source: trip-planner-front/node_modules/date-format/lib/index.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 6.2 KB
Line 
1"use strict";
2
3function padWithZeros(vNumber, width) {
4 var numAsString = vNumber.toString();
5 while (numAsString.length < width) {
6 numAsString = "0" + numAsString;
7 }
8 return numAsString;
9}
10
11function addZero(vNumber) {
12 return padWithZeros(vNumber, 2);
13}
14
15/**
16 * Formats the TimeOffset
17 * Thanks to http://www.svendtofte.com/code/date_format/
18 * @private
19 */
20function offset(timezoneOffset) {
21 var os = Math.abs(timezoneOffset);
22 var h = String(Math.floor(os / 60));
23 var m = String(os % 60);
24 if (h.length === 1) {
25 h = "0" + h;
26 }
27 if (m.length === 1) {
28 m = "0" + m;
29 }
30 return timezoneOffset < 0 ? "+" + h + m : "-" + h + m;
31}
32
33function asString(format, date) {
34 if (typeof format !== "string") {
35 date = format;
36 format = module.exports.ISO8601_FORMAT;
37 }
38 if (!date) {
39 date = module.exports.now();
40 }
41
42 // Issue # 14 - Per ISO8601 standard, the time string should be local time
43 // with timezone info.
44 // See https://en.wikipedia.org/wiki/ISO_8601 section "Time offsets from UTC"
45
46 var vDay = addZero(date.getDate());
47 var vMonth = addZero(date.getMonth() + 1);
48 var vYearLong = addZero(date.getFullYear());
49 var vYearShort = addZero(vYearLong.substring(2, 4));
50 var vYear = format.indexOf("yyyy") > -1 ? vYearLong : vYearShort;
51 var vHour = addZero(date.getHours());
52 var vMinute = addZero(date.getMinutes());
53 var vSecond = addZero(date.getSeconds());
54 var vMillisecond = padWithZeros(date.getMilliseconds(), 3);
55 var vTimeZone = offset(date.getTimezoneOffset());
56 var formatted = format
57 .replace(/dd/g, vDay)
58 .replace(/MM/g, vMonth)
59 .replace(/y{1,4}/g, vYear)
60 .replace(/hh/g, vHour)
61 .replace(/mm/g, vMinute)
62 .replace(/ss/g, vSecond)
63 .replace(/SSS/g, vMillisecond)
64 .replace(/O/g, vTimeZone);
65 return formatted;
66}
67
68function setDatePart(date, part, value, local) {
69 date['set' + (local ? '' : 'UTC') + part](value);
70}
71
72function extractDateParts(pattern, str, missingValuesDate) {
73 // Javascript Date object doesn't support custom timezone. Sets all felds as
74 // GMT based to begin with. If the timezone offset is provided, then adjust
75 // it using provided timezone, otherwise, adjust it with the system timezone.
76 var local = pattern.indexOf('O') < 0;
77 var matchers = [
78 {
79 pattern: /y{1,4}/,
80 regexp: "\\d{1,4}",
81 fn: function(date, value) {
82 setDatePart(date, 'FullYear', value, local);
83 }
84 },
85 {
86 pattern: /MM/,
87 regexp: "\\d{1,2}",
88 fn: function(date, value) {
89 setDatePart(date, 'Month', (value - 1), local);
90 }
91 },
92 {
93 pattern: /dd/,
94 regexp: "\\d{1,2}",
95 fn: function(date, value) {
96 setDatePart(date, 'Date', value, local);
97 }
98 },
99 {
100 pattern: /hh/,
101 regexp: "\\d{1,2}",
102 fn: function(date, value) {
103 setDatePart(date, 'Hours', value, local);
104 }
105 },
106 {
107 pattern: /mm/,
108 regexp: "\\d\\d",
109 fn: function(date, value) {
110 setDatePart(date, 'Minutes', value, local);
111 }
112 },
113 {
114 pattern: /ss/,
115 regexp: "\\d\\d",
116 fn: function(date, value) {
117 setDatePart(date, 'Seconds', value, local);
118 }
119 },
120 {
121 pattern: /SSS/,
122 regexp: "\\d\\d\\d",
123 fn: function(date, value) {
124 setDatePart(date, 'Milliseconds', value, local);
125 }
126 },
127 {
128 pattern: /O/,
129 regexp: "[+-]\\d{3,4}|Z",
130 fn: function(date, value) {
131 if (value === "Z") {
132 value = 0;
133 }
134 var offset = Math.abs(value);
135 var timezoneOffset = (value > 0 ? -1 : 1 ) * ((offset % 100) + Math.floor(offset / 100) * 60);
136 // Per ISO8601 standard: UTC = local time - offset
137 //
138 // For example, 2000-01-01T01:00:00-0700
139 // local time: 2000-01-01T01:00:00
140 // ==> UTC : 2000-01-01T08:00:00 ( 01 - (-7) = 8 )
141 //
142 // To make it even more confusing, the date.getTimezoneOffset() is
143 // opposite sign of offset string in the ISO8601 standard. So if offset
144 // is '-0700' the getTimezoneOffset() would be (+)420. The line above
145 // calculates timezoneOffset to matche Javascript's behavior.
146 //
147 // The date/time of the input is actually the local time, so the date
148 // object that was constructed is actually local time even thought the
149 // UTC setters are used. This means the date object's internal UTC
150 // representation was wrong. It needs to be fixed by substracting the
151 // offset (or adding the offset minutes as they are opposite sign).
152 //
153 // Note: the time zone has to be processed after all other fileds are
154 // set. The result would be incorrect if the offset was calculated
155 // first then overriden by the other filed setters.
156 date.setUTCMinutes(date.getUTCMinutes() + timezoneOffset);
157 }
158 }
159 ];
160
161 var parsedPattern = matchers.reduce(
162 function(p, m) {
163 if (m.pattern.test(p.regexp)) {
164 m.index = p.regexp.match(m.pattern).index;
165 p.regexp = p.regexp.replace(m.pattern, "(" + m.regexp + ")");
166 } else {
167 m.index = -1;
168 }
169 return p;
170 },
171 { regexp: pattern, index: [] }
172 );
173
174 var dateFns = matchers.filter(function(m) {
175 return m.index > -1;
176 });
177 dateFns.sort(function(a, b) {
178 return a.index - b.index;
179 });
180
181 var matcher = new RegExp(parsedPattern.regexp);
182 var matches = matcher.exec(str);
183 if (matches) {
184 var date = missingValuesDate || module.exports.now();
185 dateFns.forEach(function(f, i) {
186 f.fn(date, matches[i + 1]);
187 });
188
189 return date;
190 }
191
192 throw new Error(
193 "String '" + str + "' could not be parsed as '" + pattern + "'"
194 );
195}
196
197function parse(pattern, str, missingValuesDate) {
198 if (!pattern) {
199 throw new Error("pattern must be supplied");
200 }
201
202 return extractDateParts(pattern, str, missingValuesDate);
203}
204
205/**
206 * Used for testing - replace this function with a fixed date.
207 */
208function now() {
209 return new Date();
210}
211
212module.exports = asString;
213module.exports.asString = asString;
214module.exports.parse = parse;
215module.exports.now = now;
216module.exports.ISO8601_FORMAT = "yyyy-MM-ddThh:mm:ss.SSS";
217module.exports.ISO8601_WITH_TZ_OFFSET_FORMAT = "yyyy-MM-ddThh:mm:ss.SSSO";
218module.exports.DATETIME_FORMAT = "dd MM yyyy hh:mm:ss.SSS";
219module.exports.ABSOLUTETIME_FORMAT = "hh:mm:ss.SSS";
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