include a basic limited implementation of vsprintf

Author: Oscar Otero

README.md

@@ -48,15 +48,18 @@ You can add variables to the translations. For example:
 translator.gettext('hello :who', {':who': 'world'}); //ola world
 ```
 
-To use vsprintf, just install one of the available implementations, for example [sprintf](https://github.com/alexei/sprintf.js) and assign the function as the value of `vsprintf` property.
+There's also a basic support o sprintf (only `%s` and `%d`)
 
 ```js
-const sprintf = require('sprintf-js);
+translator.gettext('hello %s', 'world'); //ola world
+```
 
-translator.vsprintf = sprintf.vsprintf;
+To customize the translator formatter, just override the `format` method:
 
-translator.gettext('Hello %s', 'world'); //Hello world
-translator.ngettext('One comment', '%s comments', 12, 12); //12 comments
+```js
+translator.format = function (text, ...args) {
+    //Your custom format here
+}
 ```
 
 ## Short names

package.json

@@ -26,7 +26,6 @@
     "@babel/preset-env": "^7.6.3",
     "@babel/register": "^7.6.2",
     "mocha": "^6.2.2",
-    "prettier": "^1.18.2",
-    "sprintf-js": "^1.0.3"
+    "prettier": "^1.18.2"
   }
 }

src/translator.js

@@ -116,11 +116,19 @@ export default class Translator {
             return text;
         }
 
-        if (this.vsprintf) {
-            return this.vsprintf(text, args);
-        }
+        return text.replace(/(%[sd])/g, function(match) {
+            if (!args.length) {
+                return match;
+            }
+
+            switch (match) {
+                case '%s':
+                    return args.shift();
 
-        return text;
+                case '%d':
+                    return parseFloat(args.shift());
+            }
+        });
     }
 
     translate(domain, context, original) {
@@ -180,3 +188,22 @@ function mergeTranslations(translations, newTranslations) {
         }
     }
 }
+
+function vsprintf(string, args) {
+    const replace = [].concat(args || []);
+
+    return string.replace(/(%[sd])/g, function(match) {
+        console.log(replace);
+        if (!replace.length) {
+            return match;
+        }
+
+        if (match === '%s') {
+            return replace.shift();
+        }
+
+        if (match === '%d') {
+            return ParseFloat(replace.shift());
+        }
+    });
+}