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package com.woorea.openstack.console;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import jline.UnsupportedTerminal;
import jline.console.ConsoleReader;
import jline.console.completer.Completer;
import jline.console.completer.StringsCompleter;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
public class Console {
private Properties properties;
private ConsoleReader reader;
private Environment environment;
private HelpFormatter helpFormatter = new HelpFormatter();
private static final CommandLineParser PARSER = new GnuParser();
public Console(Environment environment, Properties properties) {
this.properties = properties;
this.environment = environment;
}
public void start() throws IOException {
if(System.console() == null) {
reader = new ConsoleReader(System.in, System.out, new UnsupportedTerminal());
} else {
reader = new ConsoleReader();
}
do {
String line = reader.readLine(environment.getPrompt());
execute(line);
} while(true);
}
public void execute(String line) {
String[] tokens = CommandLineHelper.parse(line);
if(tokens.length > 0) {
Command command = environment.commands.get(tokens[0]);
if(command != null) {
try {
CommandLine args = Console.PARSER.parse(command.getOptions(), Arrays.copyOfRange(tokens, 1, tokens.length));
command.execute(this, args);
} catch (Exception e) {
e.printStackTrace();
helpFormatter.printHelp(command.name, command.getOptions());
}
}
}
}
public void setEnvironment(Environment environment) {
Set<Completer> completers = new HashSet<Completer>(reader.getCompleters());
for(Completer c : completers) {
reader.removeCompleter(c);
}
Set<String> commands = new HashSet<String>();
for(Map.Entry<String,Command> c : environment.commands.entrySet()) {
commands.add(c.getKey());
}
reader.addCompleter(new StringsCompleter(commands));
this.environment = environment;
}
public Environment getEnvironment() {
return this.environment;
}
/**
* @return the properties
*/
public String getProperty(String name) {
return properties.getProperty(name);
}
/**
* @return the properties
*/
public void setProperty(String name, Object value) {
properties.put(name, value);
}
public void properties() {
for(Map.Entry<Object, Object> entry : properties.entrySet()) {
System.out.printf("%25s = %55s",entry.getKey(), entry.getValue());
}
}
public void exit() {
if(environment.parent == null) {
System.out.println("Goodbye");
System.exit(1);
} else {
environment = environment.parent;
}
}
}
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