book.module 31 KB
Newer Older
Dries's avatar
 
Dries committed
1
<?php
2
// $Id$
Dries's avatar
 
Dries committed
3

4
5
6
/**
 * Implementation of hook_node_name().
 */
Dries's avatar
   
Dries committed
7
function book_node_name($node) {
8
  return t('book page');
Dries's avatar
   
Dries committed
9
10
}

11
12
13
/**
 * Implementation of hook_perm().
 */
Dries's avatar
   
Dries committed
14
function book_perm() {
15
  return array('maintain books');
Dries's avatar
   
Dries committed
16
17
}

18
19
20
/**
 * Implementation of hook_access().
 */
Dries's avatar
   
Dries committed
21
function book_access($op, $node) {
Dries's avatar
   
Dries committed
22
  global $user;
Dries's avatar
   
Dries committed
23

24
  if ($op == 'view') {
Dries's avatar
   
Dries committed
25
26
27
28
    // Everyone can access all published book pages whether these pages
    // are still waiting for approval or not.  We might not always want
    // to display pages that are waiting for approval, but we take care
    // of that problem in the book_content() function.
Dries's avatar
   
Dries committed
29
    return $node->status;
Dries's avatar
   
Dries committed
30
31
  }

32
  if ($op == 'create') {
Dries's avatar
   
Dries committed
33
34
    // Only registered users can create book pages.  Given the nature
    // of the book module this is considered to be a good/safe idea.
35
    return user_access('maintain books');
Dries's avatar
   
Dries committed
36
37
  }

38
  if ($op == 'update') {
Dries's avatar
   
Dries committed
39
40
41
    // Only registered users can update book pages.  Given the nature
    // of the book module this is considered to be a good/safe idea.
    // One can only update a book page if there are no suggested updates
42
43
44
45
46
    // of that page waiting for approval and as long as the "create new
    // revision"-bit is set.  That is, only updates that don't overwrite
    // the current or pending information are allowed.

    return user_access('maintain books') && !$node->moderate && $node->revision;
Dries's avatar
   
Dries committed
47
  }
Dries's avatar
   
Dries committed
48
49
}

Dries's avatar
   
Dries committed
50
51
52
/**
 * Implementation of hook_link().
 */
Dries's avatar
   
Dries committed
53
function book_link($type, $node = 0, $main = 0) {
Dries's avatar
   
Dries committed
54
55
56

  $links = array();

Dries's avatar
   
Dries committed
57
58
  if ($type == 'page' && user_access('access content')) {
    $links[] = l(t('books'), 'book', array('title' => t('Read and contribute to the collaborative books.')));
Dries's avatar
   
Dries committed
59
60
  }

Dries's avatar
   
Dries committed
61
  if ($type == 'node' && $node->type == 'book') {
Dries's avatar
   
Dries committed
62
    if (!$main) {
Dries's avatar
   
Dries committed
63
      $links[] = l(t('printer-friendly version'), 'book/print/'. $node->nid, array('title' => t('Show a printer-friendly version of this book page and its sub-pages.')));
Dries's avatar
   
Dries committed
64
    }
Dries's avatar
   
Dries committed
65
66
  }

Dries's avatar
   
Dries committed
67
  return $links;
Dries's avatar
   
Dries committed
68
69
}

Dries's avatar
   
Dries committed
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
/**
 * Implementation of hook_menu().
 */
function book_menu() {
  $items = array();

  $items[] = array('path' => 'node/add/book', 'title' => t('book page'),
    'access' => user_access('maintain books'));
  $items[] = array('path' => 'admin/node/book', 'title' => t('books'),
    'callback' => 'book_admin',
    'access' => user_access('administer nodes'),
    'weight' => 4);
  $items[] = array('path' => 'admin/node/book/orphan', 'title' => t('orphan pages'),
    'callback' => 'book_admin_orphan',
    'access' => user_access('administer nodes'),
    'weight' => 8);
  $result = db_query('SELECT n.nid, n.title FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = 0 ORDER BY b.weight, n.title');
  while ($book = db_fetch_object($result)) {
    $items[] = array('path' => 'admin/node/book/'. $book->nid, 'title' => t('"%title" book', array('%title' => $book->title)));
  }
  $items[] = array('path' => 'book', 'title' => t('books'),
    'callback' => 'book_render',
    'access' => user_access('access content'),
    'type' => MENU_SUGGESTED_ITEM);
  $items[] = array('path' => 'book/print', 'title' => t('printer-friendly version'),
    'callback' => 'book_print',
    'access' => user_access('access content'),
    'type' => MENU_CALLBACK);

  return $items;
}

102
103
104
/**
 * Implementation of hook_block().
 *
Dries's avatar
   
Dries committed
105
106
 * Displays the book table of contents in a block when the current page is a
 * single-node view of a book node.
107
 */
Dries's avatar
   
Dries committed
108
function book_block($op = 'list', $delta = 0) {
Dries's avatar
   
Dries committed
109
  $block = array();
Dries's avatar
   
Dries committed
110
111
112
113
  if ($op == 'list') {
    $block[0]['info'] = t('Book navigation');
  }
  else {
Dries's avatar
   
Dries committed
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
    // Only display this block when the user is browsing a book:
    if (arg(0) == 'node' && is_numeric(arg(1))) {
      $result = db_query('SELECT n.nid, n.title, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.nid = %d', arg(1));
      if (db_num_rows($result) > 0) {
        $node = db_fetch_object($result);

        $path = book_location($node);
        $path[] = $node;

        $expand = array();
        foreach ($path as $key => $node) {
          $expand[] = $node->nid;
        }

        $block['subject'] = $path[0]->title;
        $block['content'] = book_tree($expand[0], 5, $expand);
      }
    }
Dries's avatar
   
Dries committed
132
133
134
135
136
  }

   return $block;
}

137
138
139
/**
 * Implementation of hook_load().
 */
Dries's avatar
   
Dries committed
140
function book_load($node) {
Dries's avatar
   
Dries committed
141
  global $user;
Dries's avatar
   
Dries committed
142

143
  $book = db_fetch_object(db_query('SELECT parent, weight, log FROM {book} WHERE nid = %d', $node->nid));
Dries's avatar
   
Dries committed
144

145
  if (arg(1) == 'edit' && !user_access('administer nodes')) {
Dries's avatar
   
Dries committed
146
147
    // If a user is about to update a book page, we overload some
    // fields to reflect the changes.
Dries's avatar
   
Dries committed
148
149
150
151
152
153
    if ($user->uid) {
      $book->uid = $user->uid;
      $book->name = $user->name;
    }
    else {
      $book->uid = 0;
154
      $book->name = '';
Dries's avatar
   
Dries committed
155
    }
Dries's avatar
   
Dries committed
156
  }
Dries's avatar
   
Dries committed
157

Dries's avatar
   
Dries committed
158
159
160
  // We set the revision field to indicate that we have to create
  // a new revision when updating this book page.  We enable this
  // always such that the "edit this page" links appear.
Dries's avatar
   
Dries committed
161
  $book->revision = 1;
Dries's avatar
   
Dries committed
162

Dries's avatar
   
Dries committed
163
  return $book;
Dries's avatar
   
Dries committed
164
165
}

166
167
168
/**
 * Implementation of hook_insert().
 */
Dries's avatar
   
Dries committed
169
function book_insert($node) {
170
  db_query("INSERT INTO {book} (nid, parent, weight, log) VALUES (%d, %d, %d, '%s')", $node->nid, $node->parent, $node->weight, $node->log);
Dries's avatar
   
Dries committed
171
}
Dries's avatar
   
Dries committed
172

173
174
175
/**
 * Implementation of hook_update().
 */
Dries's avatar
   
Dries committed
176
function book_update($node) {
177
  db_query("UPDATE {book} SET parent = %d, weight = %d, log = '%s' WHERE nid = %d", $node->parent, $node->weight, $node->log, $node->nid);
Dries's avatar
   
Dries committed
178
}
Dries's avatar
   
Dries committed
179

180
181
182
/**
 * Implementation of hook_delete().
 */
183
function book_delete(&$node) {
184
  db_query('DELETE FROM {book} WHERE nid = %d', $node->nid);
Dries's avatar
   
Dries committed
185
186
}

187
188
189
/**
 * Implementation of hook_validate().
 */
190
function book_validate(&$node) {
191
192
  // Set default values for non-administrators.
  if (!user_access('administer nodes')) {
193
194
195
    $node->weight = 0;
    $node->revision = 1;
  }
Dries's avatar
   
Dries committed
196
197
}

198
199
200
/**
 * Implementation of hook_form().
 */
Dries's avatar
   
Dries committed
201
function book_form(&$node) {
Dries's avatar
   
Dries committed
202
  global $user;
Dries's avatar
   
Dries committed
203

204
  $op = $_POST['op'];
205
  $output = form_select(t('Parent'), 'parent', $node->parent, book_toc($node->nid), t('The parent subject or category the page belongs in.'));
Dries's avatar
   
Dries committed
206

207
208
  if (function_exists('taxonomy_node_form')) {
    $output .= implode('', taxonomy_node_form('book', $node));
209
210
  }

211
  $output .= form_textarea(t('Body'), 'body', $node->body, 60, 20, '', NULL, TRUE);
212
  $output .= form_textarea(t('Log message'), 'log', $node->log, 60, 5, t('An explanation of the additions or updates being made to help the group understand your motivations.'));
Dries's avatar
   
Dries committed
213

214
215
  if (user_access('administer nodes')) {
    $output .= form_weight(t('Weight'), 'weight', $node->weight, 15, t('The heavier pages will sink and the lighter pages will be positioned nearer the top.'));
Dries's avatar
   
Dries committed
216
217
  }
  else {
Dries's avatar
   
Dries committed
218
219
    // If a regular user updates a book page, we create a new revision
    // authored by that user:
220
    $output .= form_hidden('revision', 1);
Dries's avatar
   
Dries committed
221
222
223
224
225
  }

  return $output;
}

226
227
228
/**
 * Implementation of hook_node_link().
 */
Dries's avatar
   
Dries committed
229
function book_node_link($node = 0) {
Dries's avatar
   
Dries committed
230
231
  global $user;

232
233
  $op = $_POST['op'];
  $edit = $_POST['edit'];
Dries's avatar
   
Dries committed
234

235
  if ($node->type != 'book') {
Dries's avatar
   
Dries committed
236

237
238
    if ($edit['nid']) {
      $node = node_load(array('nid' => $edit['nid']));
Dries's avatar
   
Dries committed
239
240
    }

241
242
    if ($op == t('Add to book outline')) {
      db_query('INSERT INTO {book} (nid, parent, weight) VALUES (%d, %d, %d)', $node->nid, $edit['parent'], $edit['weight']);
Dries's avatar
   
Dries committed
243
      drupal_set_message(t('Added the node to the book.'));
Dries's avatar
   
Dries committed
244
245
    }

246
247
    if ($op == t('Update book outline')) {
      db_query('UPDATE {book} SET parent = %d, weight = %d WHERE nid = %d', $edit['parent'], $edit['weight'], $node->nid);
Dries's avatar
   
Dries committed
248
      drupal_set_message(t('Updated the book outline.'));
Dries's avatar
   
Dries committed
249
250
    }

251
252
    if ($op == t('Remove from book outline')) {
      db_query('DELETE FROM {book} WHERE nid = %d', $node->nid);
Dries's avatar
   
Dries committed
253
      drupal_set_message(t('Removed the node form the book.'));
Dries's avatar
   
Dries committed
254
255
    }

Dries's avatar
   
Dries committed
256
    $output .= '<h3>'. t('Edit book outline for node "%booktitle"', array('%booktitle' => '<em>'. $node->title .'</em>')) .'</h3>';
Dries's avatar
   
Dries committed
257

258
259
    if ($edit['nid']) {
      $page = db_fetch_object(db_query('SELECT * FROM {book} WHERE nid = %d', $node->nid));
Dries's avatar
   
Dries committed
260

261
      $output .= form_select(t('Parent'), 'parent', $page->parent, book_toc($node->nid), t('The parent subject or category the page belongs in.'));
262
      $output .= form_weight(t('Weight'), 'weight', $node->weight, 15, t('The heavier pages will sink and the lighter pages will be positioned nearer the top.'));
Dries's avatar
   
Dries committed
263
264

      if ($page->nid) {
265
266
        $output .= form_submit(t('Update book outline'));
        $output .= form_submit(t('Remove from book outline'));
Dries's avatar
   
Dries committed
267
268
      }
      else {
269
        $output .= form_submit(t('Add to book outline'));
Dries's avatar
   
Dries committed
270
271
272
273
      }

    }
    else {
274
      $output .= form_submit(t('Edit book outline'));
Dries's avatar
   
Dries committed
275
276
    }

277
    $output .= form_hidden('nid', $node->nid);
Dries's avatar
   
Dries committed
278

279
    return form($output, 'post', url('admin/node/book'));
Dries's avatar
   
Dries committed
280
281
282
  }
}

283
284
285
/**
 * Return the the most recent revision that matches the specified conditions.
 */
Dries's avatar
   
Dries committed
286
287
288
289
290
291
function book_revision_load($page, $conditions = array()) {

  $revisions = array_reverse(node_revision_list($page));

  foreach ($revisions as $revision) {

Dries's avatar
   
Dries committed
292
    // Extract the specified revision:
Dries's avatar
   
Dries committed
293
294
    $node = node_revision_load($page, $revision);

Dries's avatar
   
Dries committed
295
296
    // Check to see if the conditions are met:
    $status = TRUE;
Dries's avatar
   
Dries committed
297
298
299

    foreach ($conditions as $key => $value) {
      if ($node->$key != $value) {
Dries's avatar
   
Dries committed
300
        $status = FALSE;
Dries's avatar
   
Dries committed
301
302
303
304
305
306
307
308
309
      }
    }

    if ($status) {
      return $node;
    }
  }
}

310
311
312
/**
 * Return the path (call stack) to a certain book page.
 */
Dries's avatar
   
Dries committed
313
function book_location($node, $nodes = array()) {
314
  $parent = db_fetch_object(db_query('SELECT n.nid, n.title, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.nid = %d', $node->parent));
Dries's avatar
   
Dries committed
315
316
317
318
319
320
321
  if ($parent->title) {
    $nodes = book_location($parent, $nodes);
    array_push($nodes, $parent);
  }
  return $nodes;
}

Dries's avatar
   
Dries committed
322
function book_location_down($node, $nodes = array()) {
323
  $last_direct_child = db_fetch_object(db_query('SELECT n.nid, n.title, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = %d ORDER BY b.weight DESC, n.title DESC', $node->nid));
Dries's avatar
   
Dries committed
324
325
326
327
328
329
330
  if ($last_direct_child) {
    array_push($nodes, $last_direct_child);
    $nodes = book_location_down($last_direct_child, $nodes);
  }
  return $nodes;
}

331
332
333
/**
 * Fetch the node object of the previous page of the book.
 */
Dries's avatar
   
Dries committed
334
function book_prev($node) {
Dries's avatar
   
Dries committed
335
  // If the parent is zero, we are at the start of a book so there is no previous.
Dries's avatar
   
Dries committed
336
337
338
339
  if ($node->parent == 0) {
    return NULL;
  }

Dries's avatar
   
Dries committed
340
  // Previous on the same level:
Dries's avatar
   
Dries committed
341
  $direct_above = db_fetch_object(db_query("SELECT n.nid, n.title FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = %d AND n.status = 1 AND (n.moderate = 0 OR n.revisions != '') AND (b.weight < %d OR (b.weight = %d AND n.title < '%s')) ORDER BY b.weight DESC, n.title DESC", $node->parent, $node->weight, $node->weight, $node->title));
Dries's avatar
   
Dries committed
342
  if ($direct_above) {
Dries's avatar
   
Dries committed
343
    // Get last leaf of $above.
Dries's avatar
   
Dries committed
344
    $path = book_location_down($direct_above);
Dries's avatar
   
Dries committed
345
346

    return $path ? (count($path) > 0 ? array_pop($path) : NULL) : $direct_above;
Dries's avatar
   
Dries committed
347
348
  }
  else {
Dries's avatar
   
Dries committed
349
    // Direct parent:
Dries's avatar
   
Dries committed
350
    $prev = db_fetch_object(db_query("SELECT n.nid, n.title FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.nid = %d AND n.status = 1 AND (n.moderate = 0 OR n.revisions != '')", $node->parent));
Dries's avatar
   
Dries committed
351
352
353
354
    return $prev;
  }
}

355
356
357
/**
 * Fetch the node object of the next page of the book.
 */
Dries's avatar
   
Dries committed
358
359
function book_next($node) {
  // get first direct child
Dries's avatar
   
Dries committed
360
  $child = db_fetch_object(db_query("SELECT DISTINCT(n.nid), n.title FROM {node} n ". node_access_join_sql() ." INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = %d AND n.status = 1 AND ". node_access_where_sql() ." AND (n.moderate = 0 OR n.revisions != '') ORDER BY b.weight ASC, n.title ASC", $node->nid));
Dries's avatar
   
Dries committed
361
362
363
364
  if ($child) {
    return $child;
  }

Dries's avatar
   
Dries committed
365
366
  // No direct child: get next for this level or any parent in this book.
  array_push($path = book_location($node), $node); // Path to top-level node including this one.
367

Dries's avatar
   
Dries committed
368
  while (($leaf = array_pop($path)) && count($path)) {
Dries's avatar
   
Dries committed
369
    $next = db_fetch_object(db_query("SELECT DISTINCT(n.nid), n.title FROM {node} n ". node_access_join_sql() ." INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = %d AND n.status = 1 AND ". node_access_where_sql() ." AND (n.moderate = 0 OR n.revisions != '') AND (b.weight > %d OR (b.weight = %d AND n.title > '%s')) ORDER BY b.weight ASC, n.title ASC", $leaf->parent, $leaf->weight, $leaf->weight, $leaf->title));
Dries's avatar
   
Dries committed
370
371
372
373
374
375
    if ($next) {
      return $next;
    }
  }
}

376
377
378
/**
 * Implementation of hook_content().
 */
Dries's avatar
   
Dries committed
379
function book_content($node, $teaser = FALSE) {
380
  $op = $_POST['op'];
Dries's avatar
   
Dries committed
381

Dries's avatar
   
Dries committed
382
383
384
  // Always display the most recently approved revision of a node
  // (if any) unless we have to display this page in the context of
  // the moderation queue.
385
386
  if ($op != t('Preview') && $node->moderate && arg(0) != 'queue') {
    $revision = book_revision_load($node, array('moderate' => 0, 'status' => 1));
Dries's avatar
   
Dries committed
387
388
389
390

    if ($revision) {
      $node = $revision;
    }
Dries's avatar
   
Dries committed
391
392
  }

393
394
  // Extract the page body.
  $node = node_prepare($node, $teaser);
Dries's avatar
   
Dries committed
395

Dries's avatar
   
Dries committed
396
397
398
  return $node;
}

399
400
401
402
403
404
/**
 * Implementation of hook_view().
 *
 * If not displayed on the main page, we render the node as a page in the
 * book with extra links to the previous and next pages.
 */
Dries's avatar
   
Dries committed
405
function book_view(&$node, $teaser = FALSE, $page = FALSE) {
Dries's avatar
   
Dries committed
406
  $node = book_content($node, $teaser);
Dries's avatar
 
Dries committed
407

Dries's avatar
   
Dries committed
408
409
  if (!$teaser && $node->moderate) {
    $node->body .= '<div class="log"><div class="title">'. t('Log') .':</div>'. $node->log .'</div>';
Dries's avatar
   
Dries committed
410
411
412
  }
}

413
/**
Dries's avatar
   
Dries committed
414
415
416
 * Implementation of hook_nodeapi().
 *
 * Appends book navigation to all nodes in the book.
417
 */
Dries's avatar
   
Dries committed
418
419
420
421
function book_nodeapi(&$node, $op, $teaser, $page) {
  switch ($op) {
    case 'view':
      if (!$teaser) {
Dries's avatar
   
Dries committed
422
        $book = db_fetch_array(db_query('SELECT * FROM {book} WHERE nid = %d', $node->nid));
Dries's avatar
   
Dries committed
423

Dries's avatar
   
Dries committed
424
425
426
427
428
        if ($book) {
          foreach ($book as $key => $value) {
            $node->$key = $value;
          }
          $node = book_navigation($node);
429
430
431
          if ($page) {
            menu_set_location($node->breadcrumb);
          }
Dries's avatar
   
Dries committed
432
        }
Dries's avatar
   
Dries committed
433
      }
Dries's avatar
   
Dries committed
434
      break;
Dries's avatar
   
Dries committed
435
  }
Dries's avatar
   
Dries committed
436
}
Dries's avatar
   
Dries committed
437

438
439
440
441
/**
 * Prepares both the custom breadcrumb trail and the forward/backward
 * navigation for a node presented as a book page.
 */
Dries's avatar
   
Dries committed
442
function book_navigation($node) {
Dries's avatar
   
Dries committed
443
  $path = book_location($node);
Dries's avatar
   
Dries committed
444

Dries's avatar
   
Dries committed
445
  // Construct the breadcrumb:
Dries's avatar
   
Dries committed
446

Dries's avatar
   
Dries committed
447
  $node->breadcrumb = array(); // Overwrite the trail with a book trail.
Dries's avatar
   
Dries committed
448
  foreach ($path as $level) {
Dries's avatar
   
Dries committed
449
    $node->breadcrumb[] = array('path' => 'node/'. $level->nid, 'title' =>  $level->title);
Dries's avatar
   
Dries committed
450
  }
Dries's avatar
   
Dries committed
451
  $node->breadcrumb[] = array('path' => 'node/'. $node->nid);
Dries's avatar
   
Dries committed
452

Dries's avatar
   
Dries committed
453
  if ($node->nid) {
454
    $output .= '<div class="book">';
Dries's avatar
   
Dries committed
455
456

    if ($tree = book_tree($node->nid)) {
Dries's avatar
   
Dries committed
457
      $output .= '<div class="tree">'. $tree .'</div>';
Dries's avatar
   
Dries committed
458
    }
Dries's avatar
   
Dries committed
459

Dries's avatar
   
Dries committed
460
    if ($prev = book_prev($node)) {
461
      $links .= '<div class="prev">';
Dries's avatar
   
Dries committed
462
      $links .= l(t('previous'), 'node/'. $prev->nid, array('title' => t('View the previous page.')));
463
      $links .= '</div>';
Dries's avatar
   
Dries committed
464
      $titles .= '<div class="prev">'. $prev->title .'</div>';
Dries's avatar
   
Dries committed
465
466
    }
    else {
Dries's avatar
   
Dries committed
467
      $links .= '<div class="prev">&nbsp;</div>'; // Make an empty div to fill the space.
Dries's avatar
   
Dries committed
468
469
    }
    if ($next = book_next($node)) {
470
      $links .= '<div class="next">';
Dries's avatar
   
Dries committed
471
      $links .= l(t('next'), 'node/'. $next->nid, array('title' => t('View the next page.')));
472
      $links .= '</div>';
Dries's avatar
   
Dries committed
473
      $titles .= '<div class="next">'. $next->title .'</div>';
Dries's avatar
   
Dries committed
474
475
    }
    else {
Dries's avatar
   
Dries committed
476
      $links .= '<div class="next">&nbsp;</div>'; // Make an empty div to fill the space.
Dries's avatar
   
Dries committed
477
478
    }
    if ($node->parent) {
479
      $links .= '<div class="up">';
Dries's avatar
   
Dries committed
480
      $links .= l(t('up'), 'node/'. $node->parent, array('title' => t('View this page\'s parent section.')));
481
      $links .= '</div>';
Dries's avatar
   
Dries committed
482
    }
Dries's avatar
   
Dries committed
483

484
    $output .= '<div class="nav">';
Dries's avatar
   
Dries committed
485
486
    $output .= ' <div class="links">'. $links .'</div>';
    $output .= ' <div class="titles">'. $titles .'</div>';
487
488
    $output .= '</div>';
    $output .= '</div>';
Dries's avatar
   
Dries committed
489
  }
Dries's avatar
   
Dries committed
490

Dries's avatar
   
Dries committed
491
  $node->body = $node->body.$output;
Dries's avatar
   
Dries committed
492

Dries's avatar
   
Dries committed
493
  return $node;
Dries's avatar
   
Dries committed
494
}
Dries's avatar
 
Dries committed
495

496
function book_toc_recurse($nid, $indent, $toc, $children, $exclude) {
Dries's avatar
   
Dries committed
497
498
  if ($children[$nid]) {
    foreach ($children[$nid] as $foo => $node) {
499
500
501
502
      if (!$exclude || $exclude != $node->nid) {
        $toc[$node->nid] = $indent .' '. $node->title;
        $toc = book_toc_recurse($node->nid, $indent .'--', $toc, $children, $exclude);
      }
Dries's avatar
   
Dries committed
503
504
505
506
507
508
    }
  }

  return $toc;
}

509
function book_toc($exclude = 0) {
Dries's avatar
   
Dries committed
510
  $result = db_query('SELECT DISTINCT(n.nid), n.title, b.parent FROM {node} n '. node_access_join_sql() .' INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND '. node_access_where_sql() .' ORDER BY b.weight, n.title');
Dries's avatar
   
Dries committed
511

Dries's avatar
   
Dries committed
512
  while ($node = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
513
514
515
516
    if (!$children[$node->parent]) {
      $children[$node->parent] = array();
    }
    array_push($children[$node->parent], $node);
Dries's avatar
   
Dries committed
517
  }
Dries's avatar
   
Dries committed
518

Dries's avatar
   
Dries committed
519
520
  // If the user is an administrator, add the top-level book page;
  // only administrators can start new books.
521
522
  if (user_access('administer nodes')) {
    $toc[0] = '<'. t('top-level') .'>';
Dries's avatar
   
Dries committed
523
524
  }

525
  $toc = book_toc_recurse(0, '', array(), $children, $exclude);
Dries's avatar
   
Dries committed
526

Dries's avatar
   
Dries committed
527
528
529
  return $toc;
}

Dries's avatar
   
Dries committed
530
function book_tree_recurse($nid, $depth, $children, $unfold = array()) {
Dries's avatar
   
Dries committed
531
  if ($depth > 0) {
Dries's avatar
   
Dries committed
532
533
    if ($children[$nid]) {
      foreach ($children[$nid] as $foo => $node) {
Dries's avatar
   
Dries committed
534
535
536
        if (in_array($node->nid, $unfold)) {
          if ($tree = book_tree_recurse($node->nid, $depth - 1, $children, $unfold)) {
            $output .= '<li class="expanded">';
Dries's avatar
   
Dries committed
537
538
            $output .= l($node->title, 'node/'. $node->nid);
            $output .= '<ul>'. $tree .'</ul>';
Dries's avatar
   
Dries committed
539
540
541
            $output .= '</li>';
          }
          else {
Dries's avatar
   
Dries committed
542
            $output .= '<li class="leaf">'. l($node->title, 'node/'. $node->nid) .'</li>';
Dries's avatar
   
Dries committed
543
544
545
546
          }
        }
        else {
          if ($tree = book_tree_recurse($node->nid, 1, $children)) {
Dries's avatar
   
Dries committed
547
            $output .= '<li class="collapsed">'. l($node->title, 'node/'. $node->nid) .'</li>';
Dries's avatar
   
Dries committed
548
549
          }
          else {
Dries's avatar
   
Dries committed
550
            $output .= '<li class="leaf">'. l($node->title, 'node/'. $node->nid) .'</li>';
Dries's avatar
   
Dries committed
551
          }
Dries's avatar
   
Dries committed
552
        }
Dries's avatar
   
Dries committed
553
554
      }
    }
Dries's avatar
   
Dries committed
555
556
557
558
559
  }

  return $output;
}

Dries's avatar
   
Dries committed
560
function book_tree($parent = 0, $depth = 3, $unfold = array()) {
Dries's avatar
   
Dries committed
561
  $result = db_query('SELECT DISTINCT(n.nid), n.title, b.parent FROM {node} n '. node_access_join_sql() .' INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND '. node_access_where_sql() .' AND n.moderate = 0 ORDER BY b.weight, n.title');
Dries's avatar
   
Dries committed
562

Dries's avatar
   
Dries committed
563
564
565
566
  while ($node = db_fetch_object($result)) {
    $list = $children[$node->parent] ? $children[$node->parent] : array();
    array_push($list, $node);
    $children[$node->parent] = $list;
Dries's avatar
   
Dries committed
567
  }
Dries's avatar
   
Dries committed
568

Dries's avatar
   
Dries committed
569
  if ($tree = book_tree_recurse($parent, $depth, $children, $unfold)) {
Dries's avatar
   
Dries committed
570
    return '<ul>'. $tree .'</ul>';
Dries's avatar
   
Dries committed
571
  }
Dries's avatar
   
Dries committed
572
573
}

574
/**
Dries's avatar
Dries committed
575
 * Menu callback; prints a listing of all books.
576
 */
Dries's avatar
   
Dries committed
577
function book_render() {
578
  $result = db_query('SELECT n.nid FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = 0 AND n.status = 1 AND (n.moderate = 0 OR n.revisions IS NOT NULL) ORDER BY b.weight, n.title');
Dries's avatar
   
Dries committed
579

Dries's avatar
   
Dries committed
580
  while ($page = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
581
    // Load the node:
582
    $node = node_load(array('nid' => $page->nid));
Dries's avatar
   
Dries committed
583

Dries's avatar
   
Dries committed
584
    if ($node) {
Dries's avatar
   
Dries committed
585
      // Take the most recent approved revision, extract the page and check output:
Dries's avatar
   
Dries committed
586
      $node = book_content($node);
Dries's avatar
   
Dries committed
587
      // Output the content:
588
      $output .= '<div class="book">';
Dries's avatar
   
Dries committed
589
      $output .= '<div class="title">'. l($node->title, 'node/'. $node->nid) .'</div>';
590
      $output .= '<div class="body">'. $node->teaser .'</div>';
591
      $output .= '</div>';
Dries's avatar
   
Dries committed
592
    }
Dries's avatar
   
Dries committed
593
594
  }

595
596
  drupal_set_title(t('Books'));
  print theme('page', $output);
Dries's avatar
   
Dries committed
597
598
}

599
/**
Dries's avatar
   
Dries committed
600
 * Menu callback; generates printer-friendly book page with all descendants.
601
602
 */
function book_print($nid = 0, $depth = 1) {
Dries's avatar
   
Dries committed
603
  global $base_url;
Dries's avatar
   
Dries committed
604
  $result = db_query('SELECT DISTINCT(n.nid) FROM {node} n '. node_access_join_sql() .' INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND '. node_access_where_sql() .' AND n.nid = %d AND (n.moderate = 0 OR n.revisions IS NOT NULL) ORDER BY b.weight, n.title', $nid);
Dries's avatar
   
Dries committed
605

Dries's avatar
   
Dries committed
606
607
  while ($page = db_fetch_object($result)) {
    // load the node:
608
    $node = node_load(array('nid' => $page->nid));
Dries's avatar
   
Dries committed
609

Dries's avatar
   
Dries committed
610
611
    if ($node) {
      // output the content:
612
613
      if (node_hook($node, 'content')) {
        $node = node_invoke($node, 'content');
Dries's avatar
   
Dries committed
614
      }
Dries's avatar
   
Dries committed
615
      $output .= '<h1 id="'. $node->nid .'" name="'. $node->nid .'" class="book-h'. $depth .'">'. $node->title .'</h1>';
Dries's avatar
   
Dries committed
616

Dries's avatar
   
Dries committed
617
      if ($node->body) {
Dries's avatar
   
Dries committed
618
        $output .= $node->body;
Dries's avatar
   
Dries committed
619
      }
Dries's avatar
   
Dries committed
620
    }
Dries's avatar
   
Dries committed
621
  }
Dries's avatar
   
Dries committed
622

623
  $output .= book_print_recurse($nid, $depth);
Dries's avatar
   
Dries committed
624

Dries's avatar
   
Dries committed
625
626
  $html = '<html><head><title>'. $node->title .'</title>';
  $html .= '<base href="'. $base_url .'/" />';
Dries's avatar
   
Dries committed
627
  $html .= "<style type=\"text/css\">\n@import url(misc/print.css);\n</style>";
628
  $html .= '</head><body>'. $output .'</body></html>';
Dries's avatar
   
Dries committed
629

630
  print $html;
Dries's avatar
   
Dries committed
631
632
}

633
function book_print_recurse($parent = '', $depth = 1) {
Dries's avatar
   
Dries committed
634
  $result = db_query("SELECT DISTINCT(n.nid) FROM {node} n ". node_access_join_sql() ." INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND ". node_access_where_sql() ." AND b.parent = '$parent' AND (n.moderate = 0 OR n.revisions IS NOT NULL) ORDER BY b.weight, n.title");
Dries's avatar
   
Dries committed
635

Dries's avatar
   
Dries committed
636
  while ($page = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
637
    // Load the node:
638
    $node = node_load(array('nid' => $page->nid));
Dries's avatar
   
Dries committed
639

Dries's avatar
   
Dries committed
640
    // Take the most recent approved revision:
Dries's avatar
   
Dries committed
641
    if ($node->moderate) {
642
      $node = book_revision_load($node, array('moderate' => 0, 'status' => 1));
Dries's avatar
   
Dries committed
643
644
    }

Dries's avatar
   
Dries committed
645
    if ($node) {
Dries's avatar
   
Dries committed
646
      // Output the content:
647
648
      if (node_hook($node, 'content')) {
        $node = node_invoke($node, 'content');
Dries's avatar
   
Dries committed
649
      }
Dries's avatar
   
Dries committed
650
      $output .= '<h1 id="'. $node->nid .'" name="'. $node->nid .'" class="book-h'. $depth .'">'. $node->title .'</h1>';
Dries's avatar
   
Dries committed
651

Dries's avatar
   
Dries committed
652
      if ($node->body) {
653
        $output .= '<ul>'. $node->body .'</ul>';
Dries's avatar
   
Dries committed
654
      }
Dries's avatar
   
Dries committed
655

656
      $output .= book_print_recurse($node->nid, $depth + 1);
Dries's avatar
   
Dries committed
657
    }
Dries's avatar
   
Dries committed
658
  }
Dries's avatar
   
Dries committed
659

Dries's avatar
   
Dries committed
660
661
  return $output;
}
Dries's avatar
   
Dries committed
662

Dries's avatar
   
Dries committed
663
function book_admin_view_line($node, $depth = 0) {
Dries's avatar
   
Dries committed
664
  return array('<div style="padding-left: '. (25 * $depth) .'px;">'. form_textfield(NULL, $node->nid .'][title', $node->title, 64, 255) .'</div>', form_weight(NULL, $node->nid .'][weight', $node->weight), l(t('view'), 'node/'. $node->nid), l(t('edit'), 'node/'. $node->nid .'/edit'), l(t('delete'), 'admin/node/delete/'. $node->nid));
Dries's avatar
   
Dries committed
665
666
667
}

function book_admin_view_book($nid, $depth = 1) {
Dries's avatar
   
Dries committed
668
  $result = db_query("SELECT n.nid FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = %d ORDER BY b.weight, n.title", $nid);
Dries's avatar
   
Dries committed
669
670

  while ($node = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
671
    $node = node_load(array('nid' => $node->nid));
Dries's avatar
   
Dries committed
672
673
    $rows[] = book_admin_view_line($node, $depth);
    $rows = array_merge($rows, book_admin_view_book($node->nid, $depth + 1));
Dries's avatar
   
Dries committed
674
675
  }

Dries's avatar
   
Dries committed
676
  return $rows;
Dries's avatar
   
Dries committed
677
678
}

679
680
681
/**
 * Display an administrative view of the hierarchy of a book.
 */
Dries's avatar
   
Dries committed
682
function book_admin_view($nid, $depth = 0) {
Dries's avatar
   
Dries committed
683
  if ($nid) {
Dries's avatar
   
Dries committed
684
    $node = node_load(array('nid' => $nid));
Dries's avatar
   
Dries committed
685

Dries's avatar
   
Dries committed
686
    $output .= '<h3>'. $node->title .'</h3>';
Dries's avatar
   
Dries committed
687

Dries's avatar
   
Dries committed
688
    $header = array(t('title'), t('weight'), array('data' => t('operations'), 'colspan' => 3));
Dries's avatar
   
Dries committed
689
690
    $rows[] = book_admin_view_line($node);
    $rows = array_merge($rows, book_admin_view_book($nid));
Dries's avatar
   
Dries committed
691

Dries's avatar
   
Dries committed
692
693
    $output .= theme('table', $header, $rows);
    $output .= form_submit(t('Save book pages'));
Dries's avatar
   
Dries committed
694

Dries's avatar
   
Dries committed
695
696
    return form($output);
  }
Dries's avatar
   
Dries committed
697
698
699
}

function book_admin_save($nid, $edit = array()) {
Dries's avatar
   
Dries committed
700
  if ($nid) {
Dries's avatar
   
Dries committed
701
    $book = node_load(array('nid' => $nid));
Dries's avatar
   
Dries committed
702

Dries's avatar
   
Dries committed
703
    foreach ($edit as $nid => $value) {
Dries's avatar
   
Dries committed
704
705
706
707
      // Check to see whether the title needs updating:
      $title = db_result(db_query('SELECT title FROM {node} WHERE nid = %d', $nid));
      if ($title != $value['title']) {
        db_query("UPDATE {node} SET title = '%s' WHERE nid = %d", $value['title'], $nid);
Dries's avatar
   
Dries committed
708
      }
Dries's avatar
   
Dries committed
709

Dries's avatar
   
Dries committed
710
711
712
713
      // Check to see whether the weight needs updating:
      $weight = db_result(db_query('SELECT weight FROM {book} WHERE nid = %d', $nid));
      if ($weight != $value['weight']) {
        db_query('UPDATE {book} SET weight = %d WHERE nid = %d', $value['weight'], $nid);
Dries's avatar
   
Dries committed
714
      }
Dries's avatar
   
Dries committed
715
716
    }

717
718
    $message = t('updated book "%title"', array('%title' => $book->title));
    watchdog('special', $message);
Dries's avatar
   
Dries committed
719

Dries's avatar
   
Dries committed
720
721
    return $message;
  }
Dries's avatar
   
Dries committed
722
723
}

724
/**
Dries's avatar
Dries committed
725
 * Menu callback; displays a listing of all orphaned book pages.
726
 */
Dries's avatar
   
Dries committed
727
function book_admin_orphan() {
Dries's avatar
   
Dries committed
728
  $result = db_query('SELECT n.nid, n.title, n.status, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid');
Dries's avatar
   
Dries committed
729
730
731
732
733

  while ($page = db_fetch_object($result)) {
    $pages[$page->nid] = $page;
  }

Dries's avatar
   
Dries committed
734
  if ($pages) {
735
    $output .= '<h3>'. t('Orphan pages') .'</h3>';
Dries's avatar
   
Dries committed
736
    $header = array(t('title'), t('weight'), array('data' => t('operations'), 'colspan' => 3));
Dries's avatar
   
Dries committed
737
738
    foreach ($pages as $nid => $node) {
      if ($node->parent && empty($pages[$node->parent])) {
Dries's avatar
   
Dries committed
739
740
        $rows[] = book_admin_view_line($node, $depth);
        $rows = array_merge($rows, book_admin_view_book($node->nid, $depth + 1));
Dries's avatar
   
Dries committed
741
      }
Dries's avatar
   
Dries committed
742
    }
Dries's avatar
   
Dries committed
743
    $output .= theme('table', $header, $rows);
Dries's avatar
   
Dries committed
744
745
  }

Dries's avatar
   
Dries committed
746
  print theme('page', $output);
Dries's avatar
   
Dries committed
747
748
}

749
/**
Dries's avatar
Dries committed
750
 * Menu callback; displays the book administration page.
751
 */
Dries's avatar
Dries committed
752
function book_admin($nid = 0) {
Dries's avatar
   
Dries committed
753
754
  $op = $_POST['op'];
  $edit = $_POST['edit'];
Dries's avatar
   
Dries committed
755

Dries's avatar
   
Dries committed
756
  switch ($op) {
Dries's avatar
   
Dries committed
757
758
759
760
    case t('Edit book outline'):
    case t('Add to book outline'):
    case t('Remove from book outline'):
    case t('Update book outline'):
Dries's avatar
   
Dries committed
761
762
      $output = book_node_link();
      break;
Dries's avatar
   
Dries committed
763
    case t('Save book pages'):
764
      drupal_set_message(book_admin_save($nid, $edit));
Dries's avatar
   
Dries committed
765
766
      // fall through:
    default:
767
      $output .= book_admin_view($nid);
Dries's avatar
   
Dries committed
768
      break;
Dries's avatar
   
Dries committed
769
  }
Dries's avatar
   
Dries committed
770
  print theme('page', $output);
Dries's avatar
   
Dries committed
771
772
}

773
774
775
/**
 * Implementation of hook_help().
 */
Dries's avatar
   
Dries committed
776
function book_help($section) {
Dries's avatar
   
Dries committed
777
  switch ($section) {
Dries's avatar
   
Dries committed
778
    case 'admin/help#book':
Dries's avatar
   
Dries committed
779
      return t("
Dries's avatar
   
Dries committed
780
      <p>The book organises content into a nested hierarchical structure. It is particularly good for manuals, Frequently Asked Questions (FAQs) and the like, allowing you to have chapters, sections, etc.</p>
781
      <p>A book is simply a collection of nodes that have been linked together. These nodes are usually of type <em>book page</em>, but you can insert nodes of any type into a book outline. Every node in the book has a <em>parent</em> node which  \"contains\" it. This is how book.module establishes its hierarchy. At any given level in the hierarchy, a book can contain many nodes. All these sibling nodes are sorted according to the <em>weight</em> that you give them.</p>
782
      <p>A book page is a special node type that allows you to embed PHP within the body of the page. This capability is only offered to administrators, since malicious users could abuse this power. In addition, book pages contain a <em>log message</em> field which helps your users understand the motivation behind an edit of a book page. Each edited version of a book page is stored as a new revision of a node. This capability makes it easy to revert to an old version of a page, should that be desirable.</p>
783
      <p>Like other node types, book submissions and edits may be subject to moderation, depending on your configuration.  Similarly, books use <a href=\"%permissions\">permissions</a> to determine who may read and write to them. Only administrators are allowed to create new books, which are really just nodes whose parent is <em>&lt;top-level&gt;</em>. To include an existing node in your book, click on the \"administer\"-link in that node.  At the bottom of this administration page, click on the <em>edit book outline</em> button. This enables you to place the node wherever you'd like within the book hierarchy. To add a new node into your book, use the <a href=\"%create\">create content &raquo; book page</a> link.</p>
784
      <p>Administrators may review the hierarchy of their books by clicking on the <a href=\"%collaborative-book\">collaborative book</a> link in the adminstration pages. There, nodes may be edited, reorganized, removed from book, and deleted. This behavior may change in the future. When a parent node is deleted, it may leave behind child nodes.  These nodes are now <em>orphans</em>. Administrators should periodically <a href=\"%orphans-book\">review their books for orphans</a> and reaffiliate those pages as desired. Finally, administrators may also <a href=\"%export-book\">export their books</a> to a single, flat HTML page which is suitable for printing.</p>
Dries's avatar
   
Dries committed
785
786
      <h3>Maintaining a FAQ using a collaborative book</h3>
      <p>Collaborative books let you easily set up a Frequently Asked Questions (FAQ) section on your web site. The main benefit is that you don't have to write all the questions/answers by yourself - let the community do it for you!</p>
787
      <p>In order to set up the FAQ, you have to create a new book which will hold all your content. To do so, click on the <a href=\"%create\">create content &raquo; book page</a> link. Give it a thoughtful title, and body. A title like \"Estonia Travel - FAQ\" is nice. You may always edit these fields later. You will probably want to designate <em>&lt;top-level&gt;</em> as the parent of this page. Leave the <em>log message</em> and <em>type</em> fields blank for now. After you have submitted this book page, you are ready to begin filling up your book with questions that are frequently asked.</p>
788
      <p>Whenever you come across a post which you want to include in your FAQ, click on the <em>administer</em> link. Then click on the <em>edit book outline</em> button at the bottom of the page. Then place the relevant post wherever is most appropriate in your book by selecting a <em>parent</em>. Books are quite flexible. They can have sections like <em>Flying to Estonia</em>, <em>Eating in Estonia</em> and so on. As you get more experienced with the book module, you can reorganize posts in your book so that it stays organized.</p>
789
      <p>Notes:</p><ul><li>Any comments attached to those relevant posts which you designate as book pages will also be transported into your book. This is a great feature, since much wisdom is shared via comments. Remember that all future comments and edits will automatically be reflected in your book.</li><li>You may wish to edit the title of posts when adding them to your FAQ. This is done on the same page as the <em>Edit book outline</em> button. Clear titles improve navigability enormously.</li><li>Book pages may come from any content type (blog, story, page, etc.). If you are creating a post solely for inclusion in your book, then use the <a href=\"%create\">create content &raquo; book page</a> link.</li><li>If you don't see the <em>administer</em> link, then you probably have insufficient <a href=\"%permissions\">permissions</a>.</li><li>If you want to get really fancy, note that books are one of the few content types which allow raw PHP in their <em>body</em>. So you've got lots of geeky possibilities there.</li></ul>", array("%permissions" => url("admin/user/configure/permission"), "%create" => url("node/add/book"), "%collaborative-book" => url("admin/node/book"), "%orphans-book" => url("admin/node/book/orphan"), "%export-book" => url("book/print")));
Dries's avatar
   
Dries committed
790
    case 'admin/modules#description':
Dries's avatar
   
Dries committed
791
      return t('Allows users to collaboratively author a book.');
Dries's avatar
   
Dries committed
792
    case 'admin/node/book':
Dries's avatar
   
Dries committed
793
      return t('The book module offers a mean to organize content, authored by many users, in an online manual, outline or FAQ.');
Dries's avatar
   
Dries committed
794
    case 'admin/node/book/orphan':
Dries's avatar
   
Dries committed
795
      return t('Pages in a book are like a tree. As pages are edited, reorganized and removed, child pages might be left with no link to the rest of the book.  Such pages are referred to as "orphan pages".  On this page, administrators can review their books for orphans and reattach those pages as desired.');
Dries's avatar
   
Dries committed
796
    case 'node/add#book':
Dries's avatar
   
Dries committed
797
      return t("A book is a collaborative writing effort: users can collaborate writing the pages of the book, positioning the pages in the right order, and reviewing or modifying pages previously written.  So when you have some information to share or when you read a page of the book and you didn't like it, or if you think a certain page could have been written better, you can do something about it.");
Dries's avatar
   
Dries committed
798
  }
799
}
Dries's avatar
   
Dries committed
800
801

function book_help_page() {
Dries's avatar
   
Dries committed
802
  print theme('page', book_help('admin/help#book'));
Dries's avatar
   
Dries committed
803
}
Dries's avatar
   
Dries committed
804

Dries's avatar
   
Dries committed
805
?>