1 files changed, 80 insertions, 0 deletions
diff --git a/apps/settings/src/utils/validate.js b/apps/settings/src/utils/validate.js
new file mode 100644
index 00000000000..0f76f4e6dc5
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+++ b/apps/settings/src/utils/validate.js
@@ -0,0 +1,80 @@
+/**
+ * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+/*
+ * Frontend validators, less strict than backend validators
+ *
+ * TODO add nice validation errors for Profile page settings modal
+ */
+
+import { VALIDATE_EMAIL_REGEX } from '../constants/AccountPropertyConstants.ts'
+
+/**
+ * Validate the email input
+ *
+ * Compliant with PHP core FILTER_VALIDATE_EMAIL validator*
+ *
+ * Reference implementation https://github.com/mpyw/FILTER_VALIDATE_EMAIL.js/blob/71e62ca48841d2246a1b531e7e84f5a01f15e615/src/index.ts*
+ *
+ * @param {string} input the input
+ * @return {boolean}
+ */
+export function validateEmail(input) {
+	return typeof input === 'string'
+		&& VALIDATE_EMAIL_REGEX.test(input)
+		&& input.slice(-1) !== '\n'
+		&& input.length <= 320
+		&& encodeURIComponent(input).replace(/%../g, 'x').length <= 320
+}
+
+/**
+ * Validate the URL input
+ *
+ * @param {string} input the input
+ * @return {boolean}
+ */
+export function validateUrl(input) {
+	try {
+		// eslint-disable-next-line no-new
+		new URL(input)
+		return true
+	} catch (e) {
+		return false
+	}
+}
+
+/**
+ * Validate the language input
+ *
+ * @param {object} input the input
+ * @return {boolean}
+ */
+export function validateLanguage(input) {
+	return input.code !== ''
+		&& input.name !== ''
+		&& input.name !== undefined
+}
+
+/**
+ * Validate the locale input
+ *
+ * @param {object} input the input
+ * @return {boolean}
+ */
+export function validateLocale(input) {
+	return input.code !== ''
+		&& input.name !== ''
+		&& input.name !== undefined
+}
+
+/**
+ * Validate boolean input
+ *
+ * @param {boolean} input the input
+ * @return {boolean}
+ */
+export function validateBoolean(input) {
+	return typeof input === 'boolean'
+}