feat: allow customizing uploads.upload socket methods

closes #12416

src/socket.io/uploads.js

@@ -4,32 +4,41 @@ const socketUser = require('./user');
 const socketGroup = require('./groups');
 const image = require('../image');
 const meta = require('../meta');
+const plugins = require('../plugins');
 
 const inProgress = {};
 
 const uploads = module.exports;
 
 uploads.upload = async function (socket, data) {
-	const methodToFunc = {
-		'user.uploadCroppedPicture': socketUser.uploadCroppedPicture,
-		'user.updateCover': socketUser.updateCover,
-		'groups.cover.update': socketGroup.cover.update,
-	};
-	if (!socket.uid || !data || !data.chunk ||
-		!data.params || !data.params.method || !methodToFunc.hasOwnProperty(data.params.method)) {
+	if (!socket.uid || !data || !data.chunk || !data.params || !data.params.method) {
+		throw new Error('[[error:invalid-data]]');
+	}
+	const { method } = data.params;
+	const defaultMaxSize = method === 'user.uploadCroppedPicture' ?
+		meta.config.maximumProfileImageSize : meta.config.maximumCoverImageSize;
+
+	const { methods, maxSize } = await plugins.hooks.fire('filter:uploads.upload', {
+		methods: {
+			'user.uploadCroppedPicture': socketUser.uploadCroppedPicture,
+			'user.updateCover': socketUser.updateCover,
+			'groups.cover.update': socketGroup.cover.update,
+		},
+		maxSize: defaultMaxSize,
+		data: data,
+	});
+
+	if (!methods.hasOwnProperty(data.params.method)) {
 		throw new Error('[[error:invalid-data]]');
 	}
 
 	inProgress[socket.id] = inProgress[socket.id] || Object.create(null);
 	const socketUploads = inProgress[socket.id];
-	const { method } = data.params;
 
 	socketUploads[method] = socketUploads[method] || { imageData: '' };
 	socketUploads[method].imageData += data.chunk;
 
 	try {
-		const maxSize = data.params.method === 'user.uploadCroppedPicture' ?
-			meta.config.maximumProfileImageSize : meta.config.maximumCoverImageSize;
 		const size = image.sizeFromBase64(socketUploads[method].imageData);
 
 		if (size > maxSize * 1024) {
@@ -39,7 +48,7 @@ uploads.upload = async function (socket, data) {
 			return;
 		}
 		data.params.imageData = socketUploads[method].imageData;
-		const result = await methodToFunc[data.params.method](socket, data.params);
+		const result = await methods[method](socket, data.params);
 		delete socketUploads[method];
 		return result;
 	} catch (err) {