[CORL-836] Create activeStories endpoint (#2787)

* Create activeStories GraphQL query endpoint

Set lastCommentedAt on stories when they are
commented upon.
Use lastCommentedAt to retrieve the activeStories.
Create a migration to partial index
lastCommentedAt on stories to make retrieval fast.

CORL-836

* fix: adjusted query to use index, more @auth directives

Co-authored-by: Wyatt Johnson <accounts+github@wyattjoh.ca>

src/core/server/graph/loaders/Comments.ts

@@ -3,19 +3,6 @@ import { defaultTo, isNil, omitBy } from "lodash";
 import { DateTime } from "luxon";
 
 import Context from "coral-server/graph/context";
-import {
-  CommentToParentsArgs,
-  CommentToRepliesArgs,
-  GQLActionPresence,
-  GQLCOMMENT_SORT,
-  GQLTAG,
-  GQLUSER_ROLE,
-  QueryToCommentsArgs,
-  StoryToCommentsArgs,
-  UserToAllCommentsArgs,
-  UserToCommentsArgs,
-  UserToRejectedCommentsArgs,
-} from "coral-server/graph/schema/__generated__/types";
 import { retrieveManyUserActionPresence } from "coral-server/models/action/comment";
 import {
   Comment,
@@ -36,6 +23,20 @@ import { Connection } from "coral-server/models/helpers";
 import { retrieveSharedModerationQueueQueuesCounts } from "coral-server/models/story/counts/shared";
 import { User } from "coral-server/models/user";
 
+import {
+  CommentToParentsArgs,
+  CommentToRepliesArgs,
+  GQLActionPresence,
+  GQLCOMMENT_SORT,
+  GQLTAG,
+  GQLUSER_ROLE,
+  QueryToCommentsArgs,
+  StoryToCommentsArgs,
+  UserToAllCommentsArgs,
+  UserToCommentsArgs,
+  UserToRejectedCommentsArgs,
+} from "coral-server/graph/schema/__generated__/types";
+
 import { SingletonResolver } from "./util";
 
 const tagFilter = (tag?: GQLTAG): CommentConnectionInput["filter"] => {

src/core/server/graph/loaders/Stories.ts

@@ -2,12 +2,9 @@ import DataLoader from "dataloader";
 import { defaultTo } from "lodash";
 
 import GraphContext from "coral-server/graph/context";
-import {
-  GQLSTORY_STATUS,
-  QueryToStoriesArgs,
-} from "coral-server/graph/schema/__generated__/types";
 import { Connection } from "coral-server/models/helpers";
 import {
+  retrieveActiveStories,
   retrieveManyStories,
   retrieveStoryConnection,
   Story,
@@ -21,6 +18,11 @@ import {
 } from "coral-server/services/stories";
 import { scraper } from "coral-server/services/stories/scraper";
 
+import {
+  GQLSTORY_STATUS,
+  QueryToStoriesArgs,
+} from "coral-server/graph/schema/__generated__/types";
+
 import { createManyBatchLoadFn } from "./util";
 
 const statusFilter = (
@@ -127,4 +129,6 @@ export default (ctx: GraphContext) => ({
       cache: !ctx.disableCaching,
     }
   ),
+  activeStories: (limit: number) =>
+    retrieveActiveStories(ctx.mongo, ctx.tenant.id, limit),
 });