summaryrefslogtreecommitdiffstats
path: root/handlers/views_handler_argument.inc
blob: 6458722bd155ea7ce949c1871350f0ed236e8a67 (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
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
<?php
// $Id$

/**
 * @defgroup views_argument_handlers Handlers for arguments
 * @{
 */

/**
 * Base class for arguments.
 *
 * The basic argument works for very simple arguments such as nid and uid
 *
 * Definition terms for this handler:
 * - name field: The field to use for the name to use in the summary, which is
 *               the displayed output. For example, for the node: nid argument,
 *               the argument itself is the nid, but node.title is displayed.
 * - name table: The table to use for the name, should it not be in the same
 *               table as the argument.
 * - empty field name: For arguments that can have no value, such as taxonomy
 *                     which can have "no term", this is the string which
 *                     will be displayed for this lack of value. Be sure to use
 *                     t().
 * - validate type: A little used string to allow an argument to restrict
 *                  which validator is available to just one. Use the
 *                  validator ID. This probably should not be used at all,
 *                  and may disappear or change.
 * - numeric: If set to TRUE this field is numeric and will use %d instead of
 *            %s in queries.
 *
 * @ingroup views_argument_handlers
 */
class views_handler_argument extends views_handler {
  var $name_field = NULL;
  /**
   * Constructor
   */
  function construct() {
    parent::construct();

    if (!empty($this->definition['name field'])) {
      $this->name_field = $this->definition['name field'];
    }
    if (!empty($this->definition['name table'])) {
      $this->name_table = $this->definition['name table'];
    }
  }

  function init(&$view, &$options) {
    parent::init($view, $options);
  }

  /**
   * Give an argument the opportunity to modify the breadcrumb, if it wants.
   * This only gets called on displays where a breadcrumb is actually used.
   *
   * The breadcrumb will be in the form of an array, with the keys being
   * the path and the value being the already sanitized title of the path.
   */
  function set_breadcrumb(&$breadcrumb) { }

  /**
   * Determine if the argument can generate a breadcrumb
   *
   * @return TRUE/FALSE
   */
  function uses_breadcrumb() {
    $info = $this->default_actions($this->options['default_action']);
    return !empty($info['breadcrumb']);
  }

  function is_wildcard($arg = NULL) {
    if (!isset($arg)) {
      $arg = $this->argument;
    }

    return !empty($this->options['wildcard']) && $this->options['wildcard'] === $arg;
  }

  function wildcard_title() {
    return $this->options['wildcard_substitution'];
  }

  /**
   * Determine if the argument needs a style plugin.
   *
   * @return TRUE/FALSE
   */
  function needs_style_plugin() {
    $info = $this->default_actions($this->options['default_action']);
    $validate_info = $this->default_actions($this->options['validate_fail']);
    return !empty($info['style plugin']) || !empty($validate_info['style plugin']);
  }

  function option_definition() {
    $options = parent::option_definition();

    $options['default_action'] = array('default' => 'ignore');
    $options['style_plugin'] = array('default' => 'default_summary');
    $options['style_options'] = array('default' => array());
    $options['wildcard'] = array('default' => 'all');
    $options['wildcard_substitution'] = array('default' => t('All'), 'translatable' => TRUE);
    $options['title'] = array('default' => '', 'translatable' => TRUE);
    $options['default_argument_type'] = array('default' => 'fixed');
    $options['default_argument'] = array('default' => '');
    $options['validate_type'] = array('default' => 'none');
    $options['validate_fail'] = array('default' => 'not found');

    return $options;
  }

  function options_form(&$form, &$form_state) {
    $defaults = $this->default_actions();

    $form['title'] = array(
      '#prefix' => '<div class="clear-block">',
      '#suffix' => '</div>',
      '#type' => 'textfield',
      '#title' => t('Title'),
      '#default_value' => $this->options['title'],
      '#description' => t('The title to use when this argument is present. It will override the title of the view and titles from previous arguments. You can use percent substitution here to replace with argument titles. Use "%1" for the first argument, "%2" for the second, etc.'),
    );

    $form['clear_start'] = array(
      '#value' => '<div class="clear-block">',
    );

    $form['defaults_start'] = array(
      '#value' => '<div class="views-left-50">',
    );

    $form['default_action'] = array(
      '#type' => 'radios',
      '#title' => t('Action to take if argument is not present'),
      '#default_value' => $this->options['default_action'],
    );

    $form['defaults_stop'] = array(
      '#value' => '</div>',
    );

    $form['wildcard'] = array(
      '#prefix' => '<div class="views-right-50">',
      // prefix and no suffix means these two items will be grouped together.
      '#type' => 'textfield',
      '#title' => t('Wildcard'),
      '#size' => 20,
      '#default_value' => $this->options['wildcard'],
      '#description' => t('If this value is received as an argument, the argument will be ignored; i.e, "all values"'),
    );

    $form['wildcard_substitution'] = array(
      '#suffix' => '</div>',
      '#type' => 'textfield',
      '#title' => t('Wildcard title'),
      '#size' => 20,
      '#default_value' => $this->options['wildcard_substitution'],
      '#description' => t('The title to use for the wildcard in substitutions elsewhere.'),
    );

    $form['clear_stop'] = array(
      '#value' => '</div>',
    );

    $options = array();
    $validate_options = array();
    foreach ($defaults as $id => $info) {
      $options[$id] = $info['title'];
      if (empty($info['default only'])) {
        $validate_options[$id] = $info['title'];
      }
      if (!empty($info['form method'])) {
        $this->{$info['form method']}($form, $form_state);
      }
    }

    $form['default_action']['#options'] = $options;

    $form['validate_options_div_prefix'] = array(
      '#id' => 'views-validator-options',
      '#value' => '<fieldset id="views-validator-options"><legend>' . t('Validator options') . '</legend>',
    );

    $form['validate_type'] = array(
      '#type' => 'select',
      '#title' => t('Validator'),
      '#default_value' => $this->options['validate_type'],
    );

    $validate_types = array('none' => t('<Basic validation>'));
    $plugins = views_fetch_plugin_data('argument validator');
    foreach ($plugins as $id => $info) {
      if (!empty($info['no ui'])) {
        continue;
      }

      $valid = TRUE;
      if (!empty($info['type'])) {
        $valid = FALSE;
        if (empty($this->definition['validate type'])) {
          continue;
        }
        foreach ((array) $info['type'] as $type) {
          if ($type == $this->definition['validate type']) {
            $valid = TRUE;
            break;
          }
        }
      }

      // If we decide this validator is ok, add it to the list.
      if ($valid) {
        $plugin = views_get_plugin('argument validator', $id);
        if ($plugin) {
          $plugin->init($this->view, $this, $id);
          if ($plugin->access() || $this->options['validate_type'] == $id) {
            $plugin->validate_form($form, $form_state, $id);
            $validate_types[$id] = $info['title'];
          }
        }
      }
    }

    asort($validate_types);
    $form['validate_type']['#options'] = $validate_types;

    $form['validate_fail'] = array(
      '#type' => 'select',
      '#title' => t('Action to take if argument does not validate'),
      '#default_value' => $this->options['validate_fail'],
      '#options' => $validate_options,
    );

    $form['validate_options_div_suffix'] = array(
      '#value' => '</fieldset>',
    );
  }

  /**
   * Provide a list of default behaviors for this argument if the argument
   * is not present.
   *
   * Override this method to provide additional (or fewer) default behaviors.
   */
  function default_actions($which = NULL) {
    $defaults = array(
      'ignore' => array(
        'title' => t('Display all values'),
        'method' => 'default_ignore',
        'breadcrumb' => TRUE, // generate a breadcrumb to here
      ),
      'not found' => array(
        'title' => t('Hide view / Page not found (404)'),
        'method' => 'default_not_found',
        'hard fail' => TRUE, // This is a hard fail condition
      ),
      'empty' => array(
        'title' => t('Display empty text'),
        'method' => 'default_empty',
        'breadcrumb' => TRUE, // generate a breadcrumb to here
      ),
      'summary asc' => array(
        'title' => t('Summary, sorted ascending'),
        'method' => 'default_summary',
        'method args' => array('asc'),
        'style plugin' => TRUE,
        'breadcrumb' => TRUE, // generate a breadcrumb to here
      ),
      'summary desc' => array(
        'title' => t('Summary, sorted descending'),
        'method' => 'default_summary',
        'method args' => array('desc'),
        'style plugin' => TRUE,
        'breadcrumb' => TRUE, // generate a breadcrumb to here
      ),
      'default' => array(
        'title' => t('Provide default argument'),
        'method' => 'default_default',
        'form method' => 'default_argument_form',
        'has default argument' => TRUE,
        'default only' => TRUE, // this can only be used for missing argument, not validation failure
      ),
    );

    if ($which) {
      if (!empty($defaults[$which])) {
        return $defaults[$which];
      }
    }
    else {
      return $defaults;
    }
  }

  /**
   * Provide a form for selecting the default argument when the
   * default action is set to provide default argument.
   */
  function default_argument_form(&$form, &$form_state) {
    $plugins = views_fetch_plugin_data('argument default');
    $options = array();

    // This construct uses 'hidden' and not markup because process doesn't
    // run. It also has an extra div because the dependency wants to hide
    // the parent in situations like this, so we need a second div to
    // make this work.
    $form['default_options_div_prefix'] = array(
      '#type' => 'hidden',
      '#id' => 'views-default-options',
      '#prefix' => '<div><fieldset id="views-default-options"><legend>' . t('Provide default argument options') . '</legend>',
      '#process' => array('views_process_dependency'),
      '#dependency' => array('radio:options[default_action]' => array('default')),
    );

    $form['default_argument_type'] = array(
      '#prefix' => '<div id="edit-options-default-argument-type-wrapper">',
      '#suffix' => '</div>',
      '#type' => 'radios',
      '#id' => 'edit-options-default-argument-type',
      '#title' => t('Default argument type'),
      '#default_value' => $this->options['default_argument_type'],
      '#process' => array('expand_radios', 'views_process_dependency'),
      '#dependency' => array('radio:options[default_action]' => array('default')),
    );

    foreach ($plugins as $id => $info) {
      $plugin = views_get_plugin('argument default', $id);
      if ($plugin) {
        $plugin->init($this->view, $this, $id);

        if ($plugin->access() || $this->options['default_argument_type'] == $id) {
          $options[$id] = $info['title'];
          $plugin->argument_form($form, $form_state);
        }
      }
    }

    $form['default_options_div_suffix'] = array(
      '#value' => '</fieldset></div>',
    );

    asort($options);
    $form['default_argument_type']['#options'] = $options;
  }

  /**
   * Handle the default action, which means our argument wasn't present.
   *
   * Override this method only with extreme care.
   *
   * @return
   *   A boolean value; if TRUE, continue building this view. If FALSE,
   *   building the view will be aborted here.
   */
  function default_action($info = NULL) {
    if (!isset($info)) {
      $info = $this->default_actions($this->options['default_action']);
    }

    if (!$info) {
      return FALSE;
    }

    if (!empty($info['method args'])) {
      return call_user_func_array(array(&$this, $info['method']), $info['method args']);
    }
    else {
      return $this->{$info['method']}();
    }
  }

  /**
   * How to act if validation failes
   */
  function validate_fail() {
    $info = $this->default_actions($this->options['validate_fail']);
    return $this->default_action($info);
  }
  /**
   * Default action: ignore.
   *
   * If an argument was expected and was not given, in this case, simply
   * ignore the argument entirely.
   */
  function default_ignore() {
    return TRUE;
  }

  /**
   * Default action: not found.
   *
   * If an argument was expected and was not given, in this case, report
   * the view as 'not found' or hide it.
   */
  function default_not_found() {
    // Set a failure condition and let the display manager handle it.
    $this->view->build_info['fail'] = TRUE;
    return FALSE;
  }

  /**
   * Default action: empty
   *
   * If an argument was expected and was not given, in this case, display
   * the view's empty text
   */
  function default_empty() {
    // We return with no query; this will force the empty text.
    $this->view->built = TRUE;
    $this->view->executed = TRUE;
    $this->view->result = array();
    return FALSE;
  }

  /**
   * This just returns true. The view argument builder will know where
   * to find the argument from.
   */
  function default_default() {
    return TRUE;
  }

  /**
   * Determine if the argument is set to provide a default argument.
   */
  function has_default_argument() {
    $info = $this->default_actions($this->options['default_action']);
    return !empty($info['has default argument']);
  }

  /**
   * Get a default argument, if available.
   */
  function get_default_argument() {
    $plugin = views_get_plugin('argument default', $this->options['default_argument_type']);
    if ($plugin) {
      $plugin->init($this->view, $this);
      return $plugin->get_argument();
    }
  }

  /**
   * Default action: summary.
   *
   * If an argument was expected and was not given, in this case, display
   * a summary query.
   */
  function default_summary($order) {
    $this->view->build_info['summary'] = TRUE;
    $this->view->build_info['summary_level'] = $this->options['id'];

    // Change the display style to the summary style for this
    // argument.
    $this->view->plugin_name = $this->options['style_plugin'];
    $this->view->style_options = $this->options['style_options'];

    // Clear out the normal primary field and whatever else may have
    // been added and let the summary do the work.
    $this->query->clear_fields();
    $this->summary_query();

    $this->summary_sort($order);

    // Summaries have their own sorting and fields, so tell the View not
    // to build these.
    $this->view->build_sort = $this->view->build_fields = FALSE;
    return TRUE;
  }

  /**
   * Build the info for the summary query.
   *
   * This must:
   * - add_groupby: group on this field in order to create summaries.
   * - add_field: add a 'num_nodes' field for the count. Usually it will
   *   be a count on $view->base_field
   * - set_count_field: Reset the count field so we get the right paging.
   *
   * @return
   *   The alias used to get the number of records (count) for this entry.
   */
  function summary_query() {
    $this->ensure_my_table();
    // Add the field.
    $this->base_alias = $this->query->add_field($this->table_alias, $this->real_field);

    $this->summary_name_field();
    return $this->summary_basics();
  }

  /**
   * Add the name field, which is the field displayed in summary queries.
   * This is often used when the argument is numeric.
   */
  function summary_name_field() {
    // Add the 'name' field. For example, if this is a uid argument, the
    // name field would be 'name' (i.e, the username).

    if (isset($this->name_table)) {
      // if the alias is different then we're probably added, not ensured,
      // so look up the join and add it instead.
      if ($this->table_alias != $this->table) {
        $j = views_get_table_join($this->name_table, $this->table);
        if ($j) {
          $join = drupal_clone($j);
          $join->left_table = $this->table_alias;
          $this->name_table_alias = $this->query->add_table($this->name_table, $this->relationship, $join);
        }
      }
      else {
        $this->name_table_alias = $this->query->ensure_table($this->name_table, $this->relationship);
      }
    }
    else {
      $this->name_table_alias = $this->table_alias;
    }

    if (isset($this->name_field)) {
      $this->name_alias = $this->query->add_field($this->name_table_alias, $this->name_field);
    }
    else {
      $this->name_alias = $this->base_alias;
    }
  }

  /**
   * Some basic summary behavior that doesn't need to be repeated as much as
   * code that goes into summary_query()
   */
  function summary_basics($count_field = TRUE) {
    // Add the number of nodes counter
    $field = $this->query->base_table . '.' . $this->query->base_field;
    $distinct = ($this->view->display_handler->get_option('distinct') && empty($this->query->no_distinct));

    $count_alias = $this->query->add_field(NULL, $field, 'num_records',
                                           array('count' => TRUE, 'distinct' => $distinct));
    $this->query->add_groupby($this->name_alias);

    if ($count_field) {
      $this->query->set_count_field($this->table_alias, $this->real_field);
    }

    $this->count_alias = $count_alias;
  }

  /**
   * Sorts the summary based upon the user's selection. The base variant of
   * this is usually adequte.
   *
   * @param $order
   *   The order selected in the UI.
   */
  function summary_sort($order) {
    $this->query->add_orderby(NULL, NULL, $order, $this->name_alias);
  }

  /**
   * Provide the argument to use to link from the summary to the next level;
   * this will be called once per row of a summary, and used as part of
   * $view->get_url().
   *
   * @param $data
   *   The query results for the row.
   */
  function summary_argument($data) {
    return $data->{$this->base_alias};
  }

  /**
   * Provides the name to use for the summary. By default this is just
   * the name field.
   *
   * @param $data
   *   The query results for the row.
   */
  function summary_name($data) {
    $value = $data->{$this->name_alias};
    if (empty($value) && !empty($this->definition['empty field name'])) {
      $value = $this->definition['empty field name'];
    }
    return check_plain($value);
  }

  /**
   * Set up the query for this argument.
   *
   * The argument sent may be found at $this->argument.
   */
  function query() {
    $this->ensure_my_table();
    $placeholder = empty($this->definition['numeric']) ? "'%s'" : '%d';
    $this->query->add_where(0, "$this->table_alias.$this->real_field = $placeholder", $this->argument);
  }

  /**
   * Get the title this argument will assign the view, given the argument.
   *
   * This usually needs to be overridden to provide a proper title.
   */
  function title() {
    return check_plain($this->argument);
  }

  /**
   * Called by the view object to get the title. This may be set by a
   * validator so we don't necessarily call through to title().
   */
  function get_title() {
    if (isset($this->validated_title)) {
      return $this->validated_title;
    }
    else {
      return $this->title();
    }
  }

  /**
   * Validate that this argument works. By default, all arguments are valid.
   */
  function validate_arg($arg) {
    // By using % in URLs, arguments could be validated twice; this eases
    // that pain.
    if (isset($this->argument_validated)) {
      return $this->argument_validated;
    }

    if ($this->is_wildcard($arg)) {
      return $this->argument_validated = TRUE;
    }

    if ($this->options['validate_type'] == 'none') {
      return $this->argument_validated = $this->validate_argument_basic($arg);
    }

    $plugin = views_get_plugin('argument validator', $this->options['validate_type']);
    if ($plugin) {
      $plugin->init($this->view, $this, $this->options['validate_type']);
      return $this->argument_validated = $plugin->validate_argument($arg);
    }

    // If the plugin isn't found, fall back to the basic validation path:
    return $this->argument_validated = $this->validate_argument_basic($arg);
  }

  /**
   * Called by the menu system to validate an argument.
   *
   * This checks to see if this is a 'soft fail', which means that if the
   * argument fails to validate, but there is an action to take anyway,
   * then validation cannot actually fail.
   */
  function validate_argument($arg) {
    $validate_info = $this->default_actions($this->options['validate_fail']);
    if (empty($validate_info['hard fail'])) {
      return TRUE;
    }

    $rc = $this->validate_arg($arg);

    // If the validator has changed the validate fail condition to a
    // soft fail, deal with that:
    $validate_info = $this->default_actions($this->options['validate_fail']);
    if (empty($validate_info['hard fail'])) {
      return TRUE;
    }

    return $rc;
  }

  /**
   * Provide a basic argument validation.
   *
   * This can be overridden for more complex types; the basic
   * validator only checks to see if the argument is not NULL
   * or is numeric if the definition says it's numeric.
   */
  function validate_argument_basic($arg) {
    if (!isset($arg) || $arg === '') {
      return FALSE;
    }

    if (isset($this->definition['numeric']) && !isset($this->options['break_phrase']) && !is_numeric($arg)) {
      return FALSE;
    }

    return TRUE;
  }

  /**
   * Set the input for this argument
   *
   * @return TRUE if it successfully validates; FALSE if it does not.
   */
  function set_argument($arg) {
    $this->argument = $arg;
    return $this->validate_arg($arg);
  }

  /**
   * Get the value of this argument.
   */
  function get_value() {
    // If we already processed this argument, we're done.
    if (isset($this->argument)) {
      return $this->argument;
    }
    
    // Otherwise, we have to pretend to process ourself to find the value.
    $value = NULL;
    // Find the position of this argument within the view.
    $position = 0;
    foreach ($this->view->argument as $id => $argument) {
      if ($id == $this->options['id']) {
        break;
      }
      $position++;
    }

    $arg = isset($this->view->args[$position]) ? $this->view->args[$position] : NULL;
    $this->position = $position;

    // Clone ourselves so that we don't break things when we're really
    // processing the arguments.
    $argument = drupal_clone($this);
    if (!isset($arg) && $argument->has_default_argument()) {
      $arg = $argument->get_default_argument();
    }
    // Set the argument, which will also validate that the argument can be set.
    if ($argument->set_argument($arg)) {
      $value = $argument->argument;
    }
    unset($argument);
    return $value;
  }
}

/**
 * A special handler to take the place of missing or broken handlers.
 *
 * @ingroup views_argument_handlers
 */
class views_handler_argument_broken extends views_handler_argument {
  function ui_name() {
    return t('Broken/missing handler');
  }

  function ensure_my_table() { /* No table to ensure! */ }
  function query() { /* No query to run */ }
  function options_form(&$form, &$form_state) {
    $form['markup'] = array(
      '#prefix' => '<div class="form-item description">',
      '#value' => t('The handler for this item is broken or missing and cannot be used. If a module provided the handler and was disabled, re-enabling the module may restore it. Otherwise, you should probably delete this item.'),
    );
  }

  /**
   * Determine if the handler is considered 'broken'
   */
  function broken() { return TRUE; }
}

/**
 * @}
 */