add reverse support to db.processSortedSet (#11826)

src/batch.js

@@ -23,6 +23,7 @@ exports.processSortedSet = async function (setKey, process, options) {
 	}
 
 	options.batch = options.batch || DEFAULT_BATCH_SIZE;
+	options.reverse = options.reverse || false;
 
 	// use the fast path if possible
 	if (db.processSortedSet && typeof options.doneIf !== 'function' && !utils.isNumber(options.alwaysStartAt)) {
@@ -38,10 +39,10 @@ exports.processSortedSet = async function (setKey, process, options) {
 	if (process && process.constructor && process.constructor.name !== 'AsyncFunction') {
 		process = util.promisify(process);
 	}
-
+	const method = options.reverse ? 'getSortedSetRevRange' : 'getSortedSetRange';
 	while (true) {
 		/* eslint-disable no-await-in-loop */
-		const ids = await db[`getSortedSetRange${options.withScores ? 'WithScores' : ''}`](setKey, start, stop);
+		const ids = await db[`${method}${options.withScores ? 'WithScores' : ''}`](setKey, start, stop);
 		if (!ids.length || options.doneIf(start, stop, ids)) {
 			return;
 		}

src/database/mongo/sorted.js

@@ -563,12 +563,12 @@ module.exports = function (module) {
 		let done = false;
 		const ids = [];
 		const project = { _id: 0, _key: 0 };
-
+		const sort = options.reverse ? -1 : 1;
 		if (!options.withScores) {
 			project.score = 0;
 		}
 		const cursor = await module.client.collection('objects').find({ _key: setKey }, { projection: project })
-			.sort({ score: 1 })
+			.sort({ score: sort })
 			.batchSize(options.batch);
 
 		if (processFn && processFn.constructor && processFn.constructor.name !== 'AsyncFunction') {

src/database/postgres/sorted.js

@@ -664,6 +664,7 @@ SELECT z."value",
 	module.processSortedSet = async function (setKey, process, options) {
 		const client = await module.pool.connect();
 		const batchSize = (options || {}).batch || 100;
+		const sort = options.reverse ? 'DESC' : 'ASC';
 		const cursor = client.query(new Cursor(`
 SELECT z."value", z."score"
   FROM "legacy_object_live" o
@@ -671,7 +672,7 @@ SELECT z."value", z."score"
          ON o."_key" = z."_key"
         AND o."type" = z."type"
  WHERE o."_key" = $1::TEXT
- ORDER BY z."score" ASC, z."value" ASC`, [setKey]));
+ ORDER BY z."score" ${sort}, z."value" ${sort}`, [setKey]));
 
 		if (process && process.constructor && process.constructor.name !== 'AsyncFunction') {
 			process = util.promisify(process);

src/messaging/notifications.js

@@ -83,6 +83,7 @@ module.exports = function (Messaging) {
 
 			notifications.push(notification, uids);
 		}, {
+			reverse: true,
 			batch: 500,
 			interval: 1000,
 		});