Adding a "date" field, widget, and validator. Fixes #53.

README.md

@@ -111,13 +111,15 @@ components following the same API.
 * password
 * email
 * url
+* date
 
 ### Widgets
 
 * text
 * password
 * hidden
 * color
+* date
 * checkbox
 * select
 * textarea
@@ -139,6 +141,7 @@ components following the same API.
 * color
 * email
 * url
+* date
 
 ### Renderers
 

lib/fields.js

@@ -148,3 +148,14 @@ exports.array = function (opt) {
     return f;
 };
 
+exports.date = function (opt) {
+    if (!opt) { opt = {}; }
+    var f = exports.string(opt);
+    if (f.validators) {
+        f.validators.unshift(forms.validators.date());
+    } else {
+        f.validators = [forms.validators.date()];
+    }
+    return f;
+};
+

lib/validators.js

@@ -108,3 +108,18 @@ exports.url = function (include_localhost) {
     return exports.regexp(include_localhost ? with_localhost_regex : external_regex, 'Please enter a valid URL.');
 };
 
+exports.date = function () {
+    var numberRegex = /^[0-9]+$/,
+        invalidDate = new Date('z');
+    return function (form, field, callback) {
+        var parts = field.data ? field.data.split('-') : [],
+            allNumbers = parts.every(function (part) { return numberRegex.test(part); }),
+            date = allNumbers && parts.length === 3 ? new Date(parts[0], parts[1] - 1, parts[2]) : invalidDate;
+        if (!isNaN(date.getTime())) {
+            callback();
+        } else {
+            callback('Inputs of type "date" must be valid dates in the format "yyyy-mm-dd"');
+        }
+    };
+};
+

lib/widgets.js

@@ -88,6 +88,7 @@ exports.text = input('text');
 exports.password = input('password');
 exports.hidden = input('hidden');
 exports.color = input('color');
+exports.date = input('date');
 
 exports.checkbox = function (opt) {
     if (!opt) { opt = {}; }

test/test-fields.js

@@ -335,6 +335,40 @@ exports['url validators'] = function (test) {
     test.done();
 };
 
+testField('date');
+
+exports['date parse'] = function (test) {
+    test.equals(
+        fields.date().parse.toString(),
+        fields.string().parse.toString()
+    );
+    test.done();
+};
+
+exports['date toHTML'] = function (test) {
+    test.equals(
+        fields.date().toHTML.toString(),
+        fields.string().toHTML.toString()
+    );
+    test.done();
+};
+
+exports['date validators'] = function (test) {
+    test.equals(
+        fields.date().validators[0].toString(),
+        forms.validators.date().toString()
+    );
+    var fn1 = function () { return 'one'; },
+        fn2 = function () { return 'two'; },
+        f = fields.date({validators: [fn1, fn2]});
+    test.equals(
+        f.validators[0].toString(),
+        forms.validators.date().toString()
+    );
+    test.same(f.validators.slice(1), [fn1, fn2]);
+    test.done();
+};
+
 testField('array');
 
 exports['array parse'] = function (test) {

test/test-validators.js

@@ -101,6 +101,30 @@ exports.url = function (test) {
     ], test.done);
 };
 
+exports.date = function (test) {
+    var msg = 'Inputs of type "date" must be valid dates in the format "yyyy-mm-dd"';
+    async.parallel([
+        function (callback) {
+            validators.date()('form', {data: '02/28/2012'}, function (err) {
+                test.equals(err, msg);
+                validators.date()('form', {data: '2012-02-28'}, function (err) {
+                    test.equals(err, undefined);
+                    callback();
+                });
+            });
+        },
+        function (callback) {
+            validators.date(true)('form', {data: '2012.02.30'}, function (err) {
+                test.equals(err, msg);
+                validators.date(true)('form', {data: '2012-02-30'}, function (err) {
+                    test.equals(err, undefined);
+                    callback();
+                });
+            });
+        }
+    ], test.done);
+};
+
 exports.minlength = function (test) {
     validators.minlength(5)('form', {data: '1234'}, function (err) {
         test.equals(err, 'Please enter at least 5 characters.');

test/test-widgets.js

@@ -26,6 +26,7 @@ exports.text = test_input('text');
 exports.password = test_input('password');
 exports.hidden = test_input('hidden');
 exports.color = test_input('color');
+exports.date = test_input('date');
 
 exports.checkbox = function (test) {
     test.equals(