feat: adding filter:login.check and loginFormEntry[] for the filter:login.build hook (#7861)

* adding filter:login.check and loginFormEntry[] for the filter:login.build hook, related to nodebb-plugin-spam-be-gone/issues/32

* do not exceed 50 lines per function

* spam-be-gone@0.6.4

src/controllers/authentication.js

@@ -201,6 +201,10 @@ authenticationController.login = function (req, res, next) {
 	var loginWith = meta.config.allowLoginWith || 'username-email';
 	req.body.username = req.body.username.trim();
 
+	plugins.fireHook('filter:login.check', { req: req, res: res, userData: req.body }, (err) => {
+		if (err) {
+			return helpers.noScriptErrors(req, res, err.message, 403);
+		}
 		if (req.body.username && utils.isEmailValid(req.body.username) && loginWith.includes('email')) {
 			async.waterfall([
 				function (next) {
@@ -214,9 +218,10 @@ authenticationController.login = function (req, res, next) {
 		} else if (loginWith.includes('username') && !validator.isEmail(req.body.username)) {
 			continueLogin(req, res, next);
 		} else {
-		var err = '[[error:wrong-login-type-' + loginWith + ']]';
+			err = '[[error:wrong-login-type-' + loginWith + ']]';
 			helpers.noScriptErrors(req, res, err, 500);
 		}
+	});
 };
 
 function continueLogin(req, res, next) {

src/controllers/index.js

@@ -96,7 +96,7 @@ Controllers.reset = function (req, res, next) {
 };
 
 Controllers.login = function (req, res, next) {
-	var data = {};
+	var data = { loginFormEntry: [] };
 	var loginStrategies = require('../routes/authentication').getLoginStrategies();
 	var registrationType = meta.config.registrationType || 'normal';
 	var allowLoginWith = (meta.config.allowLoginWith || 'username-email');