Class: Solis::Model

Inherits:
Object
  • Object
show all
Defined in:
lib/solis/model.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes = {}) ⇒ Model

Returns a new instance of Model.



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# File 'lib/solis/model.rb', line 11

def initialize(attributes = {})
  @model_name = self.class.name
  @model_plural_name = @model_name.pluralize
  @language = Graphiti.context[:object]&.language || Solis::Options.instance.get[:language] || 'en'

  raise "Please look at /#{@model_name.tableize}/model for structure to supply" if attributes.nil?

  attributes.each do |attribute, value|
    if self.class.metadata[:attributes].keys.include?(attribute.to_s)
      if !self.class.metadata[:attributes][attribute.to_s][:node_kind].nil? && !(value.is_a?(Hash) || value.is_a?(Array) || value.class.ancestors.include?(Solis::Model))
        raise Solis::Error::InvalidAttributeError, "'#{@model_name}.#{attribute}' must be an object"
      end

      if self.class.metadata[:attributes][attribute.to_s][:node_kind].is_a?(RDF::URI) && value.is_a?(Hash)
        inner_model = self.class.graph.shape_as_model(self.class.metadata[:attributes][attribute.to_s][:datatype].to_s)
        value = inner_model.new(value)
      elsif self.class.metadata[:attributes][attribute.to_s][:node_kind].is_a?(RDF::URI) && value.is_a?(Array)
        new_value = []
        value.each do |v|
          if v.is_a?(Hash)
            inner_model = self.class.graph.shape_as_model(self.class.metadata[:attributes][attribute.to_s][:datatype].to_s)
            new_value << inner_model.new(v)
          else
            new_value << v
          end
        end
        value = new_value
      end

      # switched off. currently language query parameters returns the value
      # value = {
      #   "@language" => @language,
      #   "@value" => value
      # } if self.class.metadata[:attributes][attribute.to_s][:datatype_rdf].eql?('http://www.w3.org/1999/02/22-rdf-syntax-ns#langString')

      value = value.first if value.is_a?(Array) && (attribute.eql?('id') || attribute.eql?(:id))

      instance_variable_set("@#{attribute}", value)
    else
      raise Solis::Error::InvalidAttributeError, "'#{attribute}' is not part of the definition of #{@model_name}"
    end
  end

  self.class.make_id_for(self)
  # id = instance_variable_get("@id")
  # if id.nil? || (id.is_a?(String) && id&.empty?)
  #   instance_variable_set("@id", SecureRandom.uuid)
  # end
rescue StandardError => e
  Solis::LOGGER.error(e.message)
  raise Solis::Error::GeneralError, "Unable to create entity #{@model_name}"
end

Class Method Details

.construct(level = 0) ⇒ Object 



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# File 'lib/solis/model.rb', line 397

def self.construct(level = 0)
  raise 'to bo implemented'
end

.graph ⇒ Object 



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# File 'lib/solis/model.rb', line 349

def self.graph
  @graph
end

.graph=(graph) ⇒ Object 



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# File 'lib/solis/model.rb', line 353

def self.graph=(graph)
  @graph = graph
end

.graph_name ⇒ Object 



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# File 'lib/solis/model.rb', line 325

def self.graph_name
  @graph_name
end

.graph_name=(graph_name) ⇒ Object 



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# File 'lib/solis/model.rb', line 329

def self.graph_name=(graph_name)
  @graph_name = graph_name
end

.graph_prefix ⇒ Object 



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# File 'lib/solis/model.rb', line 337

def self.graph_prefix
  @graph_prefix
end

.graph_prefix=(graph_prefix) ⇒ Object 



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# File 'lib/solis/model.rb', line 333

def self.graph_prefix=(graph_prefix)
  @graph_prefix = graph_prefix
end

.language ⇒ Object 



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# File 'lib/solis/model.rb', line 357

def self.language
  Graphiti.context[:object]&.language || Solis::Options.instance.get[:language] || @language || 'en'
end

.language=(language) ⇒ Object 



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# File 'lib/solis/model.rb', line 361

def self.language=(language)
  @language = language
end

.make_id_for(model) ⇒ Object 



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# File 'lib/solis/model.rb', line 292

def self.make_id_for(model)
  raise "I need a SPARQL endpoint" if self.sparql_endpoint.nil?
  sparql = SPARQL::Client.new(self.sparql_endpoint)
  id = model.instance_variable_get("@id")
  if id.nil? || (id.is_a?(String) && id&.empty?)
    id_retries = 0

    while id.nil? || sparql.query("ASK WHERE { ?s <#{self.graph_name}/id>  \"#{id}\" }")
      id = SecureRandom.uuid
      id_retries+=1
    end
    LOGGER.info("ID(#{id}) generated for #{self.name} in #{id_retries} retries") if ConfigFile[:debug]
    model.instance_variable_set("@id", id)
  end
  model
end

.metadata ⇒ Object 



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# File 'lib/solis/model.rb', line 309

def self.metadata
  @metadata
end

.metadata=(m) ⇒ Object 



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# File 'lib/solis/model.rb', line 313

def self.metadata=(m)
  @metadata = m
end

.model(level = 0) ⇒ Object 



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# File 'lib/solis/model.rb', line 365

def self.model(level = 0)
  m = { type: self.name.tableize, attributes: {} }
  self.metadata[:attributes].each do |attribute, attribute_metadata|

    if attribute_metadata.key?(:class) && !attribute_metadata[:class].nil? && attribute_metadata[:class].value =~ /#{self.graph_name}/ && level == 0
      cm = self.graph.shape_as_model(self.metadata[:attributes][attribute][:datatype].to_s).model(level + 1)
      m[:attributes][attribute.to_sym] = cm[:attributes]
    else
      m[:attributes][attribute.to_sym] = { description: attribute_metadata[:comment]&.value,
                                           mandatory: (attribute_metadata[:mincount].to_i > 0),
                                           data_type: attribute_metadata[:datatype] }
    end
  end

  m
end

.model_after_create(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 413

def self.model_after_create(&blk)
  self.after_create_proc = blk
end

.model_after_delete(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 429

def self.model_after_delete(&blk)
  self.after_delete_proc = blk
end

.model_after_read(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 405

def self.model_after_read(&blk)
  self.after_read_proc = blk
end

.model_after_update(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 421

def self.model_after_update(&blk)
  self.after_update_proc = blk
end

.model_before_create(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 409

def self.model_before_create(&blk)
  self.before_create_proc = blk
end

.model_before_delete(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 425

def self.model_before_delete(&blk)
  self.before_delete_proc = blk
end

.model_before_read(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 401

def self.model_before_read(&blk)
  self.before_read_proc = blk
end

.model_before_update(&blk) ⇒ Object 



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# File 'lib/solis/model.rb', line 417

def self.model_before_update(&blk)
  self.before_update_proc = blk
end

.model_template(level = 0) ⇒ Object 



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# File 'lib/solis/model.rb', line 382

def self.model_template(level = 0)
  m = { type: self.name.tableize, attributes: {} }
  self.metadata[:attributes].each do |attribute, attribute_metadata|

    if attribute_metadata.key?(:class) && !attribute_metadata[:class].nil? && attribute_metadata[:class].value =~ /#{self.graph_name}/ && level == 0
      cm = self.graph.shape_as_model(self.metadata[:attributes][attribute][:datatype].to_s).model_template(level + 1)
      m[:attributes][attribute.to_sym] = cm[:attributes]
    else
      m[:attributes][attribute.to_sym] = ''
    end
  end

  m
end

.shapes ⇒ Object 



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# File 'lib/solis/model.rb', line 321

def self.shapes
  @shapes
end

.shapes=(s) ⇒ Object 



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# File 'lib/solis/model.rb', line 317

def self.shapes=(s)
  @shapes = s
end

.sparql_endpoint ⇒ Object 



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# File 'lib/solis/model.rb', line 341

def self.sparql_endpoint
  @sparql_endpoint
end

.sparql_endpoint=(sparql_endpoint) ⇒ Object 



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# File 'lib/solis/model.rb', line 345

def self.sparql_endpoint=(sparql_endpoint)
  @sparql_endpoint = sparql_endpoint
end

Instance Method Details

#destroy ⇒ Object

Raises:



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# File 'lib/solis/model.rb', line 110

def destroy
  raise "I need a SPARQL endpoint" if self.class.sparql_endpoint.nil?
  sparql = SPARQL::Client.new(self.class.sparql_endpoint)

  raise Solis::Error::QueryError, "#{self.id} is still referenced, refusing to delete" if is_referenced?(sparql)
  # sparql.query('delete{}')
  before_delete_proc&.call(self)
  #      graph = as_graph(self, false)
  #      Solis::LOGGER.info graph.dump(:ttl) if ConfigFile[:debug]

  query = %(
with <#{self.class.graph_name}>
delete {?s ?p ?o}
where {
values ?s {<#{self.graph_id}>}
?s ?p ?o }
  )
  result = sparql.query(query)

  #      result = sparql.delete_data(graph, graph: graph.name)
  after_delete_proc&.call(result)
  result
end

#dump(format = :ttl, resolve_all = true) ⇒ Object 



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# File 'lib/solis/model.rb', line 86

def dump(format = :ttl, resolve_all = true)
  graph = as_graph(self, resolve_all)
  graph.dump(format)
end

#exists?(sparql) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solis/model.rb', line 288

def exists?(sparql)
  sparql.query("ASK WHERE { <#{self.graph_id}> ?p ?o }")
end

#graph_id ⇒ Object 



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# File 'lib/solis/model.rb', line 280

def graph_id
  "#{self.class.graph_name}#{self.name.tableize}/#{self.id}"
end

#is_referenced?(sparql) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solis/model.rb', line 284

def is_referenced?(sparql)
  sparql.query("ASK WHERE { ?s ?p <#{self.graph_id}>. filter (!contains(str(?p), '_audit'))}")
end

#name(plural = false) ⇒ Object 



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# File 'lib/solis/model.rb', line 64

def name(plural = false)
  if plural
    @model_plural_name
  else
    @model_name
  end
end

#query ⇒ Object 



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# File 'lib/solis/model.rb', line 72

def query
  raise "I need a SPARQL endpoint" if self.class.sparql_endpoint.nil?

  # before_read_proc&.call(self)
  result = Solis::Query.new(self)
  # after_read_proc&.call(result)
  result
end

#save(validate_dependencies = true, top_level = true) ⇒ Object 



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# File 'lib/solis/model.rb', line 134

def save(validate_dependencies = true, top_level = true)
  raise "I need a SPARQL endpoint" if self.class.sparql_endpoint.nil?
  sparql = SPARQL::Client.new(self.class.sparql_endpoint)

  before_create_proc&.call(self)

  if self.exists?(sparql)
    data = properties_to_hash(self)

    result = update(data)
  else
    data = properties_to_hash(self)
    attributes = data.include?('attributes') ? data['attributes'] : data
    attributes.each_pair do |key, value| # check each key. if it is an entity process it
      unless self.class.metadata[:attributes][key][:node].nil? #is it an entity
        value = [value] unless value.is_a?(Array)
        value.each do |sub_value|
          embedded = self.class.graph.shape_as_model(self.class.metadata[:attributes][key][:datatype].to_s).new(sub_value)
          embedded_readonly_entities = Solis::Options.instance.get[:embedded_readonly].map{|s| s.to_s} || []

          if (embedded.class.ancestors.map{|s| s.to_s} & embedded_readonly_entities).empty? || top_level
            if embedded.exists?(sparql)
              embedded_data = properties_to_hash(embedded)
              embedded.update(embedded_data, validate_dependencies, false)
            else
              embedded.save(validate_dependencies, false)
            end
          else
            Solis::LOGGER.info("#{embedded.class.name} is embedded not allowed to change. Skipping")
          end
        end
      end
    end

    graph = as_graph(self, validate_dependencies)

    # File.open('/Users/mehmetc/Dropbox/AllSources/LP/graphiti-api/save.ttl', 'wb') do |file|
    #   file.puts graph.dump(:ttl)
    # end
    Solis::LOGGER.info SPARQL::Client::Update::InsertData.new(graph, graph: graph.name).to_s if ConfigFile[:debug]

    result = sparql.insert_data(graph, graph: graph.name)
  end

  after_create_proc&.call(result)
  result
rescue StandardError => e
  Solis::LOGGER.error e.message
  Solis::LOGGER.error e.message
  raise e
end

#to_graph(resolve_all = true) ⇒ Object 



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# File 'lib/solis/model.rb', line 91

def to_graph(resolve_all = true)
  as_graph(self, resolve_all)
end

#to_ttl(resolve_all = true) ⇒ Object 



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# File 'lib/solis/model.rb', line 81

def to_ttl(resolve_all = true)
  graph = as_graph(self, resolve_all)
  graph.dump(:ttl)
end

#update(data, validate_dependencies = true, top_level = true) ⇒ Object 



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# File 'lib/solis/model.rb', line 186

def update(data, validate_dependencies = true, top_level = true)
  raise Solis::Error::GeneralError, "I need a SPARQL endpoint" if self.class.sparql_endpoint.nil?

  attributes = data.include?('attributes') ? data['attributes'] : data
  raise "id is mandatory when updating" unless attributes.keys.include?('id')

  id = attributes.delete('id')

  sparql = SPARQL::Client.new(self.class.sparql_endpoint)

  original_klass = self.query.filter({ language: nil, filters: { id: [id] } }).find_all.map { |m| m }&.first
  raise Solis::Error::NotFoundError if original_klass.nil?
  updated_klass = original_klass.deep_dup

  attributes.each_pair do |key, value| # check each key. if it is an entity process it
    unless original_klass.class.metadata[:attributes][key][:node].nil? #it is an entity
      value = [value] unless value.is_a?(Array)
      value.each do |sub_value|
        embedded = self.class.graph.shape_as_model(original_klass.class.metadata[:attributes][key][:datatype].to_s).new(sub_value)

        embedded_readonly_entities = Solis::Options.instance.get[:embedded_readonly].map{|s| s.to_s} || []

        if (embedded.class.ancestors.map{|s| s.to_s} & embedded_readonly_entities).empty? || top_level
          if embedded.exists?(sparql)
            embedded_data = properties_to_hash(embedded)
            embedded.update(embedded_data, validate_dependencies, false)
          else
            embedded.save(validate_dependencies, false)
          end
        else
          Solis::LOGGER.info("#{embedded.class.name} is embedded not allowed to change. Skipping")
        end
      end
    end

    updated_klass.instance_variable_set("@#{key}", value)
  end

  before_update_proc&.call(original_klass, updated_klass)

  properties_orignal_klass = properties_to_hash(original_klass)
  properties_updated_klass = properties_to_hash(updated_klass)

  if Hashdiff.best_diff(properties_orignal_klass, properties_updated_klass).empty?
    Solis::LOGGER.info("#{original_klass.class.name} unchanged, skipping")
    data = self.query.filter({ filters: { id: [id] } }).find_all.map { |m| m }&.first
  else

    delete_graph = as_graph(original_klass, false)

    where_graph = RDF::Graph.new(graph_name: RDF::URI("#{self.class.graph_name}#{self.name.tableize}/#{id}"), data: RDF::Repository.new)

    if id.is_a?(Array)
      id.each do |i|
        where_graph << [RDF::URI("#{self.class.graph_name}#{self.name.tableize}/#{i}"), :p, :o]
      end
    else
      where_graph << [RDF::URI("#{self.class.graph_name}#{self.name.tableize}/#{id}"), :p, :o]
    end

    insert_graph = as_graph(updated_klass, true)

    # puts delete_graph.dump(:ttl) #if ConfigFile[:debug]
    # puts insert_graph.dump(:ttl) #if ConfigFile[:debug]
    # puts where_graph.dump(:ttl) #if ConfigFile[:debug]

    # if ConfigFile[:debug]
    delete_insert_query = SPARQL::Client::Update::DeleteInsert.new(delete_graph, insert_graph, where_graph, graph: insert_graph.name).to_s
    delete_insert_query.gsub!('_:p', '?p')
    # puts delete_insert_query
    data = sparql.query(delete_insert_query)
    # pp data
    # end

    #      sparql.delete_insert(delete_graph, insert_graph, where_graph, graph: insert_graph.name)

    data = self.query.filter({ filters: { id: [id] } }).find_all.map { |m| m }&.first
    if data.nil?
      sparql.insert_data(insert_graph, graph: insert_graph.name)
      data = self.query.filter({ filters: { id: [id] } }).find_all.map { |m| m }&.first
    end
  end
  after_update_proc&.call(updated_klass, data)

  data
rescue StandardError => e
  original_graph = as_graph(original_klass, false)
  Solis::LOGGER.error(e.message)
  Solis::LOGGER.error original_graph.dump(:ttl)
  sparql.insert_data(original_graph, graph: original_graph.name)

  raise e
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solis/model.rb', line 95

def valid?
  begin
    graph = as_graph(self, false)
  rescue Solis::Error::InvalidAttributeError => e
    Solis::LOGGER.error(e.message)
  end

  shacl = SHACL.get_shapes(self.class.graph.instance_variable_get(:"@graph"))
  report = shacl.execute(graph)

  report.conform?
rescue StandardError => e
  false
end