added string interpolation support

example.js

@@ -1,14 +1,88 @@
+'use strict';
+
+require('date-utils');
 var Acho = require('./index.js');
+var setDateout = require('set-dateout');
+
+var base = new Acho({
+  align: true
+});
+
+var diff = new Acho({
+  diff: true
+});
+
+var label = new Acho({
+  align: false,
+  keyword: 'worker#1'
+});
+
+var colors = new Acho({
+  color: false
+});
 
-var acho = new Acho({
-  level: 'silly',
-  color: true
+var visit = new Acho({
+  keyword: 'visit'
 });
 
-acho.error('error message');
-acho.warning('warning message');
-acho.success('success message');
-acho.info('info message');
-acho.verbose('verbose message');
-acho.debug('debug message');
-acho.silly('silly message');
+var getStep = (function() {
+  var start = 0;
+  return function(value) {
+    if (value) start += value;
+    else ++start;
+    return start;
+  };
+})();
+
+var messageTimeout = (function() {
+  return function(level, message, logger, time) {
+    setDateout(function() {
+      logger[level](message);
+    }, new Date().add({seconds: getStep(0.8)}));
+  };
+})();
+
+var lineBreakTimeout = (function() {
+  return function(time) {
+    setDateout(function() {
+      console.log();
+    }, new Date().add({seconds: getStep(time || 0.2)}));
+  };
+})();
+
+messageTimeout('info', 'Simple', base);
+messageTimeout('success', 'Tiny', base);
+messageTimeout('verbose', 'Customizable', base);
+messageTimeout('silly', 'Logger for NodeJS and Browser', base);
+messageTimeout('warn', 'in less than...', base);
+messageTimeout('error', '10KB!.', base);
+
+lineBreakTimeout(1);
+
+messageTimeout('info', 'Do you wanna to know more?', base);
+
+lineBreakTimeout();
+
+messageTimeout('success', 'support diff', diff);
+messageTimeout('success', 'between messages', diff);
+
+lineBreakTimeout();
+
+messageTimeout('warn', 'adapt the logger label', label);
+messageTimeout('warn', 'easily', label);
+
+lineBreakTimeout();
+
+messageTimeout('error', 'automatically color disabled', colors);
+messageTimeout('error', 'under production', colors);
+
+lineBreakTimeout();
+
+messageTimeout('silly', 'and more more more...', base);
+messageTimeout('debug', 'string interpolation', base);
+messageTimeout('verbose', 'logs align', base);
+messageTimeout('info', 'custom levels and transports', base);
+
+lineBreakTimeout();
+
+messageTimeout('success', 'https://github.com/Kikobeats/acho', visit);

lib/Acho.coffee

@@ -2,6 +2,7 @@
 
 chalk    = require 'chalk'
 DEFAULT  = require './Default'
+format   = require 'format-util'
 
 module.exports = class Acho
 
@@ -26,11 +27,13 @@ module.exports = class Acho
       messages
     this
 
-  push: (type, message) ->
+  push: (type, messages...) ->
+    message = @_format messages
     @messages[type].push message
     this
 
-  add: (type, message) ->
+  add: (type, messages...) ->
+    message = @_format messages
     @[type] message
     @push type, message
     this
@@ -46,3 +49,7 @@ module.exports = class Acho
     return true if @level is DEFAULT.UNMUTED
     return false if @level is DEFAULT.MUTED
     @types[type].level <= @types[@level].level
+
+  _format: (messages) ->
+    format.apply null, messages
+

lib/Default.coffee

@@ -38,7 +38,8 @@ module.exports =
     messageType + message
 
   GENERATE_TYPE_MESSAGE: (type) ->
-    (message) =>
+    (message...) =>
+      message = @_format message
       @transport @generateMessage type, message
       this
 

package.json

@@ -21,16 +21,19 @@
   "dependencies": {
     "chalk": "*",
     "coffee-script": "*",
+    "format-util": "*",
     "pretty-ms": "*"
   },
   "devDependencies": {
     "browserify": "*",
     "coffeeify": "*",
+    "date-utils": "*",
     "gulp": "*",
     "gulp-header": "*",
     "gulp-uglify": "*",
     "gulp-util": "*",
     "mocha": "*",
+    "set-dateout": "*",
     "should": "*",
     "titleize": "*",
     "vinyl-buffer": "*",