enhanced: console example

examples/node/console.js

@@ -9,28 +9,34 @@
 
 'use strict';
 
-    // Event bus is the only connection between functional modules.
+// Event bus is the only connection between functional modules.
 var bus = require('eventist')();
 var emit = bus.emit;
 var logging = true;
+var pendingInput = null;
 
 //  Override the original method for logging purposes.
 bus.emit = function () {
-  logging && emit.apply(bus, ['ui', 'log', Array.prototype.join.call(arguments, '::')]);
+  logging &&
+  emit.apply(bus, ['ui', 'log', Array.prototype.join.call(arguments, '::')]);
+
   return emit.apply(bus, arguments);
 };
 
 /*
-  Application logic:
-  - maintaining dynamic configuration and connections between modules;
-  - implementing some functions of existential significance.
+ Application logic:
+ - maintaining dynamic configuration and connections between modules;
+ - implementing some functions of existential significance.
  */
 bus
-  .on('module.connected', function () {
+  .on('module.connected', function (name) {
+    if (name === 'decoder') {
+      bus.send('user', pendingInput);
+    }
     return true;
   })
   .once('module.quit', function (name) {
-    // Make a dramatic farewell before finishing the seppuku.
+    // Make a dramatic farewell during committing seppuku.
     bus.send('ui', 'say',
       ['Ewwww... you have killed my', name, '!!!  :,('].join(' '));
     var left = 9
@@ -47,6 +53,14 @@ bus
         };
     die();
   })
+  //  Here we simulate the lazy loading scenario.
+  .once('user', function (input) {
+    bus.send('ui', 'say', 'Did you say "' + (pendingInput = input) + '"?');
+    bus.send('ui', 'say', 'Just a second - the interpreter is being loaded...');
+    setTimeout(function () {
+      require('./decoder')(bus);
+    }, 1000);
+  })
   //  Some application-level events are handled here.
   .on('app', function (cmd, a) {
     switch (cmd) {
@@ -71,9 +85,7 @@ bus
     return true;
   });
 
-// Here we load functional modules
-
+// Load functional modules
 require('./ui-simple')(bus);
-require('./decoder')(bus);
 // And now we are good to go...
 bus.send('ui', 'prompt');

examples/node/decoder/index.js

@@ -17,7 +17,7 @@ var decode;
  *
  * @param {string} command
  */
-var lastTry = function(command){
+var lastTry = function (command) {
 
   var res = !retry && bus.emit('app', 'bad-user', command);
 
@@ -26,7 +26,7 @@ var lastTry = function(command){
   } else if (tolerance) {
     bus.send('ui', 'say',
       ['I do not understand! Type "help", if you mind...',
-        tolerance, 'try left.'].join(' '));
+        tolerance, 'try is left.'].join(' '));
     --tolerance;
     bus.send('ui', 'prompt');
   } else {              // Module suicide - letting the whole world to know.
@@ -36,9 +36,12 @@ var lastTry = function(command){
   }
 };
 
-/* jshint maxcomplexity:10 */
+//  Handle the 'user' events and return true to indicate it's done.
+/* jshint maxcomplexity:12 */
 decode = function (command) {
 
+  command = command.trim();
+
   switch (command) {
     case 'help':
       bus.send('ui', 'say',
@@ -71,6 +74,9 @@ decode = function (command) {
       bus.send('app', 'close');
       break;
 
+    case '':
+      break;
+
     default:
       return lastTry(command);
   }

examples/node/ui-simple/index.js

@@ -3,14 +3,24 @@
  * and performs rudimentary output functions.
  *
  * @author Villem Alango <villem.alango@gmail.com>
-*/
+ */
 
 'use strict';
 
 var B = '\u001B[34m'; // blue
 var G = '\u001B[32m'; // green
 var M = '\u001B[35m'; // magenta
 var R = '\u001B[39m'; // reset
+var helloText = [
+  'Hey, I am a simple terminal-style interpreter demo.',
+  'You type something in and I shall do something... not dangerous.',
+  'Meaning of the colors:',
+  G + '    - your input;',
+  B + '    - internal events log;',
+  M + '    - my responses.',
+  R + 'Good luck!',
+  ''];
+
 var name     = 'ui-simple'
   , bus
   , prompt   = 'OHAI'
@@ -64,6 +74,7 @@ var init = function (busInstance) {
 
   clear();
   setPrompt('OHAI');
+  console.log(helloText.join('\n'));
 
   //  Actual input feed event listener.
   rl.on('line', function (line) {