web/packages/common/dataCache/DistributedCache/get.ts

import * as Sentry from "@sentry/nextjs"

import { env } from "../../env/server"
import { safeTry } from "../../utils/safeTry"
import { cacheLogger } from "../logger"
import { getCacheEndpoint } from "./endpoints"

const API_KEY = env.REDIS_API_KEY ?? ""
export async function get<T>(key: string) {
  const perf = performance.now()

  const [response, error] = await safeTry(
    fetch(getCacheEndpoint(key), {
      method: "GET",
      cache: "no-cache",
      headers: {
        "x-api-key": API_KEY,
      },
      signal: AbortSignal.timeout(3_000),
    })
  )

  const isJson = response?.headers
    .get("content-type")
    ?.includes("application/json")
  if (!response || !response.ok || error || !isJson) {
    if (response?.status === 404) {
      cacheLogger.debug(
        `Miss '${key}' took ${(performance.now() - perf).toFixed(2)}ms`
      )
      return undefined
    }

    cacheLogger.error(`Failed to get cache for key '${key}'`, {
      cacheKey: key,
      statusCode: response?.status,
      statusText: response?.statusText,
      isJson,
      contentType: response?.headers.get("content-type"),
      error: serializeError(error),
    })

    Sentry.captureException(error ?? new Error("Unable to GET cachekey"), {
      extra: {
        cacheKey: key,
        statusCode: response?.status,
        statusText: response?.statusText,
        contentType: response?.headers.get("content-type"),
      },
    })
    return undefined
  }

  const [data, jsonError] = await safeTry(
    response.json() as Promise<{ data: T }>
  )

  if (jsonError) {
    cacheLogger.error(`Failed to parse cache response for key '${key}'`, {
      cacheKey: key,
      error: serializeError(jsonError),
    })
    Sentry.captureException(
      jsonError ?? new Error("Unable to parse cache response"),
      {
        extra: {
          cacheKey: key,
          statusCode: response?.status,
          statusText: response?.statusText,
          contentType: response?.headers.get("content-type"),
        },
      }
    )

    return undefined
  }

  cacheLogger.debug(
    `Hit '${key}' took ${(performance.now() - perf).toFixed(2)}ms`
  )

  return data?.data
}

function serializeError(error: unknown):
  | string
  | {
      name: string
      message: string
      stack?: string
      cause?: unknown
    } {
  if (error instanceof Error) {
    return {
      name: error.name,
      message: error.message,
      stack: error.stack,
      cause: error.cause ? serializeError(error.cause) : undefined,
    }
  } else {
    return String(error)
  }
}