100 lines
3.8 KiB
TypeScript
100 lines
3.8 KiB
TypeScript
import {
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isString,
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Logger,
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LoggingConfig,
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LogLevel,
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TaggedLogger,
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} from "./types";
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import moment from "moment";
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export type LoggingFunction = (...args: unknown[]) => void;
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// noinspection JSUnusedLocalSymbols
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const noopTaggedLogger: TaggedLogger = {
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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log(level: LogLevel, ...args: unknown[]): void {},
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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debug(...args: unknown[]): void {},
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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info(...args: unknown[]): void {},
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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warn(...args: unknown[]): void {},
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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error(...args: unknown[]): void {},
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// eslint-disable-next-line @typescript-eslint/no-unused-vars,@typescript-eslint/no-empty-function
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profile(...args: unknown[]): void {},
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};
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export interface ActivatableLogger extends Logger {
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init(config: LoggingConfig, loggingFunction?: LoggingFunction): void;
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}
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/**
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* TODO: Check if LoggingConfig.debug and LoggingConfig.profile are handled.
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*/
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export class ActivatableLoggerImpl implements ActivatableLogger {
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private config: LoggingConfig = new LoggingConfig(false, false, false);
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private loggingFunction: LoggingFunction = console.info;
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init(config: LoggingConfig, loggingFunction?: LoggingFunction): void {
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this.config = config;
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this.loggingFunction = loggingFunction || console.info;
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}
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tag(...tags: string[]): TaggedLogger {
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if (this.config.enabled) {
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const debug = this.config.debug;
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const profile = this.config.profile;
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const loggingFunction = this.loggingFunction;
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return {
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log(level: LogLevel, ...args: unknown[]): void {
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const timeStr = moment().format("YYYY-MM-DD HH:mm:ss");
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const levelStr = level.toUpperCase();
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const tagsStr = tags ? "[" + tags.join(", ") + "]" : "";
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const messagePrefix = `${timeStr} ${levelStr} - ${tagsStr}`;
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// Make sure to only replace %s, etc. in real log message
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// but not in tags.
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const escapedMessagePrefix = messagePrefix.replace(
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/%/g,
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"%%"
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);
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let message = "";
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if (args && isString(args[0])) {
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message = args[0];
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args.shift();
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}
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const logStr = message
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? `${escapedMessagePrefix} ${message}`
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: escapedMessagePrefix;
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loggingFunction(logStr, ...args);
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},
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debug(...args: unknown[]): void {
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if (debug) {
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this.log("debug", ...args);
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}
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},
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info(...args: unknown[]): void {
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this.log("info", ...args);
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},
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warn(...args: unknown[]): void {
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this.log("warn", ...args);
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},
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error(...args: unknown[]): void {
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this.log("error", ...args);
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},
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profile(...args: unknown[]): void {
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if (profile) {
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this.log("profile", ...args);
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}
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},
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};
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} else {
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return noopTaggedLogger;
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}
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}
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}
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export default new ActivatableLoggerImpl() as ActivatableLogger;
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