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