feat: add logging

lib/cache/cache.ts

@@ -6,6 +6,7 @@ import {
   RedisValue,
 } from "https://deno.land/x/redis@v0.31.0/mod.ts";
 import { createLogger } from "@lib/log.ts";
+import { getTimeCacheKey } from "@lib/string.ts";
 
 const REDIS_HOST = Deno.env.get("REDIS_HOST");
 const REDIS_PASS = Deno.env.get("REDIS_PASS") || "";
@@ -82,6 +83,7 @@ export function expire(id: string, seconds: number) {
 
 type RedisOptions = {
   expires?: number;
+  noLog?: boolean;
 };
 
 export function del(key: string) {
@@ -97,7 +99,7 @@ export function set<T extends RedisValue>(
   content: T,
   options?: RedisOptions,
 ) {
-  log.debug("storing ", { id });
+  if (options?.noLog !== true) log.debug("storing ", { id });
   return cache.set(id, content, { ex: options?.expires || undefined });
 }
 

lib/cache/logs.ts

@@ -0,0 +1,37 @@
+import { createLogger } from "@lib/log.ts";
+import * as cache from "@lib/cache/cache.ts";
+import { getTimeCacheKey, parseTimeCacheKey } from "@lib/string.ts";
+
+const log = createLogger("");
+log.addEventListener("log", (data) => {
+  cache.set(`log:${getTimeCacheKey()}`, JSON.stringify(data.detail), {
+    noLog: true,
+  });
+});
+
+export type Log = {
+  scope: string;
+  level: number;
+  date: Date;
+  args: unknown[];
+};
+
+export async function getLogs() {
+  const d = new Date();
+  const year = d.getFullYear();
+  const month = d.getMonth().toString().padStart(2, "0");
+  const day = d.getDate().toString().padStart(2, "0");
+
+  const keys = await cache.keys(
+    `log:${year}:${month}:${day}:*`,
+  );
+
+  const logs = await Promise.all(
+    keys.map(async (key) => {
+      const date = parseTimeCacheKey(key);
+      return { ...JSON.parse(await cache.get<string>(key)), date } as Log;
+    }),
+  );
+
+  return logs.sort((a, b) => a.date.getTime() > b.date.getTime() ? -1 : 1);
+}

lib/cache/performance.ts

@@ -1,4 +1,5 @@
 import * as cache from "@lib/cache/cache.ts";
+import { getTimeCacheKey } from "@lib/string.ts";
 
 export type PerformancePoint = {
   path: string;
@@ -16,20 +17,14 @@ export type PerformanceRes = {
 };
 
 export const savePerformance = (url: string, milliseconds: number) => {
-  const d = new Date();
-  const year = d.getFullYear();
-  const month = d.getMonth().toString().padStart(2, "0");
-  const day = d.getDay().toString().padStart(2, "0");
-  const hour = d.getHours().toString().padStart(2, "0");
-  const minute = d.getMinutes().toString().padStart(2, "0");
-  const seconds = d.getSeconds().toString().padStart(2, "0");
+  const cacheKey = getTimeCacheKey();
 
   const u = new URL(url);
   if (u.pathname.includes("_frsh/")) return;
   u.searchParams.delete("__frsh_c");
 
   cache.set(
-    `performance:${year}:${month}:${day}:${hour}:${minute}:${seconds}`,
+    `performance:${cacheKey}`,
     JSON.stringify({
       path: decodeURIComponent(u.pathname),
       search: u.search,