aboutsummaryrefslogtreecommitdiffstats
path: root/include/functions_category.inc.php
blob: f22e529dde08d4a4b80816d674f3fec6ac66076c (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
<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery                                    |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2014 Piwigo Team                  http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation                                          |
// |                                                                       |
// | 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      |
// | General Public License for more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+

/**
 * @package functions\category
 */


/**
 * Callback used for sorting by global_rank
 */
function global_rank_compare($a, $b)
{
  return strnatcasecmp($a['global_rank'], $b['global_rank']);
}

/**
 * Callback used for sorting by rank
 */
function rank_compare($a, $b)
{
  return $a['rank'] - $b['rank'];
}

/**
 * Is the category accessible to the connected user ?
 * If the user is not authorized to see this category, script exits
 *
 * @param int $category_id
 */
function check_restrictions($category_id)
{
  global $user;

  // $filter['visible_categories'] and $filter['visible_images']
  // are not used because it's not necessary (filter <> restriction)
  if (in_array($category_id, explode(',', $user['forbidden_categories'])))
  {
    access_denied();
  }
}

/**
 * Returns template vars for main categories menu.
 *
 * @return array[]
 */
function get_categories_menu()
{
  global $page, $user, $filter, $conf;

  $query = '
SELECT ';
  // From CATEGORIES_TABLE
  $query.= '
  id, name, permalink, nb_images, global_rank,';
  // From USER_CACHE_CATEGORIES_TABLE
  $query.= '
  date_last, max_date_last, count_images, count_categories';

  // $user['forbidden_categories'] including with USER_CACHE_CATEGORIES_TABLE
  $query.= '
FROM '.CATEGORIES_TABLE.' INNER JOIN '.USER_CACHE_CATEGORIES_TABLE.'
  ON id = cat_id and user_id = '.$user['id'];

  // Always expand when filter is activated
  if (!$user['expand'] and !$filter['enabled'])
  {
    $where = '
(id_uppercat is NULL';
    if (isset($page['category']))
    {
      $where .= ' OR id_uppercat IN ('.$page['category']['uppercats'].')';
    }
    $where .= ')';
  }
  else
  {
    $where = '
  '.get_sql_condition_FandF
    (
      array
        (
          'visible_categories' => 'id',
        ),
      null,
      true
    );
  }

  $where = trigger_event('get_categories_menu_sql_where',
    $where, $user['expand'], $filter['enabled'] );

  $query.= '
WHERE '.$where.'
;';

  $result = pwg_query($query);
  $cats = array();
  $selected_category = isset($page['category']) ? $page['category'] : null;
  while ($row = pwg_db_fetch_assoc($result))
  {
    $child_date_last = @$row['max_date_last']> @$row['date_last'];
    $row = array_merge($row,
      array(
        'NAME' => trigger_event(
          'render_category_name',
          $row['name'],
          'get_categories_menu'
          ),
        'TITLE' => get_display_images_count(
          $row['nb_images'],
          $row['count_images'],
          $row['count_categories'],
          false,
          ' / '
          ),
        'URL' => make_index_url(array('category' => $row)),
        'LEVEL' => substr_count($row['global_rank'], '.') + 1,
        'SELECTED' => $selected_category['id'] == $row['id'] ? true : false,
        'IS_UPPERCAT' => $selected_category['id_uppercat'] == $row['id'] ? true : false,
        )
      );
    if ($conf['index_new_icon'])
    {
      $row['icon_ts'] = get_icon($row['max_date_last'], $child_date_last);
    }
    $cats[] = $row;
    if ($row['id']==@$page['category']['id']) //save the number of subcats for later optim
      $page['category']['count_categories'] = $row['count_categories'];
  }
  usort($cats, 'global_rank_compare');

  // Update filtered data
  if (function_exists('update_cats_with_filtered_data'))
  {
    update_cats_with_filtered_data($cats);
  }

  return $cats;
}

/**
 * Retrieves informations about a category.
 *
 * @param int $id
 * @return array
 */
function get_cat_info($id)
{
  $query = '
SELECT *
  FROM '.CATEGORIES_TABLE.'
  WHERE id = '.$id.'
;';
  $cat = pwg_db_fetch_assoc(pwg_query($query));
  if (empty($cat))
    return null;

  foreach ($cat as $k => $v)
  {
    // If the field is true or false, the variable is transformed into a
    // boolean value.
    if ($cat[$k] == 'true' or $cat[$k] == 'false')
    {
      $cat[$k] = get_boolean( $cat[$k] );
    }
  }

  $upper_ids = explode(',', $cat['uppercats']);
  if ( count($upper_ids)==1 )
  {// no need to make a query for level 1
    $cat['upper_names'] = array(
        array(
          'id' => $cat['id'],
          'name' => $cat['name'],
          'permalink' => $cat['permalink'],
          )
      );
  }
  else
  {
    $query = '
  SELECT id, name, permalink
    FROM '.CATEGORIES_TABLE.'
    WHERE id IN ('.$cat['uppercats'].')
  ;';
    $names = query2array($query, 'id');

    // category names must be in the same order than uppercats list
    $cat['upper_names'] = array();
    foreach ($upper_ids as $cat_id)
    {
      $cat['upper_names'][] = $names[$cat_id];
    }
  }
  return $cat;
}

/**
 * Returns an array of image orders available for users/visitors.
 * Each entry is an array containing
 *  0: name
 *  1: SQL ORDER command
 *  2: visiblity (true or false)
 *
 * @return array[]
 */
function get_category_preferred_image_orders()
{
  global $conf, $page;

  return trigger_event('get_category_preferred_image_orders', array(
    array(l10n('Default'),                        '',                     true),
    array(l10n('Photo title, A &rarr; Z'),        'name ASC',             true),
    array(l10n('Photo title, Z &rarr; A'),        'name DESC',            true),
    array(l10n('Date created, new &rarr; old'),   'date_creation DESC',   true),
    array(l10n('Date created, old &rarr; new'),   'date_creation ASC',    true),
    array(l10n('Date posted, new &rarr; old'),    'date_available DESC',  true),
    array(l10n('Date posted, old &rarr; new'),    'date_available ASC',   true),
    array(l10n('Rating score, high &rarr; low'),  'rating_score DESC',    $conf['rate']),
    array(l10n('Rating score, low &rarr; high'),  'rating_score ASC',     $conf['rate']),
    array(l10n('Visits, high &rarr; low'),        'hit DESC',             true),
    array(l10n('Visits, low &rarr; high'),        'hit ASC',              true),
    array(l10n('Permissions'),                    'level DESC',           is_admin()),
    ));
}

/**
 * Assign a template var useable with {html_options} from a list of categories
 *
 * @param array[] $categories (at least id,name,global_rank,uppercats for each)
 * @param int[] $selected ids of selected items
 * @param string $blockname variable name in template
 * @param bool $fullname full breadcrumb or not
 */
function display_select_categories($categories,
                                   $selecteds,
                                   $blockname,
                                   $fullname = true)
{
  global $template;

  $tpl_cats = array();
  foreach ($categories as $category)
  {
    if ($fullname)
    {
      $option = strip_tags(
        get_cat_display_name_cache(
          $category['uppercats'],
          null
          )
        );
    }
    else
    {
      $option = str_repeat('&nbsp;',
                           (3 * substr_count($category['global_rank'], '.')));
      $option.= '- ';
      $option.= strip_tags(
        trigger_event(
          'render_category_name',
          $category['name'],
          'display_select_categories'
          )
        );
    }
    $tpl_cats[ $category['id'] ] = $option;
  }

  $template->assign( $blockname, $tpl_cats);
  $template->assign( $blockname.'_selected', $selecteds);
}

/**
 * Same as display_select_categories but categories are ordered by rank
 * @see display_select_categories()
 */
function display_select_cat_wrapper($query,
                                    $selecteds,
                                    $blockname,
                                    $fullname = true)
{
  $categories = query2array($query);
  usort($categories, 'global_rank_compare');
  display_select_categories($categories, $selecteds, $blockname, $fullname);
}

/**
 * Returns all subcategory identifiers of given category ids
 *
 * @param int[] $ids
 * @return int[]
 */
function get_subcat_ids($ids)
{
  $query = '
SELECT DISTINCT(id)
  FROM '.CATEGORIES_TABLE.'
  WHERE ';
  foreach ($ids as $num => $category_id)
  {
    is_numeric($category_id)
      or trigger_error(
        'get_subcat_ids expecting numeric, not '.gettype($category_id),
        E_USER_WARNING
      );
    if ($num > 0)
    {
      $query.= '
    OR ';
    }
    $query.= 'uppercats '.DB_REGEX_OPERATOR.' \'(^|,)'.$category_id.'(,|$)\'';
  }
  $query.= '
;';
  return array_from_query($query, 'id');
}

/**
 * Finds a matching category id from a potential list of permalinks
 *
 * @param string[] $permalinks
 * @param int &$idx filled with the index in $permalinks that matches
 * @return int|null
 */
function get_cat_id_from_permalinks($permalinks, &$idx)
{
  $in = '';
  foreach($permalinks as $permalink)
  {
    if ( !empty($in) ) $in.=', ';
    $in .= '\''.$permalink.'\'';
  }
  $query ='
SELECT cat_id AS id, permalink, 1 AS is_old
  FROM '.OLD_PERMALINKS_TABLE.'
  WHERE permalink IN ('.$in.')
UNION
SELECT id, permalink, 0 AS is_old
  FROM '.CATEGORIES_TABLE.'
  WHERE permalink IN ('.$in.')
;';
  $perma_hash = query2array($query, 'permalink');

  if ( empty($perma_hash) )
    return null;
  for ($i=count($permalinks)-1; $i>=0; $i--)
  {
    if ( isset( $perma_hash[ $permalinks[$i] ] ) )
    {
      $idx = $i;
      $cat_id = $perma_hash[ $permalinks[$i] ]['id'];
      if ($perma_hash[ $permalinks[$i] ]['is_old'])
      {
        $query='
UPDATE '.OLD_PERMALINKS_TABLE.' SET last_hit=NOW(), hit=hit+1
  WHERE permalink=\''.$permalinks[$i].'\' AND cat_id='.$cat_id.'
  LIMIT 1';
        pwg_query($query);
      }
      return $cat_id;
    }
  }
  return null;
}

/**
 * Returns display text for images counter of category
 *
 * @param int $cat_nb_images nb images directly in category
 * @param int $cat_count_images nb images in category (including subcats)
 * @param int $cat_count_categories nb subcats
 * @param bool $short_message if true append " in this album"
 * @param string $separator
 * @return string
 */
function get_display_images_count($cat_nb_images, $cat_count_images, $cat_count_categories, $short_message = true, $separator = '\n')
{
  $display_text = '';

  if ($cat_count_images > 0)
  {
    if ($cat_nb_images > 0 and $cat_nb_images < $cat_count_images)
    {
      $display_text.= get_display_images_count($cat_nb_images, $cat_nb_images, 0, $short_message, $separator).$separator;
      $cat_count_images-= $cat_nb_images;
      $cat_nb_images = 0;
    }

    //at least one image direct or indirect
    $display_text.= l10n_dec('%d photo', '%d photos', $cat_count_images);

    if ($cat_count_categories == 0 or $cat_nb_images == $cat_count_images)
    {
      //no descendant categories or descendants do not contain images
      if (!$short_message)
      {
        $display_text.= ' '.l10n('in this album');
      }
    }
    else
    {
      $display_text.= ' '.l10n_dec('in %d sub-album', 'in %d sub-albums', $cat_count_categories);
    }
  }

  return $display_text;
}

/**
 * Find a random photo among all photos inside an album (including sub-albums)
 *
 * @param array $category (at least id,uppercats,count_images)
 * @param bool $recursive
 * @return int|null
 */
function get_random_image_in_category($category, $recursive=true)
{
  $image_id = null;
  if ($category['count_images']>0)
  {
    $query = '
SELECT image_id
  FROM '.CATEGORIES_TABLE.' AS c
    INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.category_id = c.id
  WHERE ';
    if ($recursive)
    {
      $query.= '
    (c.id='.$category['id'].' OR uppercats LIKE \''.$category['uppercats'].',%\')';
    }
    else
    {
      $query.= '
    c.id='.$category['id'];
    }
    $query.= '
    '.get_sql_condition_FandF
    (
      array
        (
          'forbidden_categories' => 'c.id',
          'visible_categories' => 'c.id',
          'visible_images' => 'image_id',
        ),
      "\n  AND"
    ).'
  ORDER BY '.DB_RANDOM_FUNCTION.'()
  LIMIT 1
;';
    $result = pwg_query($query);
    if (pwg_db_num_rows($result) > 0)
    {
      list($image_id) = pwg_db_fetch_row($result);
    }
  }

  return $image_id;
}

/**
 * Get computed array of categories, that means cache data of all categories
 * available for the current user (count_categories, count_images, etc.).
 *
 * @param array &$userdata
 * @param int $filter_days number of recent days to filter on or null
 * @return array
 */
function get_computed_categories(&$userdata, $filter_days=null)
{
  $query = 'SELECT c.id AS cat_id, id_uppercat';
  // Count by date_available to avoid count null
  $query .= ',
  MAX(date_available) AS date_last, COUNT(date_available) AS nb_images
FROM '.CATEGORIES_TABLE.' as c
  LEFT JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.category_id = c.id
  LEFT JOIN '.IMAGES_TABLE.' AS i
    ON ic.image_id = i.id
      AND i.level<='.$userdata['level'];

  if ( isset($filter_days) )
  {
    $query .= ' AND i.date_available > '.pwg_db_get_recent_period_expression($filter_days);
  }

  if ( !empty($userdata['forbidden_categories']) )
  {
    $query.= '
  WHERE c.id NOT IN ('.$userdata['forbidden_categories'].')';
  }

  $query.= '
  GROUP BY c.id';

  $result = pwg_query($query);

  $userdata['last_photo_date'] = null;
  $cats = array();
  while ($row = pwg_db_fetch_assoc($result))
  {
    $row['user_id'] = $userdata['id'];
    $row['nb_categories'] = 0;
    $row['count_categories'] = 0;
    $row['count_images'] = (int)$row['nb_images'];
    $row['max_date_last'] = $row['date_last'];
    if ($row['date_last'] > $userdata['last_photo_date'])
    {
      $userdata['last_photo_date'] = $row['date_last'];
    }

    $cats[$row['cat_id']] = $row;
  }

  foreach ($cats as $cat)
  {
    if ( !isset( $cat['id_uppercat'] ) )
      continue;

    $parent = & $cats[ $cat['id_uppercat'] ];
    $parent['nb_categories']++;

    do
    {
      $parent['count_images'] += $cat['nb_images'];
      $parent['count_categories']++;

      if ((empty($parent['max_date_last'])) or ($parent['max_date_last'] < $cat['date_last']))
      {
        $parent['max_date_last'] = $cat['date_last'];
      }

      if ( !isset( $parent['id_uppercat'] ) )
        break;
      $parent = & $cats[$parent['id_uppercat']];
    }
    while (true);
    unset($parent);
  }

  if ( isset($filter_days) )
  {
    foreach ($cats as $category)
    {
      if (empty($category['max_date_last']))
      {
        remove_computed_category($cats, $category);
      }
    }
  }
  return $cats;
}

/**
 * Removes a category from computed array of categories and updates counters.
 *
 * @param array &$cats
 * @param array $cat category to remove
 */
function remove_computed_category(&$cats, $cat)
{
  if ( isset($cats[$cat['id_uppercat']]) )
  {
    $parent = &$cats[ $cat['id_uppercat'] ];
    $parent['nb_categories']--;

    do
    {
      $parent['count_images'] -= $cat['nb_images'];
      $parent['count_categories'] -= 1+$cat['count_categories'];

      if ( !isset($cats[$parent['id_uppercat']]) )
      {
        break;
      }
      $parent = &$cats[$parent['id_uppercat']];
    }
    while (true);
  }

  unset($cats[$cat['cat_id']]);
}

?>