SoundSoftware Code Site

# Redmine - project management software

# Copyright (C) 2006-2014  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.

class Token < ActiveRecord::Base

  belongs_to :user

  validates_uniqueness_of :value

  before_create :delete_previous_tokens, :generate_new_token

  @@validity_time = 1.day

  def generate_new_token

    self.value = Token.generate_token_value

  end

  # Return true if token has expired

  def expired?

    return Time.now > self.created_on + @@validity_time

  end

  # Delete all expired tokens

  def self.destroy_expired

    Token.delete_all ["action NOT IN (?) AND created_on < ?", ['feeds', 'api'], Time.now - @@validity_time]

  end

  # Returns the active user who owns the key for the given action

  def self.find_active_user(action, key, validity_days=nil)

    user = find_user(action, key, validity_days)

    if user && user.active?

      user

    end

  end

  # Returns the user who owns the key for the given action

  def self.find_user(action, key, validity_days=nil)

    token = find_token(action, key, validity_days)

    if token

      token.user

    end

  end

  # Returns the token for action and key with an optional

  # validity duration (in number of days)

  def self.find_token(action, key, validity_days=nil)

    action = action.to_s

    key = key.to_s

    return nil unless action.present? && key =~ /\A[a-z0-9]+\z/i

    token = Token.where(:action => action, :value => key).first

    if token && (token.action == action) && (token.value == key) && token.user

      if validity_days.nil? || (token.created_on > validity_days.days.ago)

        token

      end

    end

  end

  def self.generate_token_value

    Redmine::Utils.random_hex(20)

  end

  private

  # Removes obsolete tokens (same user and action)

  def delete_previous_tokens

    if user

      Token.delete_all(['user_id = ? AND action = ?', user.id, action])

    end

  end

end