SoundSoftware Code Site

# redMine - project management software

# Copyright (C) 2006-2007  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 Setting < ActiveRecord::Base

  DATE_FORMATS = [

        '%Y-%m-%d',

        '%d/%m/%Y',

        '%d.%m.%Y',

        '%d-%m-%Y',

        '%m/%d/%Y',

        '%d %b %Y',

        '%d %B %Y',

        '%b %d, %Y',

        '%B %d, %Y'

    ]

  TIME_FORMATS = [

    '%H:%M',

    '%I:%M %p'

    ]

  ENCODINGS = %w(US-ASCII

                  windows-1250

                  windows-1251

                  windows-1252

                  windows-1253

                  windows-1254

                  windows-1255

                  windows-1256

                  windows-1257

                  windows-1258

                  windows-31j

                  ISO-2022-JP

                  ISO-2022-KR

                  ISO-8859-1

                  ISO-8859-2

                  ISO-8859-3

                  ISO-8859-4

                  ISO-8859-5

                  ISO-8859-6

                  ISO-8859-7

                  ISO-8859-8

                  ISO-8859-9

                  ISO-8859-13

                  ISO-8859-15

                  KOI8-R

                  UTF-8

                  UTF-16

                  UTF-16BE

                  UTF-16LE

                  EUC-JP

                  Shift_JIS

                  GB18030

                  GBK

                  ISCII91

                  EUC-KR

                  Big5

                  Big5-HKSCS

                  TIS-620)

  cattr_accessor :available_settings

  @@available_settings = YAML::load(File.open("#{RAILS_ROOT}/config/settings.yml"))

  Redmine::Plugin.all.each do |plugin|

    next unless plugin.settings

    @@available_settings["plugin_#{plugin.id}"] = {'default' => plugin.settings[:default], 'serialized' => true}    

  end

  validates_uniqueness_of :name

  validates_inclusion_of :name, :in => @@available_settings.keys

  validates_numericality_of :value, :only_integer => true, :if => Proc.new { |setting| @@available_settings[setting.name]['format'] == 'int' }  

  # Hash used to cache setting values

  @cached_settings = {}

  @cached_cleared_on = Time.now

  def value

    v = read_attribute(:value)

    # Unserialize serialized settings

    v = YAML::load(v) if @@available_settings[name]['serialized'] && v.is_a?(String)

    v = v.to_sym if @@available_settings[name]['format'] == 'symbol' && !v.blank?

    v

  end

  def value=(v)

    v = v.to_yaml if v && @@available_settings[name] && @@available_settings[name]['serialized']

    write_attribute(:value, v.to_s)

  end

  # Returns the value of the setting named name

  def self.[](name)

    v = @cached_settings[name]

    v ? v : (@cached_settings[name] = find_or_default(name).value)

  end

  def self.[]=(name, v)

    setting = find_or_default(name)

    setting.value = (v ? v : "")

    @cached_settings[name] = nil

    setting.save

    setting.value

  end

  # Defines getter and setter for each setting

  # Then setting values can be read using: Setting.some_setting_name

  # or set using Setting.some_setting_name = "some value"

  @@available_settings.each do |name, params|

    src = <<-END_SRC

    def self.#{name}

      self[:#{name}]

    end

    def self.#{name}?

      self[:#{name}].to_i > 0

    end

    def self.#{name}=(value)

      self[:#{name}] = value

    end

    END_SRC

    class_eval src, __FILE__, __LINE__

  end

  # Helper that returns an array based on per_page_options setting

  def self.per_page_options_array

    per_page_options.split(%r{[\s,]}).collect(&:to_i).select {|n| n > 0}.sort

  end

  def self.openid?

    Object.const_defined?(:OpenID) && self[:openid].to_i > 0

  end

  # Checks if settings have changed since the values were read

  # and clears the cache hash if it's the case

  # Called once per request

  def self.check_cache

    settings_updated_on = Setting.maximum(:updated_on)

    if settings_updated_on && @cached_cleared_on <= settings_updated_on

      @cached_settings.clear

      @cached_cleared_on = Time.now

      logger.info "Settings cache cleared." if logger

    end

  end

private

  # Returns the Setting instance for the setting named name

  # (record found in database or new record with default value)

  def self.find_or_default(name)

    name = name.to_s

    raise "There's no setting named #{name}" unless @@available_settings.has_key?(name)    

    setting = find_by_name(name)

    setting ||= new(:name => name, :value => @@available_settings[name]['default']) if @@available_settings.has_key? name

  end

end