common: define types for Mayan sacred calendar (Tzolk'in)

common/src/mayan.test.ts

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+import {TzolkinName, tzolkinName, formatTzolkin} from './mayan';
+
+describe('tzolkinName', () => {
+  it('should return correct name for IMIX', () => {
+    expect(tzolkinName(TzolkinName.IMIX)).toBe('Imix');
+  });
+
+  it('should return correct name for IK', () => {
+    expect(tzolkinName(TzolkinName.IK)).toBe('Ikʼ');
+  });
+
+  it('should return correct name for AJAW', () => {
+    expect(tzolkinName(TzolkinName.AJAW)).toBe('Ajaw');
+  });
+});
+
+describe('formatTzolkin', () => {
+  it('should format tzolkin with number 1 and IMIX', () => {
+    expect(formatTzolkin({number: 1, name: TzolkinName.IMIX})).toBe('1 Imix');
+  });
+
+  it('should format tzolkin with number 13 and AJAW', () => {
+    expect(formatTzolkin({number: 13, name: TzolkinName.AJAW})).toBe('13 Ajaw');
+  });
+
+  it('should format tzolkin with number 7 and KABAN', () => {
+    expect(formatTzolkin({number: 7, name: TzolkinName.KABAN})).toBe('7 Kabʼan');
+  });
+});

common/src/mayan.ts

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+export enum TzolkinName {
+  IMIX,
+  IK,
+  AKBAL,
+  KAN,
+  CHIKCHAN,
+  KIMI,
+  MANIK,
+  LAMAT,
+  MULUK,
+  OK,
+  CHUWEN,
+  EB,
+  BEN,
+  IX,
+  MEN,
+  KIB,
+  KABAN,
+  ETZNAB,
+  KAWAK,
+  AJAW
+}
+
+export type TzolkinNumber = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13;
+
+export type Tzolkin = {
+  number: TzolkinNumber,
+  name: TzolkinName,
+};
+
+const tzolkinNames: Record<TzolkinName, string> = {
+  [TzolkinName.IMIX]: 'Imix',
+  [TzolkinName.IK]: 'Ikʼ',
+  [TzolkinName.AKBAL]: 'Akʼbʼal',
+  [TzolkinName.KAN]: 'Kʼan',
+  [TzolkinName.CHIKCHAN]: 'Chikchan',
+  [TzolkinName.KIMI]: 'Kimi',
+  [TzolkinName.MANIK]: 'Manikʼ',
+  [TzolkinName.LAMAT]: 'Lamat',
+  [TzolkinName.MULUK]: 'Muluk',
+  [TzolkinName.OK]: 'Ok',
+  [TzolkinName.CHUWEN]: 'Chuwen',
+  [TzolkinName.EB]: 'Ebʼ',
+  [TzolkinName.BEN]: 'Bʼen',
+  [TzolkinName.IX]: 'Ix',
+  [TzolkinName.MEN]: 'Men',
+  [TzolkinName.KIB]: 'Kibʼ',
+  [TzolkinName.KABAN]: 'Kabʼan',
+  [TzolkinName.ETZNAB]: 'Etzʼnabʼ',
+  [TzolkinName.KAWAK]: 'Kawak',
+  [TzolkinName.AJAW]: 'Ajaw',
+};
+
+export function tzolkinName(name: TzolkinName): string {
+  return tzolkinNames[name];
+}
+
+export function formatTzolkin(tzolkin: Tzolkin): string {
+  return `${tzolkin.number} ${tzolkinName(tzolkin.name)}`;
+}