fix: add max breadcrumbs limitation (#28)

* feat: add max breadcrumbs limitation

* feat: add breadcrumbs limitation to setBreadcrumbs method

libs/browser/src/lib/consts/max-breadcrumbs.ts

@@ -0,0 +1 @@
+export const MAX_BREADCRUMBS = 100;

libs/browser/src/lib/models/browser-sentry-client-options.ts

@@ -12,4 +12,5 @@ export interface BrowserSentryClientOptions extends SentryClientOptions {
   ignoreErrors?: Array<string | RegExp>;
   blacklistUrls?: Array<string | RegExp>;
   release?: string;
+  maxBreadcrumbs?: number;
 }

libs/browser/src/lib/services/browser-micro-sentry-client.spec.ts

@@ -1,13 +1,22 @@
 import { BrowserMicroSentryClient } from './browser-micro-sentry-client';
 import { Severity } from '@micro-sentry/core';
+import { MAX_BREADCRUMBS } from '../consts/max-breadcrumbs';
 
 describe('BrowserMicroSentryClient', () => {
   let client: BrowserMicroSentryClient;
+  const maxBreadcrumbs = 10;
+  const getBreadcrumbs = (amount: number) =>
+    [...Array(amount).keys()].map((index) => ({
+      event_id: `id${index}`,
+      type: 'console',
+      level: Severity.critical,
+    }));
 
   beforeAll(() => {
     client = new BrowserMicroSentryClient({
       dsn: 'http://secret@exampl.dsn/2',
       release: '1.0.0',
+      maxBreadcrumbs,
     });
   });
 
@@ -205,6 +214,97 @@ describe('BrowserMicroSentryClient', () => {
       });
     });
 
+    it('should limit breadcrumbs amount - with custom limit; incremental addition', () => {
+      getBreadcrumbs(maxBreadcrumbs + 2).forEach((bc) =>
+        client.addBreadcrumb(bc)
+      );
+
+      expect(client.state.breadcrumbs?.length).toBe(maxBreadcrumbs);
+    });
+
+    it('should limit breadcrumbs amount - with custom limit; all at once', () => {
+      client.setBreadcrumbs(getBreadcrumbs(maxBreadcrumbs + 2));
+
+      expect(client.state.breadcrumbs?.length).toBe(maxBreadcrumbs);
+    });
+
+    it('should limit breadcrumbs amount - with default limit; incremental addition', () => {
+      const anotherClient = new BrowserMicroSentryClient({});
+
+      getBreadcrumbs(MAX_BREADCRUMBS + 2).forEach((bc) =>
+        anotherClient.addBreadcrumb(bc)
+      );
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(MAX_BREADCRUMBS);
+    });
+
+    it('should limit breadcrumbs amount - with default limit; all at once', () => {
+      const anotherClient = new BrowserMicroSentryClient({});
+      anotherClient.setBreadcrumbs(getBreadcrumbs(MAX_BREADCRUMBS + 2));
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(MAX_BREADCRUMBS);
+    });
+
+    it('should save only last breadcrumbs; incremental addition', () => {
+      getBreadcrumbs(maxBreadcrumbs + 2).forEach((bc) =>
+        client.addBreadcrumb(bc)
+      );
+
+      expect(
+        (client.state.breadcrumbs ?? [])
+          .map((breadcrumb) => breadcrumb.event_id)
+          .join(',')
+      ).toEqual('id2,id3,id4,id5,id6,id7,id8,id9,id10,id11');
+    });
+
+    it('should save only last breadcrumbs; all at once', () => {
+      client.setBreadcrumbs(getBreadcrumbs(maxBreadcrumbs + 2));
+
+      expect(
+        (client.state.breadcrumbs ?? [])
+          .map((breadcrumb) => breadcrumb.event_id)
+          .join(',')
+      ).toEqual('id2,id3,id4,id5,id6,id7,id8,id9,id10,id11');
+    });
+
+    it('should not add breadcrumbs at all if maxBreadcrumbs is set to 0; incremental addition', () => {
+      const anotherClient = new BrowserMicroSentryClient({ maxBreadcrumbs: 0 });
+
+      getBreadcrumbs(1).forEach((bc) => anotherClient.addBreadcrumb(bc));
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(0);
+    });
+
+    it('should not add breadcrumbs at all if maxBreadcrumbs is set to 0; all at once', () => {
+      const anotherClient = new BrowserMicroSentryClient({ maxBreadcrumbs: 0 });
+
+      anotherClient.setBreadcrumbs(getBreadcrumbs(1));
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(0);
+    });
+
+    it('should ignore maxBreadcrumbs option if maxBreadcrumbs is a negative number; incremental addition', () => {
+      const anotherClient = new BrowserMicroSentryClient({
+        maxBreadcrumbs: -100,
+      });
+
+      getBreadcrumbs(MAX_BREADCRUMBS + 2).forEach((bc) =>
+        anotherClient.addBreadcrumb(bc)
+      );
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(MAX_BREADCRUMBS);
+    });
+
+    it('should ignore maxBreadcrumbs option if maxBreadcrumbs is a negative number; all at once', () => {
+      const anotherClient = new BrowserMicroSentryClient({
+        maxBreadcrumbs: -100,
+      });
+
+      anotherClient.setBreadcrumbs(getBreadcrumbs(MAX_BREADCRUMBS + 2));
+
+      expect(anotherClient.state.breadcrumbs?.length).toBe(MAX_BREADCRUMBS);
+    });
+
     it('should skip breadcrumbs if beforeBreadcrumb returns null', () => {
       client = new BrowserMicroSentryClient({
         dsn: 'http://secret@exampl.dsn/2',
@@ -237,7 +337,7 @@ describe('BrowserMicroSentryClient', () => {
       ]);
     });
 
-    afterAll(() => {
+    afterEach(() => {
       client.clearState();
     });
   });

libs/browser/src/lib/services/browser-micro-sentry-client.ts

@@ -12,12 +12,14 @@ import { State } from '../models/state';
 import { MicroSentryPlugin } from '../models/plugin';
 import { BrowserSentryClientOptions } from '../models/browser-sentry-client-options';
 import { isMatchingPattern } from '../utils/is-matching-pattern';
+import { MAX_BREADCRUMBS } from '../consts/max-breadcrumbs';
 
 function getWindow(): Window {
   return window;
 }
 
 export class BrowserMicroSentryClient extends MicroSentryClient {
+  private readonly breadcrumbsKeyName = 'breadcrumbs';
   private destroyed = false;
   private readonly plugins: MicroSentryPlugin[];
   private readonly beforeSend: NonNullable<
@@ -33,6 +35,7 @@ export class BrowserMicroSentryClient extends MicroSentryClient {
     BrowserSentryClientOptions['ignoreErrors']
   >;
   private readonly release?: string;
+  private readonly maxBreadcrumbs: number;
 
   constructor(
     private options: BrowserSentryClientOptions,
@@ -47,14 +50,17 @@ export class BrowserMicroSentryClient extends MicroSentryClient {
       blacklistUrls = [],
       ignoreErrors = [],
       release = undefined,
-    } = this.options || {};
+      maxBreadcrumbs = MAX_BREADCRUMBS,
+    } = this.options || {} || [];
 
     this.plugins = plugins.map((Plugin) => new Plugin(this));
     this.beforeSend = beforeSend;
     this.beforeBreadcrumb = beforeBreadcrumb;
     this.blacklistUrls = blacklistUrls;
     this.ignoreErrors = ignoreErrors;
     this.release = release;
+    this.maxBreadcrumbs =
+      maxBreadcrumbs >= 0 ? maxBreadcrumbs : MAX_BREADCRUMBS;
   }
 
   protected _state: State = {};
@@ -126,17 +132,20 @@ export class BrowserMicroSentryClient extends MicroSentryClient {
     }
 
     this.extendState({
-      breadcrumbs: [
+      [this.breadcrumbsKeyName]: [
         {
           timestamp: Date.now() / 1_000,
           ...result,
         },
       ],
     });
+
+    this.trimBreadcrumbs();
   }
 
   setBreadcrumbs(breadcrumbs: Breadcrumb[] | undefined) {
-    this.setKeyState('breadcrumbs', breadcrumbs);
+    this.setKeyState(this.breadcrumbsKeyName, breadcrumbs);
+    this.trimBreadcrumbs();
   }
 
   captureMessage(message: string, level?: Severity) {
@@ -307,4 +316,18 @@ export class BrowserMicroSentryClient extends MicroSentryClient {
   private setKeyState<T extends keyof State>(key: T, value: State[T]) {
     this._state[key] = value;
   }
+
+  private getKeyState<T extends keyof State>(key: T): State[T] {
+    return this._state[key];
+  }
+
+  private trimBreadcrumbs(): void {
+    const breadcrumbs = this.getKeyState(this.breadcrumbsKeyName);
+    if (breadcrumbs && (breadcrumbs.length ?? 0) > this.maxBreadcrumbs) {
+      this.setKeyState(
+        this.breadcrumbsKeyName,
+        this.maxBreadcrumbs > 0 ? breadcrumbs.slice(-this.maxBreadcrumbs) : []
+      );
+    }
+  }
 }