@teaui/core/.dist/log.js

A high-level terminal UI library for Node

import { inspect } from '@teaui/inspect';
import { removeAnsi } from '@teaui/term';
const levels = ['debug', 'error', 'info', 'log', 'warn'];
let logs = [];
const builtin = {};
levels.forEach(level => {
    builtin[level] = console[level];
});
export function interceptConsoleLog(logListener = appendLog) {
    levels.forEach(level => {
        console[level] = function (...args) {
            logListener(level, args);
        };
    });
    process.on('exit', _code => {
        flushLogs();
    });
}
export function decorateConsoleLog() {
    levels.forEach(level => {
        const log = console[level];
        if (log.isDecorated) {
            return;
        }
        ;
        log.isDecorated = true;
        console[level] = function (...args) {
            log(...args.map(arg => inspect(arg, true)));
        };
    });
}
const logListeners = new Set();
export function addListener(listener) {
    logListeners.add(listener);
}
export function removeListener(listener) {
    logListeners.delete(listener);
}
function appendLog(level, args) {
    logs.push({
        level,
        args: args.map(arg => typeof arg === 'string'
            ? inspect(removeAnsi(arg), true)
            : inspect(arg, true)),
    });
    if (level !== 'debug') {
        const logLine = logs[logs.length - 1];
        for (const listener of logListeners) {
            listener(logLine);
        }
    }
}
/**
 * Doesn't report 'console.debug' (I don't remember why). Clears logs, but keeps
 * console.debug, and returns the logs.
 */
export function fetchLogs() {
    const copy = logs.filter(({ level }) => level !== 'debug');
    logs = logs.filter(({ level }) => level === 'debug');
    return copy;
}
export function flushLogs() {
    logs.forEach(({ level, args }) => {
        builtin[level].apply(console, args);
    });
    logs.splice(0, logs.length);
    levels.forEach(level => {
        console[level] = builtin[level];
    });
}
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