@nestjs/common/services/utils/filter-log-levels.util.js

Decorators, pipes, exceptions and utilities for NestJS applications: @Controller(), @Injectable(), @Body(), ValidationPipe, HttpException and more.

import { LOG_LEVELS } from '../log-levels.constant.js';
import { isLogLevel } from './is-log-level.util.js';
/**
 * @publicApi
 */
export function filterLogLevels(parseableString = '') {
    const sanitizedString = parseableString.replaceAll(' ', '').toLowerCase();
    if (sanitizedString[0] === '>') {
        const orEqual = sanitizedString[1] === '=';
        const logLevelIndex = LOG_LEVELS.indexOf(sanitizedString.substring(orEqual ? 2 : 1));
        if (logLevelIndex === -1) {
            throw new Error(`parse error (unknown log level): ${sanitizedString}`);
        }
        return LOG_LEVELS.slice(orEqual ? logLevelIndex : logLevelIndex + 1);
    }
    else if (sanitizedString.includes(',')) {
        return sanitizedString.split(',').filter(isLogLevel);
    }
    return isLogLevel(sanitizedString) ? [sanitizedString] : LOG_LEVELS;
}