76 lines
1.5 KiB
TypeScript
76 lines
1.5 KiB
TypeScript
enum LogLevel {
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DEBUG,
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INFO,
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WARNING,
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ERROR,
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}
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class LogLine {
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constructor(public level: LogLevel, public message: string) {}
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public toString(): string {
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return `${this.formatLevel()}: ${this.message}`;
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}
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private formatLevel(): string {
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switch (this.level) {
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case LogLevel.DEBUG:
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return "DEBUG";
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case LogLevel.INFO:
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return "INFO";
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case LogLevel.WARNING:
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return "WARNING";
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case LogLevel.ERROR:
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return "ERROR";
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default:
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return "UNKNOWN";
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}
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}
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}
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export class Logger {
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private static readonly MAX_MESSAGES = 1000;
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private static instance: Logger;
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private messages: LogLine[] = [];
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private constructor() {}
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static getInstance(): Logger {
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if (!Logger.instance) {
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Logger.instance = new Logger();
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}
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return Logger.instance;
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}
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public debug(message: string): void {
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this.pushMessage(message, LogLevel.DEBUG);
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console.debug(message);
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}
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public info(message: string): void {
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this.pushMessage(message, LogLevel.INFO);
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console.log(message);
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}
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public warn(message: string): void {
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this.pushMessage(message, LogLevel.WARNING);
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console.warn(message);
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}
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public error(message: string): void {
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this.pushMessage(message, LogLevel.ERROR);
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console.error(message);
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}
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public getMessages(): LogLine[] {
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return this.messages;
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}
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private pushMessage(message: string, level: LogLevel): void {
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this.messages.push(new LogLine(level, message));
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if (this.messages.length > Logger.MAX_MESSAGES) {
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this.messages.shift();
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}
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}
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}
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