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# redMine - project management software

# Copyright (C) 2006  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 CustomValue < ActiveRecord::Base

  belongs_to :custom_field

  belongs_to :customized, :polymorphic => true

  def after_initialize

    if new_record? && custom_field && (customized_type.blank? || (customized && customized.new_record?))

      self.value ||= custom_field.default_value

    end

  end

  # Returns true if the boolean custom value is true

  def true?

    self.value == '1'

  end

  def editable?

    custom_field.editable?

  end

  def visible?

    custom_field.visible?

  end

  def required?

    custom_field.is_required?

  end

  def to_s

    value.to_s

  end

protected

  def validate

    if value.blank?

      errors.add(:value, :blank) if custom_field.is_required? and value.blank?    

    else

      errors.add(:value, :invalid) unless custom_field.regexp.blank? or value =~ Regexp.new(custom_field.regexp)

      errors.add(:value, :too_short, :count => custom_field.min_length) if custom_field.min_length > 0 and value.length < custom_field.min_length

      errors.add(:value, :too_long, :count => custom_field.max_length) if custom_field.max_length > 0 and value.length > custom_field.max_length

      # Format specific validations

      case custom_field.field_format

      when 'int'

        errors.add(:value, :not_a_number) unless value =~ /^[+-]?\d+$/        

      when 'float'

        begin; Kernel.Float(value); rescue; errors.add(:value, :invalid) end

      when 'date'

        errors.add(:value, :not_a_date) unless value =~ /^\d{4}-\d{2}-\d{2}$/

      when 'list'

        errors.add(:value, :inclusion) unless custom_field.possible_values.include?(value)

      end

    end

  end

end