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require 'digest/sha1'
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class User < ActiveRecord::Base
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has_and_belongs_to_many :roles
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has_many :test_requests, :order => "submitted_at DESC"
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has_many :messages,
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:class_name => "Message",
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:foreign_key => "sender_id",
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:order => 'created_at DESC'
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has_many :replied_messages,
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:class_name => "Message",
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:foreign_key => "receiver_id",
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:order => 'created_at DESC'
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has_many :test_pair_assignments, :dependent => :delete_all
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belongs_to :site
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belongs_to :country
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named_scope :activated_users, :conditions => {:activated => true}
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validates_presence_of :login
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validates_uniqueness_of :login
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validates_format_of :login, :with => /^[\_A-Za-z0-9]+$/
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validates_length_of :login, :within => 3..30
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validates_presence_of :full_name
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validates_length_of :full_name, :minimum => 1
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validates_presence_of :password, :if => :password_required?
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validates_length_of :password, :within => 4..20, :if => :password_required?
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validates_confirmation_of :password, :if => :password_required?
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validates_format_of :email,
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:with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i,
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:if => :email_validation?
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validate :uniqueness_of_email_from_activated_users,
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:if => :email_validation?
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validate :enough_time_interval_between_same_email_registrations,
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:if => :email_validation?
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# these are for ytopc
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# disable for now
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#validates_presence_of :province
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attr_accessor :password
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before_save :encrypt_new_password
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before_save :assign_default_site
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def self.authenticate(login, password)
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user = find_by_login(login)
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return user if user && user.authenticated?(password)
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end
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def authenticated?(password)
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if self.activated
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hashed_password == User.encrypt(password,self.salt)
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else
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false
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end
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end
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def admin?
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self.roles.detect {|r| r.name == 'admin' }
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end
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# These are methods related to test pairs
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def get_test_pair_assignments_for(problem)
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test_pair_assignments.find_all { |a| a.problem_id == problem.id }
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end
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def get_recent_test_pair_assignment_for(problem)
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assignments = get_test_pair_assignments_for problem
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if assignments.length == 0
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return nil
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else
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recent = assignments[0]
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assignments.each do |a|
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recent = a if a.request_number > recent.request_number
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end
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return recent
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end
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end
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def can_request_new_test_pair_for?(problem)
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recent = get_recent_test_pair_assignment_for problem
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return (recent == nil or recent.submitted)
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end
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def get_new_test_pair_assignment_for(problem)
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previous_assignment_numbers =
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get_test_pair_assignments_for(problem).collect {|a| a.test_pair_number }
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test_pair = problem.random_test_pair(previous_assignment_numbers)
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if test_pair
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assignment = TestPairAssignment.new(:user => self,
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:problem => problem,
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:test_pair => test_pair,
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:test_pair_number => test_pair.number,
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:request_number =>
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previous_assignment_numbers.length + 1,
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:submitted => false)
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return assignment
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else
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return nil
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end
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end
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def email_for_editing
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if self.email==nil
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"(unknown)"
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elsif self.email==''
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"(blank)"
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else
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self.email
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end
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end
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def email_for_editing=(e)
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self.email=e
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end
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def alias_for_editing
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if self.alias==nil
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"(unknown)"
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elsif self.alias==''
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"(blank)"
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else
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self.alias
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end
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end
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def alias_for_editing=(e)
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self.alias=e
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end
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def activation_key
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if self.hashed_password==nil
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encrypt_new_password
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end
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Digest::SHA1.hexdigest(self.hashed_password)[0..7]
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end
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def verify_activation_key(key)
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key == activation_key
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end
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def self.random_password(length=5)
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chars = 'abcdefghjkmnopqrstuvwxyz'
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password = ''
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length.times { password << chars[rand(chars.length - 1)] }
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password
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end
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def self.find_non_admin_with_prefix(prefix='')
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users = User.find(:all)
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return users.find_all { |u| !(u.admin?) and u.login.index(prefix)==0 }
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end
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protected
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def encrypt_new_password
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return if password.blank?
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self.salt = (10+rand(90)).to_s
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self.hashed_password = User.encrypt(self.password,self.salt)
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end
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def assign_default_site
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# have to catch error when migrating (because self.site is not available).
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begin
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if self.site==nil
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self.site = Site.find_by_name('default')
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if self.site==nil
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self.site = Site.find(1) # when 'default has be renamed'
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end
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end
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rescue
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end
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end
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def password_required?
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self.hashed_password.blank? || !self.password.blank?
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end
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def self.encrypt(string,salt)
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Digest::SHA1.hexdigest(salt + string)
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end
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def uniqueness_of_email_from_activated_users
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user = User.activated_users.find_by_email(self.email)
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if user and (user.login != self.login)
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self.errors.add_to_base("Email has already been taken")
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end
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end
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def enough_time_interval_between_same_email_registrations
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return if !self.new_record?
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return if self.activated
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open_user = User.find_by_email(self.email,
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:order => 'created_at DESC')
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if open_user and open_user.created_at and
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(open_user.created_at > Time.now.gmtime - 5.minutes)
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self.errors.add_to_base("There are already unactivated registrations with this e-mail address (please wait for 5 minutes)")
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end
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end
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def email_validation?
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begin
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return VALIDATE_USER_EMAILS
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rescue
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return false
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end
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end
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end
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Jittat Fakcharoenphol-