/
orm_converter.rb
252 lines (212 loc) · 5.97 KB
/
orm_converter.rb
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# frozen_string_literal: true
module Valkyrie::Persistence::Solr
##
# Converts a solr hash to a {Valkyrie::Resource}
class ORMConverter
attr_reader :solr_document
def initialize(solr_document)
@solr_document = solr_document
end
def convert!
resource
end
def resource
resource_klass.new(attributes.symbolize_keys.merge(new_record: false))
end
def resource_klass
internal_resource.constantize
end
def internal_resource
solr_document[Valkyrie::Persistence::Solr::Queries::MODEL].first
end
def attributes
attribute_hash.merge("id" => id, internal_resource: internal_resource, created_at: created_at, updated_at: updated_at)
end
def created_at
DateTime.parse(solr_document["created_at_dtsi"].to_s).utc
end
def updated_at
DateTime.parse(solr_document["timestamp"] || solr_document["created_at_dtsi"].to_s).utc
end
def id
solr_document["id"].gsub(/^id-/, '')
end
def attribute_hash
build_literals(strip_tsim(solr_document.select do |k, _v|
k.end_with?("tsim")
end))
end
def strip_tsim(hsh)
Hash[
hsh.map do |k, v|
[k.gsub("_tsim", ""), v]
end
]
end
class Property
attr_reader :key, :value, :document
def initialize(key, value, document)
@key = key
@value = value
@document = document
end
end
def build_literals(hsh)
hsh.each_with_object({}) do |(key, value), output|
next if key.end_with?("_lang")
output[key] = SolrValue.for(Property.new(key, value, hsh)).result
end
end
class SolrValue < ::Valkyrie::ValueMapper
end
# Converts a stored language typed literal from two fields into one
# {RDF::Literal}
class LanguagePropertyValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.is_a?(Property) && value.document["#{value.key}_lang"]
end
def result
value.value.zip(languages).map do |literal, language|
if language == "eng"
literal
else
RDF::Literal.new(literal, language: language)
end
end
end
def languages
value.document["#{value.key}_lang"]
end
end
class PropertyValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.is_a?(Property)
end
def result
calling_mapper.for(value.value).result
end
end
class EnumerableValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.respond_to?(:each)
end
def result
value.map do |element|
calling_mapper.for(element).result
end
end
end
# Converts a stored ID value in solr into a {Valkyrie::ID}
class IDValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.to_s.start_with?("id-")
end
def result
Valkyrie::ID.new(value.gsub(/^id-/, ''))
end
end
# Converts a stored URI value in solr into a {RDF::URI}
class URIValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.to_s.start_with?("uri-")
end
def result
::RDF::URI.new(value.gsub(/^uri-/, ''))
end
end
# Converts a nested resource in solr into a {Valkyrie::Resource}
class NestedResourceValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.to_s.start_with?("serialized-")
end
def result
NestedResourceConverter.for(JSON.parse(json, symbolize_names: true)).result
end
def json
value.gsub(/^serialized-/, '')
end
end
class NestedResourceConverter < ::Valkyrie::ValueMapper
end
class NestedEnumerable < ::Valkyrie::ValueMapper
NestedResourceConverter.register(self)
def self.handles?(value)
value.is_a?(Array)
end
def result
value.map do |v|
calling_mapper.for(v).result
end
end
end
class NestedResourceID < ::Valkyrie::ValueMapper
NestedResourceConverter.register(self)
def self.handles?(value)
value.is_a?(Hash) && value[:id] && !value[:internal_resource]
end
def result
Valkyrie::ID.new(value[:id])
end
end
class NestedResourceURI < ::Valkyrie::ValueMapper
NestedResourceConverter.register(self)
def self.handles?(value)
value.is_a?(Hash) && value[:@id]
end
def result
RDF::URI(value[:@id])
end
end
class NestedResourceLiteral < ::Valkyrie::ValueMapper
NestedResourceConverter.register(self)
def self.handles?(value)
value.is_a?(Hash) && value[:@value]
end
def result
RDF::Literal.new(value[:@value], language: value[:@language])
end
end
class NestedResourceHash < ::Valkyrie::ValueMapper
NestedResourceConverter.register(self)
def self.handles?(value)
value.is_a?(Hash)
end
def result
Hash[
value.map do |k, v|
[k, calling_mapper.for(v).result]
end
]
end
end
# Converts an integer in solr into an {Integer}
class IntegerValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
value.to_s.start_with?("integer-")
end
def result
value.gsub(/^integer-/, '').to_i
end
end
# Converts a datetime in Solr into a {DateTime}
class DateTimeValue < ::Valkyrie::ValueMapper
SolrValue.register(self)
def self.handles?(value)
return false unless value.to_s.start_with?("datetime-")
DateTime.iso8601(value.gsub(/^datetime-/, '')).utc
rescue
false
end
def result
DateTime.parse(value.gsub(/^datetime-/, '')).utc
end
end
end
end