90 lines
3.1 KiB
TypeScript
90 lines
3.1 KiB
TypeScript
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import { Solar } from 'lunar-typescript'
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import { ElementScore } from '../services/request'
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type ElementName = '木' | '火' | '土' | '金' | '水'
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export type FiveElementReport = {
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scores: ElementScore[]
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favorable: string
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unfavorable: string
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dayMaster: string
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}
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const stemElements: Record<string, ElementName> = {
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甲: '木', 乙: '木', 丙: '火', 丁: '火', 戊: '土', 己: '土', 庚: '金', 辛: '金', 壬: '水', 癸: '水'
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}
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const branchElements: Record<string, ElementName> = {
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子: '水', 丑: '土', 寅: '木', 卯: '木', 辰: '土', 巳: '火', 午: '火', 未: '土', 申: '金', 酉: '金', 戌: '土', 亥: '水'
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}
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const elementMeta: Record<ElementName, { color: string }> = {
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木: { color: '#36b85b' },
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火: { color: '#ef5a58' },
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土: { color: '#b46a18' },
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金: { color: '#d59a05' },
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水: { color: '#35bfe8' }
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}
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const scoreOrder: ElementName[] = ['土', '金', '水', '木', '火']
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const generationOrder: ElementName[] = ['木', '火', '土', '金', '水']
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const hourFromBirthHour = (birthHour: string) => {
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const numericHour = Number.parseInt(birthHour, 10)
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if (Number.isFinite(numericHour)) return Math.max(0, Math.min(23, numericHour))
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const branchHours: Record<string, number> = {
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子: 23, 丑: 1, 寅: 3, 卯: 5, 辰: 7, 巳: 9,
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午: 11, 未: 13, 申: 15, 酉: 17, 戌: 19, 亥: 21
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}
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return branchHours[birthHour.slice(0, 1)] ?? 12
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}
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export function calculateFiveElements(birthday: string, birthHour: string): FiveElementReport {
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const date = new Date(`${birthday}T00:00:00`)
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if (Number.isNaN(date.getTime())) {
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return {
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scores: scoreOrder.map((name) => ({ name, color: elementMeta[name].color, value: 20 })),
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favorable: '金水',
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unfavorable: '木火土',
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dayMaster: '壬'
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}
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}
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const solar = Solar.fromYmdHms(
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date.getFullYear(),
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date.getMonth() + 1,
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date.getDate(),
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hourFromBirthHour(birthHour),
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0,
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0
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)
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const eightChar = solar.getLunar().getEightChar()
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const pillars = [eightChar.getYear(), eightChar.getMonth(), eightChar.getDay(), eightChar.getTime()]
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const weights: Record<ElementName, number> = { 木: 0, 火: 0, 土: 0, 金: 0, 水: 0 }
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pillars.forEach((pillar) => {
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const [stem, branch] = pillar
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if (stemElements[stem]) weights[stemElements[stem]] += 2
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if (branchElements[branch]) weights[branchElements[branch]] += 1
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})
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const total = Object.values(weights).reduce((sum, value) => sum + value, 0)
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const scores = scoreOrder.map((name) => ({
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name,
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color: elementMeta[name].color,
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value: Math.round((weights[name] / total) * 100)
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}))
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const dayMaster = eightChar.getDay().slice(0, 1)
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const masterElement = stemElements[dayMaster] || '水'
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const masterIndex = generationOrder.indexOf(masterElement)
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const resourceElement = generationOrder[(masterIndex + generationOrder.length - 1) % generationOrder.length]
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const unfavorable = generationOrder.filter((element) => element !== resourceElement && element !== masterElement).join('')
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return {
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scores,
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favorable: `${resourceElement}${masterElement}`,
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unfavorable,
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dayMaster
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}
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}
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