Implement enhanced REPL, relates to #13

Add command history and welcome message

1 files changed, 83 insertions, 0 deletions

diff --git a/src/main/com/jantuomi/tunkki/Tunkki.java b/src/main/com/jantuomi/tunkki/Tunkki.java
new file mode 100644
index 0000000..a4120a8
--- /dev/null
+++ b/src/main/com/jantuomi/tunkki/Tunkki.java
@@ -0,0 +1,83 @@
+package com.jantuomi.tunkki;
+
+import com.jantuomi.tunkki.core.CommandLineArgumentContainer;
+import com.jantuomi.tunkki.core.parser.ASTGenerator;
+import com.jantuomi.tunkki.core.parser.Parser;
+import com.jantuomi.tunkki.core.parser.ast.ASTNode;
+import com.jantuomi.tunkki.core.runtime.Interpreter;
+import com.jantuomi.tunkki.core.tokenizer.Tokenizer;
+import com.jantuomi.tunkki.core.tokenizer.token.Token;
+import com.jantuomi.tunkki.exception.TunkkiError;
+import com.jantuomi.tunkki.repl.Repl;
+import org.kohsuke.args4j.CmdLineException;
+import org.kohsuke.args4j.CmdLineParser;
+import sun.awt.X11.XToolkit;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+import java.util.Scanner;
+
+public class Tunkki {
+
+    private static Tunkki instance;
+
+    public Tunkki() {
+        instance = this;
+    }
+
+    public static Tunkki getInstance() {
+        return instance;
+    }
+
+    public void repl() throws InterruptedException, IOException {
+        Repl repl = new Repl(this);
+        repl.run();
+    }
+
+    public void run(String input) throws TunkkiError {
+        Tokenizer tokenizer = Tokenizer.getInstance();
+        List<Token> sequence = tokenizer.tokenize(input);
+
+        Collections.reverse(sequence);
+
+        List<Token> trees = Parser.getInstance().parse(sequence);
+        if (CommandLineArgumentContainer.getInstance().isDebugModeActive()) {
+            Parser.getInstance().printAllTrees(trees);
+        }
+
+        List<ASTNode> nodes = ASTGenerator.getInstance().generate(trees);
+        if (CommandLineArgumentContainer.getInstance().isDebugModeActive()) {
+            ASTGenerator.getInstance().printAllTrees(nodes);
+        }
+
+        String output = Interpreter.execute(nodes);
+
+        if (output.trim().length() > 0) {
+            System.out.println(output);
+        }
+    }
+
+    public boolean parseArguments(String[] args) {
+        CommandLineArgumentContainer container = CommandLineArgumentContainer.getInstance();
+        CmdLineParser parser = new CmdLineParser(container);
+
+
+        try {
+            if (args.length == 0) {
+                throw new CmdLineException("Please provide an argument.");
+            }
+            parser.parseArgument(args);
+        } catch (CmdLineException e) {
+            System.err.println(e.getMessage());
+            parser.printUsage(System.err);
+            return false;
+        }
+
+        return true;
+    }
+
+    public String versionString() {
+        return "ALPHA";
+    }
+}