jro_apps/redmine Commit - r13902:b688214ce038

Column 'address' in where clause may be ambiguous (#19485)....

Jean-Philippe Lang -

r13902:b688214ce038

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r13902:b688214ce038

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app/models/user.rb +1 -1

              # Redmine - project management software
              # Copyright (C) 2006-2015  Jean-Philippe Lang
              #
              # This program is free software; you can redistribute it and/or
              # modify it under the terms of the GNU General Public License
              # as published by the Free Software Foundation; either version 2
              # of the License, or (at your option) any later version.
              #
              # This program is distributed in the hope that it will be useful,
              # but WITHOUT ANY WARRANTY; without even the implied warranty of
              # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
              # GNU General Public License for more details.
              #
              # You should have received a copy of the GNU General Public License
              # along with this program; if not, write to the Free Software
              # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
              require "digest/sha1"
              class User < Principal
                include Redmine::SafeAttributes
                # Different ways of displaying/sorting users
                USER_FORMATS = {
                  :firstname_lastname => {
                      :string => '#{firstname} #{lastname}',
                      :order => %w(firstname lastname id),
                      :setting_order => 1
                    },
                  :firstname_lastinitial => {
                      :string => '#{firstname} #{lastname.to_s.chars.first}.',
                      :order => %w(firstname lastname id),
                      :setting_order => 2
                    },
                  :firstinitial_lastname => {
                      :string => '#{firstname.to_s.gsub(/(([[:alpha:]])[[:alpha:]]*\.?)/, \'\2.\')} #{lastname}',
                      :order => %w(firstname lastname id),
                      :setting_order => 2
                    },
                  :firstname => {
                      :string => '#{firstname}',
                      :order => %w(firstname id),
                      :setting_order => 3
                    },
                  :lastname_firstname => {
                      :string => '#{lastname} #{firstname}',
                      :order => %w(lastname firstname id),
                      :setting_order => 4
                    },
                  :lastname_coma_firstname => {
                      :string => '#{lastname}, #{firstname}',
                      :order => %w(lastname firstname id),
                      :setting_order => 5
                    },
                  :lastname => {
                      :string => '#{lastname}',
                      :order => %w(lastname id),
                      :setting_order => 6
                    },
                  :username => {
                      :string => '#{login}',
                      :order => %w(login id),
                      :setting_order => 7
                    },
                }
                MAIL_NOTIFICATION_OPTIONS = [
                  ['all', :label_user_mail_option_all],
                  ['selected', :label_user_mail_option_selected],
                  ['only_my_events', :label_user_mail_option_only_my_events],
                  ['only_assigned', :label_user_mail_option_only_assigned],
                  ['only_owner', :label_user_mail_option_only_owner],
                  ['none', :label_user_mail_option_none]
                ]
                has_and_belongs_to_many :groups,
                                        :join_table   => "#{table_name_prefix}groups_users#{table_name_suffix}",
                                        :after_add    => Proc.new {|user, group| group.user_added(user)},
                                        :after_remove => Proc.new {|user, group| group.user_removed(user)}
                has_many :changesets, :dependent => :nullify
                has_one :preference, :dependent => :destroy, :class_name => 'UserPreference'
                has_one :rss_token, lambda {where "action='feeds'"}, :class_name => 'Token'
                has_one :api_token, lambda {where "action='api'"}, :class_name => 'Token'
                has_one :email_address, lambda {where :is_default => true}, :autosave => true
                has_many :email_addresses, :dependent => :delete_all
                belongs_to :auth_source
                scope :logged, lambda { where("#{User.table_name}.status <> #{STATUS_ANONYMOUS}") }
                scope :status, lambda {|arg| where(arg.blank? ? nil : {:status => arg.to_i}) }
                acts_as_customizable
                attr_accessor :password, :password_confirmation, :generate_password
                attr_accessor :last_before_login_on
                # Prevents unauthorized assignments
                attr_protected :login, :admin, :password, :password_confirmation, :hashed_password
                LOGIN_LENGTH_LIMIT = 60
                MAIL_LENGTH_LIMIT = 60
                validates_presence_of :login, :firstname, :lastname, :if => Proc.new { |user| !user.is_a?(AnonymousUser) }
                validates_uniqueness_of :login, :if => Proc.new { |user| user.login_changed? && user.login.present? }, :case_sensitive => false
                # Login must contain letters, numbers, underscores only
                validates_format_of :login, :with => /\A[a-z0-9_\-@\.]*\z/i
                validates_length_of :login, :maximum => LOGIN_LENGTH_LIMIT
                validates_length_of :firstname, :lastname, :maximum => 30
                validates_inclusion_of :mail_notification, :in => MAIL_NOTIFICATION_OPTIONS.collect(&:first), :allow_blank => true
                validate :validate_password_length
                validate do
                  if password_confirmation && password != password_confirmation
                    errors.add(:password, :confirmation)
                  end
                end
                before_validation :instantiate_email_address
                before_create :set_mail_notification
                before_save   :generate_password_if_needed, :update_hashed_password
                before_destroy :remove_references_before_destroy
                after_save :update_notified_project_ids, :destroy_tokens
                scope :in_group, lambda {|group|
                  group_id = group.is_a?(Group) ? group.id : group.to_i
                  where("#{User.table_name}.id IN (SELECT gu.user_id FROM #{table_name_prefix}groups_users#{table_name_suffix} gu WHERE gu.group_id = ?)", group_id)
                }
                scope :not_in_group, lambda {|group|
                  group_id = group.is_a?(Group) ? group.id : group.to_i
                  where("#{User.table_name}.id NOT IN (SELECT gu.user_id FROM #{table_name_prefix}groups_users#{table_name_suffix} gu WHERE gu.group_id = ?)", group_id)
                }
                scope :sorted, lambda { order(*User.fields_for_order_statement)}
                scope :having_mail, lambda {|arg|
                  addresses = Array.wrap(arg).map {|a| a.to_s.downcase}
                  if addresses.any?
-                   joins(:email_addresses).where("LOWER(address) IN (?)", addresses).uniq
+                   joins(:email_addresses).where("LOWER(#{EmailAddress.table_name}.address) IN (?)", addresses).uniq
                  else
                    none
                  end
                }
                def set_mail_notification
                  self.mail_notification = Setting.default_notification_option if self.mail_notification.blank?
                  true
                end
                def update_hashed_password
                  # update hashed_password if password was set
                  if self.password && self.auth_source_id.blank?
                    salt_password(password)
                  end
                end
                alias :base_reload :reload
                def reload(*args)
                  @name = nil
                  @projects_by_role = nil
                  @membership_by_project_id = nil
                  @notified_projects_ids = nil
                  @notified_projects_ids_changed = false
                  @builtin_role = nil
                  @visible_project_ids = nil
                  base_reload(*args)
                end
                def mail
                  email_address.try(:address)
                end
                def mail=(arg)
                  email = email_address || build_email_address
                  email.address = arg
                end
                def mail_changed?
                  email_address.try(:address_changed?)
                end
                def mails
                  email_addresses.pluck(:address)
                end
                def self.find_or_initialize_by_identity_url(url)
                  user = where(:identity_url => url).first
                  unless user
                    user = User.new
                    user.identity_url = url
                  end
                  user
                end
                def identity_url=(url)
                  if url.blank?
                    write_attribute(:identity_url, '')
                  else
                    begin
                      write_attribute(:identity_url, OpenIdAuthentication.normalize_identifier(url))
                    rescue OpenIdAuthentication::InvalidOpenId
                      # Invalid url, don't save
                    end
                  end
                  self.read_attribute(:identity_url)
                end
                # Returns the user that matches provided login and password, or nil
                def self.try_to_login(login, password, active_only=true)
                  login = login.to_s
                  password = password.to_s
                  # Make sure no one can sign in with an empty login or password
                  return nil if login.empty? || password.empty?
                  user = find_by_login(login)
                  if user
                    # user is already in local database
                    return nil unless user.check_password?(password)
                    return nil if !user.active? && active_only
                  else
                    # user is not yet registered, try to authenticate with available sources
                    attrs = AuthSource.authenticate(login, password)
                    if attrs
                      user = new(attrs)
                      user.login = login
                      user.language = Setting.default_language
                      if user.save
                        user.reload
                        logger.info("User '#{user.login}' created from external auth source: #{user.auth_source.type} - #{user.auth_source.name}") if logger && user.auth_source
                      end
                    end
                  end
                  user.update_column(:last_login_on, Time.now) if user && !user.new_record? && user.active?
                  user
                rescue => text
                  raise text
                end
                # Returns the user who matches the given autologin +key+ or nil
                def self.try_to_autologin(key)
                  user = Token.find_active_user('autologin', key, Setting.autologin.to_i)
                  if user
                    user.update_column(:last_login_on, Time.now)
                    user
                  end
                end
                def self.name_formatter(formatter = nil)
                  USER_FORMATS[formatter || Setting.user_format] || USER_FORMATS[:firstname_lastname]
                end
                # Returns an array of fields names than can be used to make an order statement for users
                # according to how user names are displayed
                # Examples:
                #
                #   User.fields_for_order_statement              => ['users.login', 'users.id']
                #   User.fields_for_order_statement('authors')   => ['authors.login', 'authors.id']
                def self.fields_for_order_statement(table=nil)
                  table ||= table_name
                  name_formatter[:order].map {|field| "#{table}.#{field}"}
                end
                # Return user's full name for display
                def name(formatter = nil)
                  f = self.class.name_formatter(formatter)
                  if formatter
                    eval('"' + f[:string] + '"')
                  else
                    @name ||= eval('"' + f[:string] + '"')
                  end
                end
                def active?
                  self.status == STATUS_ACTIVE
                end
                def registered?
                  self.status == STATUS_REGISTERED
                end
                def locked?
                  self.status == STATUS_LOCKED
                end
                def activate
                  self.status = STATUS_ACTIVE
                end
                def register
                  self.status = STATUS_REGISTERED
                end
                def lock
                  self.status = STATUS_LOCKED
                end
                def activate!
                  update_attribute(:status, STATUS_ACTIVE)
                end
                def register!
                  update_attribute(:status, STATUS_REGISTERED)
                end
                def lock!
                  update_attribute(:status, STATUS_LOCKED)
                end
                # Returns true if +clear_password+ is the correct user's password, otherwise false
                def check_password?(clear_password)
                  if auth_source_id.present?
                    auth_source.authenticate(self.login, clear_password)
                  else
                    User.hash_password("#{salt}#{User.hash_password clear_password}") == hashed_password
                  end
                end
                # Generates a random salt and computes hashed_password for +clear_password+
                # The hashed password is stored in the following form: SHA1(salt + SHA1(password))
                def salt_password(clear_password)
                  self.salt = User.generate_salt
                  self.hashed_password = User.hash_password("#{salt}#{User.hash_password clear_password}")
                  self.passwd_changed_on = Time.now.change(:usec => 0)
                end
                # Does the backend storage allow this user to change their password?
                def change_password_allowed?
                  return true if auth_source.nil?
                  return auth_source.allow_password_changes?
                end
                # Returns true if the user password has expired
                def password_expired?
                  period = Setting.password_max_age.to_i
                  if period.zero?
                    false
                  else
                    changed_on = self.passwd_changed_on || Time.at(0)
                    changed_on < period.days.ago
                  end
                end
                def must_change_password?
                  (must_change_passwd? || password_expired?) && change_password_allowed?
                end
                def generate_password?
                  generate_password == '1' || generate_password == true
                end
                # Generate and set a random password on given length
                def random_password(length=40)
                  chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a
                  chars -= %w(0 O 1 l)
                  password = ''
                  length.times {|i| password << chars[SecureRandom.random_number(chars.size)] }
                  self.password = password
                  self.password_confirmation = password
                  self
                end
                def pref
                  self.preference ||= UserPreference.new(:user => self)
                end
                def time_zone
                  @time_zone ||= (self.pref.time_zone.blank? ? nil : ActiveSupport::TimeZone[self.pref.time_zone])
                end
                def force_default_language?
                  Setting.force_default_language_for_loggedin?
                end
                def language
                  if force_default_language?
                    Setting.default_language
                  else
                    super
                  end
                end
                def wants_comments_in_reverse_order?
                  self.pref[:comments_sorting] == 'desc'
                end
                # Return user's RSS key (a 40 chars long string), used to access feeds
                def rss_key
                  if rss_token.nil?
                    create_rss_token(:action => 'feeds')
                  end
                  rss_token.value
                end
                # Return user's API key (a 40 chars long string), used to access the API
                def api_key
                  if api_token.nil?
                    create_api_token(:action => 'api')
                  end
                  api_token.value
                end
                # Return an array of project ids for which the user has explicitly turned mail notifications on
                def notified_projects_ids
                  @notified_projects_ids ||= memberships.select {|m| m.mail_notification?}.collect(&:project_id)
                end
                def notified_project_ids=(ids)
                  @notified_projects_ids_changed = true
                  @notified_projects_ids = ids.map(&:to_i).uniq.select {|n| n > 0}
                end
                # Updates per project notifications (after_save callback)
                def update_notified_project_ids
                  if @notified_projects_ids_changed
                    ids = (mail_notification == 'selected' ? Array.wrap(notified_projects_ids).reject(&:blank?) : [])
                    members.update_all(:mail_notification => false)
                    members.where(:project_id => ids).update_all(:mail_notification => true) if ids.any?
                  end
                end
                private :update_notified_project_ids
                def valid_notification_options
                  self.class.valid_notification_options(self)
                end
                # Only users that belong to more than 1 project can select projects for which they are notified
                def self.valid_notification_options(user=nil)
                  # Note that @user.membership.size would fail since AR ignores
                  # :include association option when doing a count
                  if user.nil? || user.memberships.length < 1
                    MAIL_NOTIFICATION_OPTIONS.reject {|option| option.first == 'selected'}
                  else
                    MAIL_NOTIFICATION_OPTIONS
                  end
                end
                # Find a user account by matching the exact login and then a case-insensitive
                # version.  Exact matches will be given priority.
                def self.find_by_login(login)
                  login = Redmine::CodesetUtil.replace_invalid_utf8(login.to_s)
                  if login.present?
                    # First look for an exact match
                    user = where(:login => login).detect {|u| u.login == login}
                    unless user
                      # Fail over to case-insensitive if none was found
                      user = where("LOWER(login) = ?", login.downcase).first
                    end
                    user
                  end
                end
                def self.find_by_rss_key(key)
                  Token.find_active_user('feeds', key)
                end
                def self.find_by_api_key(key)
                  Token.find_active_user('api', key)
                end
                # Makes find_by_mail case-insensitive
                def self.find_by_mail(mail)
                  having_mail(mail).first
                end
                # Returns true if the default admin account can no longer be used
                def self.default_admin_account_changed?
                  !User.active.find_by_login("admin").try(:check_password?, "admin")
                end
                def to_s
                  name
                end
                CSS_CLASS_BY_STATUS = {
                  STATUS_ANONYMOUS  => 'anon',
                  STATUS_ACTIVE     => 'active',
                  STATUS_REGISTERED => 'registered',
                  STATUS_LOCKED     => 'locked'
                }
                def css_classes
                  "user #{CSS_CLASS_BY_STATUS[status]}"
                end
                # Returns the current day according to user's time zone
                def today
                  if time_zone.nil?
                    Date.today
                  else
                    Time.now.in_time_zone(time_zone).to_date
                  end
                end
                # Returns the day of +time+ according to user's time zone
                def time_to_date(time)
                  if time_zone.nil?
                    time.to_date
                  else
                    time.in_time_zone(time_zone).to_date
                  end
                end
                def logged?
                  true
                end
                def anonymous?
                  !logged?
                end
                # Returns user's membership for the given project
                # or nil if the user is not a member of project
                def membership(project)
                  project_id = project.is_a?(Project) ? project.id : project
                  @membership_by_project_id ||= Hash.new {|h, project_id|
                    h[project_id] = memberships.where(:project_id => project_id).first
                  }
                  @membership_by_project_id[project_id]
                end
                # Returns the user's bult-in role
                def builtin_role
                  @builtin_role ||= Role.non_member
                end
                # Return user's roles for project
                def roles_for_project(project)
                  # No role on archived projects
                  return [] if project.nil? || project.archived?
                  if membership = membership(project)
                    membership.roles.dup
                  elsif project.is_public?
                    project.override_roles(builtin_role)
                  else
                    []
                  end
                end
                # Returns a hash of user's projects grouped by roles
                def projects_by_role
                  return @projects_by_role if @projects_by_role
                  hash = Hash.new([])
                  group_class = anonymous? ? GroupAnonymous : GroupNonMember
                  members = Member.joins(:project, :principal).
                    where("#{Project.table_name}.status <> 9").
                    where("#{Member.table_name}.user_id = ? OR (#{Project.table_name}.is_public = ? AND #{Principal.table_name}.type = ?)", self.id, true, group_class.name).
                    preload(:project, :roles).
                    to_a
                  members.reject! {|member| member.user_id != id && project_ids.include?(member.project_id)}
                  members.each do |member|
                    if member.project
                      member.roles.each do |role|
                        hash[role] = [] unless hash.key?(role)
                        hash[role] << member.project
                      end
                    end
                  end
                  hash.each do |role, projects|
                    projects.uniq!
                  end
                  @projects_by_role = hash
                end
                # Returns the ids of visible projects
                def visible_project_ids
                  @visible_project_ids ||= Project.visible(self).pluck(:id)
                end
                # Returns true if user is arg or belongs to arg
                def is_or_belongs_to?(arg)
                  if arg.is_a?(User)
                    self == arg
                  elsif arg.is_a?(Group)
                    arg.users.include?(self)
                  else
                    false
                  end
                end
                # Return true if the user is allowed to do the specified action on a specific context
                # Action can be:
                # * a parameter-like Hash (eg. :controller => 'projects', :action => 'edit')
                # * a permission Symbol (eg. :edit_project)
                # Context can be:
                # * a project : returns true if user is allowed to do the specified action on this project
                # * an array of projects : returns true if user is allowed on every project
                # * nil with options[:global] set : check if user has at least one role allowed for this action,
                #   or falls back to Non Member / Anonymous permissions depending if the user is logged
                def allowed_to?(action, context, options={}, &block)
                  if context && context.is_a?(Project)
                    return false unless context.allows_to?(action)
                    # Admin users are authorized for anything else
                    return true if admin?
                    roles = roles_for_project(context)
                    return false unless roles
                    roles.any? {|role|
                      (context.is_public? || role.member?) &&
                      role.allowed_to?(action) &&
                      (block_given? ? yield(role, self) : true)
                    }
                  elsif context && context.is_a?(Array)
                    if context.empty?
                      false
                    else
                      # Authorize if user is authorized on every element of the array
                      context.map {|project| allowed_to?(action, project, options, &block)}.reduce(:&)
                    end
                  elsif context
                    raise ArgumentError.new("#allowed_to? context argument must be a Project, an Array of projects or nil")
                  elsif options[:global]
                    # Admin users are always authorized
                    return true if admin?
                    # authorize if user has at least one role that has this permission
                    roles = memberships.collect {|m| m.roles}.flatten.uniq
                    roles << (self.logged? ? Role.non_member : Role.anonymous)
                    roles.any? {|role|
                      role.allowed_to?(action) &&
                      (block_given? ? yield(role, self) : true)
                    }
                  else
                    false
                  end
                end
                # Is the user allowed to do the specified action on any project?
                # See allowed_to? for the actions and valid options.
                #
                # NB: this method is not used anywhere in the core codebase as of
                # 2.5.2, but it's used by many plugins so if we ever want to remove
                # it it has to be carefully deprecated for a version or two.
                def allowed_to_globally?(action, options={}, &block)
                  allowed_to?(action, nil, options.reverse_merge(:global => true), &block)
                end
                def allowed_to_view_all_time_entries?(context)
                  allowed_to?(:view_time_entries, context) do |role, user|
                    role.time_entries_visibility == 'all'
                  end
                end
                # Returns true if the user is allowed to delete the user's own account
                def own_account_deletable?
                  Setting.unsubscribe? &&
                    (!admin? || User.active.where("admin = ? AND id <> ?", true, id).exists?)
                end
                safe_attributes 'login',
                  'firstname',
                  'lastname',
                  'mail',
                  'mail_notification',
                  'notified_project_ids',
                  'language',
                  'custom_field_values',
                  'custom_fields',
                  'identity_url'
                safe_attributes 'status',
                  'auth_source_id',
                  'generate_password',
                  'must_change_passwd',
                  :if => lambda {|user, current_user| current_user.admin?}
                safe_attributes 'group_ids',
                  :if => lambda {|user, current_user| current_user.admin? && !user.new_record?}
                # Utility method to help check if a user should be notified about an
                # event.
                #
                # TODO: only supports Issue events currently
                def notify_about?(object)
                  if mail_notification == 'all'
                    true
                  elsif mail_notification.blank? || mail_notification == 'none'
                    false
                  else
                    case object
                    when Issue
                      case mail_notification
                      when 'selected', 'only_my_events'
                        # user receives notifications for created/assigned issues on unselected projects
                        object.author == self || is_or_belongs_to?(object.assigned_to) || is_or_belongs_to?(object.assigned_to_was)
                      when 'only_assigned'
                        is_or_belongs_to?(object.assigned_to) || is_or_belongs_to?(object.assigned_to_was)
                      when 'only_owner'
                        object.author == self
                      end
                    when News
                      # always send to project members except when mail_notification is set to 'none'
                      true
                    end
                  end
                end
                def self.current=(user)
                  RequestStore.store[:current_user] = user
                end
                def self.current
                  RequestStore.store[:current_user] ||= User.anonymous
                end
                # Returns the anonymous user.  If the anonymous user does not exist, it is created.  There can be only
                # one anonymous user per database.
                def self.anonymous
                  anonymous_user = AnonymousUser.first
                  if anonymous_user.nil?
                    anonymous_user = AnonymousUser.create(:lastname => 'Anonymous', :firstname => '', :login => '', :status => 0)
                    raise 'Unable to create the anonymous user.' if anonymous_user.new_record?
                  end
                  anonymous_user
                end
                # Salts all existing unsalted passwords
                # It changes password storage scheme from SHA1(password) to SHA1(salt + SHA1(password))
                # This method is used in the SaltPasswords migration and is to be kept as is
                def self.salt_unsalted_passwords!
                  transaction do
                    User.where("salt IS NULL OR salt = ''").find_each do |user|
                      next if user.hashed_password.blank?
                      salt = User.generate_salt
                      hashed_password = User.hash_password("#{salt}#{user.hashed_password}")
                      User.where(:id => user.id).update_all(:salt => salt, :hashed_password => hashed_password)
                    end
                  end
                end
                protected
                def validate_password_length
                  return if password.blank? && generate_password?
                  # Password length validation based on setting
                  if !password.nil? && password.size < Setting.password_min_length.to_i
                    errors.add(:password, :too_short, :count => Setting.password_min_length.to_i)
                  end
                end
                def instantiate_email_address
                  email_address || build_email_address
                end
                private
                def generate_password_if_needed
                  if generate_password? && auth_source.nil?
                    length = [Setting.password_min_length.to_i + 2, 10].max
                    random_password(length)
                  end
                end
                # Delete all outstanding password reset tokens on password change.
                # Delete the autologin tokens on password change to prohibit session leakage.
                # This helps to keep the account secure in case the associated email account
                # was compromised.
                def destroy_tokens
                  if hashed_password_changed?
                    tokens = ['recovery', 'autologin']
                    Token.where(:user_id => id, :action => tokens).delete_all
                  end
                end
                # Removes references that are not handled by associations
                # Things that are not deleted are reassociated with the anonymous user
                def remove_references_before_destroy
                  return if self.id.nil?
                  substitute = User.anonymous
                  Attachment.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  Comment.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  Issue.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  Issue.where(['assigned_to_id = ?', id]).update_all('assigned_to_id = NULL')
                  Journal.where(['user_id = ?', id]).update_all(['user_id = ?', substitute.id])
                  JournalDetail.
                    where(["property = 'attr' AND prop_key = 'assigned_to_id' AND old_value = ?", id.to_s]).
                    update_all(['old_value = ?', substitute.id.to_s])
                  JournalDetail.
                    where(["property = 'attr' AND prop_key = 'assigned_to_id' AND value = ?", id.to_s]).
                    update_all(['value = ?', substitute.id.to_s])
                  Message.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  News.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  # Remove private queries and keep public ones
                  ::Query.delete_all ['user_id = ? AND visibility = ?', id, ::Query::VISIBILITY_PRIVATE]
                  ::Query.where(['user_id = ?', id]).update_all(['user_id = ?', substitute.id])
                  TimeEntry.where(['user_id = ?', id]).update_all(['user_id = ?', substitute.id])
                  Token.delete_all ['user_id = ?', id]
                  Watcher.delete_all ['user_id = ?', id]
                  WikiContent.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                  WikiContent::Version.where(['author_id = ?', id]).update_all(['author_id = ?', substitute.id])
                end
                # Return password digest
                def self.hash_password(clear_password)
                  Digest::SHA1.hexdigest(clear_password || "")
                end
                # Returns a 128bits random salt as a hex string (32 chars long)
                def self.generate_salt
                  Redmine::Utils.random_hex(16)
                end
              end
              class AnonymousUser < User
                validate :validate_anonymous_uniqueness, :on => :create
                def validate_anonymous_uniqueness
                  # There should be only one AnonymousUser in the database
                  errors.add :base, 'An anonymous user already exists.' if AnonymousUser.exists?
                end
                def available_custom_fields
                  []
                end
                # Overrides a few properties
                def logged?; false end
                def admin; false end
                def name(*args); I18n.t(:label_user_anonymous) end
                def mail=(*args); nil end
                def mail; nil end
                def time_zone; nil end
                def rss_key; nil end
                def pref
                  UserPreference.new(:user => self)
                end
                # Returns the user's bult-in role
                def builtin_role
                  @builtin_role ||= Role.anonymous
                end
                def membership(*args)
                  nil
                end
                def member_of?(*args)
                  false
                end
                # Anonymous user can not be destroyed
                def destroy
                  false
                end
                protected
                def instantiate_email_address
                end
              end

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