@atlassian/aui/src/js/aui/date-picker.js

import $ from './jquery';
import datepickerUI from 'jquery-ui/ui/widgets/datepicker';
import * as logger from './internal/log';
import { supportsDateField } from './internal/browser';
import globalize from './internal/globalize';
import keyCode from './key-code';
import { I18n } from './i18n';
import InlineDialogEl from './inline-dialog2';
import generateUniqueId from './unique-id';

const makePopup = ({horizontalAlignment, datePickerUUID}) => {
    const popupInlineDialogElement = new InlineDialogEl();
    popupInlineDialogElement.id = datePickerUUID;

    const popup = $(popupInlineDialogElement);
    popup.attr('persistent', '');
    popup.attr('data-aui-focus', 'false');
    popup.attr('alignment', `bottom ${horizontalAlignment}`);
    popup.addClass('aui-datepicker-dialog');

    return popup;
};

const makeConfig = ({ minDate, maxDate, dateFormat, $field, onSelect, hide, onChangeMonthYear}) => ({
    dateFormat,
    defaultDate: $field.val(),
    maxDate: maxDate || $field.attr('max'),
    minDate: minDate || $field.attr('min'),
    nextText: '>',
    onSelect: function (dateText) {
        $field.val(dateText);
        $field.trigger('change');
        hide();
        // TODO make sure the docs are explicit about the fact that onSelect cannot be an arrow function
        onSelect && onSelect.call(this, dateText);
    },
    onChangeMonthYear,
    prevText: '<'
});

const initCalendar = ({config, popupContents, getCalendarNode, hint}) => {
    const calendar = $(getCalendarNode());

    calendar.datepicker(config);

    let $hint;
    if (hint) {
        $hint = $('<div/>').addClass('aui-datepicker-hint');
        $hint.append('<span/>').text(hint);
        popupContents.append($hint);
    }

    return calendar;
};

const makeDefaultPopupController = ($field, datePickerUUID) => {
    let popup;
    let popupContents;
    let parentPopup;
    let isTrackingDatePickerFocus = false; // used to prevent multiple bindings of handleDatePickerFocus within handleFieldBlur


    const $body = $('body');

    const handleDatePickerFocus = (event) => {
        let $eventTarget = $(event.target);
        let isTargetInput = $eventTarget.closest(popupContents).length || $eventTarget.is($field);
        let isTargetPopup = $eventTarget.closest('.ui-datepicker-header').length;

        // Hide if we're clicking anywhere else but the input or popup OR if esc is pressed.
        if ((!isTargetInput && !isTargetPopup) || event.keyCode === keyCode.ESCAPE) {
            hideDatePicker();
            isTrackingDatePickerFocus = false;
            return;
        }

        if ($eventTarget.get(0) !== $field.get(0)) {
            event.preventDefault();
        }
    };

    const handleFieldBlur = () => {
        // Trigger blur if event is keydown and esc OR is focusout.
        if (!(isTrackingDatePickerFocus)) {
            $body.on('focus blur click mousedown', '*', handleDatePickerFocus);
            isTrackingDatePickerFocus = true;
        }
    };


    const createPolyfill = function () {
        // bind additional field processing events
        $body.on('keydown', handleDatePickerFocus);
        $field.on('focusout keydown', handleFieldBlur);


    };

    const getPopupContents = ({$field}) => {
        const calculateHorizontalAlignment = $field => {
            let inLeftHalf = $field.offset().left < window.innerWidth / 2;
            return inLeftHalf ? 'left' : 'right';
        };

        popup = makePopup({horizontalAlignment: calculateHorizontalAlignment($field), datePickerUUID});

        parentPopup = $field.closest('aui-inline-dialog').get(0);
        if (parentPopup) {
            parentPopup._datePickerPopup = popup; // AUI-2696 - hackish coupling to control inline-dialog close behaviour.
            $(parentPopup).on('aui-hide', e => {
                if (isTrackingDatePickerFocus) {
                    e.preventDefault();
                }
                $body.off('focus blur', '*', handleDatePickerFocus);
                if (parentPopup && parentPopup._datePickerPopup) {
                    delete parentPopup._datePickerPopup;
                }
            });
        }

        $body.append(popup);

        popupContents = popup;

        return popup;
    };

    const handleFieldFocus = () => {
        if (!popup.get(0).open) {
            showDatePicker()
        }
    };

    const showDatePicker = () => {
        popup.get(0).open = true;
    };

    const hideDatePicker = () => {
        popup.get(0).open = false;
    };

    const handleChangeMonthYear = () => {
        // defer refresh call until current stack has cleared (after month has rendered)
        setTimeout(popup.refresh, 0);
    };

    const getCalendarNode = () =>
        popup.get(0).childNodes[0];

    const destroyPolyfill = () => {
        // goodbye, cruel world!
        hideDatePicker();

        $field.off('focus click', handleFieldFocus);
        $field.off('focusout keydown', handleFieldBlur);

        $body.off('keydown', handleFieldBlur);
        $body.off('focus blur click mousedown keydown', handleDatePickerFocus);
    };

    return {
        calendarContainerSelector: null,
        getPopupContents,
        handleFieldFocus,
        showDatePicker,
        hideDatePicker,
        handleChangeMonthYear,
        getCalendarNode,
        destroyPolyfill,
        createPolyfill
    }
};

const initPolyfill = function (datePicker) {
    const $field = datePicker.getField();
    const options = datePicker.getOptions();
    const datePickerUUID = datePicker.getUUID();

    let calendar;

    const {
        getPopupContents,
        handleFieldFocus,
        showDatePicker,
        hideDatePicker,
        handleChangeMonthYear,
        getCalendarNode,
        destroyPolyfill,
        createPolyfill,
    } = makeDefaultPopupController($field, datePickerUUID);

    const handleFieldUpdate = (event) => {
        let val = $(event.currentTarget).val();
        // IE10/11 fire the 'input' event when internally showing and hiding
        // the placeholder of an input. This was cancelling the initial click
        // event and preventing the selection of the first date. The val check here
        // is a workaround to assure we have legitimate user input that should update
        // the calendar
        if (val) {
            calendar.datepicker('setDate', $field.val());
        }
    };

    // keep track of things we mutate within `initPolyfill`.
    // these should all be restored in the `destroyPolyfill` function.
    const originalPlaceholder = $field.attr('placeholder');
    const originalType = $field.prop('type');
    let attributeHandler;

    // -----------------------------------------------------------------
    // mutate datePicker public API
    // -----------------------------------------------------------------
    {
        const withCalendar = callback => value => {
            if (typeof calendar !== 'undefined') {
                return callback(value)
            }
        };

        const destroyCalendar = withCalendar(() => {
            calendar.datepicker('destroy');
        });

        datePicker.show = showDatePicker;

        datePicker.hide = hideDatePicker;

        // un-does everything the `initPolyfill` function constructed or mutated.
        datePicker.destroyPolyfill = () => {
            destroyPolyfill();

            $field.off('propertychange keyup input paste', handleFieldUpdate);

            if (attributeHandler) {
                attributeHandler.disconnect();
                attributeHandler = null;
            }

            if (originalPlaceholder) {
                $field.attr('placeholder', originalPlaceholder);
            }

            if (originalType) {
                $field.prop('type', originalType);
            }

            $field.removeAttr('data-aui-dp-uuid');

            destroyCalendar();

            // TODO: figure out a way to tear down the popup (if necessary)

            delete datePicker.destroyPolyfill;

            delete datePicker.show;
            delete datePicker.hide;

        };

        datePicker.setDate = withCalendar(value => {
            calendar.datepicker('setDate', value)
        });

        datePicker.getDate = withCalendar(() => calendar.datepicker('getDate'));

        datePicker.setMin = withCalendar(value => calendar.datepicker('option', 'minDate', value));

        datePicker.setMax = withCalendar(value => calendar.datepicker('option', 'maxDate', value));
    }


    // -----------------------------------------------------------------
    // polyfill bootstrap ----------------------------------------------
    // -----------------------------------------------------------------


    if (!(options.languageCode in DatePicker.prototype.localisations)) {
        options.languageCode = '';
    }
    const i18nConfig = DatePicker.prototype.localisations;

    $field.attr('aria-controls', datePickerUUID);

    if (typeof calendar === 'undefined') {
        if (typeof $field.attr('step') !== 'undefined') {
            logger.log('WARNING: The date picker polyfill currently does not support the step attribute!');
        }
        const baseConfig = makeConfig({
            dateFormat: options.dateFormat,
            minDate: options.minDate,
            maxDate: options.maxDate,
            $field,
            onSelect: options.onSelect,
            hide: datePicker.hide,
            onChangeMonthYear: handleChangeMonthYear
        });
        const config = $.extend(undefined, baseConfig, i18nConfig);

        // If this is a string value, it will be coerced to numeric.
        // Since nothing only numbers can be larger than a negative number, this works as a defense.
        if (options.firstDay > -1) {
            config.firstDay = options.firstDay;
        }

        calendar = initCalendar({
            config,
            popupContents: getPopupContents({$field}),
            getCalendarNode,
            hint: options.hint
        });

        createPolyfill();

        $field.on('propertychange keyup input paste', handleFieldUpdate);


        // bind attribute handlers to account for html5 attributes
        attributeHandler = new MutationObserver(function (mutationsList) {
            mutationsList.forEach(function (mutation) {
                if (mutation.attributeName === 'min') {
                    datePicker.setMin(mutation.target.getAttribute('min'));
                } else if (mutation.attributeName === 'max') {
                    datePicker.setMax(mutation.target.getAttribute('max'));
                }
            });
        });
        attributeHandler.observe($field.get(0), {attributes: true});
    }

    // bind what we need to start off with
    $field.on('focus click', handleFieldFocus); // the click is for fucking opera... Y U NO FIRE FOCUS EVENTS PROPERLY???

    // give users a hint that this is a date field; note that placeholder isn't technically a valid attribute
    // according to the spec...
    $field.attr('placeholder', options.placeholder);

    // Override the browser's default date field implementation.
    // There used to be a fix for AUI-3681 here, too, but my testing of Edge 15
    // shows that changing the `type` of input does not erase its value.
    // see https://codepen.io/chrisdarroch/pen/YzwgjyJ
    $field.prop('type', 'text');
    // Set default value on initialization to handle all date formats.
    // It is possible, because of changing type to text on the line above.
    $field.val($field.attr('value'));
    // Trigger change to update calendar popup value.
    $field.trigger('propertychange');

    // demonstrate the polyfill is initialised
    $field.attr('data-aui-dp-uuid', datePickerUUID);
};

function DatePicker(field, baseOptions) {
    let options = {};

    const datePickerUUID = generateUniqueId('date-picker');

    const $field = $(field);

    const datePicker = {
        getUUID: () => datePickerUUID,
        getField: () => $field,
        getOptions: () => options,
        destroy: () => {
            if (typeof datePicker.destroyPolyfill === 'function') {
                datePicker.destroyPolyfill();
            }
        },
        reset: () => {
            datePicker.destroy();
            const browserDoesNotSupportDateField = !DatePicker.prototype.browserSupportsDateField;
            const shouldOverrideBrowserDefault = options.overrideBrowserDefault !== false;

            if (
                browserDoesNotSupportDateField ||
                shouldOverrideBrowserDefault
            ) {
                initPolyfill(datePicker);
            }
        },
        reconfigure: newOptions => {
            options = $.extend(undefined, DatePicker.prototype.defaultOptions, newOptions);
            datePicker.reset();
        }
    };

    datePicker.reconfigure(baseOptions);

    return datePicker;
}

// -------------------------------------------------------------------------
// things that should be common --------------------------------------------
// -------------------------------------------------------------------------

DatePicker.prototype.browserSupportsDateField = supportsDateField();

DatePicker.prototype.defaultOptions = {
    overrideBrowserDefault: false,
    firstDay: -1,
    languageCode: $('html').attr('lang') || 'en-AU',
    dateFormat: datepickerUI.W3C // same as $.datepicker.ISO_8601
};

function CalendarWidget(calendarNode, baseOptions) {
    const options = $.extend({
        'nextText': '>',
        'prevText': '<'
    }, baseOptions);

    const $calendarNode = $(calendarNode);

    const $result = $calendarNode
        .addClass('aui-datepicker-dialog')
        .addClass('aui-calendar-widget')
        .datepicker(options);

    if (options.hint) {
        const $hint = $('<div/>').addClass('aui-datepicker-hint');
        $hint.append('<span/>').text(options.hint);
        $result.append($hint);
    }

    $result.reconfigure = (options) => {
        $result.datepicker('destroy');
        $result.datepicker(options);
    };

    $result.destroy = () => {
        $result.datepicker('destroy');
    };

    return $result
}

// adapted from the jQuery UI Datepicker widget (v1.8.16), with the following changes:
//   - dayNamesShort -> dayNamesMin
//   - unnecessary attributes omitted
/*
CODE to extract codes out:

var langCode, langs, out;
langs = jQuery.datepicker.regional;
out = {};

for (langCode in langs) {
    if (langs.hasOwnProperty(langCode)) {
        out[langCode] = {
            'dayNames': langs[langCode].dayNames,
            'dayNamesMin': langs[langCode].dayNamesShort, // this is deliberate
            'firstDay': langs[langCode].firstDay,
            'isRTL': langs[langCode].isRTL,
            'monthNames': langs[langCode].monthNames,
            'showMonthAfterYear': langs[langCode].showMonthAfterYear,
            'yearSuffix': langs[langCode].yearSuffix
        };
    }
}

 */

DatePicker.prototype.localisations = {
    'dayNames': [I18n.getText('ajs.datepicker.localisations.day-names.sunday'),
        I18n.getText('ajs.datepicker.localisations.day-names.monday'),
        I18n.getText('ajs.datepicker.localisations.day-names.tuesday'),
        I18n.getText('ajs.datepicker.localisations.day-names.wednesday'),
        I18n.getText('ajs.datepicker.localisations.day-names.thursday'),
        I18n.getText('ajs.datepicker.localisations.day-names.friday'),
        I18n.getText('ajs.datepicker.localisations.day-names.saturday')],
    'dayNamesMin': [I18n.getText('ajs.datepicker.localisations.day-names-min.sunday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.monday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.tuesday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.wednesday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.thursday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.friday'),
        I18n.getText('ajs.datepicker.localisations.day-names-min.saturday')],
    'firstDay': I18n.getText('ajs.datepicker.localisations.first-day'),
    'isRTL': I18n.getText('ajs.datepicker.localisations.is-RTL') === 'true',
    'monthNames': [I18n.getText('ajs.datepicker.localisations.month-names.january'),
        I18n.getText('ajs.datepicker.localisations.month-names.february'),
        I18n.getText('ajs.datepicker.localisations.month-names.march'),
        I18n.getText('ajs.datepicker.localisations.month-names.april'),
        I18n.getText('ajs.datepicker.localisations.month-names.may'),
        I18n.getText('ajs.datepicker.localisations.month-names.june'),
        I18n.getText('ajs.datepicker.localisations.month-names.july'),
        I18n.getText('ajs.datepicker.localisations.month-names.august'),
        I18n.getText('ajs.datepicker.localisations.month-names.september'),
        I18n.getText('ajs.datepicker.localisations.month-names.october'),
        I18n.getText('ajs.datepicker.localisations.month-names.november'),
        I18n.getText('ajs.datepicker.localisations.month-names.december')],
    'showMonthAfterYear': I18n.getText('ajs.datepicker.localisations.show-month-after-year') === 'true',
    'yearSuffix': I18n.getText('ajs.datepicker.localisations.year-suffix')
};


// -------------------------------------------------------------------------
// finally, integrate with jQuery for convenience --------------------------
// -------------------------------------------------------------------------
const key = 'aui-datepicker';

const makePlugin = (WidgetConstructor) => function (options) {
    let picker = this.data(key);
    if (!picker) {
        picker = new WidgetConstructor(this, options);
        this.data(key, picker);
    } else if (typeof options === 'object') {
        picker.reconfigure(options);
    } else if (options === 'destroy') {
        picker.destroy();
    }
    return picker;
};

$.fn.datePicker = makePlugin(DatePicker);
globalize('DatePicker', DatePicker);

$.fn.calendarWidget = makePlugin(CalendarWidget);
globalize('CalendarWidget', CalendarWidget);

export default DatePicker;
export { CalendarWidget }