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root/lib/ldap_shadows/elements/object.rb @ cd48b9c9

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#--
# LdapShadows, a Medium-level LDAP Access Library and Tool.
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# Copyright (c) 2009-2010 Marc Dequènes (Duck) <Duck@DuckCorp.org>
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#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#++


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require 'ldap_shadows/manipulation_helper'


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module LdapShadows
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module Elements
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class LdapObject < ActiveLdap::Base
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include LdapElement
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FULL_HANDLE_PATTERN = /^(?:root|([a-zA-Z_]+)\/(.+))$/
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attr_reader :parent_changed

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@relations_info = {}
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class << self
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attr_reader :relations_info
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end

# default
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ldap_mapping :prefix => '', :classes => ['top'], :scope => :sub

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def initialize(attributes = nil)
super(attributes)

@parent_changed = false
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@latest_parent_full_handle = nil
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end

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def handle
name = self[dn_attribute] || self.attributes[dn_attribute] || self.dn
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name = name.first if name.is_a? Array
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name.strip
end

def full_handle
"#{self.class.handle}/#{self.handle}"
end

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def self.cast
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super

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ldap_mapping self.parameters[:mapping].reject {|key, val| not ActiveLdap::Base::VALID_LDAP_MAPPING_OPTIONS.include?(key)}
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end

def self.cast_relations
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super

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object_rel = {}
object_rel.merge!(self.parameters[:relations]) if self.parameters.include?(:relations)
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self.possible_aspects.each do |aspect_name|
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aspect = self.shadow.get_aspect(aspect_name)
if aspect.nil?
raise PreProcessingError, _("Aspect '%s' is missing for object '%s'") % [aspect_name, self.handle]
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end
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object_rel.merge!(aspect.parameters[:relations])
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end

object_relations_info = {}
object_rel.each_pair do |field_name, rel|
foreign_klass = self.shadow.get_object(rel[:object])
if foreign_klass.nil?
raise PreProcessingError, _("Relation '%s' for object '%s' is impossible: foreign object '%s' is missing") % [field_name, self.handle, rel[:object]]
end
rel[:class_name] = foreign_klass.to_s

case rel[:type]
when 'belongs_to'
belongs_to field_name, rel.reject {|key, val| not ActiveLdap::Associations::ClassMethods::VALID_BELONGS_TO_OPTIONS.include?(key) }
when 'has_many'
has_many field_name, rel.reject {|key, val| not ActiveLdap::Associations::ClassMethods::VALID_HAS_MANY_OPTIONS.include?(key) }
else
raise "bug in '#{self.handle}' object relations (wrong type)"
end

object_relations_info[field_name] = {
:foreign_klass => foreign_klass,
:single_value => ActiveLdap::Base.schema.attribute(rel[:foreign_key]).single_value?,
:read_only => rel[:read_only] || false
}
end
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instance_variable_set(:@relations_info, object_relations_info)
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end

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def has_field?(field)
return false if field.downcase == "objectclass"
has_attribute?(field)
end

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def human_name
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attr_list = ['displayName', 'cn']
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name_attribute = self.class.parameters[:presentation][:name_attribute]
attr_list.unshift(name_attribute) unless name_attribute.nil?
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attr_list.each do |attr|
if attr == 'dn'
return self.dn
elsif self.attribute_present?(attr)
val = self.send(attr, true)
return val[0].strip
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end
end
return ""
end

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def human_description
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attr_list = ['description']
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desc_attribute = self.class.parameters[:presentation][:desc_attribute]
attr_list.unshift(desc_attribute) unless desc_attribute.nil?
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attr_list.each do |attr|
if self.attribute_present?(attr)
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return self[attr].is_a?(Array) ? self[attr][0] : self[attr]
end
end
return ""
end

def possible_relations
self.associations.collect {|assoc| assoc.to_s } - ['children']
end

def relations
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rel_list = self.class.parameters[:mapping][:associated_relations]
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aspects.values.each do |aspect|
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rel_list += aspect.parameters[:mapping][:associated_relations]
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end

rel_list & possible_relations
end

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def self.possible_aspects
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self.parameters[:mapping][:possible_aspects].sort
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end

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def aspects
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present_aspects = {}
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self.class.possible_aspects.each do |aspect_name|
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aspect = self.class.shadow.get_aspect(aspect_name)
aspect_mapping = aspect.parameters[:mapping]
present_aspects[aspect.handle] = aspect if self.classes & aspect_mapping[:classes] == aspect_mapping[:classes]
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end

present_aspects
end

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def organized_data
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ignored_attrs = self.class.shadow.get_config[:presentation][:hidden_attributes]
ignored_attrs += self.class.parameters[:presentation][:hidden_attributes]
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attr_list = self.nonempty_attributes - ignored_attrs
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expert_attributes = self.class.parameters[:presentation][:expert_attributes]
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admin_attributes = attr_list.select do |attr|
ActiveLdap::Base.schema.attribute(attr).operational?
end

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rel_list = self.possible_relations

# first pass to take aspects forced relations into account
obj_aspects = {}
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self.aspects.values.each do |aspect|
aspect_data = aspect.parameters
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unless aspect_data[:mapping][:associated_attributes].empty?
taken_attr_list = aspect_data[:mapping][:associated_attributes] & (attr_list + ignored_attrs)
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unless taken_attr_list.empty?
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obj_aspects[aspect.handle] ||= {}
obj_aspects[aspect.handle].merge!(fetch_attributes_data(taken_attr_list, expert_attributes, admin_attributes))
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attr_list -= taken_attr_list
end
end

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unless aspect_data[:mapping][:associated_relations].empty?
taken_rel_list = aspect_data[:mapping][:associated_relations] & rel_list
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unless taken_rel_list.empty?
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obj_aspects[aspect.handle] ||= {}
obj_aspects[aspect.handle].merge!(fetch_relations_data(taken_rel_list, expert_attributes))
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rel_list -= taken_rel_list
end
end
end

# manage general attributes
obj_info = {}
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if self.class.parameters[:mapping][:associate_unclaimed_attributes]
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taken_attr_list = attr_list
else
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taken_attr_list = admin_attributes
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taken_attr_list += self.class.parameters[:mapping][:associated_attributes]
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taken_attr_list += self.class.possible_attributes
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end
taken_attr_list = taken_attr_list.uniq & attr_list
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obj_info = fetch_attributes_data(taken_attr_list, expert_attributes, admin_attributes)
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attr_list -= taken_attr_list

# manage general relations
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if self.class.parameters[:mapping][:associated_relations]
taken_rel_list = self.class.parameters[:mapping][:associated_relations] & rel_list
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unless taken_rel_list.empty?
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obj_info.merge!(fetch_relations_data(taken_rel_list, expert_attributes))
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rel_list -= taken_rel_list
end
end

# second pass to dispath the remaining attributes
unless attr_list.empty?
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self.aspects.values.each do |aspect|
taken_attr_list = (aspect.possible_attributes & attr_list)
obj_aspects[aspect.handle] ||= {}
obj_aspects[aspect.handle].merge!(fetch_attributes_data(taken_attr_list, expert_attributes, admin_attributes))
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attr_list -= taken_attr_list

break if attr_list.empty?
end
end

[obj_info, obj_aspects]
end

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def modify(key, op, val)
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if key.index(":")
type, field = key.split(":")
else
type = nil
field = key
end

case type
when nil
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modify_field(key, op, val)
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when 'rel'
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modify_relation(field, op, val)
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when ''
case field
when 'aspects'
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modify_aspects(op, val)
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when 'parent'
modify_parent(op, val)
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else
raise PreProcessingError, _("Unknown core field '%s'") % field
end
else
raise PreProcessingError, _("Unknown type '%s' for field '%s'") % [type, field]
end
end

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def modify_field(field, op, val)
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unless self.has_field?(field)
raise PreProcessingError, _("No such field '%s' in object '%s'") % [field, self.class.handle]
end

attr_info = ActiveLdap::Base.schema.attribute(field)
if attr_info.read_only?
raise PreProcessingError, _("The field '%s' cannot be modified (read only)") % field
end

if attr_info.binary?
unless File.exists?(val)
raise PreProcessingError, _("The field '%s' contains binary data, you must provide a filename instead of a direct value") % field
end

begin
val = File.read(val)
rescue
raise PreProcessingError, _("The file for the binary field '%s' cannot be read: ") % [field, $!]
end
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elsif attr_info.syntax.to_param == "1.3.6.1.4.1.1466.115.121.1.12"
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if val =~ FULL_HANDLE_PATTERN
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obj_hdl = $1.downcase
item_hdl = $2

obj_klass = self.class.shadow.get_object(obj_hdl)
raise PreProcessingError, _("No such object '%s'") % obj_hdl if obj_klass.nil?

begin
item = obj_klass.find(item_hdl, :attributes => [''])
rescue ActiveLdap::EntryNotFound
raise PreProcessingError, _("No such item '%s/%s'") % [obj_klass.handle, item_hdl]
end

val = item.dn
end
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end

old_val = self.send(field, true)

# if val is nil or the latest value is removed, then the attribute is removed from the object,
case op
when '='
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val = [val] if old_val.is_a? Enumerable
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return false if val == old_val

self.send(field + "=", val)

when '+='
if attr_info.single_value?
raise PreProcessingError, _("The field '%s' cannot hold more than one value") % field
end

return false if old_val.include?(val)
new_val = old_val << val
self.send(field + "=", new_val)

when '-='
return false unless old_val.include?(val)

new_val = old_val - [val]
self.send(field + "=", new_val)

else
raise SyntaxError, _("Unknown operator '%s'") % op
end

true
end

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def modify_relation(rel, op, val)
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unless self.relations.include?(rel)
raise PreProcessingError, _("No such relation '%s' for object '%s'") % [rel, self.class.handle]
end

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rel_info = self.class.relations_info[rel.to_sym]
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if rel_info[:read_only]
raise PreProcessingError, _("The relation '%s' cannot be modified (read only)") % rel
end

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if val.blank?
raise PreProcessingError, _("No item handle specified for relation '%s'") % rel
end

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# fetch remote object in relation, which will be the real 'val'
foreign_item_list = rel_info[:foreign_klass].find(:all, val)
if foreign_item_list.empty?
raise PreProcessingError, _("Foreign item '%s' for relation '%s' not found") % [val, rel]
end
if foreign_item_list.size > 1
raise WeirdError, _("Ambiguous item '%s' for relation '%s' (%s possible items)") %
[val, rel, foreign_item_list.size]
end

old_val = self.send(rel)
val = foreign_item_list.first

# if val is nil or the latest value is removed, then the association's attribute is removed from one side
case op
when '='
val = [val] if old_val.is_a? Enumerable
self.send(rel + "=", val)

when '+='
if rel_info[:single_value]
raise PreProcessingError, _("The relation '%s' cannot hold more than one foreign item") % rel
end

return false if old_val.include?(val)

self.send(rel) << val

when '-='
return false unless old_val.include?(val)

self.send(rel).delete(val)

else
raise SyntaxError, _("Unknown operator '%s'") % op
end

true
end

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def modify_aspects(op, aspect_name)
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unless self.class.possible_aspects.include?(aspect_name)
raise PreProcessingError, _("No such aspect '%s' for object '%s'") % [aspect_name, self.class.handle]
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end

case op
when '='
raise PreProcessingError, _("The equality operator is not possible for aspects")

when '+='
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return false if self.aspects.keys.include?(aspect_name)
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self.add_aspect(aspect_name)
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when '-='
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return false unless self.aspects.keys.include?(aspect_name)
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self.remove_aspect(aspect_name)
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else
raise SyntaxError, _("Unknown operator '%s'") % op
end

true
end

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def modify_parent(op, parent_full_handle)
case op
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when '='
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when '+=', '-='
raise PreProcessingError, _("This operator is not possible for parent")
else
raise SyntaxError, _("Unknown operator '%s'") % op
end

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unless Manipulation.looks_like_full_handle?(parent_full_handle)
raise PreProcessingError, _("Parent for the item is not a full handle")
end
parent_item = Manipulation.find_item_by_full_handle(self.class.shadow, parent_full_handle)
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if self.new_entry?
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self.base = parent_item.dn_obj - parent_item.class.base_obj
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else
raise PreProcessingError, _("Moving items is not yet implemented")
end
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@parent_changed = true
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@latest_parent_full_handle = parent_full_handle
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end

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def add_aspect(aspect_name)
return unless self.class.possible_aspects.include?(aspect_name)
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aspect_mapping = self.class.shadow.get_aspect(aspect_name).parameters[:mapping]
add_class(*aspect_mapping[:classes])
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# recursive dependency enforcement
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aspect_mapping[:depend_aspects].each do |dep_aspect|
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add_aspect(dep_aspect)
end
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end

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def remove_aspect(aspect_name)
return unless self.class.possible_aspects.include?(aspect_name)
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# remove reverse-depends
self.class.possible_aspects.each do |rdep_aspect_name|
if self.class.shadow.get_aspect(rdep_aspect_name).parameters[:mapping][:depend_aspects].include?(aspect_name)
remove_aspect(rdep_aspect_name)
end
end

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aspect_mapping = self.class.shadow.get_aspect(aspect_name).parameters[:mapping]
remove_class(*aspect_mapping[:classes])
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end

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def delete(options = {})
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before_delete_jobs
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super(options)
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after_save_jobs
end

def delete_recursive
# TODO: recursive instanciation and reverse recursive hook calls
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before_delete_jobs
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self.class.delete_all(nil, :scope => :sub, :base => self.dn)
after_delete_jobs
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end

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# cannot override create_or_update() because of alias chaining
def save
before_save_jobs
r = super
after_save_jobs
r
end
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def save!
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before_save_jobs
r = super
after_save_jobs
r
end

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protected

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def before_save_jobs
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check_hooks_before(:save)
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check_missing_attributes
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check_password
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check_parent
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end

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def before_delete_jobs
check_hooks_before(:delete)
end

def check_hooks_before(action)
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case action
when :save
if self.new_entry?
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self.class.hook_before_create(self)
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else
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self.class.hook_before_modify(self)
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end
when :delete
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self.class.hook_before_delete(self)
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end

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# TODO: move this in the LdapAspect class
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self.aspects.each do |aspect_name, aklass|
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case action
when :save
if self.new_entry?
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aklass.hook_before_create(self)
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else
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aklass.hook_before_modify(self)
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end
when :delete
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aklass.hook_before_delete(self)
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end
end
end

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def check_missing_attributes
missing_fields = self.missing_attributes
unless missing_fields.empty?
miss_str = []
missing_fields.each do |field|
str = Translator.translate_field_name(field)
str += " [#{field}]" if $program_options[:handles]
miss_str << str
end
raise PreProcessingError, _("Cannot save the item; the following fields are missing: %s") %
miss_str.join(", ")
end
end

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def check_password
return unless self.modified_attributes([:replace], true).include? 'userPassword'

hash_func = self.class.config.global_config[:password_hash]
return if hash_func.nil?

self.userPassword = ActiveLdap::UserPassword.send(hash_func, self.userPassword)
end

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def check_parent
bf962db8 Marc Dequènes (Duck)
parent_full_handle = nil
parent_item_dn = nil

fa116a1b Marc Dequènes (Duck)
if self.new_entry? and not self.parent_changed
parent_full_handle = self.class.parameters[:mapping][:default_parent]
if parent_full_handle
020c18fe Marc Dequènes (Duck)
unless Manipulation.looks_like_full_handle?(parent_full_handle)
raise PreProcessingError, _("Default parent for the item is not a full handle")
end

fa116a1b Marc Dequènes (Duck)
begin
020c18fe Marc Dequènes (Duck)
parent_item = Manipulation.find_item_by_full_handle(self.class.shadow, parent_full_handle)
fa116a1b Marc Dequènes (Duck)
self.base = parent_item.dn_obj - parent_item.class.base_obj
rescue
raise PreProcessingError, _("Cannot create the item: bad default parent for this kind of object: %s") % $!
end
bf962db8 Marc Dequènes (Duck)
parent_item_dn = parent_item.dn.to_s
fa116a1b Marc Dequènes (Duck)
else
raise PreProcessingError, _("Cannot create the item: parent not specified and no default for such object")
end
end
bf962db8 Marc Dequènes (Duck)
parent_full_handle = @latest_parent_full_handle if parent_full_handle.nil?
parent_item_dn = self.base.to_s if parent_item_dn.nil?

p_hdl_restr = self.class.parameters[:mapping][:parent_handle_restrictions]
unless p_hdl_restr.nil? or parent_full_handle =~ Regexp.new(p_hdl_restr)
raise PreProcessingError, _("This parent can't raise such a child (handle restrictions)")
end
p_dn_restr = self.class.parameters[:mapping][:parent_dn_restrictions]
unless p_dn_restr.nil? or parent_item_dn =~ Regexp.new(p_dn_restr)
raise PreProcessingError, _("This parent can't raise such a child (DN restrictions)")
end
fa116a1b Marc Dequènes (Duck)
end

d8cfa085 Marc Dequènes (Duck)
def after_save_jobs
check_hooks_after(:save)
fa116a1b Marc Dequènes (Duck)
@parent_changed = false
d8cfa085 Marc Dequènes (Duck)
end

def after_delete_jobs
check_hooks_after(:delete)
end

def check_hooks_after(action)
0a4afc42 Marc Dequènes (Duck)
# TODO: move this in the LdapAspect class
d8cfa085 Marc Dequènes (Duck)
self.aspects.each do |aspect|
2e882c9f Marc Dequènes (Duck)
aklass = self.class.shadow.get_aspect(aspect)
d8cfa085 Marc Dequènes (Duck)
next if aklass.nil?

case action
when :save
if self.new_entry?
953a2b4d Marc Dequènes (Duck)
aklass.hook_after_create(self)
d8cfa085 Marc Dequènes (Duck)
else
953a2b4d Marc Dequènes (Duck)
aklass.hook_after_modify(self)
d8cfa085 Marc Dequènes (Duck)
end
when :delete
953a2b4d Marc Dequènes (Duck)
aklass.hook_after_delete(self)
d8cfa085 Marc Dequènes (Duck)
end
end
7b832340 Marc Dequènes (Duck)
case action
when :save
if self.new_entry?
953a2b4d Marc Dequènes (Duck)
self.class.hook_after_create(self)
7b832340 Marc Dequènes (Duck)
else
953a2b4d Marc Dequènes (Duck)
self.class.hook_after_modify(self)
7b832340 Marc Dequènes (Duck)
end
when :delete
953a2b4d Marc Dequènes (Duck)
self.class.hook_after_delete(self)
7b832340 Marc Dequènes (Duck)
end
d8cfa085 Marc Dequènes (Duck)
end

b52f0f7d Marc Dequènes (Duck)
def fetch_attributes_data(attr_list, expert_attributes, admin_attributes)
f7217dcd Marc Dequènes (Duck)
attr_data = self.attributes.collect do |key, val|
if attr_list.include?(key)
aa4e021c Marc Dequènes (Duck)
attr_info = ActiveLdap::Base.schema.attribute(key)
f7217dcd Marc Dequènes (Duck)
[key, {
aa4e021c Marc Dequènes (Duck)
:syntax => attr_info.syntax.to_param,
f7217dcd Marc Dequènes (Duck)
:value => val,
:multiple => (val.is_a?(Array) ? val.size : 1),
:expert => expert_attributes.include?(key),
b52f0f7d Marc Dequènes (Duck)
:admin => admin_attributes.include?(key),
aa4e021c Marc Dequènes (Duck)
:binary => attr_info.binary?
f7217dcd Marc Dequènes (Duck)
}]
else
nil
end
end
Hash[attr_data.compact]
89d8bebc Marc Dequènes (Duck)
end

f7217dcd Marc Dequènes (Duck)
def fetch_relations_data(rel_list, expert_attributes)
89d8bebc Marc Dequènes (Duck)
rel_data = rel_list.collect do |rel|
3d58e226 Marc Dequènes (Duck)
data = self.send(rel)
if data.is_a? Enumerable
if data.empty?
value = nil
else
38e5c5db Marc Dequènes (Duck)
value = data.collect{|g| g.handle }
3d58e226 Marc Dequènes (Duck)
multiple = true
end
else
a987d14b Marc Dequènes (Duck)
# the exists? method also ensure the object is loaded
if data.exists?
38e5c5db Marc Dequènes (Duck)
value = data.handle
9f623500 Marc Dequènes (Duck)
else
value = nil
3d58e226 Marc Dequènes (Duck)
end
multiple = false
end

if value.nil?
f7217dcd Marc Dequènes (Duck)
nil
else
3d58e226 Marc Dequènes (Duck)
rel_key = "rel:" + rel
[rel_key, {
aa4e021c Marc Dequènes (Duck)
:syntax => nil,
3d58e226 Marc Dequènes (Duck)
:value => value,
:multiple => multiple,
:expert => expert_attributes.include?(rel_key),
b52f0f7d Marc Dequènes (Duck)
:admin => false,
f7217dcd Marc Dequènes (Duck)
:binary => false
}]
end
89d8bebc Marc Dequènes (Duck)
end
Hash[rel_data.compact]
end
end
end
5a48a521 Marc Dequènes (Duck)
end