[stable10] Backport of Add email validation to core utility

This would help us to re-use the email validation
in places where required, by just calling,
OC.validateEmail(). In this change, email
validation for public link is using the new
method.

Signed-off-by: Sujith H <sharidasan@owncloud.com>

core/js/js.js

@@ -427,6 +427,21 @@ var OC = {
 		return path.replace(/\\/g, '/').replace(/.*\//, '');
 	},
 
+	/**
+	 * Returns true if the email regexp matches the email address else false returned
+	 * For example if email is "abc@foo.com", it will return true.
+	 * If email address is "abc@foo.c", then false will be returned.
+	 *
+	 * @param emailAddress
+	 * @returns {boolean}
+	 *
+	 * @since 10.1.0
+	 */
+	validateEmail: function(emailAddress) {
+		var emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@\.]{2,}$/;
+		return (emailRegex.exec(emailAddress) !== null);
+	},
+
 	/**
 	 * Returns the dir name of the given path.
 	 * For example for "/abc/somefile.txt" it will return "/abc"

core/js/sharedialogmailview.js

@@ -137,7 +137,7 @@
 			if (email.length === 0)
 				return true
 
-			return email.match(/^[A-Za-z0-9\._%+-]+@(?:[A-Za-z0-9-]+\.)+[a-z]{2,}$/);
+			return OC.validateEmail(email);
 		},
 
 		sendEmails: function() {

core/js/tests/specs/coreSpec.js

@@ -35,6 +35,29 @@ describe('Core base tests', function() {
 			expect(OC.appswebroots).toBeDefined();
 		});
 	});
+	describe('validateEmail', function () {
+		it('Returns false for search abc@foo', function () {
+			expect(OC.validateEmail('abc@foo')).toEqual(false);
+		});
+		it('Returns false for search abc@foo.', function () {
+			expect(OC.validateEmail('abc@foo.')).toEqual(false);
+		});
+		it('Returns false for search abc', function () {
+			expect(OC.validateEmail('abc')).toEqual(false);
+		});
+		it('Returns false for search abc@foo.a', function () {
+			expect(OC.validateEmail('abc@foo.a')).toEqual(false);
+		});
+		it('Returns true for search abc@foo.aa', function () {
+			expect(OC.validateEmail('abc@foo.aa')).toEqual(true);
+		});
+		it('Returns true for search abc@f.aaa', function () {
+			expect(OC.validateEmail('abc@f.aaa')).toEqual(true);
+		});
+		it('Returns true for search müller@Émile.诶西艾弗.буки', function () {
+			expect(OC.validateEmail('müller@Émile.诶西艾弗.буки')).toEqual(true);
+		});
+	});
 	describe('basename', function() {
 		it('Returns the nothing if no file name given', function() {
 			expect(OC.basename('')).toEqual('');

core/js/tests/specs/sharedialogmailviewSpec.js

@@ -102,14 +102,13 @@ describe('OC.Share.ShareDialogMailView', function() {
 
 	describe('validating addresses', function() {
 		it('works as expected', function() {
-			expect(view.validateEmail('Ada.Wong@umbrella.com')[0]).toEqual('Ada.Wong@umbrella.com');
-			expect(view.validateEmail('Albert.Wesker@umbrella.sub-domain.com')[0]).toEqual('Albert.Wesker@umbrella.sub-domain.com');
-			expect(view.validateEmail('Albert_Wesker@umbrella.sub-domain.com')[0]).toEqual('Albert_Wesker@umbrella.sub-domain.com');
-			expect(view.validateEmail('Albert-Wesker@umbrella-new.sub-domain.com')[0]).toEqual('Albert-Wesker@umbrella-new.sub-domain.com');
-
-			expect(view.validateEmail('Jill.Valentine@umbrella..com')).toEqual(null);
-			expect(view.validateEmail('Jill.Valentine@um#rella.com')).toEqual(null);
-			expect(view.validateEmail('Jürgen.Sörensen@umbrella.com')).toEqual(null);
+			expect(view.validateEmail('Ada.Wong@umbrella.com')).toEqual(true);
+			expect(view.validateEmail('Albert.Wesker@umbrella.sub-domain.com')).toEqual(true);
+			expect(view.validateEmail('Albert_Wesker@umbrella.sub-domain.com')).toEqual(true);
+			expect(view.validateEmail('Albert-Wesker@umbrella-new.sub-domain.com')).toEqual(true);
+			expect(view.validateEmail('Jill.Valentine@um#rella.com')).toEqual(true);
+
+			expect(view.validateEmail('Jill.Valentine@umbrella..c')).toEqual(false);
 		});
 	});