From e88f0a18cf7ad7a029b8c8ba6affdae6f9e079a9 Mon Sep 17 00:00:00 2001
From: cash <cash.costello@gmail.com>
Date: Mon, 4 Jul 2011 12:01:31 -0400
Subject: Fixes #3560 input/date and output/date support ISO 8601 (YYYY-MM-DD)
 and Unix timestamps. Need to think about how to handle alternate text
 formats.

---
 js/lib/ui.js                  | 37 +++++++++++++++++++++++++++++++++----
 views/default/input/date.php  | 39 ++++++++++++++++++++++++++++++---------
 views/default/output/date.php | 12 +++++++-----
 3 files changed, 70 insertions(+), 18 deletions(-)

diff --git a/js/lib/ui.js b/js/lib/ui.js
index fd20acbd1..4426917ed 100644
--- a/js/lib/ui.js
+++ b/js/lib/ui.js
@@ -20,7 +20,7 @@ elgg.ui.init = function () {
 	$('.elgg-requires-confirmation').live('click', elgg.ui.requiresConfirmation);
 
 	if ($('.elgg-input-date').length) {
-		$('.elgg-input-date').datepicker();
+		elgg.ui.initDatePicker();
 	}
 }
 
@@ -53,7 +53,7 @@ elgg.ui.toggles = function(event) {
  *	targetSelector: The selector used to find the popup
  *	target:         The popup jQuery element as found by the selector
  *	source:         The jquery element whose click event initiated a popup.
- *	
+ *
  * The return value of the function is used as the options object to .position().
  * Handles can also return false to abort the default behvior and override it with their own.
  *
@@ -87,7 +87,7 @@ elgg.ui.popsUp = function(event) {
 	if (!options) {
 		return;
 	}
-	
+
 	// hide if already open
 	if ($target.is(':visible')) {
 		$target.fadeOut();
@@ -120,7 +120,7 @@ elgg.ui.popupClose = function(event) {
 		if (!$target.is(':visible')) {
 			return;
 		}
-		
+
 		// didn't click inside the target
 		if ($eventTarget.closest(target).length > 0) {
 			inTarget = true;
@@ -246,5 +246,34 @@ elgg.ui.LoginHandler = function(hook, type, params, options) {
 	return null;
 };
 
+/**
+ * Initialize the date picker
+ *
+ * Uses the class .elgg-input-date as the selector.
+ *
+ * If the class .elgg-input-timestamp is set on the input element, the onSelect
+ * method converts the date text to a unix timestamp in seconds. That value is
+ * stored in a hidden element indicated by the id on the input field.
+ *
+ * @return void
+ */
+elgg.ui.initDatePicker = function() {
+	$('.elgg-input-date').datepicker({
+		// ISO-8601
+		dateFormat: 'yy-mm-dd',
+		onSelect: function(dateText) {
+			if ($(this).is('.elgg-input-timestamp')) {
+				// convert to unix timestamp
+				var date = $.datepicker.parseDate('yy-mm-dd', dateText);
+				var timestamp = $.datepicker.formatDate('@', date);
+				timestamp = timestamp / 1000;
+
+				var id = $(this).attr('id');
+				$('input[name="' + id + '"]').val(timestamp);
+			}
+		}
+	});
+}
+
 elgg.register_hook_handler('init', 'system', elgg.ui.init);
 elgg.register_hook_handler('getOptions', 'ui.popup', elgg.ui.LoginHandler);
\ No newline at end of file
diff --git a/views/default/input/date.php b/views/default/input/date.php
index e21a5f8f5..ceeb2105c 100644
--- a/views/default/input/date.php
+++ b/views/default/input/date.php
@@ -3,11 +3,18 @@
  * Elgg date input
  * Displays a text field with a popup date picker.
  *
- * @package Elgg
- * @subpackage Core
+ * The elgg.ui JavaScript library initializes the jQueryUI datepicker based
+ * on the CSS class .elgg-input-date. It uses the ISO 8601 standard for date
+ * representation: yyyy-mm-dd.
  *
- * @uses $vars['value'] The current value, if any (as a unix timestamp)
- * @uses $vars['class'] Additional CSS class
+ * Unix timestamps are supported by setting the 'timestamp' parameter to true.
+ * The date is still displayed to the user in a text format but is submitted as
+ * a unix timestamp in seconds.
+ *
+ * @uses $vars['value']     The current value, if any (as a unix timestamp)
+ * @uses $vars['class']     Additional CSS class
+ * @uses $vars['timestamp'] Store as a Unix timestamp in seconds. Default = false
+ *                          Note: you cannot use an id with the timestamp option.
  */
 
 //@todo popup_calendar deprecated in 1.8.  Remove in 2.0
@@ -20,16 +27,30 @@ if (isset($vars['class'])) {
 $defaults = array(
 	'value' => '',
 	'disabled' => false,
+	'timestamp' => false,
 );
 
 $vars = array_merge($defaults, $vars);
 
+$timestamp = $vars['timestamp'];
+unset($vars['timestamp']);
+
+if ($timestamp) {
+	echo elgg_view('input/hidden', array(
+		'name' => $vars['name'],
+		'value' => $vars['value'],
+	));
 
-if ($vars['value'] > 86400) {
-	$vars['value'] = date('n/d/Y', $vars['value']);
+	$vars['class'] = "{$vars['class']} elgg-input-timestamp";
+	$vars['id'] = $vars['name'];
+	unset($vars['name']);
+	unset($vars['internalname']);
 }
 
-$attributes = elgg_format_attributes($vars);
+// convert timestamps to text for display
+if (is_numeric($vars['value'])) {
+	$vars['value'] = gmdate('Y/m/d', $vars['value']);
+}
 
-?>
-<input type="text" <?php echo $attributes; ?> />
\ No newline at end of file
+$attributes = elgg_format_attributes($vars);
+echo "<input type=\"text\" $attributes />";
diff --git a/views/default/output/date.php b/views/default/output/date.php
index fda7668e7..7c98dddc9 100644
--- a/views/default/output/date.php
+++ b/views/default/output/date.php
@@ -6,10 +6,12 @@
  * @package Elgg
  * @subpackage Core
  *
- * @uses $vars['value'] A UNIX epoch timestamp
- *
+ * @uses $vars['value'] Date as text or a Unix timestamp in seconds
  */
 
-if ($vars['value'] > 86400) {
-	echo date("n/d/Y", $vars['value']);
-}
\ No newline at end of file
+// convert timestamps to text for display
+if (is_numeric($vars['value'])) {
+	$vars['value'] = gmdate('Y/m/d', $vars['value']);
+}
+
+echo $vars['value'];
-- 
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