3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2008, 2009, StatusNet, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 * Regex fragment for pulling a formated nickname *OR* ID number.
24 * Suitable for router def of 'id' parameters on API actions.
26 * Not guaranteed to be valid after normalization; run the string through
27 * Nickname::normalize() to get the canonical form, or Nickname::isValid()
28 * if you just need to check if it's properly formatted.
30 * This, DISPLAY_FMT, and CANONICAL_FMT replace the old NICKNAME_FMT,
31 * but be aware that these should not be enclosed in []s.
33 * @fixme would prefer to define in reference to the other constants
35 const INPUT_FMT = '(?:[0-9]+|[0-9a-zA-Z_]{1,64})';
38 * Regex fragment for acceptable user-formatted variant of a nickname.
39 * This includes some chars such as underscore which will be removed
40 * from the normalized canonical form, but still must fit within
41 * field length limits.
43 * Not guaranteed to be valid after normalization; run the string through
44 * Nickname::normalize() to get the canonical form, or Nickname::isValid()
45 * if you just need to check if it's properly formatted.
47 * This and CANONICAL_FMT replace the old NICKNAME_FMT, but be aware
48 * that these should not be enclosed in []s.
50 const DISPLAY_FMT = '[0-9a-zA-Z_]{1,64}';
53 * Regex fragment for checking a canonical nickname.
55 * Any non-matching string is not a valid canonical/normalized nickname.
56 * Matching strings are valid and canonical form, but may still be
57 * unavailable for registration due to blacklisting et.
59 * Only the canonical forms should be stored as keys in the database;
60 * there are multiple possible denormalized forms for each valid
61 * canonical-form name.
63 * This and DISPLAY_FMT replace the old NICKNAME_FMT, but be aware
64 * that these should not be enclosed in []s.
66 const CANONICAL_FMT = '[0-9a-z]{1,64}';
69 * Maximum number of characters in a canonical-form nickname.
74 * Nice simple check of whether the given string is a valid input nickname,
75 * which can be normalized into an internally canonical form.
77 * Note that valid nicknames may be in use or reserved.
82 public static function isValid($str)
85 self::normalize($str);
87 } catch (NicknameException $e) {
93 * Validate an input nickname string, and normalize it to its canonical form.
94 * The canonical form will be returned, or an exception thrown if invalid.
97 * @return string Normalized canonical form of $str
99 * @throws NicknameException (base class)
100 * @throws NicknameInvalidException
101 * @throws NicknameEmptyException
102 * @throws NicknameTooLongException
104 public static function normalize($str)
106 if (mb_strlen($str) > self::MAX_LEN) {
107 // Display forms must also fit!
108 throw new NicknameTooLongException();
112 $str = str_replace('_', '', $str);
113 $str = mb_strtolower($str);
115 if (mb_strlen($str) < 1) {
116 throw new NicknameEmptyException();
118 if (!self::isCanonical($str)) {
119 throw new NicknameInvalidException();
126 * Is the given string a valid canonical nickname form?
131 public static function isCanonical($str)
133 return preg_match('/^(?:' . self::CANONICAL_FMT . ')$/', $str);
137 class NicknameException extends ClientException
139 function __construct($msg=null, $code=400)
142 $msg = $this->defaultMessage();
144 parent::__construct($msg, $code);
148 * Default localized message for this type of exception.
151 protected function defaultMessage()
157 class NicknameInvalidException extends NicknameException {
159 * Default localized message for this type of exception.
162 protected function defaultMessage()
164 // TRANS: Validation error in form for registration, profile and group settings, etc.
165 return _('Nickname must have only lowercase letters and numbers and no spaces.');
169 class NicknameEmptyException extends NicknameException
172 * Default localized message for this type of exception.
175 protected function defaultMessage()
177 // TRANS: Validation error in form for registration, profile and group settings, etc.
178 return _('Nickname cannot be empty.');
182 class NicknameTooLongException extends NicknameInvalidException
185 * Default localized message for this type of exception.
188 protected function defaultMessage()
190 // TRANS: Validation error in form for registration, profile and group settings, etc.
191 return sprintf(_m('Nickname cannot be more than %d character long.',
192 'Nickname cannot be more than %d characters long.',