Class: TTL2HTML::App

Inherits:
Object
  • Object
show all
Defined in:
lib/ttl2html.rb

Instance Method Summary collapse

Constructor Details

#initialize(config = "config.yml") ⇒ App

Returns a new instance of App.



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# File 'lib/ttl2html.rb', line 13

def initialize(config = "config.yml")
  @template = {}
  @config = load_config(config)
  if not @config[:base_uri]
    raise "load_config: base_uri not found"
  end
  @data = {}
  @data_inverse = {}
  @prefix = {}
  @graph = RDF::Graph.new
end

Instance Method Details

#cleanup ⇒ Object 



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# File 'lib/ttl2html.rb', line 209

def cleanup
  @data.select do |uri, v|
    uri.start_with? @config[:base_uri]
  end.sort_by do |uri, v|
    -(uri.size)
  end.each do |uri, v|
    if @data.keys.find{|e| e.start_with?(uri + "/") }
      file = uri + "/index.html"
    else
      file = uri + ".html"
    end
    html_file = file.sub(@config[:base_uri], "")
    html_file = File.join(@config[:output_dir], html_file) if @config[:output_dir]
    File.unlink html_file
    ttl_file = uri.sub(@config[:base_uri], "") + ".ttl"
    ttl_file = File.join(@config[:output_dir], ttl_file) if @config[:output_dir]
    File.unlink ttl_file
    dir = uri.sub(@config[:base_uri], "")
    dir = File.join(@config[:output_dir], dir) if @config[:output_dir]
    Dir.rmdir dir if File.exist? dir
  end
  index_html = "index.html"
  index_html = File.join(@config[:output_dir], "index.html") if @config[:output_dir]
  if @config[:top_class] and File.exist? index_html
    File.unlink index_html
  end
end

#each_data ⇒ Object 



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# File 'lib/ttl2html.rb', line 117

def each_data
  @data.each do |uri, v|
    next if not uri.start_with? @config[:base_uri]
    yield uri, v
  end
end

#format_turtle(subject, depth = 1) ⇒ Object 



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# File 'lib/ttl2html.rb', line 67

def format_turtle(subject, depth = 1)
  turtle = RDF::Turtle::Writer.new
  result = ""
  if subject.iri?
    result << "<#{subject}>\n#{"  "*depth}"
  else
    result << "[\n#{"  "*depth}"
  end
  result << @graph.query([subject, nil, nil]).predicates.sort.map do |predicate|
    str = "<#{predicate}> "
    str << @graph.query([subject, predicate, nil]).objects.sort_by do |object|
      if object.resource? and not object.iri? # blank node:
        @graph.query([object, nil, nil]).statements.sort_by{|e|
          [ e.predicate, e.object ]
        }.map{|e|
          [ e.predicate, e.object ]
        }
      else
        object
      end
    end.map do |object|
      if object.resource? and not object.iri? # blank node:
        format_turtle(object, depth + 1)
      else
        case object
        when RDF::URI
          turtle.format_uri(object)
        else
          turtle.format_literal(object)
        end
      end
    end.join(", ")
    str
  end.join(";\n#{"  "*depth}")
  result << " ." if subject.iri?
  result << "\n"
  result << "#{"  "*(depth-1)}]" if not subject.iri?
  result
end

#format_turtle_inverse(object) ⇒ Object 



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# File 'lib/ttl2html.rb', line 106

def format_turtle_inverse(object)
  turtle = RDF::Turtle::Writer.new
  result = ""
  @graph.query([nil, nil, object]).statements.sort_by do |e|
    [ e.subject, e.predicate, object ]
  end.map do |e|
    result << "<#{e.subject}> <#{e.predicate}> <#{object}>.\n"
  end
  result
end

#load_config(file) ⇒ Object 



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# File 'lib/ttl2html.rb', line 25

def load_config(file)
  config = {}
  YAML.load_file(file).each do |k, v|
    config[k.intern] = v
  end
  config
end

#load_turtle(file) ⇒ Object 



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# File 'lib/ttl2html.rb', line 33

def load_turtle(file)
  STDERR.puts "loading #{file}..."
  count = 0
  if file.end_with?(".gz")
    io = Zlib::GzipReader.open(file)
  else
    io = File.open(file)
  end
  RDF::Turtle::Reader.new(io) do |reader|
    @prefix.merge! reader.prefixes
    reader.statements.each do |statement|
      @graph.insert(statement)
      s = statement.subject
      v = statement.predicate
      o = statement.object
      count += 1
      @data[s.to_s] ||= {}
      if o.respond_to?(:has_language?) and o.has_language?
        @data[s.to_s][v.to_s] ||= {}
        @data[s.to_s][v.to_s][o.language] = o.to_s
      else
        @data[s.to_s][v.to_s] ||= []
        @data[s.to_s][v.to_s] << o.to_s
      end
      if o.is_a? RDF::URI
        @data_inverse[o.to_s] ||= {}
        @data_inverse[o.to_s][v.to_s] ||= []
        @data_inverse[o.to_s][v.to_s] << s.to_s
      end
    end
  end
  STDERR.puts "#{count} triples. #{@data.size} subjects."
  @data
end

#output_html_files ⇒ Object 



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# File 'lib/ttl2html.rb', line 123

def output_html_files
  each_data do |uri, v|
    template = Template.new("default.html.erb", @config)
    param = @config.dup
    param[:uri] = uri
    param[:data] = v
    param[:data_inverse] = @data_inverse[uri]
    param[:data_global] = @data
    param[:title] = template.get_title(v)
    if @data.keys.find{|e| e.start_with?(uri + "/") }
      file = uri + "/index.html"
    elsif uri.end_with?("/")
      file = uri + "index.html"
    else
      file = uri + ".html"
    end
    #p uri, param
    file = file.sub(@config[:base_uri], "")
    if @config[:output_dir]
      Dir.mkdir @config[:output_dir] if not File.exist? @config[:output_dir]
      file = File.join(@config[:output_dir], file)
    end
    template.output_to(file, param)
  end
  index_html = "index.html"
  index_html = File.join(@config[:output_dir], "index.html") if @config[:output_dir]
  if @config.has_key? :top_class
    subjects = @graph.query([nil,
                            RDF::URI("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
                            RDF::URI(@config[:top_class])]).subjects
    if subjects.empty?
      STDERR.puts "WARN: top_class parameter specified as [#{@config[:top_class]}], but there is no instance data."
      STDERR.puts "  Skip generation of top page."
    else
      template = Template.new("index.html.erb", @config)
      param = @config.dup
      param[:data_global] = @data
      subjects.sort.each do |subject|
        param[:index_data] ||= []
        param[:index_data] << subject.to_s
      end
      template.output_to(index_html, param)
    end
  end
  shapes = @graph.query([nil,
                         RDF::URI("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"),
                         RDF::URI("http://www.w3.org/ns/shacl#NodeShape")])
  if shapes.size > 0
    about_html = @config[:about_file] || "about.html"
    about_html =  File.join(@config[:output_dir], about_html) if @config[:output_dir]
    template = Template.new("about.html.erb", @config)
    param = @config.dup
    param[:data_global] = @data
    param[:content] = {}
    shapes.subjects.each do |subject|
      label = nil
      target_class = @data[subject.to_s]["http://www.w3.org/ns/shacl#targetClass"]
      if target_class
        label = template.get_title(@data[target_class.first], nil) if @data[target_class.first]
        label = template.format_property(target_class.first) if label.nil?
      else
        label = template.get_title(@data[subject.to_s])
      end
      param[:content][subject] = {
        label: label,
        html: template.expand_shape(@data, subject.to_s, @prefix),
      }
    end
    template.output_to(about_html, param)
  end
end

#output_turtle_files ⇒ Object 



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# File 'lib/ttl2html.rb', line 194

def output_turtle_files
  each_data do |uri, v|
    file = uri.sub(@config[:base_uri], "")
    file << ".ttl"
    if @config[:output_dir]
      Dir.mkdir @config[:output_dir] if not File.exist? @config[:output_dir]
      file = File.join(@config[:output_dir], file)
    end
    str = format_turtle(RDF::URI.new uri)
    str << format_turtle_inverse(RDF::URI.new uri)
    open(file, "w") do |io|
      io.puts str.strip
    end
  end
end