Contents

module TableImporter

  class RooSpreadsheetSource < Source

    def get_headers
      @headers
    end

    def get_preview_lines(start_point = 0, end_point = 10)
      begin
        @headers = @mapping.present? && @mapping != false ? convert_headers : @headers
        lines = clean_chunks([get_lines(start_point, end_point)], @compulsory_headers)[0][:lines]
        if lines.first.nil?
          get_preview_lines(start_point+10, end_point+10)
        else
          lines[0..8]
        end
      rescue SystemStackError, NoMethodError
        raise TableImporter::EmptyFileImportError.new
      end
    end

    def get_lines(start, number_of_lines)
      @last_row ||= @file.last_row
      finish = [@last_row, start + number_of_lines].min
      mapped_lines = []
      (start...finish).each do |row_number|
        mapped_lines << Hash[@headers.zip(@file.row(row_number + 1))]
      end
      mapped_lines
    end

    def convert_headers
      new_headers = @headers_present ? @file.row(1) : default_headers
      new_headers = default_headers(new_headers.count)
      return new_headers unless @mapping
      @mapping.each do |key, value|
        if value.to_i.to_s == value.to_s
          new_headers[value.to_i] = key.to_sym
        end
      end
      new_headers
    end

    def get_chunks(chunk_size)
      @headers = convert_headers
      @last_row ||= @file.last_row
      chunks = []
      start_point = @headers_present ? 2 : 1
      while chunks.count <= @last_row/chunk_size
        chunks << get_lines(start_point, chunk_size)
        start_point += chunk_size
      end
      chunks.last << Hash[@headers.zip(@file.row(@last_row))]
      clean_chunks(chunks, @compulsory_headers)
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
table_importer-0.2.1	lib/table_importer/roo_spreadsheet_source.rb