class Patterns::CreateFile

Creates a file and writes data to it, and provides a command for undoing that operation

Public Class Methods

new(path, data) click to toggle source

Initializes the CreateFile Class

path - The file path to write the file
data - The data to write to the file

Examples

=> create_file_cmd = CreateFile.new(file_path, data_to_write)

Calls superclass method Patterns::Command.new

# File app/models/command/create_file.rb, line 16
def initialize(path, data)
  super("Create File: #{path}")
  @path = path
  @data = data
end

Public Instance Methods

execute() click to toggle source

Creates a file and writes data to it; will overwrite data if the file already exists. This function should probably be called write to file, with optional append instead of overwrite.

Examples

=> create_file_cmd.execute

Calls superclass method Patterns::Command#execute

# File app/models/command/create_file.rb, line 28
def execute
  function = Proc.new do
    f = File.open(@path, 'w')
    f.write @data
    f.close
  end
  super(function)
end

undo() click to toggle source

Undoes file creation; to be more useful, this should probably only remove data if it was appended, and only remove the file if it was created.

Examples

=> create_file_cmd.undo

Calls superclass method Patterns::Command#undo

# File app/models/command/create_file.rb, line 42
def undo
  function = Proc.new do
    File.delete(@path)
  end
  super(function)
end