[Chore] Rename field_caps filter-param to indexFilter (#147480)

Field-caps API
https://www.elastic.co/guide/en/elasticsearch/reference/current/search-field-caps.html
has an `index_filter` param, which Kibana is calling `filter`.

Renaming to `indexFilter` for consistency, to avoid confusion.

Main reason for putting up this PR was to help identify usage of
`index_filter`-param of field-caps in the code-base.

src/plugins/data_views/common/data_views/data_views.ts

@@ -502,7 +502,7 @@ export class DataViewsService {
       type: options.type,
       rollupIndex: options.rollupIndex,
       allowNoIndex: options.allowNoIndex,
-      filter: options.filter,
+      indexFilter: options.indexFilter,
     });
     return fields;
   };
@@ -543,7 +543,7 @@ export class DataViewsService {
       type: options.type,
       rollupIndex: options.rollupIndex,
       allowNoIndex: options.allowNoIndex,
-      filter: options.filter,
+      indexFilter: options.indexFilter,
     });
   };
 

src/plugins/data_views/common/types.ts

@@ -313,7 +313,7 @@ export interface GetFieldsOptions {
   metaFields?: string[];
   rollupIndex?: string;
   allowNoIndex?: boolean;
-  filter?: QueryDslQueryContainer;
+  indexFilter?: QueryDslQueryContainer;
   includeUnmapped?: boolean;
 }
 

src/plugins/data_views/public/data_views/data_views_api_client.ts

@@ -49,7 +49,7 @@ export class DataViewsApiClient implements IDataViewsApiClient {
    * @param options options for fields request
    */
   getFieldsForWildcard(options: GetFieldsOptions) {
-    const { pattern, metaFields, type, rollupIndex, allowNoIndex, filter, includeUnmapped } =
+    const { pattern, metaFields, type, rollupIndex, allowNoIndex, indexFilter, includeUnmapped } =
       options;
     return this._request<FieldsForWildcardResponse>(
       this._getUrl(['_fields_for_wildcard']),
@@ -61,7 +61,7 @@ export class DataViewsApiClient implements IDataViewsApiClient {
         allow_no_index: allowNoIndex,
         include_unmapped: includeUnmapped,
       },
-      filter ? JSON.stringify({ index_filter: filter }) : undefined
+      indexFilter ? JSON.stringify({ index_filter: indexFilter }) : undefined
     ).then((response) => {
       return response || { fields: [], indices: [] };
     });

src/plugins/data_views/server/fetcher/index_patterns_fetcher.ts

@@ -60,9 +60,9 @@ export class IndexPatternsFetcher {
     fieldCapsOptions?: { allow_no_indices: boolean; includeUnmapped?: boolean };
     type?: string;
     rollupIndex?: string;
-    filter?: QueryDslQueryContainer;
+    indexFilter?: QueryDslQueryContainer;
   }): Promise<{ fields: FieldDescriptor[]; indices: string[] }> {
-    const { pattern, metaFields = [], fieldCapsOptions, type, rollupIndex, filter } = options;
+    const { pattern, metaFields = [], fieldCapsOptions, type, rollupIndex, indexFilter } = options;
     const patternList = Array.isArray(pattern) ? pattern : pattern.split(',');
     const allowNoIndices = fieldCapsOptions
       ? fieldCapsOptions.allow_no_indices
@@ -80,7 +80,7 @@ export class IndexPatternsFetcher {
         allow_no_indices: allowNoIndices,
         include_unmapped: fieldCapsOptions?.includeUnmapped,
       },
-      filter,
+      indexFilter,
     });
     if (type === 'rollup' && rollupIndex) {
       const rollupFields: FieldDescriptor[] = [];

src/plugins/data_views/server/fetcher/lib/es_api.ts

@@ -43,7 +43,7 @@ interface FieldCapsApiParams {
   callCluster: ElasticsearchClient;
   indices: string[] | string;
   fieldCapsOptions?: { allow_no_indices: boolean; include_unmapped?: boolean };
-  filter?: QueryDslQueryContainer;
+  indexFilter?: QueryDslQueryContainer;
 }
 
 /**
@@ -62,7 +62,7 @@ export async function callFieldCapsApi(params: FieldCapsApiParams) {
   const {
     callCluster,
     indices,
-    filter,
+    indexFilter,
     fieldCapsOptions = {
       allow_no_indices: false,
       include_unmapped: false,
@@ -74,7 +74,7 @@ export async function callFieldCapsApi(params: FieldCapsApiParams) {
         index: indices,
         fields: '*',
         ignore_unavailable: true,
-        index_filter: filter,
+        index_filter: indexFilter,
         ...fieldCapsOptions,
       },
       { meta: true }

src/plugins/data_views/server/fetcher/lib/field_capabilities/field_capabilities.test.js

@@ -35,7 +35,7 @@ describe('index_patterns/field_capabilities/field_capabilities', () => {
     callCluster: undefined,
     indices: undefined,
     fieldCapsOptions: undefined,
-    filter: undefined,
+    indexFilter: undefined,
     ...args,
   });
 

src/plugins/data_views/server/fetcher/lib/field_capabilities/field_capabilities.ts

@@ -20,7 +20,7 @@ interface FieldCapabilitiesParams {
   indices: string | string[];
   metaFields: string[];
   fieldCapsOptions?: { allow_no_indices: boolean; include_unmapped?: boolean };
-  filter?: QueryDslQueryContainer;
+  indexFilter?: QueryDslQueryContainer;
 }
 
 /**
@@ -34,8 +34,13 @@ interface FieldCapabilitiesParams {
  *  @return {Promise<{ fields: Array<FieldDescriptor>, indices: Array<string>>}>}
  */
 export async function getFieldCapabilities(params: FieldCapabilitiesParams) {
-  const { callCluster, indices = [], fieldCapsOptions, filter, metaFields = [] } = params;
-  const esFieldCaps = await callFieldCapsApi({ callCluster, indices, fieldCapsOptions, filter });
+  const { callCluster, indices = [], fieldCapsOptions, indexFilter, metaFields = [] } = params;
+  const esFieldCaps = await callFieldCapsApi({
+    callCluster,
+    indices,
+    fieldCapsOptions,
+    indexFilter,
+  });
   const fieldsFromFieldCapsByName = keyBy(readFieldCapsResponse(esFieldCaps.body), 'name');
 
   const allFieldsUnsorted = Object.keys(fieldsFromFieldCapsByName)

src/plugins/data_views/server/index_patterns_api_client.ts

@@ -26,7 +26,7 @@ export class IndexPatternsApiServer implements IDataViewsApiClient {
     type,
     rollupIndex,
     allowNoIndex,
-    filter,
+    indexFilter: indexFilter,
   }: GetFieldsOptions) {
     const indexPatterns = new IndexPatternsFetcher(this.esClient, allowNoIndex);
     return await indexPatterns
@@ -35,7 +35,7 @@ export class IndexPatternsApiServer implements IDataViewsApiClient {
         metaFields,
         type,
         rollupIndex,
-        filter,
+        indexFilter,
       })
       .catch((err) => {
         if (

src/plugins/data_views/server/routes/fields_for.ts

@@ -66,7 +66,7 @@ const handler: RequestHandler<{}, IQuery, IBody> = async (context, request, resp
   } = request.query;
 
   // not available to get request
-  const filter = request.body?.index_filter;
+  const indexFilter = request.body?.index_filter;
 
   let parsedFields: string[] = [];
   try {
@@ -85,7 +85,7 @@ const handler: RequestHandler<{}, IQuery, IBody> = async (context, request, resp
         allow_no_indices: allowNoIndex || false,
         includeUnmapped,
       },
-      filter,
+      indexFilter,
     });
 
     return response.ok({

src/plugins/unified_field_list/common/utils/field_existing_utils.ts

@@ -71,7 +71,7 @@ export async function fetchFieldExistence({
   const existingFieldList = await dataViewsService.getFieldsForIndexPattern(dataView, {
     // filled in by data views service
     pattern: '',
-    filter: toQuery(timeFieldName, fromDate, toDate, dslQuery),
+    indexFilter: toQuery(timeFieldName, fromDate, toDate, dslQuery),
   });
   return {
     indexPatternTitle: dataView.title,