Merge pull request #4887 from AntonKhorev/full-encode-wikipedia-value

[rails.git] / app / models / user.rb

diff --git a/app/models/user.rb b/app/models/user.rb
index 0b2a902dfac734f71d18c183cefe5863e579bbe1..4241a9e5687b0e4d71876794dd3fd41e6aacb2f1 100644 (file)
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,213 +1,465 @@
-class User < ActiveRecord::Base
-  require 'xml/libxml'
-
-  has_many :traces, :conditions => { :visible => true }
-  has_many :diary_entries, :order => 'created_at DESC'
-  has_many :diary_comments, :order => 'created_at DESC'
-  has_many :messages, :foreign_key => :to_user_id, :conditions => { :to_user_visible => true }, :order => 'sent_on DESC'
-  has_many :new_messages, :class_name => "Message", :foreign_key => :to_user_id, :conditions => { :to_user_visible => true, :message_read => false }, :order => 'sent_on DESC'
-  has_many :sent_messages, :class_name => "Message", :foreign_key => :from_user_id, :conditions => { :from_user_visible => true }, :order => 'sent_on DESC'
-  has_many :friends, :include => :befriendee, :conditions => "users.status IN ('active', 'confirmed')"
-  has_many :tokens, :class_name => "UserToken"
+# == Schema Information
+#
+# Table name: users
+#
+#  email                :string           not null
+#  id                   :bigint(8)        not null, primary key
+#  pass_crypt           :string           not null
+#  creation_time        :datetime         not null
+#  display_name         :string           default(""), not null
+#  data_public          :boolean          default(FALSE), not null
+#  description          :text             default(""), not null
+#  home_lat             :float
+#  home_lon             :float
+#  home_zoom            :integer          default(3)
+#  pass_salt            :string
+#  email_valid          :boolean          default(FALSE), not null
+#  new_email            :string
+#  creation_ip          :string
+#  languages            :string
+#  status               :enum             default("pending"), not null
+#  terms_agreed         :datetime
+#  consider_pd          :boolean          default(FALSE), not null
+#  auth_uid             :string
+#  preferred_editor     :string
+#  terms_seen           :boolean          default(FALSE), not null
+#  description_format   :enum             default("markdown"), not null
+#  changesets_count     :integer          default(0), not null
+#  traces_count         :integer          default(0), not null
+#  diary_entries_count  :integer          default(0), not null
+#  image_use_gravatar   :boolean          default(FALSE), not null
+#  auth_provider        :string
+#  home_tile            :bigint(8)
+#  tou_agreed           :datetime
+#  diary_comments_count :integer          default(0)
+#  note_comments_count  :integer          default(0)
+#
+# Indexes
+#
+#  users_auth_idx                    (auth_provider,auth_uid) UNIQUE
+#  users_display_name_canonical_idx  (lower(NORMALIZE(display_name, NFKC)))
+#  users_display_name_idx            (display_name) UNIQUE
+#  users_email_idx                   (email) UNIQUE
+#  users_email_lower_idx             (lower((email)::text))
+#  users_home_idx                    (home_tile)
+#
+
+class User < ApplicationRecord
+  require "digest"
+  include AASM
+
+  has_many :traces, -> { where(:visible => true) }
+  has_many :diary_entries, -> { order(:created_at => :desc) }, :inverse_of => :user
+  has_many :diary_comments, -> { order(:created_at => :desc) }, :inverse_of => :user
+  has_many :diary_entry_subscriptions, :class_name => "DiaryEntrySubscription"
+  has_many :diary_subscriptions, :through => :diary_entry_subscriptions, :source => :diary_entry
+  has_many :messages, -> { where(:to_user_visible => true, :muted => false).order(:sent_on => :desc).preload(:sender, :recipient) }, :foreign_key => :to_user_id
+  has_many :new_messages, -> { where(:to_user_visible => true, :muted => false, :message_read => false).order(:sent_on => :desc) }, :class_name => "Message", :foreign_key => :to_user_id
+  has_many :sent_messages, -> { where(:from_user_visible => true).order(:sent_on => :desc).preload(:sender, :recipient) }, :class_name => "Message", :foreign_key => :from_user_id
+  has_many :muted_messages, -> { where(:to_user_visible => true, :muted => true).order(:sent_on => :desc).preload(:sender, :recipient) }, :class_name => "Message", :foreign_key => :to_user_id
+  has_many :friendships, -> { joins(:befriendee).where(:users => { :status => %w[active confirmed] }) }
+  has_many :friends, :through => :friendships, :source => :befriendee

   has_many :preferences, :class_name => "UserPreference"
   has_many :preferences, :class_name => "UserPreference"

-  has_many :changesets, :order => 'created_at DESC'
+  has_many :changesets, -> { order(:created_at => :desc) }, :inverse_of => :user
+  has_many :changeset_comments, :foreign_key => :author_id, :inverse_of => :author
+  has_and_belongs_to_many :changeset_subscriptions, :class_name => "Changeset", :join_table => "changesets_subscribers", :foreign_key => "subscriber_id"
+  has_many :note_comments, :foreign_key => :author_id, :inverse_of => :author
+  has_many :notes, :through => :note_comments

 
   has_many :client_applications
 
   has_many :client_applications

-  has_many :oauth_tokens, :class_name => "OauthToken", :order => "authorized_at desc", :include => [:client_application]
+  has_many :oauth_tokens, -> { order(:authorized_at => :desc).preload(:client_application) }, :class_name => "OauthToken", :inverse_of => :user
+
+  has_many :oauth2_applications, :class_name => Doorkeeper.config.application_model.name, :as => :owner
+  has_many :access_grants, :class_name => Doorkeeper.config.access_grant_model.name, :foreign_key => :resource_owner_id
+  has_many :access_tokens, :class_name => Doorkeeper.config.access_token_model.name, :foreign_key => :resource_owner_id
+
+  has_many :blocks, :class_name => "UserBlock"
+  has_many :blocks_created, :class_name => "UserBlock", :foreign_key => :creator_id, :inverse_of => :creator
+  has_many :blocks_revoked, :class_name => "UserBlock", :foreign_key => :revoker_id, :inverse_of => :revoker
+
+  has_many :mutes, -> { order(:created_at => :desc) }, :class_name => "UserMute", :foreign_key => :owner_id, :inverse_of => :owner
+  has_many :muted_users, :through => :mutes, :source => :subject

 
 

-  has_many :active_blocks, :class_name => "UserBlock", :conditions => ['user_blocks.ends_at > \'#{Time.now.getutc.xmlschema(5)}\' or user_blocks.needs_view']

   has_many :roles, :class_name => "UserRole"
 
   has_many :roles, :class_name => "UserRole"
 

-  validates_presence_of :email, :display_name
-  validates_confirmation_of :email#, :message => ' addresses must match'
-  validates_confirmation_of :pass_crypt#, :message => ' must match the confirmation password'
-  validates_uniqueness_of :display_name, :allow_nil => true
-  validates_uniqueness_of :email
-  validates_uniqueness_of :openid_url, :allow_nil => true
-  validates_length_of :pass_crypt, :within => 8..255
-  validates_length_of :display_name, :within => 3..255, :allow_nil => true
-  validates_email_format_of :email, :if => Proc.new { |u| u.email_changed? }
-  validates_email_format_of :new_email, :allow_blank => true, :if => Proc.new { |u| u.new_email_changed? }
-  validates_format_of :display_name, :with => /^[^\/;.,?]*$/, :if => Proc.new { |u| u.display_name_changed? }
-  validates_format_of :display_name, :with => /^\S/, :message => "has leading whitespace", :if => Proc.new { |u| u.display_name_changed? }
-  validates_format_of :display_name, :with => /\S$/, :message => "has trailing whitespace", :if => Proc.new { |u| u.display_name_changed? }
-  validates_numericality_of :home_lat, :allow_nil => true
-  validates_numericality_of :home_lon, :allow_nil => true
-  validates_numericality_of :home_zoom, :only_integer => true, :allow_nil => true
-  validates_inclusion_of :preferred_editor, :in => Editors::ALL_EDITORS, :allow_nil => true
+  has_many :issues, :class_name => "Issue", :foreign_key => :reported_user_id, :inverse_of => :reported_user
+  has_many :issue_comments
+
+  has_many :reports
+
+  scope :visible, -> { where(:status => %w[pending active confirmed]) }
+  scope :active, -> { where(:status => %w[active confirmed]) }
+  scope :identifiable, -> { where(:data_public => true) }
+
+  has_one_attached :avatar, :service => Settings.avatar_storage
+
+  validates :display_name, :presence => true, :length => 3..255,
+                           :exclusion => %w[new terms save confirm confirm-email go_public reset-password forgot-password suspended]
+  validates :display_name, :if => proc { |u| u.display_name_changed? },
+                           :normalized_uniqueness => { :case_sensitive => false }
+  validates :display_name, :if => proc { |u| u.display_name_changed? },
+                           :characters => { :url_safe => true },
+                           :whitespace => { :leading => false, :trailing => false },
+                           :width => { :minimum => 3 }
+  validate :display_name_cannot_be_user_id_with_other_id, :if => proc { |u| u.display_name_changed? }
+  validates :email, :presence => true, :characters => true
+  validates :email, :if => proc { |u| u.email_changed? },
+                    :uniqueness => { :case_sensitive => false }
+  validates :email, :if => proc { |u| u.email_changed? },
+                    :whitespace => { :leading => false, :trailing => false }
+  validates :pass_crypt, :confirmation => true, :length => 8..255
+  validates :home_lat, :allow_nil => true, :numericality => true, :inclusion => { :in => -90..90 }
+  validates :home_lon, :allow_nil => true, :numericality => true, :inclusion => { :in => -180..180 }
+  validates :home_zoom, :allow_nil => true, :numericality => { :only_integer => true }
+  validates :preferred_editor, :inclusion => Editors::ALL_EDITORS, :allow_nil => true
+  validates :auth_uid, :unless => proc { |u| u.auth_provider.nil? },
+                       :uniqueness => { :scope => :auth_provider }
+  validates :avatar, :if => proc { |u| u.attachment_changes["avatar"] },
+                     :image => true
+
+  validates_email_format_of :email, :if => proc { |u| u.email_changed? }
+  validates_email_format_of :new_email, :allow_blank => true, :if => proc { |u| u.new_email_changed? }
+
+  alias_attribute :created_at, :creation_time

 
   before_save :encrypt_password
 
   before_save :encrypt_password

+  before_save :update_tile
+  after_save :spam_check

 
 

-  file_column :image, :magick => { :geometry => "100x100>" }
+  generates_token_for :new_user, :expires_in => 1.week do
+    fingerprint
+  end

 
 

-  def after_initialize
-    self.creation_time = Time.now.getutc unless self.attribute_present?(:creation_time)
+  generates_token_for :new_email, :expires_in => 1.week do
+    fingerprint

   end
 
   end
 

-  def encrypt_password
-    if pass_crypt_confirmation
-      self.pass_salt = OSM::make_token(8)
-      self.pass_crypt = OSM::encrypt_password(pass_crypt, pass_salt)
+  generates_token_for :password_reset, :expires_in => 1.week do
+    fingerprint
+  end
+
+  def display_name_cannot_be_user_id_with_other_id
+    display_name&.match(/^user_(\d+)$/i) do |m|
+      errors.add :display_name, I18n.t("activerecord.errors.messages.display_name_is_user_n") unless m[1].to_i == id

     end
   end
 
     end
   end
 

+  def to_param
+    display_name
+  end
+

   def self.authenticate(options)
   def self.authenticate(options)

-    if options[:username] and options[:password]
-      user = find(:first, :conditions => ["email = ? OR display_name = ?", options[:username], options[:username]])
-      user = nil if user and user.pass_crypt != OSM::encrypt_password(options[:password], user.pass_salt)
-    elsif options[:token]
-      token = UserToken.find(:first, :include => :user, :conditions => ["user_tokens.token = ?", options[:token]])
-      user = token.user if token
-    end
-
-    if user and
-      ( user.status == "deleted" or
-        ( user.status == "pending" and not options[:pending] ) or
-        ( user.status == "suspended" and not options[:suspended] ) )
+    if options[:username] && options[:password]
+      user = find_by("email = ? OR display_name = ?", options[:username].strip, options[:username])
+
+      if user.nil?
+        users = where("LOWER(email) = LOWER(?) OR LOWER(NORMALIZE(display_name, NFKC)) = LOWER(NORMALIZE(?, NFKC))", options[:username].strip, options[:username])
+
+        user = users.first if users.count == 1
+      end
+
+      if user && PasswordHash.check(user.pass_crypt, user.pass_salt, options[:password])
+        if PasswordHash.upgrade?(user.pass_crypt, user.pass_salt)
+          user.pass_crypt, user.pass_salt = PasswordHash.create(options[:password])
+          user.save
+        end
+      else
+        user = nil
+      end
+    end
+
+    if user &&
+       (user.status == "deleted" ||
+         (user.status == "pending" && !options[:pending]) ||
+         (user.status == "suspended" && !options[:suspended]))

       user = nil
     end
 
       user = nil
     end
 

-    token.update_attribute(:expiry, 1.week.from_now) if token and user
+    user
+  end

 
 

-    return user
-  end 
+  aasm :column => :status, :no_direct_assignment => true do
+    state :pending, :initial => true
+    state :active
+    state :confirmed
+    state :suspended
+    state :deleted

 
 

-  def to_xml
-    doc = OSM::API.new.get_xml_doc
-    doc.root << to_xml_node()
-    return doc
-  end
+    # A normal account is active
+    event :activate do
+      transitions :from => :pending, :to => :active
+    end

 
 

-  def to_xml_node
-    el1 = XML::Node.new 'user'
-    el1['display_name'] = self.display_name.to_s
-    el1['account_created'] = self.creation_time.xmlschema
-    if self.home_lat and self.home_lon
-      home = XML::Node.new 'home'
-      home['lat'] = self.home_lat.to_s
-      home['lon'] = self.home_lon.to_s
-      home['zoom'] = self.home_zoom.to_s
-      el1 << home
+    # Used in test suite, not something that we would normally need to do.
+    if Rails.env.test?
+      event :deactivate do
+        transitions :from => :active, :to => :pending
+      end

     end
     end

-    return el1
+
+    # To confirm an account is used to override the spam scoring
+    event :confirm do
+      transitions :from => [:pending, :active, :suspended], :to => :confirmed
+    end
+
+    # To unconfirm an account is to make it subject to future spam scoring again
+    event :unconfirm do
+      transitions :from => :confirmed, :to => :active
+    end
+
+    # Accounts can be automatically suspended by spam_check
+    event :suspend do
+      transitions :from => [:pending, :active], :to => :suspended
+    end
+
+    # Unsuspending an account moves it back to active without overriding the spam scoring
+    event :unsuspend do
+      transitions :from => :suspended, :to => :active
+    end
+
+    # Mark the account as deleted but keep all data intact
+    event :hide do
+      transitions :from => [:pending, :active, :confirmed, :suspended], :to => :deleted
+    end
+
+    event :unhide do
+      transitions :from => [:deleted], :to => :active
+    end
+
+    # Mark the account as deleted and remove personal data
+    event :soft_destroy do
+      before do
+        revoke_authentication_tokens
+        remove_personal_data
+      end
+
+      transitions :from => [:pending, :active, :confirmed, :suspended], :to => :deleted
+    end
+  end
+
+  def description
+    RichText.new(self[:description_format], self[:description])

   end
 
   def languages
   end
 
   def languages

-    attribute_present?(:languages) ? read_attribute(:languages).split(/ *, */) : []
+    attribute_present?(:languages) ? self[:languages].split(/ *[, ] */) : []

   end
 
   def languages=(languages)
   end
 
   def languages=(languages)

-    write_attribute(:languages, languages.join(","))
+    self[:languages] = languages.join(",")

   end
 
   def preferred_language
   end
 
   def preferred_language

-    languages.find { |l| Language.find(:first, :conditions => { :code => l }) }
+    languages.find { |l| Language.exists?(:code => l) }
+  end
+
+  def preferred_languages
+    @preferred_languages ||= Locale.list(languages)

   end
 
   end
 

-  def preferred_language_from(array)
-    (languages & array.collect { |i| i.to_s }).first
+  def home_location?
+    home_lat && home_lon

   end
 
   end
 

-  def nearby(radius = NEARBY_RADIUS, num = NEARBY_USERS)
-    if self.home_lon and self.home_lat 
-      gc = OSM::GreatCircle.new(self.home_lat, self.home_lon)
-      bounds = gc.bounds(radius)
+  def nearby(radius = Settings.nearby_radius, num = Settings.nearby_users)
+    if home_location?
+      gc = OSM::GreatCircle.new(home_lat, home_lon)
+      sql_for_area = QuadTile.sql_for_area(gc.bounds(radius), "home_")

       sql_for_distance = gc.sql_for_distance("home_lat", "home_lon")
       sql_for_distance = gc.sql_for_distance("home_lat", "home_lon")

-      nearby = User.find(:all, 
-                         :conditions => ["id != ? AND status IN (\'active\', \'confirmed\') AND data_public = ? AND #{sql_for_distance} <= ?", id, true, radius],
-                         :order => sql_for_distance, :limit => num)
+      nearby = User.active.identifiable
+                   .where.not(:id => id)
+                   .where(sql_for_area)
+                   .where("#{sql_for_distance} <= ?", radius)
+                   .order(Arel.sql(sql_for_distance))
+                   .limit(num)

     else
       nearby = []
     end
     else
       nearby = []
     end

-    return nearby
+    nearby

   end
 
   def distance(nearby_user)
   end
 
   def distance(nearby_user)

-    return OSM::GreatCircle.new(self.home_lat, self.home_lon).distance(nearby_user.home_lat, nearby_user.home_lon)
+    OSM::GreatCircle.new(home_lat, home_lon).distance(nearby_user.home_lat, nearby_user.home_lon)

   end
 
   end
 

-  def is_friends_with?(new_friend)
-    res = false
-    @new_friend = new_friend
-    self.friends.each do |friend|
-      if friend.friend_user_id == @new_friend.id
-        return true
-      end
-    end
-    return false
+  def friends_with?(new_friend)
+    friendships.exists?(:befriendee => new_friend)

   end
 
   ##
   # returns true if a user is visible
   def visible?
   end
 
   ##
   # returns true if a user is visible
   def visible?

-    ["pending","active","confirmed"].include? self.status
+    %w[pending active confirmed].include? status

   end
 
   ##
   # returns true if a user is active
   def active?
   end
 
   ##
   # returns true if a user is active
   def active?

-    ["active","confirmed"].include? self.status
+    %w[active confirmed].include? status

   end
 
   ##
   # returns true if the user has the moderator role, false otherwise
   def moderator?
   end
 
   ##
   # returns true if the user has the moderator role, false otherwise
   def moderator?

-    has_role? 'moderator'
+    role? "moderator"

   end
 
   ##
   # returns true if the user has the administrator role, false otherwise
   def administrator?
   end
 
   ##
   # returns true if the user has the administrator role, false otherwise
   def administrator?

-    has_role? 'administrator'
+    role? "administrator"
+  end
+
+  ##
+  # returns true if the user has the importer role, false otherwise
+  def importer?
+    role? "importer"

   end
 
   ##
   # returns true if the user has the requested role
   end
 
   ##
   # returns true if the user has the requested role

-  def has_role?(role)
+  def role?(role)

     roles.any? { |r| r.role == role }
   end
 
   ##
     roles.any? { |r| r.role == role }
   end
 
   ##

-  # returns the first active block which would require users to view 
+  # returns the first active block which would require users to view

   # a message, or nil if there are none.
   def blocked_on_view
   # a message, or nil if there are none.
   def blocked_on_view

-    active_blocks.detect { |b| b.needs_view? }
+    blocks.active.detect(&:needs_view?)

   end
 
   ##
   end
 
   ##

-  # delete a user - leave the account but purge most personal data
-  def delete
-    self.display_name = "user_#{self.id}"
+  # revoke any authentication tokens
+  def revoke_authentication_tokens
+    oauth_tokens.authorized.each(&:invalidate!)
+    access_tokens.not_expired.each(&:revoke)
+  end
+
+  ##
+  # remove personal data - leave the account but purge most personal data
+  def remove_personal_data
+    avatar.purge_later
+
+    self.display_name = "user_#{id}"

     self.description = ""
     self.home_lat = nil
     self.home_lon = nil
     self.description = ""
     self.home_lat = nil
     self.home_lon = nil

-    self.image = nil

     self.email_valid = false
     self.new_email = nil
     self.email_valid = false
     self.new_email = nil

-    self.status = "deleted"
-    self.save
+    self.auth_provider = nil
+    self.auth_uid = nil
+
+    save

   end
 
   ##
   # return a spam score for a user
   def spam_score
   end
 
   ##
   # return a spam score for a user
   def spam_score

-    changeset_score = self.changesets.find(:all, :limit => 10).length * 50
-    trace_score = self.traces.find(:all, :limit => 10).length * 50
-    diary_entry_score = self.diary_entries.inject(0) { |s,e| s += OSM.spam_score(e.body) }
-    diary_comment_score = self.diary_comments.inject(0) { |s,e| s += OSM.spam_score(e.body) }
-
-    score = OSM.spam_score(self.description) * 2
-    score += diary_entry_score / self.diary_entries.length if self.diary_entries.length > 0
-    score += diary_comment_score / self.diary_comments.length if self.diary_comments.length > 0
+    changeset_score = changesets.size * 50
+    trace_score = traces.size * 50
+    diary_entry_score = diary_entries.visible.inject(0) { |acc, elem| acc + elem.body.spam_score }
+    diary_comment_score = diary_comments.visible.inject(0) { |acc, elem| acc + elem.body.spam_score }
+
+    score = description.spam_score / 4.0
+    score += diary_entries.visible.where("created_at > ?", 1.day.ago).count * 10
+    score += diary_entry_score / diary_entries.visible.length unless diary_entries.visible.empty?
+    score += diary_comment_score / diary_comments.visible.length unless diary_comments.visible.empty?

     score -= changeset_score
     score -= trace_score
 
     score -= changeset_score
     score -= trace_score
 

-    return score.to_i
+    score.to_i

   end
 
   ##
   end
 
   ##

-  # return an oauth access token for a specified application
+  # perform a spam check on a user
+  def spam_check
+    suspend! if may_suspend? && spam_score > Settings.spam_threshold
+  end
+
+  ##
+  # return an oauth 1 access token for a specified application

   def access_token(application_key)
   def access_token(application_key)

-    return ClientApplication.find_by_key(application_key).access_token_for_user(self)
+    ClientApplication.find_by(:key => application_key).access_token_for_user(self)
+  end
+
+  ##
+  # return an oauth 2 access token for a specified application
+  def oauth_token(application_id)
+    application = Doorkeeper.config.application_model.find_by(:uid => application_id)
+
+    Doorkeeper.config.access_token_model.find_or_create_for(
+      :application => application,
+      :resource_owner => self,
+      :scopes => application.scopes
+    )
+  end
+
+  def fingerprint
+    digest = Digest::SHA256.new
+    digest.update(email)
+    digest.update(pass_crypt)
+    digest.hexdigest
+  end
+
+  def active_reports
+    issues
+      .with_status(:open)
+      .joins(:reports)
+      .where("reports.updated_at >= COALESCE(issues.resolved_at, '1970-01-01')")
+      .count
+  end
+
+  def max_messages_per_hour
+    account_age_in_seconds = Time.now.utc - created_at
+    account_age_in_hours = account_age_in_seconds / 3600
+    recent_messages = messages.where(:sent_on => Time.now.utc - 3600..).count
+    max_messages = account_age_in_hours.ceil + recent_messages - (active_reports * 10)
+    max_messages.clamp(0, Settings.max_messages_per_hour)
+  end
+
+  def max_friends_per_hour
+    account_age_in_seconds = Time.now.utc - created_at
+    account_age_in_hours = account_age_in_seconds / 3600
+    recent_friends = Friendship.where(:befriendee => self).where(:created_at => Time.now.utc - 3600..).count
+    max_friends = account_age_in_hours.ceil + recent_friends - (active_reports * 10)
+    max_friends.clamp(0, Settings.max_friends_per_hour)
+  end
+
+  def max_changeset_comments_per_hour
+    if moderator?
+      Settings.moderator_changeset_comments_per_hour
+    else
+      previous_comments = changeset_comments.limit(200).count
+      max_comments = previous_comments / 200.0 * Settings.max_changeset_comments_per_hour
+      max_comments = max_comments.floor.clamp(Settings.initial_changeset_comments_per_hour, Settings.max_changeset_comments_per_hour)
+      max_comments /= 2**active_reports
+      max_comments.floor.clamp(Settings.min_changeset_comments_per_hour, Settings.max_changeset_comments_per_hour)
+    end
+  end
+
+  def deletion_allowed_at
+    unless Settings.user_account_deletion_delay.nil?
+      last_changeset = changesets.reorder(:closed_at => :desc).first
+      return last_changeset.closed_at.utc + Settings.user_account_deletion_delay.hours if last_changeset
+    end
+    creation_time.utc
+  end
+
+  def deletion_allowed?
+    deletion_allowed_at <= Time.now.utc
+  end
+
+  private
+
+  def encrypt_password
+    if pass_crypt_confirmation
+      self.pass_crypt, self.pass_salt = PasswordHash.create(pass_crypt)
+      self.pass_crypt_confirmation = nil
+    end
+  end
+
+  def update_tile
+    self.home_tile = QuadTile.tile_for_point(home_lat, home_lon) if home_location?

   end
 end
   end
 end