Function updateOptions

OpenReservation/wwwroot/Scripts/angular.js:28267–28348

()

                }

                function updateOptions() {
                    var previousValue = options && selectCtrl.readValue();

                    options = ngOptions.getOptions();

                    var groupMap = {};
                    var currentElement = selectElement[0].firstChild;

                    // Ensure that the empty option is always there if it was explicitly provided
                    if (providedEmptyOption) {
                        selectElement.prepend(emptyOption);
                    }

                    currentElement = skipEmptyAndUnknownOptions(currentElement);

                    options.items.forEach(function updateOption(option) {
                        var group;
                        var groupElement;
                        var optionElement;

                        if (isDefined(option.group)) {
                            // This option is to live in a group
                            // See if we have already created this group
                            group = groupMap[option.group];

                            if (!group) {
                                // We have not already created this group
                                groupElement = addOrReuseElement(selectElement[0],
                                    currentElement,
                                    'optgroup',
                                    optGroupTemplate);
                                // Move to the next element
                                currentElement = groupElement.nextSibling;

                                // Update the label on the group element
                                groupElement.label = option.group;

                                // Store it for use later
                                group = groupMap[option.group] = {
                                    groupElement: groupElement,
                                    currentOptionElement: groupElement.firstChild
                                };
                            }

                            // So now we have a group for this option we add the option to the group
                            optionElement = addOrReuseElement(group.groupElement,
                                group.currentOptionElement,
                                'option',
                                optionTemplate);
                            updateOptionElement(option, optionElement);
                            // Move to the next element
                            group.currentOptionElement = optionElement.nextSibling;
                        } else {
                            // This option is not in a group
                            optionElement = addOrReuseElement(selectElement[0],
                                currentElement,
                                'option',
                                optionTemplate);