@Override
/**
* ******************************************************************* Method that gets mixed
* message and the file to unmix the message
*
* @param filename file that contains the undo commands to revert message to original
* @param userMessage mixed message that is returned from the mix program
* @return unmix original message before mixing it up
* ******************************************************************
*/
public String UnMixUsingFile(String filename, String userMessage) {
if (userMessage.trim().equals("")) {
throw new IllegalArgumentException();
}
String str;
String unmix = userMessage;
Mix mix = new Mix();
// calls the mix command and then sets the unmix message
// provided as the usermessage on mix class -> pretty much did
// the same thing so I guessed I could use this for easier process.
mix.setInitialMessage(userMessage);
// sets the filename output extension if it was not provided
if (!filename.contains(".txt")) {
filename = filename + ".txt";
}
try {
// open the data file
Scanner fileReader = new Scanner(new File(filename));
LinkList<String> commands = new LinkList<String>();
// goes through the file and adds it to the linked if it hasNextLine()
while (fileReader.hasNextLine()) {
str = fileReader.nextLine();
commands.addfirst(str);
}
// goes through the linked list and process each
// command to unmix the commands
for (int i = 0; i < commands.count(); i++) {
String s = commands.readList(i).getData();
unmix = mix.processCommand(s);
}
return unmix;
}
// could not find file
catch (FileNotFoundException error) {
throw new IllegalArgumentException();
}
// problem reading the file
catch (Exception error) {
throw error;
}
}
