65 lines
1.4 KiB
TypeScript
65 lines
1.4 KiB
TypeScript
export type LogLevel = "info" | "warn" | "error" | "log";
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export class ConsoleLogger {
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print: boolean;
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callback: (level: LogLevel, entry: string) => void;
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constructor(
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callback: (level: LogLevel, entry: string) => void,
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print: boolean = true
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) {
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this.print = print;
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this.callback = callback;
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}
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log(...args: any[]): void {
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this.push("log", args);
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}
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warn(...args: any[]): void {
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this.push("warn", args);
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}
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error(...args: any[]): void {
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this.push("error", args);
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}
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info(...args: any[]): void {
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this.push("info", args);
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}
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push(level: LogLevel, args: any[]) {
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this.callback(level, this.logMessage(args));
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if (this.print) {
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console[level](...args);
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}
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}
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logMessage(values: any[]): string {
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let pieces: string[] = [];
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for (let val of values) {
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switch (typeof val) {
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case "string":
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case "number":
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pieces.push("" + val);
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break;
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case "undefined":
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pieces.push("undefined");
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break;
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default:
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try {
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let s = JSON.stringify(val, null, 2);
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if (s.length > 500) {
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s = s.substring(0, 500) + "...";
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}
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pieces.push(s);
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} catch {
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// May be cyclical reference
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pieces.push("[circular object]");
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}
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}
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}
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return pieces.join(" ");
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}
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}
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