feat: bring back seq for the bot

bot/src/config.ts

@@ -106,6 +106,8 @@ export interface ProcessEnvironment {
 	nodeEnv: "dev" | "production" | "staging" | "test";
 	mongoUrl: string;
 	port: integer;
+	seqUrl?: string;
+	seqApiKey?: string;
 }
 
 function ParseEnvVars() {
@@ -123,6 +125,7 @@ function ParseEnvVars() {
 				p.isPositiveInteger(Number(self)) === true ||
 				"Should be a string representing a whole integer port.",
 			SEQ_URL: "*string",
+			SEQ_API_KEY: "*string",
 		},
 		{},
 		{ allowExcessKeys: true }
@@ -138,6 +141,8 @@ function ParseEnvVars() {
 		nodeEnv: process.env.NODE_ENV,
 		mongoUrl: process.env.MONGO_URL,
 		port: Number(process.env.PORT),
+		seqUrl: process.env.SEQ_URL,
+		seqApiKey: process.env.SEQ_API_KEY,
 	} as ProcessEnvironment;
 }
 

bot/src/utils/logger.ts

@@ -1,10 +1,44 @@
+import { Transport as SeqTransport } from "@valuabletouch/winston-seq";
+import { ProcessEnv } from "config";
 import { CreateLogger } from "mei-logger";
 import { transports } from "winston";
 import type { LoggerLayers } from "../data/data";
 import type { MeiLogger } from "mei-logger";
+import type { SeqLogLevel } from "seq-logging";
 
 const tports: Array<any> = [new transports.Console({})];
 
+if (ProcessEnv.seqUrl) {
+	// Turns winston log levels into seq format.
+	const levelMap: Record<string, SeqLogLevel> = {
+		crit: "Fatal",
+		severe: "Error",
+		error: "Error",
+		warn: "Warning",
+		info: "Information",
+
+		// Note that Seq interprets these in reverse,
+		// however, it's easier to read this code if I just
+		// use the same levels, instead of the right ones.
+		verbose: "Verbose",
+		debug: "Debug",
+	};
+
+	tports.push(
+		new SeqTransport({
+			apiKey: ProcessEnv.seqApiKey,
+			serverUrl: ProcessEnv.seqUrl,
+			onError: (err) => {
+				// eslint-disable-next-line no-console
+				console.error(`Failed to send seq message: ${err.message}.`);
+			},
+			levelMapper(level = "") {
+				return levelMap[level] ?? "Information";
+			},
+		})
+	);
+}
+
 const logger = CreateLogger(`tachi-bot`, undefined, tports);
 
 export default logger;