[Security Solutions] Adds back the legacy actions and notification system in a limited fashion

.eslintrc.js

@@ -930,6 +930,15 @@ module.exports = {
         '@typescript-eslint/no-explicit-any': 'error',
         '@typescript-eslint/no-useless-constructor': 'error',
         '@typescript-eslint/unified-signatures': 'error',
+        'no-restricted-imports': [
+          'error',
+          {
+            // prevents code from importing files that contain the name "legacy" within their name. This is a mechanism
+            // to help deprecation and prevent accidental re-use/continued use of code we plan on removing. If you are
+            // finding yourself turning this off a lot for "new code" consider renaming the file and functions if it is has valid uses.
+            patterns: ['*legacy*'],
+          },
+        ],
       },
     },
     {
@@ -1192,6 +1201,15 @@ module.exports = {
         'no-template-curly-in-string': 'error',
         'sort-keys': 'error',
         'prefer-destructuring': 'error',
+        'no-restricted-imports': [
+          'error',
+          {
+            // prevents code from importing files that contain the name "legacy" within their name. This is a mechanism
+            // to help deprecation and prevent accidental re-use/continued use of code we plan on removing. If you are
+            // finding yourself turning this off a lot for "new code" consider renaming the file and functions if it has valid uses.
+            patterns: ['*legacy*'],
+          },
+        ],
       },
     },
     /**
@@ -1304,6 +1322,15 @@ module.exports = {
         'no-template-curly-in-string': 'error',
         'sort-keys': 'error',
         'prefer-destructuring': 'error',
+        'no-restricted-imports': [
+          'error',
+          {
+            // prevents code from importing files that contain the name "legacy" within their name. This is a mechanism
+            // to help deprecation and prevent accidental re-use/continued use of code we plan on removing. If you are
+            // finding yourself turning this off a lot for "new code" consider renaming the file and functions if it has valid uses.
+            patterns: ['*legacy*'],
+          },
+        ],
       },
     },
     /**

x-pack/plugins/security_solution/common/constants.ts

@@ -201,8 +201,9 @@ export const THRESHOLD_RULE_TYPE_ID = `${RULE_TYPE_PREFIX}.thresholdRule` as con
 
 /**
  * Id for the notifications alerting type
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
  */
-export const NOTIFICATIONS_ID = `siem.notifications`;
+export const LEGACY_NOTIFICATIONS_ID = `siem.notifications`;
 
 /**
  * Special internal structure for tags for signals. This is used

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_add_tags.test.ts

@@ -0,0 +1,28 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+// eslint-disable-next-line no-restricted-imports
+import { legacyAddTags } from './legacy_add_tags';
+import { INTERNAL_RULE_ALERT_ID_KEY } from '../../../../common/constants';
+
+describe('legacyAdd_tags', () => {
+  test('it should add a rule id as an internal structure', () => {
+    const tags = legacyAddTags([], 'rule-1');
+    expect(tags).toEqual([`${INTERNAL_RULE_ALERT_ID_KEY}:rule-1`]);
+  });
+
+  test('it should not allow duplicate tags to be created', () => {
+    const tags = legacyAddTags(['tag-1', 'tag-1'], 'rule-1');
+    expect(tags).toEqual(['tag-1', `${INTERNAL_RULE_ALERT_ID_KEY}:rule-1`]);
+  });
+
+  test('it should not allow duplicate internal tags to be created when called two times in a row', () => {
+    const tags1 = legacyAddTags(['tag-1'], 'rule-1');
+    const tags2 = legacyAddTags(tags1, 'rule-1');
+    expect(tags2).toEqual(['tag-1', `${INTERNAL_RULE_ALERT_ID_KEY}:rule-1`]);
+  });
+});

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_add_tags.ts

@@ -0,0 +1,14 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { INTERNAL_RULE_ALERT_ID_KEY } from '../../../../common/constants';
+
+/**
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
+ */
+export const legacyAddTags = (tags: string[], ruleAlertId: string): string[] =>
+  Array.from(new Set([...tags, `${INTERNAL_RULE_ALERT_ID_KEY}:${ruleAlertId}`]));

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_create_notifications.test.ts

@@ -0,0 +1,76 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { rulesClientMock } from '../../../../../alerting/server/mocks';
+// eslint-disable-next-line no-restricted-imports
+import { legacyCreateNotifications } from './legacy_create_notifications';
+
+/**
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
+ */
+describe('legacyCreateNotifications', () => {
+  let rulesClient: ReturnType<typeof rulesClientMock.create>;
+
+  beforeEach(() => {
+    rulesClient = rulesClientMock.create();
+  });
+
+  it('calls the rulesClient with proper params', async () => {
+    const ruleAlertId = 'rule-04128c15-0d1b-4716-a4c5-46997ac7f3bd';
+
+    await legacyCreateNotifications({
+      rulesClient,
+      actions: [],
+      ruleAlertId,
+      enabled: true,
+      interval: '',
+      name: '',
+    });
+
+    expect(rulesClient.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          params: expect.objectContaining({
+            ruleAlertId,
+          }),
+        }),
+      })
+    );
+  });
+
+  it('calls the rulesClient with transformed actions', async () => {
+    const action = {
+      group: 'default',
+      id: '99403909-ca9b-49ba-9d7a-7e5320e68d05',
+      params: { message: 'Rule generated {{state.signals_count}} signals' },
+      actionTypeId: '.slack',
+    };
+    await legacyCreateNotifications({
+      rulesClient,
+      actions: [action],
+      ruleAlertId: 'new-rule-id',
+      enabled: true,
+      interval: '',
+      name: '',
+    });
+
+    expect(rulesClient.create).toHaveBeenCalledWith(
+      expect.objectContaining({
+        data: expect.objectContaining({
+          actions: expect.arrayContaining([
+            {
+              group: action.group,
+              id: action.id,
+              params: action.params,
+              actionTypeId: '.slack',
+            },
+          ]),
+        }),
+      })
+    );
+  });
+});

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_create_notifications.ts

@@ -0,0 +1,41 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { SanitizedAlert } from '../../../../../alerting/common';
+import { SERVER_APP_ID, LEGACY_NOTIFICATIONS_ID } from '../../../../common/constants';
+// eslint-disable-next-line no-restricted-imports
+import { CreateNotificationParams, LegacyRuleNotificationAlertTypeParams } from './legacy_types';
+// eslint-disable-next-line no-restricted-imports
+import { legacyAddTags } from './legacy_add_tags';
+
+/**
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
+ */
+export const legacyCreateNotifications = async ({
+  rulesClient,
+  actions,
+  enabled,
+  ruleAlertId,
+  interval,
+  name,
+}: CreateNotificationParams): Promise<SanitizedAlert<LegacyRuleNotificationAlertTypeParams>> =>
+  rulesClient.create<LegacyRuleNotificationAlertTypeParams>({
+    data: {
+      name,
+      tags: legacyAddTags([], ruleAlertId),
+      alertTypeId: LEGACY_NOTIFICATIONS_ID,
+      consumer: SERVER_APP_ID,
+      params: {
+        ruleAlertId,
+      },
+      schedule: { interval },
+      enabled,
+      actions,
+      throttle: null,
+      notifyWhen: null,
+    },
+  });

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_find_notifications.test.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+// eslint-disable-next-line no-restricted-imports
+import { legacyGetFilter } from './legacy_find_notifications';
+import { LEGACY_NOTIFICATIONS_ID } from '../../../../common/constants';
+
+describe('legacyFind_notifications', () => {
+  test('it returns a full filter with an AND if sent down', () => {
+    expect(legacyGetFilter('alert.attributes.enabled: true')).toEqual(
+      `alert.attributes.alertTypeId: ${LEGACY_NOTIFICATIONS_ID} AND alert.attributes.enabled: true`
+    );
+  });
+
+  test('it returns existing filter with no AND when not set', () => {
+    expect(legacyGetFilter(null)).toEqual(
+      `alert.attributes.alertTypeId: ${LEGACY_NOTIFICATIONS_ID}`
+    );
+  });
+});

x-pack/plugins/security_solution/server/lib/detection_engine/notifications/legacy_find_notifications.ts

@@ -0,0 +1,45 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { AlertTypeParams, FindResult } from '../../../../../alerting/server';
+import { LEGACY_NOTIFICATIONS_ID } from '../../../../common/constants';
+// eslint-disable-next-line no-restricted-imports
+import { LegacyFindNotificationParams } from './legacy_types';
+
+/**
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
+ */
+export const legacyGetFilter = (filter: string | null | undefined) => {
+  if (filter == null) {
+    return `alert.attributes.alertTypeId: ${LEGACY_NOTIFICATIONS_ID}`;
+  } else {
+    return `alert.attributes.alertTypeId: ${LEGACY_NOTIFICATIONS_ID} AND ${filter}`;
+  }
+};
+
+/**
+ * @deprecated Once legacy notifications/"side car actions" goes away this should be removed
+ */
+export const legacyFindNotifications = async ({
+  rulesClient,
+  perPage,
+  page,
+  fields,
+  filter,
+  sortField,
+  sortOrder,
+}: LegacyFindNotificationParams): Promise<FindResult<AlertTypeParams>> =>
+  rulesClient.find({
+    options: {
+      fields,
+      page,
+      perPage,
+      filter: legacyGetFilter(filter),
+      sortOrder,
+      sortField,
+    },
+  });