Class: Document

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby3mf/document.rb

Constant Summary collapse

RELATIONSHIP_TYPES =

Relationship Type => Class validating relationship type

{
  'http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel' => {klass: 'Model3mf', collection: :models},
  'http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail' => {klass: 'Thumbnail3mf', collection: :thumbnails},
  'http://schemas.microsoft.com/3dmanufacturing/2013/01/3dtexture' => {klass: 'Texture3mf', collection: :textures}
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(zip_filename) ⇒ Document

Returns a new instance of Document.



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# File 'lib/ruby3mf/document.rb', line 15

def initialize(zip_filename)
  self.models=[]
  self.thumbnails=[]
  self.textures=[]
  self.objects={}
  @zip_filename = zip_filename
end

Instance Attribute Details

#models ⇒ Object

Returns the value of attribute models.



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# File 'lib/ruby3mf/document.rb', line 3

def models
  @models
end

#objects ⇒ Object

Returns the value of attribute objects.



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# File 'lib/ruby3mf/document.rb', line 6

def objects
  @objects
end

#textures ⇒ Object

Returns the value of attribute textures.



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# File 'lib/ruby3mf/document.rb', line 5

def textures
  @textures
end

#thumbnails ⇒ Object

Returns the value of attribute thumbnails.



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# File 'lib/ruby3mf/document.rb', line 4

def thumbnails
  @thumbnails
end

Class Method Details

.read(input_file) ⇒ Object 



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# File 'lib/ruby3mf/document.rb', line 23

def self.read(input_file)
  m=self.new(input_file)
  m.zip_filename = input_file    begin
    Log3mf.context "examining zip" do |l|
      begin
        Zip.warn_invalid_date = false
        Zip::File.open(input_file) do |zip_file|

          # puts "Zip contents:"
          # zip_file.each do |entry|
          #   puts entry
          # end

          l.info "Zip file is valid"

          l.context "content types" do |l|
            # 1. Get Content Types
            content_type_match = zip_file.glob('\[Content_Types\].xml').first
            if content_type_match
              @types = ContentTypes.parse(content_type_match)
            else
              l.error "Missing required file: [Content_Types].xml", page: 4
            end
          end

          l.context "relationships" do |l|
            # 2. Get Relationships
            # rel_folders = zip_file.glob('**/_rels')
            # l.fatal_error "Missing any _rels folder", page: 4 unless rel_folders.size>0

            # 2.1 Validate that the top level _rels/.rel file exists
            rel_file = zip_file.glob('_rels/.rels').first
            l.fatal_error "Missing required file _rels/.rels", page: 4 unless rel_file

            @relationships=[]
            zip_file.glob('**/*.rels').each do |rel|
              @relationships += Relationships.parse(rel)
            end
          end

          l.context "relationship elements" do |l|
            # 3. Validate all relationships
            @relationships.each do |rel|
              l.context rel[:target] do |l|
                target = rel[:target].gsub(/^\//, "")
                relationship_file = zip_file.glob(target).first

                if relationship_file
                  relationship_type = RELATIONSHIP_TYPES[rel[:type]]
                  if relationship_type.nil?
                    l.warning "Relationship file defines a type that is not used in a normal 3mf file: #{rel[:type]}. Ignoring relationship."
                  else
                    m.send(relationship_type[:collection]) << {
                      rel_id: rel[:id],
                      target: rel[:target],
                      object: Object.const_get(relationship_type[:klass]).parse(m, relationship_file, @relationships)
                    }
                  end
                else
                  l.error "Relationship Target file #{rel[:target]} not found", page: 11
                end
              end
            end
          end
        end
        return m
      rescue Zip::Error
        l.fatal_error 'File provided is not a valid ZIP archive', page: 9
        return nil
      end
    end
  rescue Log3mf::FatalError
    #puts "HALTING PROCESSING DUE TO FATAL ERROR"
    return nil
  end
end

Instance Method Details

#write(output_file = nil) ⇒ Object 



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# File 'lib/ruby3mf/document.rb', line 100

def write(output_file = nil)
  output_file = @zip_filename if output_file.nil?

  input_zip_file = Zip::File.open(@zip_filename)

  buffer = Zip::OutputStream.write_buffer do |out|
    input_zip_file.entries.each do |e|
      if e.directory?
        out.copy_raw_entry(e)
      else
        out.put_next_entry(e.name)
        if objects[e.name]
          out.write objects[e.name]
        else
          out.write e.get_input_stream.read
        end
      end
    end
  end

  input_zip_file.close

  File.open(output_file, "wb") {|f| f.write(buffer.string) }
end