feat: add admin analytics API endpoint with time-series data

lib/api/admin-analytics.ts

@@ -0,0 +1,104 @@
+import { Elysia } from "elysia"
+import { db } from "@/lib/db/index"
+import {
+  performanceEntries,
+  gameVersions,
+  games,
+  hardware,
+  user,
+  gameComments,
+} from "@/lib/db/schema"
+import { eq, count, sql, desc } from "drizzle-orm"
+import { requireModeratorOrAdmin } from "@/lib/auth/guard"
+
+export const adminAnalyticsRoutes = new Elysia({
+  prefix: "/admin/analytics",
+  detail: { tags: ["Admin"] },
+})
+
+// ── Overview: time-series data for charts ────────────────────────
+.get(
+  "/overview",
+  async ({ request, set }) => {
+    const guard = await requireModeratorOrAdmin(request.headers)
+    if (!guard.ok) {
+      set.status = guard.status
+      return { error: guard.error }
+    }
+
+    const ninetyDaysAgo = new Date()
+    ninetyDaysAgo.setDate(ninetyDaysAgo.getDate() - 90)
+
+    // Benchmark submissions per day (last 90 days)
+    const benchmarkTimeline = await db.execute(sql`
+      SELECT
+        DATE(pe.created_at) AS day,
+        COUNT(*)::int AS count
+      FROM performance_entries pe
+      WHERE pe.created_at >= ${ninetyDaysAgo}
+        AND pe.is_removed = false
+      GROUP BY DATE(pe.created_at)
+      ORDER BY day ASC
+    `)
+
+    // User registrations per day (last 90 days)
+    const userTimeline = await db.execute(sql`
+      SELECT
+        DATE(u.created_at) AS day,
+        COUNT(*)::int AS count
+      FROM "user" u
+      WHERE u.created_at >= ${ninetyDaysAgo}
+      GROUP BY DATE(u.created_at)
+      ORDER BY day ASC
+    `)
+
+    // Device distribution (total benchmarks per hardware)
+    const deviceDistribution = await db
+      .select({
+        hardwareSlug: performanceEntries.hardwareSlug,
+        hardwareName: hardware.name,
+        count: count(),
+      })
+      .from(performanceEntries)
+      .innerJoin(hardware, eq(performanceEntries.hardwareSlug, hardware.slug))
+      .where(eq(performanceEntries.isRemoved, false))
+      .groupBy(performanceEntries.hardwareSlug, hardware.name)
+      .orderBy(desc(count()))
+
+    // Genre popularity (top 10 genres by benchmark count)
+    const genrePopularity = await db.execute(sql`
+      SELECT
+        genre,
+        COUNT(*)::int AS count
+      FROM games g
+      CROSS JOIN LATERAL jsonb_array_elements_text(g.genres) AS genre
+      JOIN game_versions gv ON gv.game_id = g.id
+      JOIN performance_entries pe ON pe.version_id = gv.id
+      WHERE pe.is_removed = false
+        AND g.genres IS NOT NULL
+      GROUP BY genre
+      ORDER BY count DESC
+      LIMIT 10
+    `)
+
+    // Comment activity per day (last 90 days)
+    const commentTimeline = await db.execute(sql`
+      SELECT
+        DATE(gc.created_at) AS day,
+        COUNT(*)::int AS count
+      FROM game_comments gc
+      WHERE gc.created_at >= ${ninetyDaysAgo}
+        AND gc.is_removed = false
+      GROUP BY DATE(gc.created_at)
+      ORDER BY day ASC
+    `)
+
+    return {
+      benchmarkTimeline: benchmarkTimeline.rows,
+      userTimeline: userTimeline.rows,
+      deviceDistribution,
+      genrePopularity: genrePopularity.rows,
+      commentTimeline: commentTimeline.rows,
+    }
+  },
+)

lib/api/app.ts

@@ -24,6 +24,7 @@ import {
   adminCommentRoutes,
 } from "@/lib/api"
 import { adminStorageRoutes } from "@/lib/api/admin-storage"
+import { adminAnalyticsRoutes } from "@/lib/api/admin-analytics"
 import { steamSearchRoutes } from "@/lib/api/steam-search"
 import { steamdbVersionRoutes } from "@/lib/api/steamdb-version"
 import { searchUnifiedRoutes } from "@/lib/api/search-unified"
@@ -198,6 +199,7 @@ export const app = new Elysia({ prefix: "/api" })
       .use(adminPerformanceRoutes)
       .use(adminCommentRoutes)
       .use(adminStorageRoutes)
+      .use(adminAnalyticsRoutes)
   )
   // ── Strict rate limit (public forms, no auth) ───────────────
   .group("", (app) =>

lib/api/index.ts

@@ -16,6 +16,7 @@ export { adminReportRoutes } from "./admin-reports"
 export { adminPerformanceRoutes } from "./admin-performance"
 export { adminCommentRoutes } from "./admin-comments"
 export { adminStorageRoutes } from "./admin-storage"
+export { adminAnalyticsRoutes } from "./admin-analytics"
 export { steamdbVersionRoutes } from "./steamdb-version"
 export { steamgridProxyRoutes } from "./steamgrid-proxy"
 export { gamesManualRoutes } from "./games-manual"