69 lines
2.0 KiB
TypeScript
69 lines
2.0 KiB
TypeScript
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import { pad } from 'https://deno.land/std@0.36.0/strings/pad.ts';
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import { FormatterFunction } from 'https://deno.land/std@0.151.0/log/handlers.ts';
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import { LogRecord } from 'https://deno.land/std@0.151.0/log/logger.ts';
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// See: https://github.com/denoland/deno_std/blob/0.151.0/log/README.md#custom-message-format
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export const createFormatter = ({
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showTime = false,
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showLogger = false,
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showLevel = false,
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showLevelName = true,
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showBrackets = true,
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depth = 3,
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} = {}): FormatterFunction => {
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const column = (value: string) => (showBrackets ? `[${value}]` : ` ${value}`);
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return ({ level, levelName, msg, args, loggerName }: LogRecord) => {
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let line = '';
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if (showLogger) {
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line += column(loggerName);
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}
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if (showTime) {
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const now = new Date();
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const hours = pad(`${now.getHours()}`, 2, { char: '0' });
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const minutes = pad(`${now.getMinutes()}`, 2, { char: '0' });
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const seconds = pad(`${now.getSeconds()}`, 2, { char: '0' });
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const time = [hours, minutes, seconds].join(':');
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line += column(time);
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}
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if (showLevelName) {
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const shortName = levelName.length <= 5 ? levelName : levelName.slice(0, 4);
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line += column(`${pad(shortName, 5, { side: 'left' })}`);
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}
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if (showLevel) {
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line += column(level);
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}
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if (msg) {
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if (line.length > 0) line += ' ';
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line += msg;
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}
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if (args) {
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if (line.length > 0) line += ' ';
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line += args
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.map((value) => {
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switch (typeof value) {
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case 'object':
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return Deno.inspect(value, { depth });
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case 'undefined':
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return 'undefined';
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default:
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return value;
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}
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})
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.join(' ');
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}
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return line;
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};
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};
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export const formatter = createFormatter();
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export const consoleFormatter = createFormatter();
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export const fileFormatter = createFormatter({ showTime: true, showLevel: true, showBrackets: false });
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