Add callback output

src/outputs/Callback.ts

@@ -0,0 +1,20 @@
+import { LogContext, LogMeta } from "../types/logger";
+import { Loggable } from "../interface/output";
+import { CallbackOutputConfig } from "../types/output";
+
+export default class Callback implements Loggable {
+  private callback:
+    | ((message: string, meta: LogMeta, context: LogContext) => void)
+    | ((message: string, meta: LogMeta, context: LogContext) => Promise<void>)
+    | undefined;
+  enabled: boolean;
+  constructor(config: CallbackOutputConfig) {
+    this.enabled = config.enabled;
+    this.callback = config.callback;
+  }
+  write(message: string, meta: LogMeta, context: LogContext): void {
+    if (this.callback) {
+      this.callback(message, meta, context);
+    }
+  }
+}

src/types/logger.ts

@@ -1,3 +1,5 @@
+import { z } from "zod";
+
 export enum LogLevel {
   TRACE = 10,
   DEBUG = 20,
@@ -14,14 +16,16 @@ export enum LogLabel {
   FATAL = "fatal",
 }
 
-export interface LogContext {
-  [key: string]: any;
-}
+export const LogContext = z.record(z.any());
 
-export interface LogMeta {
-  level: LogLevel;
-  time: Date;
-}
+export type LogContext = z.infer<typeof LogContext>;
+
+export const LogMeta = z.object({
+  level: z.nativeEnum(LogLevel),
+  time: z.date(),
+});
+
+export type LogMeta = z.infer<typeof LogMeta>;
 
 export interface LogData {
   message: string;

src/types/output.ts

@@ -1,3 +1,4 @@
+import { LogContext, LogMeta } from "logger";
 import { z } from "zod";
 
 export const ConsoleStyles = z
@@ -123,3 +124,11 @@ export interface TampermonkeyBucketInfo {
   size: number;
   createdAt: number;
 }
+
+export interface CallbackOutputConfig {
+  enabled: boolean;
+  callback:
+    | ((message: string, meta: LogMeta, context: LogContext) => void)
+    | ((message: string, meta: LogMeta, context: LogContext) => Promise<void>)
+    | undefined;
+}