_unknown_user params[:display_name]
 397     end
 398   end
 399
 400   def make_friend
 401     @new_friend = User.find_by_display_name(params[:display_name])
 402
 403     if @new_friend
 404       if request.post?
 405         friend = Friend.new
 406         friend.user_id = @user.id
 407         friend.friend_user_id = @new_friend.id
 408         if @user.is_friends_with?(@new_friend)
 409           flash[:warning] = t "user.make_friend.already_a_friend", :name => @new_friend.display_name
 410         elsif friend.save
 411           flash[:notice] = t "user.make_friend.success", :name => @new_friend.display_name
 412           Notifier.friend_notification(friend).deliver_now
 413         else
 414           friend.add_error(t("user.make_friend.failed", :name => @new_friend.display_name))
 415         end
 416
 417         if params[:referer]
 418           redirect_to params[:referer]
 419         else
 420           redirect_to :controller => "user", :action => "view"
 421         end
 422       end
 423     else
 424       render_unknown_user params[:display_name]
 425     end
 426   end
 427
 428   def remove_friend
 429     @friend = User.find_by_display_name(params[:display_name])
 430
 431     if @friend
 432       if request.post?
 433         if @user.is_friends_with?(@friend)
 434           Friend.delete_all "user_id = #{@user.id} AND friend_user_id = #{@friend.id}"
 435           flash[:notice] = t "user.remove_friend.success", :name => @friend.display_name
 436         else
 437           flash[:error] = t "user.remove_friend.not_a_friend", :name => @friend.display_name
 438         end
 439
 440         if params[:referer]
 441           redirect_to params[:referer]
 442         else
 443           redirect_to :controller => "user", :action => "view"
 444         end
 445       end
 446     else
 447       render_unknown_user params[:display_name]
 448     end
 449   end
 450
 451   ##
 452   # sets a user's status
 453   def set_status
 454     @this_user.status = params[:status]
 455     @this_user.save
 456     redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
 457   end
 458
 459   ##
 460   # delete a user, marking them as deleted and removing personal data
 461   def delete
 462     @this_user.delete
 463     redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
 464   end
 465
 466   ##
 467   # display a list of users matching specified criteria
 468   def list
 469     if request.post?
 470       ids = params[:user].keys.collect(&:to_i)
 471
 472       User.where(:id => ids).update_all(:status => "confirmed") if params[:confirm]
 473       User.where(:id => ids).update_all(:status => "deleted") if params[:hide]
 474
 475       redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
 476     else
 477       conditions = {}
 478       conditions[:status] = params[:status] if params[:status]
 479       conditions[:creation_ip] = params[:ip] if params[:ip]
 480
 481       @user_pages, @users = paginate(:users,
 482                                      :conditions => conditions,
 483                                      :order => :id,
 484                                      :per_page => 50)
 485     end
 486   end
 487
 488   ##
 489   # omniauth success callback
 490   def auth_success
 491     auth_info = env["omniauth.auth"]
 492
 493     provider = auth_info[:provider]
 494     uid = auth_info[:uid]
 495     name = auth_info[:info][:name]
 496     email = auth_info[:info][:email]
 497
 498     case provider
 499     when "openid"
 500       email_verified = uid.match(%r{https://www.google.com/accounts/o8/id?(.*)}) ||
 501                        uid.match(%r{https://me.yahoo.com/(.*)})
 502     when "google", "facebook"
 503       email_verified = true
 504     else
 505       email_verified = false
 506     end
 507
 508     if settings = session.delete(:new_user_settings)
 509       @user.auth_provider = provider
 510       @user.auth_uid = uid
 511
 512       update_user(@user, settings)
 513
 514       session[:user_errors] = @user.errors.as_json
 515
 516       redirect_to :action => "account", :display_name => @user.display_name
 517     elsif session[:new_user]
 518       session[:new_user].auth_provider = provider
 519       session[:new_user].auth_uid = uid
 520
 521       if email_verified && email == session[:new_user].email
 522         session[:new_user].status = "active"
 523       end
 524
 525       redirect_to :action => "terms"
 526     else
 527       user = User.find_by_auth_provider_and_auth_uid(provider, uid)
 528
 529       if user.nil? && provider == "google"
 530         openid_url = auth_info[:extra][:id_info]["openid_id"]
 531         user = User.find_by_auth_provider_and_auth_uid("openid", openid_url) if openid_url
 532         user.update(:auth_provider => provider, :auth_uid => uid) if user
 533       end
 534
 535       if user
 536         case user.status
 537         when "pending" then
 538           unconfirmed_login(user)
 539         when "active", "confirmed" then
 540           successful_login(user, env["omniauth.params"]["referer"])
 541         when "suspended" then
 542           failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}")
 543         else
 544           failed_login t("user.login.auth failure")
 545         end
 546       else
 547         redirect_to :action => "new", :nickname => name, :email => email,
 548                     :auth_provider => provider, :auth_uid => uid
 549       end
 550     end
 551   end
 552
 553   ##
 554   # omniauth failure callback
 555   def auth_failure
 556     flash[:error] = t("user.auth_failure." + params[:message])
 557     redirect_to params[:origin] || login_url
 558   end
 559
 560   private
 561
 562   ##
 563   # handle password authentication
 564   def password_authentication(username, password)
 565     if user = User.authenticate(:username => username, :password => password)
 566       successful_login(user)
 567     elsif user = User.authenticate(:username => username, :password => password, :pending => true)
 568       unconfirmed_login(user)
 569     elsif User.authenticate(:username => username, :password => password, :suspended => true)
 570       failed_login t("user.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}"), username
 571     else
 572       failed_login t("user.login.auth failure"), username
 573     end
 574   end
 575
 576   ##
 577   # return the URL to use for authentication
 578   def auth_url(provider, uid, referer = nil)
 579     params = { :provider => provider }
 580
 581     params[:openid_url] = openid_expand_url(uid) if provider == "openid"
 582
 583     if referer.nil?
 584       params[:origin] = request.path
 585     else
 586       params[:origin] = request.path + "?referer=" + CGI.escape(referer)
 587       params[:referer] = referer
 588     end
 589
 590     auth_path(params)
 591   end
 592
 593   ##
 594   # special case some common OpenID providers by applying heuristics to
 595   # try and come up with the correct URL based on what the user entered
 596   def openid_expand_url(openid_url)
 597     if openid_url.nil?
 598       return nil
 599     elsif openid_url.match(%r{(.*)gmail.com(/?)$}) || openid_url.match(%r{(.*)googlemail.com(/?)$})
 600       # Special case gmail.com as it is potentially a popular OpenID
 601       # provider and, unlike yahoo.com, where it works automatically, Google
 602       # have hidden their OpenID endpoint somewhere obscure this making it
 603       # somewhat less user friendly.
 604       return "https://www.google.com/accounts/o8/id"
 605     else
 606       return openid_url
 607     end
 608   end
 609
 610   ##
 611   # process a successful login
 612   def successful_login(user, referer = nil)
 613     session[:user] = user.id
 614     session_expires_after 28.days if session[:remember_me]
 615
 616     target = referer || session[:referer] || url_for(:controller => :site, :action => :index)
 617
 618     # The user is logged in, so decide where to send them:
 619     #
 620     # - If they haven't seen the contributor terms, send them there.
 621     # - If they have a block on them, show them that.
 622     # - If they were referred to the login, send them back there.
 623     # - Otherwise, send them to the home page.
 624     if REQUIRE_TERMS_SEEN && !user.terms_seen
 625       redirect_to :controller => :user, :action => :terms, :referer => target
 626     elsif user.blocked_on_view
 627       redirect_to user.blocked_on_view, :referer => target
 628     else
 629       redirect_to target
 630     end
 631
 632     session.delete(:remember_me)
 633     session.delete(:referer)
 634   end
 635
 636   ##
 637   # process a failed login
 638   def failed_login(message, username = nil)
 639     flash[:error] = message
 640
 641     redirect_to :action => "login", :referer => session[:referer],
 642                 :username => username, :remember_me => session[:remember_me]
 643
 644     session.delete(:remember_me)
 645     session.delete(:referer)
 646   end
 647
 648   ##
 649   #
 650   def unconfirmed_login(user)
 651     session[:token] = user.tokens.create.token
 652
 653     redirect_to :action => "confirm", :display_name => user.display_name
 654
 655     session.delete(:remember_me)
 656     session.delete(:referer)
 657   end
 658
 659   ##
 660   # update a user's details
 661   def update_user(user, params)
 662     user.display_name = params[:user][:display_name]
 663     user.new_email = params[:user][:new_email]
 664
 665     unless params[:user][:pass_crypt].empty? && params[:user][:pass_crypt_confirmation].empty?
 666       user.pass_crypt = params[:user][:pass_crypt]
 667       user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
 668     end
 669
 670     if params[:user][:description] != user.description
 671       user.description = params[:user][:description]
 672       user.description_format = "markdown"
 673     end
 674
 675     user.languages = params[:user][:languages].split(",")
 676
 677     case params[:image_action]
 678     when "new" then
 679       user.image = params[:user][:image]
 680       user.image_use_gravatar = false
 681     when "delete" then
 682       user.image = nil
 683       user.image_use_gravatar = false
 684     when "gravatar" then
 685       user.image = nil
 686       user.image_use_gravatar = true
 687     end
 688
 689     user.home_lat = params[:user][:home_lat]
 690     user.home_lon = params[:user][:home_lon]
 691
 692     user.preferred_editor = if params[:user][:preferred_editor] == "default"
 693                               nil
 694                             else
 695                               params[:user][:preferred_editor]
 696                             end
 697
 698     if params[:user][:auth_provider].nil? || params[:user][:auth_provider].blank?
 699       user.auth_provider = nil
 700       user.auth_uid = nil
 701     end
 702
 703     if user.save
 704       set_locale
 705
 706       if user.new_email.blank? || user.new_email == user.email
 707         flash.now[:notice] = t "user.account.flash update success"
 708       else
 709         user.email = user.new_email
 710
 711         if user.valid?
 712           flash.now[:notice] = t "user.account.flash update success confirm needed"
 713
 714           begin
 715             Notifier.email_confirm(user, user.tokens.create).deliver_now
 716           rescue
 717             # Ignore errors sending email
 718           end
 719         else
 720           @user.errors.set(:new_email, @user.errors.get(:email))
 721           @user.errors.set(:email, [])
 722         end
 723
 724         user.restore_email!
 725       end
 726     end
 727   end
 728
 729   ##
 730   # require that the user is a administrator, or fill out a helpful error message
 731   # and return them to the user page.
 732   def require_administrator
 733     if @user && !@user.administrator?
 734       flash[:error] = t("user.filter.not_an_administrator")
 735
 736       if params[:display_name]
 737         redirect_to :controller => "user", :action => "view", :display_name => params[:display_name]
 738       else
 739         redirect_to :controller => "user", :action => "login", :referer => request.fullpath
 740       end
 741     elsif !@user
 742       redirect_to :controller => "user", :action => "login", :referer => request.fullpath
 743     end
 744   end
 745
 746   ##
 747   # require that the user in the URL is the logged in user
 748   def require_self
 749     if params[:display_name] != @user.display_name
 750       render :text => "", :status => :forbidden
 751     end
 752   end
 753
 754   ##
 755   # ensure that there is a "this_user" instance variable
 756   def lookup_user_by_id
 757     @this_user = User.find(params[:id])
 758   end
 759
 760   ##
 761   # ensure that there is a "this_user" instance variable
 762   def lookup_user_by_name
 763     @this_user = User.find_by_display_name(params[:display_name])
 764   rescue ActiveRecord::RecordNotFound
 765     redirect_to :controller => "user", :action => "view", :display_name => params[:display_name] unless @this_user
 766   end
 767
 768   ##
 769   #
 770   def disable_terms_redirect
 771     # this is necessary otherwise going to the user terms page, when
 772     # having not agreed already would cause an infinite redirect loop.
 773     # it's .now so that this doesn't propagate to other pages.
 774     flash.now[:skip_terms] = true
 775   end
 776
 777   ##
 778   # return permitted user parameters
 779   def user_params
 780     params.require(:user).permit(:email, :email_confirmation, :display_name,
 781                                  :auth_provider, :auth_uid,
 782                                  :pass_crypt, :pass_crypt_confirmation)
 783   end
 784
 785   ##
 786   # check signup acls
 787   def check_signup_allowed(email = nil)
 788     domain = if email.nil?
 789                nil
 790              else
 791                email.split("@").last
 792              end
 793
 794     if blocked = Acl.no_account_creation(request.remote_ip, domain)
 795       logger.info "Blocked signup from #{request.remote_ip} for #{email}"
 796
 797       render :action => "blocked"
 798     end
 799
 800     !blocked
 801   end
 802 end