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1 | <?php |
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2 | |
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3 | /** |
4 | * prefs.php |
5 | * |
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6 | * Copyright (c) 1999-2002 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This contains functions for manipulating user preferences |
10 | * |
11 | * $Id$ |
12 | */ |
13 | |
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14 | global $prefs_are_cached, $prefs_cache; |
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15 | |
16 | if ( !session_is_registered('prefs_are_cached') || |
17 | !isset( $prefs_cache) || |
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18 | !is_array( $prefs_cache) || |
19 | substr( phpversion(), 0, 3 ) == '4.1' ) { |
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20 | $prefs_are_cached = false; |
21 | $prefs_cache = array(); |
22 | } |
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23 | |
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24 | /** |
25 | * Check the preferences into the session cache. |
26 | */ |
27 | function cachePrefValues($data_dir, $username) { |
28 | global $prefs_are_cached, $prefs_cache; |
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29 | |
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30 | if ($prefs_are_cached) { |
31 | return; |
32 | } |
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33 | |
34 | session_unregister('prefs_cache'); |
35 | session_unregister('prefs_are_cached'); |
36 | |
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37 | /* Calculate the filename for the user's preference file */ |
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38 | $filename = getHashedFile($username, $data_dir, "$username.pref"); |
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39 | |
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40 | /* A call to checkForPrefs here should take eliminate the need for */ |
41 | /* this to be called throughout the rest of the SquirrelMail code. */ |
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42 | checkForPrefs($data_dir, $username, $filename); |
43 | |
44 | /* Make sure that the preference file now DOES exist. */ |
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45 | if (!file_exists($filename)) { |
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46 | echo sprintf (_("Preference file, %s, does not exist. Log out, and log back in to create a default preference file."), $filename) . "<br>\n"; |
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47 | exit; |
48 | } |
49 | |
50 | $file = fopen($filename, 'r'); |
51 | |
52 | /* Read in the preferences. */ |
53 | $highlight_num = 0; |
54 | while (! feof($file)) { |
55 | $pref = trim(fgets($file, 1024)); |
56 | $equalsAt = strpos($pref, '='); |
57 | if ($equalsAt > 0) { |
58 | $key = substr($pref, 0, $equalsAt); |
59 | $value = substr($pref, $equalsAt + 1); |
60 | if (substr($key, 0, 9) == 'highlight') { |
61 | $key = 'highlight' . $highlight_num; |
62 | $highlight_num ++; |
63 | } |
64 | |
65 | if ($value != '') { |
66 | $prefs_cache[$key] = $value; |
67 | } |
68 | } |
69 | } |
70 | fclose($file); |
71 | |
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72 | $prefs_are_cached = true; |
73 | |
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74 | session_register('prefs_cache'); |
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75 | session_register('prefs_are_cached'); |
76 | } |
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77 | |
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78 | /** |
79 | * Return the value for the prefernce given by $string. |
80 | */ |
81 | function getPref($data_dir, $username, $string, $default = '') { |
82 | global $prefs_cache; |
83 | $result = ''; |
84 | |
85 | cachePrefValues($data_dir, $username); |
86 | |
87 | if (isset($prefs_cache[$string])) { |
88 | $result = $prefs_cache[$string]; |
89 | } else { |
90 | $result = $default; |
91 | } |
92 | |
93 | return ($result); |
94 | } |
95 | |
96 | /** |
97 | * Save the preferences for this user. |
98 | */ |
99 | function savePrefValues($data_dir, $username) { |
100 | global $prefs_cache; |
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101 | |
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102 | $filename = getHashedFile($username, $data_dir, "$username.pref"); |
103 | |
104 | $file = fopen($filename, 'w'); |
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105 | foreach ($prefs_cache as $Key => $Value) { |
106 | if (isset($Value)) { |
107 | fwrite($file, $Key . '=' . $Value . "\n"); |
108 | } |
109 | } |
110 | fclose($file); |
111 | } |
112 | |
113 | /** |
114 | * Remove a preference for the current user. |
115 | */ |
116 | function removePref($data_dir, $username, $string) { |
117 | global $prefs_cache; |
118 | |
119 | cachePrefValues($data_dir, $username); |
120 | |
121 | if (isset($prefs_cache[$string])) { |
122 | unset($prefs_cache[$string]); |
123 | } |
124 | |
125 | savePrefValues($data_dir, $username); |
126 | } |
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127 | |
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128 | /** |
129 | * Set a there preference $string to $value. |
130 | */ |
131 | function setPref($data_dir, $username, $string, $value) { |
132 | global $prefs_cache; |
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133 | |
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134 | cachePrefValues($data_dir, $username); |
135 | if (isset($prefs_cache[$string]) && ($prefs_cache[$string] == $value)) { |
136 | return; |
137 | } |
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138 | |
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139 | if ($value === '') { |
140 | removePref($data_dir, $username, $string); |
141 | return; |
142 | } |
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143 | |
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144 | $prefs_cache[$string] = $value; |
145 | savePrefValues($data_dir, $username); |
146 | } |
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147 | |
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148 | /** |
149 | * Check for a preferences file. If one can not be found, create it. |
150 | */ |
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151 | function checkForPrefs($data_dir, $username, $filename = '') { |
152 | /* First, make sure we have the filename. */ |
153 | if ($filename == '') { |
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154 | $filename = getHashedFile($username, $data_dir, '$username.pref'); |
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155 | } |
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156 | |
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157 | /* Then, check if the file exists. */ |
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158 | if (!@file_exists($filename) ) { |
159 | /* First, check the $data_dir for the default preference file. */ |
160 | $default_pref = $data_dir . 'default_pref'; |
161 | |
162 | /* If it is not there, check the internal data directory. */ |
163 | if (!@file_exists($default_pref)) { |
164 | $default_pref = '../data/default_pref'; |
165 | } |
166 | |
167 | /* Otherwise, report an error. */ |
168 | if (!file_exists($default_pref)) { |
169 | echo _("Error opening ") . $default_pref . "<br>\n"; |
170 | echo _("Default preference file not found!") . "<br>\n"; |
171 | echo _("Please contact your system administrator and report this error.") . "<br>\n"; |
172 | exit; |
173 | } else if (!@copy($default_pref, $filename)) { |
174 | echo _("Error opening ") . $default_pref . '<br>'; |
175 | echo _("Could not create initial preference file!") . "<br>\n"; |
176 | echo _("Please contact your system administrator and report this error.") . "<br>\n"; |
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177 | exit; |
178 | } |
179 | } |
180 | } |
181 | |
182 | /** |
183 | * Write the User Signature. |
184 | */ |
185 | function setSig($data_dir, $username, $value) { |
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186 | $filename = getHashedFile($username, $data_dir, "$username.sig"); |
187 | $file = fopen($filename, 'w'); |
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188 | fwrite($file, $value); |
189 | fclose($file); |
190 | } |
191 | |
192 | /** |
193 | * Get the signature. |
194 | */ |
195 | function getSig($data_dir, $username) { |
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196 | #$filename = $data_dir . $username . '.sig'; |
197 | $filename = getHashedFile($username, $data_dir, "$username.sig"); |
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198 | $sig = ''; |
199 | if (file_exists($filename)) { |
200 | $file = fopen($filename, 'r'); |
201 | while (!feof($file)) { |
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202 | $sig .= fgets($file, 1024); |
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203 | } |
204 | fclose($file); |
205 | } |
206 | return $sig; |
207 | } |
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208 | |
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209 | function getHashedFile($username, $dir, $datafile, $hash_search = true) { |
210 | global $dir_hash_level; |
211 | |
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212 | /* Remove trailing slash from $dir if found */ |
213 | if (substr($dir, -1) == '/') { |
214 | $dir = substr($dir, 0, strlen($dir) - 1); |
215 | } |
216 | |
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217 | /* Compute the hash for this user and extract the hash directories. */ |
218 | $hash_dirs = computeHashDirs($username); |
219 | |
220 | /* First, get and make sure the full hash directory exists. */ |
221 | $real_hash_dir = getHashedDir($username, $dir, $hash_dirs); |
222 | |
223 | /* Set the value of our real data file. */ |
224 | $result = "$real_hash_dir/$datafile"; |
225 | |
226 | /* Check for this file in the real hash directory. */ |
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227 | if ($hash_search && !@file_exists($result)) { |
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228 | /* First check the base directory, the most common location. */ |
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229 | if (@file_exists("$dir/$datafile")) { |
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230 | rename("$dir/$datafile", $result); |
231 | |
232 | /* Then check the full range of possible hash directories. */ |
233 | } else { |
234 | $check_hash_dir = $dir; |
235 | for ($h = 0; $h < 4; ++$h) { |
236 | $check_hash_dir .= '/' . $hash_dirs[$h]; |
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237 | if (@is_readable("$check_hash_dir/$datafile")) { |
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238 | rename("$check_hash_dir/$datafile", $result); |
239 | break; |
240 | } |
241 | } |
242 | } |
243 | } |
244 | |
245 | /* Return the full hashed datafile path. */ |
246 | return ($result); |
247 | } |
248 | |
249 | function getHashedDir($username, $dir, $hash_dirs = '') { |
250 | global $dir_hash_level; |
251 | |
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252 | /* Remove trailing slash from $dir if found */ |
253 | if (substr($dir, -1) == '/') { |
254 | $dir = substr($dir, 0, strlen($dir) - 1); |
255 | } |
256 | |
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257 | /* If necessary, populate the hash dir variable. */ |
258 | if ($hash_dirs == '') { |
259 | $hash_dirs = computeHashDirs($username); |
260 | } |
261 | |
262 | /* Make sure the full hash directory exists. */ |
263 | $real_hash_dir = $dir; |
264 | for ($h = 0; $h < $dir_hash_level; ++$h) { |
265 | $real_hash_dir .= '/' . $hash_dirs[$h]; |
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266 | if (!@is_dir($real_hash_dir)) { |
267 | if (!@mkdir($real_hash_dir, 0770)) { |
268 | echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>'; |
269 | echo _("Could not create hashed directory structure!") . "<br>\n"; |
270 | echo _("Please contact your system administrator and report this error.") . "<br>\n"; |
271 | exit; |
272 | } |
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273 | } |
274 | } |
275 | |
276 | /* And return that directory. */ |
277 | return ($real_hash_dir); |
278 | } |
279 | |
280 | function computeHashDirs($username) { |
281 | /* Compute the hash for this user and extract the hash directories. */ |
282 | $hash = base_convert(crc32($username), 10, 16); |
283 | $hash_dirs = array(); |
284 | for ($h = 0; $h < 4; ++ $h) { |
285 | $hash_dirs[] = substr($hash, $h, 1); |
286 | } |
287 | |
288 | /* Return our array of hash directories. */ |
289 | return ($hash_dirs); |
290 | } |
291 | |
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292 | ?> |