book.module 31.9 KB
Newer Older
Dries's avatar
 
Dries committed
1
<?php
2
// $Id$
Dries's avatar
 
Dries committed
3

Dries's avatar
   
Dries committed
4
5
function book_node_name($node) {
  return t("book page");
Dries's avatar
   
Dries committed
6
7
}

Dries's avatar
   
Dries committed
8
9
10
11
function book_perm() {
  return array("maintain books");
}

Dries's avatar
   
Dries committed
12
function book_access($op, $node) {
Dries's avatar
   
Dries committed
13
  global $user;
Dries's avatar
   
Dries committed
14
15

  if ($op == "view") {
Dries's avatar
   
Dries committed
16
17
18
19
20
21
22
23
    /*
    ** 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_view() function.
    */

    return $node->status;
Dries's avatar
   
Dries committed
24
25
  }

Dries's avatar
   
Dries committed
26
  if ($op == "create") {
Dries's avatar
   
Dries committed
27
28
29
30
31
    /*
    ** Only registered users can create book pages.  Given the nature
    ** of the book module this is considered to be a good/safe idea.
    */

Dries's avatar
   
Dries committed
32
    return user_access("maintain books");
Dries's avatar
   
Dries committed
33
34
35
  }

  if ($op == "update") {
Dries's avatar
   
Dries committed
36
    /*
Dries's avatar
   
Dries committed
37
38
    ** Only registered users can update book pages.  Given the nature
    ** of the book module this is considered to be a good/safe idea.
Dries's avatar
   
Dries committed
39
    ** One can only update a book page if there are no suggested updates
Dries's avatar
   
Dries committed
40
41
42
43
    ** of that page waiting for approval, when it is not a PHP-page 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.
Dries's avatar
   
Dries committed
44
    */
Dries's avatar
   
Dries committed
45

Dries's avatar
   
Dries committed
46
    return user_access("maintain books") && !$node->moderate && !$node->format && $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
62
63
  if ($type == 'node' && $node->type == 'book') {
    if (book_access('update', $node)) {
      $links[] = l(t('edit this page'), "node/edit/$node->nid", array('title' => t('Suggest an update for this book page.')));
Dries's avatar
   
Dries committed
64
    }
Dries's avatar
   
Dries committed
65
    if (!$main) {
Dries's avatar
   
Dries committed
66
      $links[] = l(t('printer-friendly version'), "book/print/$node->nid", array('title' => t('Show a printer-friendly version of this book page and its sub-pages.')));
Dries's avatar
   
Dries committed
67
    }
Dries's avatar
   
Dries committed
68
69
  }

Dries's avatar
   
Dries committed
70
71
  if ($type == 'system') {
    menu('node/add/book', t('book page'), user_access('maintain books') ? 'node_page' : MENU_DENIED, 0);
Dries's avatar
   
Dries committed
72

Dries's avatar
   
Dries committed
73
74
75
76
77
78
79
    menu('admin/node/book', t('books'), user_access('administer nodes') ? 'book_admin' : MENU_DENIED, 4);
    menu('admin/node/book/orphan', t('orphan pages'), user_access('administer nodes') ? 'book_admin_orphan' : MENU_DENIED, 8);
    menu('admin/node/book/help', t('help'), user_access('administer nodes') ? 'book_help_page' : MENU_DENIED, 9);

    $result = db_query("SELECT n.nid, n.title FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE b.parent = 0 ORDER BY b.weight, n.title");
    while ($book = db_fetch_object($result)) {
      menu("admin/node/book/$book->nid", t('"%title" book', array('%title' => $book->title)), user_access('administer nodes') ? 'book_admin' : MENU_DENIED);
Dries's avatar
   
Dries committed
80
    }
Dries's avatar
   
Dries committed
81
    menu('book', t('books'), user_access('access content') ? 'book_page' : MENU_DENIED, 0, MENU_HIDE);
Dries's avatar
   
Dries committed
82
83
  }

Dries's avatar
   
Dries committed
84
  return $links;
Dries's avatar
   
Dries committed
85
86
}

Dries's avatar
   
Dries committed
87
88
89
90
function book_block($op = 'list', $delta = 0) {

  // Only display this block when the user is browsing a book:
  if (arg(0) == 'book' && arg(1) == 'view' && $nid = arg(2)) {
Dries's avatar
Dries committed
91
    $page = 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", $nid));
Dries's avatar
   
Dries committed
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114

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

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

    $title = $path[0]->title;
    $table = book_tree($expand[0], 5, $expand);
  }

  if ($op == 'list') {
    $block[0]['info'] = t('Book navigation');
  }
  else {
    $block['subject'] = $title;
    $block['content'] = $table;
  }

   return $block;
}

Dries's avatar
   
Dries committed
115
function book_load($node) {
Dries's avatar
   
Dries committed
116
  global $user;
Dries's avatar
   
Dries committed
117

Dries's avatar
   
Dries committed
118
  $book = db_fetch_object(db_query("SELECT format, parent, weight, log FROM {book} WHERE nid = %d", $node->nid));
Dries's avatar
   
Dries committed
119

Dries's avatar
   
Dries committed
120
  if (arg(1) == 'edit' && !user_access("administer nodes")) {
Dries's avatar
   
Dries committed
121
122
    /*
    ** If a user is about to update a book page, we overload some
Dries's avatar
   
Dries committed
123
    ** fields to reflect the changes.
Dries's avatar
   
Dries committed
124
125
    */

Dries's avatar
   
Dries committed
126
127
128
129
130
131
132
133
    if ($user->uid) {
      $book->uid = $user->uid;
      $book->name = $user->name;
    }
    else {
      $book->uid = 0;
      $book->name = "";
    }
Dries's avatar
   
Dries committed
134
  }
Dries's avatar
   
Dries committed
135

Dries's avatar
   
Dries committed
136
137
138
  /*
  ** We set the revision field to indicate that we have to create
  ** a new revision when updating this book page.  We enable this
Dries's avatar
   
Dries committed
139
  ** always such that the "edit this page"-links appear.
Dries's avatar
   
Dries committed
140
  */
Dries's avatar
   
Dries committed
141

Dries's avatar
   
Dries committed
142
  $book->revision = 1;
Dries's avatar
   
Dries committed
143

Dries's avatar
   
Dries committed
144
  return $book;
Dries's avatar
   
Dries committed
145
146
}

Dries's avatar
   
Dries committed
147
function book_insert($node) {
Dries's avatar
   
Dries committed
148
  db_query("INSERT INTO {book} (nid, format, parent, weight, log) VALUES (%d, %d, %d, %d, '%s')", $node->nid, $node->format, $node->parent, $node->weight, $node->log);
Dries's avatar
   
Dries committed
149
}
Dries's avatar
   
Dries committed
150

Dries's avatar
   
Dries committed
151
function book_update($node) {
Dries's avatar
   
Dries committed
152
  db_query("UPDATE {book} SET format = %d, parent = %d, weight = %d, log = '%s' WHERE nid = %d", $node->format, $node->parent, $node->weight, $node->log, $node->nid);
Dries's avatar
   
Dries committed
153
}
Dries's avatar
   
Dries committed
154

155
function book_delete(&$node) {
Dries's avatar
   
Dries committed
156
  db_query("DELETE FROM {book} WHERE nid = %d", $node->nid);
Dries's avatar
   
Dries committed
157
158
}

159
function book_validate(&$node) {
160
  if ($node->format && user_access("create php content")) {
161
162
163
164
165
166
    // Do not filter PHP code, do not auto-extract a teaser
    $node->teaser = $node->body;
  }
  else {
    $node->format = 0;
  }
Dries's avatar
   
Dries committed
167

168
169
170
171
172
173
  // Set default values for non administrators:
  if (!user_access("administer nodes")) {
    $node->format = 0;
    $node->weight = 0;
    $node->revision = 1;
  }
Dries's avatar
   
Dries committed
174
175
}

Dries's avatar
   
Dries committed
176
function book_form(&$node, &$error) {
Dries's avatar
   
Dries committed
177
  global $user;
Dries's avatar
   
Dries committed
178

Dries's avatar
   
Dries committed
179
  $op = $_POST["op"];
180
  $output = form_select(t("Parent"), "parent", $node->parent, book_toc(), t("The parent subject or category the page belongs in."));
Dries's avatar
   
Dries committed
181

182
183
184
185
  if (function_exists("taxonomy_node_form")) {
    $output .= implode("", taxonomy_node_form("book", $node));
  }

Dries's avatar
   
Dries committed
186
  $output .= form_textarea(t("Body"), "body", $node->body, 60, 20, filter_tips_short());
187
  $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
188
189

  if (user_access("administer nodes")) {
Dries's avatar
   
Dries committed
190
    $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
191
    if (user_access("create php content")) {
Dries's avatar
   
Dries committed
192
      $output .= form_radios("Type", "format", $node->format, array(0 => "HTML / text", 1 => "PHP"));
Dries's avatar
   
Dries committed
193
    }
Dries's avatar
   
Dries committed
194
195
196
197
198
199
200
201
202
203
204
205
206
  }
  else {
    /*
    ** If a regular user updates a book page, we create a new revision
    ** authored by that user:
    */

    $output .= form_hidden("revision", 1);
  }

  return $output;
}

Dries's avatar
   
Dries committed
207
function book_node_link($node = 0) {
Dries's avatar
   
Dries committed
208
209
210
211
  global $user;

  $op = $_POST["op"];
  $edit = $_POST["edit"];
Dries's avatar
   
Dries committed
212
213
214
215
216
217
218
219

  if ($node->type != "book") {

    if ($edit["nid"]) {
      $node = node_load(array("nid" => $edit["nid"]));
    }

    if ($op == t("Add to book outline")) {
Dries's avatar
   
Dries committed
220
      db_query("INSERT INTO {book} (nid, parent, weight) VALUES (%d, %d, %d)", $node->nid, $edit["parent"], $edit["weight"]);
Dries's avatar
   
Dries committed
221
      drupal_set_message(t("added the node to the book."));
Dries's avatar
   
Dries committed
222
223
224
    }

    if ($op == t("Update book outline")) {
Dries's avatar
   
Dries committed
225
      db_query("UPDATE {book} SET parent = %d, weight = %d WHERE nid = %d", $edit["parent"], $edit["weight"], $node->nid);
Dries's avatar
   
Dries committed
226
      drupal_set_message(t("updated the book outline."));
Dries's avatar
   
Dries committed
227
228
229
    }

    if ($op == t("Remove from book outline")) {
Dries's avatar
   
Dries committed
230
      db_query("DELETE FROM {book} WHERE nid = %d", $node->nid);
Dries's avatar
   
Dries committed
231
      drupal_set_message(t("removed the node form the book."));
Dries's avatar
   
Dries committed
232
233
    }

234
    $output .= "<h3>". t("Edit book outline for node %booktitle", array("%booktitle" => "<em>$node->title</em>")) ."</h3>";
Dries's avatar
   
Dries committed
235
236

    if ($edit["nid"]) {
Dries's avatar
   
Dries committed
237
      $page = db_fetch_object(db_query("SELECT * FROM {book} WHERE nid = %d", $node->nid));
Dries's avatar
   
Dries committed
238
239

      $output .= form_select(t("Parent"), "parent", $page->parent, book_toc(), t("The parent subject or category the page belongs in."));
Dries's avatar
   
Dries committed
240
      $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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256

      if ($page->nid) {
        $output .= form_submit(t("Update book outline"));
        $output .= form_submit(t("Remove from book outline"));
      }
      else {
        $output .= form_submit(t("Add to book outline"));
      }

    }
    else {
      $output .= form_submit(t("Edit book outline"));
    }

    $output .= form_hidden("nid", $node->nid);

Dries's avatar
   
Dries committed
257
    return form($output, "post", url("admin/node/book"));
Dries's avatar
   
Dries committed
258
259
260
  }
}

Dries's avatar
   
Dries committed
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
/*
** Return the the most recent revision that matches the specified
** conditions.
*/

function book_revision_load($page, $conditions = array()) {

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

  foreach ($revisions as $revision) {

    /*
    ** Extract the specified revision:
    */

    $node = node_revision_load($page, $revision);

    /*
    ** Check to see if the conditions are met:
    */

    $status = 1;

    foreach ($conditions as $key => $value) {
      if ($node->$key != $value) {
        $status = 0;
      }
    }

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

/*
** Return the path (call stack) to a certain book page.
*/
Dries's avatar
   
Dries committed
299
function book_location($node, $nodes = array()) {
Dries's avatar
   
Dries committed
300
301
  // TODO: eliminate the recursion

Dries's avatar
   
Dries committed
302
  $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
303
304
305
306
307
308
309
  if ($parent->title) {
    $nodes = book_location($parent, $nodes);
    array_push($nodes, $parent);
  }
  return $nodes;
}

Dries's avatar
   
Dries committed
310
function book_location_down($node, $nodes = array()) {
Dries's avatar
   
Dries committed
311
312
  // TODO: eliminate the recursion

Dries's avatar
   
Dries committed
313
  $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
314
315
316
317
318
319
320
321
  if ($last_direct_child) {
    array_push($nodes, $last_direct_child);
    $nodes = book_location_down($last_direct_child, $nodes);
  }
  return $nodes;
}

function book_prev($node) {
Dries's avatar
   
Dries committed
322
323
324
325
326
  // if the parent is zero, we are at the start of a book so there is no previous
  if ($node->parent == 0) {
    return NULL;
  }

Dries's avatar
   
Dries committed
327
  // previous on the same level
Dries's avatar
   
Dries committed
328
  $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
329
330
331
  if ($direct_above) {
    // get last leaf of $above
    $path = book_location_down($direct_above);
Dries's avatar
   
Dries committed
332
333

    return $path ? (count($path) > 0 ? array_pop($path) : NULL) : $direct_above;
Dries's avatar
   
Dries committed
334
335
336
  }
  else {
    // direct parent
Dries's avatar
   
Dries committed
337
    $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
338
339
340
341
342
343
    return $prev;
  }
}

function book_next($node) {
  // get first direct child
Dries's avatar
   
Dries committed
344
  $child = 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 != '') ORDER BY b.weight ASC, n.title ASC", $node->nid));
Dries's avatar
   
Dries committed
345
346
347
348
  if ($child) {
    return $child;
  }

Dries's avatar
   
Dries committed
349
  // no direct child: get next for this level or any parent in this book
350
351
  array_push($path = book_location($node), $node); // path to top-level node including this one

Dries's avatar
   
Dries committed
352
  while (($leaf = array_pop($path)) && count($path)) {
Dries's avatar
   
Dries committed
353
    $next = 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 ASC, n.title ASC", $leaf->parent, $leaf->weight, $leaf->weight, $leaf->title));
Dries's avatar
   
Dries committed
354
355
356
357
358
359
    if ($next) {
      return $next;
    }
  }
}

Dries's avatar
   
Dries committed
360
function book_content($node, $main = 0) {
Dries's avatar
   
Dries committed
361
  $op = $_POST["op"];
Dries's avatar
   
Dries committed
362

Dries's avatar
   
Dries committed
363
364
  /*
  ** Always display the most recently approved revision of a node
Dries's avatar
   
Dries committed
365
366
  ** (if any) unless we have to display this page in the context of
  ** the moderation queue.
Dries's avatar
   
Dries committed
367
368
  */

Dries's avatar
   
Dries committed
369
  if ($op != t("Preview") && $node->moderate && arg(0) != "queue") {
Dries's avatar
   
Dries committed
370
371
372
373
374
    $revision = book_revision_load($node, array("moderate" => 0, "status" => 1));

    if ($revision) {
      $node = $revision;
    }
Dries's avatar
   
Dries committed
375
376
  }

Dries's avatar
   
Dries committed
377
378
379
380
381
  /*
  ** Extract the page body.  If body is dynamic (using PHP code), the body
  ** will be generated.
  */

Dries's avatar
   
Dries committed
382
383
384
385
386
387
388
389
390
391
392
393
  if ($node->format == 1) {
    // Make sure only authorized users can preview PHP pages.
    if ($op == t("Preview") && !user_access("create php content")) {
      return;
    }

    ob_start();
    eval($node->body);
    $node->teaser = $node->body = ob_get_contents();
    ob_end_clean();
  }
  else {
Dries's avatar
   
Dries committed
394
    $node = node_prepare($node, $main);
Dries's avatar
   
Dries committed
395
  }
Dries's avatar
   
Dries committed
396

Dries's avatar
   
Dries committed
397
398
399
  return $node;
}

Dries's avatar
   
Dries committed
400
function book_view($node, $main = 0, $page = 0) {
Dries's avatar
   
Dries committed
401
  $node = book_content($node, $main);
Dries's avatar
   
Dries committed
402
403
404
405
406
  /*
  ** Display the node.  If not displayed on the main page, we render
  ** the node as a page in the book with extra links to the previous
  ** and the next page.
  */
Dries's avatar
 
Dries committed
407

Dries's avatar
   
Dries committed
408
409
  $output = "";

Dries's avatar
   
Dries committed
410
  if ($main) {
Dries's avatar
   
Dries committed
411
    $output .= theme("node", $node, $main, $page);
Dries's avatar
   
Dries committed
412
  }
Dries's avatar
   
Dries committed
413
  else {
Dries's avatar
   
Dries committed
414
415
416
    if ($node->moderate) {
      $node->body = $node->body . "<div class=\"log\"><div class=\"title\">". t("Log") .":</div>$node->log</div>";
    }
Dries's avatar
   
Dries committed
417
    // Add the navigation and the breadcrumb if we view a page
Dries's avatar
   
Dries committed
418
    if ($page) {
Dries's avatar
   
Dries committed
419
      $node = book_navigation($node);
Dries's avatar
   
Dries committed
420
      // Print the breadcrumb
Dries's avatar
   
Dries committed
421
      drupal_set_breadcrumb($node->breadcrumb);
Dries's avatar
   
Dries committed
422
    }
Dries's avatar
   
Dries committed
423
    // Print the node
Dries's avatar
   
Dries committed
424
    $output .= theme("node", $node, $main, $page);
Dries's avatar
   
Dries committed
425
  }
Dries's avatar
   
Dries committed
426
427

  return $output;
Dries's avatar
   
Dries committed
428
429
430
}

function book_show($node, $cid) {
Dries's avatar
   
Dries committed
431
  $output = "";
Dries's avatar
   
Dries committed
432

Dries's avatar
   
Dries committed
433
  if (node_access("view", $node)) {
Dries's avatar
   
Dries committed
434

Dries's avatar
   
Dries committed
435
    if ($node->type == "book") {
Dries's avatar
   
Dries committed
436
      $output .= book_view($node, 0, 1);
Dries's avatar
   
Dries committed
437
438
    }
    else {
Dries's avatar
   
Dries committed
439

Dries's avatar
   
Dries committed
440
      if (node_hook($node, "content")) {
Dries's avatar
   
Dries committed
441
        $node = node_invoke($node, "content");
Dries's avatar
   
Dries committed
442

Dries's avatar
   
Dries committed
443
444
445
        /*
        ** Add the book navigation if the node is in the book.
        */
Dries's avatar
   
Dries committed
446

Dries's avatar
   
Dries committed
447
        $book = db_fetch_object(db_query("SELECT * FROM {book} WHERE nid = %d", $node->nid));
Dries's avatar
   
Dries committed
448

Dries's avatar
   
Dries committed
449
450
451
452
453
454
        if ($book) {
          foreach ($book as $key => $value) {
            $node->$key = $value;
          }
          $node = book_navigation($node);
        }
Dries's avatar
   
Dries committed
455

Dries's avatar
   
Dries committed
456
457
458
        /*
        ** make $node->type a book. This is for the links.
        */
Dries's avatar
   
Dries committed
459

Dries's avatar
   
Dries committed
460
        $node->type = "book";
Dries's avatar
   
Dries committed
461

Dries's avatar
   
Dries committed
462
463
464
        /*
        ** View the node
        */
Dries's avatar
   
Dries committed
465
466
        drupal_set_breadcrumb($node->breadcrumb);
        $output .= theme("node", $node, 0, 1);
Dries's avatar
   
Dries committed
467
468
469
470
471
472
473
      }
      else {

        /*
        ** We can't get the content of the node and just view the node.
        ** We don't add breadcrums or links.
        */
Dries's avatar
   
Dries committed
474
        $output .= node_view($node, 0, 1);
Dries's avatar
   
Dries committed
475
476
      }
    }
Dries's avatar
   
Dries committed
477
    if (function_exists("comment_render") && $node->comment) {
Dries's avatar
   
Dries committed
478
      $output .= comment_render($node, $cid);
Dries's avatar
   
Dries committed
479
480
    }

Dries's avatar
   
Dries committed
481
    /*
Dries's avatar
   
Dries committed
482
    ** Update the history table, stating that this user viewed this node.
Dries's avatar
   
Dries committed
483
    */
Dries's avatar
   
Dries committed
484
485
    node_tag_new($node->nid);
  }
Dries's avatar
   
Dries committed
486
487
488
489
  else {
    $output .= message_access();
  }
  return $output;
Dries's avatar
   
Dries committed
490
}
Dries's avatar
   
Dries committed
491

Dries's avatar
   
Dries committed
492
function book_navigation($node) {
Dries's avatar
   
Dries committed
493

Dries's avatar
   
Dries committed
494
  $path = book_location($node);
Dries's avatar
   
Dries committed
495

Dries's avatar
   
Dries committed
496
497
498
499
500
501
502
503
504
  /*
  ** Construct the breadcrumb:
  */

  $node->breadcrumb = ""; // Overwrite the trail with a book trail.
  $node->breadcrumb[] = l(t("Home"), "");
  foreach ($path as $level) {
    $node->breadcrumb[] = l($level->title, "book/view/$level->nid");
  }
Dries's avatar
   
Dries committed
505

Dries's avatar
   
Dries committed
506
507
508
509
510
  if ($node->nid) {
    $output .= "<div class=\"book\">";

    if ($tree = book_tree($node->nid)) {
      $output .= "<div class=\"tree\">". book_tree($node->nid) ."</div>";
Dries's avatar
   
Dries committed
511
    }
Dries's avatar
   
Dries committed
512

Dries's avatar
   
Dries committed
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
    if ($prev = book_prev($node)) {
      $links .= "<div class=\"prev\">";
      $links .= l(t("previous"), "book/view/$prev->nid", array("title" => t("View the previous page.")));
      $links .= "</div>";
      $titles .= "<div class=\"prev\">$prev->title</div>";
    }
    else {
      $links .= "<div class=\"prev\">&nbsp;</div>"; // make an empty div to fill the space
    }
    if ($next = book_next($node)) {
      $links .= "<div class=\"next\">";
      $links .= l(t("next"), "book/view/$next->nid", array("title" => t("View the next page.")));
      $links .= "</div>";
      $titles .= "<div class=\"next\">$next->title</div>";
    }
    else {
      $links .= "<div class=\"next\">&nbsp;</div>"; // make an empty div to fill the space
    }
    if ($node->parent) {
      $links .= "<div class=\"up\">";
      $links .= l(t("up"), "book/view/$node->parent", array("title" => t("View this page's parent section.")));
      $links .= "</div>";
    }
Dries's avatar
   
Dries committed
536

Dries's avatar
   
Dries committed
537
538
539
540
541
542
    $output .= "<div class=\"nav\">";
    $output .= " <div class=\"links\">$links</div>";
    $output .= " <div class=\"titles\">$titles</div>";
    $output .= "</div>";
    $output .= "</div>";
  }
Dries's avatar
   
Dries committed
543

Dries's avatar
   
Dries committed
544
  $node->body = $node->body.$output;
Dries's avatar
   
Dries committed
545

Dries's avatar
   
Dries committed
546
  return $node;
Dries's avatar
   
Dries committed
547
}
Dries's avatar
 
Dries committed
548

Dries's avatar
   
Dries committed
549
550
551
552
553
554
555
556
557
558
559
560
function book_toc_recurse($nid, $indent, $toc, $children) {

  if ($children[$nid]) {
    foreach ($children[$nid] as $foo => $node) {
      $toc[$node->nid] = "$indent $node->title";
      $toc = book_toc_recurse($node->nid, "$indent--", $toc, $children);
    }
  }

  return $toc;
}

Dries's avatar
   
Dries committed
561
function book_toc($parent = 0, $indent = "", $toc = array()) {
Dries's avatar
   
Dries committed
562

Dries's avatar
   
Dries committed
563
  $result = db_query("SELECT n.nid, n.title, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = '1' ORDER BY b.weight, n.title");
Dries's avatar
   
Dries committed
564

Dries's avatar
   
Dries committed
565
  while ($node = db_fetch_object($result)) {
Dries's avatar
   
Dries committed
566
567
568
569
    if (!$children[$node->parent]) {
      $children[$node->parent] = array();
    }
    array_push($children[$node->parent], $node);
Dries's avatar
   
Dries committed
570
  }
Dries's avatar
   
Dries committed
571
572

  /*
573
574
  ** If the user is an administrator, add the top-level book page;
  ** only administrators can start new books.
Dries's avatar
   
Dries committed
575
  */
Dries's avatar
   
Dries committed
576

Dries's avatar
   
Dries committed
577
  if (user_access("administer nodes")) {
578
    $toc[0] = "<". t("top-level") .">";
Dries's avatar
   
Dries committed
579
580
  }

Dries's avatar
   
Dries committed
581
  $toc = book_toc_recurse($parent, $indent, $toc, $children);
Dries's avatar
   
Dries committed
582

Dries's avatar
   
Dries committed
583
584
585
  return $toc;
}

Dries's avatar
 
Dries committed
586

Dries's avatar
   
Dries committed
587
function book_tree_recurse($nid, $depth, $children, $unfold = array()) {
Dries's avatar
   
Dries committed
588
  if ($depth > 0) {
Dries's avatar
   
Dries committed
589
590
    if ($children[$nid]) {
      foreach ($children[$nid] as $foo => $node) {
Dries's avatar
   
Dries committed
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
        if (in_array($node->nid, $unfold)) {
          if ($tree = book_tree_recurse($node->nid, $depth - 1, $children, $unfold)) {
            $output .= '<li class="expanded">';
            $output .= l($node->title, "book/view/$node->nid");
            $output .= "<ul>$tree</ul>";
            $output .= '</li>';
          }
          else {
            $output .= '<li class="leaf">'. l($node->title, "book/view/$node->nid") .'</li>';
          }
        }
        else {
          if ($tree = book_tree_recurse($node->nid, 1, $children)) {
            $output .= '<li class="collapsed">'. l($node->title, "book/view/$node->nid") .'</li>';
          }
          else {
            $output .= '<li class="leaf">'. l($node->title, "book/view/$node->nid") .'</li>';
          }
Dries's avatar
   
Dries committed
609
        }
Dries's avatar
   
Dries committed
610
611
      }
    }
Dries's avatar
   
Dries committed
612
613
614
615
616
  }

  return $output;
}

Dries's avatar
   
Dries committed
617

Dries's avatar
   
Dries committed
618
function book_tree($parent = 0, $depth = 3, $unfold = array()) {
Dries's avatar
   
Dries committed
619

Dries's avatar
   
Dries committed
620
  $result = db_query("SELECT n.nid, n.title, b.parent FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = '1' AND n.moderate = '0' ORDER BY b.weight, n.title");
Dries's avatar
   
Dries committed
621

Dries's avatar
   
Dries committed
622
623
624
625
  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
626
  }
Dries's avatar
   
Dries committed
627

Dries's avatar
   
Dries committed
628
629
630
  if ($tree = book_tree_recurse($parent, $depth, $children, $unfold)) {
    return "<ul>$tree</ul>";
  }
Dries's avatar
   
Dries committed
631
632
}

Dries's avatar
   
Dries committed
633

Dries's avatar
   
Dries committed
634
function book_render() {
Dries's avatar
   
Dries committed
635

Dries's avatar
   
Dries committed
636
  $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
637

Dries's avatar
   
Dries committed
638
639
640
641
  while ($page = db_fetch_object($result)) {
    // load the node:
    $node = node_load(array("nid" => $page->nid));

Dries's avatar
   
Dries committed
642
    if ($node) {
Dries's avatar
   
Dries committed
643
644
      // take the most recent approved revision, extract the page and check output:
      $node = book_content($node);
Dries's avatar
   
Dries committed
645
      // output the content:
Dries's avatar
   
Dries committed
646
      $output .= "<div class=\"book\">";
Dries's avatar
   
Dries committed
647
      $output .= "<div class=\"title\">". l($node->title, "book/view/$node->nid") ."</div>";
Dries's avatar
   
Dries committed
648
      $output .= "<div class=\"body\">". $node->body ."</div>";
Dries's avatar
   
Dries committed
649
      $output .= "</div>";
Dries's avatar
   
Dries committed
650
    }
Dries's avatar
   
Dries committed
651
652
  }

Dries's avatar
   
Dries committed
653
  drupal_set_title(t("Books"));
Dries's avatar
   
Dries committed
654
  print theme("page", $output);
Dries's avatar
   
Dries committed
655
656
657
}

function book_page() {
Dries's avatar
   
Dries committed
658

Dries's avatar
   
Dries committed
659
  if (user_access("access content")) {
Dries's avatar
   
Dries committed
660
    switch (arg(1)) {
Dries's avatar
   
Dries committed
661
      case "view":
Dries's avatar
   
Dries committed
662
        $node = node_load(array("nid" => arg(2)));
Dries's avatar
   
Dries committed
663
664
        $output = book_show($node, arg(3));
        print theme("page", $output, $node->title);
Dries's avatar
   
Dries committed
665
        break;
Dries's avatar
   
Dries committed
666
      case "print":
Dries's avatar
   
Dries committed
667
        print book_print(arg(2), $depth = 1);
Dries's avatar
   
Dries committed
668
669
670
        break;
      default:
        book_render();
Dries's avatar
   
Dries committed
671
672
673
    }
  }
  else {
Dries's avatar
   
Dries committed
674
    drupal_access_denied();
Dries's avatar
   
Dries committed
675
  }
Dries's avatar
 
Dries committed
676
677
}

678
function book_print($id = "", $depth = 1) {
Dries's avatar
   
Dries committed
679
  global $base_url;
680
  $result = db_query("SELECT n.nid FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND n.nid = %d AND (n.moderate = 0 OR n.revisions IS NOT NULL) ORDER BY b.weight, n.title", $id);
Dries's avatar
   
Dries committed
681

Dries's avatar
   
Dries committed
682
683
684
  while ($page = db_fetch_object($result)) {
    // load the node:
    $node = node_load(array("nid" => $page->nid));
Dries's avatar
   
Dries committed
685

Dries's avatar
   
Dries committed
686
687
    if ($node) {
      // output the content:
Dries's avatar
   
Dries committed
688
      if (node_hook($node, "content")) {
Dries's avatar
   
Dries committed
689
690
        $node = node_invoke($node, "content");
      }
Dries's avatar
   
Dries committed
691
      $output .= "<h1 id=\"$node->nid\" name=\"$node->nid\" class=\"book-h$depth\">$node->title</h1>";
Dries's avatar
   
Dries committed
692

Dries's avatar
   
Dries committed
693
      if ($node->body) {
Dries's avatar
   
Dries committed
694
        $output .= $node->body;
Dries's avatar
   
Dries committed
695
      }
Dries's avatar
   
Dries committed
696
    }
Dries's avatar
   
Dries committed
697
  }
Dries's avatar
   
Dries committed
698

699
  $output .= book_print_recurse($id, $depth);
Dries's avatar
   
Dries committed
700

Dries's avatar
   
Dries committed
701
702
703
704
705
706
  $html = "<html><head><title>$node->title</title>";
  $html .= "<base href=\"$base_url/\" />";
  $html .= "<style type=\"text/css\">\n@import url(misc/print.css);\n</style>";
  $html .= "</head><body>". $output ."</body></html>";

  return $html;
Dries's avatar
   
Dries committed
707
708
}

709
function book_print_recurse($parent = "", $depth = 1) {
Dries's avatar
   
Dries committed
710
  $result = db_query("SELECT n.nid FROM {node} n INNER JOIN {book} b ON n.nid = b.nid WHERE n.status = 1 AND b.parent = '$parent' AND (n.moderate = 0 OR n.revisions IS NOT NULL) ORDER BY b.weight, n.title");
Dries's avatar
   
Dries committed
711

Dries's avatar
   
Dries committed
712
713
714
715
716
717
  while ($page = db_fetch_object($result)) {
    // load the node:
    $node = node_load(array("nid" => $page->nid));

    // take the most recent approved revision:
    if ($node->moderate) {
Dries's avatar
   
Dries committed
718
      $node = book_revision_load($node, array("moderate" => 0, "status" => 1));
Dries's avatar
   
Dries committed
719
720
    }

Dries's avatar
   
Dries committed
721
722
    if ($node) {
      // output the content:
Dries's avatar
   
Dries committed
723
      if (node_hook($node, "content")) {
Dries's avatar
   
Dries committed
724
725
        $node = node_invoke($node, "content");
      }
Dries's avatar
   
Dries committed
726
      $output .= "<h1 id=\"$node->nid\" name=\"$node->nid\" class=\"book-h$depth\">$node->title</h1>";
Dries's avatar
   
Dries committed
727

Dries's avatar
   
Dries committed
728
      if ($node->body) {
Dries's avatar
   
Dries committed
729
        $output .= "<ul>". $node->body ."</ul>";
Dries's avatar
   
Dries committed
730
      }
Dries's avatar
   
Dries committed
731

732
      $output .= book_print_recurse($node->nid, $depth + 1);
Dries's avatar
   
Dries committed
733
    }
Dries's avatar
   
Dries committed
734
  }
Dries's avatar
   
Dries committed
735

Dries's avatar
   
Dries committed
736
737
  return $output;
}
Dries's avatar
   
Dries committed
738

Dries's avatar
   
Dries committed
739
740
function book_admin_view_line($node, $depth = 0) {

Dries's avatar
   
Dries committed
741
  $row = 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", $node->weight), l(t("view node"), "node/view/$node->nid"), l(t("edit node"), "admin/node/edit/$node->nid"), l(t("delete node"), "admin/node/delete/$node->nid"));
Dries's avatar
   
Dries committed
742
743

  return $row;
Dries's avatar
   
Dries committed
744
745
746
}

function book_admin_view_book($nid, $depth = 1) {
Dries's avatar
   
Dries committed
747
  $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
748
749
750

  while ($node = db_fetch_object($result)) {
    $node = node_load(array("nid" => $node->nid));
Dries's avatar
   
Dries committed
751
752
    $rows[] = book_admin_view_line($node, $depth);
    $rows = array_merge($rows, book_admin_view_book($node->nid, $depth + 1));
Dries's avatar
   
Dries committed
753
754
  }

Dries's avatar
   
Dries committed
755
  return $rows;
Dries's avatar
   
Dries committed
756
757
758
759
}

function book_admin_view($nid, $depth = 0) {

Dries's avatar
   
Dries committed
760
761
  if ($nid) {
    $node = node_load(array("nid" => $nid));
Dries's avatar
   
Dries committed
762

Dries's avatar
   
Dries committed
763
    $output .= "<h3>$node->title</h3>";
Dries's avatar
   
Dries committed
764

Dries's avatar
   
Dries committed
765
766
767
    $header = array(t("title"), t("weight"), array("data" => t("operations"), "colspan" => 3));
    $rows[] = book_admin_view_line($node);
    $rows = array_merge($rows, book_admin_view_book($nid));
Dries's avatar
   
Dries committed
768

Dries's avatar
   
Dries committed
769
    $output .= theme("table", $header, $rows);
Dries's avatar
   
Dries committed
770
    $output .= form_submit(t("Save book pages"));
Dries's avatar
   
Dries committed
771

Dries's avatar
   
Dries committed
772
773
    return form($output);
  }
Dries's avatar
   
Dries committed
774
775
776
777
}

function book_admin_save($nid, $edit = array()) {

Dries's avatar
   
Dries committed
778
779
  if ($nid) {
    $book = node_load(array("nid" => $nid));
Dries's avatar
   
Dries committed
780

Dries's avatar
   
Dries committed
781
782
783
784
    foreach ($edit as $nid => $value) {
      /*
      ** Check to see whether the title needs updating:
      */
Dries's avatar
   
Dries committed
785

Dries's avatar
   
Dries committed
786
      $title = db_result(db_query("SELECT title FROM {node} WHERE nid = %d", $nid));
Dries's avatar
   
Dries committed
787
      if ($title != $value["title"]) {
Dries's avatar
   
Dries committed
788
        db_query("UPDATE {node} SET title = '%s' WHERE nid = %d", $value["title"], $nid);
Dries's avatar
   
Dries committed
789
      }
Dries's avatar
   
Dries committed
790

Dries's avatar
   
Dries committed
791
792
793
      /*
      ** Check to see whether the weight needs updating:
      */
Dries's avatar
   
Dries committed
794

Dries's avatar
   
Dries committed
795
      $weight = db_result(db_query("SELECT weight FROM {book} WHERE nid = %d", $nid));
Dries's avatar
   
Dries committed
796
      if ($weight != $value["weight"]) {
Dries's avatar
   
Dries committed
797
        db_query("UPDATE {book} SET weight = %d WHERE nid = %d", $value["weight"], $nid);
Dries's avatar
   
Dries committed
798
      }
Dries's avatar
   
Dries committed
799
800
    }

Dries's avatar
   
Dries committed
801
802
    $message = t("updated book '%title'", array("%title" => $book->title));
    watchdog("special", $message);
Dries's avatar
   
Dries committed
803

Dries's avatar
   
Dries committed
804
805
    return $message;
  }
Dries's avatar
   
Dries committed
806
807
808
809
}

function book_admin_orphan() {

Dries's avatar
   
Dries committed
810
  $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
811
812
813
814
815

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

Dries's avatar
   
Dries committed
816
  if ($pages) {
Dries's avatar
   
Dries committed
817
818
    $output .= "<h3>Orphan pages</h3>";
    $header = array(t("title"), t("weight"), array("data" => t("operations"), "colspan" => 3));
Dries's avatar
   
Dries committed
819
820
    foreach ($pages as $nid => $node) {
      if ($node->parent && empty($pages[$node->parent])) {
Dries's avatar
   
Dries committed
821
822
        $rows[] = book_admin_view_line($node, $depth);
        $rows = array_merge($rows, book_admin_view_book($node->nid, $depth + 1));
Dries's avatar
   
Dries committed
823
      }
Dries's avatar
   
Dries committed
824
    }
Dries's avatar
   
Dries committed
825
    $output .= theme("table", $header, $rows);
Dries's avatar
   
Dries committed
826
827
  }

Dries's avatar
   
Dries committed
828
  print theme("page", $output);
Dries's avatar
   
Dries committed
829
830
831
832
833
834
}

function book_admin_links() {
}

function book_admin() {
Dries's avatar
   
Dries committed
835
836
  $op = $_POST["op"];
  $edit = $_POST["edit"];
Dries's avatar
   
Dries committed
837

Dries's avatar
   
Dries committed
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
  if (empty($op)) {
    $op = arg(3);
  }

  switch ($op) {
    case t("Edit book outline"):
    case t("Add to book outline"):
    case t("Remove from book outline"):
    case t("Update book outline"):
      $output = book_node_link();
      break;
    case "orphan":
      $output = book_admin_orphan();
      break;
    case t("Save book pages"):
      drupal_set_message(book_admin_save(arg(3), $edit));
      // fall through:
    default:
      $output .= book_admin_view(arg(3));
      break;
Dries's avatar
   
Dries committed
858
  }
Dries's avatar
   
Dries committed
859
  print theme("page", $output);
Dries's avatar
   
Dries committed
860
861
}

Dries's avatar
   
Dries committed
862
function book_help($section = "admin/help#book") {
Dries's avatar
   
Dries committed
863
  $output = "";
864

Dries's avatar
   
Dries committed
865
  switch ($section) {
Dries's avatar
   
Dries committed
866
    case 'admin/help#book':
Dries's avatar
   
Dries committed
867
868
      $output .= t("
      <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>
869
870
      <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>
      <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 offerred to administrators, since malicious users could abuse this power. In addiiton, 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>
871
      <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\">submit content &raquo; book page</a> link.</p>
872
      <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
873
874
      <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>
875
      <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\">submit 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>
876
877
      <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>
      <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\">submit 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/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
878
      break;
Dries's avatar
   
Dries committed
879
    case 'admin/system/modules#description':
Dries's avatar
   
Dries committed
880
      $output = t("Allows users to collaboratively author a book.");
Dries's avatar
   
Dries committed
881
882
      break;
    case 'admin/node/book':
Dries's avatar
   
Dries committed
883
      $output = 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
884
885
      break;
    case 'admin/node/book/orphan':
Dries's avatar
   
Dries committed
886
      $output = 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 refered 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
887
      break;
Dries's avatar
   
Dries committed
888
889
890
    case 'node/add#book':
      $output = 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.");
      break;
Dries's avatar
   
Dries committed
891
892
  }

Dries's avatar
   
Dries committed
893
  return $output;
894
}
Dries's avatar
   
Dries committed
895
896

function book_help_page() {
Dries's avatar
   
Dries committed
897
  print theme("page", book_help());
Dries's avatar
   
Dries committed
898
}
Dries's avatar
   
Dries committed
899

Dries's avatar
   
Dries committed
900
?>