logline/src/lib/util.js

logging the frontend

import config from './config';

const HAS_CONSOLE = window.console;
const LEVEL_CONSOLE_MAP = {
    INFO: 'log',
    WARN: 'warn',
    ERROR: 'error',
    CRITICAL: 'error'
};

// throw out Errors, with global prefix 'Logline: ' ahead of err.message
export function throwError(errMessage) {
    HAS_CONSOLE && console.error('Logline: ' + errMessage);
}

// print debug info in develper's console
// TODO: if WechatFE/vConsole is detected, will not use %c feature, as it is not well supported
export function debug(namespace, level, descriptor, data) {
    if (HAS_CONSOLE && config.get().verbose) {
        window.console[LEVEL_CONSOLE_MAP[level.toUpperCase()] || LEVEL_CONSOLE_MAP.INFO](`[${namespace}] ${level.toUpperCase()} ${descriptor}`, data || '');
    }
}

// filter any function in a object
export function filterFunction(obj) {
    var newObj = {}, i;

    if (typeof obj !== 'object') {
        return obj;
    }

    for (i in obj) {
        if (obj.hasOwnProperty(i)) {
            if (typeof obj[i] !== 'function') {
                newObj[i] = filterFunction(obj[i]);
            }
        }
    }
    return newObj;
}