date-fns/locale/ja/_lib/match.js

Modern JavaScript date utility library

import { buildMatchPatternFn } from "../../_lib/buildMatchPatternFn.js";
import { buildMatchFn } from "../../_lib/buildMatchFn.js";

const matchOrdinalNumberPattern = /^第?\d+(年|四半期|月|週|日|時|分|秒)?/i;
const parseOrdinalNumberPattern = /\d+/i;

const matchEraPatterns = {
  narrow: /^(B\.?C\.?|A\.?D\.?)/i,
  abbreviated: /^(紀元[前後]|西暦)/i,
  wide: /^(紀元[前後]|西暦)/i,
};
const parseEraPatterns = {
  narrow: [/^B/i, /^A/i],
  any: [/^(紀元前)/i, /^(西暦|紀元後)/i],
};

const matchQuarterPatterns = {
  narrow: /^[1234]/i,
  abbreviated: /^Q[1234]/i,
  wide: /^第[1234一二三四１２３４]四半期/i,
};
const parseQuarterPatterns = {
  any: [/(1|一|１)/i, /(2|二|２)/i, /(3|三|３)/i, /(4|四|４)/i],
};

const matchMonthPatterns = {
  narrow: /^([123456789]|1[012])/,
  abbreviated: /^([123456789]|1[012])月/i,
  wide: /^([123456789]|1[012])月/i,
};
const parseMonthPatterns = {
  any: [
    /^1\D/,
    /^2/,
    /^3/,
    /^4/,
    /^5/,
    /^6/,
    /^7/,
    /^8/,
    /^9/,
    /^10/,
    /^11/,
    /^12/,
  ],
};

const matchDayPatterns = {
  narrow: /^[日月火水木金土]/,
  short: /^[日月火水木金土]/,
  abbreviated: /^[日月火水木金土]/,
  wide: /^[日月火水木金土]曜日/,
};
const parseDayPatterns = {
  any: [/^日/, /^月/, /^火/, /^水/, /^木/, /^金/, /^土/],
};

const matchDayPeriodPatterns = {
  any: /^(AM|PM|午前|午後|正午|深夜|真夜中|夜|朝)/i,
};
const parseDayPeriodPatterns = {
  any: {
    am: /^(A|午前)/i,
    pm: /^(P|午後)/i,
    midnight: /^深夜|真夜中/i,
    noon: /^正午/i,
    morning: /^朝/i,
    afternoon: /^午後/i,
    evening: /^夜/i,
    night: /^深夜/i,
  },
};

export const match = {
  ordinalNumber: buildMatchPatternFn({
    matchPattern: matchOrdinalNumberPattern,
    parsePattern: parseOrdinalNumberPattern,
    valueCallback: function (value) {
      return parseInt(value, 10);
    },
  }),

  era: buildMatchFn({
    matchPatterns: matchEraPatterns,
    defaultMatchWidth: "wide",
    parsePatterns: parseEraPatterns,
    defaultParseWidth: "any",
  }),

  quarter: buildMatchFn({
    matchPatterns: matchQuarterPatterns,
    defaultMatchWidth: "wide",
    parsePatterns: parseQuarterPatterns,
    defaultParseWidth: "any",
    valueCallback: (index) => index + 1,
  }),

  month: buildMatchFn({
    matchPatterns: matchMonthPatterns,
    defaultMatchWidth: "wide",
    parsePatterns: parseMonthPatterns,
    defaultParseWidth: "any",
  }),

  day: buildMatchFn({
    matchPatterns: matchDayPatterns,
    defaultMatchWidth: "wide",
    parsePatterns: parseDayPatterns,
    defaultParseWidth: "any",
  }),

  dayPeriod: buildMatchFn({
    matchPatterns: matchDayPeriodPatterns,
    defaultMatchWidth: "any",
    parsePatterns: parseDayPeriodPatterns,
    defaultParseWidth: "any",
  }),
};