slack

Slack Log Handler for Debugr

This log handler will send each entry with a log level at or above a configured threshold as a message to a configured Slack channel.

Installation

npm install --save @debugr/slack

Usage

import { Logger, LogLevel } from '@debugr/core';
import { SlackHandler } from '@debugr/slack';

const globalContext = {
  applicationName: 'example',
};

const logger = new Logger(globalContext, [
  new SlackHandler({
    threshold: LogLevel.FATAL,
    webhookUrl: 'your slack webhook url',
  }),
]);

logger.fatal('Something failed miserably!');

The SlackHandler constructor accepts a required options object with the following keys as the first argument:

Option	Type	Default	Description
webhookUrl	string	(required)	A Slack webhook URL; see the Slack API docs on how to obtain one.
threshold	LogLevel	LogLevel.ERROR	The lowest level of entries which will be posted to the configured channel. Any entries below this level will be ignored.
channel	string		The Slack channel ID the message should be posted to. This only works with legacy Slack webhooks.
username	string		The slack username the message should be posted under. This only works with legacy Slack webhooks.
iconUrl	string		The URL of an icon to be used in place of the default icon. This only works with legacy Slack webhooks.
iconEmoji	string		An emoji code string to use in place of the default icon. This only works with legacy Slack webhooks.
errorCallback	(err: Error) => void	(see description)	A callback which will be called when sending a message to Slack fails. The default callback will simply log the error into the console.
bodyMapper	(entry: LogEntry) => Record<string, any>	(see description)	A callback mapping the log entry to payload to be sent to the configured webhook URL. At a minimum the payload must include a text key with a string content.