dc-api-core/log.js at master · DimaCrafter/dc-api-core · GitHub

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const { splitError } = require('./errors');
const { getArg } = require('./utils');

const LOG_COLORS = {
    INFO: {
        ansi: 6,
        named: 39,
        rgb: [0, 192, 255]
    },
    OK: {
        ansi: 2,
        named: 35,
        rgb: [0, 192, 64]
    },
    WARN: {
        ansi: 3,
        named: 202,
        rgb: [255, 112, 0]
    },
    ERR: {
        ansi: 1,
        named: 160,
        rgb: [224, 0, 0]
    }
};

const FG = 30;
const BG = 40;
const RESET = '\x1B[0m';
const BOLD = '\x1B[1m';

const currentTheme = {};
function buildTheme (pallette) {
    let parser;
    switch (pallette) {
        case 'rgb':
            parser = (color, offset) => `\x1B[${offset + 8};2;${color[0]};${color[1]};${color[2]}m`;
            break;
        case 'named':
            parser = (color, offset) => `\x1B[${offset + 8};5;${color}m`;
            break;
        case 'ansi':
            parser = (color, offset = FG) => `\x1B[${color + offset}m`;
            break;
        default:
            process.stdout.write(`Unknown color pallette "${pallette}"\n`);
            process.exit(-1);
    }

    for (const type in LOG_COLORS) {
        currentTheme[type] = parser(LOG_COLORS[type][pallette], BG);
    }

    currentTheme.ERR_LINE = parser(LOG_COLORS.ERR[pallette], FG);
    currentTheme.TEXT = parser(({ ansi: 7, named: 255, rgb: [255, 255, 255] })[pallette], FG);
}

// todo! doc changes
let pallette = getArg('--colors');
if (!pallette) {
    if (process.env.COLORTERM) {
        if (process.env.COLORTERM == 'truecolor' || process.env.COLORTERM == 'x24') {
            pallette = 'rgb';
        } else if (~process.env.COLORTERM.indexOf('256color')) {
            pallette = 'named';
        }
    } else {
        pallette = 'ansi';
    }
}

buildTheme(pallette);

const print = (type, text) => {
    process.stdout.write(`${currentTheme[type]}${currentTheme.TEXT}${BOLD} ${type} ${RESET} ${text}${RESET}\n`);
}

exports.text = text => process.stdout.write(text + '\n'),
exports.info = text => print('INFO', text),
exports.success = text => print('OK', text),
exports.warn = text => print('WARN', text),
exports.error = (text, error) => {
    print('ERR', text);
    if (error) {
        if (!(error instanceof Array)) error = splitError(error);

        for (const line of error) {
            process.stdout.write(` ${currentTheme.ERR_LINE}│${RESET} ${line}\n`);
        }

        process.stdout.write(` ${currentTheme.ERR_LINE}└─${RESET}\n`);
    }
}