128 lines
4.8 KiB
JavaScript
128 lines
4.8 KiB
JavaScript
/*!
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* Copyright (c) Squirrel Chat et al., All rights reserved.
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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let DATE_TIME_RE = /^(\d{4}-\d{2}-\d{2})?[T ]?(?:(\d{2}):\d{2}:\d{2}(?:\.\d+)?)?(Z|[-+]\d{2}:\d{2})?$/i;
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export class TomlDate extends Date {
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#hasDate = false;
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#hasTime = false;
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#offset = null;
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constructor(date) {
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let hasDate = true;
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let hasTime = true;
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let offset = 'Z';
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if (typeof date === 'string') {
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let match = date.match(DATE_TIME_RE);
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if (match) {
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if (!match[1]) {
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hasDate = false;
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date = `0000-01-01T${date}`;
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}
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hasTime = !!match[2];
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// Make sure to use T instead of a space. Breaks in case of extreme values otherwise.
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hasTime && date[10] === ' ' && (date = date.replace(' ', 'T'));
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// Do not allow rollover hours.
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if (match[2] && +match[2] > 23) {
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date = '';
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}
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else {
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offset = match[3] || null;
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date = date.toUpperCase();
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if (!offset && hasTime)
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date += 'Z';
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}
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}
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else {
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date = '';
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}
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}
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super(date);
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if (!isNaN(this.getTime())) {
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this.#hasDate = hasDate;
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this.#hasTime = hasTime;
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this.#offset = offset;
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}
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}
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isDateTime() {
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return this.#hasDate && this.#hasTime;
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}
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isLocal() {
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return !this.#hasDate || !this.#hasTime || !this.#offset;
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}
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isDate() {
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return this.#hasDate && !this.#hasTime;
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}
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isTime() {
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return this.#hasTime && !this.#hasDate;
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}
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isValid() {
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return this.#hasDate || this.#hasTime;
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}
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toISOString() {
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let iso = super.toISOString();
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// Local Date
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if (this.isDate())
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return iso.slice(0, 10);
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// Local Time
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if (this.isTime())
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return iso.slice(11, 23);
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// Local DateTime
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if (this.#offset === null)
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return iso.slice(0, -1);
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// Offset DateTime
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if (this.#offset === 'Z')
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return iso;
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// This part is quite annoying: JS strips the original timezone from the ISO string representation
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// Instead of using a "modified" date and "Z", we restore the representation "as authored"
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let offset = (+(this.#offset.slice(1, 3)) * 60) + +(this.#offset.slice(4, 6));
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offset = this.#offset[0] === '-' ? offset : -offset;
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let offsetDate = new Date(this.getTime() - (offset * 60e3));
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return offsetDate.toISOString().slice(0, -1) + this.#offset;
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}
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static wrapAsOffsetDateTime(jsDate, offset = 'Z') {
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let date = new TomlDate(jsDate);
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date.#offset = offset;
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return date;
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}
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static wrapAsLocalDateTime(jsDate) {
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let date = new TomlDate(jsDate);
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date.#offset = null;
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return date;
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}
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static wrapAsLocalDate(jsDate) {
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let date = new TomlDate(jsDate);
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date.#hasTime = false;
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date.#offset = null;
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return date;
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}
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static wrapAsLocalTime(jsDate) {
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let date = new TomlDate(jsDate);
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date.#hasDate = false;
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date.#offset = null;
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return date;
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}
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}
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