Class: DriveTime::FieldExpander

Inherits:
Object
  • Object
show all
Defined in:
lib/drive_time/field_expander.rb

Instance Method Summary collapse

Constructor Details

#initialize(loader) ⇒ FieldExpander

Returns a new instance of FieldExpander.



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# File 'lib/drive_time/field_expander.rb', line 9

def initialize(loader)
  @loader = loader
end

Instance Method Details

#expand(value, model_key) ⇒ Object 



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# File 'lib/drive_time/field_expander.rb', line 13

def expand(value, model_key)
  filename = model_key
  # Check for token
  match = /\[(.*?)\]/.match(value)
  # Expand token into file
  # Is there a different filename defined in hard brackets [file_name]
  if match
    filename = match[1]
    value = value.split('[').first
  end

  if value == 'expand_file'
    file = @loader.load_file_direct(filename+'.txt');
    if file.blank?
      raise TokenExpansionError, "Missing file named: #{filename} when expanding from value: #{value} in model: #{model_key}"
    end
    value = expand_file(file)
  elsif value == 'expand_spreadsheet'
    spreadsheet = @loader.load_spreadsheet_direct(filename)
    if spreadsheet.blank?
      raise TokenExpansionError, "Missing spreadsheet named: #{filename} when expanding from value: #{value} in model: #{model_key}"
    end
    # Use first Worksheet
    worksheet = spreadsheet.worksheets[0]
    value = expand_worksheet(worksheet)
  else
    raise TokenExpansionError, "Don't know how to expand the value #{value} for model: #{model_key}"
  end
  return value
end