47 lines
1004 B
JavaScript
47 lines
1004 B
JavaScript
'use strict';
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const MethodFactory = require('../lib/MethodFactory');
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const defaults = {
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level: opts => `[${opts.level}]`,
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name: opts => opts.logger.name,
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template: '{{time}} {{level}} ',
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time: () => new Date().toTimeString().split(' ')[0]
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};
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module.exports = class PrefixFactory extends MethodFactory {
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constructor(logger, options) {
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super(logger);
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this.options = Object.assign({}, defaults, options);
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}
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interpolate(level) {
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return this.options.template.replace(/{{([^{}]*)}}/g, (stache, prop) => {
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const fn = this.options[prop];
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if (fn) {
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return fn({ level, logger: this.logger });
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}
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return stache;
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});
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}
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make(methodName) {
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const og = super.make(methodName);
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return (...args) => {
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const output = this.interpolate(methodName);
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const [first] = args;
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if (typeof first === 'string') {
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args[0] = output + first;
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} else {
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args.unshift(output);
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}
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og(...args);
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};
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}
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};
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