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package bjc.utils.cli.fds;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintStream;
import bjc.utils.ioutils.Block;
import bjc.utils.ioutils.BlockReader;
/**
* Runs a FDS (FDiskScript) interface.
*
* This is a rudimentary console interface inspired heavily by FDisk's interface
* style.
*
* Commands are denoted by a single character, but can invoke submodes.
*
* @author bjculkin
*
*/
public class FDS {
/**
* Run a provided FDS mode until it is exited or there is no more input.
*
* @param comin
* The command input source for the FDS mode.
*
* @param datain
* The data input source for the FDS mode.
*
* @param out
* The output source for the FDS mode.
*
* @param initialMode
* The mode to start in.
*
* @param initialState
* The initial state for the mode.
*
* @return The final state of the mode.
*
* @throws FDSException
* If something went wrong during mode execution.
*/
public static <S> S runFDS(InputStream comin, InputStream datain, OutputStream out, FDSMode<S> initialMode,
S initialState) throws FDSException {
PrintStream printer = new PrintStream(out);
try (BlockReader blockSource = new BlockReader("\\R", new InputStreamReader(comin))) {
printer.print("Enter a command (m for help): ");
while (blockSource.hasNext()) {
Block comBlock = blockSource.next();
String comString = comBlock.contents.trim();
char comChar = comString.charAt(0);
printer.println(String.format("\nRecieved command '%s'\n", comChar));
printer.print("Enter a command (m for help): ");
}
} catch (Exception ex) {
throw new FDSException("Unexpected I/O error", ex);
}
return initialState;
}
}
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