Math Captcha - Version 1.2.0

Version Description

  • Tweak: Added option to reset settings to defaults
  • Tweak: Code rewritten to singleton design pattern
  • Fix: Contact Form 7 compatibility issues
  • New: Option to donate this plugin :)
Download this release

Release Info

Developer dfactory
Plugin Icon 128x128 Math Captcha
Version 1.2.0
Comparing to
See all releases

Code changes from version 1.1.1 to 1.2.0

Files changed (15) hide show
  1. css/admin.css +2 -0
  2. css/{front.css → frontend.css} +0 -0
  3. includes/class-cookie-session.php +62 -0
  4. includes/class-core.php +763 -0
  5. includes/class-settings.php +387 -0
  6. includes/class-update.php +43 -0
  7. includes/integration-cf7.php +176 -0
  8. includes/math-captcha-cf7.php +30 -35
  9. js/admin-settings.js +7 -0
  10. js/admin.js +0 -4
  11. languages/math-captcha-pl_PL.mo +0 -0
  12. languages/math-captcha-pl_PL.po +698 -691
  13. languages/math-captcha.pot +154 -140
  14. readme.txt +12 -4
  15. wp-math-captcha.php +104 -1222
css/admin.css CHANGED
@@ -4,6 +4,8 @@
4
  .df-credits h3 { font-size: 14px; line-height: 1.4; margin: 0; padding: 8px 12px; border-bottom: 1px solid #eee; }
5
  .df-credits .df-link { font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif; font-style:italic; padding-bottom: 10px; margin: 0; }
6
  .df-credits .df-link a { vertical-align: middle; padding: 5px 0 0 4px; }
 
 
7
  .math-captcha-settings { margin-right: 300px; }
8
  .math-captcha-settings hr, .df-credits hr { border: solid #eee; border-width: 1px 0 0; clear: both; height: 0; }
9
  .math-captcha-settings form { float: left; min-width: 463px; width: auto; }
4
  .df-credits h3 { font-size: 14px; line-height: 1.4; margin: 0; padding: 8px 12px; border-bottom: 1px solid #eee; }
5
  .df-credits .df-link { font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif; font-style:italic; padding-bottom: 10px; margin: 0; }
6
  .df-credits .df-link a { vertical-align: middle; padding: 5px 0 0 4px; }
7
+ .math-captcha-settings .df-credits form { min-width: 260px; margin-bottom: 1em; }
8
+ .math-captcha-settings .df-credits form input { margin: 0; padding: 0; }
9
  .math-captcha-settings { margin-right: 300px; }
10
  .math-captcha-settings hr, .df-credits hr { border: solid #eee; border-width: 1px 0 0; clear: both; height: 0; }
11
  .math-captcha-settings form { float: left; min-width: 463px; width: auto; }
css/{front.css → frontend.css} RENAMED
File without changes
includes/class-cookie-session.php ADDED
@@ -0,0 +1,62 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ <?php
2
+ if(!defined('ABSPATH')) exit;
3
+
4
+ new Math_Captcha_Cookie_Session();
5
+
6
+ class Math_Captcha_Cookie_Session
7
+ {
8
+ public $session_ids;
9
+
10
+
11
+ public function __construct()
12
+ {
13
+ // sets instance
14
+ Math_Captcha()->cookie_session = $this;
15
+
16
+ // actions
17
+ add_action('plugins_loaded', array(&$this, 'init_session'), 1);
18
+ }
19
+
20
+
21
+ /**
22
+ * Initializes cookie-session
23
+ */
24
+ public function init_session()
25
+ {
26
+ if(is_admin())
27
+ return;
28
+
29
+ if(isset($_COOKIE['mc_session_ids']))
30
+ $this->session_ids = $_COOKIE['mc_session_ids'];
31
+ else
32
+ {
33
+ foreach(array('default', 'multi') as $place)
34
+ {
35
+ switch($place)
36
+ {
37
+ case 'multi':
38
+ for($i = 0; $i < 5; $i++)
39
+ {
40
+ $this->session_ids[$place][$i] = sha1(wp_generate_password(64, false, false));
41
+ }
42
+ break;
43
+
44
+ case 'default':
45
+ $this->session_ids[$place] = sha1(wp_generate_password(64, false, false));
46
+ break;
47
+ }
48
+ }
49
+ }
50
+
51
+ if(!isset($_COOKIE['mc_session_ids']))
52
+ {
53
+ setcookie('mc_session_ids[default]', $this->session_ids['default'], current_time('timestamp', true) + apply_filters('math_captcha_time', Math_Captcha()->options['general']['time']), COOKIEPATH, COOKIE_DOMAIN, (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' ? true : false), true);
54
+
55
+ for($i = 0; $i < 5; $i++)
56
+ {
57
+ setcookie('mc_session_ids[multi]['.$i.']', $this->session_ids['multi'][$i], current_time('timestamp', true) + apply_filters('math_captcha_time', Math_Captcha()->options['general']['time']), COOKIEPATH, COOKIE_DOMAIN);
58
+ }
59
+ }
60
+ }
61
+ }
62
+ ?>
includes/class-core.php ADDED
@@ -0,0 +1,763 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ <?php
2
+ if(!defined('ABSPATH')) exit;
3
+
4
+ new Math_Captcha_Core();
5
+
6
+ class Math_Captcha_Core
7
+ {
8
+ public $session_number = 0;
9
+ public $login_failed = false;
10
+ public $error_messages;
11
+ public $errors;
12
+
13
+
14
+ /**
15
+ *
16
+ */
17
+ public function __construct()
18
+ {
19
+ // sets instance
20
+ Math_Captcha()->core = $this;
21
+
22
+ // actions
23
+ add_action('init', array(&$this, 'load_actions_filters'), 1);
24
+ add_action('plugins_loaded', array(&$this, 'load_defaults'));
25
+ add_action('admin_init', array(&$this, 'flush_rewrites'));
26
+
27
+ // filters
28
+ add_filter('shake_error_codes', array(&$this, 'add_shake_error_codes'), 1);
29
+ add_filter('mod_rewrite_rules', array(&$this, 'block_direct_comments'));
30
+ }
31
+
32
+
33
+ /**
34
+ * Load defaults
35
+ */
36
+ public function load_defaults()
37
+ {
38
+ $this->error_messages = array(
39
+ 'fill' => '<strong>'. __('ERROR', 'math-captcha').'</strong>: '.__('Please enter captcha value.', 'math-captcha'),
40
+ 'wrong' => '<strong>'. __('ERROR', 'math-captcha').'</strong>: '.__('Invalid captcha value.', 'math-captcha'),
41
+ 'time' => '<strong>'. __('ERROR', 'math-captcha').'</strong>: '.__('Captcha time expired.', 'math-captcha')
42
+ );
43
+ }
44
+
45
+
46
+ /**
47
+ * Loads required filters
48
+ */
49
+ public function load_actions_filters()
50
+ {
51
+ // Contact Form 7
52
+ if(Math_Captcha()->options['general']['enable_for']['contact_form_7'] && class_exists('WPCF7_ContactForm'))
53
+ include_once(MATH_CAPTCHA_PATH.'includes/integration-cf7.php');
54
+
55
+ if(is_admin())
56
+ return;
57
+
58
+ $action = (isset($_GET['action']) && $_GET['action'] !== '' ? $_GET['action'] : null);
59
+
60
+ // comments
61
+ if(Math_Captcha()->options['general']['enable_for']['comment_form'])
62
+ {
63
+ if(!is_user_logged_in())
64
+ add_action('comment_form_after_fields', array(&$this, 'add_captcha_form'));
65
+ elseif(!Math_Captcha()->options['general']['hide_for_logged_users'])
66
+ add_action('comment_form_logged_in_after', array(&$this, 'add_captcha_form'));
67
+
68
+ add_filter('preprocess_comment', array(&$this, 'add_comment_with_captcha'));
69
+ }
70
+
71
+ // registration
72
+ if(Math_Captcha()->options['general']['enable_for']['registration_form'] && (!is_user_logged_in() || (is_user_logged_in() && !Math_Captcha()->options['general']['hide_for_logged_users'])) && $action === 'register')
73
+ {
74
+ add_action('register_form', array(&$this, 'add_captcha_form'));
75
+ add_action('register_post', array(&$this, 'add_user_with_captcha'), 10, 3);
76
+ add_action('signup_extra_fields', array(&$this, 'add_captcha_form'));
77
+ add_filter('wpmu_validate_user_signup', array(&$this, 'validate_user_with_captcha'));
78
+ }
79
+
80
+ // lost password
81
+ if(Math_Captcha()->options['general']['enable_for']['reset_password_form'] && (!is_user_logged_in() || (is_user_logged_in() && !Math_Captcha()->options['general']['hide_for_logged_users'])) && $action === 'lostpassword')
82
+ {
83
+ add_action('lostpassword_form', array(&$this, 'add_captcha_form'));
84
+ add_action('lostpassword_post', array(&$this, 'check_lost_password_with_captcha'));
85
+ }
86
+
87
+ // login
88
+ if(Math_Captcha()->options['general']['enable_for']['login_form'] && (!is_user_logged_in() || (is_user_logged_in() && !Math_Captcha()->options['general']['hide_for_logged_users'])) && $action === null)
89
+ {
90
+ add_action('login_form', array(&$this, 'add_captcha_form'));
91
+ add_filter('login_redirect', array(&$this, 'redirect_login_with_captcha'), 10, 3);
92
+ add_filter('authenticate', array(&$this, 'authenticate_user'), 1000, 3);
93
+ }
94
+
95
+ // bbPress
96
+ if(Math_Captcha()->options['general']['enable_for']['bbpress'] && class_exists('bbPress') && (!is_user_logged_in() || (is_user_logged_in() && !Math_Captcha()->options['general']['hide_for_logged_users'])))
97
+ {
98
+ add_action('bbp_theme_after_reply_form_content', array(&$this, 'add_bbp_captcha_form'));
99
+ add_action('bbp_theme_after_topic_form_content', array(&$this, 'add_bbp_captcha_form'));
100
+ add_action('bbp_new_reply_pre_extras', array(&$this, 'check_bbpress_captcha'));
101
+ add_action('bbp_new_topic_pre_extras', array(&$this, 'check_bbpress_captcha'));
102
+ }
103
+ }
104
+
105
+
106
+ /**
107
+ * Adds lost password errors
108
+ */
109
+ public function add_lostpassword_captcha_message($errors)
110
+ {
111
+ return $errors.$this->errors->errors['math-captcha-error'][0];
112
+ }
113
+
114
+
115
+ /**
116
+ * Adds lost password errors (special way)
117
+ */
118
+ public function add_lostpassword_wp_message()
119
+ {
120
+ return $this->errors;
121
+ }
122
+
123
+
124
+ /**
125
+ * Validates lost password form
126
+ */
127
+ public function check_lost_password_with_captcha()
128
+ {
129
+ $this->errors = new WP_Error();
130
+ $user_error = false;
131
+ $user_data = null;
132
+
133
+ // checks captcha
134
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
135
+ {
136
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
137
+ {
138
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
139
+ $this->errors->add('math-captcha-error', $this->error_messages['wrong']);
140
+ }
141
+ else
142
+ $this->errors->add('math-captcha-error', $this->error_messages['time']);
143
+ }
144
+ else
145
+ $this->errors->add('math-captcha-error', $this->error_messages['fill']);
146
+
147
+ // checks user_login (from wp-login.php)
148
+ if(empty($_POST['user_login']))
149
+ $user_error = true;
150
+ elseif(strpos($_POST['user_login'], '@'))
151
+ {
152
+ $user_data = get_user_by('email', trim($_POST['user_login']));
153
+
154
+ if(empty($user_data))
155
+ $user_error = true;
156
+ }
157
+ else
158
+ $user_data = get_user_by('login', trim($_POST['user_login']));
159
+
160
+ if(!$user_data)
161
+ $user_error = true;
162
+
163
+ // something went wrong?
164
+ if(!empty($this->errors->errors))
165
+ {
166
+ // nasty hack (captcha is wrong but user_login is fine)
167
+ if($user_error === false)
168
+ add_filter('allow_password_reset', array(&$this, 'add_lostpassword_wp_message'));
169
+ else
170
+ add_filter('login_errors', array(&$this, 'add_lostpassword_captcha_message'));
171
+ }
172
+ }
173
+
174
+
175
+ /**
176
+ * Validates register form
177
+ */
178
+ public function add_user_with_captcha($login, $email, $errors)
179
+ {
180
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
181
+ {
182
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
183
+ {
184
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
185
+ $errors->add('math-captcha-error', $this->error_messages['wrong']);
186
+ }
187
+ else
188
+ $errors->add('math-captcha-error', $this->error_messages['time']);
189
+ }
190
+ else
191
+ $errors->add('math-captcha-error', $this->error_messages['fill']);
192
+
193
+ return $errors;
194
+ }
195
+
196
+
197
+ /**
198
+ * Validates register form
199
+ */
200
+ public function validate_user_with_captcha($result)
201
+ {
202
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
203
+ {
204
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
205
+ {
206
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
207
+ $results['errors']->add('math-captcha-error', $this->error_messages['wrong']);
208
+ }
209
+ else
210
+ $results['errors']->add('math-captcha-error', $this->error_messages['time']);
211
+ }
212
+ else
213
+ $results['errors']->add('math-captcha-error', $this->error_messages['fill']);
214
+
215
+ return $results;
216
+ }
217
+
218
+
219
+ /**
220
+ * Posts login form
221
+ */
222
+ public function redirect_login_with_captcha($redirect, $bool, $errors)
223
+ {
224
+ if($this->login_failed === false && !empty($_POST))
225
+ {
226
+ $error = '';
227
+
228
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
229
+ {
230
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
231
+ {
232
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
233
+ $error = 'wrong';
234
+ }
235
+ else
236
+ $error = 'time';
237
+ }
238
+ else
239
+ $error = 'fill';
240
+
241
+ if(is_wp_error($errors) && !empty($error))
242
+ $errors->add('math-captcha-error', $this->error_messages[$error]);
243
+ }
244
+
245
+ return $redirect;
246
+ }
247
+
248
+
249
+ /**
250
+ * Authenticate user
251
+ */
252
+ public function authenticate_user($user, $username, $password)
253
+ {
254
+ // user gave us valid login and password
255
+ if(!is_wp_error($user))
256
+ {
257
+ if(!empty($_POST))
258
+ {
259
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
260
+ {
261
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
262
+ {
263
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
264
+ $error = 'wrong';
265
+ }
266
+ else
267
+ $error = 'time';
268
+ }
269
+ else
270
+ $error = 'fill';
271
+ }
272
+
273
+ if(!empty($error))
274
+ {
275
+ // destroy cookie
276
+ wp_clear_auth_cookie();
277
+
278
+ $user = new WP_Error();
279
+ $user->add('math-captcha-error', $this->error_messages[$error]);
280
+
281
+ // inform redirect function that we failed to login
282
+ $this->login_failed = true;
283
+ }
284
+ }
285
+
286
+ return $user;
287
+ }
288
+
289
+
290
+ /**
291
+ * Adds shake
292
+ */
293
+ public function add_shake_error_codes($codes)
294
+ {
295
+ $codes[] = 'math-captcha-error';
296
+
297
+ return $codes;
298
+ }
299
+
300
+
301
+ /**
302
+ * Adds captcha to comment form
303
+ */
304
+ public function add_comment_with_captcha($comment)
305
+ {
306
+ if(isset($_POST['mc-value']) && (!is_admin() || DOING_AJAX) && ($comment['comment_type'] === '' || $comment['comment_type'] === 'comment'))
307
+ {
308
+ if($_POST['mc-value'] !== '')
309
+ {
310
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
311
+ {
312
+ if(strcmp(get_transient('mc_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) === 0)
313
+ return $comment;
314
+ else
315
+ wp_die($this->error_messages['wrong']);
316
+ }
317
+ else
318
+ wp_die($this->error_messages['time']);
319
+ }
320
+ else
321
+ wp_die($this->error_messages['fill']);
322
+ }
323
+ else
324
+ return $comment;
325
+ }
326
+
327
+
328
+ /**
329
+ * Shows and generates captcha
330
+ */
331
+ public function add_captcha_form()
332
+ {
333
+ if(is_admin())
334
+ return;
335
+
336
+ $captcha_title = apply_filters('math_captcha_title', Math_Captcha()->options['general']['title']);
337
+
338
+ echo '
339
+ <p class="math-captcha-form">';
340
+
341
+ if(!empty($captcha_title))
342
+ echo '
343
+ <label>'.$captcha_title.'<br/></label>';
344
+
345
+ echo '
346
+ <span>'.$this->generate_captcha_phrase('default').'</span>
347
+ </p>';
348
+ }
349
+
350
+
351
+ /**
352
+ * Shows and generates captcha for bbPress
353
+ */
354
+ public function add_bbp_captcha_form()
355
+ {
356
+ if(is_admin())
357
+ return;
358
+
359
+ $captcha_title = apply_filters('math_captcha_title', Math_Captcha()->options['general']['title']);
360
+
361
+ echo '
362
+ <p class="math-captcha-form">';
363
+
364
+ if(!empty($captcha_title))
365
+ echo '
366
+ <label>'.$captcha_title.'<br/></label>';
367
+
368
+ echo '
369
+ <span>'.$this->generate_captcha_phrase('bbpress').'</span>
370
+ </p>';
371
+ }
372
+
373
+
374
+ /**
375
+ * Validates bbpress topics and replies
376
+ */
377
+ public function check_bbpress_captcha()
378
+ {
379
+ if(isset($_POST['mc-value']) && $_POST['mc-value'] !== '')
380
+ {
381
+ if(Math_Captcha()->cookie_session->session_ids['default'] !== '' && get_transient('bbp_'.Math_Captcha()->cookie_session->session_ids['default']) !== false)
382
+ {
383
+ if(strcmp(get_transient('bbp_'.Math_Captcha()->cookie_session->session_ids['default']), sha1(AUTH_KEY.$_POST['mc-value'].Math_Captcha()->cookie_session->session_ids['default'], false)) !== 0)
384
+ bbp_add_error('math-captcha-wrong', $this->error_messages['wrong']);
385
+ }
386
+ else
387
+ bbp_add_error('math-captcha-wrong', $this->error_messages['time']);
388
+ }
389
+ else
390
+ bbp_add_error('math-captcha-wrong', $this->error_messages['fill']);
391
+ }
392
+
393
+
394
+ /**
395
+ * Encodes chars
396
+ */
397
+ private function encode_operation($string)
398
+ {
399
+ $chars = str_split($string);
400
+ $seed = mt_rand(0, (int)abs(crc32($string) / strlen($string)));
401
+
402
+ foreach($chars as $key => $char)
403
+ {
404
+ $ord = ord($char);
405
+
406
+ // ignore non-ascii chars
407
+ if($ord < 128)
408
+ {
409
+ // pseudo "random function"
410
+ $r = ($seed * (1 + $key)) % 100;
411
+
412
+ if($r > 60 && $char !== '@') {} // plain character (not encoded), if not @-sign
413
+ elseif($r < 45) $chars[$key] = '&#x'.dechex($ord).';'; // hexadecimal
414
+ else $chars[$key] = '&#'.$ord.';'; // decimal (ascii)
415
+ }
416
+ }
417
+
418
+ return implode('', $chars);
419
+ }
420
+
421
+
422
+ /**
423
+ * Converts numbers to words
424
+ */
425
+ private function numberToWords($number)
426
+ {
427
+ $words = array(
428
+ 1 => __('one', 'math-captcha'),
429
+ 2 => __('two', 'math-captcha'),
430
+ 3 => __('three', 'math-captcha'),
431
+ 4 => __('four', 'math-captcha'),
432
+ 5 => __('five', 'math-captcha'),
433
+ 6 => __('six', 'math-captcha'),
434
+ 7 => __('seven', 'math-captcha'),
435
+ 8 => __('eight', 'math-captcha'),
436
+ 9 => __('nine', 'math-captcha'),
437
+ 10 => __('ten', 'math-captcha'),
438
+ 11 => __('eleven', 'math-captcha'),
439
+ 12 => __('twelve', 'math-captcha'),
440
+ 13 => __('thirteen', 'math-captcha'),
441
+ 14 => __('fourteen', 'math-captcha'),
442
+ 15 => __('fifteen', 'math-captcha'),
443
+ 16 => __('sixteen', 'math-captcha'),
444
+ 17 => __('seventeen', 'math-captcha'),
445
+ 18 => __('eighteen', 'math-captcha'),
446
+ 19 => __('nineteen', 'math-captcha'),
447
+ 20 => __('twenty', 'math-captcha'),
448
+ 30 => __('thirty', 'math-captcha'),
449
+ 40 => __('forty', 'math-captcha'),
450
+ 50 => __('fifty', 'math-captcha'),
451
+ 60 => __('sixty', 'math-captcha'),
452
+ 70 => __('seventy', 'math-captcha'),
453
+ 80 => __('eighty', 'math-captcha'),
454
+ 90 => __('ninety', 'math-captcha')
455
+ );
456
+
457
+ if(isset($words[$number]))
458
+ return $words[$number];
459
+ else
460
+ {
461
+ $reverse = false;
462
+
463
+ switch(get_bloginfo('language'))
464
+ {
465
+ case 'de-DE':
466
+ $spacer = 'und';
467
+ $reverse = true;
468
+ break;
469
+
470
+ case 'nl-NL':
471
+ $spacer = 'en';
472
+ $reverse = true;
473
+ break;
474
+
475
+ case 'ru-RU':
476
+ case 'pl-PL':
477
+ case 'en-EN':
478
+ default:
479
+ $spacer = ' ';
480
+ }
481
+
482
+ $first = (int)(substr($number, 0, 1) * 10);
483
+ $second = (int)substr($number, -1);
484
+
485
+ return ($reverse === false ? $words[$first].$spacer.$words[$second] : $words[$second].$spacer.$words[$first]);
486
+ }
487
+ }
488
+
489
+
490
+ /**
491
+ * Generates captcha
492
+ */
493
+ public function generate_captcha_phrase($form = '')
494
+ {
495
+ $ops = array(
496
+ 'addition' => '+',
497
+ 'subtraction' => '&#8722;',
498
+ 'multiplication' => '&#215;',
499
+ 'division' => '&#247;',
500
+ );
501
+
502
+ $operations = $groups = array();
503
+ $input = '<input type="text" size="2" length="2" id="mc-input" class="mc-input" name="mc-value" value="" aria-required="true"/>';
504
+
505
+ // available operations
506
+ foreach(Math_Captcha()->options['general']['mathematical_operations'] as $operation => $enable)
507
+ {
508
+ if($enable === true)
509
+ $operations[] = $operation;
510
+ }
511
+
512
+ // available groups
513
+ foreach(Math_Captcha()->options['general']['groups'] as $group => $enable)
514
+ {
515
+ if($enable === true)
516
+ $groups[] = $group;
517
+ }
518
+
519
+ // number of groups
520
+ $ao = count($groups);
521
+
522
+ // operation
523
+ $rnd_op = $operations[mt_rand(0, count($operations) - 1)];
524
+ $number[3] = $ops[$rnd_op];
525
+
526
+ // place where to put empty input
527
+ $rnd_input = mt_rand(0, 2);
528
+
529
+ // which random operation
530
+ switch($rnd_op)
531
+ {
532
+ case 'addition':
533
+ if($rnd_input === 0)
534
+ {
535
+ $number[0] = mt_rand(1, 10);
536
+ $number[1] = mt_rand(1, 89);
537
+ }
538
+ elseif($rnd_input === 1)
539
+ {
540
+ $number[0] = mt_rand(1, 89);
541
+ $number[1] = mt_rand(1, 10);
542
+ }
543
+ elseif($rnd_input === 2)
544
+ {
545
+ $number[0] = mt_rand(1, 9);
546
+ $number[1] = mt_rand(1, 10 - $number[0]);
547
+ }
548
+
549
+ $number[2] = $number[0] + $number[1];
550
+ break;
551
+
552
+ case 'subtraction':
553
+ if($rnd_input === 0)
554
+ {
555
+ $number[0] = mt_rand(2, 10);
556
+ $number[1] = mt_rand(1, $number[0] - 1);
557
+ }
558
+ elseif($rnd_input === 1)
559
+ {
560
+ $number[0] = mt_rand(11, 99);
561
+ $number[1] = mt_rand(1, 10);
562
+ }
563
+ elseif($rnd_input === 2)
564
+ {
565
+ $number[0] = mt_rand(11, 99);
566
+ $number[1] = mt_rand($number[0] - 10, $number[0] - 1);
567
+ }
568
+
569
+ $number[2] = $number[0] - $number[1];
570
+ break;
571
+
572
+ case 'multiplication':
573
+ if($rnd_input === 0)
574
+ {
575
+ $number[0] = mt_rand(1, 10);
576
+ $number[1] = mt_rand(1, 9);
577
+ }
578
+ elseif($rnd_input === 1)
579
+ {
580
+ $number[0] = mt_rand(1, 9);
581
+ $number[1] = mt_rand(1, 10);
582
+ }
583
+ elseif($rnd_input === 2)
584
+ {
585
+ $number[0] = mt_rand(1, 10);
586
+ $number[1] = ($number[0] > 5 ? 1 : ($number[0] === 4 && $number[0] === 5 ? mt_rand(1, 2) : ($number[0] === 3 ? mt_rand(1, 3) : ($number[0] === 2 ? mt_rand(1, 5) : mt_rand(1, 10)))));
587
+ }
588
+
589
+ $number[2] = $number[0] * $number[1];
590
+ break;
591
+
592
+ case 'division':
593
+ $divide = array(1 => 99, 2 => 49, 3 => 33, 4 => 24, 5 => 19, 6 => 16, 7 => 14, 8 => 12, 9 => 11, 10 => 9);
594
+
595
+ if($rnd_input === 0)
596
+ {
597
+ $divide = array(2 => array(1, 2), 3 => array(1, 3), 4 => array(1, 2, 4), 5 => array(1, 5), 6 => array(1, 2, 3, 6), 7 => array(1, 7), 8 => array(1, 2, 4, 8), 9 => array(1, 3, 9), 10 => array(1, 2, 5, 10));
598
+ $number[0] = mt_rand(2, 10);
599
+ $number[1] = $divide[$number[0]][mt_rand(0, count($divide[$number[0]]) - 1)];
600
+ }
601
+ elseif($rnd_input === 1)
602
+ {
603
+ $number[1] = mt_rand(1, 10);
604
+ $number[0] = $number[1] * mt_rand(1, $divide[$number[1]]);
605
+ }
606
+ elseif($rnd_input === 2)
607
+ {
608
+ $number[2] = mt_rand(1, 10);
609
+ $number[0] = $number[2] * mt_rand(1, $divide[$number[2]]);
610
+ $number[1] = (int)($number[0] / $number[2]);
611
+ }
612
+
613
+ if(!isset($number[2]))
614
+ $number[2] = (int)($number[0] / $number[1]);
615
+
616
+ break;
617
+ }
618
+
619
+ // words
620
+ if($ao === 1 && $groups[0] === 'words')
621
+ {
622
+ if($rnd_input === 0)
623
+ {
624
+ $number[1] = $this->numberToWords($number[1]);
625
+ $number[2] = $this->numberToWords($number[2]);
626
+ }
627
+ elseif($rnd_input === 1)
628
+ {
629
+ $number[0] = $this->numberToWords($number[0]);
630
+ $number[2] = $this->numberToWords($number[2]);
631
+ }
632
+ elseif($rnd_input === 2)
633
+ {
634
+ $number[0] = $this->numberToWords($number[0]);
635
+ $number[1] = $this->numberToWords($number[1]);
636
+ }
637
+ }
638
+ // numbers and words
639
+ elseif($ao === 2)
640
+ {
641
+ if($rnd_input === 0)
642
+ {
643
+ if(mt_rand(1, 2) === 2)
644
+ {
645
+ $number[1] = $this->numberToWords($number[1]);
646
+ $number[2] = $this->numberToWords($number[2]);
647
+ }
648
+ else
649
+ $number[$tmp = mt_rand(1, 2)] = $this->numberToWords($number[$tmp]);
650
+ }
651
+ elseif($rnd_input === 1)
652
+ {
653
+ if(mt_rand(1, 2) === 2)
654
+ {
655
+ $number[0] = $this->numberToWords($number[0]);
656
+ $number[2] = $this->numberToWords($number[2]);
657
+ }
658
+ else
659
+ $number[$tmp = array_rand(array(0 => 0, 2 => 2), 1)] = $this->numberToWords($number[$tmp]);
660
+ }
661
+ elseif($rnd_input === 2)
662
+ {
663
+ if(mt_rand(1, 2) === 2)
664
+ {
665
+ $number[0] = $this->numberToWords($number[0]);
666
+ $number[1] = $this->numberToWords($number[1]);
667
+ }
668
+ else
669
+ $number[$tmp = mt_rand(0, 1)] = $this->numberToWords($number[$tmp]);
670
+ }
671
+ }
672
+
673
+ if(in_array($form, array('default', 'bbpress'), true))
674
+ {
675
+ // position of empty input
676
+ if($rnd_input === 0)
677
+ $return = $input.' '.$number[3].' '.$this->encode_operation($number[1]).' = '.$this->encode_operation($number[2]);
678
+ elseif($rnd_input === 1)
679
+ $return = $this->encode_operation($number[0]).' '.$number[3].' '.$input.' = '.$this->encode_operation($number[2]);
680
+ elseif($rnd_input === 2)
681
+ $return = $this->encode_operation($number[0]).' '.$number[3].' '.$this->encode_operation($number[1]).' = '.$input;
682
+
683
+ $transient_name = ($form === 'bbpress' ? 'bbp' : 'mc');
684
+ $session_id = Math_Captcha()->cookie_session->session_ids['default'];
685
+ }
686
+ elseif($form === 'cf7')
687
+ {
688
+ $return = array();
689
+
690
+ if($rnd_input === 0)
691
+ {
692
+ $return['input'] = 1;
693
+ $return[2] = ' '.$number[3].' '.$this->encode_operation($number[1]).' = ';
694
+ $return[3] = $this->encode_operation($number[2]);
695
+ }
696
+ elseif($rnd_input === 1)
697
+ {
698
+ $return[1] = $this->encode_operation($number[0]).' '.$number[3].' ';
699
+ $return['input'] = 2;
700
+ $return[3] = ' = '.$this->encode_operation($number[2]);
701
+ }
702
+ elseif($rnd_input === 2)
703
+ {
704
+ $return[1] = $this->encode_operation($number[0]).' '.$number[3].' ';
705
+ $return[2] = $this->encode_operation($number[1]).' = ';
706
+ $return['input'] = 3;
707
+ }
708
+
709
+ $transient_name = 'cf7';
710
+ $session_id = Math_Captcha()->cookie_session->session_ids['multi'][$this->session_number++];
711
+ }
712
+
713
+ set_transient($transient_name.'_'.$session_id, sha1(AUTH_KEY.$number[$rnd_input].$session_id, false), apply_filters('math_captcha_time', Math_Captcha()->options['general']['time']));
714
+
715
+ return $return;
716
+ }
717
+
718
+
719
+ /**
720
+ *
721
+ */
722
+ public function flush_rewrites()
723
+ {
724
+ if(Math_Captcha()->options['general']['flush_rules'])
725
+ {
726
+ global $wp_rewrite;
727
+
728
+ $wp_rewrite->flush_rules();
729
+
730
+ Math_Captcha()->options['general']['flush_rules'] = false;
731
+ update_option('math_captcha_options', Math_Captcha()->options['general']);
732
+ }
733
+ }
734
+
735
+
736
+ /**
737
+ *
738
+ */
739
+ public function block_direct_comments($rules)
740
+ {
741
+ if(Math_Captcha()->options['general']['block_direct_comments'])
742
+ {
743
+ $new_rules =
744
+ <<<EOT
745
+ \n# BEGIN Math Captcha
746
+ <IfModule mod_rewrite.c>
747
+ RewriteEngine On
748
+ RewriteCond %{REQUEST_METHOD} POST
749
+ RewriteCond %{REQUEST_URI} .wp-comments-post.php*
750
+ RewriteCond %{HTTP_REFERER} !.*{$_SERVER['HTTP_HOST']}.* [OR]
751
+ RewriteCond %{HTTP_USER_AGENT} ^$
752
+ RewriteRule (.*) ^http://%{REMOTE_ADDR}/$ [R=301,L]
753
+ </IfModule>
754
+ # END Math Captcha\n\n
755
+ EOT;
756
+
757
+ return $new_rules.$rules;
758
+ }
759
+
760
+ return $rules;
761
+ }
762
+ }
763
+ ?>
includes/class-settings.php ADDED
@@ -0,0 +1,387 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ <?php
2
+ if(!defined('ABSPATH')) exit;
3
+
4
+ new Math_Captcha_Settings();
5
+
6
+ class Math_Captcha_Settings
7
+ {
8
+ public $mathematical_operations;
9
+ public $groups;
10
+ public $forms;
11
+
12
+
13
+ /**
14
+ *
15
+ */
16
+ public function __construct()
17
+ {
18
+ // actions
19
+ add_action('init', array(&$this, 'load_defaults'));
20
+ add_action('admin_init', array(&$this, 'register_settings'));
21
+ add_action('admin_menu', array(&$this, 'admin_menu_options'));
22
+ }
23
+
24
+
25
+ /**
26
+ *
27
+ */
28
+ public function load_defaults()
29
+ {
30
+ if(!is_admin())
31
+ return;
32
+
33
+ $this->forms = array(
34
+ 'login_form' => __('login form', 'math-captcha'),
35
+ 'registration_form' => __('registration form', 'math-captcha'),
36
+ 'reset_password_form' => __('reset password form', 'math-captcha'),
37
+ 'comment_form' => __('comment form', 'math-captcha'),
38
+ 'bbpress' => __('bbpress', 'math-captcha'),
39
+ 'contact_form_7' => __('contact form 7', 'math-captcha')
40
+ );
41
+
42
+ $this->mathematical_operations = array(
43
+ 'addition' => __('addition (+)', 'math-captcha'),
44
+ 'subtraction' => __('subtraction (-)', 'math-captcha'),
45
+ 'multiplication' => __('multiplication (&#215;)', 'math-captcha'),
46
+ 'division' => __('division (&#247;)', 'math-captcha')
47
+ );
48
+
49
+ $this->groups = array(
50
+ 'numbers' => __('numbers', 'math-captcha'),
51
+ 'words' => __('words', 'math-captcha')
52
+ );
53
+ }
54
+
55
+
56
+ /**
57
+ * Adds options menu
58
+ */
59
+ public function admin_menu_options()
60
+ {
61
+ add_options_page(
62
+ __('Math Captcha', 'math-captcha'),
63
+ __('Math Captcha', 'math-captcha'),
64
+ 'manage_options',
65
+ 'math-captcha',
66
+ array(&$this, 'options_page')
67
+ );
68
+ }
69
+
70
+
71
+ /**
72
+ * Shows options page
73
+ */
74
+ public function options_page()
75
+ {
76
+ echo '
77
+ <div class="wrap">
78
+ <h2>'.__('Math Captcha', 'math-captcha').'</h2>
79
+ <div class="math-captcha-settings">
80
+ <div class="df-credits">
81
+ <h3 class="hndle">'.__('Math Captcha', 'math-captcha').' '.Math_Captcha()->defaults['version'].'</h3>
82
+ <div class="inside">
83
+ <h4 class="inner">'.__('Need support?', 'math-captcha').'</h4>
84
+ <p class="inner">'.__('If you are having problems with this plugin, please talk about them in the', 'math-captcha').' <a href="http://www.dfactory.eu/support/?utm_source=math-captcha-settings&utm_medium=link&utm_campaign=support" target="_blank" title="'.__('Support forum','math-captcha').'">'.__('Support forum', 'math-captcha').'</a></p>
85
+ <hr/>
86
+ <h4 class="inner">'.__('Do you like this plugin?', 'math-captcha').'</h4>
87
+ <p class="inner"><a href="http://wordpress.org/support/view/plugin-reviews/wp-math-captcha" target="_blank" title="'.__('Rate it 5', 'math-captcha').'">'.__('Rate it 5', 'math-captcha').'</a> '.__('on WordPress.org', 'math-captcha').'<br/>'.
88
+ __('Blog about it & link to the', 'math-captcha').' <a href="http://www.dfactory.eu/plugins/math-captcha/?utm_source=math-captcha-settings&utm_medium=link&utm_campaign=blog-about" target="_blank" title="'.__('plugin page', 'math-captcha').'">'.__('plugin page', 'math-captcha').'</a><br/>'.
89
+ __('Check out our other', 'math-captcha').' <a href="http://www.dfactory.eu/plugins/?utm_source=math-captcha-settings&utm_medium=link&utm_campaign=other-plugins" target="_blank" title="'.__('WordPress plugins', 'math-captcha').'">'.__('WordPress plugins', 'math-captcha').'</a>
90
+ </p>
91
+ <form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_blank" class="inner">
92
+ <input type="hidden" name="cmd" value="_s-xclick">
93
+ <input type="hidden" name="hosted_button_id" value="BJSHR9GS5QJTC">
94
+ <input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
95
+ <img alt="" border="0" src="https://www.paypalobjects.com/pl_PL/i/scr/pixel.gif" width="1" height="1">
96
+ </form>
97
+ <hr/>
98
+ <p class="df-link inner">Created by <a href="http://www.dfactory.eu/?utm_source=math-captcha-settings&utm_medium=link&utm_campaign=created-by" target="_blank" title="dFactory - Quality plugins for WordPress"><img src="'.DOWNLOAD_ATTACHMENTS_URL.'/images/logo-dfactory.png" title="dFactory - Quality plugins for WordPress" alt="dFactory - Quality plugins for WordPress"/></a></p>
99
+ </div>
100
+ </div>
101
+ <form action="options.php" method="post">';
102
+
103
+ wp_nonce_field('update-options');
104
+ settings_fields('math_captcha_options');
105
+ do_settings_sections('math_captcha_options');
106
+
107
+ echo '
108
+ <p class="submit">';
109
+
110
+ submit_button('', 'primary', 'save_mc_general', false);
111
+
112
+ echo ' ';
113
+
114
+ submit_button(__('Reset to defaults', 'math-captcha'), 'secondary reset_mc_settings', 'reset_mc_general', false);
115
+
116
+ echo '
117
+ </p>
118
+ </form>
119
+ </div>
120
+ <div class="clear"></div>
121
+ </div>';
122
+ }
123
+
124
+
125
+ /**
126
+ *
127
+ */
128
+ public function register_settings()
129
+ {
130
+ // general settings
131
+ register_setting('math_captcha_options', 'math_captcha_options', array(&$this, 'validate_settings'));
132
+ add_settings_section('math_captcha_settings', __('Math Captcha settings', 'math-captcha'), '', 'math_captcha_options');
133
+ add_settings_field('mc_general_enable_captcha_for', __('Enable Math Captcha for', 'math-captcha'), array(&$this, 'mc_general_enable_captcha_for'), 'math_captcha_options', 'math_captcha_settings');
134
+ add_settings_field('mc_general_hide_for_logged_users', __('Hide for logged in users', 'math-captcha'), array(&$this, 'mc_general_hide_for_logged_users'), 'math_captcha_options', 'math_captcha_settings');
135
+ add_settings_field('mc_general_mathematical_operations', __('Mathematical operations', 'math-captcha'), array(&$this, 'mc_general_mathematical_operations'), 'math_captcha_options', 'math_captcha_settings');
136
+ add_settings_field('mc_general_groups', __('Display captcha as', 'math-captcha'), array(&$this, 'mc_general_groups'), 'math_captcha_options', 'math_captcha_settings');
137
+ add_settings_field('mc_general_title', __('Captcha field title', 'math-captcha'), array(&$this, 'mc_general_title'), 'math_captcha_options', 'math_captcha_settings');
138
+ add_settings_field('mc_general_time', __('Captcha time', 'math-captcha'), array(&$this, 'mc_general_time'), 'math_captcha_options', 'math_captcha_settings');
139
+ add_settings_field('mc_general_block_direct_comments', __('Block Direct Comments', 'math-captcha'), array(&$this, 'mc_general_block_direct_comments'), 'math_captcha_options', 'math_captcha_settings');
140
+ add_settings_field('mc_general_deactivation_delete', __('Deactivation', 'math-captcha'), array(&$this, 'mc_general_deactivation_delete'), 'math_captcha_options', 'math_captcha_settings');
141
+ }
142
+
143
+
144
+ /**
145
+ *
146
+ */
147
+ public function mc_general_enable_captcha_for()
148
+ {
149
+ echo '
150
+ <div id="mc_general_enable_captcha_for">
151
+ <fieldset>';
152
+
153
+ foreach($this->forms as $val => $trans)
154
+ {
155
+ echo '
156
+ <input id="mc-general-enable-captcha-for-'.$val.'" type="checkbox" name="math_captcha_options[enable_for][]" value="'.$val.'" '.checked(true, Math_Captcha()->options['general']['enable_for'][$val], false).' '.disabled((($val === 'contact_form_7' && !class_exists('WPCF7_ContactForm')) || ($val === 'bbpress' && !class_exists('bbPress'))), true, false).'/><label for="mc-general-enable-captcha-for-'.$val.'">'.esc_html($trans).'</label>';
157
+ }
158
+
159
+ echo '
160
+ <br/>
161
+ <span class="description">'.__('Select where you\'d like to use Math Captcha.', 'math-captcha').'</span>
162
+ </fieldset>
163
+ </div>';
164
+ }
165
+
166
+
167
+ /**
168
+ *
169
+ */
170
+ public function mc_general_hide_for_logged_users()
171
+ {
172
+ echo '
173
+ <div id="mc_general_hide_for_logged_users">
174
+ <fieldset>
175
+ <input id="mc-general-hide-for-logged" type="checkbox" name="math_captcha_options[hide_for_logged_users]" '.checked(true, Math_Captcha()->options['general']['hide_for_logged_users'], false).'/><label for="mc-general-hide-for-logged">'.__('Enable to hide captcha for logged in users.', 'math-captcha').'</label>
176
+ </fieldset>
177
+ </div>';
178
+ }
179
+
180
+
181
+ /**
182
+ *
183
+ */
184
+ public function mc_general_mathematical_operations()
185
+ {
186
+ echo '
187
+ <div id="mc_general_mathematical_operations">
188
+ <fieldset>';
189
+
190
+ foreach($this->mathematical_operations as $val => $trans)
191
+ {
192
+ echo '
193
+ <input id="mc-general-mathematical-operations-'.$val.'" type="checkbox" name="math_captcha_options[mathematical_operations][]" value="'.$val.'" '.checked(true, Math_Captcha()->options['general']['mathematical_operations'][$val], false).'/><label for="mc-general-mathematical-operations-'.$val.'">'.esc_html($trans).'</label>';
194
+ }
195
+
196
+ echo '
197
+ <br/>
198
+ <span class="description">'.__('Select which mathematical operations to use in your captcha.', 'math-captcha').'</span>
199
+ </fieldset>
200
+ </div>';
201
+ }
202
+
203
+
204
+ /**
205
+ *
206
+ */
207
+ public function mc_general_groups()
208
+ {
209
+ echo '
210
+ <div id="mc_general_groups">
211
+ <fieldset>';
212
+
213
+ foreach($this->groups as $val => $trans)
214
+ {
215
+ echo '
216
+ <input id="mc-general-groups-'.$val.'" type="checkbox" name="math_captcha_options[groups][]" value="'.$val.'" '.checked(true, Math_Captcha()->options['general']['groups'][$val], false).'/><label for="mc-general-groups-'.$val.'">'.esc_html($trans).'</label>';
217
+ }
218
+
219
+ echo '
220
+ <br/>
221
+ <span class="description">'.__('Select how you\'d like to display you captcha.', 'math-captcha').'</span>
222
+ </fieldset>
223
+ </div>';
224
+ }
225
+
226
+
227
+ /**
228
+ *
229
+ */
230
+ public function mc_general_title()
231
+ {
232
+ echo '
233
+ <div id="mc_general_title">
234
+ <fieldset>
235
+ <input type="text" name="math_captcha_options[title]" value="'.Math_Captcha()->options['general']['title'].'"/>
236
+ <br/>
237
+ <span class="description">'.__('How to entitle field with captcha?', 'math-captcha').'</span>
238
+ </fieldset>
239
+ </div>';
240
+ }
241
+
242
+
243
+ /**
244
+ *
245
+ */
246
+ public function mc_general_time()
247
+ {
248
+ echo '
249
+ <div id="mc_general_time">
250
+ <fieldset>
251
+ <input type="text" name="math_captcha_options[time]" value="'.Math_Captcha()->options['general']['time'].'"/>
252
+ <br/>
253
+ <span class="description">'.__('Enter the time (in seconds) a user has to enter captcha value.', 'math-captcha').'</span>
254
+ </fieldset>
255
+ </div>';
256
+ }
257
+
258
+
259
+ /**
260
+ *
261
+ */
262
+ public function mc_general_block_direct_comments()
263
+ {
264
+ echo '
265
+ <div id="mc_general_block_direct_comments">
266
+ <fieldset>
267
+ <input id="mc-general-block-direct-comments" type="checkbox" name="math_captcha_options[block_direct_comments]" '.checked(true, Math_Captcha()->options['general']['block_direct_comments'], false).'/><label for="mc-general-block-direct-comments">'.__('Blocks direct access to wp-comments-post.php. Enable this to prevent spambots from posting to Wordpress via a URL.', 'math-captcha').'</label>
268
+ </fieldset>
269
+ </div>';
270
+ }
271
+
272
+
273
+ /**
274
+ *
275
+ */
276
+ public function mc_general_deactivation_delete()
277
+ {
278
+ echo '
279
+ <div id="mc_general_deactivation_delete">
280
+ <fieldset>
281
+ <input id="mc-general-deactivation-delete" type="checkbox" name="math_captcha_options[deactivation_delete]" '.checked(true, Math_Captcha()->options['general']['deactivation_delete'], false).'/><label for="mc-general-deactivation-delete">'.__('Delete settings on plugin deactivation.', 'math-captcha').'</label>
282
+ </fieldset>
283
+ </div>';
284
+ }
285
+
286
+
287
+ /**
288
+ * Validates settings
289
+ */
290
+ public function validate_settings($input)
291
+ {
292
+ if(isset($_POST['save_mc_general']))
293
+ {
294
+ // enable captcha forms
295
+ $enable_for = array();
296
+
297
+ if(empty($input['enable_for']))
298
+ {
299
+ foreach(Math_Captcha()->defaults['general']['enable_for'] as $enable => $bool)
300
+ {
301
+ $input['enable_for'][$enable] = false;
302
+ }
303
+ }
304
+ else
305
+ {
306
+ foreach($this->forms as $enable => $trans)
307
+ {
308
+ $enable_for[$enable] = (in_array($enable, $input['enable_for']) ? true : false);
309
+ }
310
+
311
+ $input['enable_for'] = $enable_for;
312
+ }
313
+
314
+ if(!class_exists('WPCF7_ContactForm') && Math_Captcha()->options['general']['enable_for']['contact_form_7'])
315
+ $input['enable_for']['contact_form_7'] = true;
316
+
317
+ if(!class_exists('bbPress') && Math_Captcha()->options['general']['enable_for']['bbpress'])
318
+ $input['enable_for']['bbpress'] = true;
319
+
320
+ // enable mathematical operations
321
+ $mathematical_operations = array();
322
+
323
+ if(empty($input['mathematical_operations']))
324
+ {
325
+ add_settings_error('empty-operations', 'settings_updated', __('You need to check at least one mathematical operation. Defaults settings of this option restored.', 'math-captcha'), 'error');
326
+
327
+ $input['mathematical_operations'] = Math_Captcha()->defaults['general']['mathematical_operations'];
328
+ }
329
+ else
330
+ {
331
+ foreach($this->mathematical_operations as $operation => $trans)
332
+ {
333
+ $mathematical_operations[$operation] = (in_array($operation, $input['mathematical_operations']) ? true : false);
334
+ }
335
+
336
+ $input['mathematical_operations'] = $mathematical_operations;
337
+ }
338
+
339
+ // enable groups
340
+ $groups = array();
341
+
342
+ if(empty($input['groups']))
343
+ {
344
+ add_settings_error('empty-groups', 'settings_updated', __('You need to check at least one group. Defaults settings of this option restored.', 'math-captcha'), 'error');
345
+
346
+ $input['groups'] = Math_Captcha()->defaults['general']['groups'];
347
+ }
348
+ else
349
+ {
350
+ foreach($this->groups as $group => $trans)
351
+ {
352
+ $groups[$group] = (in_array($group, $input['groups']) ? true : false);
353
+ }
354
+
355
+ $input['groups'] = $groups;
356
+ }
357
+
358
+ // hide for logged in users
359
+ $input['hide_for_logged_users'] = isset($input['hide_for_logged_users']);
360
+
361
+ // block direct comments access
362
+ $input['block_direct_comments'] = isset($input['block_direct_comments']);
363
+
364
+ // deactivation delete
365
+ $input['deactivation_delete'] = isset($input['deactivation_delete']);
366
+
367
+ // captcha title
368
+ $input['title'] = trim($input['title']);
369
+
370
+ // captcha time
371
+ $time = (int)$input['time'];
372
+ $input['time'] = ($time < 0 ? Math_Captcha()->defaults['general']['time'] : $time);
373
+
374
+ // flush rules
375
+ $input['flush_rules'] = true;
376
+ }
377
+ elseif(isset($_POST['reset_mc_general']))
378
+ {
379
+ $input = Math_Captcha()->defaults['general'];
380
+
381
+ add_settings_error('settings', 'settings_reset', __('Settings restored to defaults.', 'math-captcha'), 'updated');
382
+ }
383
+
384
+ return $input;
385
+ }
386
+ }
387
+ ?>
includes/class-update.php ADDED
@@ -0,0 +1,43 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ <?php
2
+ if(!defined('ABSPATH')) exit;
3
+
4
+ new Math_Captcha_Update();
5
+
6
+ class Math_Captcha_Update
7
+ {
8
+ /**
9
+ *
10
+ */
11
+ public function __construct()
12
+ {
13
+ // actions
14
+ add_action('init', array(&$this, 'check_update'));
15
+ }
16
+
17
+
18
+ /**
19
+ *
20
+ */
21
+ public function check_update()
22
+ {
23
+ if(!is_admin() || !current_user_can('manage_options'))
24
+ return;
25
+
26
+ // gets current database version
27
+ $current_db_version = get_option('math_captcha_version', '1.0.0');
28
+
29
+ // new version?
30
+ if(version_compare($current_db_version, Math_Captcha()->defaults['version'], '<'))
31
+ {
32
+ if(version_compare($current_db_version, '1.0.9', '<'))
33
+ {
34
+ update_option('math_captcha_options', Math_Captcha()->options['general']);
35
+ delete_option('mc_options');
36
+ }
37
+
38
+ // updates plugin version
39
+ update_option('math_captcha_version', Math_Captcha()->defaults['version']);
40
+ }
41
+ }
42
+ }
43
+ ?>
includes/integration-cf7.php ADDED
@@ -0,0 +1,176 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ <?php
2
+ /**
3
+ A module for [mathcaptcha]
4
+ **/
5
+
6
+ // shortcode handler
7
+ add_action('init', 'wpcf7_add_shortcode_mathcaptcha', 5);
8
+
9
+ function wpcf7_add_shortcode_mathcaptcha()
10
+ {
11
+ wpcf7_add_shortcode('mathcaptcha', 'wpcf7_mathcaptcha_shortcode_handler', true);
12
+ }
13
+
14
+
15
+ function wpcf7_mathcaptcha_shortcode_handler($tag)
16
+ {
17
+ if(!is_user_logged_in() || (is_user_logged_in() && !Math_Captcha()->options['general']['hide_for_logged_users']))
18
+ {
19
+ $tag = new WPCF7_Shortcode($tag);
20
+
21
+ if(empty($tag->name))
22
+ return '';
23
+
24
+ $validation_error = wpcf7_get_validation_error($tag->name);
25
+ $class = wpcf7_form_controls_class($tag->type);
26
+
27
+ if($validation_error)
28
+ $class .= ' wpcf7-not-valid';
29
+
30
+ $atts = array();
31
+ $atts['size'] = 2;
32
+ $atts['maxlength'] = 2;
33
+ $atts['class'] = $tag->get_class_option($class);
34
+ $atts['id'] = $tag->get_option('id', 'id', true);
35
+ $atts['tabindex'] = $tag->get_option('tabindex', 'int', true);
36
+ $atts['aria-required'] = 'true';
37
+ $atts['type'] = 'text';
38
+ $atts['name'] = $tag->name;
39
+ $atts['value'] = '';
40
+ $atts = wpcf7_format_atts($atts);
41
+
42
+ $mc_form = Math_Captcha()->core->generate_captcha_phrase('cf7');
43
+ $mc_form[$mc_form['input']] = '<input %2$s />';
44
+
45
+ $math_captcha_title = apply_filters('math_captcha_title', Math_Captcha()->options['general']['title']);
46
+
47
+ return sprintf(((empty($math_captcha_title)) ? '' : $math_captcha_title).'<span class="wpcf7-form-control-wrap %1$s">'.$mc_form[1].$mc_form[2].$mc_form[3].'%3$s</span><input type="hidden" value="'.(Math_Captcha()->core->session_number - 1).'" name="'.$tag->name.'-sn" />', $tag->name, $atts, $validation_error);
48
+ }
49
+ }
50
+
51
+
52
+ // validation
53
+ add_filter('wpcf7_validate_mathcaptcha', 'wpcf7_mathcaptcha_validation_filter', 10, 2);
54
+
55
+ function wpcf7_mathcaptcha_validation_filter($result, $tag)
56
+ {
57
+ $tag = new WPCF7_Shortcode($tag);
58
+ $name = $tag->name;
59
+
60
+ if(!is_admin() && isset($_POST[$name]))
61
+ {
62
+ if($_POST[$name] !== '')
63
+ {
64
+ $session_id = (isset($_POST[$name.'-sn']) && $_POST[$name.'-sn'] !== '' ? Math_Captcha()->cookie_session->session_ids['multi'][$_POST[$name.'-sn']] : '');
65
+
66
+ if($session_id !== '' && get_transient('cf7_'.$session_id) !== false)
67
+ {
68
+ if(strcmp(get_transient('cf7_'.$session_id), sha1(AUTH_KEY.$_POST[$name].$session_id, false)) !== 0)
69
+ {
70
+ $result['valid'] = false;
71
+ $result['reason'][$name] = wpcf7_get_message('wrong_mathcaptcha');
72
+ }
73
+ }
74
+ else
75
+ {
76
+ $result['valid'] = false;
77
+ $result['reason'][$name] = wpcf7_get_message('time_mathcaptcha');
78
+ }
79
+ }
80
+ else
81
+ {
82
+ $result['valid'] = false;
83
+ $result['reason'][$name] = wpcf7_get_message('fill_mathcaptcha');
84
+ }
85
+ }
86
+
87
+ return $result;
88
+ }
89
+
90
+
91
+ // messages
92
+ add_filter('wpcf7_messages', 'wpcf7_mathcaptcha_messages');
93
+
94
+ function wpcf7_mathcaptcha_messages($messages)
95
+ {
96
+ return array_merge(
97
+ $messages,
98
+ array(
99
+ 'wrong_mathcaptcha' => array(
100
+ 'description' => __('Invalid captcha value.', 'math-captcha'),
101
+ 'default' => Math_Captcha()->core->error_messages['wrong']
102
+ ),
103
+ 'fill_mathcaptcha' => array(
104
+ 'description' => __('Please enter captcha value.', 'math-captcha'),
105
+ 'default' => Math_Captcha()->core->error_messages['fill']
106
+ ),
107
+ 'time_mathcaptcha' => array(
108
+ 'description' => __('Captcha time expired.', 'math-captcha'),
109
+ 'default' => Math_Captcha()->core->error_messages['time']
110
+ )
111
+ )
112
+ );
113
+ }
114
+
115
+
116
+ // warning message
117
+ add_action('wpcf7_admin_notices', 'wpcf7_mathcaptcha_display_warning_message');
118
+
119
+ function wpcf7_mathcaptcha_display_warning_message()
120
+ {
121
+ if(empty($_GET['post']) || !($contact_form = wpcf7_contact_form( $_GET['post'])))
122
+ return;
123
+
124
+ $has_tags = (bool)$contact_form->form_scan_shortcode(array('type' => array('mathcaptcha')));
125
+
126
+ if(!$has_tags)
127
+ return;
128
+ }
129
+
130
+
131
+ // tag generator
132
+ add_action('admin_init', 'wpcf7_add_tag_generator_mathcaptcha', 45);
133
+
134
+ function wpcf7_add_tag_generator_mathcaptcha()
135
+ {
136
+ if(!function_exists('wpcf7_add_tag_generator'))
137
+ return;
138
+