huangzd1997
b5a1a51403
新增 duplicate-distribution.ts：按国家/站点聚合撞款分布与撞款 ASIN top 店铺。 TDD: task-116.test.ts 8 用例先 RED 后 GREEN。
47 lines
1.8 KiB
TypeScript
47 lines
1.8 KiB
TypeScript
/** 重复检查分布视图（任务 116）：按国家/站点聚合撞款与 top 店铺分布；纯逻辑。 */
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import type { DuplicateShop } from './duplicate-model.ts'
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export interface CountryDistributionRow {
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country: string
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asinCount: number
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shopCount: number
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}
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/** 按国家聚合分布(每店铺 country_codes 全量计入)。 */
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export function countryDistribution(shops: readonly DuplicateShop[]): CountryDistributionRow[] {
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const byCountry = new Map<string, { asinCount: number; shopCount: number }>()
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for (const item of shops) {
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for (const code of item.countryCodes) {
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const country = code.trim().toUpperCase()
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if (!country) continue
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const entry = byCountry.get(country) ?? { asinCount: 0, shopCount: 0 }
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entry.asinCount += item.asinCount
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entry.shopCount += 1
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byCountry.set(country, entry)
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}
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}
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return [...byCountry.entries()]
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.map(([country, entry]) => ({ country, asinCount: entry.asinCount, shopCount: entry.shopCount }))
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.sort((a, b) => b.asinCount - a.asinCount || a.country.localeCompare(b.country))
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}
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export interface SiteDistributionRow {
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site: string
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asinCount: number
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shopCount: number
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}
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/** 按站点(site)聚合：以单国家维度汇总撞款，站点取国家码。 */
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export function duplicateSiteDistribution(shops: readonly DuplicateShop[]): SiteDistributionRow[] {
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const rows = countryDistribution(shops)
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return rows.map((row) => ({ site: row.country, asinCount: row.asinCount, shopCount: row.shopCount }))
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}
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/** 按撞款 ASIN 数取 top 店铺(降序)，limit<=0 返回空。 */
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export function topShopsByAsin(shops: readonly DuplicateShop[], limit: number): DuplicateShop[] {
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if (!(limit > 0)) return []
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return [...shops]
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.sort((a, b) => b.asinCount - a.asinCount || a.shopName.localeCompare(b.shopName))
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.slice(0, Math.floor(limit))
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}
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