elastic
diff --git a/‎x-pack/platform/plugins/shared/cases/server/cases_analytics/activity_index/constants.ts‎
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diff --git a/‎x-pack/platform/plugins/shared/cases/server/cases_analytics/activity_index/index.ts‎
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diff --git a/‎x-pack/platform/plugins/shared/cases/server/cases_analytics/activity_index/mappings.ts‎
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diff --git a/‎x-pack/platform/plugins/shared/cases/server/cases_analytics/activity_index/painless_scripts.ts‎
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+/*
+ * 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 type { QueryDslQueryContainer } from '@elastic/elasticsearch/lib/api/types';
+
+import { ALERTING_CASES_SAVED_OBJECT_INDEX } from '@kbn/core-saved-objects-server';
+
+export const CAI_ACTIVITY_INDEX_NAME = '.internal.cases-activity';
+
+export const CAI_ACTIVITY_INDEX_ALIAS = '.cases-activity';
+
+export const CAI_ACTIVITY_INDEX_VERSION = 1;
+
+export const CAI_ACTIVITY_SOURCE_QUERY: QueryDslQueryContainer = {
+  bool: {
+    must: [
+      {
+        term: {
+          type: 'cases-user-actions',
+        },
+      },
+      {
+        bool: {
+          should: [
+            {
+              term: {
+                'cases-user-actions.type': 'severity',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'delete_case',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'category',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'status',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'tags',
+              },
+            },
+          ],
+          minimum_should_match: 1,
+        },
+      },
+    ],
+  },
+};
+
+export const CAI_ACTIVITY_SOURCE_INDEX = ALERTING_CASES_SAVED_OBJECT_INDEX;
+
+export const CAI_ACTIVITY_BACKFILL_TASK_ID = 'cai_activity_backfill_task';
+
+export const CAI_ACTIVITY_SYNCHRONIZATION_TASK_ID = 'cai_cases_activity_synchronization_task';
+
+export const getActivitySynchronizationSourceQuery = (
+  lastSyncAt: Date
+): QueryDslQueryContainer => ({
+  bool: {
+    must: [
+      {
+        term: {
+          type: 'cases-user-actions',
+        },
+      },
+      {
+        range: {
+          'cases-user-actions.created_at': {
+            gte: lastSyncAt.toISOString(),
+          },
+        },
+      },
+      {
+        bool: {
+          should: [
+            {
+              term: {
+                'cases-user-actions.type': 'severity',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'delete_case',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'category',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'status',
+              },
+            },
+            {
+              term: {
+                'cases-user-actions.type': 'tags',
+              },
+            },
+          ],
+          minimum_should_match: 1,
+        },
+      },
+    ],
+  },
+});
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+/*
+ * 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 type { ElasticsearchClient, Logger } from '@kbn/core/server';
+import type { TaskManagerStartContract } from '@kbn/task-manager-plugin/server';
+import { AnalyticsIndex } from '../analytics_index';
+import {
+  CAI_ACTIVITY_INDEX_NAME,
+  CAI_ACTIVITY_INDEX_ALIAS,
+  CAI_ACTIVITY_INDEX_VERSION,
+  CAI_ACTIVITY_SOURCE_INDEX,
+  CAI_ACTIVITY_SOURCE_QUERY,
+  CAI_ACTIVITY_BACKFILL_TASK_ID,
+  CAI_ACTIVITY_SYNCHRONIZATION_TASK_ID,
+} from './constants';
+import { CAI_ACTIVITY_INDEX_MAPPINGS } from './mappings';
+import { CAI_ACTIVITY_INDEX_SCRIPT, CAI_ACTIVITY_INDEX_SCRIPT_ID } from './painless_scripts';
+import { scheduleCAISynchronizationTask } from '../tasks/synchronization_task';
+
+export const createActivityAnalyticsIndex = ({
+  esClient,
+  logger,
+  isServerless,
+  taskManager,
+}: {
+  esClient: ElasticsearchClient;
+  logger: Logger;
+  isServerless: boolean;
+  taskManager: TaskManagerStartContract;
+}): AnalyticsIndex =>
+  new AnalyticsIndex({
+    logger,
+    esClient,
+    isServerless,
+    taskManager,
+    indexName: CAI_ACTIVITY_INDEX_NAME,
+    indexAlias: CAI_ACTIVITY_INDEX_ALIAS,
+    indexVersion: CAI_ACTIVITY_INDEX_VERSION,
+    mappings: CAI_ACTIVITY_INDEX_MAPPINGS,
+    painlessScriptId: CAI_ACTIVITY_INDEX_SCRIPT_ID,
+    painlessScript: CAI_ACTIVITY_INDEX_SCRIPT,
+    taskId: CAI_ACTIVITY_BACKFILL_TASK_ID,
+    sourceIndex: CAI_ACTIVITY_SOURCE_INDEX,
+    sourceQuery: CAI_ACTIVITY_SOURCE_QUERY,
+  });
+
+export const scheduleActivityAnalyticsSyncTask = ({
+  taskManager,
+  logger,
+}: {
+  taskManager: TaskManagerStartContract;
+  logger: Logger;
+}) => {
+  scheduleCAISynchronizationTask({
+    taskId: CAI_ACTIVITY_SYNCHRONIZATION_TASK_ID,
+    sourceIndex: CAI_ACTIVITY_SOURCE_INDEX,
+    destIndex: CAI_ACTIVITY_INDEX_NAME,
+    taskManager,
+    logger,
+  }).catch((e) => {
+    logger.error(
+      `Error scheduling ${CAI_ACTIVITY_SYNCHRONIZATION_TASK_ID} task, received ${e.message}`
+    );
+  });
+};
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+/*
+ * 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 type { MappingTypeMapping } from '@elastic/elasticsearch/lib/api/types';
+
+export const CAI_ACTIVITY_INDEX_MAPPINGS: MappingTypeMapping = {
+  dynamic: false,
+  properties: {
+    '@timestamp': {
+      type: 'date',
+    },
+    case_id: {
+      type: 'keyword',
+    },
+    action: {
+      type: 'keyword',
+    },
+    type: {
+      type: 'keyword',
+    },
+    payload: {
+      properties: {
+        status: {
+          type: 'keyword',
+        },
+        tags: {
+          type: 'keyword',
+        },
+        category: {
+          type: 'keyword',
+        },
+        severity: {
+          type: 'keyword',
+        },
+      },
+    },
+    created_at: {
+      type: 'date',
+    },
+    created_at_ms: {
+      type: 'long',
+    },
+    created_by: {
+      properties: {
+        username: {
+          type: 'keyword',
+        },
+        profile_uid: {
+          type: 'keyword',
+        },
+        full_name: {
+          type: 'keyword',
+        },
+        email: {
+          type: 'keyword',
+        },
+      },
+    },
+    owner: {
+      type: 'keyword',
+    },
+    space_ids: {
+      type: 'keyword',
+    },
+  },
+};
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+/*
+ * 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 type { StoredScript } from '@elastic/elasticsearch/lib/api/types';
+import { CAI_ACTIVITY_INDEX_VERSION } from './constants';
+
+export const CAI_ACTIVITY_INDEX_SCRIPT_ID = `cai_activity_script_${CAI_ACTIVITY_INDEX_VERSION}`;
+export const CAI_ACTIVITY_INDEX_SCRIPT: StoredScript = {
+  lang: 'painless',
+  source: `
+    def source = [:];
+    source.putAll(ctx._source);
+    ctx._source.clear();
+
+    ctx._source.action = source["cases-user-actions"].action;
+    ctx._source.type = source["cases-user-actions"].type;
+
+    long milliSinceEpoch = new Date().getTime();
+    Instant instant = Instant.ofEpochMilli(milliSinceEpoch);
+    ctx._source['@timestamp'] = ZonedDateTime.ofInstant(instant, ZoneId.of('Z'));
+
+    ZonedDateTime zdt_created =
+      ZonedDateTime.parse(source["cases-user-actions"].created_at);
+    ctx._source.created_at_ms = zdt_created.toInstant().toEpochMilli();
+    ctx._source.created_at = source["cases-user-actions"].created_at;
+
+    if (source["cases-user-actions"].created_by != null) {
+        ctx._source.created_by = new HashMap();
+        ctx._source.created_by.full_name = source["cases-user-actions"].created_by.full_name;
+        ctx._source.created_by.username = source["cases-user-actions"].created_by.username;
+        ctx._source.created_by.profile_uid = source["cases-user-actions"].created_by.profile_uid;
+        ctx._source.created_by.email = source["cases-user-actions"].created_by.email;
+    }
+
+    if (source["cases-user-actions"].payload != null) {
+      ctx._source.payload = new HashMap();
+
+      if (source["cases-user-actions"].type == "severity" && source["cases-user-actions"].payload.severity != null) {
+        ctx._source.payload.severity = source["cases-user-actions"].payload.severity;
+      }
+
+      if (source["cases-user-actions"].type == "category" && source["cases-user-actions"].payload.category != null) {
+        ctx._source.payload.category = source["cases-user-actions"].payload.category;
+      }
+
+      if (source["cases-user-actions"].type == "status" && source["cases-user-actions"].payload.status != null) {
+        ctx._source.payload.status = source["cases-user-actions"].payload.status;
+      }
+
+      if (source["cases-user-actions"].type == "tags" && source["cases-user-actions"].payload.tags != null) {
+        ctx._source.payload.tags = source["cases-user-actions"].payload.tags;
+      }
+    }
+
+    if (source.references != null) {
+      for (item in source.references) {
+        if (item.type == "cases") {
+          ctx._source.case_id = item.id;
+        }
+      }
+    }
+
+    ctx._source.owner = source["cases-user-actions"].owner;
+    ctx._source.space_ids = source.namespaces;
+  `,
+};