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65 lines
No EOL
1.3 KiB
TypeScript
65 lines
No EOL
1.3 KiB
TypeScript
import { open, File, Writer } from "deno";
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import { getLevelByName } from "./levels.ts";
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import { LogRecord } from "./logger.ts";
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export class BaseHandler {
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level: number;
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levelName: string;
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constructor(levelName: string) {
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this.level = getLevelByName(levelName);
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this.levelName = levelName;
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}
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handle(logRecord: LogRecord) {
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if (this.level > logRecord.level) return;
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// TODO: implement formatter
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const msg = `${logRecord.levelName} ${logRecord.msg}`;
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return this.log(msg);
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}
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log(msg: string) { }
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async setup() { }
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async destroy() { }
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}
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export class ConsoleHandler extends BaseHandler {
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log(msg: string) {
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console.log(msg);
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}
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}
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export abstract class WriterHandler extends BaseHandler {
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protected _writer: Writer;
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log(msg: string) {
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const encoder = new TextEncoder();
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// promise is intentionally not awaited
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this._writer.write(encoder.encode(msg + "\n"));
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}
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}
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export class FileHandler extends WriterHandler {
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private _file: File;
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private _filename: string;
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constructor(levelName: string, filename: string) {
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super(levelName);
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this._filename = filename;
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}
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async setup() {
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// open file in append mode - write only
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this._file = await open(this._filename, 'a');
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this._writer = this._file;
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}
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async destroy() {
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await this._file.close();
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}
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} |