package com.pugh.sockso.commands;
import com.pugh.sockso.Properties;
import com.pugh.sockso.db.Database;
import com.pugh.sockso.music.CollectionManager;
import com.pugh.sockso.resources.Locale;
import org.apache.log4j.Logger;
import com.google.inject.Inject;
/**
* Executes console commands
*
*/
public class CommandExecuter {
private final static Logger log = Logger.getLogger( CommandExecuter.class );
private final Database db;
private final Properties p;
private final CollectionManager cm;
private final Locale locale;
private final Command[] commands;
private final CommandParser parser;
@Inject
public CommandExecuter( final Database db, final Properties p, final CollectionManager cm, final Locale locale, CommandParser parser ) {
this.db = db;
this.p = p;
this.cm = cm;
this.locale = locale;
this.parser = parser;
commands = new Command[] {
new UserList( db ),
new UserAdd( db, locale ),
new UserDel( db, locale ),
new UserAdmin( db, locale ),
new UserActive( db, locale ),
new ColAdd( cm, locale ),
new ColDel( cm, locale ),
new ColList( db ),
new ColScan( cm, db ),
new PropSet( p, locale ),
new PropDel( p, locale ),
new PropList( p ),
new Version(),
new Exit()
};
}
/**
* Executes a command and returns the results
*
* @param command
*
* @return
*
*/
public String execute( final String command ) throws Exception {
final String[] args = parser.parseCommand( command );
final String name = args.length > 0 ? args[0] : "";
for ( final Command cmd : commands ) {
if ( cmd.getName().equals(name) ) {
return runCommand( cmd, args );
}
}
return getCommands();
}
/**
* Runs a command with the specified arguments (if they are all present)
*
* @param cmd
* @param args
*
* @return
*
* @throws Exception
*
*/
protected String runCommand( final Command cmd, final String[] args ) throws Exception {
final int numArgs = args.length - 1;
if ( cmd.getNumArgs() != -1 && cmd.getNumArgs() != numArgs ) {
return "This command requires " +cmd.getNumArgs()+ " arguments";
}
log.debug( "Executing Command: '" +cmd.getName()+ "'" );
return cmd.execute( args );
}
/**
* Returns a description of the possible commands
*
* @return
*
*/
protected String getCommands() {
final String[] lines = new String[ commands.length ];
final StringBuffer sb = new StringBuffer();
int longest = 0;
sb.append( locale.getString("con.desc.commands") ).append( "\n" );
for ( int i=0; i<commands.length; i++ ) {
final Command cmd = commands[ i ];
final StringBuffer lb = new StringBuffer();
lb.append( " " );
lb.append( cmd.getName() );
for ( final String argument : cmd.getArguments() ) {
lb.append( " " );
lb.append( argument );
}
if ( lb.length() > longest ) {
longest = lb.length();
}
lines[ i ] = lb.toString();
}
for ( int i=0; i<lines.length; i++ ) {
final String line = lines[ i ];
sb.append( line );
for ( int j=longest+5; j>line.length(); j-- ) {
sb.append( " " );
}
sb.append( commands[i].getDescription() );
sb.append( "\n" );
}
return sb.toString();
}
}