module Ontology::Links

extend ActiveSupport::Concern

included do

has_many :links, :extend => Methods

end

module Methods

def iri_for_child(*args)

proxy_association.owner.iri_for_child(*args)

end

def update_or_create_from_hash(hash, user, timestamp = Time.now)

raise ArgumentError, 'No hash given.' unless hash.is_a? Hash

# hash['name'] # maybe nil, in this case, we need to generate a name

link_iri = iri_for_child(hash['name'] || hash['linkid'])

link_name = hash['name']

source_iri = iri_for_child(hash['source'])

target_iri = iri_for_child(hash['target'])

source = Ontology.find_by_iri(source_iri) || (raise ArgumentError, "source ontology not found: #{source_iri}")

target = Ontology.find_by_iri(target_iri) || (raise ArgumentError, "target ontology not found: #{target_iri}")

# linktype

linktype = hash['type']

raise "link type missing" if linktype.blank?

kind = Link::KINDS.find {|k| linktype.downcase.include?(k) }

kind ||= Link::KIND_DEFAULT

# moprhism

gmorphism = hash['morphism']

raise "gmorphism missing" if gmorphism.blank?

gmorphism = 'http://purl.net/dol/translations/' + gmorphism unless gmorphism.include?('://')

# login mapping

logic_mapping = LogicMapping.find_by_iri gmorphism

logic_mapping ||= LogicMapping.create! \

source: source.logic,

target: target.logic,

iri: link_iri,

user: user

# finally, create or update the link

link = find_or_initialize_by_iri(link_iri)

link.attributes = {

link.updated_at = timestamp

link.save!

#link.versions << LinkVersion.create(link: link,

# source: source.versions.current,

# target: target.versions.current)

# entity mapping

if hash["map"]

source = Entity.where(text: hash["map"].first["text"],ontology_id: link.source.id).first

target = Entity.where(text: hash["map"].second["text"], ontology_id: link.target.id).first

entity_mapping = EntityMapping.first_or_initialize(source: source, target: target, link: link)

entity_mapping.save!

end

end

end