episode populator

src/app/controllers/lib/populators.ts

@@ -12,6 +12,7 @@ import { WebController, WebError } from "../../../lib/dtplib.js";
 import { ImageService } from "../../services/image.js";
 import { UserService } from "../../services/user.js";
 import { BroadcastShowService } from "app/services/broadcast-show.js";
+import { EpisodeService } from "app/services/episode.js";
 
 export function populateAccountByEmail(
   controller: WebController
@@ -94,6 +95,33 @@ export function populateBroadcastShow(
   };
 }
 
+export function populateEpisode(controller: WebController): RequestHandler {
+  const episodeService = controller.getService<EpisodeService>("episode");
+  return async function (
+    _req: Request,
+    res: Response,
+    next: NextFunction,
+    episodeId?: string
+  ): Promise<void> {
+    assert(episodeId, "Episode ID is required");
+    try {
+      res.locals.show = await episodeService.getById(
+        Types.ObjectId.createFromHexString(episodeId)
+      );
+      if (!res.locals.show) {
+        throw new WebError(404, "Broadcast show not found");
+      }
+      return next();
+    } catch (error) {
+      controller.log.error("failed to populate episode ID", {
+        episodeId,
+        error,
+      });
+      return next(error);
+    }
+  };
+}
+
 export function populateImageId(controller: WebController): RequestHandler {
   const imageService =
     controller.platform.components.getService<ImageService>("image");