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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 => "problem_id"
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validates_presence_of :login
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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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attr_accessor :password
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before_save :encrypt_new_password
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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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hashed_password == User.encrypt(password,self.salt)
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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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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 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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end
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jittat-