feat(dashboard): add performance and operations slices

apps/dashboard/src/features/performance/performance-api.ts

@@ -0,0 +1,73 @@
+import {
+  DailyTrendResponseSchema,
+  StrategyPerformanceResponseSchema,
+  SubredditPerformanceResponseSchema,
+  SuccessfulExamplesResponseSchema,
+} from '../../../../../packages/api-contracts/src/index.js';
+import type { z } from 'zod';
+
+type SubredditPerformanceResponse = z.infer<typeof SubredditPerformanceResponseSchema>;
+type StrategyPerformanceResponse = z.infer<typeof StrategyPerformanceResponseSchema>;
+type DailyTrendResponse = z.infer<typeof DailyTrendResponseSchema>;
+type SuccessfulExamplesResponse = z.infer<typeof SuccessfulExamplesResponseSchema>;
+
+async function parseResponse<T>(
+  response: Response,
+  schema: { parse(value: unknown): T },
+): Promise<T> {
+  const payload: unknown = await response.json();
+  if (!response.ok) {
+    const message =
+      typeof payload === 'object' &&
+      payload !== null &&
+      'error' in payload &&
+      typeof payload.error === 'string'
+        ? payload.error
+        : `Request failed (${response.status})`;
+    throw new Error(message);
+  }
+  return schema.parse(payload);
+}
+
+export interface PerformanceApi {
+  getSubredditPerformance(): Promise<SubredditPerformanceResponse>;
+  getStrategyPerformance(): Promise<StrategyPerformanceResponse>;
+  getDailyTrend(days: number): Promise<DailyTrendResponse>;
+  getSuccessfulExamples(): Promise<SuccessfulExamplesResponse>;
+}
+
+export function createPerformanceApi(
+  fetchImplementation?: typeof fetch,
+) {
+  function request(path: string): Promise<Response> {
+    return (fetchImplementation ?? globalThis.fetch)(path);
+  }
+  return {
+    async getSubredditPerformance() {
+      return parseResponse(
+        await request('/api/analytics/by-subreddit'),
+        SubredditPerformanceResponseSchema,
+      );
+    },
+    async getStrategyPerformance() {
+      return parseResponse(
+        await request('/api/analytics/by-strategy'),
+        StrategyPerformanceResponseSchema,
+      );
+    },
+    async getDailyTrend(days: number) {
+      return parseResponse(
+        await request(`/api/analytics/trend?days=${days}`),
+        DailyTrendResponseSchema,
+      );
+    },
+    async getSuccessfulExamples() {
+      return parseResponse(
+        await request('/api/successful'),
+        SuccessfulExamplesResponseSchema,
+      );
+    },
+  } satisfies PerformanceApi;
+}
+
+export const performanceApi = createPerformanceApi();