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68 lines
1.6 KiB
Ruby
68 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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class SpreadsheetParser
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# Based on file's extension opens file (used for importing)
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def self.open_spreadsheet(file)
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file_path = file.path
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filename = if file.class.name.split('::')[-1] == 'UploadedFile'
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file.original_filename
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else
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File.basename(file.path)
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end
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case File.extname(filename)
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when '.csv'
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Roo::CSV.new(file_path, extension: :csv)
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when '.tsv'
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Roo::CSV.new(file_path, csv_options: { col_sep: "\t" })
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when '.txt'
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# This assumption is based purely on biologist's habits
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Roo::CSV.new(file_path, csv_options: { col_sep: "\t" })
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when '.xlsx'
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Roo::Excelx.new(file_path)
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else
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raise TypeError
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end
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end
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def self.spreadsheet_enumerator(sheet)
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if sheet.is_a?(Roo::CSV)
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sheet
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elsif sheet.is_a?(Roo::Excelx)
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sheet.each_row_streaming(pad_cells: true)
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else
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sheet.rows
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end
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end
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def self.first_two_rows(sheet)
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rows = spreadsheet_enumerator(sheet)
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header = []
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columns = []
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rows.take(2).each_with_index do |row_values, i|
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row = parse_row(row_values, sheet, header: i.zero?)
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if row && i.zero?
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header = row
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else
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columns = row
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end
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end
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return header, columns
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end
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def self.parse_row(row, sheet, header: false)
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if sheet.is_a?(Roo::Excelx) && !header
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row.map do |cell|
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if cell.is_a?(Roo::Excelx::Cell::Number) && cell.format == 'General'
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cell&.value&.to_d
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else
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cell&.formatted_value
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end
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end
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else
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row.map(&:to_s)
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end
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end
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end
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