summaryrefslogtreecommitdiff
path: root/lib/statusnet.php
blob: 0998944550ff532524192836d0d8756ef86b440f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
<?php
/**
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2009-2010 StatusNet, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

if (!defined('STATUSNET') && !defined('LACONICA')) {
    exit(1);
}

global $config, $_server, $_path;

/**
 * Global configuration setup and management.
 */
class StatusNet
{
    protected static $have_config;
    protected static $is_api;
    protected static $plugins = array();

    /**
     * Return a list of possible filenames that plugin $name can be in.
     *
     * @param string $name class name & plugin file/subdir name
     */
    public static function pluginFiles($name) {
        $name = ucfirst($name);
        $pluginclass = "{$name}Plugin";

        $files = array("local/plugins/{$pluginclass}.php",
                       "local/plugins/{$name}/{$pluginclass}.php",
                       "local/{$pluginclass}.php",
                       "local/{$name}/{$pluginclass}.php",
                       "plugins/{$pluginclass}.php",
                       "plugins/{$name}/{$pluginclass}.php");

        return $files;
    }

    /**
     * Configure and instantiate a plugin into the current configuration.
     * Class definitions will be loaded from standard paths if necessary.
     * Note that initialization events won't be fired until later.
     *
     * @param string $name class name & plugin file/subdir name
     * @param array $attrs key/value pairs of public attributes to set on plugin instance
     *
     * @throws ServerException if plugin can't be found
     */
    public static function addPlugin($name, $attrs = null)
    {
        $name = ucfirst($name);
        $pluginclass = "{$name}Plugin";

        if (!class_exists($pluginclass)) {

            $files = self::pluginFiles($name);

            foreach ($files as $file) {
                $fullpath = INSTALLDIR.'/'.$file;
                if (@file_exists($fullpath)) {
                    include_once($fullpath);
                    break;
                }
            }
            if (!class_exists($pluginclass)) {
                throw new ServerException("Plugin $name not found.", 500);
            }
        }

        $inst = new $pluginclass();
        if (!empty($attrs)) {
            foreach ($attrs as $aname => $avalue) {
                $inst->$aname = $avalue;
            }
        }

        // Record activated plugins for later display/config dump
        self::$plugins[] = array($name, $attrs);

        return true;
    }

    /**
     * Get a list of activated plugins in this process.
     * @return array of (string $name, array $args) pairs
     */
    public static function getActivePlugins()
    {
        return self::$plugins;
    }

    /**
     * Initialize, or re-initialize, StatusNet global configuration
     * and plugins.
     *
     * If switching site configurations during script execution, be
     * careful when working with leftover objects -- global settings
     * affect many things and they may not behave as you expected.
     *
     * @param $server optional web server hostname for picking config
     * @param $path optional URL path for picking config
     * @param $conffile optional configuration file path
     *
     * @throws NoConfigException if config file can't be found
     */
    public static function init($server=null, $path=null, $conffile=null)
    {
        StatusNet::initDefaults($server, $path);
        StatusNet::loadConfigFile($conffile);

        // Load settings from database; note we need autoload for this
        Config::loadSettings();

        self::initPlugins();
    }

    /**
     * Get identifier of the currently active site configuration
     * @return string
     */
    public static function currentSite()
    {
        return common_config('site', 'nickname');
    }

    /**
     * Change site configuration to site specified by nickname,
     * if set up via Status_network. If not, sites other than
     * the current will fail horribly.
     *
     * May throw exception or trigger a fatal error if the given
     * site is missing or configured incorrectly.
     *
     * @param string $nickname
     */
    public static function switchSite($nickname)
    {
        if ($nickname == StatusNet::currentSite()) {
            return true;
        }

        $sn = Status_network::staticGet('nickname', $nickname);
        if (empty($sn)) {
            return false;
            throw new Exception("No such site nickname '$nickname'");
        }

        $server = $sn->getServerName();
        StatusNet::init($server);
    }

    /**
     * Pull all local sites from status_network table.
     *
     * Behavior undefined if site is not configured via Status_network.
     *
     * @return array of nicknames
     */
    public static function findAllSites()
    {
        $sites = array();
        $sn = new Status_network();
        $sn->find();
        while ($sn->fetch()) {
            $sites[] = $sn->nickname;
        }
        return $sites;
    }
    /**
     * Return a list of plugins that are currently in the system.
     *
     * This means default plugins, plugins that are explicitly enabled, or
     * plugins that are explicitly disabled.
     */

    public static function getPlugins() {
        // Default plugins
        $pluginlist = common_config('plugins', 'default');
        // Enabled plugins
        $enabled=common_config_section('plugin-list');
        if ($enabled) {
            $pluginlist = array_merge($pluginlist,$enabled);
        }  
        return $pluginlist;
    }

    /**
     * Fire initialization events for all instantiated plugins.
     */
    protected static function initPlugins()
    {
        // Load plugins
        foreach (self::getPlugins() as $name => $params) {
            $key = 'disable-' . $name;
            if (common_config('plugins', $key)) {
                continue;
            }

            if (is_array($params)) {
                if (count($params) == 0) {
                    addPlugin($name);
                } else {
                    $keys = array_keys($params);
                    if (is_string($keys[0])) {
                        addPlugin($name, $params);
                    } else {
                        foreach ($params as $paramset) {
                            addPlugin($name, $paramset);
                        }
                    }
                }
            } else {
                addPlugin($name);
            }
        }

        // XXX: if plugins should check the schema at runtime, do that here.
        if (common_config('db', 'schemacheck') == 'runtime') {
            Event::handle('CheckSchema');
        }

        // Give plugins a chance to initialize in a fully-prepared environment
        Event::handle('InitializePlugin');
    }

    /**
     * Quick-check if configuration has been established.
     * Useful for functions which may get used partway through
     * initialization to back off from fancier things.
     *
     * @return bool
     */
    public function haveConfig()
    {
        return self::$have_config;
    }

    public function isApi()
    {
        return self::$is_api;
    }

    public function setApi($mode)
    {
        self::$is_api = $mode;
    }

    /**
     * Build default configuration array
     * @return array
     */
    protected static function defaultConfig()
    {
        global $_server, $_path;
        require(INSTALLDIR.'/lib/default.php');
        return $default;
    }

    /**
     * Establish default configuration based on given or default server and path
     * Sets global $_server, $_path, and $config
     */
    public static function initDefaults($server, $path)
    {
        global $_server, $_path, $config;

        Event::clearHandlers();
        self::$plugins = array();

        // try to figure out where we are. $server and $path
        // can be set by including module, else we guess based
        // on HTTP info.

        if (isset($server)) {
            $_server = $server;
        } else {
            $_server = array_key_exists('SERVER_NAME', $_SERVER) ?
              strtolower($_SERVER['SERVER_NAME']) :
            null;
        }

        if (isset($path)) {
            $_path = $path;
        } else {
            $_path = (array_key_exists('SERVER_NAME', $_SERVER) && array_key_exists('SCRIPT_NAME', $_SERVER)) ?
              self::_sn_to_path($_SERVER['SCRIPT_NAME']) :
            null;
        }

        // Set config values initially to default values
        $default = self::defaultConfig();
        $config = $default;

        // default configuration, overwritten in config.php
        // Keep DB_DataObject's db config synced to ours...

        $config['db'] = &PEAR::getStaticProperty('DB_DataObject','options');

        $config['db'] = $default['db'];

        // Backward compatibility

        $config['site']['design'] =& $config['design'];

        if (function_exists('date_default_timezone_set')) {
            /* Work internally in UTC */
            date_default_timezone_set('UTC');
        }
    }

    protected function _sn_to_path($sn)
    {
        $past_root = substr($sn, 1);
        $last_slash = strrpos($past_root, '/');
        if ($last_slash > 0) {
            $p = substr($past_root, 0, $last_slash);
        } else {
            $p = '';
        }
        return $p;
    }

    /**
     * Load the default or specified configuration file.
     * Modifies global $config and may establish plugins.
     *
     * @throws NoConfigException
     */
    protected function loadConfigFile($conffile=null)
    {
        global $_server, $_path, $config;

        // From most general to most specific:
        // server-wide, then vhost-wide, then for a path,
        // finally for a dir (usually only need one of the last two).

        if (isset($conffile)) {
            $config_files = array($conffile);
        } else {
            $config_files = array('/etc/statusnet/statusnet.php',
                                  '/etc/statusnet/laconica.php',
                                  '/etc/laconica/laconica.php',
                                  '/etc/statusnet/'.$_server.'.php',
                                  '/etc/laconica/'.$_server.'.php');

            if (strlen($_path) > 0) {
                $config_files[] = '/etc/statusnet/'.$_server.'_'.$_path.'.php';
                $config_files[] = '/etc/laconica/'.$_server.'_'.$_path.'.php';
            }

            $config_files[] = INSTALLDIR.'/config.php';
        }

        self::$have_config = false;

        foreach ($config_files as $_config_file) {
            if (@file_exists($_config_file)) {
                // Ignore 0-byte config files
                if (filesize($_config_file) > 0) {
                    include($_config_file);
                    self::$have_config = true;
                }
            }
        }

        if (!self::$have_config) {
            throw new NoConfigException("No configuration file found.",
                                        $config_files);
        }

        // Fixup for statusnet.ini
        $_db_name = substr($config['db']['database'], strrpos($config['db']['database'], '/') + 1);

        if ($_db_name != 'statusnet' && !array_key_exists('ini_'.$_db_name, $config['db'])) {
            $config['db']['ini_'.$_db_name] = INSTALLDIR.'/classes/statusnet.ini';
        }

        // Backwards compatibility
        if (array_key_exists('memcached', $config)) {
            if ($config['memcached']['enabled']) {
                addPlugin('Memcache', array('servers' => $config['memcached']['server']));
            }

            if (!empty($config['memcached']['base'])) {
                $config['cache']['base'] = $config['memcached']['base'];
            }
        }
        if (array_key_exists('xmpp', $config)) {
            if ($config['xmpp']['enabled']) {
                addPlugin('xmpp', array(
                    'server' => $config['xmpp']['server'],
                    'port' => $config['xmpp']['port'],
                    'user' => $config['xmpp']['user'],
                    'resource' => $config['xmpp']['resource'],
                    'encryption' => $config['xmpp']['encryption'],
                    'password' => $config['xmpp']['password'],
                    'host' => $config['xmpp']['host'],
                    'debug' => $config['xmpp']['debug'],
                    'public' => $config['xmpp']['public']
                ));
            }
        }
    }

    /**
     * Are we running from the web with HTTPS?
     *
     * @return boolean true if we're running with HTTPS; else false
     */

    static function isHTTPS()
    {
        // There are some exceptions to this; add them here!
        if(empty($_SERVER['HTTPS'])) {
            return false;
        } else {
            return $_SERVER['HTTPS'] !== 'off';
        }
    }
}

class NoConfigException extends Exception
{
    public $configFiles;

    function __construct($msg, $configFiles) {
        parent::__construct($msg);
        $this->configFiles = $configFiles;
    }
}