feat(core): init basic sentinel

packages/core/src/sentinel/basic-sentinel.test.ts

@@ -0,0 +1,100 @@
+import {
+  type ActivityReport,
+  SentinelActionResult,
+  SentinelActivityAction,
+  SentinelActivityTargetType,
+  SentinelDecision,
+} from '@logto/schemas';
+
+import { createMockCommonQueryMethods, expectSqlString } from '#src/test-utils/query.js';
+
+import BasicSentinel from './basic-sentinel.js';
+
+const { jest } = import.meta;
+
+const createMockActivityReport = (): ActivityReport => ({
+  targetType: SentinelActivityTargetType.User,
+  targetHash: 'baz',
+  action: SentinelActivityAction.Password,
+  actionResult: SentinelActionResult.Success,
+  payload: {},
+});
+
+class TestSentinel extends BasicSentinel {
+  override decide = super.decide;
+}
+
+const methods = createMockCommonQueryMethods();
+const sentinel = new TestSentinel(methods);
+
+afterEach(() => {
+  jest.clearAllMocks();
+});
+
+describe('BasicSentinel -> reportActivity()', () => {
+  it('should insert an activity', async () => {
+    methods.maybeOne.mockResolvedValueOnce(null);
+    methods.oneFirst.mockResolvedValueOnce(0);
+
+    const activity = createMockActivityReport();
+    const decision = await sentinel.reportActivity(activity);
+
+    expect(decision).toEqual(SentinelDecision.Allowed);
+    expect(methods.query).toHaveBeenCalledTimes(1);
+    expect(methods.query).toHaveBeenCalledWith(
+      expectSqlString('insert into "sentinel_activities"')
+    );
+  });
+
+  it('should insert a blocked activity', async () => {
+    // Mock the query method to return a blocked activity
+    methods.maybeOne.mockResolvedValueOnce({ id: 0 });
+
+    const activity = createMockActivityReport();
+    const decision = await sentinel.reportActivity(activity);
+    expect(decision).toEqual(SentinelDecision.Blocked);
+    expect(methods.query).toHaveBeenCalledTimes(1);
+    expect(methods.query).toHaveBeenCalledWith(
+      expectSqlString('insert into "sentinel_activities"')
+    );
+  });
+});
+
+describe('BasicSentinel -> decide()', () => {
+  it('should return blocked if the activity is blocked', async () => {
+    methods.maybeOne.mockResolvedValueOnce({ id: 0 });
+
+    const activity = createMockActivityReport();
+    const decision = await sentinel.decide(activity);
+    expect(decision).toEqual(SentinelDecision.Blocked);
+  });
+
+  it('should return allowed if the activity is not blocked and there are less than 5 failed attempts', async () => {
+    methods.maybeOne.mockResolvedValueOnce(null);
+    methods.oneFirst.mockResolvedValueOnce(4);
+
+    const activity = createMockActivityReport();
+    const decision = await sentinel.decide(activity);
+    expect(decision).toEqual(SentinelDecision.Allowed);
+  });
+
+  it('should return blocked if the activity is not blocked and there are 5 failed attempts', async () => {
+    methods.maybeOne.mockResolvedValueOnce(null);
+    methods.oneFirst.mockResolvedValueOnce(5);
+
+    const activity = createMockActivityReport();
+    const decision = await sentinel.decide(activity);
+    expect(decision).toEqual(SentinelDecision.Blocked);
+  });
+
+  it('should return blocked if the activity is not blocked and there are 4 failed attempts and the current activity is failed', async () => {
+    methods.maybeOne.mockResolvedValueOnce(null);
+    methods.oneFirst.mockResolvedValueOnce(4);
+
+    const activity = createMockActivityReport();
+    // eslint-disable-next-line @silverhand/fp/no-mutation
+    activity.actionResult = SentinelActionResult.Failed;
+    const decision = await sentinel.decide(activity);
+    expect(decision).toEqual(SentinelDecision.Blocked);
+  });
+});

packages/core/src/sentinel/basic-sentinel.ts

@@ -0,0 +1,130 @@
+import {
+  type ActivityReport,
+  Sentinel,
+  SentinelDecision,
+  type SentinelActivity,
+  SentinelActivities,
+  SentinelActionResult,
+  SentinelActivityAction,
+} from '@logto/schemas';
+import { convertToIdentifiers, generateStandardId } from '@logto/shared';
+import { cond } from '@silverhand/essentials';
+import { addMinutes } from 'date-fns';
+import { sql, type CommonQueryMethods } from 'slonik';
+
+import { buildInsertIntoWithPool } from '#src/database/insert-into.js';
+
+const { fields, table } = convertToIdentifiers(SentinelActivities);
+
+/**
+ * A basic sentinel that blocks a user after 5 failed attempts in 1 hour.
+ *
+ * @see {@link BasicSentinel.supportedActions} for the list of supported actions.
+ */
+export default class BasicSentinel extends Sentinel {
+  /** The list of actions that are accepted to be reported to this sentinel. */
+  static supportedActions = Object.freeze([
+    SentinelActivityAction.Password,
+    SentinelActivityAction.VerificationCode,
+  ] as const);
+
+  /** The array of all supported actions in SQL format. */
+  static supportedActionArray = sql.array(
+    BasicSentinel.supportedActions,
+    SentinelActivities.fields.action
+  );
+
+  /**
+   * Asserts that the given action is supported by this sentinel.
+   *
+   * @throws {Error} If the action is not supported.
+   */
+  static assertAction(action: unknown): asserts action is SentinelActivityAction {
+    // eslint-disable-next-line no-restricted-syntax
+    if (!BasicSentinel.supportedActions.includes(action as SentinelActivityAction)) {
+      // Update to use the new error class later.
+      throw new Error(`Unsupported action: ${String(action)}`);
+    }
+  }
+
+  protected insertActivity = buildInsertIntoWithPool(this.pool)(SentinelActivities);
+
+  constructor(protected readonly pool: CommonQueryMethods) {
+    super();
+  }
+
+  /**
+   * Reports an activity to this sentinel. The sentinel will decide whether to block the user or
+   * not.
+   *
+   * Regardless of the decision, the activity will be recorded in the database.
+   *
+   * @param activity The activity to report.
+   * @returns The decision made by the sentinel.
+   * @throws {Error} If the action is not supported.
+   * @see {@link BasicSentinel.supportedActions} for the list of supported actions.
+   */
+  async reportActivity(activity: ActivityReport): Promise<SentinelDecision> {
+    BasicSentinel.assertAction(activity.action);
+
+    const decision = await this.decide(activity);
+
+    await this.insertActivity({
+      id: generateStandardId(),
+      ...activity,
+      decision,
+      decisionExpiresAt: cond(
+        decision === SentinelDecision.Blocked && addMinutes(new Date(), 10).valueOf()
+      ),
+    });
+
+    return decision;
+  }
+
+  /**
+   * Checks whether the given target is blocked from performing actions.
+   *
+   * @remarks
+   * All supported actions share the same pool of activities, i.e. once a user has failed to
+   * perform any of the supported actions for certain times, the user will be blocked from
+   * performing any of the supported actions.
+   */
+  protected async isBlocked(
+    query: Pick<SentinelActivity, 'targetType' | 'targetHash'>
+  ): Promise<boolean> {
+    const blocked = await this.pool.maybeOne(sql`
+      select ${fields.id} from ${table}
+      where ${fields.targetType} = ${query.targetType}
+        and ${fields.targetHash} = ${query.targetHash}
+        and ${fields.action} = any(${BasicSentinel.supportedActionArray})
+        and ${fields.decision} = ${SentinelDecision.Blocked}
+        and ${fields.decisionExpiresAt} > now()
+      limit 1
+    `);
+    return Boolean(blocked);
+  }
+
+  protected async decide(
+    query: Pick<SentinelActivity, 'targetType' | 'targetHash' | 'actionResult'>
+  ): Promise<SentinelDecision> {
+    const blocked = await this.isBlocked(query);
+
+    if (blocked) {
+      return SentinelDecision.Blocked;
+    }
+
+    const failedAttempts = await this.pool.oneFirst<number>(sql`
+      select count(*) from ${table}
+      where ${fields.targetType} = ${query.targetType}
+        and ${fields.targetHash} = ${query.targetHash}
+        and ${fields.action} = any(${BasicSentinel.supportedActionArray})
+        and ${fields.actionResult} = ${SentinelActionResult.Failed}
+        and ${fields.decision} != ${SentinelDecision.Blocked}
+        and ${fields.createdAt} > now() - interval '1 hour'
+    `);
+
+    return failedAttempts + (query.actionResult === SentinelActionResult.Failed ? 1 : 0) >= 5
+      ? SentinelDecision.Blocked
+      : SentinelDecision.Allowed;
+  }
+}

packages/core/src/test-utils/query.ts

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+const { jest } = import.meta;
+
+export const createMockCommonQueryMethods = () => ({
+  any: jest.fn(),
+  anyFirst: jest.fn(),
+  exists: jest.fn(),
+  many: jest.fn(),
+  manyFirst: jest.fn(),
+  maybeOne: jest.fn(),
+  maybeOneFirst: jest.fn(),
+  one: jest.fn(),
+  oneFirst: jest.fn(),
+  query: jest.fn().mockResolvedValue({ rows: [] }),
+  transaction: jest.fn(),
+});
+
+export const expectSqlString = (sql: string): unknown =>
+  expect.objectContaining({
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
+    sql: expect.stringContaining(sql),
+  });