/*global angular */
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/*
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jQuery UI Datepicker plugin wrapper
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@note If ≤ IE8 make sure you have a polyfill for Date.toISOString()
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@param [ui-date] {object} Options to pass to $.fn.datepicker() merged onto uiDateConfig
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*/
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angular.module('ui.date', [])
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.constant('uiDateConfig', {})
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.directive('uiDate', ['uiDateConfig', 'uiDateConverter', function (uiDateConfig, uiDateConverter) {
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'use strict';
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var options;
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options = {};
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angular.extend(options, uiDateConfig);
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return {
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require:'?ngModel',
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link:function (scope, element, attrs, controller) {
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var getOptions = function () {
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return angular.extend({}, uiDateConfig, scope.$eval(attrs.uiDate));
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};
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var initDateWidget = function () {
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var showing = false;
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var opts = getOptions();
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// If we have a controller (i.e. ngModelController) then wire it up
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if (controller) {
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// Set the view value in a $apply block when users selects
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// (calling directive user's function too if provided)
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var _onSelect = opts.onSelect || angular.noop;
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opts.onSelect = function (value, picker) {
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scope.$apply(function() {
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showing = true;
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controller.$setViewValue(element.datepicker('getDate'));
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_onSelect(value, picker);
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element.blur();
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});
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};
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var _beforeShow = opts.beforeShow || angular.noop;
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opts.beforeShow = function(input, picker) {
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showing = true;
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_beforeShow(input, picker);
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};
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var _onClose = opts.onClose || angular.noop;
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opts.onClose = function(value, picker) {
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showing = false;
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_onClose(value, picker);
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};
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element.off('blur.datepicker').on('blur.datepicker', function() {
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if ( !showing ) {
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scope.$apply(function() {
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element.datepicker('setDate', element.datepicker('getDate'));
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controller.$setViewValue(element.datepicker('getDate'));
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});
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}
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});
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// Update the date picker when the model changes
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controller.$render = function () {
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var date = controller.$modelValue;
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if ( angular.isDefined(date) && date !== null && !angular.isDate(date) ) {
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if ( angular.isString(controller.$modelValue) ) {
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date = uiDateConverter.stringToDate(attrs.uiDateFormat, controller.$modelValue);
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} else {
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throw new Error('ng-Model value must be a Date, or a String object with a date formatter - currently it is a ' + typeof date + ' - use ui-date-format to convert it from a string');
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}
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}
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element.datepicker('setDate', date);
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};
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}
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// Check if the element already has a datepicker.
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if (element.data('datepicker')) {
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// Updates the datepicker options
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element.datepicker('option', opts);
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element.datepicker('refresh');
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} else {
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// Creates the new datepicker widget
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element.datepicker(opts);
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//Cleanup on destroy, prevent memory leaking
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element.on('$destroy', function () {
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element.datepicker('destroy');
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});
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}
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if ( controller ) {
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// Force a render to override whatever is in the input text box
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controller.$render();
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}
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};
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// Watch for changes to the directives options
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scope.$watch(getOptions, initDateWidget, true);
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}
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};
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}
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])
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.factory('uiDateConverter', ['uiDateFormatConfig', function(uiDateFormatConfig){
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function dateToString(dateFormat, value){
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dateFormat = dateFormat || uiDateFormatConfig;
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if (value) {
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if (dateFormat) {
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return jQuery.datepicker.formatDate(dateFormat, value);
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}
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if (value.toISOString) {
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return value.toISOString();
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}
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}
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return null;
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}
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function stringToDate(dateFormat, value) {
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dateFormat = dateFormat || uiDateFormatConfig;
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if ( angular.isString(value) ) {
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if (dateFormat) {
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return jQuery.datepicker.parseDate(dateFormat, value);
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}
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var isoDate = new Date(value);
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return isNaN(isoDate.getTime()) ? null : isoDate;
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}
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return null;
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}
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return {
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stringToDate: stringToDate,
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dateToString: dateToString
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};
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}])
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.constant('uiDateFormatConfig', '')
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.directive('uiDateFormat', ['uiDateConverter', function(uiDateConverter) {
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var directive = {
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require:'ngModel',
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link: function(scope, element, attrs, modelCtrl) {
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var dateFormat = attrs.uiDateFormat;
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// Use the datepicker with the attribute value as the dateFormat string to convert to and from a string
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modelCtrl.$formatters.unshift(function(value) {
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return uiDateConverter.stringToDate(dateFormat, value);
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});
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modelCtrl.$parsers.push(function(value){
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return uiDateConverter.dateToString(dateFormat, value);
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});
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}
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};
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return directive;
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}]);
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