More helpers

README.md

@@ -4,7 +4,7 @@ A small collection of useful helpers for [Handlebars.js](https://github.com/wyca
 
 [![Build Status](https://travis-ci.org/danharper/Handlebars-Helpers.png?branch=develop)](https://travis-ci.org/danharper/Handlebars-Helpers)
 
-This version includes a (very) large API change. Use [version 1.0.0](https://github.com/danharper/Handlebars-Helpers/tree/v1.0.0) if you'd prefer the "classic" style.
+This version includes a (very) large API change. Use [version 1.1.0](https://github.com/danharper/Handlebars-Helpers/tree/v1.1.0) if you'd prefer the "classic" style.
 
 To use, just include `helpers.js` after you include Handlebars. Or, if you're using AMD/Node, just require the file.
 
@@ -106,4 +106,4 @@ Convert new lines (`\r\n`, `\n\r`, `\r`, `\n`) to line breaks
 
 ```
 {{nl2br description}}
-```
+```

package.json

@@ -20,11 +20,13 @@
   "author": "Dan Harper",
   "license": "WTFPL",
   "dependencies": {
-    "handlebars": "1.0.10"
+    "handlebars": "1.0.10",
+    "moment" : "2.7.0"
   },
   "devDependencies": {
     "mocha": "1.8.2",
     "chai": "1.5.0",
-    "sinon": "1.6.0"
+    "sinon": "1.6.0",
+    "moment" : "2.7.0"
   }
 }

src/helpers.js

@@ -28,6 +28,8 @@
         return this.expressions[operator](left, right);
     };
 
+    var moment = require('moment');
+
     var eR = new ExpressionRegistry;
     eR.add('not', function(left, right) {
         return left != right;
@@ -104,6 +106,59 @@
         ));
     });
 
+    /**
+    * Hack for correct display JSON string
+    * {{json context}}
+    */
+    Handlebars.registerHelper('json', function(context) {
+         if(typeof context == 'object'){
+            return JSON.stringify(context, null, 2)
+         }else{
+            var json_obj =  JSON.parse(context);
+            return JSON.stringify(json_obj, null, 2)
+         };
+    }); 
+
+    /**
+    * truncate string to 20 symbols
+    * {{trunc "text"}}
+    */
+    Handlebars.registerHelper('trunc', function(text, symbols) {
+        if (text !=null && text.length >= symbols){
+            return text.substring(0,symbols) + "..."
+        }else{
+            return  false
+        };
+        return text
+    });
+
+    /**
+    * Return only day and month: 26 Nov
+    * {{short_date text}}
+    */
+    Handlebars.registerHelper('short_date', function(text) {
+        var m = new moment(text);
+        if(m.isValid()){
+            return m.format("DD MMM");
+        }else{
+            return false
+        }
+    }); 
+
+    /**
+    * Return day  month and year: 20 June 2014
+    * {{long_date text}}
+    */
+    Handlebars.registerHelper('long_date', function(text) {
+        var m = new moment(text);
+        if (m.isValid()){
+            return m.format("DD MMM YYYY");
+        }else{
+            return false
+        }
+
+    }); 
+
     return eR;
 
 }));

test/helpersTest.js

@@ -2,6 +2,7 @@ var HelpersRegistry = require('../src/helpers');
 
 var chai = require('chai')
 ,	sinon = require('sinon')
+,	moment = require('moment')
 ,	h = require('handlebars');
 
 chai.should();
@@ -189,3 +190,37 @@ describe('Logging', function () {
 		});
 	});
 });
+
+describe('#truncate', function() {
+	it('Truncates output to 20 chars', function() {
+		c('{{trunc text symbols}}', {text:"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur elementum.",symbols:20}).should.equal("Lorem ipsum dolor si...")
+	});
+	it('Returns empty string', function() {
+		c('{{trunc }}').should.equal('')
+	});
+});
+
+describe('#short_date', function() {
+	it('Returns short date', function() {
+		c('{{short_date this}}', '2014-06-20 00:00:00').should.equal('20 Jun')
+	});
+	it('Returns empty string', function() {
+		c('{{short_date this}}', 'qazwsxedc').should.equal("")
+	});
+});
+
+describe('#long_date', function() {
+	it('Returns long date', function() {
+		c('{{long_date this}}', '2014-06-20 00:00:00').should.equal('20 Jun 2014')
+	});
+	it('Returns empty string', function() {
+		c('{{long_date this}}', 'qazwsxedc').should.equal("")
+	});
+});
+
+describe('#json', function() {
+	it('Returns stringified JSON', function() {
+		c('{{json this}}',{'foo':'bar'}).should.equal('{\n  "foo": "bar"\n}')
+	});
+});
+