Added support for date filter

Date filter now supports:
yyyy: four digit year
  yy: two digit year
  MM: two digit month
  dd: two digit day of month
  HH: two digit hour in 0-23
  KK: two digit hour in 0-12
  mm: two digit minute
  ss: two digit second
   a: am/pm
   Z: four digit timezone offset

example {{ timestamp | date:'yyyy-MM-dd HH:mm:ss' }} becomes 2010-10-13 14:45:23

3 files changed, 154 insertions, 75 deletions

diff --git a/src/filters.js b/src/filters.js
index f1fc89f1..e2e0e92c 100644
--- a/src/filters.js
+++ b/src/filters.js
@@ -30,12 +30,55 @@ angularFilter.number = function(amount, fractionSize){
   }
   return text;
 };
+function padNumber(num, digits, trim) {
+  var neg = '';
+  if (num < 0) {
+    neg =  '-';
+    num = -num;
+  }
+  num = '' + num;
+  while(num.length < digits) num = '0' + num;
+  if (trim)
+    num = num.substr(num.length - digits);
+  return neg + num;
+}
+function dateGetter(name, size, option) {
+  return function(date) {
+    var value = date[name].call(date) + 1*(option===1);
+    if (option == -12 && value > 12) value += option;
+    return padNumber(value, size, option === true);
+  };
+}
+var DATE_FORMATS = {
+  yyyy: dateGetter('getFullYear', 4),
+  yy:   dateGetter('getFullYear', 2, true),
+  MM:   dateGetter('getMonth', 2, 1),
+  dd:   dateGetter('getDate', 2),
+  HH:   dateGetter('getHours', 2),
+  KK:   dateGetter('getHours', 2, -12),
+  mm:   dateGetter('getMinutes', 2),
+  ss:   dateGetter('getSeconds', 2),
+  a:    function(date){return date.getHours() < 12 ? 'am' : 'pm'; },
+  Z:    function(date){
+          var offset = date.getTimezoneOffset();
+          return padNumber(offset / 60, 2) + padNumber(Math.abs(offset % 60), 2);
+        }
+};
+var DATE_FORMATS_SPLIT = new RegExp('('+
+    map(DATE_FORMATS, function(value, key){return key;}).join('|')+')');
+console.log(DATE_FORMATS_SPLIT);
 
-angularFilter.date = function(date) {
-  if (date instanceof Date)
-    return date.toLocaleDateString();
-  else
-    return date;
+angularFilter.date = function(date, format) {
+  if (!date instanceof Date) return date;
+  var text = date.toLocaleDateString(), fn;
+  if (format && isString(format)) {
+    text = '';
+    foreach(format.split(DATE_FORMATS_SPLIT), function(value){
+      fn = DATE_FORMATS[value];
+      text += fn ? fn(date) : value;
+    });
+  }
+  return text;
 };
 
 angularFilter.json = function(object) {
diff --git a/test/FiltersSpec.js b/test/FiltersSpec.js
new file mode 100644
index 00000000..1767bede
--- /dev/null
+++ b/test/FiltersSpec.js
@@ -0,0 +1,106 @@
+describe('filter', function(){
+
+  var filter = angular.filter;
+
+  describe('Currency', function(){
+    it('should do basic filter', function(){
+      var html = jqLite('<span/>');
+      var context = {$element:html};
+      var currency = bind(context, filter.currency);
+
+      assertEquals(currency(0), '$0.00');
+      assertEquals(html.hasClass('ng:format-negative'), false);
+      assertEquals(currency(-999), '$-999.00');
+      assertEquals(html.hasClass('ng:format-negative'), true);
+      assertEquals(currency(1234.5678), '$1,234.57');
+      assertEquals(html.hasClass('ng:format-negative'), false);
+    });
+  });
+
+  describe('FilterThisIsContext', function(){
+    it('should do basic filter', function(){
+      expectAsserts(1);
+      var scope = createScope();
+      scope.name = 'misko';
+      filter.testFn = function () {
+        assertEquals('scope not equal', 'misko', this.name);
+      };
+      scope.$eval("0|testFn");
+      delete angular.filter['testFn'];
+    });
+  });
+
+  describe('NumberFormat', function(){
+    it('should do basic filter', function(){
+      var context = {jqElement:jqLite('<span/>')};
+      var number = bind(context, filter.number);
+
+      assertEquals('0', number(0, 0));
+      assertEquals('0.00', number(0));
+      assertEquals('-999.00', number(-999));
+      assertEquals('1,234.57', number(1234.5678));
+      assertEquals('', number(Number.NaN));
+      assertEquals('1,234.57', number("1234.5678"));
+      assertEquals("", number(1/0));
+    });
+  });
+
+  describe('Json', function () {
+    it('should do basic filter', function(){
+      assertEquals(toJson({a:"b"}, true), filter.json.call({$element:jqLite('<div></div>')}, {a:"b"}));
+    });
+  });
+
+  describe('Lowercase', function() {
+    it('should do basic filter', function(){
+      assertEquals('abc', filter.lowercase('AbC'));
+      assertEquals(null, filter.lowercase(null));
+    });
+  });
+
+  describe('Uppercase', function() {
+    it('should do basic filter', function(){
+      assertEquals('ABC', filter.uppercase('AbC'));
+      assertEquals(null, filter.uppercase(null));
+    });
+  });
+
+  describe('Html', function() {
+    it('should do basic filter', function(){
+      var html = filter.html("a<b>c</b>d");
+      expect(html instanceof HTML).toBeTruthy();
+      expect(html.html).toEqual("a<b>c</b>d");
+    });
+  });
+
+  describe('Linky', function() {
+    it('should do basic filter', function(){
+      var linky = filter.linky;
+      assertEquals(
+          '<a href="http://ab/">http://ab/</a> ' +
+          '(<a href="http://a/">http://a/</a>) ' +
+          '&lt;<a href="http://a/">http://a/</a>&gt; ' +
+          '<a href="http://1.2/v:~-123">http://1.2/v:~-123</a>. c',
+          linky("http://ab/ (http://a/) <http://a/> http://1.2/v:~-123. c").html);
+      assertEquals(undefined, linky(undefined));
+    });
+  });
+
+  describe('date', function(){
+    var date = angular.String.toDate('2010-10-13T14:45:23Z');
+    date.setHours(14);
+
+    it('should do basic filter', function() {
+      expect(filter.date(date)).toEqual(date.toLocaleDateString());
+      expect(filter.date(date, '')).toEqual(date.toLocaleDateString());
+    });
+
+    it('should accept format', function() {
+      expect(filter.date(date, "yyyy-MM-dd HH:mm:ss")).toEqual('2010-10-13 14:45:23');
+      expect(filter.date(date, "yy-MM-dd KK:mm:ssaZ")).toEqual('10-10-13 02:45:23pm0700');
+    });
+
+
+  });
+});
+
diff --git a/test/FiltersTest.js b/test/FiltersTest.js
deleted file mode 100644
index d5484fd0..00000000
--- a/test/FiltersTest.js
+++ /dev/null
@@ -1,70 +0,0 @@
-FiltersTest = TestCase('FiltersTest');
-
-FiltersTest.prototype.testCurrency = function(){
-  var html = jqLite('<span/>');
-  var context = {$element:html};
-  var currency = bind(context, angular.filter.currency);
-
-  assertEquals(currency(0), '$0.00');
-  assertEquals(html.hasClass('ng:format-negative'), false);
-  assertEquals(currency(-999), '$-999.00');
-  assertEquals(html.hasClass('ng:format-negative'), true);
-  assertEquals(currency(1234.5678), '$1,234.57');
-  assertEquals(html.hasClass('ng:format-negative'), false);
-};
-
-FiltersTest.prototype.testFilterThisIsContext = function(){
-  expectAsserts(1);
-  var scope = createScope();
-  scope.name = 'misko';
-  angular.filter.testFn = function () {
-    assertEquals('scope not equal', 'misko', this.name);
-  };
-  scope.$eval("0|testFn");
-  delete angular.filter['testFn'];
-};
-
-FiltersTest.prototype.testNumberFormat = function(){
-  var context = {jqElement:jqLite('<span/>')};
-  var number = bind(context, angular.filter.number);
-
-  assertEquals('0', number(0, 0));
-  assertEquals('0.00', number(0));
-  assertEquals('-999.00', number(-999));
-  assertEquals('1,234.57', number(1234.5678));
-  assertEquals('', number(Number.NaN));
-  assertEquals('1,234.57', number("1234.5678"));
-  assertEquals("", number(1/0));
-};
-
-FiltersTest.prototype.testJson = function () {
-  assertEquals(toJson({a:"b"}, true), angular.filter.json.call({$element:jqLite('<div></div>')}, {a:"b"}));
-};
-
-FiltersTest.prototype.testLowercase = function() {
-  assertEquals('abc', angular.filter.lowercase('AbC'));
-  assertEquals(null, angular.filter.lowercase(null));
-};
-
-FiltersTest.prototype.testUppercase = function() {
-  assertEquals('ABC', angular.filter.uppercase('AbC'));
-  assertEquals(null, angular.filter.uppercase(null));
-};
-
-FiltersTest.prototype.testHtml = function() {
-  var html = angular.filter.html("a<b>c</b>d");
-  expect(html instanceof HTML).toBeTruthy();
-  expect(html.html).toEqual("a<b>c</b>d");
-};
-
-FiltersTest.prototype.testLinky = function() {
-  var linky = angular.filter.linky;
-  assertEquals(
-      '<a href="http://ab/">http://ab/</a> ' +
-      '(<a href="http://a/">http://a/</a>) ' +
-      '&lt;<a href="http://a/">http://a/</a>&gt; ' +
-      '<a href="http://1.2/v:~-123">http://1.2/v:~-123</a>. c',
-      linky("http://ab/ (http://a/) <http://a/> http://1.2/v:~-123. c").html);
-  assertEquals(undefined, linky(undefined));
-};
-