/**
* Prompt to confirm that the user wants to delete the JShellItem from the file system. If so,
* remove it. If -f is supplied, do not prompt and confirm. If the root directory is specified,
* its contents but not itself will be subject to deletion.
*
* @param paths the JShellItem to be removed.
*/
public void rm(List<String> paths) throws Exception {
// Loop through the user inputs.
for (String path : paths) {
// Initialize the current JShellItem.
JShellItem item = getItemAtPath(path, 0);
if (item == null) {
System.out.printf("%s: does not exist.\n", path);
} else {
// Keep track of the size of that JShellItem.
int size = item.getSize();
if (size > 0) {
List<String> recursiveList = recurseOnPath(path, true);
rm(recursiveList.subList(0, size + 1));
if (item.getSize() == 0) {
rm(recursiveList.subList(size + 1, size + 2));
}
} else {
if (item.getPath().equals("/")) {
return;
}
// Check the -f option.
if (!currentOptions_.equals("f")) {
System.out.printf(
"Really remove %s from %s? (y/n) ",
item.getName(), item.getParentDirectory().getPath());
// Read the user input.
ArrayList<String> in = readInput();
// If 'y'
if (in.toString().equals("[y]")) {
item.getParentDirectory().removeItem(item);
// if not 'n', ask again.
} else if (!in.toString().equals("[n]")) {
List<String> tempStore = new ArrayList<String>();
tempStore.add(path);
rm(tempStore);
}
// If -f is specified.
} else {
item.getParentDirectory().removeItem(item);
}
}
}
}
}
/**
* Prints the path of the files specified by the paths argument that contain a string that matches
* regex, followed by the particular line.
*
* @param regex is a String regular expression.
* @param paths is a List of paths.
*/
public String grep(String regex, List<String> paths) throws Exception {
if (regex.startsWith("\"")) {
int i = 0;
for (i = 0; i < paths.size() && !regex.endsWith("\""); i++) regex += " " + paths.get(i);
regex = regex.substring(1, regex.length() - 1);
paths = paths.subList(i, paths.size());
}
if (paths.isEmpty()) throw new Exception("Usage: grep [OPTION]... PATTERN [FILE]...");
String results = "";
for (String path : paths) {
JShellItem item = getItemAtPath(path, 0);
if (item.getSize() > 0 && currentOptions_.equals("R")) {
results += grep(regex, recurseOnPath(path, true).subList(0, item.getSize()));
} else if (item instanceof File) {
String content = ((File) item).getContent();
if (content.contains(regex)) {
if (!results.isEmpty()) results += "\n";
results += item.getPath() + ":\n";
for (String line : content.split("\\n")) {
if (line.contains(regex)) {
results += line + "\n";
}
}
results = results.substring(0, results.length() - 1);
}
} else if (item instanceof Directory && !currentOptions_.equals("R")) {
results += "Cannot call grep on a directory without -R.";
} else {
results += "";
}
}
return results;
}
