aboutsummaryrefslogtreecommitdiffstats
path: root/include/dir_fns.php
blob: 398f43d0037698621ad20957c44e36f98aa86402 (plain) (blame)
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
<?php
/**
 * @file include/dir_fns.php
 */

require_once('include/permissions.php');

/**
 * @brief
 *
 * @param int $dirmode
 * @return array
 */
function find_upstream_directory($dirmode) {
	global $DIRECTORY_FALLBACK_SERVERS;

	$preferred = get_config('system','directory_server');

	// Thwart attempts to use a private directory

	if(($preferred) && ($prefered != z_root())) {
		$r = q("select * from site where site_url = '%s' limit 1",
			dbesc($preferred)
		);
		if(($r) && ($r[0]['site_flags'] & DIRECTORY_MODE_STADALONE)) {
			$preferred = '';
		}		
	}


	if (! $preferred) {

		/*
		 * No directory has yet been set. For most sites, pick one at random
		 * from our list of directory servers. However, if we're a directory
		 * server ourself, point at the local instance
		 * We will then set this value so this should only ever happen once.
		 * Ideally there will be an admin setting to change to a different 
		 * directory server if you don't like our choice or if circumstances change.
		 */

		$dirmode = intval(get_config('system','directory_mode'));
		if ($dirmode == DIRECTORY_MODE_NORMAL) {
			$toss = mt_rand(0,count($DIRECTORY_FALLBACK_SERVERS));
			$preferred = $DIRECTORY_FALLBACK_SERVERS[$toss];
			set_config('system','directory_server',$preferred);
		} else{
			set_config('system','directory_server',z_root());
		}
	}

	return array('url' => $preferred);
}

/**
 * Directories may come and go over time. We will need to check that our
 * directory server is still valid occasionally, and reset to something that
 * is if our directory has gone offline for any reason
 */
function check_upstream_directory() {

	$directory = get_config('system', 'directory_server');

	// it's possible there is no directory server configured and the local hub is being used.
	// If so, default to preserving the absence of a specific server setting.

	$isadir = true;

	if ($directory) {
		$h = parse_url($directory);
		if ($h) {
			$x = zot_finger('[system]@' . $h['host']);
			if ($x['success']) {
				$j = json_decode($x['body'], true);
				if (array_key_exists('site', $j) && array_key_exists('directory_mode', $j['site'])) {
					if ($j['site']['directory_mode'] === 'normal') {
						$isadir = false;
					}
				}
			}
		}
	}

	if (! $isadir)
		set_config('system', 'directory_server', '');
}

function get_directory_setting($observer, $setting) {

	if ($observer)
		$ret = get_xconfig($observer, 'directory', $setting);
	else
		$ret = ((array_key_exists($setting,$_SESSION)) ? intval($_SESSION[$setting]) : false);

	if($ret === false)
		$ret = get_config('directory', $setting);

	if($setting == 'safemode' && $ret === false)
		$ret = 1;

	return $ret;
}

/**
 * @brief Called by the directory_sort widget.
 */
function dir_sort_links() {

	$safe_mode = 1;

	$observer = get_observer_hash();

	$safe_mode = get_directory_setting($observer, 'safemode');
	$globaldir = get_directory_setting($observer, 'globaldir');
	$pubforums = get_directory_setting($observer, 'pubforums');

	// Build urls without order and pubforums so it's easy to tack on the changed value
	// Probably there's an easier way to do this

	$directory_sort_order = get_config('system','directory_sort_order');
	if(! $directory_sort_order)
		$directory_sort_order = 'date';

	$current_order = (($_REQUEST['order']) ? $_REQUEST['order'] : $directory_sort_order);
	$suggest = (($_REQUEST['suggest']) ? '&suggest=' . $_REQUEST['suggest'] : '');

	$url = 'directory?f=';

	$tmp = array_merge($_GET,$_POST);
	unset($tmp['suggest']);
	unset($tmp['pubforums']);
	unset($tmp['global']);
	unset($tmp['safe']);
	unset($tmp['q']);
	unset($tmp['f']);
	$forumsurl = $url . http_build_query($tmp) . $suggest;

	$o = replace_macros(get_markup_template('dir_sort_links.tpl'), array(
		'$header' => t('Directory Options'),
		'$forumsurl' => $forumsurl,
		'$safemode' => array('safemode', t('Safe Mode'),$safe_mode,'',array(t('No'), t('Yes')),' onchange=\'window.location.href="' . $forumsurl . '&safe="+(this.checked ? 1 : 0)\''),
		'$pubforums' => array('pubforums', t('Public Forums Only'),$pubforums,'',array(t('No'), t('Yes')),' onchange=\'window.location.href="' . $forumsurl . '&pubforums="+(this.checked ? 1 : 0)\''),
		'$globaldir' => array('globaldir', t('This Website Only'), 1-intval($globaldir),'',array(t('No'), t('Yes')),' onchange=\'window.location.href="' . $forumsurl . '&global="+(this.checked ? 0 : 1)\''),
	));

	return $o;
}

/**
 * @brief Checks the directory mode of this hub.
 *
 * Checks the directory mode of this hub to see if it is some form of directory server. If it is,
 * get the directory realm of this hub. Fetch a list of all other directory servers in this realm and request
 * a directory sync packet. This will contain both directory updates and new ratings. Store these all in the DB. 
 * In the case of updates, we will query each of them asynchronously from a poller task. Ratings are stored 
 * directly if the rater's signature matches.
 *
 * @param int $dirmode;
 */
function sync_directories($dirmode) {

	if ($dirmode == DIRECTORY_MODE_STANDALONE || $dirmode == DIRECTORY_MODE_NORMAL)
		return;

	$realm = get_directory_realm();
	if ($realm == DIRECTORY_REALM) {
		$r = q("select * from site where (site_flags & %d) > 0 and site_url != '%s' and site_type = %d and ( site_realm = '%s' or site_realm = '') ",
			intval(DIRECTORY_MODE_PRIMARY|DIRECTORY_MODE_SECONDARY),
			dbesc(z_root()),
			intval(SITE_TYPE_ZOT),
			dbesc($realm)
		);
	} else {
		$r = q("select * from site where (site_flags & %d) > 0 and site_url != '%s' and site_realm like '%s' and site_type = %d ",
			intval(DIRECTORY_MODE_PRIMARY|DIRECTORY_MODE_SECONDARY),
			dbesc(z_root()),
			dbesc(protect_sprintf('%' . $realm . '%')),
			intval(SITE_TYPE_ZOT)
		);
	}

	// If there are no directory servers, setup the fallback master
	/** @FIXME What to do if we're in a different realm? */

	if ((! $r) && (z_root() != DIRECTORY_FALLBACK_MASTER)) {
		$r = array();
		$r[] = array(
			'site_url' => DIRECTORY_FALLBACK_MASTER,
			'site_flags' => DIRECTORY_MODE_PRIMARY,
			'site_update' => NULL_DATE, 
			'site_directory' => DIRECTORY_FALLBACK_MASTER . '/dirsearch',
			'site_realm' => DIRECTORY_REALM,
			'site_valid' => 1
			
		);
		$x = q("insert into site ( site_url, site_flags, site_update, site_directory, site_realm, site_valid )
			values ( '%s', %d, '%s', '%s', '%s', %d ) ",
			dbesc($r[0]['site_url']),
			intval($r[0]['site_flags']),
			dbesc($r[0]['site_update']),
			dbesc($r[0]['site_directory']),
			dbesc($r[0]['site_realm']),
			intval($r[0]['site_valid'])
		);

		$r = q("select * from site where site_flags in (%d, %d) and site_url != '%s' and site_type = %d ",
			intval(DIRECTORY_MODE_PRIMARY),
			intval(DIRECTORY_MODE_SECONDARY),
			dbesc(z_root()),
			intval(SITE_TYPE_ZOT)
		);
	}
	if (! $r)
		return;

	foreach ($r as $rr) {
		if (! $rr['site_directory'])
			continue;

		logger('sync directories: ' . $rr['site_directory']);

		// for brand new directory servers, only load the last couple of days.
		// It will take about a month for a new directory to obtain the full current repertoire of channels.
		/** @FIXME Go back and pick up earlier ratings if this is a new directory server. These do not get refreshed. */

		$token = get_config('system','realm_token');

		$syncdate = (($rr['site_sync'] === NULL_DATE) ? datetime_convert('UTC','UTC','now - 2 days') : $rr['site_sync']);
		$x = z_fetch_url($rr['site_directory'] . '?f=&sync=' . urlencode($syncdate) . (($token) ? '&t=' . $token : ''));

		if (! $x['success'])
			continue;

		$j = json_decode($x['body'],true);
		if (!($j['transactions']) || ($j['ratings']))
			continue;

		q("update site set site_sync = '%s' where site_url = '%s'",
			dbesc(datetime_convert()),
			dbesc($rr['site_url'])
		);

		logger('sync_directories: ' . $rr['site_url'] . ': ' . print_r($j,true), LOGGER_DATA);

		if (is_array($j['transactions']) && count($j['transactions'])) {
			foreach ($j['transactions'] as $t) {
				$r = q("select * from updates where ud_guid = '%s' limit 1",
					dbesc($t['transaction_id'])
				);
				if($r)
					continue;

				$ud_flags = 0;
				if (is_array($t['flags']) && in_array('deleted',$t['flags']))
					$ud_flags |= UPDATE_FLAGS_DELETED;
				if (is_array($t['flags']) && in_array('forced',$t['flags']))
					$ud_flags |= UPDATE_FLAGS_FORCED;

				$z = q("insert into updates ( ud_hash, ud_guid, ud_date, ud_flags, ud_addr )
					values ( '%s', '%s', '%s', %d, '%s' ) ",
					dbesc($t['hash']),
					dbesc($t['transaction_id']),
					dbesc($t['timestamp']),
					intval($ud_flags),
					dbesc($t['address'])
				);
			}
		}
		if (is_array($j['ratings']) && count($j['ratings'])) {
			foreach ($j['ratings'] as $rr) {
				$x = q("select * from xlink where xlink_xchan = '%s' and xlink_link = '%s' and xlink_static = 1",
					dbesc($rr['channel']),
					dbesc($rr['target'])
				);
				if ($x && $x[0]['xlink_updated'] >= $rr['edited'])
					continue;

				// Ratings are signed by the rater. We need to verify before we can accept it.
				/** @TODO Queue or defer if the xchan is not yet present on our site */

				$y = q("select xchan_pubkey from xchan where xchan_hash = '%s' limit 1",
					dbesc($rr['channel'])
				);
				if (! $y) {
					logger('key unavailable on this site for ' . $rr['channel']);
					continue;
				}
				if (! rsa_verify($rr['target'] . '.' . $rr['rating'] . '.' . $rr['rating_text'], base64url_decode($rr['signature']),$y[0]['xchan_pubkey'])) {
					logger('failed to verify rating');
					continue;
				}

				if ($x) {
					$z = q("update xlink set xlink_rating = %d, xlink_rating_text = '%s', xlink_sig = '%s', xlink_updated = '%s' where xlink_id = %d",
						intval($rr['rating']),
						dbesc($rr['rating_text']),
						dbesc($rr['signature']),
						dbesc(datetime_convert()),
						intval($x[0]['xlink_id'])
					);
					logger('rating updated');
				} else {
					$z = q("insert into xlink ( xlink_xchan, xlink_link, xlink_rating, xlink_rating_text, xlink_sig, xlink_updated, xlink_static ) values( '%s', '%s', %d, '%s', '%s', '%s', 1 ) ",
						dbesc($rr['channel']),
						dbesc($rr['target']),
						intval($rr['rating']),
						dbesc($rr['rating_text']),
						dbesc($rr['signature']),
						dbesc(datetime_convert())
					);
					logger('rating created');
				}
			}
		}
	}
}


/**
 * @brief
 *
 * Given an update record, probe the channel, grab a zot-info packet and refresh/sync the data.
 *
 * Ignore updating records marked as deleted.
 *
 * If successful, sets ud_last in the DB to the current datetime for this
 * reddress/webbie.
 *
 * @param array $ud Entry from update table
 */
function update_directory_entry($ud) {

	logger('update_directory_entry: ' . print_r($ud,true), LOGGER_DATA);

	if ($ud['ud_addr'] && (! ($ud['ud_flags'] & UPDATE_FLAGS_DELETED))) {
		$success = false;
		$x = zot_finger($ud['ud_addr'], '');
		if ($x['success']) {
			$j = json_decode($x['body'], true);
			if ($j)
				$success = true;

			$y = import_xchan($j, 0, $ud);
		}
		if (! $success) {
			q("update updates set ud_last = '%s' where ud_addr = '%s'",
				dbesc(datetime_convert()),
				dbesc($ud['ud_addr'])
			);
		}
	}
}


/**
 * @brief Push local channel updates to a local directory server.
 *
 * This is called from include/directory.php if a profile is to be pushed to the
 * directory and the local hub in this case is any kind of directory server.
 *
 * @param int $uid
 * @param boolean $force
 */
function local_dir_update($uid, $force) {

	logger('local_dir_update: uid: ' . $uid, LOGGER_DEBUG);

	$p = q("select channel.channel_hash, channel_address, channel_timezone, profile.* from profile left join channel on channel_id = uid where uid = %d and is_default = 1",
		intval($uid)
	);

	$profile = array();
	$profile['encoding'] = 'zot';

	if ($p) {
		$hash = $p[0]['channel_hash'];

		$profile['description'] = $p[0]['pdesc'];
		$profile['birthday']    = $p[0]['dob'];
		if ($age = age($p[0]['dob'],$p[0]['channel_timezone'],''))  
			$profile['age'] = $age;

		$profile['gender']      = $p[0]['gender'];
		$profile['marital']     = $p[0]['marital'];
		$profile['sexual']      = $p[0]['sexual'];
		$profile['locale']      = $p[0]['locality'];
		$profile['region']      = $p[0]['region'];
		$profile['postcode']    = $p[0]['postal_code'];
		$profile['country']     = $p[0]['country_name'];
		$profile['about']       = $p[0]['about'];
		$profile['homepage']    = $p[0]['homepage'];
		$profile['hometown']    = $p[0]['hometown'];

		if ($p[0]['keywords']) {
			$tags = array();
			$k = explode(' ', $p[0]['keywords']);
			if ($k)
				foreach ($k as $kk)
					if (trim($kk))
						$tags[] = trim($kk);

			if ($tags)
				$profile['keywords'] = $tags;
		}

		$hidden = (1 - intval($p[0]['publish']));

		logger('hidden: ' . $hidden);

		$r = q("select xchan_hidden from xchan where xchan_hash = '%s' limit 1",
			dbesc($p[0]['channel_hash'])
		);

		if(intval($r[0]['xchan_hidden']) != $hidden) {
			$r = q("update xchan set xchan_hidden = %d where xchan_hash = '%s'",
				intval($hidden),
				dbesc($p[0]['channel_hash'])
			);
		}

		$arr = array('channel_id' => $uid, 'hash' => $hash, 'profile' => $profile);
		call_hooks('local_dir_update', $arr);

		$address = $p[0]['channel_address'] . '@' . get_app()->get_hostname();

		if (perm_is_allowed($uid, '', 'view_profile')) {
			import_directory_profile($hash, $arr['profile'], $address, 0);
		} else {
			// they may have made it private
			$r = q("delete from xprof where xprof_hash = '%s'",
				dbesc($hash)
			);
			$r = q("delete from xtag where xtag_hash = '%s'",
				dbesc($hash)
			);
		}
	}

	$ud_hash = random_string() . '@' . get_app()->get_hostname();
	update_modtime($hash, $ud_hash, $p[0]['channel_address'] . '@' . get_app()->get_hostname(),(($force) ? UPDATE_FLAGS_FORCED : UPDATE_FLAGS_UPDATED));
}