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#--
# LdapShadows, a Medium-level LDAP Access Library and Tool.
# Copyright (c) 2009 Marc Dequènes (Duck) <Duck@DuckCorp.org>
#
# 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/>.
#++


$KCODE = 'UTF8'
require 'jcode'
require 'active_ldap'
require 'ldap_shadows/object'


module LdapShadows
class Controller
def initialize(mod_container = LdapShadows::Objects)
@mod_container = mod_container
@object_definitions = {}
@aspects = {}
end

def set_global_config(global_config)
@global_config = global_config
end

def get_global_config
@global_config
end

def set_aspect(aspect_name, aspect_def)
@aspects[aspect_name] = aspect_def
end

def get_aspect(aspect_name)
@aspects[aspect_name.to_sym]
end

def self.object_name_to_klass_name(obj_name)
"LdapObject" + obj_name.to_s.capitalize
end

def load_object(obj_name, obj_def)
obj_mapping = obj_def[:mapping]
klass_name = self.class.object_name_to_klass_name(obj_name)

# create class
@mod_container.module_eval(<<-EOS)
class #{klass_name} < LdapShadows::LdapObject; end
EOS

# configure class
klass = find_klass(obj_name)
klass.handle = obj_name
klass.presentation = obj_def[:presentation]
klass.mapper = self
klass.ldap_mapping obj_mapping.reject {|key, val| not ActiveLdap::Base::VALID_LDAP_MAPPING_OPTIONS.include?(key) }

# store definition for later relations processing
@object_definitions[obj_name] = obj_def
end

def find_klass(obj_name)
klass_name = self.class.object_name_to_klass_name(obj_name)
return nil unless @mod_container.const_defined?(klass_name)
@mod_container.const_get(klass_name)
end

# run it _once_ when all objects are loaded
def load_relations
@object_definitions.each_pair do |obj_name, obj_def|
obj_rel = {}
obj_rel.merge!(obj_def[:relations]) if obj_def.include?(:relations)
if obj_def[:presentation].has_key?(:allowed_aspects)
obj_def[:presentation][:allowed_aspects].each do |rel|
rel_data = get_aspect(rel)
obj_rel.merge!(rel_data[:relations]) if rel_data.has_key?(:relations) and rel_data[:relations]
end
end
next if obj_rel.empty?

klass = find_klass(obj_name)

obj_relations_info = {}
obj_rel.each_pair do |field_name, rel|
foreign_klass = find_klass(rel[:object])
rel[:class_name] = foreign_klass.to_s

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

obj_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
klass.relations_info = obj_relations_info
end
end

def objects
@object_definitions.keys.collect{|key| key.to_s }.sort
end
end

# default location for mapped objects
module Objects
end
end

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