aboutsummaryrefslogtreecommitdiff
path: root/engine/lib/widgets.php
blob: 4a879e1ee1ef7b7fa5eb19b89c1649512bd4bb73 (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
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
<?php
/**
 * Elgg widgets library.
 * Contains code for handling widgets.
 *
 * @package Elgg.Core
 * @subpackage Widgets
 */

/**
 * Get widgets for a particular context
 *
 * The widgets are ordered for display and grouped in columns.
 * $widgets = elgg_get_widgets(get_loggedin_userid(), 'dashboard');
 * $first_column_widgets = $widgets[1];
 *
 * @param int    $user_guid The owner user GUID
 * @param string $context   The context (profile, dashboard, etc)
 * 
 * @return array|false An 2D array of ElggWidget objects or false
 * @since 1.8.0
 */
function elgg_get_widgets($user_guid, $context) {
	$options = array(
		'type' => 'object',
		'subtype' => 'widget',
		'owner_guid' => $user_guid,
		'private_setting_name' => 'context',
		'private_setting_value' => $context
	);
	$widgets = elgg_get_entities_from_private_settings($options);
	if (!$widgets) {
		return false;
	}

	$sorted_widgets = array();
	foreach ($widgets as $widget) {
		if (!isset($sorted_widgets[$widget->column])) {
			$sorted_widgets[$widget->column] = array();
		}
		$sorted_widgets[$widget->column][$widget->order] = $widget;
	}

	foreach ($sorted_widgets as $col => $widgets) {
		ksort($sorted_widgets[$col]);
	}

	return $sorted_widgets;
}

/**
 * Create a new widget instance
 *
 * @param int    $entity_guid GUID of entity that owns this widget
 * @param string $handler     The handler for this widget
 * @param int    $access_id   If not specified, it is set to the default access level
 * 
 * @return int|false Widget GUID or false on failure
 * @since 1.8
 */
function elgg_create_widget($owner_guid, $handler, $context, $access_id = null) {
	if (empty($owner_guid) || empty($handler) || !elgg_is_widget_type($handler)) {
		return false;
	}

	$owner = get_entity($owner_guid);
	if (!$owner) {
		return false;
	}

	$widget = new ElggWidget;
	$widget->owner_guid = $owner_guid;
	$widget->container_guid = $owner_guid; // @todo - will this work for group widgets
	if (isset($access_id)) {
		$widget->access_id = $access_id;
	} else {
		$widget->access_id = get_default_access();
	}

	if (!$widget->save()) {
		return false;
	}

	// private settings cannot be set until ElggWidget saved
	$widget->handler = $handler;
	$widget->context = $context;

	return $widget->getGUID();
}

/**
 * Can the user edit the widget layout
 *
 * Triggers a 'permissions_check', 'widget_layout' plugin hook
 *
 * @param string $context   The widget context
 * @param int    $user_guid The GUID of the user (0 for logged in user)
 *
 * @return bool
 * @since 1.8.0
 */
function elgg_can_edit_widget_layout($context, $user_guid = 0) {

	$user = get_entity((int)$user_guid);
	if (!$user) {
		$user = get_loggedin_user();
	}

	$return = false;
	if (isadminloggedin()) {
		$return = true;
	}
	if (elgg_get_page_owner_guid() == $user->guid) {
		$return = true;
	}

	$params = array(
		'user' => $user,
		'context' => $context,
		'page_owner' => elgg_get_page_owner()
	);
	return elgg_trigger_plugin_hook('permissions_check', 'widget_layout', $params, $return);
}

/**
 * Add a widget type
 *
 * This should be called by plugins in their init function.
 *
 * @param string $handler     The identifier for the widget handler
 * @param string $name        The name of the widget type
 * @param string $description A description for the widget type
 * @param string $context     A comma-separated list of contexts where this
 *                            widget is allowed (default: 'all')
 * @param bool   $multiple    Whether or not multiple instances of this widget
 *                            are allowed in a single layout (default: false)
 * 
 * @return bool
 * @since 1.8.0
 */
function elgg_add_widget_type($handler, $name, $description, $context = "all", $multiple = false) {

	if (!$handler || !$name) {
		return false;
	}

	global $CONFIG;

	if (!isset($CONFIG->widgets)) {
		$CONFIG->widgets = new stdClass;
	}
	if (!isset($CONFIG->widgets->handlers)) {
		$CONFIG->widgets->handlers = array();
	}

	$handlerobj = new stdClass;
	$handlerobj->name = $name;
	$handlerobj->description = $description;
	$handlerobj->context = explode(",", $context);
	$handlerobj->multiple = $multiple;

	$CONFIG->widgets->handlers[$handler] = $handlerobj;

	return true;
}

/**
 * Remove a widget type
 *
 * @param string $handler The identifier for the widget
 * 
 * @return void
 * @since 1.8.0
 */
function elgg_remove_widget_type($handler) {
	global $CONFIG;

	if (!isset($CONFIG->widgets)) {
		return;
	}

	if (!isset($CONFIG->widgets->handlers)) {
		return;
	}

	if (isset($CONFIG->widgets->handlers[$handler])) {
		unset($CONFIG->widgets->handlers[$handler]);
	}
}

/**
 * Has a widget type with the specified handler been registered
 *
 * @param string $handler The widget handler identifying string
 * 
 * @return bool Whether or not that widget type exists
 * @since 1.8.0
 */
function elgg_is_widget_type($handler) {
	global $CONFIG;

	if (!empty($CONFIG->widgets) &&
		!empty($CONFIG->widgets->handlers) &&
		is_array($CONFIG->widgets->handlers) &&
		array_key_exists($handler, $CONFIG->widgets->handlers)) {

		return true;
	}

	return false;
}

/**
 * Get the widget types for a context
 *
 * The widget types are stdClass objects.
 *
 * @param string context The widget context or empty string for current context
 * 
 * @return array
 * @since 1.8.0
 */
function elgg_get_widget_types($context = "") {
	global $CONFIG;

	if (empty($CONFIG->widgets) ||
		empty($CONFIG->widgets->handlers) ||
		!is_array($CONFIG->widgets->handlers)) {
		// no widgets
		return array();
	}

	if (!$context) {
		$context = elgg_get_context();
	}

	$widgets = array();
	foreach ($CONFIG->widgets->handlers as $key => $handler) {
		if (in_array('all', $handler->context) || in_array($context, $handler->context)) {
			$widgets[$key] = $handler;
		}
	}

	return $widgets;
}

/**
 * Regsiter entity of object, widget as ElggWidget objects
 *
 * @return void
 */
function elgg_widget_run_once() {
	add_subtype("object", "widget", "ElggWidget");
}

/**
 * Function to initialize widgets functionality
 *
 * @return void
 */
function elgg_widgets_init() {
	register_action('widgets/save');
	register_action('widgets/add');
	register_action('widgets/move');
	register_action('widgets/delete');

	run_function_once("elgg_widget_run_once");
}

elgg_register_event_handler('init', 'system', 'elgg_widgets_init');



/**
 * When given a widget entity and a new requested location, saves the new location
 * and also provides a sensible ordering for all widgets in that column
 *
 * @param ElggObject $widget The widget entity
 * @param int        $order  The order within the column
 * @param int        $column The column (1, 2 or 3)
 *
 * @return bool Depending on success
 * @deprecated 1.8 use ElggWidget::move()
 */
function save_widget_location(ElggObject $widget, $order, $column) {
	elgg_deprecated_notice('save_widget_location() is deprecated', 1.8);
	if ($widget instanceof ElggObject) {
		if ($widget->subtype == "widget") {
			// If you can't move the widget, don't save a new location
			if (!$widget->draggable) {
				return false;
			}

			// Sanitise the column value
			if ($column != 1 || $column != 2 || $column != 3) {
				$column = 1;
			}

			$widget->column = (int) $column;

			$ordertmp = array();
			$params = array(
				'context' => $widget->context,
				'column' => $column,
			);

			if ($entities = get_entities_from_metadata_multi($params, 'object', 'widget')) {
				foreach ($entities as $entity) {
					$entityorder = $entity->order;
					if ($entityorder < $order) {
						$ordertmp[$entityorder] = $entity;
					}
					if ($entityorder >= $order) {
						$ordertmp[$entityorder + 10000] = $entity;
					}
				}
			}

			$ordertmp[$order] = $widget;
			ksort($ordertmp);

			$orderticker = 10;
			foreach ($ordertmp as $orderval => $entity) {
				$entity->order = $orderticker;
				$orderticker += 10;
			}

			return true;
		} else {
			register_error($widget->subtype);
		}

	}

	return false;
}

/**
 * Get widgets for a particular context and column, in order of display
 *
 * @param int    $user_guid The owner user GUID
 * @param string $context   The context (profile, dashboard etc)
 * @param int    $column    The column (1 or 2)
 *
 * @return array|false An array of widget ElggObjects, or false
 * @deprecated 1.8 Use elgg_get_widgets()
 */
function get_widgets($user_guid, $context, $column) {
	elgg_deprecated_notice('get_widgets is depecated for elgg_get_widgets', 1.8);
	$params = array(
		'column' => $column,
		'context' => $context
	);
	$widgets = get_entities_from_private_setting_multi($params, "object",
		"widget", $user_guid, "", 10000);

	if ($widgets) {
		$widgetorder = array();
		foreach ($widgets as $widget) {
			$order = $widget->order;
			while (isset($widgetorder[$order])) {
				$order++;
			}
			$widgetorder[$order] = $widget;
		}

		ksort($widgetorder);

		return $widgetorder;
	}

	return false;
}

/**
 * Add a new widget instance
 *
 * @param int    $entity_guid GUID of entity that owns this widget
 * @param string $handler     The handler for this widget
 * @param string $context     The page context for this widget
 * @param int    $order       The order to display this widget in
 * @param int    $column      The column to display this widget in (1, 2 or 3)
 * @param int    $access_id   If not specified, it is set to the default access level
 *
 * @return int|false Widget GUID or false on failure
 * @deprecated 1.8 use elgg_create_widget()
 */
function add_widget($entity_guid, $handler, $context, $order = 0, $column = 1, $access_id = null) {
	elgg_deprecated_notice('add_widget has been deprecated for elgg_create_widget', 1.8);
	if (empty($entity_guid) || empty($context) || empty($handler) || !widget_type_exists($handler)) {
		return false;
	}

	if ($entity = get_entity($entity_guid)) {
		$widget = new ElggWidget;
		$widget->owner_guid = $entity_guid;
		$widget->container_guid = $entity_guid;
		if (isset($access_id)) {
			$widget->access_id = $access_id;
		} else {
			$widget->access_id = get_default_access();
		}

		$guid = $widget->save();

		// private settings cannot be set until ElggWidget saved
		$widget->handler = $handler;
		$widget->context = $context;
		$widget->column = $column;
		$widget->order = $order;

		return $guid;
	}

	return false;
}

/**
 * Define a new widget type
 *
 * @param string $handler     The identifier for the widget handler
 * @param string $name        The name of the widget type
 * @param string $description A description for the widget type
 * @param string $context     A comma-separated list of contexts where this
 *                            widget is allowed (default: 'all')
 * @param bool   $multiple    Whether or not multiple instances of this widget
 *                            are allowed on a single dashboard (default: false)
 * @param string $positions   A comma-separated list of positions on the page
 *                            (side or main) where this widget is allowed (default: "side,main")
 *
 * @return bool Depending on success
 * @deprecated 1.8
 */
function add_widget_type($handler, $name, $description, $context = "all",
$multiple = false, $positions = "side,main") {
	elgg_deprecated_notice("add_widget_type deprecated for elgg_add_widget_type", 1.8);

	return elgg_add_widget_type($handler, $name, $description, $context, $multiple);
}

/**
 * Remove a widget type
 *
 * @param string $handler The identifier for the widget handler
 *
 * @return void
 * @since 1.7.1
 * @deprecated 1.8
 */
function remove_widget_type($handler) {
	elgg_deprecated_notice("remove_widget_type deprecated for elgg_remove_widget_type", 1.8);
	return elgg_remove_widget_type($handler);
}

/**
 * Determines whether or not widgets with the specified handler have been defined
 *
 * @param string $handler The widget handler identifying string
 *
 * @return bool Whether or not those widgets exist
 * @deprecated 1.8
 */
function widget_type_exists($handler) {
	elgg_deprecated_notice("widget_type_exists deprecated for elgg_is_widget_type", 1.8);
	return elgg_is_widget_type($handler);
}

/**
 * Returns an array of stdClass objects representing the defined widget types
 *
 * @return array A list of types defined (if any)
 * @deprecated 1.8
 */
function get_widget_types() {
	elgg_deprecated_notice("get_widget_types deprecrated for elgg_get_widget_types", 1.8);
	return elgg_get_widget_types();
}

/**
 * Saves a widget's settings (by passing an array of
 * (name => value) pairs to save_{$handler}_widget)
 *
 * @param int   $widget_guid The GUID of the widget we're saving to
 * @param array $params      An array of name => value parameters
 *
 * @return bool
 * @deprecated 1.8
 */
function save_widget_info($widget_guid, $params) {
	elgg_deprecated_notice("save_widget_info() is deprecated for elgg_save_widget_settings", 1.8);
	if ($widget = get_entity($widget_guid)) {

		$subtype = $widget->getSubtype();

		if ($subtype != "widget") {
			return false;
		}
		$handler = $widget->handler;
		if (empty($handler) || !widget_type_exists($handler)) {
			return false;
		}

		if (!$widget->canEdit()) {
			return false;
		}

		// Save the params to the widget
		if (is_array($params) && sizeof($params) > 0) {
			foreach ($params as $name => $value) {

				if (!empty($name) && !in_array($name, array(
					'guid', 'owner_guid', 'site_guid'
				))) {
					if (is_array($value)) {
						// @todo Handle arrays securely
						$widget->setMetaData($name, $value, "", true);
					} else {
						$widget->$name = $value;
					}
				}
			}
			$widget->save();
		}

		$function = "save_{$handler}_widget";
		if (is_callable($function)) {
			return $function($params);
		}

		return true;
	}

	return false;
}

/**
 * Reorders the widgets from a widget panel
 *
 * @param string $panelstring1 String of guids of ElggWidget objects separated by ::
 * @param string $panelstring2 String of guids of ElggWidget objects separated by ::
 * @param string $panelstring3 String of guids of ElggWidget objects separated by ::
 * @param string $context      Profile or dashboard
 * @param int    $owner        Owner guid
 *
 * @return void
 * @deprecated 1.8
 */
function reorder_widgets_from_panel($panelstring1, $panelstring2, $panelstring3, $context, $owner) {
	elgg_deprecated_notice("reorder_widgets_from_panel() is deprecated", 1.8);
	$return = true;

	$mainwidgets = explode('::', $panelstring1);
	$sidewidgets = explode('::', $panelstring2);
	$rightwidgets = explode('::', $panelstring3);

	$handlers = array();
	$guids = array();

	if (is_array($mainwidgets) && sizeof($mainwidgets) > 0) {
		foreach ($mainwidgets as $widget) {

			$guid = (int) $widget;

			if ("{$guid}" == "{$widget}") {
				$guids[1][] = $widget;
			} else {
				$handlers[1][] = $widget;
			}
		}
	}
	if (is_array($sidewidgets) && sizeof($sidewidgets) > 0) {
		foreach ($sidewidgets as $widget) {

			$guid = (int) $widget;

			if ("{$guid}" == "{$widget}") {
				$guids[2][] = $widget;
			} else {
				$handlers[2][] = $widget;
			}

		}
	}
	if (is_array($rightwidgets) && sizeof($rightwidgets) > 0) {
		foreach ($rightwidgets as $widget) {

			$guid = (int) $widget;

			if ("{$guid}" == "{$widget}") {
				$guids[3][] = $widget;
			} else {
				$handlers[3][] = $widget;
			}

		}
	}

	// Reorder existing widgets or delete ones that have vanished
	foreach (array(1, 2, 3) as $column) {
		if ($dbwidgets = get_widgets($owner, $context, $column)) {

			foreach ($dbwidgets as $dbwidget) {
				if (in_array($dbwidget->getGUID(), $guids[1])
				|| in_array($dbwidget->getGUID(), $guids[2]) || in_array($dbwidget->getGUID(), $guids[3])) {

					if (in_array($dbwidget->getGUID(), $guids[1])) {
						$pos = array_search($dbwidget->getGUID(), $guids[1]);
						$col = 1;
					} else if (in_array($dbwidget->getGUID(), $guids[2])) {
						$pos = array_search($dbwidget->getGUID(), $guids[2]);
						$col = 2;
					} else {
						$pos = array_search($dbwidget->getGUID(), $guids[3]);
						$col = 3;
					}
					$pos = ($pos + 1) * 10;
					$dbwidget->column = $col;
					$dbwidget->order = $pos;
				} else {
					$dbguid = $dbwidget->getGUID();
					if (!$dbwidget->delete()) {
						$return = false;
					} else {
						// Remove state cookie
						setcookie('widget' + $dbguid, null);
					}
				}
			}

		}
		// Add new ones
		if (sizeof($guids[$column]) > 0) {
			foreach ($guids[$column] as $key => $guid) {
				if ($guid == 0) {
					$pos = ($key + 1) * 10;
					$handler = $handlers[$column][$key];
					if (!add_widget($owner, $handler, $context, $pos, $column)) {
						$return = false;
					}
				}
			}
		}
	}

	return $return;
}

/**
 * Register a particular context for use with widgets.
 *
 * @param string $context The context we wish to enable context for
 *
 * @return void
 * @deprecated 1.8
 */
function use_widgets($context) {
	elgg_deprecated_notice("use_widgets is deprecated", 1.8);
	global $CONFIG;

	if (!isset($CONFIG->widgets)) {
		$CONFIG->widgets = new stdClass;
	}

	if (!isset($CONFIG->widgets->contexts)) {
		$CONFIG->widgets->contexts = array();
	}

	if (!empty($context)) {
		$CONFIG->widgets->contexts[] = $context;
	}
}

/**
 * Determines whether or not the current context is using widgets
 *
 * @return bool Depending on widget status
 * @deprecated 1.8
 */
function using_widgets() {
	elgg_deprecated_notice("using_widgets is deprecated", 1.8);
	global $CONFIG;

	$context = elgg_get_context();
	if (isset($CONFIG->widgets->contexts) && is_array($CONFIG->widgets->contexts)) {
		if (in_array($context, $CONFIG->widgets->contexts)) {
			return true;
		}
	}

	return false;
}

/**
 * @deprecated 1.8
 */
function display_widget(ElggObject $widget) {
	elgg_deprecated_notice("display_widget() was been deprecated. Use elgg_view_entity().", 1.8);
	return elgg_view_entity($widget);
}