Improve login and registration pages (#2794)

* Keep the user on login page on failure

* Show an error if username already exists

* Check the password format in the backend

* Return a better message if username is invalid

* Add a title to the login page

* wip: Improve look of login and register pages

* Set a capital M in username help message

On the registration page, username tip started with a minuscule, while
the password tip started with a capital.

* Change message if username is taken

1 files changed, 13 insertions, 0 deletions

diff --git a/app/Utils/passwordUtil.php b/app/Utils/passwordUtil.php
index fd71d4b72..e382f76f5 100644
--- a/app/Utils/passwordUtil.php
+++ b/app/Utils/passwordUtil.php
@@ -24,4 +24,17 @@ class FreshRSS_password_Util {
 
 		return $passwordHash == '' ? '' : $passwordHash;
 	}
+
+	/**
+	 * Verify the given password is valid.
+	 *
+	 * A valid password is a string of at least 7 characters.
+	 *
+	 * @param string $password
+	 *
+	 * @return boolean True if the password is valid, false otherwise
+	 */
+	public static function check($password) {
+		return strlen($password) >= 7;
+	}
 }