Class: CsvPatch::Revision

Inherits:
Operation show all
Defined in:
lib/csv_patch/revision.rb

Constant Summary collapse

EMPTY_LINE = 
"\n"

Instance Method Summary collapse

Methods inherited from Operation

#csv_line, #csv_values

Constructor Details

#initialize(changes, output_stream) ⇒ Revision

Returns a new instance of Revision.



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# File 'lib/csv_patch/revision.rb', line 9

def initialize changes, output_stream
  @output_stream  = output_stream
  @changes        = changes

  header_line(EMPTY_LINE)
end

Instance Method Details

#add_new_lines ⇒ Object 



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# File 'lib/csv_patch/revision.rb', line 27

def add_new_lines
  @changes.values.each do |addition|
    emit generate_new_row(addition)
  end
end

#column_metadata ⇒ Object 



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# File 'lib/csv_patch/revision.rb', line 33

def column_metadata
  { columns: @columns, empty_columns: @empty_columns }
end

#header_line(line) ⇒ Object 



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# File 'lib/csv_patch/revision.rb', line 16

def header_line line
  return unless line

  @columns = csv_values(line)
  mark_all_columns_empty
end

#replace_line(line) ⇒ Object 



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# File 'lib/csv_patch/revision.rb', line 23

def replace_line line
  emit replacement_line_for csv_values(line)
end