Initial commit

node_modules/date-fns/parse/_lib/parsers/YearParser.mjs

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+import { Parser } from "../Parser.mjs";
+import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.mjs";
+
+// From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns
+// | 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 |
+export class YearParser extends Parser {
+  priority = 130;
+  incompatibleTokens = ["Y", "R", "u", "w", "I", "i", "e", "c", "t", "T"];
+
+  parse(dateString, token, match) {
+    const valueCallback = (year) => ({
+      year,
+      isTwoDigitYear: token === "yy",
+    });
+
+    switch (token) {
+      case "y":
+        return mapValue(parseNDigits(4, dateString), valueCallback);
+      case "yo":
+        return mapValue(
+          match.ordinalNumber(dateString, {
+            unit: "year",
+          }),
+          valueCallback,
+        );
+      default:
+        return mapValue(parseNDigits(token.length, dateString), valueCallback);
+    }
+  }
+
+  validate(_date, value) {
+    return value.isTwoDigitYear || value.year > 0;
+  }
+
+  set(date, flags, value) {
+    const currentYear = date.getFullYear();
+
+    if (value.isTwoDigitYear) {
+      const normalizedTwoDigitYear = normalizeTwoDigitYear(
+        value.year,
+        currentYear,
+      );
+      date.setFullYear(normalizedTwoDigitYear, 0, 1);
+      date.setHours(0, 0, 0, 0);
+      return date;
+    }
+
+    const year =
+      !("era" in flags) || flags.era === 1 ? value.year : 1 - value.year;
+    date.setFullYear(year, 0, 1);
+    date.setHours(0, 0, 0, 0);
+    return date;
+  }
+}