c4dslbuilder/lib/utilities/cli-logger.js

A CLI tool designed to compile a folder structure of markdowns and mermaid files into a site, pdf, single file markdown or a collection of markdowns with links - inspired by c4builder

import chalk from 'chalk';
const logLevelPriority = {
    debug: 0,
    info: 1,
    warn: 2,
    error: 3,
    log: 4,
};
export class CliLogger {
    _tag;
    _level;
    /* c8 ignore next -- @preserve -- not explicitly testing the LOG_LEVEL env var */
    constructor(tag, level = process.env.LOG_LEVEL ?? 'log') {
        this._tag = tag;
        this._level = level;
    }
    getTimestamp() {
        return new Date().toISOString();
    }
    colour(level, message) {
        switch (level) {
            case 'debug':
                return chalk.gray(message);
            case 'info':
                return chalk.white(message);
            case 'warn':
                return chalk.yellow(message);
            case 'error':
                return chalk.red(message);
            default:
                return message;
        }
    }
    formatMessage(level, message, error = null) {
        const timestamp = this.getTimestamp();
        let baseMessage = message;
        if (level != 'log') {
            baseMessage = `[${timestamp}] [${level.toUpperCase()}] {${this._tag}} : ${message}`;
        }
        if (level === 'error' && error instanceof Error) {
            baseMessage += `\n\n${error.message}`;
        }
        return this.colour(level, baseMessage);
    }
    write(message) {
        process.stdout.write(message + '\n');
    }
    debug(msg) {
        if (logLevelPriority[this._level] <= logLevelPriority['debug']) {
            this.write(this.formatMessage('debug', msg));
        }
    }
    info(msg) {
        if (logLevelPriority[this._level] <= logLevelPriority['info']) {
            this.write(this.formatMessage('info', msg));
        }
    }
    warn(msg) {
        if (logLevelPriority[this._level] <= logLevelPriority['warn']) {
            this.write(this.formatMessage('warn', msg));
        }
    }
    error(msg, error = null) {
        if (logLevelPriority[this._level] <= logLevelPriority['error']) {
            this.write(this.formatMessage('error', msg, error));
        }
    }
    log(msg) {
        this.write(this.formatMessage('log', msg));
    }
}