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66 lines
1.7 KiB
Ruby
66 lines
1.7 KiB
Ruby
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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filename = file.original_filename
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file_path = file.path
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if file.class == Paperclip::Attachment && file.is_stored_on_s3?
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fa = file.fetch
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file_path = fa.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 Excel parcel was replaced with Creek, but it can be enabled back,
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# just swap lines below. But only one can be enabled at the same time.
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Roo::Excelx.new(file_path)
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# Creek::Book.new(file_path).sheets[0]
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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
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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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i = 1
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rows.each do |row_values|
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# Creek XLSX parser returns Hash of the row, Roo - Array
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row = parse_row(row_values, sheet)
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header = row if i == 1 && row
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columns = row if i == 2 && row
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i += 1
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break if i > 2
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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)
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# Creek XLSX parser returns Hash of the row, Roo - Array
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if row.is_a?(Hash)
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row.values.map(&:to_s)
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elsif sheet.is_a?(Roo::Excelx)
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row.map { |cell| cell.value.to_s }
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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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