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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.import {  getLevelByName,  getLevelName,  type LevelName,  type LogLevel,} from "./levels.ts";import type { LogRecord } from "./logger.ts";
export type FormatterFunction = (logRecord: LogRecord) => string;const DEFAULT_FORMATTER: FormatterFunction = ({ levelName, msg }) =>  `${levelName} ${msg}`;
export interface BaseHandlerOptions {  formatter?: FormatterFunction;}
export class BaseHandler {  #levelName: LevelName;  #level: LogLevel;  formatter: FormatterFunction;
  constructor(    levelName: LevelName,    { formatter = DEFAULT_FORMATTER }: BaseHandlerOptions = {},  ) {    this.#levelName = levelName;    this.#level = getLevelByName(levelName);    this.formatter = formatter;  }
  get level(): LogLevel {    return this.#level;  }
  set level(level: LogLevel) {    this.#level = level;    this.#levelName = getLevelName(level);  }
  get levelName(): LevelName {    return this.#levelName;  }  set levelName(levelName: LevelName) {    this.#levelName = levelName;    this.#level = getLevelByName(levelName);  }
  handle(logRecord: LogRecord) {    if (this.level > logRecord.level) return;
    const msg = this.format(logRecord);    this.log(msg);  }
  format(logRecord: LogRecord): string {    return this.formatter(logRecord);  }
  log(_msg: string) {}  setup() {}  destroy() {}
  [Symbol.dispose]() {    this.destroy();  }}