refactor(utils): add safeExtractMessageAndStackFromError util to remove code duplication

src/routes/api/export.ts

@@ -9,6 +9,7 @@ import log from "../../services/log.js";
 import NotFoundError from "../../errors/not_found_error.js";
 import type { Request, Response } from "express";
 import ValidationError from "../../errors/validation_error.js";
+import { safeExtractMessageAndStackFromError } from "../../services/utils.js";
 
 function exportBranch(req: Request, res: Response) {
     const { branchId, type, format, version, taskId } = req.params;
@@ -38,10 +39,11 @@ function exportBranch(req: Request, res: Response) {
             throw new NotFoundError(`Unrecognized export format '${format}'`);
         }
     } catch (e: unknown) {
-        const message = `Export failed with following error: '${(e instanceof Error) ? e.message : e}'. More details might be in the logs.`;
+        const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
+        const message = `Export failed with following error: '${errMessage}'. More details might be in the logs.`;
         taskContext.reportError(message);
 
-        log.error((e instanceof Error) ? message + e.stack : message);
+        log.error(errMessage + errStack);
 
         res.setHeader("Content-Type", "text/plain").status(500).send(message);
     }

src/routes/api/import.ts

@@ -13,6 +13,7 @@ import TaskContext from "../../services/task_context.js";
 import ValidationError from "../../errors/validation_error.js";
 import type { Request } from "express";
 import type BNote from "../../becca/entities/bnote.js";
+import { safeExtractMessageAndStackFromError } from "../../services/utils.js";
 
 async function importNotesToBranch(req: Request) {
     const { parentNoteId } = req.params;
@@ -69,7 +70,7 @@ async function importNotesToBranch(req: Request) {
             note = await singleImportService.importSingleFile(taskContext, file, parentNote);
         }
     } catch (e: unknown) {
-        const [errMessage, errStack] = e instanceof Error ? [e.message, e.stack] : ["Unknown Error", undefined];
+        const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
         const message = `Import failed with following error: '${errMessage}'. More details might be in the logs.`;
         taskContext.reportError(message);
 
@@ -122,7 +123,7 @@ async function importAttachmentsToNote(req: Request) {
     try {
         await singleImportService.importAttachment(taskContext, file, parentNote);
     } catch (e: unknown) {
-        const [errMessage, errStack] = e instanceof Error ? [e.message, e.stack] : ["Unknown Error", undefined];
+        const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
 
         const message = `Import failed with following error: '${errMessage}'. More details might be in the logs.`;
         taskContext.reportError(message);

src/routes/api/script.ts

@@ -6,6 +6,7 @@ import becca from "../../becca/becca.js";
 import syncService from "../../services/sync.js";
 import sql from "../../services/sql.js";
 import type { Request } from "express";
+import { safeExtractMessageAndStackFromError } from "../../services/utils.js";
 
 interface ScriptBody {
     script: string;
@@ -34,9 +35,10 @@ async function exec(req: Request) {
             maxEntityChangeId: syncService.getMaxEntityChangeId()
         };
     } catch (e: unknown) {
+        const [errMessage] = safeExtractMessageAndStackFromError(e);
         return {
             success: false,
-            error: (e instanceof Error) ? e.message : "Unknown Error"
+            error: errMessage
         };
     }
 }

src/routes/api/sql.ts

@@ -4,6 +4,7 @@ import sql from "../../services/sql.js";
 import becca from "../../becca/becca.js";
 import type { Request } from "express";
 import ValidationError from "../../errors/validation_error.js";
+import { safeExtractMessageAndStackFromError } from "../../services/utils.js";
 
 function getSchema() {
     const tableNames = sql.getColumn(`SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%' ORDER BY name`);
@@ -57,9 +58,10 @@ function execute(req: Request) {
             results
         };
     } catch (e: unknown) {
+        const [errMessage] = safeExtractMessageAndStackFromError(e);
         return {
             success: false,
-            error: (e instanceof Error) ? e.message : "Unknown Error"
+            error: errMessage
         };
     }
 }

src/routes/api/sync.ts

@@ -9,7 +9,7 @@ import optionService from "../../services/options.js";
 import contentHashService from "../../services/content_hash.js";
 import log from "../../services/log.js";
 import syncOptions from "../../services/sync_options.js";
-import utils from "../../services/utils.js";
+import utils, { safeExtractMessageAndStackFromError } from "../../services/utils.js";
 import ws from "../../services/ws.js";
 import type { Request } from "express";
 import type { EntityChange } from "../../services/entity_changes_interface.js";
@@ -31,9 +31,10 @@ async function testSync() {
 
         return { success: true, message: t("test_sync.successful") };
     } catch (e: unknown) {
+        const [errMessage] = safeExtractMessageAndStackFromError(e);
         return {
             success: false,
-            error: (e instanceof Error) ? e.message : "Unknown Error"
+            error: errMessage
         };
     }
 }

src/routes/custom.ts

@@ -5,6 +5,7 @@ import cls from "../services/cls.js";
 import sql from "../services/sql.js";
 import becca from "../becca/becca.js";
 import type { Request, Response, Router } from "express";
+import { safeExtractMessageAndStackFromError } from "../services/utils.js";
 
 function handleRequest(req: Request, res: Response) {
     // express puts content after first slash into 0 index element
@@ -26,7 +27,7 @@ function handleRequest(req: Request, res: Response) {
         try {
             match = path.match(regex);
         } catch (e: unknown) {
-            const [errMessage, errStack] = e instanceof Error ? [e.message, e.stack] : ["Unknown Error", undefined];
+            const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
             log.error(`Testing path for label '${attr.attributeId}', regex '${attr.value}' failed with error: ${errMessage}, stack: ${errStack}`);
             continue;
         }
@@ -47,10 +48,8 @@ function handleRequest(req: Request, res: Response) {
                     res
                 });
             } catch (e: unknown) {
-                const [errMessage, errStack] = e instanceof Error ? [e.message, e.stack] : ["Unknown Error", undefined];
-
+                const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
                 log.error(`Custom handler '${note.noteId}' failed with: ${errMessage}, ${errStack}`);
-
                 res.setHeader("Content-Type", "text/plain").status(500).send(errMessage);
             }
         } else if (attr.name === "customResourceProvider") {

src/routes/routes.ts

@@ -1,6 +1,6 @@
 "use strict";
 
-import { isElectron } from "../services/utils.js";
+import { isElectron, safeExtractMessageAndStackFromError } from "../services/utils.js";
 import multer from "multer";
 import log from "../services/log.js";
 import express from "express";
@@ -494,10 +494,7 @@ function handleResponse(resultHandler: ApiResultHandler, req: express.Request, r
 }
 
 function handleException(e: unknown | Error, method: HttpMethod, path: string, res: express.Response) {
-
-    const [errMessage, errStack]: [message: string, stack: string] = (e instanceof Error)
-        ? [e.message, e.stack || "No Stack Trace"]
-        : ["Unknown Error", "No Stack Trace"];
+    const [errMessage, errStack] = safeExtractMessageAndStackFromError(e);
 
     log.error(`${method} ${path} threw exception: '${errMessage}', stack: ${errStack}`);
 

src/services/utils.spec.ts

@@ -500,6 +500,23 @@ describe("#isDev", () => {
     });
 });
 
+describe("#safeExtractMessageAndStackFromError", () => {
+    it("should correctly extract the message and stack property if it gets passed an instance of an Error", () => {
+        const testMessage = "Test Message";
+        const testError = new Error(testMessage);
+        const actual = utils.safeExtractMessageAndStackFromError(testError);
+        expect(actual[0]).toBe(testMessage);
+        expect(actual[1]).not.toBeUndefined();
+    });
+
+    it("should use the fallback 'Unknown Error' message, if it gets passed anything else than an instance of an Error", () => {
+        const testNonError = "this is not an instance of an Error, but JS technically allows us to throw this anyways";
+        const actual = utils.safeExtractMessageAndStackFromError(testNonError);
+        expect(actual[0]).toBe("Unknown Error");
+        expect(actual[1]).toBeUndefined();
+    });
+})
+
 describe("#formatDownloadTitle", () => {
     //prettier-ignore
     const testCases: [fnValue: Parameters<typeof utils.formatDownloadTitle>, expectedValue: ReturnType<typeof utils.formatDownloadTitle>][] = [

src/services/utils.ts

@@ -363,6 +363,11 @@ export function processStringOrBuffer(data: string | Buffer | null) {
     }
 }
 
+export function safeExtractMessageAndStackFromError(err: unknown) {
+    return (err instanceof Error) ? [err.message, err.stack] as const : ["Unknown Error", undefined] as const;
+}
+
+
 export default {
     compareVersions,
     crash,
@@ -393,6 +398,7 @@ export default {
     removeDiacritic,
     removeTextFileExtension,
     replaceAll,
+    safeExtractMessageAndStackFromError,
     sanitizeSqlIdentifier,
     stripTags,
     timeLimit,