/**
* *************************************************************** @Description - A method used to
* execute input commands entered by the user. It also will display command input errors if
* needed.
*
* @param The text command entered in by the user through the command line. @Returns - (N/A)
* <p>**************************************************************
*/
@Override
public boolean processCommand(String input) {
// --- Variable Declarations ---------------------------//
// determines if system should exit program
boolean exit = false;
/* The identifier received for the command to be executed. */
char commandID;
/* Keeps track of document modifications for saving. */
boolean docChange = false;
// --- Main Routine -------------------------------------//
// Error check that the command is valid.
if ((input.length() > 1 && input.charAt(1) == ' ') || input.length() == 1) {
error = false;
// Extract the first character from the command.
commandID = input.charAt(0);
commandID = Character.toLowerCase(commandID);
// Go through and match a command to run.
switch (commandID) {
// Insert before current line.
case 'b':
saved = false;
command = new BeforeLine();
command.executeCommand(input, CurrentLine);
break;
// Insert after current line.
case 'i':
saved = false;
command = new AfterLine();
command.executeCommand(input, CurrentLine);
break;
// Move current line down a position.
case 'm':
command = new MoveIndicatorDown();
error = command.executeCommand(input, CurrentLine);
break;
// Move current line up 1 position.
case 'u':
command = new MoveIndicatorUp();
error = command.executeCommand(input, CurrentLine);
break;
// Remove the current line.
case 'r':
saved = false;
command = new RemoveCurrentLine();
command.executeCommand(input, CurrentLine);
break;
// Display the project buffer.
case 'd':
clearConsole();
command = new DisplayAllLines();
displayOff = command.executeCommand(input, CurrentLine);
break;
// Clear and remove all lines in buffer.
case 'c':
if (!saved) {
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
System.out.println(
" The document has yet to be saved."
+ "\n Would you like to save it before you exit?[y/n]");
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in));
try {
String save = inputReader.readLine();
save = save.toLowerCase();
if (save.equals("y")) {
try {
System.out.println("\nEnter save command: s <filename>:");
save = inputReader.readLine();
command = new SaveFile();
error = command.executeCommand(save, CurrentLine);
} catch (IOException e) {
System.out.println(
"!!> Oops, There was an error " + "trying to run this command.");
e.printStackTrace();
}
}
} catch (IOException e) {
System.out.println("!!> Oops, There was an error " + "trying to run this command.");
e.printStackTrace();
}
}
saved = false;
command = new ClearLines();
command.executeCommand(input, CurrentLine);
break;
// Save file contents to a file directory.
case 's':
command = new SaveFile();
error = command.executeCommand(input, CurrentLine);
saved = true;
break;
// Load a files contents from a directory.
case 'l':
if (!saved) {
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
System.out.println(
" The document has yet to be saved."
+ "\n Would you like to save it before you exit?[y/n]");
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in));
try {
String save = inputReader.readLine();
save = save.toLowerCase();
if (save.equals("y")) {
try {
System.out.println("\nEnter save command: s <filename>:");
save = inputReader.readLine();
command = new SaveFile();
error = command.executeCommand(save, CurrentLine);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
error = true;
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
error = true;
}
}
command = new ClearLines();
command.executeCommand(input, CurrentLine);
command = new LoadFile();
error = command.executeCommand(input, CurrentLine);
break;
// Display list of commands.
case 'h':
error = true;
command = new Help();
command.executeCommand(input, CurrentLine);
break;
// Exit the editor.
case 'x':
if (input.equals("x")) {
// Check and see if the document has yet to be saved.
if (!saved) {
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
System.out.println(
" The document has yet to be saved."
+ "\n Would you like to save it before you exit?[y/n]");
System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in));
try {
String save = inputReader.readLine();
save = save.toLowerCase();
if (save.equals("y")) {
try {
System.out.println("\nEnter save command: s <filename>:");
save = inputReader.readLine();
command = new SaveFile();
error = command.executeCommand(save, CurrentLine);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("Good bye!");
exit = true;
} else {
error = true;
System.out.println(
"Incorrect Input Format. " + "\nShould be of form: [command] " + "[data_entry]");
System.out.print("\n: ");
}
break;
// Insert after last line.
case 'e':
command = new AfterLast();
command.executeCommand(input, CurrentLine);
break;
// Cut command.
case 'o':
Cut cutCommand = new Cut();
cutCommand.executeCommand(input, CurrentLine, clipBoardLine, documentLineCount);
break;
case 'p':
Paste pasteCommand = new Paste();
pasteCommand.executeCommand(input, CurrentLine, CurrentLine);
break;
// Invalid command entered.
default:
error = true;
System.out.println(
"Incorrect Input Format. " + "\nShould be of form: [command] [data_entry]");
System.out.print("\n: ");
break;
}
if (displayOff) {
error = true;
System.out.print(": ");
}
// Update document flag data.
documentLineCount = textData.size();
// Update the edit flag.
docChange = commandID == 's' ? true : docChange;
}
// Nothing was entered into the buffer.
else {
error = true;
System.out.println("Command does not match an existing command, enter 'h' for help. ");
System.out.print(": ");
}
return exit;
}
