package restx.shell.commands;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import restx.shell.RestxShell;
import restx.shell.ShellCommand;
import restx.shell.ShellCommandRunner;
import restx.shell.StdShellCommand;
import java.io.IOException;
import java.util.List;
import java.util.Set;
/**
* User: xavierhanin
* Date: 4/9/13
* Time: 10:11 PM
*/
public class HelpCommand extends StdShellCommand {
private final Set<ShellCommand> commands;
public HelpCommand(Set<ShellCommand> commands) {
super(ImmutableList.of("help", "man"), "provides list of commands or a command manual");
this.commands = commands;
}
@Override
protected Optional<? extends ShellCommandRunner> doMatch(String line) {
final List<String> args = splitArgs(line);
if (args.size() > 1) {
return Optional.of(new ShellCommandRunner() {
@Override
public void run(RestxShell shell) throws IOException {
man(shell, args.get(1));
}
});
} else {
return Optional.of(new ShellCommandRunner() {
@Override
public void run(RestxShell shell) throws IOException {
for (ShellCommand command : commands) {
command.help(shell);
}
shell.println("");
shell.println("use `help <command>` with any of these commands to get a detailed man on the command");
shell.println("");
shell.println("you can use command completion with <TAB> and command history with <UP> <DOWN> and CTRL+R");
}
});
}
}
private void man(RestxShell shell, String command) throws IOException {
for (ShellCommand shellCommand : commands) {
if (shellCommand.getAliases().contains(command)) {
shellCommand.man(shell);
return;
}
}
if (getAliases().contains(command)) {
man(shell);
} else {
shell.println("command not found: `" + command + "`. use `help` to get the list of available commands.");
}
}
}