@metamask/logger/dist/options.mjs

A lightweight logging package using @metamask/streams

import { consoleTransport } from "./transports.mjs";
/**
 * The default options for the logger.
 */
export const DEFAULT_OPTIONS = {
    transports: [],
    level: 'info',
    tags: [],
};
/**
 * Parses the options for the logger.
 *
 * @param options - The options for the logger.
 * @returns The parsed options.
 */
export const parseOptions = (options) => {
    // The default case catches whatever is not explicitly handled below.
    // eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check
    switch (typeof options) {
        case 'object':
            return options;
        case 'string':
            return { tags: [options], transports: [consoleTransport] };
        case 'undefined':
            return { transports: [consoleTransport] };
        default:
            throw new Error('Invalid logger options');
    }
};
/**
 * Returns a copy of an array containing only its unique values.
 *
 * @param array - The array to filter.
 * @returns The array, without duplicate values.
 */
export const unique = (array) => {
    return array.filter((element, index, self) => self.indexOf(element) === index);
};
/**
 * Merges multiple logger options into a single options object.
 *
 * @param options - The options to merge.
 * @returns The merged options.
 */
export const mergeOptions = (...options) => options.reduce((acc, option) => ({
    transports: unique([...acc.transports, ...(option.transports ?? [])]),
    level: option.level ?? acc.level,
    tags: unique([...acc.tags, ...(option.tags ?? [])]),
}), DEFAULT_OPTIONS);
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