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import { sprintf, printf } from "https://deno.land/std/fmt/printf.ts";import { rgb8, bgRgb8 } from "https://deno.land/std/fmt/colors.ts";
// Copyright 2018-2020 https://github.com/deepakshrma. All rights reserved. MIT license.
/** * LogLevel: Enum => 0 | 1 | 2 | 3 */type LogLevel = 0 | 1 | 2 | 3;
interface LoggerOptions {  level?: LogLevel;  format?: string;  newLine?: boolean;}
/** * Default option: * initialOptions = { level: 0, format: "%s\n" }; */
const initialOptions = { level: 0, format: "%s", newLine: true };
/** * Logger * */class Logger {  static COLORS = {    BLACK: 0,    MAROON: 1,    GREEN: 2,    BLUE: 4,    PURPLE: 5,    LIGHT_GREY: 7,    GREY: 8,    RED: 9,    LIGHT_GREEN: 10,    YELLOW: 11,    CYAN: 14,    WHITE: 15,  };  /**   * #_level: LogLevel   */  private _level: LogLevel;  /**   * #_format: string   */  private _format: string;  /**   * #_appendNewLine: boolean   */  private _nl: boolean;  /**   * constructor() // Default value { level: 0, format: "%s\n" }   *   * @param options : LoggerOptions   */  constructor(options: LoggerOptions = initialOptions as LoggerOptions) {    const { level, format, newLine } = { ...initialOptions, ...options };    this._level = level as LogLevel;    this._format = format;    this._nl = newLine;    this.log = this.log.bind(this);    this.info = this.info.bind(this);    this.warn = this.warn.bind(this);    this.error = this.error.bind(this);    this.inverse = this.inverse.bind(this);    this.raw = this.raw.bind(this);  }  /**   * getter for _level   */  get level(): LogLevel {    return this._level;  }  /**   * setter for _level   */  set level(_l: LogLevel) {    this._level = _l;  }  /**   * getter for _format   */  get format(): string {    return this._format;  }  /**   * setter for _format   */  set format(_f: string) {    this._format = _f;  }  /**   * log: Prints log when log level is 0 with gray color   *   * @param format override default format or use as message   * @param messages accepts vargs any as printf/scanf   */  log(format: string, ...messages: unknown[]) {    if (this.level > 0) return;    if (messages.length === 0) {      messages = [format];      format = this.format;    }    this.raw(sprintf(format, ...messages), Logger.COLORS.GREY);  }  /**   * info: Prints log when log level is 0 with cyan color   *   * @param format override default format or use as message   * @param messages accepts vargs any as printf/scanf   */  info(format: string, ...messages: unknown[]) {    if (this.level > 1) return;    if (messages.length === 0) {      messages = [format];      format = this.format;    }    this.raw(sprintf(format, ...messages), Logger.COLORS.CYAN); //  }  /**   * warn: Prints log when log level is 0 with yellow color   *   * @param format override default format or use as message   * @param messages accepts vargs any as printf/scanf   */  warn(format: string, ...messages: unknown[]) {    if (this.level > 2) return;    if (messages.length === 0) {      messages = [format];      format = this.format;    }    this.raw(sprintf(format, ...messages), Logger.COLORS.YELLOW); //  }  /**   * error: Prints log when log level is 0 with red color   *   * @param format override default format or use as message   * @param messages accepts vargs any as printf/scanf   */  error(format: string, ...messages: unknown[]) {    if (messages.length === 0) {      messages = [format];      format = this.format;    }    this.raw(sprintf(format, ...messages), Logger.COLORS.RED); //  }  /**   * inverse:   *   * @param format override default format or use as message   * @param messages accepts vargs any as printf/scanf   */  inverse(format: string, ...messages: unknown[]) {    if (messages.length === 0) {      messages = [format];      format = this.format;    }    this.raw(      bgRgb8(sprintf(format, ...messages), Logger.COLORS.WHITE),      Logger.COLORS.GREY,    );  }
  /**   *   * @param message : message to print   * @param color : color to print. {default 15}   * @param nl : add or remove newline   */  raw(message: string, color: number = 15, nl: boolean = this._nl) {    printf(rgb8(message, color) + (nl ? "\n" : ""));  }
  /**   * line: print line with or without message   *   * @param message? message to print inside line   */  line(message?: string) {    const line = "==========================================================";    const messages = message ? [line, `||\t${message}`, line] : [line];    this.raw(messages.join("\n"));  }
  /**   * loading: show loader with message   *   * @param message?   */  loading(message: string = "") {    const events = ["-", "\\", "|", "/", "-", "\\", "|", "/"];    let index = 0;    const id = setInterval(() => {      Deno.stdout.write(        new TextEncoder().encode(`${message}${events[index]}\r`),      );      index += 1;      if (index === events.length) index = 0;    }, 500);    return () => {      printf("\n");      clearInterval(id);    };  }}
export { Logger, LogLevel, LoggerOptions };
/** * Example: How to use * *const logger = new Logger({ format: "Logger: %s" });logger.log("This is log message");logger.info("This is info message");
logger.error("This is error message");
/// Custom formatterlogger.info("My name is %s and my salary is: %d", "Deepak", 2000);logger.warn("My name is %s and my salary is: %d", "Deepak", 2000);logger.error("My name is %s and my salary is: %d", "Deepak", 2000);
// Change levellogger.level = 2;
// This will not printlogger.info("My name is %s and my salary is: %d", "Deepak", 2000);
// This will printlogger.warn("My name is %s and my salary is: %d", "Deepak", 2000);
// inverse messagelogger.inverse("This is inverse!!");
// print linelogger.line();
// print line with messagelogger.line("This will print inside line");
// Set logger.level to not accepted value, // Error
// logger.level = 5; // Error
// Change default formatlogger.level = 1;logger.format = "This is something new version: %s";
logger.info("1.0.1");logger.warn("1.0.2");
logger.raw("This is something new raw");
// Overridden printlogger.raw("This is something new version", 2, false);
console.log("\n=======================\n");// Using De-Structurelogger.format = "De-Structure: %s";const { inverse, error: logError } = logger;inverse("This is inverse");
logError("This is Error."); */
/** * Example: Loading message * */
/*const delay = (ms = 5000) => new Promise((r) => setTimeout(r, ms));
const logger = new Logger();const cancel = logger.loading("Loading..."); // start loader
delay().then(cancel);*/