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node_modules/date-fns/_lib/format/lightFormatters.js

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+import { addLeadingZeros } from "../addLeadingZeros.js";
+
+/*
+ * |     | Unit                           |     | Unit                           |
+ * |-----|--------------------------------|-----|--------------------------------|
+ * |  a  | AM, PM                         |  A* |                                |
+ * |  d  | Day of month                   |  D  |                                |
+ * |  h  | Hour [1-12]                    |  H  | Hour [0-23]                    |
+ * |  m  | Minute                         |  M  | Month                          |
+ * |  s  | Second                         |  S  | Fraction of second             |
+ * |  y  | Year (abs)                     |  Y  |                                |
+ *
+ * Letters marked by * are not implemented but reserved by Unicode standard.
+ */
+
+export const lightFormatters = {
+  // Year
+  y(date, token) {
+    // From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_tokens
+    // | Year     |     y | yy |   yyy |  yyyy | yyyyy |
+    // |----------|-------|----|-------|-------|-------|
+    // | AD 1     |     1 | 01 |   001 |  0001 | 00001 |
+    // | AD 12    |    12 | 12 |   012 |  0012 | 00012 |
+    // | AD 123   |   123 | 23 |   123 |  0123 | 00123 |
+    // | AD 1234  |  1234 | 34 |  1234 |  1234 | 01234 |
+    // | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 |
+
+    const signedYear = date.getFullYear();
+    // Returns 1 for 1 BC (which is year 0 in JavaScript)
+    const year = signedYear > 0 ? signedYear : 1 - signedYear;
+    return addLeadingZeros(token === "yy" ? year % 100 : year, token.length);
+  },
+
+  // Month
+  M(date, token) {
+    const month = date.getMonth();
+    return token === "M" ? String(month + 1) : addLeadingZeros(month + 1, 2);
+  },
+
+  // Day of the month
+  d(date, token) {
+    return addLeadingZeros(date.getDate(), token.length);
+  },
+
+  // AM or PM
+  a(date, token) {
+    const dayPeriodEnumValue = date.getHours() / 12 >= 1 ? "pm" : "am";
+
+    switch (token) {
+      case "a":
+      case "aa":
+        return dayPeriodEnumValue.toUpperCase();
+      case "aaa":
+        return dayPeriodEnumValue;
+      case "aaaaa":
+        return dayPeriodEnumValue[0];
+      case "aaaa":
+      default:
+        return dayPeriodEnumValue === "am" ? "a.m." : "p.m.";
+    }
+  },
+
+  // Hour [1-12]
+  h(date, token) {
+    return addLeadingZeros(date.getHours() % 12 || 12, token.length);
+  },
+
+  // Hour [0-23]
+  H(date, token) {
+    return addLeadingZeros(date.getHours(), token.length);
+  },
+
+  // Minute
+  m(date, token) {
+    return addLeadingZeros(date.getMinutes(), token.length);
+  },
+
+  // Second
+  s(date, token) {
+    return addLeadingZeros(date.getSeconds(), token.length);
+  },
+
+  // Fraction of second
+  S(date, token) {
+    const numberOfDigits = token.length;
+    const milliseconds = date.getMilliseconds();
+    const fractionalSeconds = Math.trunc(
+      milliseconds * Math.pow(10, numberOfDigits - 3),
+    );
+    return addLeadingZeros(fractionalSeconds, token.length);
+  },
+};