[Management] Provide a way to fetch index pattern titles (#13030)

* Refactor how `get_ids` works to enable fetching other properties of index patterns, specifically the `title` or name

* Remove unnecessary lines

* Only cache for `id` calls

src/ui/public/index_patterns/_get.js

@@ -1,38 +1,46 @@
 import _ from 'lodash';
 import { SavedObjectsClientProvider } from 'ui/saved_objects';
 
-export function IndexPatternsGetIdsProvider(Private) {
+export function IndexPatternsGetProvider(Private) {
   const savedObjectsClient = Private(SavedObjectsClientProvider);
 
   // many places may require the id list, so we will cache it separately
   // didn't incorporate with the indexPattern cache to prevent id collisions.
-  let cachedPromise;
+  let cachedIdPromise;
 
-  const getIds = function () {
-    if (cachedPromise) {
+  const get = function (field) {
+    if (field === 'id' && cachedIdPromise) {
       // return a clone of the cached response
-      return cachedPromise.then(function (cachedResp) {
+      return cachedIdPromise.then(function (cachedResp) {
         return _.clone(cachedResp);
       });
     }
 
-    cachedPromise = savedObjectsClient.find({
+    const promise = savedObjectsClient.find({
       type: 'index-pattern',
       fields: [],
       perPage: 10000
     }).then(resp => {
-      return resp.savedObjects.map(obj => obj.id);
+      return resp.savedObjects.map(obj => _.get(obj, field));
     });
 
+    if (field === 'id') {
+      cachedIdPromise = promise;
+    }
+
     // ensure that the response stays pristine by cloning it here too
-    return cachedPromise.then(function (resp) {
+    return promise.then(function (resp) {
       return _.clone(resp);
     });
   };
 
-  getIds.clearCache = function () {
-    cachedPromise = null;
+  return (field) => {
+    const getter = get.bind(get, field);
+    if (field === 'id') {
+      getter.clearCache = function () {
+        cachedIdPromise = null;
+      };
+    }
+    return getter;
   };
-
-  return getIds;
 }

src/ui/public/index_patterns/_index_pattern.js

@@ -7,7 +7,7 @@ import { Notifier } from 'ui/notify';
 
 import { getComputedFields } from './_get_computed_fields';
 import { formatHit } from './_format_hit';
-import { IndexPatternsGetIdsProvider } from './_get_ids';
+import { IndexPatternsGetProvider } from './_get';
 import { IndexPatternsIntervalsProvider } from './_intervals';
 import { IndexPatternsFieldListProvider } from './_field_list';
 import { IndexPatternsFlattenHitProvider } from './_flatten_hit';
@@ -29,7 +29,7 @@ export function getRoutes() {
 export function IndexPatternProvider(Private, $http, config, kbnIndex, Promise, confirmModalPromise, kbnUrl) {
   const fieldformats = Private(RegistryFieldFormatsProvider);
   const getConfig = (...args) => config.get(...args);
-  const getIds = Private(IndexPatternsGetIdsProvider);
+  const getIds = Private(IndexPatternsGetProvider)('id');
   const fieldsFetcher = Private(FieldsFetcherProvider);
   const intervals = Private(IndexPatternsIntervalsProvider);
   const mappingSetup = Private(UtilsMappingSetupProvider);

src/ui/public/index_patterns/index_patterns.js

@@ -2,7 +2,7 @@ import 'ui/filters/short_dots';
 import { IndexPatternMissingIndices } from 'ui/errors';
 import { IndexPatternProvider } from 'ui/index_patterns/_index_pattern';
 import { IndexPatternsPatternCacheProvider } from 'ui/index_patterns/_pattern_cache';
-import { IndexPatternsGetIdsProvider } from 'ui/index_patterns/_get_ids';
+import { IndexPatternsGetProvider } from 'ui/index_patterns/_get';
 import { IndexPatternsIntervalsProvider } from 'ui/index_patterns/_intervals';
 import { FieldsFetcherProvider } from './fields_fetcher_provider';
 import { RegistryFieldFormatsProvider } from 'ui/registry/field_formats';
@@ -16,6 +16,7 @@ export function IndexPatternsProvider(Notifier, Private) {
 
   const IndexPattern = Private(IndexPatternProvider);
   const patternCache = Private(IndexPatternsPatternCacheProvider);
+  const getProvider = Private(IndexPatternsGetProvider);
 
   self.get = function (id) {
     if (!id) return self.make();
@@ -38,7 +39,8 @@ export function IndexPatternsProvider(Notifier, Private) {
   };
 
   self.cache = patternCache;
-  self.getIds = Private(IndexPatternsGetIdsProvider);
+  self.getIds = getProvider('id');
+  self.getTitles = getProvider('attributes.title');
   self.intervals = Private(IndexPatternsIntervalsProvider);
   self.fieldsFetcher = Private(FieldsFetcherProvider);
   self.fieldFormats = Private(RegistryFieldFormatsProvider);

src/ui/public/index_patterns/route_setup/load_default.js

@@ -1,7 +1,7 @@
 import _ from 'lodash';
 import { Notifier } from 'ui/notify/notifier';
 import { NoDefaultIndexPattern } from 'ui/errors';
-import { IndexPatternsGetIdsProvider } from '../_get_ids';
+import { IndexPatternsGetProvider } from '../_get';
 import uiRoutes from 'ui/routes';
 const notify = new Notifier({
   location: 'Index Patterns'
@@ -15,7 +15,7 @@ export default function (opts) {
 
   uiRoutes
   .addSetupWork(function loadDefaultIndexPattern(Private, Promise, $route, config) {
-    const getIds = Private(IndexPatternsGetIdsProvider);
+    const getIds = Private(IndexPatternsGetProvider)('id');
     const route = _.get($route, 'current.$$route');
 
     return getIds()