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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_one :contest_stat, :class_name => "UserContestStat", :dependent => :destroy
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belongs_to :site
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belongs_to :country
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has_and_belongs_to_many :contests, :uniq => true, :order => 'name'
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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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# this is for will_paginate
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cattr_reader :per_page
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@@per_page = 50
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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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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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# Contest information
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def self.find_users_with_no_contest()
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users = User.find(:all)
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return users.find_all { |u| u.contests.length == 0 }
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end
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def contest_time_left
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if Configuration.contest_mode?
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return nil if site==nil
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return site.time_left
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elsif Configuration.indv_contest_mode?
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time_limit = Configuration.contest_time_limit
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if time_limit == nil
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return nil
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end
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if contest_stat==nil or contest_stat.started_at==nil
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return (Time.now.gmtime + time_limit) - Time.now.gmtime
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else
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finish_time = contest_stat.started_at + time_limit
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current_time = Time.now.gmtime
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if current_time > finish_time
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return 0
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else
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return finish_time - current_time
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end
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end
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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 contest_finished?
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if Configuration.contest_mode?
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return false if site==nil
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return site.finished?
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elsif Configuration.indv_contest_mode?
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return false if self.contest_stat(true)==nil
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return contest_time_left == 0
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else
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return false
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end
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end
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def contest_started?
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if Configuration.indv_contest_mode?
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stat = self.contest_stat
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return ((stat != nil) and (stat.started_at != nil))
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elsif Configuration.contest_mode?
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return true if site==nil
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return site.started
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else
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return true
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end
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end
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def update_start_time
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stat = self.contest_stat
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if stat == nil or stat.started_at == nil
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stat ||= UserContestStat.new(:user => self)
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stat.started_at = Time.now.gmtime
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stat.save
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end
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end
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def problem_in_user_contests?(problem)
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problem_contests = problem.contests.all
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if problem_contests.length == 0 # this is public contest
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return true
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end
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contests.each do |contest|
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if problem_contests.find {|c| c.id == contest.id }
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return true
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end
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end
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return false
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end
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def available_problems_group_by_contests
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contest_problems = []
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pin = {}
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contests.enabled.each do |contest|
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available_problems = contest.problems.available
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contest_problems << {
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:contest => contest,
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:problems => available_problems
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}
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available_problems.each {|p| pin[p.id] = true}
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end
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other_avaiable_problems = Problem.available.find_all {|p| pin[p.id]==nil and p.contests.length==0}
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contest_problems << {
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:contest => nil,
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:problems => other_avaiable_problems
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}
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return contest_problems
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end
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def available_problems
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if not Configuration.multicontests?
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return Problem.find_available_problems
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else
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contest_problems = []
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pin = {}
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contests.enabled.each do |contest|
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contest.problems.available.each do |problem|
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if not pin.has_key? problem.id
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contest_problems << problem
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end
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pin[problem.id] = true
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end
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end
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other_avaiable_problems = Problem.available.find_all {|p| pin[p.id]==nil and p.contests.length==0}
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return contest_problems + other_avaiable_problems
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end
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end
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def can_view_problem?(problem)
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if not Configuration.multicontests?
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return problem.available
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else
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return problem_in_user_contests? problem
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end
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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-