Class: TypedPrint::Table

Inherits:
Object
  • Object
show all
Defined in:
lib/typed_print/table.rb

Instance Method Summary collapse

Constructor Details

#initialize(data, alignments = {}, only_columns = nil, custom_headers = {}) ⇒ Table

Returns a new instance of Table.



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# File 'lib/typed_print/table.rb', line 5

def initialize(data, alignments = {}, only_columns = nil, custom_headers = {})
  @data = data
  @alignments = alignments
  @only_columns = only_columns&.map(&:to_sym)
  @custom_headers = custom_headers.transform_keys(&:to_sym)

  @headers = determine_headers
end

Instance Method Details

#render ⇒ Object 



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# File 'lib/typed_print/table.rb', line 14

def render
  return "" if @data.empty?

  # Build rows
  rows = @data.map { |row| @headers.map { |h| format_value(row[h]) } }

  # Build header strings (with custom headers or capitalized defaults)
  header_strings = @headers.map do |h|
    if @custom_headers[h]
      @custom_headers[h]
    else
      # Capitalize each word in the header
      h.to_s.split('_').map(&:capitalize).join(' ')
    end
  end

  # Calculate column widths
  column_widths = header_strings.map(&:length)
  rows.each do |row|
    row.each_with_index do |cell, i|
      column_widths[i] = [column_widths[i], cell.length].max
    end
  end

  # Build output
  output = []
  output << format_row(header_strings, column_widths, :center)
  output << separator(column_widths)
  rows.each do |row|
    output << format_row(row, column_widths)
  end

  output.join("\n")
end