[ML] New Platform server shim: update indices routes

x-pack/legacy/plugins/ml/public/application/components/anomalies_table/links_menu.js

@@ -236,26 +236,26 @@ class LinksMenuUI extends Component {
     let i = 0;
     findFieldType(datafeedIndices[i]);
 
-    function findFieldType(index) {
-      getFieldTypeFromMapping(index, categorizationFieldName)
-        .then(resp => {
-          if (resp !== '') {
-            createAndOpenUrl(index, resp);
-          } else {
-            i++;
-            if (i < datafeedIndices.length) {
-              findFieldType(datafeedIndices[i]);
-            } else {
-              error();
-            }
-          }
+    const error = () => {
+      console.log(
+        `viewExamples(): error finding type of field ${categorizationFieldName} in indices:`,
+        datafeedIndices
+      );
+      const { toasts } = this.props.kibana.services.notifications;
+      toasts.addDanger(
+        i18n.translate('xpack.ml.anomaliesTable.linksMenu.noMappingCouldBeFoundErrorMessage', {
+          defaultMessage:
+            'Unable to view examples of documents with mlcategory {categoryId} ' +
+            'as no mapping could be found for the categorization field {categorizationFieldName}',
+          values: {
+            categoryId,
+            categorizationFieldName,
+          },
         })
-        .catch(() => {
-          error();
-        });
-    }
+      );
+    };
 
-    function createAndOpenUrl(index, categorizationFieldType) {
+    const createAndOpenUrl = (index, categorizationFieldType) => {
       // Find the ID of the index pattern with a title attribute which matches the
       // index configured in the datafeed. If a Kibana index pattern has not been created
       // for this index, then the user will see a warning message on the Discover tab advising
@@ -340,25 +340,25 @@ class LinksMenuUI extends Component {
             })
           );
         });
-    }
+    };
 
-    function error() {
-      console.log(
-        `viewExamples(): error finding type of field ${categorizationFieldName} in indices:`,
-        datafeedIndices
-      );
-      const { toasts } = this.props.kibana.services.notifications;
-      toasts.addDanger(
-        i18n.translate('xpack.ml.anomaliesTable.linksMenu.noMappingCouldBeFoundErrorMessage', {
-          defaultMessage:
-            'Unable to view examples of documents with mlcategory {categoryId} ' +
-            'as no mapping could be found for the categorization field {categorizationFieldName}',
-          values: {
-            categoryId,
-            categorizationFieldName,
-          },
+    function findFieldType(index) {
+      getFieldTypeFromMapping(index, categorizationFieldName)
+        .then(resp => {
+          if (resp !== '') {
+            createAndOpenUrl(index, resp);
+          } else {
+            i++;
+            if (i < datafeedIndices.length) {
+              findFieldType(datafeedIndices[i]);
+            } else {
+              error();
+            }
+          }
         })
-      );
+        .catch(() => {
+          error();
+        });
     }
   };
 

x-pack/legacy/plugins/ml/server/routes/apidoc.json

@@ -76,6 +76,8 @@
     "CreateFilter",
     "UpdateFilter",
     "DeleteFilter",
-    "GetFiltersStats"
+    "GetFiltersStats",
+    "Indices",
+    "FieldCaps"
   ]
 }

x-pack/legacy/plugins/ml/server/routes/indices.ts

@@ -0,0 +1,49 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { schema } from '@kbn/config-schema';
+import { wrapError } from '../client/error_wrapper';
+import { licensePreRoutingFactory } from '../new_platform/licence_check_pre_routing_factory';
+import { RouteInitialization } from '../new_platform/plugin';
+
+/**
+ * Indices routes.
+ */
+export function indicesRoutes({ xpackMainPlugin, router }: RouteInitialization) {
+  /**
+   * @apiGroup Indices
+   *
+   * @api {post} /api/ml/indices/field_caps
+   * @apiName FieldCaps
+   * @apiDescription Retrieves the capabilities of fields among multiple indices.
+   */
+  router.post(
+    {
+      path: '/api/ml/indices/field_caps',
+      validate: {
+        body: schema.object({
+          index: schema.maybe(schema.string()),
+          fields: schema.maybe(schema.arrayOf(schema.string())),
+        }),
+      },
+    },
+    licensePreRoutingFactory(xpackMainPlugin, async (context, request, response) => {
+      try {
+        const {
+          body: { index, fields: requestFields },
+        } = request;
+        const fields =
+          requestFields !== undefined && Array.isArray(requestFields)
+            ? requestFields.join(',')
+            : '*';
+        const result = await context.ml!.mlClient.callAsCurrentUser('fieldCaps', { index, fields });
+        return response.ok({ body: result });
+      } catch (e) {
+        return response.customError(wrapError(e));
+      }
+    })
+  );
+}