All files / src/lib catalog-stats.ts

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import { prisma } from "./prisma.js";
 
/** Агрегаты по каталогу — открытые данные (без пользовательской приватной статистики). */
export interface CatalogStats {
  tracksCount: number;
  totalDistanceKm: number;
  totalElevationM: number;
  likesTotal: number;
  favoritesTotal: number;
  byType: { label: string; count: number }[];
  byLayout: { label: string; count: number }[];
  topLiked: { id: number; name: string; count: number }[];
  topFavorited: { id: number; name: string; count: number }[];
}
 
/** Считает публичные агрегаты каталога. Переиспользуется публичным /stats и админским /admin/stats. */
export async function computeCatalogStats(): Promise<CatalogStats> {
  const [
    tracksAgg,
    byTypeRaw,
    byLayoutRaw,
    likesTotal,
    favoritesTotal,
    types,
    layouts,
    topLikedRows,
    topFavRows,
  ] = await Promise.all([
    prisma.gpxTrack.aggregate({
      where: { deletedAt: null },
      _count: { _all: true },
      _sum: { distanceKm: true, elevationM: true },
    }),
    prisma.gpxTrack.groupBy({
      by: ["trackTypeId"],
      where: { deletedAt: null },
      _count: { _all: true },
    }),
    prisma.gpxTrack.groupBy({
      by: ["routeLayoutId"],
      where: { deletedAt: null },
      _count: { _all: true },
    }),
    prisma.trackLike.count(),
    prisma.trackFavorite.count(),
    prisma.trackType.findMany({ select: { id: true, label: true } }),
    prisma.routeLayout.findMany({ select: { id: true, label: true } }),
    prisma.gpxTrack.findMany({
      where: { deletedAt: null },
      select: { id: true, name: true, _count: { select: { likes: true } } },
      orderBy: { likes: { _count: "desc" } },
      take: 5,
    }),
    prisma.gpxTrack.findMany({
      where: { deletedAt: null },
      select: { id: true, name: true, _count: { select: { favorites: true } } },
      orderBy: { favorites: { _count: "desc" } },
      take: 5,
    }),
  ]);
 
  const typeLabel = new Map(types.map((t) => [t.id, t.label]));
  const layoutLabel = new Map(layouts.map((l) => [l.id, l.label]));
 
  return {
    tracksCount: tracksAgg._count._all,
    totalDistanceKm: Math.round((tracksAgg._sum.distanceKm ?? 0) * 10) / 10,
    totalElevationM: Math.round(tracksAgg._sum.elevationM ?? 0),
    likesTotal,
    favoritesTotal,
    byType: byTypeRaw
      .map((r) => ({ label: typeLabel.get(r.trackTypeId) ?? "?", count: r._count._all }))
      .sort((a, b) => b.count - a.count),
    byLayout: byLayoutRaw
      .map((r) => ({ label: layoutLabel.get(r.routeLayoutId) ?? "?", count: r._count._all }))
      .sort((a, b) => b.count - a.count),
    topLiked: topLikedRows
      .filter((t) => t._count.likes > 0)
      .map((t) => ({ id: t.id, name: t.name, count: t._count.likes })),
    topFavorited: topFavRows
      .filter((t) => t._count.favorites > 0)
      .map((t) => ({ id: t.id, name: t.name, count: t._count.favorites })),
  };
}
 
/** JSON-схема публичных полей статистики (для ответов Fastify). */
export const catalogStatsProperties = {
  tracksCount: { type: "integer" },
  totalDistanceKm: { type: "number" },
  totalElevationM: { type: "integer" },
  likesTotal: { type: "integer" },
  favoritesTotal: { type: "integer" },
  byType: {
    type: "array",
    items: {
      type: "object",
      required: ["label", "count"],
      additionalProperties: false,
      properties: { label: { type: "string" }, count: { type: "integer" } },
    },
  },
  byLayout: {
    type: "array",
    items: {
      type: "object",
      required: ["label", "count"],
      additionalProperties: false,
      properties: { label: { type: "string" }, count: { type: "integer" } },
    },
  },
  topLiked: {
    type: "array",
    items: {
      type: "object",
      required: ["id", "name", "count"],
      additionalProperties: false,
      properties: { id: { type: "integer" }, name: { type: "string" }, count: { type: "integer" } },
    },
  },
  topFavorited: {
    type: "array",
    items: {
      type: "object",
      required: ["id", "name", "count"],
      additionalProperties: false,
      properties: { id: { type: "integer" }, name: { type: "string" }, count: { type: "integer" } },
    },
  },
} as const;
 
/** Имена публичных полей статистики — required в схемах. */
export const catalogStatsRequired = [
  "tracksCount",
  "totalDistanceKm",
  "totalElevationM",
  "likesTotal",
  "favoritesTotal",
  "byType",
  "byLayout",
  "topLiked",
  "topFavorited",
] as const;