aboutsummaryrefslogtreecommitdiff
path: root/engine/lib/admin.php
blob: 5a475a9f0dd8cfc53fb33c9f690e04b77cabb625 (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
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
<?php
/**
 * Elgg admin functions.
 *
 * Admin menu items
 * Elgg has a convenience function for adding menu items to the sidebar of the
 * admin area. @see elgg_register_admin_menu_item()
 *
 * Admin pages
 * Plugins no not need to provide their own page handler to add a page to the
 * admin area. A view placed at admin/<section>/<subsection> can be access
 * at http://example.org/admin/<section>/<subsection>. The title of the page
 * will be elgg_echo('admin:<section>:<subsection>'). For an example of how to
 * add a page to the admin area, see the diagnostics plugin.
 *
 * Admin notices
 * System messages (success and error messages) are used in both the main site
 * and the admin area. There is a special presistent message for the admin area
 * called an admin notice. It should be used when a plugin requires an
 * administrator to take an action. An example is the categories plugin
 * requesting that the administrator set site categories after the plugin has
 * been activated. @see elgg_add_admin_notice()
 *
 *
 * @package Elgg.Core
 * @subpackage Admin
 */

/**
 * Get the admin users 
 *
 * @param array $options Options array, @see elgg_get_entities() for parameters
 *
 * @return mixed Array of admin users or false on failure. If a count, returns int.
 * @since 1.8.0
 */
function elgg_get_admins(array $options = array()) {
	global $CONFIG;

	if (isset($options['joins'])) {
		if (!is_array($options['joins'])) {
			$options['joins'] = array($options['joins']);
		}
		$options['joins'][] = "join {$CONFIG->dbprefix}users_entity u on e.guid=u.guid";
	} else {
		$options['joins'] = array("join {$CONFIG->dbprefix}users_entity u on e.guid=u.guid");
	}

	if (isset($options['wheres'])) {
		if (!is_array($options['wheres'])) {
			$options['wheres'] = array($options['wheres']);
		}
		$options['wheres'][] = "u.admin = 'yes'";
	} else {
		$options['wheres'][] = "u.admin = 'yes'";
	}

	return elgg_get_entities($options);
}

/**
 * Write a persistent message to the admin view.
 * Useful to alert the admin to take a certain action.
 * The id is a unique ID that can be cleared once the admin
 * completes the action.
 *
 * eg: add_admin_notice('twitter_services_no_api',
 * 	'Before your users can use Twitter services on this site, you must set up
 * 	the Twitter API key in the <a href="link">Twitter Services Settings</a>');
 *
 * @param string $id      A unique ID that your plugin can remember
 * @param string $message Body of the message
 *
 * @return bool
 * @since 1.8.0
 */
function elgg_add_admin_notice($id, $message) {
	if ($id && $message) {
		if (elgg_admin_notice_exists($id)) {
			return false;
		}

		// need to handle when no one is logged in
		$old_ia = elgg_set_ignore_access(true);

		$admin_notice = new ElggObject();
		$admin_notice->subtype = 'admin_notice';
		// admins can see ACCESS_PRIVATE but no one else can.
		$admin_notice->access_id = ACCESS_PRIVATE;
		$admin_notice->admin_notice_id = $id;
		$admin_notice->description = $message;

		$result = $admin_notice->save();

		elgg_set_ignore_access($old_ia);

		return (bool)$result;
	}

	return false;
}

/**
 * Remove an admin notice by ID.
 *
 * eg In actions/twitter_service/save_settings:
 * 	if (is_valid_twitter_api_key()) {
 * 		delete_admin_notice('twitter_services_no_api');
 * 	}
 *
 * @param string $id The unique ID assigned in add_admin_notice()
 *
 * @return bool
 * @since 1.8.0
 */
function elgg_delete_admin_notice($id) {
	if (!$id) {
		return FALSE;
	}
	$result = TRUE;
	$notices = elgg_get_entities_from_metadata(array(
		'metadata_name' => 'admin_notice_id',
		'metadata_value' => $id
	));

	if ($notices) {
		// in case a bad plugin adds many, let it remove them all at once.
		foreach ($notices as $notice) {
			$result = ($result && $notice->delete());
		}
		return $result;
	}
	return FALSE;
}

/**
 * List all admin messages.
 *
 * @param int $limit Limit
 *
 * @return array List of admin notices
 * @since 1.8.0
 */
function elgg_get_admin_notices($limit = 10) {
	return elgg_get_entities_from_metadata(array(
		'type' => 'object',
		'subtype' => 'admin_notice',
		'limit' => $limit
	));
}

/**
 * Check if an admin notice is currently active.
 *
 * @param string $id The unique ID used to register the notice.
 *
 * @return bool
 * @since 1.8.0
 */
function elgg_admin_notice_exists($id) {
	$notice = elgg_get_entities_from_metadata(array(
		'type' => 'object',
		'subtype' => 'admin_notice',
		'metadata_name_value_pair' => array('name' => 'admin_notice_id', 'value' => $id)
	));

	return ($notice) ? TRUE : FALSE;
}

/**
 * Add an admin area section or child section.
 * This is a wrapper for elgg_register_menu_item().
 *
 * Used in conjuction with http://elgg.org/admin/section_id/child_section style
 * page handler. See the documentation at the top of this file for more details
 * on that.
 *
 * The text of the menu item is obtained from elgg_echo(admin:$parent_id:$menu_id)
 *
 * This function handles registering the parent if it has not been registered.
 *
 * @param string $section    The menu section to add to
 * @param string $menu_id    The unique ID of section
 * @param string $parent_id  If a child section, the parent section id
 * @param int    $priority   The menu item priority
 *
 * @return bool
 * @since 1.8.0
 */
function elgg_register_admin_menu_item($section, $menu_id, $parent_id = NULL, $priority = 100) {

	// make sure parent is registered
	if ($parent_id && !elgg_is_menu_item_registered('page', $parent_id)) {
		elgg_register_admin_menu_item($section, $parent_id);
	}

	// in the admin section parents never have links
	if ($parent_id) {
		$href = "admin/$parent_id/$menu_id";
	} else {
		$href = NULL;
	}

	$name = $menu_id;
	if ($parent_id) {
		$name = "$parent_id:$name";
	}

	return elgg_register_menu_item('page', array(
		'name' => $name,
		'href' => $href,
		'text' => elgg_echo("admin:$name"),
		'context' => 'admin',
		'parent_name' => $parent_id,
		'priority' => $priority,
		'section' => $section
	));
}

/**
 * Initialize the admin backend.
 * @return void
 * @access private
 */
function admin_init() {
	elgg_register_action('admin/user/ban', '', 'admin');
	elgg_register_action('admin/user/unban', '', 'admin');
	elgg_register_action('admin/user/delete', '', 'admin');
	elgg_register_action('admin/user/resetpassword', '', 'admin');
	elgg_register_action('admin/user/makeadmin', '', 'admin');
	elgg_register_action('admin/user/removeadmin', '', 'admin');

	elgg_register_action('admin/site/update_basic', '', 'admin');
	elgg_register_action('admin/site/update_advanced', '', 'admin');
	elgg_register_action('admin/site/flush_cache', '', 'admin');

	elgg_register_action('admin/menu/save', '', 'admin');

	elgg_register_action('admin/delete_admin_notice', '', 'admin');

	elgg_register_action('profile/fields/reset', '', 'admin');
	elgg_register_action('profile/fields/add', '', 'admin');
	elgg_register_action('profile/fields/edit', '', 'admin');
	elgg_register_action('profile/fields/delete', '', 'admin');
	elgg_register_action('profile/fields/reorder', '', 'admin');

	elgg_register_simplecache_view('js/admin');
	$url = elgg_get_simplecache_url('js', 'admin');
	elgg_register_js('elgg.admin', $url);
	elgg_register_js('jquery.jeditable', 'vendors/jquery/jquery.jeditable.mini.js');

	// administer
	// dashboard
	elgg_register_menu_item('page', array(
		'name' => 'dashboard',
		'href' => 'admin/dashboard',
		'text' => elgg_echo('admin:dashboard'),
		'context' => 'admin',
		'priority' => 10,
		'section' => 'administer'
	));
	// statistics
	elgg_register_admin_menu_item('administer', 'statistics', null, 20);
	elgg_register_admin_menu_item('administer', 'overview', 'statistics');
	elgg_register_admin_menu_item('administer', 'server', 'statistics');

	// users
	elgg_register_admin_menu_item('administer', 'users', null, 20);
	elgg_register_admin_menu_item('administer', 'online', 'users', 10);
	elgg_register_admin_menu_item('administer', 'newest', 'users', 20);
	elgg_register_admin_menu_item('administer', 'add', 'users', 30);

	// configure
	// plugins
	elgg_register_menu_item('page', array(
		'name' => 'plugins',
		'href' => 'admin/plugins',
		'text' => elgg_echo('admin:plugins'),
		'context' => 'admin',
		'priority' => 75,
		'section' => 'configure'
	));

	// settings
	elgg_register_admin_menu_item('configure', 'appearance', null, 50);
	elgg_register_admin_menu_item('configure', 'settings', null, 100);
	elgg_register_admin_menu_item('configure', 'basic', 'settings', 10);
	elgg_register_admin_menu_item('configure', 'advanced', 'settings', 20);
	elgg_register_admin_menu_item('configure', 'menu_items', 'appearance', 30);
	elgg_register_admin_menu_item('configure', 'profile_fields', 'appearance', 40);
	// default widgets is added via an event handler elgg_default_widgets_init() in widgets.php
	// because it requires additional setup.

	// plugin settings are added in elgg_admin_add_plugin_settings_menu() via the admin page handler
	// for performance reasons.

	// we want plugin settings menu items to be sorted alphabetical
	if (elgg_in_context('admin')) {
		elgg_register_plugin_hook_handler('prepare', 'menu:page', 'elgg_admin_sort_page_menu');
	}

	if (elgg_is_admin_logged_in()) {
		elgg_register_menu_item('topbar', array(
			'name' => 'administration',
			'href' => 'admin',
			'text' => elgg_view_icon('settings') . elgg_echo('admin'),
			'priority' => 100,
			'section' => 'alt',
		));
	}
			
	// widgets
	$widgets = array('online_users', 'new_users', 'content_stats', 'admin_welcome', 'control_panel');
	foreach ($widgets as $widget) {
		elgg_register_widget_type(
				$widget,
				elgg_echo("admin:widget:$widget"),
				elgg_echo("admin:widget:$widget:help"),
				'admin'
		);
	}

	// automatic adding of widgets for admin
	elgg_register_event_handler('make_admin', 'user', 'elgg_add_admin_widgets');

	elgg_register_page_handler('admin', 'admin_page_handler');
	elgg_register_page_handler('admin_plugin_screenshot', 'admin_plugin_screenshot_page_handler');
	elgg_register_page_handler('admin_plugin_text_file', 'admin_markdown_page_handler');
}

/**
 * Create the plugin settings page menu.
 *
 * This is done in a separate function called from the admin
 * page handler because of performance concerns.
 *
 * @return void
 * @access private
 * @since 1.8.0
 */
function elgg_admin_add_plugin_settings_menu() {

	$active_plugins = elgg_get_plugins('active');
	if (!$active_plugins) {
		// nothing added because no items
		return FALSE;
	}

	foreach ($active_plugins as $plugin) {
		$plugin_id = $plugin->getID();
		$settings_view_old = 'settings/' . $plugin_id . '/edit';
		$settings_view_new = 'plugins/' . $plugin_id . '/settings';
		if (elgg_view_exists($settings_view_new) || elgg_view_exists($settings_view_old)) {
			elgg_register_menu_item('page', array(
				'name' => $plugin_id,
				'href' => "admin/plugin_settings/$plugin_id",
				'text' => $plugin->getManifest()->getName(),
				'parent_name' => 'settings',
				'context' => 'admin',
				'section' => 'configure',
			));
		}
	}
}

/**
 * Sort the plugin settings menu items
 *
 * @param string $hook
 * @param string $type
 * @param array  $return
 * @param array  $params
 *
 * @return void
 * @since 1.8.0
 * @access private
 */
function elgg_admin_sort_page_menu($hook, $type, $return, $params) {
	$configure_items = $return['configure'];
	foreach ($configure_items as $menu_item) {
		if ($menu_item->getName() == 'settings') {
			$settings = $menu_item;
		}
	}

	// keep the basic and advanced settings at the top
	$children = $settings->getChildren();
	$site_settings = array_splice($children, 0, 2);
	usort($children, array('ElggMenuBuilder', 'compareByText'));
	array_splice($children, 0, 0, $site_settings);
	$settings->setChildren($children);
}

/**
 * Handles any set up required for administration pages
 *
 * @return void
 * @access private
 */
function admin_pagesetup() {
	if (elgg_in_context('admin')) {
		$url = elgg_get_simplecache_url('css', 'admin');
		elgg_register_css('elgg.admin', $url);
		elgg_load_css('elgg.admin');
		elgg_unregister_css('elgg');

		// setup footer menu
		elgg_register_menu_item('admin_footer', array(
			'name' => 'faq',
			'text' => elgg_echo('admin:footer:faq'),
			'href' => 'http://docs.elgg.org/wiki/Category:Administration_FAQ',
		));

		elgg_register_menu_item('admin_footer', array(
			'name' => 'manual',
			'text' => elgg_echo('admin:footer:manual'),
			'href' => 'http://docs.elgg.org/wiki/Administration_Manual',
		));

		elgg_register_menu_item('admin_footer', array(
			'name' => 'community_forums',
			'text' => elgg_echo('admin:footer:community_forums'),
			'href' => 'http://community.elgg.org/pg/groups/world/',
		));

		elgg_register_menu_item('admin_footer', array(
			'name' => 'blog',
			'text' => elgg_echo('admin:footer:blog'),
			'href' => 'http://blog.elgg.org/',
		));
	}
}

/**
 * Handle admin pages.  Expects corresponding views as admin/section/subsection
 *
 * @param array $page Array of pages
 *
 * @return bool
 * @access private
 */
function admin_page_handler($page) {

	admin_gatekeeper();
	elgg_admin_add_plugin_settings_menu();
	elgg_set_context('admin');

	elgg_unregister_css('elgg');
	elgg_load_js('elgg.admin');
	elgg_load_js('jquery.jeditable');

	// default to dashboard
	if (!isset($page[0]) || empty($page[0])) {
		$page = array('dashboard');
	}

	// was going to fix this in the page_handler() function but
	// it's commented to explicitly return a string if there's a trailing /
	if (empty($page[count($page) - 1])) {
		array_pop($page);
	}

	$vars = array('page' => $page);

	// special page for plugin settings since we create the form for them
	if ($page[0] == 'plugin_settings' && isset($page[1]) &&
		(elgg_view_exists("settings/{$page[1]}/edit") || elgg_view_exists("plugins/{$page[1]}/settings"))) {

		$view = 'admin/plugin_settings';
		$plugin = elgg_get_plugin_from_id($page[1]);
		$vars['plugin'] = $plugin;

		$title = elgg_echo("admin:{$page[0]}");
	} else {
		$view = 'admin/' . implode('/', $page);
		$title = elgg_echo("admin:{$page[0]}");
		if (count($page) > 1) {
			$title .= ' : ' . elgg_echo('admin:' .  implode(':', $page));
		}
	}

	// gets content and prevents direct access to 'components' views
	if ($page[0] == 'components' || !($content = elgg_view($view, $vars))) {
		$title = elgg_echo('admin:unknown_section');
		$content = elgg_echo('admin:unknown_section');
	}

	$body = elgg_view_layout('admin', array('content' => $content, 'title' => $title));
	echo elgg_view_page($title, $body, 'admin');
	return true;
}

/**
 * Serves up screenshots for plugins from
 * admin_plugin_screenshot/<plugin_id>/<size>/<ss_name>.<ext>
 *
 * @param array $pages The pages array
 * @return bool
 * @access private
 */
function admin_plugin_screenshot_page_handler($pages) {
	// only admins can use this for security
	admin_gatekeeper();

	$plugin_id = elgg_extract(0, $pages);
	// only thumbnail or full.
	$size = elgg_extract(1, $pages, 'thumbnail');

	// the rest of the string is the filename
	$filename_parts = array_slice($pages, 2);
	$filename = implode('/', $filename_parts);
	$filename = sanitise_filepath($filename, false);

	$plugin = new ElggPlugin($plugin_id);
	if (!$plugin) {
		$file = elgg_get_root_path() . '_graphics/icons/default/medium.png';
	} else {
		$file = $plugin->getPath() . $filename;
		if (!file_exists($file)) {
			$file = elgg_get_root_path() . '_graphics/icons/default/medium.png';
		}
	}

	header("Content-type: image/jpeg");

	// resize to 100x100 for thumbnails
	switch ($size) {
		case 'thumbnail':
			echo get_resized_image_from_existing_file($file, 100, 100, true);
			break;

		case 'full':
		default:
			echo file_get_contents($file);
			break;
	}
	return true;
}

/**
 * Formats and serves out markdown files from plugins.
 *
 * URLs in format like admin_plugin_text_file/<plugin_id>/filename.ext
 *
 * The only valid files are:
 *	* README.txt
 *	* CHANGES.txt
 *	* INSTALL.txt
 *	* COPYRIGHT.txt
 *	* LICENSE.txt
 *
 * @param type $page
 * @return bool
 * @access private
 */
function admin_markdown_page_handler($pages) {
	admin_gatekeeper();

	elgg_set_context('admin');

	elgg_unregister_css('elgg');
	elgg_load_js('elgg.admin');
	elgg_load_js('jquery.jeditable');
	elgg_load_library('elgg:markdown');

	$plugin_id = elgg_extract(0, $pages);
	$plugin = elgg_get_plugin_from_id($plugin_id);
	$filename = elgg_extract(1, $pages);

	$error = false;
	if (!$plugin) {
		$error = elgg_echo('admin:plugins:markdown:unknown_plugin');
		$body = elgg_view_layout('admin', array('content' => $error, 'title' => $error));
		echo elgg_view_page($title, $body, 'admin');
		return true;
	}

	$text_files = $plugin->getAvailableTextFiles();

	if (!array_key_exists($filename, $text_files)) {
		$error = elgg_echo('admin:plugins:markdown:unknown_file');
	}

	$file = $text_files[$filename];
	$file_contents = file_get_contents($file);

	if (!$file_contents) {
		$error = elgg_echo('admin:plugins:markdown:unknown_file');
	}

	if ($error) {
		$title = $error;
		$body = elgg_view_layout('admin', array('content' => $error, 'title' => $title));
		echo elgg_view_page($title, $body, 'admin');
		return true;
	}

	$title = $plugin->getManifest()->getName() . ": $filename";
	$text = Markdown($file_contents);

	$body = elgg_view_layout('admin', array(
		// setting classes here because there's no way to pass classes
		// to the layout
		'content' => '<div class="elgg-markdown">' . $text . '</div>',
		'title' => $title
	));
	
	echo elgg_view_page($title, $body, 'admin');
	return true;
}

/**
 * Adds default admin widgets to the admin dashboard.
 *
 * @return void
 * @access private
 */
function elgg_add_admin_widgets($event, $type, $user) {
	elgg_set_ignore_access(true);

	// check if the user already has widgets
	if (elgg_get_widgets($user->getGUID(), 'admin')) {
		return true;
	}

	// In the form column => array of handlers in order, top to bottom
	$adminWidgets = array(
		1 => array('control_panel', 'admin_welcome'),
		2 => array('online_users', 'new_users', 'content_stats'),
	);
	
	foreach ($adminWidgets as $column => $handlers) {
		foreach ($handlers as $position => $handler) {
			$guid = elgg_create_widget($user->getGUID(), $handler, 'admin');
			if ($guid) {
				$widget = get_entity($guid);
				$widget->move($column, $position);
			}
		}
	}
	elgg_set_ignore_access(false);
}

elgg_register_event_handler('init', 'system', 'admin_init');
elgg_register_event_handler('pagesetup', 'system', 'admin_pagesetup', 1000);