Class: Princess::ExcelxReader

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

Instance Method Summary collapse

Constructor Details

#initialize(filename, default_sheet = 0) ⇒ ExcelxReader 



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# File 'lib/princess/excelx_reader.rb', line 4

def initialize(filename, default_sheet = 0)
  @filename = filename
  active_sheet(default_sheet)
end

Instance Method Details

#active_sheet(sheet_num) ⇒ Object

load a sheet for reading



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# File 'lib/princess/excelx_reader.rb', line 10

def active_sheet(sheet_num)
  raise 'invalid argument' if !sheet_num.is_a?(Integer)

  Zip::ZipFile.open(@filename) do |zipfile|

    # grab shared strings

    noko_shared_strings = Nokogiri::XML(zipfile.read('xl/sharedStrings.xml'))
    noko_shared_strings.remove_namespaces!
    @shared_strings = noko_shared_strings.xpath('//sst/si/t').map(&:content)

    # grab spreadsheet content

    doc = Nokogiri::XML(zipfile.read("xl/worksheets/sheet#{sheet_num + 1}.xml"))
    doc.remove_namespaces!
    ref = doc.xpath('//dimension').first.attr('ref')
    @rows = Array.new(ref.split(':').last.scan(/\d+/).first.to_i)
    doc.xpath('//sheetData/row').each do |row|
      row_num = row.attr('r').to_i - 1
      @rows[row_num] = row
    end

  end
end

#cell(coord) ⇒ Object

return the specified cell content



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# File 'lib/princess/excelx_reader.rb', line 52

def cell(coord)
  row(coord.scan(/\d+/).first.to_i).cell(coord.scan(/\D+/).first)
end

#each ⇒ Object

iterate through the spreadsheet rows



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# File 'lib/princess/excelx_reader.rb', line 34

def each
  @rows.each do |noko_row|
    if noko_row.nil?
      yield Row.new([])
    else
      yield Row.new(extract_row_values(noko_row))
    end
  end
end

#row(num) ⇒ Object

return the specified row



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# File 'lib/princess/excelx_reader.rb', line 45

def row(num)
  raise 'invalid argument' if !num.is_a?(Integer)
  return Row.new([]) if @rows[num - 1].nil?
  Row.new(extract_row_values(@rows[num - 1]))
end