feat: added featured comment notifications (#2524)

src/core/server/models/story/helpers.ts

@@ -1,6 +1,10 @@
+import { DateTime } from "luxon";
 import { URL } from "url";
 
 import { parseQuery, stringifyQuery } from "coral-common/utils";
+import { Tenant } from "coral-server/models/tenant";
+
+import { Story } from ".";
 
 /**
  * getURLWithCommentID returns the url with the comment id.
@@ -15,3 +19,40 @@ export function getURLWithCommentID(storyURL: string, commentID?: string) {
 
   return url.toString();
 }
+
+export function getStoryTitle(story: Pick<Story, "metadata" | "url">) {
+  return story.metadata && story.metadata.title
+    ? story.metadata.title
+    : story.url;
+}
+
+export function getStoryClosedAt(
+  tenant: Pick<Tenant, "closeCommenting">,
+  story: Pick<Story, "closedAt" | "createdAt">
+): Story["closedAt"] {
+  // Try to get the closedAt time from the story.
+  if (story.closedAt) {
+    return story.closedAt;
+  }
+
+  // Check to see if the story has been forced open again.
+  if (story.closedAt === false) {
+    return false;
+  }
+
+  // If the story hasn't already been closed, then check to see if the Tenant
+  // has the auto close stream enabled.
+  if (tenant.closeCommenting.auto) {
+    // Auto-close stream has been enabled, convert the createdAt time into the
+    // closedAt time by adding the closedTimeout.
+    return (
+      DateTime.fromJSDate(story.createdAt)
+        // closedTimeout is in seconds, so multiply by 1000 to get
+        // milliseconds.
+        .plus(tenant.closeCommenting.timeout * 1000)
+        .toJSDate()
+    );
+  }
+
+  return;
+}