| 1 | import chineseDaysData from 'chinese-days/dist/chinese-days.json' |
| 2 | import dayjs from 'dayjs' |
| 3 | import { isChineseLanguage } from '@/app/i18n/languageConfig' |
| 4 | import bmcxCalendarEvents2026Data from './data/china-calendar-events-2026.json' |
| 5 | import lunarSolarEventsData from './data/china-lunar-solar-events.json' |
| 6 | |
| 7 | export type CalendarFestivalType = 'holiday' | 'workday' | 'traditional' | 'solarTerm' | 'solarFestival' |
| 8 | |
| 9 | export interface CalendarFestivalInfo { |
| 10 | id?: string |
| 11 | type: CalendarFestivalType |
| 12 | nameKey?: string |
| 13 | shortNameKey?: string |
| 14 | name?: string |
| 15 | shortName?: string |
| 16 | statusKey: string |
| 17 | statusTitleKey: string |
| 18 | date?: string |
| 19 | lunarDateText?: string |
| 20 | weekday?: string |
| 21 | description?: string |
| 22 | imageUrl?: string |
| 23 | important?: boolean |
| 24 | display?: boolean |
| 25 | isHoliday: boolean |
| 26 | isWorkday: boolean |
| 27 | isInLieu: boolean |
| 28 | } |
| 29 | |
| 30 | export interface CalendarLunarInfo { |
| 31 | month: number |
| 32 | day: number |
| 33 | isLeap: boolean |
| 34 | monthKey: string |
| 35 | dayKey: string |
| 36 | leapPrefixKey: string |
| 37 | titleKey: string |
| 38 | } |
| 39 | |
| 40 | type CalendarFestivalKey |
| 41 | = | 'newYear' |
| 42 | | 'springFestival' |
| 43 | | 'qingming' |
| 44 | | 'labourDay' |
| 45 | | 'dragonBoat' |
| 46 | | 'midAutumn' |
| 47 | | 'nationalDay' |
| 48 | |
| 49 | interface ChinaHolidayData { |
| 50 | holidays: Record<string, string> |
| 51 | workdays: Record<string, string> |
| 52 | inLieuDays: Record<string, string> |
| 53 | } |
| 54 | |
| 55 | interface ChinaLunarDateItem { |
| 56 | month: number |
| 57 | day: number |
| 58 | isLeap: boolean |
| 59 | } |
| 60 | |
| 61 | interface ChinaLunarSolarDateItem { |
| 62 | lunar: ChinaLunarDateItem |
| 63 | traditional: string[] |
| 64 | solarTerms: string[] |
| 65 | } |
| 66 | |
| 67 | interface ChinaLunarSolarEventsData { |
| 68 | startYear: number |
| 69 | endYear: number |
| 70 | dates: Record<string, ChinaLunarSolarDateItem> |
| 71 | } |
| 72 | |
| 73 | interface BmcxCalendarEventItem { |
| 74 | id: string |
| 75 | name: string |
| 76 | shortName: string |
| 77 | type: 'solarFestival' | 'traditional' | 'solarTerm' |
| 78 | lunarMonth?: number |
| 79 | lunarDay?: number |
| 80 | important: boolean |
| 81 | display: boolean |
| 82 | imageUrl?: string |
| 83 | description?: string |
| 84 | } |
| 85 | |
| 86 | interface BmcxCalendarEventsData { |
| 87 | baseYear: number |
| 88 | solarFestivals: Record<string, BmcxCalendarEventItem[]> |
| 89 | lunarFestivals: Record<string, BmcxCalendarEventItem[]> |
| 90 | solarTerms: Record<string, BmcxCalendarEventItem[]> |
| 91 | } |
| 92 | |
| 93 | const chinaHolidayData: ChinaHolidayData = chineseDaysData |
| 94 | const chinaLunarSolarEventsData: ChinaLunarSolarEventsData = lunarSolarEventsData |
| 95 | const bmcxCalendarEventsData = bmcxCalendarEvents2026Data as BmcxCalendarEventsData |
| 96 | const bmcxCalendarEventNameMap = [ |
| 97 | ...Object.values(bmcxCalendarEventsData.solarFestivals).flat(), |
| 98 | ...Object.values(bmcxCalendarEventsData.lunarFestivals).flat(), |
| 99 | ...Object.values(bmcxCalendarEventsData.solarTerms).flat(), |
| 100 | ].reduce<Record<string, BmcxCalendarEventItem>>( |
| 101 | (result, items) => { |
| 102 | result[normalizeFestivalName(items.name)] ??= items |
| 103 | |
| 104 | return result |
| 105 | }, |
| 106 | {}, |
| 107 | ) |
| 108 | |
| 109 | const HOLIDAY_NAME_KEY_MAP: Record<string, CalendarFestivalKey> = { |
| 110 | 'New Year\'s Day': 'newYear', |
| 111 | 'Spring Festival': 'springFestival', |
| 112 | 'Tomb-sweeping Day': 'qingming', |
| 113 | 'Labour Day': 'labourDay', |
| 114 | 'Dragon Boat Festival': 'dragonBoat', |
| 115 | 'Mid-autumn Festival': 'midAutumn', |
| 116 | 'National Day': 'nationalDay', |
| 117 | } |
| 118 | |
| 119 | const HOLIDAY_CHINESE_NAME_MAP: Record<CalendarFestivalKey, string[]> = { |
| 120 | newYear: ['元旦'], |
| 121 | springFestival: ['春节'], |
| 122 | qingming: ['清明', '清明节'], |
| 123 | labourDay: ['劳动节'], |
| 124 | dragonBoat: ['端午节'], |
| 125 | midAutumn: ['中秋节'], |
| 126 | nationalDay: ['国庆节'], |
| 127 | } |
| 128 | |
| 129 | const FIXED_SOLAR_LEGAL_FESTIVAL_KEY_MAP: Record<string, CalendarFestivalKey> = { |
| 130 | '01-01': 'newYear', |
| 131 | '05-01': 'labourDay', |
| 132 | '10-01': 'nationalDay', |
| 133 | } |
| 134 | |
| 135 | const TRADITIONAL_CHINESE_NAME_MAP: Record<string, string[]> = { |
| 136 | laba: ['腊八节'], |
| 137 | xiaonian: ['北方小年', '南方小年', '小年'], |
| 138 | chuxi: ['除夕'], |
| 139 | springFestival: ['春节', '农历新年'], |
| 140 | lanternFestival: ['元宵节'], |
| 141 | dragonHeadsRaising: ['龙抬头'], |
| 142 | shangsi: ['上巳节'], |
| 143 | dragonBoat: ['端午节', '端午'], |
| 144 | qixi: ['七夕节', '七夕情人节', '七夕'], |
| 145 | zhongyuan: ['中元节'], |
| 146 | midAutumn: ['中秋节'], |
| 147 | doubleNinth: ['重阳节'], |
| 148 | hanYi: ['寒衣节'], |
| 149 | xiayuan: ['下元节'], |
| 150 | } |
| 151 | |
| 152 | const SOLAR_TERM_CHINESE_NAME_MAP: Record<string, string[]> = { |
| 153 | lesser_cold: ['小寒', '小寒节气'], |
| 154 | greater_cold: ['大寒', '大寒节气'], |
| 155 | the_beginning_of_spring: ['立春', '立春节气'], |
| 156 | rain_water: ['雨水', '雨水节气'], |
| 157 | the_waking_of_insects: ['惊蛰', '惊蛰节气'], |
| 158 | the_spring_equinox: ['春分', '春分节气'], |
| 159 | pure_brightness: ['清明', '清明节', '清明节气'], |
| 160 | grain_rain: ['谷雨', '谷雨节气'], |
| 161 | the_beginning_of_summer: ['立夏', '立夏节气'], |
| 162 | lesser_fullness_of_grain: ['小满', '小满节气'], |
| 163 | grain_in_beard: ['芒种', '芒种节气'], |
| 164 | the_summer_solstice: ['夏至', '夏至节气'], |
| 165 | lesser_heat: ['小暑', '小暑节气'], |
| 166 | greater_heat: ['大暑', '大暑节气'], |
| 167 | the_beginning_of_autumn: ['立秋', '立秋节气'], |
| 168 | the_end_of_heat: ['处暑', '处暑节气'], |
| 169 | white_dew: ['白露', '白露节气'], |
| 170 | the_autumn_equinox: ['秋分', '秋分节气'], |
| 171 | code_dew: ['寒露', '寒露节气'], |
| 172 | frost_descent: ['霜降', '霜降节气'], |
| 173 | the_beginning_of_winter: ['立冬', '立冬节气'], |
| 174 | lesser_snow: ['小雪', '小雪节气'], |
| 175 | greater_snow: ['大雪', '大雪节气'], |
| 176 | the_winter_solstice: ['冬至', '冬至节气'], |
| 177 | } |
| 178 | |
| 179 | type TranslateText = (key: string) => string |
| 180 | |
| 181 | export function getCalendarFestivalName(festival: CalendarFestivalInfo, t: TranslateText, compact = false) { |
| 182 | if (compact && festival.shortName) { |
| 183 | return festival.shortName |
| 184 | } |
| 185 | |
| 186 | if (!compact && festival.name) { |
| 187 | return festival.name |
| 188 | } |
| 189 | |
| 190 | const key = compact |
| 191 | ? festival.shortNameKey ?? festival.nameKey |
| 192 | : festival.nameKey ?? festival.shortNameKey |
| 193 | |
| 194 | return key ? t(key) : '' |
| 195 | } |
| 196 | |
| 197 | export function getCalendarFestivalTitle(festival: CalendarFestivalInfo, t: TranslateText) { |
| 198 | const name = getCalendarFestivalName(festival, t) |
| 199 | return `${name} · ${t(festival.statusTitleKey)}` |
| 200 | } |
| 201 | |
| 202 | export function getCalendarFestivalTabValue(festival: CalendarFestivalInfo, index: number) { |
| 203 | return festival.id ?? `${festival.type}-${festival.nameKey ?? festival.name ?? festival.shortName ?? index}-${index}` |
| 204 | } |
| 205 | |
| 206 | function getFestivalKey(name: string) { |
| 207 | const [englishName] = name.split(',') |
| 208 | return HOLIDAY_NAME_KEY_MAP[englishName] |
| 209 | } |
| 210 | |
| 211 | function normalizeFestivalName(name: string) { |
| 212 | return name |
| 213 | .trim() |
| 214 | .replace(/节气$/u, '') |
| 215 | } |
| 216 | |
| 217 | function findBmcxCalendarEvent(names: string[]) { |
| 218 | const nameSet = new Set(names.map(normalizeFestivalName)) |
| 219 | |
| 220 | for (const name of nameSet) { |
| 221 | const fallbackEvent = bmcxCalendarEventNameMap[name] |
| 222 | |
| 223 | if (fallbackEvent) { |
| 224 | return fallbackEvent |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | return undefined |
| 229 | } |
| 230 | |
| 231 | function getDateKey(dateStr: string) { |
| 232 | return dateStr.slice(5) |
| 233 | } |
| 234 | |
| 235 | function getLunarDateKey(lunar?: ChinaLunarDateItem) { |
| 236 | if (!lunar) { |
| 237 | return '' |
| 238 | } |
| 239 | |
| 240 | return `${String(lunar.month).padStart(2, '0')}-${String(lunar.day).padStart(2, '0')}` |
| 241 | } |
| 242 | |
| 243 | function getCurrentDateBmcxEvents(dateStr: string, lunarSolarEvent?: ChinaLunarSolarDateItem) { |
| 244 | const result: BmcxCalendarEventItem[] = [] |
| 245 | const eventIds = new Set<string>() |
| 246 | |
| 247 | const appendItems = (items?: BmcxCalendarEventItem[]) => { |
| 248 | for (const item of items ?? []) { |
| 249 | if (eventIds.has(item.id)) { |
| 250 | continue |
| 251 | } |
| 252 | |
| 253 | eventIds.add(item.id) |
| 254 | result.push(item) |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | appendItems(bmcxCalendarEventsData.solarFestivals[getDateKey(dateStr)]) |
| 259 | |
| 260 | const lunarDateKey = getLunarDateKey(lunarSolarEvent?.lunar) |
| 261 | if (lunarDateKey) { |
| 262 | appendItems(bmcxCalendarEventsData.lunarFestivals[lunarDateKey]) |
| 263 | } |
| 264 | |
| 265 | for (const solarTermKey of lunarSolarEvent?.solarTerms ?? []) { |
| 266 | for (const name of SOLAR_TERM_CHINESE_NAME_MAP[solarTermKey] ?? []) { |
| 267 | appendItems(bmcxCalendarEventsData.solarTerms[normalizeFestivalName(name)]) |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | return result |
| 272 | } |
| 273 | |
| 274 | function appendChineseNames(result: Set<string>, names?: string[]) { |
| 275 | names?.forEach(name => result.add(normalizeFestivalName(name))) |
| 276 | } |
| 277 | |
| 278 | function withBmcxMetadata(event: CalendarFestivalInfo, metadata?: BmcxCalendarEventItem): CalendarFestivalInfo { |
| 279 | if (!metadata) { |
| 280 | return event |
| 281 | } |
| 282 | |
| 283 | return { |
| 284 | ...event, |
| 285 | id: event.id ?? metadata.id, |
| 286 | description: metadata.description, |
| 287 | imageUrl: metadata.imageUrl, |
| 288 | important: metadata.important, |
| 289 | display: metadata.display, |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | function toBmcxCalendarFestivalInfo(item: BmcxCalendarEventItem, dateStr: string): CalendarFestivalInfo { |
| 294 | return { |
| 295 | id: item.id, |
| 296 | type: item.type, |
| 297 | name: item.name, |
| 298 | shortName: item.shortName, |
| 299 | statusKey: item.type === 'solarTerm' |
| 300 | ? 'calendar.chinaHolidays.status.solarTerm' |
| 301 | : item.type === 'traditional' |
| 302 | ? 'calendar.chinaHolidays.status.traditional' |
| 303 | : 'calendar.chinaHolidays.status.solarFestival', |
| 304 | statusTitleKey: item.type === 'solarTerm' |
| 305 | ? 'calendar.chinaHolidays.statusTitle.solarTerm' |
| 306 | : item.type === 'traditional' |
| 307 | ? 'calendar.chinaHolidays.statusTitle.traditional' |
| 308 | : 'calendar.chinaHolidays.statusTitle.solarFestival', |
| 309 | date: dateStr, |
| 310 | description: item.description, |
| 311 | imageUrl: item.imageUrl, |
| 312 | important: item.important, |
| 313 | display: item.display, |
| 314 | isHoliday: false, |
| 315 | isWorkday: false, |
| 316 | isInLieu: false, |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | function getAdditionalBmcxCalendarEvents( |
| 321 | dateStr: string, |
| 322 | lunarSolarEvent: ChinaLunarSolarDateItem | undefined, |
| 323 | existingNames: Set<string>, |
| 324 | ) { |
| 325 | return getCurrentDateBmcxEvents(dateStr, lunarSolarEvent) |
| 326 | .filter(item => !existingNames.has(normalizeFestivalName(item.name))) |
| 327 | .map(item => toBmcxCalendarFestivalInfo(item, dateStr)) |
| 328 | } |
| 329 | |
| 330 | function canShowChinaCalendarInfo(date: dayjs.ConfigType, lng?: string) { |
| 331 | if ((!lng || !isChineseLanguage(lng)) || !date) { |
| 332 | return false |
| 333 | } |
| 334 | |
| 335 | return true |
| 336 | } |
| 337 | |
| 338 | function getFallbackLegalFestivalKey(dateStr: string, lunarSolarEvent?: ChinaLunarSolarDateItem) { |
| 339 | const fixedSolarFestivalKey = FIXED_SOLAR_LEGAL_FESTIVAL_KEY_MAP[getDateKey(dateStr)] |
| 340 | |
| 341 | if (fixedSolarFestivalKey) { |
| 342 | return fixedSolarFestivalKey |
| 343 | } |
| 344 | |
| 345 | if (lunarSolarEvent?.traditional.includes('springFestival')) { |
| 346 | return 'springFestival' |
| 347 | } |
| 348 | |
| 349 | if (lunarSolarEvent?.traditional.includes('dragonBoat')) { |
| 350 | return 'dragonBoat' |
| 351 | } |
| 352 | |
| 353 | if (lunarSolarEvent?.traditional.includes('midAutumn')) { |
| 354 | return 'midAutumn' |
| 355 | } |
| 356 | |
| 357 | if (lunarSolarEvent?.solarTerms.includes('pure_brightness')) { |
| 358 | return 'qingming' |
| 359 | } |
| 360 | |
| 361 | return undefined |
| 362 | } |
| 363 | |
| 364 | function getLegalCalendarEvent(dateStr: string, lunarSolarEvent?: ChinaLunarSolarDateItem) { |
| 365 | const holidayName = chinaHolidayData.holidays[dateStr] |
| 366 | const workdayName = chinaHolidayData.workdays[dateStr] |
| 367 | const fallbackFestivalKey = getFallbackLegalFestivalKey(dateStr, lunarSolarEvent) |
| 368 | const festivalKey = getFestivalKey(holidayName || workdayName || '') ?? fallbackFestivalKey |
| 369 | |
| 370 | if (!festivalKey) { |
| 371 | return null |
| 372 | } |
| 373 | |
| 374 | const holiday = Boolean(holidayName || (!workdayName && fallbackFestivalKey)) |
| 375 | const workday = Boolean(workdayName) |
| 376 | |
| 377 | if (!holiday && !workday) { |
| 378 | return null |
| 379 | } |
| 380 | |
| 381 | return { |
| 382 | event: withBmcxMetadata({ |
| 383 | id: `legal-${dateStr}-${festivalKey}`, |
| 384 | type: workday ? 'workday' : 'holiday', |
| 385 | nameKey: `calendar.chinaHolidays.festivals.${festivalKey}`, |
| 386 | shortNameKey: `calendar.chinaHolidays.festivalShortNames.${festivalKey}`, |
| 387 | statusKey: workday |
| 388 | ? 'calendar.chinaHolidays.status.workday' |
| 389 | : 'calendar.chinaHolidays.status.holiday', |
| 390 | statusTitleKey: workday |
| 391 | ? 'calendar.chinaHolidays.statusTitle.adjustedWorkday' |
| 392 | : chinaHolidayData.inLieuDays[dateStr] |
| 393 | ? 'calendar.chinaHolidays.statusTitle.adjustedHoliday' |
| 394 | : 'calendar.chinaHolidays.statusTitle.holiday', |
| 395 | isHoliday: holiday, |
| 396 | isWorkday: workday, |
| 397 | isInLieu: Boolean(chinaHolidayData.inLieuDays[dateStr]), |
| 398 | display: true, |
| 399 | } satisfies CalendarFestivalInfo, findBmcxCalendarEvent(HOLIDAY_CHINESE_NAME_MAP[festivalKey])), |
| 400 | festivalKey, |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | export function getChinaCalendarEvents(date: dayjs.ConfigType, lng?: string): CalendarFestivalInfo[] { |
| 405 | if (!canShowChinaCalendarInfo(date, lng)) { |
| 406 | return [] |
| 407 | } |
| 408 | |
| 409 | const dateStr = dayjs(date).format('YYYY-MM-DD') |
| 410 | const events: CalendarFestivalInfo[] = [] |
| 411 | const lunarSolarEvent = chinaLunarSolarEventsData.dates[dateStr] |
| 412 | const legalEvent = getLegalCalendarEvent(dateStr, lunarSolarEvent) |
| 413 | const existingNames = new Set<string>() |
| 414 | |
| 415 | if (legalEvent) { |
| 416 | events.push(legalEvent.event) |
| 417 | appendChineseNames(existingNames, HOLIDAY_CHINESE_NAME_MAP[legalEvent.festivalKey]) |
| 418 | } |
| 419 | |
| 420 | if (!lunarSolarEvent) { |
| 421 | return events.concat(getAdditionalBmcxCalendarEvents(dateStr, undefined, existingNames)) |
| 422 | } |
| 423 | |
| 424 | for (const traditionalKey of lunarSolarEvent.traditional) { |
| 425 | appendChineseNames(existingNames, TRADITIONAL_CHINESE_NAME_MAP[traditionalKey]) |
| 426 | |
| 427 | if (traditionalKey === legalEvent?.festivalKey) { |
| 428 | continue |
| 429 | } |
| 430 | |
| 431 | events.push(withBmcxMetadata({ |
| 432 | id: `traditional-${dateStr}-${traditionalKey}`, |
| 433 | type: 'traditional', |
| 434 | nameKey: `calendar.chinaHolidays.traditional.${traditionalKey}`, |
| 435 | shortNameKey: `calendar.chinaHolidays.traditionalShortNames.${traditionalKey}`, |
| 436 | statusKey: 'calendar.chinaHolidays.status.traditional', |
| 437 | statusTitleKey: 'calendar.chinaHolidays.statusTitle.traditional', |
| 438 | isHoliday: false, |
| 439 | isWorkday: false, |
| 440 | isInLieu: false, |
| 441 | display: true, |
| 442 | }, findBmcxCalendarEvent(TRADITIONAL_CHINESE_NAME_MAP[traditionalKey] ?? []))) |
| 443 | } |
| 444 | |
| 445 | for (const solarTermKey of lunarSolarEvent.solarTerms) { |
| 446 | appendChineseNames(existingNames, SOLAR_TERM_CHINESE_NAME_MAP[solarTermKey]) |
| 447 | |
| 448 | if (legalEvent?.festivalKey === 'qingming' && solarTermKey === 'pure_brightness') { |
| 449 | continue |
| 450 | } |
| 451 | |
| 452 | events.push(withBmcxMetadata({ |
| 453 | id: `solar-term-${dateStr}-${solarTermKey}`, |
| 454 | type: 'solarTerm', |
| 455 | nameKey: `calendar.chinaHolidays.solarTerms.${solarTermKey}`, |
| 456 | shortNameKey: `calendar.chinaHolidays.solarTermShortNames.${solarTermKey}`, |
| 457 | statusKey: 'calendar.chinaHolidays.status.solarTerm', |
| 458 | statusTitleKey: 'calendar.chinaHolidays.statusTitle.solarTerm', |
| 459 | isHoliday: false, |
| 460 | isWorkday: false, |
| 461 | isInLieu: false, |
| 462 | display: true, |
| 463 | }, findBmcxCalendarEvent(SOLAR_TERM_CHINESE_NAME_MAP[solarTermKey] ?? []))) |
| 464 | } |
| 465 | |
| 466 | return events.concat(getAdditionalBmcxCalendarEvents(dateStr, lunarSolarEvent, existingNames)) |
| 467 | } |
| 468 | |
| 469 | export function getChinaCalendarDay(date: dayjs.ConfigType, lng?: string): CalendarFestivalInfo | null { |
| 470 | return getChinaCalendarEvents(date, lng)[0] ?? null |
| 471 | } |
| 472 | |
| 473 | export function filterCalendarFestivalEvents( |
| 474 | festivals: CalendarFestivalInfo[], |
| 475 | options: { showSolarFestivals: boolean, showSolarTerms: boolean }, |
| 476 | ) { |
| 477 | return festivals.filter((festival) => { |
| 478 | if (festival.type === 'solarFestival') { |
| 479 | return options.showSolarFestivals |
| 480 | } |
| 481 | |
| 482 | if (festival.type === 'solarTerm') { |
| 483 | return options.showSolarTerms |
| 484 | } |
| 485 | |
| 486 | return true |
| 487 | }) |
| 488 | } |
| 489 | |
| 490 | export function getChinaCalendarLunarInfo(date: dayjs.ConfigType, lng?: string): CalendarLunarInfo | null { |
| 491 | if (!canShowChinaCalendarInfo(date, lng)) { |
| 492 | return null |
| 493 | } |
| 494 | |
| 495 | const dateStr = dayjs(date).format('YYYY-MM-DD') |
| 496 | const lunar = chinaLunarSolarEventsData.dates[dateStr]?.lunar |
| 497 | |
| 498 | if (!lunar) { |
| 499 | return null |
| 500 | } |
| 501 | |
| 502 | return { |
| 503 | ...lunar, |
| 504 | monthKey: `calendar.chinaHolidays.lunarMonths.m${lunar.month}`, |
| 505 | dayKey: `calendar.chinaHolidays.lunarDays.d${lunar.day}`, |
| 506 | leapPrefixKey: 'calendar.chinaHolidays.lunar.leapPrefix', |
| 507 | titleKey: 'calendar.chinaHolidays.lunar.title', |
| 508 | } |
| 509 | } |
| 510 |