Convert mdo+kec from the command line (#116)

cmd/kareljs

@@ -6,6 +6,7 @@ var program = require('commander');
 var fs = require('fs');
 var version = require('../package.json').version;
 var karel = require('../js/karel.js');
+var util = require("../js/util.js");
 
 function readStdin() {
   return new Promise(function(resolve, reject) {
@@ -76,10 +77,17 @@ program
 .action(function(options){
   readStdin()
     .then(stdin => {
-      return require("../js/util.js").Draw(stdin, options.output, options);
+      return util.Draw(stdin, options.output, options);
     });
 });
 
+program
+.command('convert <mdo> <kec>')
+.description('Converts a .kec with its .mdo into a karel.js XML.')
+.action(function(mdoPath, kecPath){
+  process.stdout.write(util.ImportMdoKec(mdoPath, kecPath).save());
+});
+
 program.parse(process.argv);
 
 // vim: set expandtab:ts=2:sw=2

js/util.js

@@ -55,6 +55,23 @@ var Draw = function(worldString, outputFile, opts) {
   return doneWriting;
 };
 
+// Takes the path to a pair of .mdo and .kec files and returns a karel.js world.
+var ImportMdoKec = function(mdoPath, kecPath) {
+  var bufferToUint16Array = function(b) {
+    return new Uint16Array(b.buffer, b.byteOffset,
+                           b.byteLength / Uint16Array.BYTES_PER_ELEMENT);
+  };
+
+  var mdo = bufferToUint16Array(fs.readFileSync(mdoPath));
+  var kec = bufferToUint16Array(fs.readFileSync(kecPath));
+
+  var world = new karel.World(100, 100);
+  world.import(mdo, kec);
+
+  return world;
+};
+
 if (typeof exports !== 'undefined') {
   exports.Draw = Draw;
+  exports.ImportMdoKec = ImportMdoKec;
 }

test/mdokec/apagón.in

@@ -0,0 +1,20 @@
+<ejecucion>
+	<condiciones instruccionesMaximasAEjecutar="10000000" longitudStack="65000"/>
+	<mundos>
+		<mundo nombre="mundo_0" ancho="100" alto="100">
+			<pared x1="6" y1="10" x2="7"/>
+			<pared x1="4" y1="10" y2="11"/>
+			<pared x1="2" y1="11" y2="12"/>
+			<pared x1="4" y1="12" x2="5"/>
+			<pared x1="6" y1="11" y2="12"/>
+			<pared x1="2" y1="14" x2="3"/>
+			<pared x1="7" y1="13" y2="14"/>
+			<posicionDump x="6" y="12"/>
+		</mundo>
+	</mundos>
+	<programas tipoEjecucion="CONTINUA" intruccionesCambioContexto="1" milisegundosParaPasoAutomatico="0">
+		<programa nombre="p1" ruta="{$2$}" mundoDeEjecucion="mundo_0" xKarel="6" yKarel="9" direccionKarel="NORTE" mochilaKarel="INFINITO">
+			<despliega tipo="MUNDO"/>
+		</programa>
+	</programas>
+</ejecucion>

test/problems.js

@@ -68,3 +68,26 @@ describe('draw worlds', function() {
     });
   });
 });
+
+describe('import old mdo+kec', function() {
+  var oldCases = fs.readdirSync('test/mdokec');
+
+  oldCases.forEach(function(casename) {
+    if (!casename.endsWith('.in')) return;
+
+    it(casename.slice(0, -3), function() {
+      var inPath = 'test/mdokec/' + casename;
+      var mdoPath = inPath.slice(0, -3) + '.mdo';
+      var kecPath = inPath.slice(0, -3) + '.kec';
+
+      var world = util.ImportMdoKec(mdoPath, kecPath);
+
+      var output = world.save().replace(/\s+/g, '');
+
+      var expectedOutput =
+          fs.readFileSync(inPath, {encoding: 'utf-8'}).replace(/\s+/g, '');
+
+      assert.equal(output, expectedOutput);
+    });
+  });
+});