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100 lines
2.7 KiB
TypeScript
100 lines
2.7 KiB
TypeScript
// Loaded from https://deno.land/std@0.78.0/encoding/_yaml/type/timestamp.ts
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// Ported from js-yaml v3.13.1:
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// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
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// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { Type } from "../type.ts";
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const YAML_DATE_REGEXP = new RegExp(
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"^([0-9][0-9][0-9][0-9])" + // [1] year
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"-([0-9][0-9])" + // [2] month
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"-([0-9][0-9])$", // [3] day
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);
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const YAML_TIMESTAMP_REGEXP = new RegExp(
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"^([0-9][0-9][0-9][0-9])" + // [1] year
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"-([0-9][0-9]?)" + // [2] month
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"-([0-9][0-9]?)" + // [3] day
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"(?:[Tt]|[ \\t]+)" + // ...
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"([0-9][0-9]?)" + // [4] hour
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":([0-9][0-9])" + // [5] minute
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":([0-9][0-9])" + // [6] second
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"(?:\\.([0-9]*))?" + // [7] fraction
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"(?:[ \\t]*(Z|([-+])([0-9][0-9]?)" + // [8] tz [9] tz_sign [10] tz_hour
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"(?::([0-9][0-9]))?))?$", // [11] tz_minute
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);
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function resolveYamlTimestamp(data: string): boolean {
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if (data === null) return false;
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if (YAML_DATE_REGEXP.exec(data) !== null) return true;
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if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
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return false;
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}
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function constructYamlTimestamp(data: string): Date {
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let match = YAML_DATE_REGEXP.exec(data);
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if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);
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if (match === null) throw new Error("Date resolve error");
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// match: [1] year [2] month [3] day
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const year = +match[1];
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const month = +match[2] - 1; // JS month starts with 0
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const day = +match[3];
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if (!match[4]) {
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// no hour
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return new Date(Date.UTC(year, month, day));
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}
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// match: [4] hour [5] minute [6] second [7] fraction
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const hour = +match[4];
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const minute = +match[5];
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const second = +match[6];
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let fraction = 0;
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if (match[7]) {
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let partFraction = match[7].slice(0, 3);
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while (partFraction.length < 3) {
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// milli-seconds
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partFraction += "0";
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}
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fraction = +partFraction;
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}
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// match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute
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let delta = null;
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if (match[9]) {
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const tzHour = +match[10];
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const tzMinute = +(match[11] || 0);
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delta = (tzHour * 60 + tzMinute) * 60000; // delta in milli-seconds
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if (match[9] === "-") delta = -delta;
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}
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const date = new Date(
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Date.UTC(year, month, day, hour, minute, second, fraction),
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);
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if (delta) date.setTime(date.getTime() - delta);
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return date;
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}
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function representYamlTimestamp(date: Date): string {
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return date.toISOString();
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}
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export const timestamp = new Type("tag:yaml.org,2002:timestamp", {
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construct: constructYamlTimestamp,
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instanceOf: Date,
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kind: "scalar",
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represent: representYamlTimestamp,
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resolve: resolveYamlTimestamp,
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});
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