forked from zhouruizhe/gmTouringMiniApp
119 lines
4.0 KiB
TypeScript
119 lines
4.0 KiB
TypeScript
import {
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type BudgetLevel,
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type Duration,
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type Interest,
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type Pace,
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type Theme,
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type Transport,
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TRAVEL_BUDGET_LEVELS,
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TRAVEL_DURATIONS,
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TRAVEL_INTERESTS,
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TRAVEL_PACES,
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TRAVEL_THEMES,
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TRAVEL_TRANSPORTS,
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type TravelPreferences,
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} from './types'
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const DESTINATION = '深圳市光明区' as const
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export class TravelValidationError extends Error {
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constructor(message: string) {
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super(message)
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this.name = 'TravelValidationError'
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}
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}
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function isRecord(value: unknown): value is Record<string, unknown> {
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return typeof value === 'object' && value !== null && !Array.isArray(value)
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}
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function isEnumValue<T extends string>(value: unknown, allowed: readonly T[]): value is T {
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return typeof value === 'string' && allowed.includes(value as T)
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}
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function normalizeEnumArray<T extends string>(
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value: unknown,
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allowed: readonly T[],
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fieldName: string,
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): T[] {
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if (!Array.isArray(value) || value.some(item => !isEnumValue(item, allowed)))
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throw new TravelValidationError(`${fieldName}包含无效选项`)
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const selected = new Set(value as T[])
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return allowed.filter(item => selected.has(item))
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}
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function normalizeInteger(value: unknown, fieldName: string, min: number, max: number): number {
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if (!Number.isInteger(value) || (value as number) < min || (value as number) > max)
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throw new TravelValidationError(`${fieldName}必须是 ${min} 至 ${max} 的整数`)
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return value as number
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}
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export function normalizeTravelPreferences(value: unknown): TravelPreferences {
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if (!isRecord(value))
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throw new TravelValidationError('出行偏好格式无效')
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if (value.destination !== DESTINATION)
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throw new TravelValidationError('当前仅支持深圳市光明区')
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const themes = normalizeEnumArray<Theme>(value.themes, TRAVEL_THEMES, '出行主题')
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const interests = normalizeEnumArray<Interest>(value.interests, TRAVEL_INTERESTS, '特色偏好')
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if (themes.length === 0 && interests.length === 0)
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throw new TravelValidationError('主题或特色偏好至少选择一项')
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if (!isEnumValue<Duration>(value.duration, TRAVEL_DURATIONS))
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throw new TravelValidationError('游玩时长无效')
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if (!isEnumValue<Pace>(value.pace, TRAVEL_PACES))
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throw new TravelValidationError('行程节奏无效')
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if (!isEnumValue<Transport>(value.transport, TRAVEL_TRANSPORTS))
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throw new TravelValidationError('交通方式无效')
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if (!isEnumValue<BudgetLevel>(value.budgetLevel, TRAVEL_BUDGET_LEVELS))
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throw new TravelValidationError('预算档位无效')
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const adults = normalizeInteger(value.adults, '成人数量', 0, 20)
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const children = normalizeInteger(value.children, '儿童数量', 0, 20)
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if (adults + children < 1)
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throw new TravelValidationError('出行总人数至少为 1')
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if (!Array.isArray(value.childAges) || value.childAges.length !== children)
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throw new TravelValidationError('儿童年龄数量必须与儿童人数一致')
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const childAges = value.childAges.map(age => normalizeInteger(age, '儿童年龄', 0, 17))
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if (typeof value.extraRequirements !== 'string')
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throw new TravelValidationError('补充要求格式无效')
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const extraRequirements = value.extraRequirements.trim()
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if (extraRequirements.length > 500)
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throw new TravelValidationError('补充要求不能超过 500 字')
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return {
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destination: DESTINATION,
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themes,
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duration: value.duration,
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pace: value.pace,
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interests,
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adults,
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children,
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childAges,
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transport: value.transport,
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budgetLevel: value.budgetLevel,
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extraRequirements,
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}
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}
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export function isTravelPreferences(value: unknown): value is TravelPreferences {
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try {
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normalizeTravelPreferences(value)
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return true
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}
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catch {
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return false
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}
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}
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export function cloneTravelPreferences(preferences: TravelPreferences): TravelPreferences {
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const normalized = normalizeTravelPreferences(preferences)
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return {
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...normalized,
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themes: [...normalized.themes],
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interests: [...normalized.interests],
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childAges: [...normalized.childAges],
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}
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}
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