Class: ExtractMetadata

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

Instance Method Summary collapse

Constructor Details

#initialize(file, input_dir, output_dir) ⇒ ExtractMetadata

Returns a new instance of ExtractMetadata.



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# File 'lib/extractmetadata.rb', line 5

def initialize(file, input_dir, output_dir)
  @path = file
  @input_dir = input_dir
  @output_dir = output_dir
	@allowed_extensions = [
    'pdf', 'doc', 'docbook', 'docx', 'txt', 'rtf', 'md', 'csv', 'xls', 'xlsx', 
    'jpg', 'jpeg', 'png', 'gif', 'svg'
	]
end

Instance Method Details

#extract ⇒ Object

Extract metadata



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# File 'lib/extractmetadata.rb', line 16

def extract
  outhash = Hash.new
  
  # Get relative path
  @rel_path = get_rel_path
  outhash[:rel_path] = @rel_path
  outhash[:folders] = get_folders

  # Get formatted name and file type
  outhash[:formatted_name] = get_formatted_name
  outhash[:filetype] = get_file_type

  # Extract file metadata, merge. and return
  begin
 if (@allowed_extensions.include? outhash[:filetype])
      outhash.merge!(extract_file_metadata)
    else
      puts "skipping ." + outhash[:filetype] + " file" 
    end
  rescue
  end
  return outhash
end

#extract_file_metadata ⇒ Object

Extract PDF metadata



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

def extract_file_metadata
  metadata = Hash.new
  metadata[:author] = Docsplit.extract_author(@path)
  metadata[:creator] =  Docsplit.extract_creator(@path)
  metadata[:producer] = Docsplit.extract_producer(@path)
  metadata[:title] = Docsplit.extract_title(@path)
  metadata[:subject] = Docsplit.extract_subject(@path)
  metadata[:date] = Docsplit.extract_date(@path)
  metadata[:keywords] = Docsplit.extract_keywords(@path)
  metadata[:length] = Docsplit.extract_length(@path)
  return metadata
end

#get_file_type ⇒ Object

Get file type



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# File 'lib/extractmetadata.rb', line 62

def get_file_type
  @rel_path.split(".").last
end

#get_folders ⇒ Object

Split relative path and get array of directories



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# File 'lib/extractmetadata.rb', line 41

def get_folders
  folders = @rel_path.split("/")

  # Remove file and empty items
  folders.delete(folders.last)
  folders.delete("")

  return folders
end

#get_formatted_name ⇒ Object

Get a formatted file name



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# File 'lib/extractmetadata.rb', line 57

def get_formatted_name
  @rel_path.split(".").first.gsub("_", " ").gsub("/", "")
end

#get_rel_path ⇒ Object

Get the relative path



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# File 'lib/extractmetadata.rb', line 52

def get_rel_path
  @path.gsub(@input_dir, "")
end