clear rating cache

src/routes/ratings/postClearCache.ts

@@ -0,0 +1,52 @@
+import { Logger } from "../../utils/logger";
+import { HashedUserID, UserID } from "../../types/user.model";
+import { getHash } from "../../utils/getHash";
+import { Request, Response } from "express";
+import { Service, VideoID } from "../../types/segments.model";
+import { QueryCacher } from "../../utils/queryCacher";
+import { isUserVIP } from "../../utils/isUserVIP";
+import { VideoIDHash } from "../../types/segments.model";
+import { getService } from "../..//utils/getService";
+
+export async function postClearCache(req: Request, res: Response): Promise<Response> {
+    const videoID = req.query.videoID as VideoID;
+    const userID = req.query.userID as UserID;
+    const service = getService(req.query.service as Service);
+
+    const invalidFields = [];
+    if (typeof videoID !== "string") {
+        invalidFields.push("videoID");
+    }
+    if (typeof userID !== "string") {
+        invalidFields.push("userID");
+    }
+
+    if (invalidFields.length !== 0) {
+        // invalid request
+        const fields = invalidFields.reduce((p, c, i) => p + (i !== 0 ? ", " : "") + c, "");
+        return res.status(400).send(`No valid ${fields} field(s) provided`);
+    }
+
+    // hash the userID as early as possible
+    const hashedUserID: HashedUserID = getHash(userID);
+    // hash videoID
+    const hashedVideoID: VideoIDHash = getHash(videoID, 1);
+
+    // Ensure user is a VIP
+    if (!(await isUserVIP(hashedUserID))){
+        Logger.warn(`Permission violation: User ${hashedUserID} attempted to clear cache for video ${videoID}.`);
+        return res.status(403).json({ "message": "Not a VIP" });
+    }
+
+    try {
+        QueryCacher.clearRatingCache({
+            hashedVideoID,
+            service
+        });
+        return res.status(200).json({
+            message: `Cache cleared on video ${videoID}`
+        });
+    } catch(err) {
+        return res.sendStatus(500);
+    }
+}