huaqiapp/utils/date.js

/**
 * 日期工具（统一 YYYY-MM-DD / YYYY-MM 字符串口径，与后端一致）
 */
const WEEK_TEXT = ['日', '一', '二', '三', '四', '五', '六']

export function pad(n) {
	return n < 10 ? '0' + n : '' + n
}

export function formatDate(date) {
	const d = date instanceof Date ? date : new Date(date)
	return d.getFullYear() + '-' + pad(d.getMonth() + 1) + '-' + pad(d.getDate())
}

export function today() {
	return formatDate(new Date())
}

export function monthOf(date) {
	return formatDate(date instanceof Date ? date : new Date(date)).slice(0, 7)
}

export function addDays(dateStr, days) {
	const d = new Date(dateStr.replace(/-/g, '/'))
	d.setDate(d.getDate() + days)
	return formatDate(d)
}

export function addMonths(monthStr, months) {
	const parts = monthStr.split('-')
	const d = new Date(Number(parts[0]), Number(parts[1]) - 1 + months, 1)
	return d.getFullYear() + '-' + pad(d.getMonth() + 1)
}

export function weekText(dateStr) {
	const d = new Date(dateStr.replace(/-/g, '/'))
	return '周' + WEEK_TEXT[d.getDay()]
}

export function dayText(dateStr) {
	const parts = dateStr.split('-')
	return Number(parts[1]) + '月' + Number(parts[2]) + '日'
}

export function monthText(monthStr) {
	const parts = monthStr.split('-')
	return parts[0] + '年' + Number(parts[1]) + '月'
}

/** 相对今天的描述：今天 / 明天 / 还有 N 天 / N 天前 */
export function relativeDay(dateStr) {
	const diff = Math.round((new Date(dateStr.replace(/-/g, '/')) - new Date(today().replace(/-/g, '/'))) / 86400000)
	if (diff === 0) return '今天'
	if (diff === 1) return '明天'
	if (diff === -1) return '昨天'
	return diff > 0 ? '还有 ' + diff + ' 天' : Math.abs(diff) + ' 天前'
}

/** 生成某月日历所需的空白格数（周日起始） */
export function leadingBlanks(monthStr) {
	const d = new Date(monthStr + '-01'.replace(/-/g, '/'))
	return d.getDay()
}

export const PHASE_META = {
	menstrual: { text: '经期', color: '#E8604C' },
	follicular: { text: '卵泡期', color: '#F5A65B' },
	ovulation: { text: '排卵期', color: '#F0796A' },
	luteal: { text: '黄体期', color: '#C79A7B' },
	unknown: { text: '', color: '#F1E4DC' }
}