nofx/web/node_modules/date-fns/parse/_lib/parsers/Hour1to12Parser.js

import { numericPatterns } from "../constants.js";
import { Parser } from "../Parser.js";

import { parseNDigits, parseNumericPattern } from "../utils.js";

export class Hour1to12Parser extends Parser {
  priority = 70;

  parse(dateString, token, match) {
    switch (token) {
      case "h":
        return parseNumericPattern(numericPatterns.hour12h, dateString);
      case "ho":
        return match.ordinalNumber(dateString, { unit: "hour" });
      default:
        return parseNDigits(token.length, dateString);
    }
  }

  validate(_date, value) {
    return value >= 1 && value <= 12;
  }

  set(date, _flags, value) {
    const isPM = date.getHours() >= 12;
    if (isPM && value < 12) {
      date.setHours(value + 12, 0, 0, 0);
    } else if (!isPM && value === 12) {
      date.setHours(0, 0, 0, 0);
    } else {
      date.setHours(value, 0, 0, 0);
    }
    return date;
  }

  incompatibleTokens = ["H", "K", "k", "t", "T"];
}