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

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+import { getWeekYear } from "../../../getWeekYear.mjs";
+import { startOfWeek } from "../../../startOfWeek.mjs";
+import { Parser } from "../Parser.mjs";
+import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.mjs";
+
+// Local week-numbering year
+export class LocalWeekYearParser extends Parser {
+  priority = 130;
+
+  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, options) {
+    const currentYear = getWeekYear(date, options);
+
+    if (value.isTwoDigitYear) {
+      const normalizedTwoDigitYear = normalizeTwoDigitYear(
+        value.year,
+        currentYear,
+      );
+      date.setFullYear(
+        normalizedTwoDigitYear,
+        0,
+        options.firstWeekContainsDate,
+      );
+      date.setHours(0, 0, 0, 0);
+      return startOfWeek(date, options);
+    }
+
+    const year =
+      !("era" in flags) || flags.era === 1 ? value.year : 1 - value.year;
+    date.setFullYear(year, 0, options.firstWeekContainsDate);
+    date.setHours(0, 0, 0, 0);
+    return startOfWeek(date, options);
+  }
+
+  incompatibleTokens = [
+    "y",
+    "R",
+    "u",
+    "Q",
+    "q",
+    "M",
+    "L",
+    "I",
+    "d",
+    "D",
+    "i",
+    "t",
+    "T",
+  ];
+}