fix: update Topics.post and Topics.reply so that plugins can modify uid (or redirect a reply to a different topic)

/cc @antosik

src/topics/create.js

@@ -76,7 +76,7 @@ module.exports = function (Topics) {
 	};
 
 	Topics.post = async function (data) {
-		const { uid } = data;
+		let { uid } = data;
 		data.title = String(data.title).trim();
 		data.tags = data.tags || [];
 		if (data.content) {
@@ -105,8 +105,9 @@ module.exports = function (Topics) {
 		if (!data.fromQueue) {
 			await user.isReadyToPost(data.uid, data.cid);
 		}
-		const filteredData = await plugins.hooks.fire('filter:topic.post', data);
-		data = filteredData;
+
+		data = await plugins.hooks.fire('filter:topic.post', data);
+		({ uid } = data);	// uid was explicitly destructured at top, so update if changed
 		const tid = await Topics.create(data);
 
 		let postData = data;
@@ -152,6 +153,7 @@ module.exports = function (Topics) {
 	};
 
 	Topics.reply = async function (data) {
+		data = await plugins.hooks.fire('filter:topic.reply', data);
 		const { tid } = data;
 		const { uid } = data;
 
@@ -165,7 +167,6 @@ module.exports = function (Topics) {
 		if (!data.fromQueue) {
 			await user.isReadyToPost(uid, data.cid);
 		}
-		await plugins.hooks.fire('filter:topic.reply', data);
 		if (data.content) {
 			data.content = utils.rtrim(data.content);
 		}