X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/f9baf5f392370318966c9392e3badbbd715592ad..d1aa084d2804137d2c1d4bf04f7fd5fe319d6772:/app/controllers/user_controller.rb

diff --git a/app/controllers/user_controller.rb b/app/controllers/user_controller.rb
index 9fd20f2ff..321b61918 100644
--- a/app/controllers/user_controller.rb
+++ b/app/controllers/user_controller.rb
@@ -1,30 +1,187 @@
 class UserController < ApplicationController
-  layout 'site'
+  layout :choose_layout
+
+  skip_before_filter :verify_authenticity_token, :only => [:api_read, :api_details, :api_gpx_files]
+  before_filter :disable_terms_redirect, :only => [:terms, :save, :logout, :api_details]
+  before_filter :authorize, :only => [:api_details, :api_gpx_files]
+  before_filter :authorize_web, :except => [:api_read, :api_details, :api_gpx_files]
+  before_filter :set_locale, :except => [:api_read, :api_details, :api_gpx_files]
+  before_filter :require_user, :only => [:account, :go_public, :make_friend, :remove_friend]
+  before_filter :check_database_readable, :except => [:login, :api_read, :api_details, :api_gpx_files]
+  before_filter :check_database_writable, :only => [:new, :account, :confirm, :confirm_email, :lost_password, :reset_password, :go_public, :make_friend, :remove_friend]
+  before_filter :check_api_readable, :only => [:api_read, :api_details, :api_gpx_files]
+  before_filter :require_allow_read_prefs, :only => [:api_details]
+  before_filter :require_allow_read_gpx, :only => [:api_gpx_files]
+  before_filter :require_cookies, :only => [:login, :confirm]
+  before_filter :require_administrator, :only => [:set_status, :delete, :list]
+  around_filter :api_call_handle_error, :only => [:api_read, :api_details, :api_gpx_files]
+  before_filter :lookup_user_by_id, :only => [:api_read]
+  before_filter :lookup_user_by_name, :only => [:set_status, :delete]
+
+  cache_sweeper :user_sweeper, :only => [:account, :set_status, :delete]
+
+  def terms
+    @legale = params[:legale] || OSM.IPToCountry(request.remote_ip) || DEFAULT_LEGALE
+    @text = OSM.legal_text_for_country(@legale)
+
+    if request.xhr?
+      render :partial => "terms"
+    elsif using_open_id?
+      # The redirect from the OpenID provider reenters here
+      # again and we need to pass the parameters through to
+      # the open_id_authentication function
+      @user = session.delete(:new_user)
+
+      openid_verify(nil, @user) do |user,verified_email|
+        user.status = "active" if user.email == verified_email
+      end
+
+      if @user.openid_url.nil? or @user.invalid?
+        render :action => 'new'
+      else
+        session[:new_user] = @user
+        render :action => 'terms'
+      end
+    elsif params[:user] and Acl.no_account_creation(request.remote_ip, params[:user][:email].split("@").last)
+      render :action => 'blocked'
+    else
+      session[:referer] = params[:referer]
+
+      @title = t 'user.terms.title'
+      @user = User.new(params[:user]) if params[:user]
+
+      if params[:user] and params[:user][:openid_url] and @user.pass_crypt.empty?
+        # We are creating an account with OpenID and no password
+        # was specified so create a random one
+        @user.pass_crypt = SecureRandom.base64(16)
+        @user.pass_crypt_confirmation = @user.pass_crypt
+      end
+
+      if @user
+        @user.status = "pending"
+
+        if @user.invalid?
+          if @user.new_record?
+            # Something is wrong with a new user, so rerender the form
+            render :action => :new
+          else
+            # Error in existing user, so go to account settings
+            flash[:errors] = @user.errors
+            redirect_to :action => :account, :display_name => @user.display_name
+          end
+        elsif @user.terms_agreed?
+          # Already agreed to terms, so just show settings
+          redirect_to :action => :account, :display_name => @user.display_name
+        elsif params[:user] and params[:user][:openid_url] and not params[:user][:openid_url].empty?
+          # Verify OpenID before moving on
+          session[:new_user] = @user
+          openid_verify(params[:user][:openid_url], @user)
+        elsif @user.new_record?
+          # Save the user record
+          session[:new_user] = @user
+        end
+      else
+        # Not logged in, so redirect to the login page
+        redirect_to :action => :login, :referer => request.fullpath
+      end
+    end
+  end
 
-  before_filter :authorize, :only => [:preferences, :api_details, :api_gpx_files]
-  before_filter :authorize_web, :only => [:edit, :account, :go_public, :view]
-  before_filter :require_user, :only => [:edit, :account, :go_public]
- 
   def save
-    @user = User.new(params[:user])
-    @user.set_defaults
+    @title = t 'user.new.title'
+
+    if params[:decline]
+      if @user
+        @user.terms_seen = true
+
+        if @user.save
+          flash[:notice] = t 'user.new.terms declined', :url => t('user.new.terms declined url')
+        end
 
-    if @user.save
-      flash[:notice] = 'User was successfully created. Check your email for a confirmation note, and you\'ll be mapping in no time :-)'
-      Notifier::deliver_signup_confirm(@user)
-      redirect_to :action => 'login'
+        if params[:referer]
+          redirect_to params[:referer]
+        else
+          redirect_to :action => :account, :display_name => @user.display_name
+        end
+      else
+        redirect_to t('user.terms.declined')
+      end
+    elsif @user
+      if !@user.terms_agreed?
+        @user.consider_pd = params[:user][:consider_pd]
+        @user.terms_agreed = Time.now.getutc
+        @user.terms_seen = true
+        if @user.save
+          flash[:notice] = t 'user.new.terms accepted'
+        end
+      end
+
+      if params[:referer]
+        redirect_to params[:referer]
+      else
+        redirect_to :action => :account, :display_name => @user.display_name
+      end
     else
-      render :action => 'new'
+      @user = session.delete(:new_user)
+
+      if Acl.no_account_creation(request.remote_ip, @user.email.split("@").last)
+        render :action => 'blocked'
+      else
+        @user.data_public = true
+        @user.description = "" if @user.description.nil?
+        @user.creation_ip = request.remote_ip
+        @user.languages = request.user_preferred_languages
+        @user.terms_agreed = Time.now.getutc
+        @user.terms_seen = true
+        @user.openid_url = nil if @user.openid_url and @user.openid_url.empty?
+
+        if @user.save
+          flash[:piwik_goal] = PIWIK_SIGNUP_GOAL if defined?(PIWIK_SIGNUP_GOAL)
+
+          if @user.status == "active"
+            flash[:notice] = t 'user.new.flash welcome', :email => @user.email
+
+            Notifier.signup_confirm(@user, nil).deliver
+
+            successful_login(@user)
+          else
+            flash[:notice] = t 'user.new.flash create success message', :email => @user.email
+            session[:token] = @user.tokens.create.token
+
+            Notifier.signup_confirm(@user, @user.tokens.create(:referer => session.delete(:referer))).deliver
+
+            redirect_to :action => 'login', :referer => params[:referer]
+          end
+        else
+          render :action => 'new', :referer => params[:referer]
+        end
+      end
     end
   end
 
-  def edit
+  def account
+    @title = t 'user.account.title'
+    @tokens = @user.oauth_tokens.authorized
+
     if params[:user] and params[:user][:display_name] and params[:user][:description]
-      @user.display_name = params[:user][:display_name]
-      @user.description = params[:user][:description]
-      if @user.save
-        flash[:notice] = "User edited OK."
-        redirect_to :controller => 'user', :action => 'account'
+      if params[:user][:openid_url] and
+         params[:user][:openid_url].length > 0 and
+         params[:user][:openid_url] != @user.openid_url
+        # If the OpenID has changed, we want to check that it is a
+        # valid OpenID and one the user has control over before saving
+        # it as a password equivalent for the user.
+        session[:new_user_settings] = params
+        openid_verify(params[:user][:openid_url], @user)
+      else
+        update_user(@user, params)
+      end
+    elsif using_open_id?
+      # The redirect from the OpenID provider reenters here
+      # again and we need to pass the parameters through to
+      # the open_id_authentication function
+      settings = session.delete(:new_user_settings)
+      openid_verify(nil, @user) do |user|
+        update_user(user, settings)
       end
     end
   end
@@ -32,103 +189,218 @@ class UserController < ApplicationController
   def go_public
     @user.data_public = true
     @user.save
-    flash[:notice] = 'All your edits are now public'
-    redirect_to :controller => 'user', :action => 'account'
+    flash[:notice] = t 'user.go_public.flash success'
+    redirect_to :controller => 'user', :action => 'account', :display_name => @user.display_name
   end
 
   def lost_password
-    if params['user']['email']
-      user = User.find_by_email(params['user']['email'])
+    @title = t 'user.lost_password.title'
+
+    if params[:user] and params[:user][:email]
+      user = User.visible.find_by_email(params[:user][:email])
+
+      if user.nil?
+        users = User.visible.where("LOWER(email) = LOWER(?)", params[:user][:email])
+
+        if users.count == 1
+          user = users.first
+        end
+      end
+
       if user
-        user.token = User.make_token
-        user.save
-        Notifier::deliver_lost_password(user)
-        flash[:notice] = "Sorry you lost it :-( but an email is on it's way so you can reset it soon."
+        token = user.tokens.create
+        Notifier.lost_password(user, token).deliver
+        flash[:notice] = t 'user.lost_password.notice email on way'
+        redirect_to :action => 'login'
       else
-        flash[:notice] = "Couldn't find that email address, sorry."
+        flash.now[:error] = t 'user.lost_password.notice email cannot find'
       end
     end
   end
 
   def reset_password
-    if params['token']
-      user = User.find_by_token(params['token'])
-      if user
-        pass = User.make_token(8)
-        user.pass_crypt = pass
-        user.save
-        Notifier::deliver_reset_password(user, pass)
-        flash[:notice] = "You're password has been changed and is on the way to your mailbox :-)"
+    @title = t 'user.reset_password.title'
+
+    if params[:token]
+      token = UserToken.find_by_token(params[:token])
+
+      if token
+        @user = token.user
+
+        if params[:user]
+          @user.pass_crypt = params[:user][:pass_crypt]
+          @user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
+          @user.status = "active" if @user.status == "pending"
+          @user.email_valid = true
+
+          if @user.save
+            token.destroy
+            flash[:notice] = t 'user.reset_password.flash changed'
+            redirect_to :action => 'login'
+          end
+        end
       else
-        flash[:notice] = "Didn't find that token, check the URL maybe?"
+        flash[:error] = t 'user.reset_password.flash token bad'
+        redirect_to :action => 'lost_password'
       end
     end
-    redirect_to :action => 'login'
   end
 
   def new
+    @title = t 'user.new.title'
+    @referer = params[:referer] || session[:referer]
+
+    if @user
+      # The user is logged in already, so don't show them the signup
+      # page, instead send them to the home page
+      if @referer
+        redirect_to @referer
+      else
+        redirect_to :controller => 'site', :action => 'index'
+      end
+    elsif params.key?(:openid)
+      @user = User.new(:email => params[:email],
+                       :email_confirmation => params[:email],
+                       :display_name => params[:nickname],
+                       :openid_url => params[:openid])
+
+      flash.now[:notice] = t 'user.new.openid association'
+    elsif Acl.no_account_creation(request.remote_ip)
+      render :action => 'blocked'
+    end
   end
 
   def login
-    if params[:user]
-      email = params[:user][:email]
-      pass = params[:user][:password]
-      u = User.authenticate(email, pass)
-      if u
-        u.token = User.make_token
-        u.timeout = 1.day.from_now
-        u.save
-        session[:token] = u.token
-        redirect_to :controller => 'site', :action => 'index'
-        return
+    if params[:username] or using_open_id?
+      session[:remember_me] ||= params[:remember_me]
+      session[:referer] ||= params[:referer]
+
+      if using_open_id?
+        openid_authentication(params[:openid_url])
       else
-        flash[:notice] = "Couldn't log in with those details"
+        password_authentication(params[:username], params[:password])
       end
     end
   end
 
   def logout
-    if session[:token]
-      u = User.find_by_token(session[:token])
-      if u
-        u.token = User.make_token
-        u.timeout = Time.now
-        u.save
+    @title = t 'user.logout.title'
+
+    if params[:session] == request.session_options[:id]
+      if session[:token]
+        token = UserToken.find_by_token(session[:token])
+        if token
+          token.destroy
+        end
+        session.delete(:token)
+      end
+      session.delete(:user)
+      session_expires_automatically
+      if params[:referer]
+        redirect_to params[:referer]
+      else
+        redirect_to :controller => 'site', :action => 'index'
       end
     end
-    session[:token] = nil
-    redirect_to :controller => 'site', :action => 'index'
   end
 
   def confirm
-    @user = User.find_by_token(params[:confirm_string])
-    if @user && @user.active == 0
-      @user.active = true
-      @user.save
-      flash[:notice] = 'Confirmed your account, thanks for signing up!'
+    if request.post?
+      if token = UserToken.find_by_token(params[:confirm_string])
+        if token.user.active?
+          flash[:error] = t('user.confirm.already active')
+          redirect_to :action => 'login'
+        else
+          user = token.user
+          user.status = "active"
+          user.email_valid = true
+          user.save!
+          referer = token.referer
+          token.destroy
 
-      #FIXME: login the person magically
+          if session[:token]
+            token = UserToken.find_by_token(session[:token])
+            session.delete(:token)
+          else
+            token = nil
+          end
 
-      redirect_to :action => 'login'
-    else
-      flash[:notice] = 'Something went wrong confirming that user'
+          if token.nil? or token.user != user
+            flash[:notice] = t('user.confirm.success')
+            redirect_to :action => :login, :referer => referer
+          else
+            token.destroy
+
+            session[:user] = user.id
+            cookies.permanent["_osm_username"] = user.display_name
+
+            if referer.nil?
+              flash[:notice] = t('user.confirm.success') + "<br /><br />" + t('user.confirm.before you start')
+              redirect_to :action => :account, :display_name => user.display_name
+            else
+              flash[:notice] = t('user.confirm.success')
+              redirect_to referer
+            end
+          end
+        end
+      else
+        user = User.find_by_display_name(params[:display_name])
+
+        if user and user.active?
+          flash[:error] = t('user.confirm.already active')
+        elsif user
+          flash[:error] = t('user.confirm.unknown token') + t('user.confirm.reconfirm', :reconfirm => url_for(:action => 'confirm_resend', :display_name => params[:display_name]))
+        else
+          flash[:error] = t('user.confirm.unknown token')
+        end
+
+        redirect_to :action => 'login'
+      end
     end
   end
 
-  def preferences
-    if request.get?
-      render_text @user.preferences
-    elsif request.post? or request.put?
-      @user.preferences = request.raw_post
-      @user.save!
-      render :nothing => true
+  def confirm_resend
+    if user = User.find_by_display_name(params[:display_name])
+      Notifier.signup_confirm(user, user.tokens.create).deliver
+      flash[:notice] = t 'user.confirm_resend.success', :email => user.email
     else
-      render :status => 400, :nothing => true
+      flash[:notice] = t 'user.confirm_resend.failure', :name => params[:display_name]
     end
+
+    redirect_to :action => 'login'
+  end
+
+  def confirm_email
+    if request.post?
+      token = UserToken.find_by_token(params[:confirm_string])
+      if token and token.user.new_email?
+        @user = token.user
+        @user.email = @user.new_email
+        @user.new_email = nil
+        @user.email_valid = true
+        if @user.save
+          flash[:notice] = t 'user.confirm_email.success'
+        else
+          flash[:errors] = @user.errors
+        end
+        token.destroy
+        session[:user] = @user.id
+        cookies.permanent["_osm_username"] = @user.display_name
+        redirect_to :action => 'account', :display_name => @user.display_name
+      else
+        flash[:error] = t 'user.confirm_email.failure'
+        redirect_to :action => 'account', :display_name => @user.display_name
+      end
+    end
+  end
+
+  def api_read
+    render :nothing => true, :status => :gone unless @this_user.visible?
   end
 
   def api_details
-    render :text => @user.to_xml.to_s
+    @this_user = @user
+    render :action => :api_read
   end
 
   def api_gpx_files
@@ -136,14 +408,401 @@ class UserController < ApplicationController
     @user.traces.each do |trace|
       doc.root << trace.to_xml_node() if trace.public? or trace.user == @user
     end
-    render :text => doc.to_s
+    render :text => doc.to_s, :content_type => "text/xml"
   end
 
-
   def view
     @this_user = User.find_by_display_name(params[:display_name])
+
+    if @this_user and
+       (@this_user.visible? or (@user and @user.administrator?))
+      @title = @this_user.display_name
+    else
+      render_unknown_user params[:display_name]
+    end
   end
 
+  def make_friend
+    @new_friend = User.find_by_display_name(params[:display_name])
 
-end
+    if @new_friend
+      if request.post?
+        friend = Friend.new
+        friend.user_id = @user.id
+        friend.friend_user_id = @new_friend.id
+        unless @user.is_friends_with?(@new_friend)
+          if friend.save
+            flash[:notice] = t 'user.make_friend.success', :name => @new_friend.display_name
+            Notifier.friend_notification(friend).deliver
+          else
+            friend.add_error(t('user.make_friend.failed', :name => @new_friend.display_name))
+          end
+        else
+          flash[:warning] = t 'user.make_friend.already_a_friend', :name => @new_friend.display_name
+        end
+
+        if params[:referer]
+          redirect_to params[:referer]
+        else
+          redirect_to :controller => 'user', :action => 'view'
+        end
+      end
+    else
+      render_unknown_user params[:display_name]
+    end
+  end
+
+  def remove_friend
+    @friend = User.find_by_display_name(params[:display_name])
+
+    if @friend
+      if request.post?
+        if @user.is_friends_with?(@friend)
+          Friend.delete_all "user_id = #{@user.id} AND friend_user_id = #{@friend.id}"
+          flash[:notice] = t 'user.remove_friend.success', :name => @friend.display_name
+        else
+          flash[:error] = t 'user.remove_friend.not_a_friend', :name => @friend.display_name
+        end
+
+        if params[:referer]
+          redirect_to params[:referer]
+        else
+          redirect_to :controller => 'user', :action => 'view'
+        end
+      end
+    else
+      render_unknown_user params[:display_name]
+    end
+  end
+
+  ##
+  # sets a user's status
+  def set_status
+    @this_user.status = params[:status]
+    @this_user.save
+    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
+  end
+
+  ##
+  # delete a user, marking them as deleted and removing personal data
+  def delete
+    @this_user.delete
+    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
+  end
+
+  ##
+  # display a list of users matching specified criteria
+  def list
+    if request.post?
+      ids = params[:user].keys.collect { |id| id.to_i }
+
+      User.update_all("status = 'confirmed'", :id => ids) if params[:confirm]
+      User.update_all("status = 'deleted'", :id => ids) if params[:hide]
+
+      redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
+    else
+      conditions = Hash.new
+      conditions[:status] = params[:status] if params[:status]
+      conditions[:creation_ip] = params[:ip] if params[:ip]
+
+      @user_pages, @users = paginate(:users,
+                                     :conditions => conditions,
+                                     :order => :id,
+                                     :per_page => 50)
+    end
+  end
+
+private
+
+  ##
+  # handle password authentication
+  def password_authentication(username, password)
+    if user = User.authenticate(:username => username, :password => password)
+      successful_login(user)
+    elsif user = User.authenticate(:username => username, :password => password, :pending => true)
+      failed_login t('user.login.account not active', :reconfirm => url_for(:action => 'confirm_resend', :display_name => user.display_name))
+    elsif User.authenticate(:username => username, :password => password, :suspended => true)
+      failed_login t('user.login.account is suspended', :webmaster => "mailto:webmaster@openstreetmap.org")
+    else
+      failed_login t('user.login.auth failure')
+    end
+  end
+
+  ##
+  # handle OpenID authentication
+  def openid_authentication(openid_url)
+    # If we don't appear to have a user for this URL then ask the
+    # provider for some extra information to help with signup
+    if openid_url and User.find_by_openid_url(openid_url)
+      required = nil
+    else
+      required = [:nickname, :email, "http://axschema.org/namePerson/friendly", "http://axschema.org/contact/email"]
+    end
+
+    # Start the authentication
+    authenticate_with_open_id(openid_expand_url(openid_url), :method => :get, :required => required) do |result, identity_url, sreg, ax|
+      if result.successful?
+        # We need to use the openid url passed back from the OpenID provider
+        # rather than the one supplied by the user, as these can be different.
+        #
+        # For example, you can simply enter yahoo.com in the login box rather
+        # than a user specific url. Only once it comes back from the provider
+        # provider do we know the unique address for the user.
+        if user = User.find_by_openid_url(identity_url)
+          case user.status
+            when "pending" then
+              failed_login t('user.login.account not active', :reconfirm => url_for(:action => 'confirm_resend', :display_name => user.display_name))
+            when "active", "confirmed" then
+              successful_login(user)
+            when "suspended" then
+              failed_login t('user.login.account is suspended', :webmaster => "mailto:webmaster@openstreetmap.org")
+            else
+              failed_login t('user.login.auth failure')
+          end
+        else
+          # Guard against not getting any extension data
+          sreg = Hash.new if sreg.nil?
+          ax = Hash.new if ax.nil?
+
+          # We don't have a user registered to this OpenID, so redirect
+          # to the create account page with username and email filled
+          # in if they have been given by the OpenID provider through
+          # the simple registration protocol.
+          nickname = sreg["nickname"] || ax["http://axschema.org/namePerson/friendly"].first
+          email = sreg["email"] || ax["http://axschema.org/contact/email"].first
+
+          redirect_to :controller => 'user', :action => 'new', :nickname => nickname, :email => email, :openid => identity_url
+        end
+      elsif result.missing?
+        failed_login t('user.login.openid missing provider')
+      elsif result.invalid?
+        failed_login t('user.login.openid invalid')
+      else
+        failed_login t('user.login.auth failure')
+      end
+    end
+  end
+
+  ##
+  # verify an OpenID URL
+  def openid_verify(openid_url, user)
+    user.openid_url = openid_url
+
+    authenticate_with_open_id(openid_expand_url(openid_url), :method => :get, :required => [:email, "http://axschema.org/contact/email"]) do |result, identity_url, sreg, ax|
+      if result.successful?
+        # Do we trust the emails this provider returns?
+        if openid_email_verified(identity_url)
+          # Guard against not getting any extension data
+          sreg = Hash.new if sreg.nil?
+          ax = Hash.new if ax.nil?
+
+          # Get the verified email
+          verified_email = sreg["email"] || ax["http://axschema.org/contact/email"].first
+        end
+
+        # We need to use the openid url passed back from the OpenID provider
+        # rather than the one supplied by the user, as these can be different.
+        #
+        # For example, you can simply enter yahoo.com in the login box rather
+        # than a user specific url. Only once it comes back from the provider
+        # provider do we know the unique address for the user.
+        user.openid_url = identity_url
+        yield user, verified_email
+      elsif result.missing?
+        flash.now[:error] = t 'user.login.openid missing provider'
+      elsif result.invalid?
+        flash.now[:error] = t 'user.login.openid invalid'
+      else
+        flash.now[:error] = t 'user.login.auth failure'
+      end
+    end
+  end
+
+  ##
+  # special case some common OpenID providers by applying heuristics to
+  # try and come up with the correct URL based on what the user entered
+  def openid_expand_url(openid_url)
+    if openid_url.nil?
+      return nil
+    elsif openid_url.match(/(.*)gmail.com(\/?)$/) or openid_url.match(/(.*)googlemail.com(\/?)$/)
+      # Special case gmail.com as it is potentially a popular OpenID
+      # provider and, unlike yahoo.com, where it works automatically, Google
+      # have hidden their OpenID endpoint somewhere obscure this making it
+      # somewhat less user friendly.
+      return 'https://www.google.com/accounts/o8/id'
+    else
+      return openid_url
+    end
+  end
+
+  ##
+  # check if we trust an OpenID provider to return a verified
+  # email, so that we can skpi verifying it ourselves
+  def openid_email_verified(openid_url)
+    openid_url.match(/https:\/\/www.google.com\/accounts\/o8\/id?(.*)/) or
+    openid_url.match(/https:\/\/me.yahoo.com\/(.*)/)
+  end
+
+  ##
+  # process a successful login
+  def successful_login(user)
+    cookies.permanent["_osm_username"] = user.display_name
+
+    session[:user] = user.id
+    session_expires_after 28.days if session[:remember_me]
+
+    target = session[:referer] || url_for(:controller => :site, :action => :index)
+
+    # The user is logged in, so decide where to send them:
+    #
+    # - If they haven't seen the contributor terms, send them there.
+    # - If they have a block on them, show them that.
+    # - If they were referred to the login, send them back there.
+    # - Otherwise, send them to the home page.
+    if REQUIRE_TERMS_SEEN and not user.terms_seen
+      redirect_to :controller => :user, :action => :terms, :referer => target
+    elsif user.blocked_on_view
+      redirect_to user.blocked_on_view, :referer => target
+    else
+      redirect_to target
+    end
 
+    session.delete(:remember_me)
+    session.delete(:referer)
+  end
+
+  ##
+  # process a failed login
+  def failed_login(message)
+    flash[:error] = message
+
+    redirect_to :action => 'login', :referer =>  session[:referer]
+
+    session.delete(:remember_me)
+    session.delete(:referer)
+  end
+
+  ##
+  # update a user's details
+  def update_user(user, params)
+    user.display_name = params[:user][:display_name]
+    user.new_email = params[:user][:new_email]
+
+    if params[:user][:pass_crypt].length > 0 or params[:user][:pass_crypt_confirmation].length > 0
+      user.pass_crypt = params[:user][:pass_crypt]
+      user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
+    end
+
+    if params[:user][:description] != user.description
+      user.description = params[:user][:description]
+      user.description_format = "markdown"
+    end
+
+    user.languages = params[:user][:languages].split(",")
+
+    case params[:image_action]
+    when "new" then
+      user.image = params[:user][:image]
+      user.image_use_gravatar = false
+    when "delete" then
+      user.image = nil
+      user.image_use_gravatar = false
+    when "gravatar" then
+      user.image = nil
+      user.image_use_gravatar = true
+    end
+
+    user.home_lat = params[:user][:home_lat]
+    user.home_lon = params[:user][:home_lon]
+
+    if params[:user][:preferred_editor] == "default"
+      user.preferred_editor = nil
+    else
+      user.preferred_editor = params[:user][:preferred_editor]
+    end
+
+    user.openid_url = nil if params[:user][:openid_url].blank?
+
+    if user.save
+      set_locale
+
+      cookies.permanent["_osm_username"] = user.display_name
+
+      if user.new_email.blank?
+        flash.now[:notice] = t 'user.account.flash update success'
+      else
+        user.email = user.new_email
+
+        if user.valid?
+          flash.now[:notice] = t 'user.account.flash update success confirm needed'
+
+          begin
+            Notifier.email_confirm(user, user.tokens.create).deliver
+          rescue
+            # Ignore errors sending email
+          end
+        else
+          @user.errors.set(:new_email, @user.errors.get(:email))
+          @user.errors.set(:email, [])
+        end
+
+        user.reset_email!
+      end
+    end
+  end
+
+  ##
+  # require that the user is a administrator, or fill out a helpful error message
+  # and return them to the user page.
+  def require_administrator
+    if @user and not @user.administrator?
+      flash[:error] = t('user.filter.not_an_administrator')
+
+      if params[:display_name]
+        redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name]
+      else
+        redirect_to :controller => 'user', :action => 'login', :referer => request.fullpath
+      end
+    elsif not @user
+      redirect_to :controller => 'user', :action => 'login', :referer => request.fullpath
+    end
+  end
+
+  ##
+  # ensure that there is a "this_user" instance variable
+  def lookup_user_by_id
+    @this_user = User.find(params[:id])
+  end
+
+  ##
+  # ensure that there is a "this_user" instance variable
+  def lookup_user_by_name
+    @this_user = User.find_by_display_name(params[:display_name])
+  rescue ActiveRecord::RecordNotFound
+    redirect_to :controller => 'user', :action => 'view', :display_name => params[:display_name] unless @this_user
+  end
+
+  ##
+  # Choose the layout to use. See
+  # https://rails.lighthouseapp.com/projects/8994/tickets/5371-layout-with-onlyexcept-options-makes-other-actions-render-without-layouts
+  def choose_layout
+    oauth_url = url_for(:controller => :oauth, :action => :authorize, :only_path => true)
+
+    if [ 'api_details' ].include? action_name
+      nil
+    elsif params[:referer] and URI.parse(params[:referer]).path == oauth_url
+      'slim'
+    else
+      'site'
+    end
+  end
+
+  ##
+  #
+  def disable_terms_redirect
+    # this is necessary otherwise going to the user terms page, when
+    # having not agreed already would cause an infinite redirect loop.
+    # it's .now so that this doesn't propagate to other pages.
+    flash.now[:skip_terms] = true
+  end
+end