Continue work on FDS

1 files changed, 61 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSUtils.java b/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSUtils.java
new file mode 100644
index 0000000..ec8cea8
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/cli/fds/FDSUtils.java
@@ -0,0 +1,61 @@
+package bjc.utils.cli.fds;
+
+import static bjc.utils.ioutils.BlockReaders.pushback;
+import static bjc.utils.ioutils.BlockReaders.simple;
+import static bjc.utils.ioutils.BlockReaders.trigger;
+
+import java.io.PrintStream;
+import java.io.Reader;
+
+import bjc.utils.cli.fds.FDSState.InputMode;
+import bjc.utils.ioutils.BlockReader;
+import bjc.utils.ioutils.Prompter;
+import bjc.utils.ioutils.PushbackBlockReader;
+
+/**
+ * Utilities for dealing with FDS
+ * 
+ * @author bjculkin
+ *
+ */
+public class FDSUtils {
+	/**
+	 * Run a FDS instance from a reader.
+	 * 
+	 * @param reader
+	 *                The reader to use.
+	 * 
+	 * @param out
+	 *                The output stream to use.
+	 * 
+	 * @param mode
+	 *                The mode to use.
+	 * 
+	 * @param ctx
+	 *                The initial state.
+	 * 
+	 * @return The final state.
+	 * 
+	 * @throws FDSException
+	 *                 If something goes wrong.
+	 */
+	public static <S> S runFromReader(Reader reader, PrintStream out, FDSMode<S> mode, S ctx) throws FDSException {
+		BlockReader input = simple("\\R", reader);
+
+		Prompter comPrompter = new Prompter("Enter a command (m for help): ", out);
+		Prompter dataPrompter = new Prompter("> ", out);
+
+		BlockReader rawComInput = trigger(input, comPrompter);
+		BlockReader rawDataInput = trigger(input, dataPrompter);
+
+		PushbackBlockReader comInput = pushback(rawComInput);
+		PushbackBlockReader dataInput = pushback(rawDataInput);
+
+		FDSState<S> fdsState = new FDSState<>(ctx, InputMode.NORMAL, comInput, dataInput, out);
+		fdsState.modes.push(mode);
+
+		FDS.runFDS(fdsState);
+
+		return ctx;
+	}
+}
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