@Override
public Value apply(Spreadsheet s, List<Expression> args) {
if (args.size() > 0) {
LValue v = (LValue) (args.get(0).evaluate(s));
v.assign(s, null);
} else s.clear();
return null;
}
public static void parse(String command, Spreadsheet spreadsheet) { // method to parse user input
if (command.length() == 2 || command.length() == 3) {
System.out.println(command + " = " + spreadsheet.getValue(command) + "\n");
} else if (command.substring(0, 4).equals("exit")) { // allows user to terminate program
System.out.println("\nFarewell!");
running = false;
} else if (command.substring(0, 5).equals("print")) { // prints spreadsheet
System.out.println();
spreadsheet.drawSpreadsheet();
} else if (command.contains(" = ")) { // set cell values
spreadsheet.setValue(
command.substring(0, command.indexOf(" = ")),
command.substring(command.indexOf(" = ") + 3));
} else if (command.substring(0, 5).equals("clear")) { // clears cells or spreadsheet
if (command.length() > 5) { // clear specific cell
spreadsheet.clearCell(command.substring(6));
} else { // clears entire spreadsheet
spreadsheet.clear();
}
} else if (command.subSequence(0, 4).equals("save")) { // saves spreadsheet to file
try {
PersistenceHelper.save(command.substring(5), spreadsheet);
} catch (Exception e) { // catches file error
System.out.println("Unable to save to path '" + command.substring(5) + "'\n");
}
} else if (command.subSequence(0, 4).equals("load")) { // loads spreadsheet from file
try {
PersistenceHelper.load(command.substring(5), spreadsheet);
} catch (Exception e) { // catches file error
System.out.println("Unable to load from path '" + command.substring(5) + "'\n");
}
} else if (command.substring(0, 5).equals("clash")) {
try {
spreadsheet.clash(command.substring(6));
} catch (IOException | ClashException e) {
System.out.println(
"'" + command.substring(6) + "' is not recognized as a valid clan tag.\n");
}
} else if (command.substring(0, 7).equals("quizlet")) {
try {
spreadsheet.quizlet(command.substring(8));
} catch (IOException e) {
System.out.println(
"Something went wrong when reading Quizlet set #" + command.substring(8) + "\n");
}
} else if (command.substring(0, 4).equals("sort")) {
spreadsheet.sort(command);
} else if (command.substring(0, 6).equals("resize")) {
spreadsheet.resize(command.substring(7));
} else { // notifies user of invalid command
System.out.println("'" + command + "' is not recognized as a valid command.\n");
}
}