xref: /plugin/include/helper.php (revision ff4c196636e10c33e0fc9b0ffc213e6e0524118c) 
1<?php
2/**
3 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
4 * @author     Esther Brunner <wikidesign@gmail.com>
5 * @author     Christopher Smith <chris@jalakai.co.uk>
6 * @author     Gina Häußge, Michael Klier <dokuwiki@chimeric.de>
7 */
8
9// must be run within Dokuwiki
10if (!defined('DOKU_INC')) die();
11
12if (!defined('DOKU_LF')) define('DOKU_LF', "\n");
13if (!defined('DOKU_TAB')) define('DOKU_TAB', "\t");
14if (!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN', DOKU_INC.'lib/plugins/');
15
16require_once(DOKU_INC.'inc/search.php');
17
18class helper_plugin_include extends DokuWiki_Plugin { // DokuWiki_Helper_Plugin
19
20    var $defaults  = array();
21    var $sec_close = true;
22    var $taghelper = null;
23    var $includes  = array(); // deprecated - compatibility code for the blog plugin
24
25    /**
26     * Constructor loads default config settings once
27     */
28    function helper_plugin_include() {
29        $this->defaults['firstsec']  = $this->getConf('firstseconly');
30        $this->defaults['editbtn']   = $this->getConf('showeditbtn');
31        $this->defaults['taglogos']  = $this->getConf('showtaglogos');
32        $this->defaults['footer']    = $this->getConf('showfooter');
33        $this->defaults['redirect']  = $this->getConf('doredirect');
34        $this->defaults['date']      = $this->getConf('showdate');
35        $this->defaults['user']      = $this->getConf('showuser');
36        $this->defaults['comments']  = $this->getConf('showcomments');
37        $this->defaults['linkbacks'] = $this->getConf('showlinkbacks');
38        $this->defaults['tags']      = $this->getConf('showtags');
39        $this->defaults['link']      = $this->getConf('showlink');
40        $this->defaults['permalink'] = $this->getConf('showpermalink');
41        $this->defaults['indent']    = $this->getConf('doindent');
42        $this->defaults['linkonly']  = $this->getConf('linkonly');
43        $this->defaults['title']     = $this->getConf('title');
44        $this->defaults['pageexists']  = $this->getConf('pageexists');
45        $this->defaults['parlink']   = $this->getConf('parlink');
46        $this->defaults['inline']    = false;
47        $this->defaults['depth']     = $this->getConf('depth');
48    }
49
50    /**
51     * Available methods for other plugins
52     */
53    function getMethods() {
54        $result = array();
55        $result[] = array(
56                'name'   => 'get_flags',
57                'desc'   => 'overrides standard values for showfooter and firstseconly settings',
58                'params' => array('flags' => 'array'),
59                );
60        return $result;
61    }
62
63    /**
64     * Overrides standard values for showfooter and firstseconly settings
65     */
66    function get_flags($setflags) {
67        // load defaults
68        $flags = $this->defaults;
69        foreach ($setflags as $flag) {
70            $value = '';
71            if (strpos($flag, '=') !== -1) {
72                list($flag, $value) = explode('=', $flag, 2);
73            }
74            switch ($flag) {
75                case 'footer':
76                    $flags['footer'] = 1;
77                    break;
78                case 'nofooter':
79                    $flags['footer'] = 0;
80                    break;
81                case 'firstseconly':
82                case 'firstsectiononly':
83                    $flags['firstsec'] = 1;
84                    break;
85                case 'fullpage':
86                    $flags['firstsec'] = 0;
87                    break;
88                case 'noheader':
89                    $flags['noheader'] = 1;
90                    break;
91                case 'editbtn':
92                case 'editbutton':
93                    $flags['editbtn'] = 1;
94                    break;
95                case 'noeditbtn':
96                case 'noeditbutton':
97                    $flags['editbtn'] = 0;
98                    break;
99                case 'permalink':
100                    $flags['permalink'] = 1;
101                    break;
102                case 'nopermalink':
103                    $flags['permalink'] = 0;
104                    break;
105                case 'redirect':
106                    $flags['redirect'] = 1;
107                    break;
108                case 'noredirect':
109                    $flags['redirect'] = 0;
110                    break;
111                case 'link':
112                    $flags['link'] = 1;
113                    break;
114                case 'nolink':
115                    $flags['link'] = 0;
116                    break;
117                case 'user':
118                    $flags['user'] = 1;
119                    break;
120                case 'nouser':
121                    $flags['user'] = 0;
122                    break;
123                case 'comments':
124                    $flags['comments'] = 1;
125                    break;
126                case 'nocomments':
127                    $flags['comments'] = 0;
128                    break;
129                case 'linkbacks':
130                    $flags['linkbacks'] = 1;
131                    break;
132                case 'nolinkbacks':
133                    $flags['linkbacks'] = 0;
134                    break;
135                case 'tags':
136                    $flags['tags'] = 1;
137                    break;
138                case 'notags':
139                    $flags['tags'] = 0;
140                    break;
141                case 'date':
142                    $flags['date'] = 1;
143                    break;
144                case 'nodate':
145                    $flags['date'] = 0;
146                    break;
147                case 'indent':
148                    $flags['indent'] = 1;
149                    break;
150                case 'noindent':
151                    $flags['indent'] = 0;
152                    break;
153                case 'linkonly':
154                    $flags['linkonly'] = 1;
155                    break;
156                case 'nolinkonly':
157                case 'include_content':
158                    $flags['linkonly'] = 0;
159                    break;
160                case 'inline':
161                    $flags['inline'] = 1;
162                    break;
163                case 'title':
164                    $flags['title'] = 1;
165                    break;
166                case 'pageexists':
167                    $flags['pageexists'] = 1;
168                    break;
169                case 'existlink':
170                    $flags['pageexists'] = 1;
171                    $flags['linkonly'] = 1;
172                    break;
173                case 'noparlink':
174                    $flags['parlink'] = 0;
175                    break;
176                case 'depth':
177                    $flags['depth'] = $value;
178                    break;
179            }
180        }
181        // the include_content URL parameter overrides flags
182        if (isset($_REQUEST['include_content']))
183            $flags['linkonly'] = 0;
184        return $flags;
185    }
186
187    /**
188     * Returns the converted instructions of a give page/section
189     *
190     * @author Michael Klier <chi@chimeric.de>
191     * @author Michael Hamann <michael@content-space.de>
192     */
193    function _get_instructions($page, $sect, $mode, $lvl, $flags, $root_id = null) {
194        $key = ($sect) ? $page . '#' . $sect : $page;
195        $this->includes[$key] = true; // legacy code for keeping compatibility with other plugins
196
197        // keep compatibility with other plugins that don't know the $root_id parameter
198        if (is_null($root_id)) {
199            global $ID;
200            $root_id = $ID;
201        }
202
203        if ($flags['linkonly']) {
204            if (page_exists($page) || $flags['pageexists']  == 0) {
205                $title = '';
206                if ($flags['title'])
207                    $title = p_get_first_heading($page);
208                if($flags['parlink']) {
209                    $ins = array(
210                        array('p_open', array()),
211                        array('internallink', array(':'.$key, $title)),
212                        array('p_close', array()),
213                    );
214                } else {
215                    $ins = array(array('internallink', array(':'.$key,$title)));
216                }
217            }else {
218                $ins = array();
219            }
220        } else {
221            if (page_exists($page)) {
222                global $ID;
223                $backupID = $ID;
224                $ID = $page; // Change the global $ID as otherwise plugins like the discussion plugin will save data for the wrong page
225                $ins = p_cached_instructions(wikiFN($page));
226                $ID = $backupID;
227            } else {
228                $ins = array();
229            }
230
231            $this->_convert_instructions($ins, $lvl, $page, $sect, $flags, $root_id);
232        }
233        return $ins;
234    }
235
236    /**
237     * Converts instructions of the included page
238     *
239     * The funcion iterates over the given list of instructions and generates
240     * an index of header and section indicies. It also removes document
241     * start/end instructions, converts links, and removes unwanted
242     * instructions like tags, comments, linkbacks.
243     *
244     * Later all header/section levels are convertet to match the current
245     * inclusion level.
246     *
247     * @author Michael Klier <chi@chimeric.de>
248     */
249    function _convert_instructions(&$ins, $lvl, $page, $sect, $flags, $root_id) {
250        global $conf;
251
252        // filter instructions if needed
253        if(!empty($sect)) {
254            $this->_get_section($ins, $sect);   // section required
255        }
256
257        if($flags['firstsec']) {
258            $this->_get_firstsec($ins, $page);  // only first section
259        }
260
261        $ns  = getNS($page);
262        $num = count($ins);
263
264        $conv_idx = array(); // conversion index
265        $lvl_max  = false;   // max level
266        $first_header = -1;
267        $no_header  = false;
268        $sect_title = false;
269        $endpos     = null; // end position of the raw wiki text
270
271        for($i=0; $i<$num; $i++) {
272            switch($ins[$i][0]) {
273                case 'document_start':
274                case 'document_end':
275                case 'section_edit':
276                    unset($ins[$i]);
277                    break;
278                case 'header':
279                    // get section title of first section
280                    if($sect && !$sect_title) {
281                        $sect_title = $ins[$i][1][0];
282                    }
283                    // check if we need to skip the first header
284                    if((!$no_header) && $flags['noheader']) {
285                        $no_header = true;
286                    }
287
288                    $conv_idx[] = $i;
289                    // get index of first header
290                    if($first_header == -1) $first_header = $i;
291                    // get max level of this instructions set
292                    if(!$lvl_max || ($ins[$i][1][1] < $lvl_max)) {
293                        $lvl_max = $ins[$i][1][1];
294                    }
295                    break;
296                case 'section_open':
297                    if ($flags['inline'])
298                        unset($ins[$i]);
299                    else
300                        $conv_idx[] = $i;
301                    break;
302                case 'section_close':
303                    if ($flags['inline'])
304                        unset($ins[$i]);
305                    break;
306                case 'internallink':
307                case 'internalmedia':
308                    // make sure parameters aren't touched
309                    $link_params = '';
310                    $link_id = $ins[$i][1][0];
311                    $link_parts = explode('?', $link_id, 2);
312                    if (count($link_parts) === 2) {
313                        $link_id = $link_parts[0];
314                        $link_params = $link_parts[1];
315                    }
316                    // resolve the id without cleaning it
317                    $link_id = resolve_id($ns, $link_id, false);
318                    // this id is internal (i.e. absolute) now, add ':' to make resolve_id work again
319                    if ($link_id{0} != ':') $link_id = ':'.$link_id;
320                    // restore parameters
321                    $ins[$i][1][0] = ($link_params != '') ? $link_id.'?'.$link_params : $link_id;
322                    break;
323                case 'plugin':
324                    // FIXME skip other plugins?
325                    switch($ins[$i][1][0]) {
326                        case 'tag_tag':                 // skip tags
327                        case 'discussion_comments':     // skip comments
328                        case 'linkback':                // skip linkbacks
329                        case 'data_entry':              // skip data plugin
330                        case 'meta':                    // skip meta plugin
331                            unset($ins[$i]);
332                            break;
333                        // adapt indentation level of nested includes
334                        case 'include_include':
335                            if (!$flags['inline'] && $flags['indent'])
336                                $ins[$i][1][1][4] += $lvl;
337                            break;
338                        /*
339                         * if there is already a closelastsecedit instruction (was added by one of the section
340                         * functions), store its position but delete it as it can't be determined yet if it is needed,
341                         * i.e. if there is a header which generates a section edit (depends on the levels, level
342                         * adjustments, $no_header, ...)
343                         */
344                        case 'include_closelastsecedit':
345                            $endpos = $ins[$i][1][1][0];
346                            unset($ins[$i]);
347                            break;
348                    }
349                    break;
350                default:
351                    break;
352            }
353        }
354
355        // calculate difference between header/section level and include level
356        $diff = 0;
357        if (!isset($lvl_max)) $lvl_max = 0; // if no level found in target, set to 0
358        $diff = $lvl - $lvl_max + 1;
359        if ($no_header) $diff -= 1;  // push up one level if "noheader"
360
361        // convert headers and set footer/permalink
362        $hdr_deleted      = false;
363        $has_permalink    = false;
364        $footer_lvl       = false;
365        $contains_secedit = false;
366        $section_close_at = false;
367        foreach($conv_idx as $idx) {
368            if($ins[$idx][0] == 'header') {
369                if ($section_close_at === false) {
370                    // store the index of the first heading (the begin of the first section)
371                    $section_close_at = $idx;
372                }
373
374                if($no_header && !$hdr_deleted) {
375                    unset ($ins[$idx]);
376                    $hdr_deleted = true;
377                    continue;
378                }
379
380                if($flags['indent']) {
381                    $lvl_new = (($ins[$idx][1][1] + $diff) > 5) ? 5 : ($ins[$idx][1][1] + $diff);
382                    $ins[$idx][1][1] = $lvl_new;
383                }
384
385                if($ins[$idx][1][1] <= $conf['maxseclevel'])
386                    $contains_secedit = true;
387
388                // set permalink
389                if($flags['link'] && !$has_permalink && ($idx == $first_header)) {
390                    $this->_permalink($ins[$idx], $page, $sect, $flags);
391                    $has_permalink = true;
392                }
393
394                // set footer level
395                if(!$footer_lvl && ($idx == $first_header) && !$no_header) {
396                    if($flags['indent']) {
397                        $footer_lvl = $lvl_new;
398                    } else {
399                        $footer_lvl = $lvl_max;
400                    }
401                }
402            } else {
403                // it's a section
404                if($flags['indent']) {
405                    $lvl_new = (($ins[$idx][1][0] + $diff) > 5) ? 5 : ($ins[$idx][1][0] + $diff);
406                    $ins[$idx][1][0] = $lvl_new;
407                }
408
409                // check if noheader is used and set the footer level to the first section
410                if($no_header && !$footer_lvl) {
411                    if($flags['indent']) {
412                        $footer_lvl = $lvl_new;
413                    } else {
414                        $footer_lvl = $lvl_max;
415                    }
416                }
417            }
418        }
419
420        // close last open section of the included page if there is any
421        if ($contains_secedit) {
422            array_push($ins, array('plugin', array('include_closelastsecedit', array($endpos))));
423        }
424
425        // add edit button
426        if($flags['editbtn']) {
427            $this->_editbtn($ins, $page, $sect, $sect_title, ($flags['redirect'] ? $root_id : false));
428        }
429
430        // add footer
431        if($flags['footer']) {
432            $ins[] = $this->_footer($page, $sect, $sect_title, $flags, $footer_lvl, $root_id);
433        }
434
435        // wrap content at the beginning of the include that is not in a section in a section
436        if ($lvl > 0 && $section_close_at !== 0 && $flags['indent'] && !$flags['inline']) {
437            if ($section_close_at === false) {
438                $ins[] = array('section_close', array());
439                array_unshift($ins, array('section_open', array($lvl)));
440            } else {
441                $section_close_idx = array_search($section_close_at, array_keys($ins));
442                if ($section_close_idx > 0) {
443                    $before_ins = array_slice($ins, 0, $section_close_idx);
444                    $after_ins = array_slice($ins, $section_close_idx);
445                    $ins = array_merge($before_ins, array(array('section_close', array())), $after_ins);
446                    array_unshift($ins, array('section_open', array($lvl)));
447                }
448            }
449        }
450
451        // add instructions entry wrapper
452        array_unshift($ins, array('plugin', array('include_wrap', array('open', $page, $flags['redirect']))));
453        array_push($ins, array('plugin', array('include_wrap', array('close'))));
454
455        // close previous section if any and re-open after inclusion
456        if($lvl != 0 && $this->sec_close && !$flags['inline']) {
457            array_unshift($ins, array('section_close', array()));
458            $ins[] = array('section_open', array($lvl));
459        }
460    }
461
462    /**
463     * Appends instruction item for the include plugin footer
464     *
465     * @author Michael Klier <chi@chimeric.de>
466     */
467    function _footer($page, $sect, $sect_title, $flags, $footer_lvl, $root_id) {
468        $footer = array();
469        $footer[0] = 'plugin';
470        $footer[1] = array('include_footer', array($page, $sect, $sect_title, $flags, $root_id, $footer_lvl));
471        return $footer;
472    }
473
474    /**
475     * Appends instruction item for an edit button
476     *
477     * @author Michael Klier <chi@chimeric.de>
478     */
479    function _editbtn(&$ins, $page, $sect, $sect_title, $root_id) {
480        $title = ($sect) ? $sect_title : $page;
481        $editbtn = array();
482        $editbtn[0] = 'plugin';
483        $editbtn[1] = array('include_editbtn', array($title));
484        $ins[] = $editbtn;
485    }
486
487    /**
488     * Convert instruction item for a permalink header
489     *
490     * @author Michael Klier <chi@chimeric.de>
491     */
492    function _permalink(&$ins, $page, $sect, $flags) {
493        $ins[0] = 'plugin';
494        $ins[1] = array('include_header', array($ins[1][0], $ins[1][1], $ins[1][2], $page, $sect, $flags));
495    }
496
497    /**
498     * Get a section including its subsections
499     *
500     * @author Michael Klier <chi@chimeric.de>
501     */
502    function _get_section(&$ins, $sect) {
503        $num = count($ins);
504        $offset = false;
505        $lvl    = false;
506        $end    = false;
507        $endpos = null; // end position in the input text, needed for section edit buttons
508
509        $check = array(); // used for sectionID() in order to get the same ids as the xhtml renderer
510
511        for($i=0; $i<$num; $i++) {
512            if ($ins[$i][0] == 'header') {
513
514                // found the right header
515                if (sectionID($ins[$i][1][0], $check) == $sect) {
516                    $offset = $i;
517                    $lvl    = $ins[$i][1][1];
518                } elseif ($offset && $lvl && ($ins[$i][1][1] <= $lvl)) {
519                    $end = $i - $offset;
520                    $endpos = $ins[$i][1][2]; // the position directly after the found section, needed for the section edit button
521                    break;
522                }
523            }
524        }
525        $offset = $offset ? $offset : 0;
526        $end = $end ? $end : ($num - 1);
527        if(is_array($ins)) {
528            $ins = array_slice($ins, $offset, $end);
529            // store the end position in the include_closelastsecedit instruction so it can generate a matching button
530            $ins[] = array('plugin', array('include_closelastsecedit', array($endpos)));
531        }
532    }
533
534    /**
535     * Only display the first section of a page and a readmore link
536     *
537     * @author Michael Klier <chi@chimeric.de>
538     */
539    function _get_firstsec(&$ins, $page) {
540        $num = count($ins);
541        $first_sect = false;
542        $endpos = null; // end position in the input text
543        for($i=0; $i<$num; $i++) {
544            if($ins[$i][0] == 'section_close') {
545                $first_sect = $i;
546            }
547            if ($ins[$i][0] == 'header') {
548                /*
549                 * Store the position of the last header that is encountered. As section_close/open-instruction are
550                 * always (unless some plugin modifies this) around a header instruction this means that the last
551                 * position that is stored here is exactly the position of the section_close/open at which the content
552                 * is truncated.
553                 */
554                $endpos = $ins[$i][1][2];
555            }
556            // only truncate the content and add the read more link when there is really
557            // more than that first section
558            if(($first_sect) && ($ins[$i][0] == 'section_open')) {
559                $ins = array_slice($ins, 0, $first_sect);
560                $ins[] = array('plugin', array('include_readmore', array($page)));
561                $ins[] = array('section_close', array());
562                // store the end position in the include_closelastsecedit instruction so it can generate a matching button
563                $ins[] = array('plugin', array('include_closelastsecedit', array($endpos)));
564                return;
565            }
566        }
567    }
568
569    /**
570     * Gives a list of pages for a given include statement
571     *
572     * @author Michael Hamann <michael@content-space.de>
573     */
574    function _get_included_pages($mode, $page, $sect, $parent_id, $flags) {
575        global $conf;
576        $pages = array();
577        switch($mode) {
578        case 'namespace':
579            $ns    = str_replace(':', '/', cleanID($page));
580            search($pagearrays, $conf['datadir'], 'search_allpages', array('depth' => $flags['depth']), $ns);
581            if (is_array($pagearrays)) {
582                foreach ($pagearrays as $pagearray) {
583                    $pages[] = $pagearray['id'];
584                }
585            }
586            break;
587        case 'tagtopic':
588            if (!$this->taghelper)
589                $this->taghelper =& plugin_load('helper', 'tag');
590            if(!$this->taghelper) {
591                msg('You have to install the tag plugin to use this functionality!', -1);
592                return array();
593            }
594            $tag   = $page;
595            $sect  = '';
596            $pagearrays = $this->taghelper->getTopic('', null, $tag);
597            foreach ($pagearrays as $pagearray) {
598                $pages[] = $pagearray['id'];
599            }
600            break;
601        default:
602            $page = $this->_apply_macro($page);
603            resolve_pageid(getNS($parent_id), $page, $exists); // resolve shortcuts and clean ID
604            if (auth_quickaclcheck($page) >= AUTH_READ)
605                $pages[] = $page;
606        }
607
608        sort($pages);
609
610        $result = array();
611        foreach ($pages as $page) {
612            $exists = page_exists($page);
613            $result[] = array('id' => $page, 'exists' => $exists, 'parent_id' => $parent_id);
614        }
615        return $result;
616    }
617
618    /**
619     * This function generates the list of all included pages from a list of metadata
620     * instructions.
621     */
622    function _get_included_pages_from_meta_instructions($instructions) {
623        $pages = array();
624        foreach ($instructions as $instruction) {
625            $mode      = $instruction['mode'];
626            $page      = $instruction['page'];
627            $sect      = $instruction['sect'];
628            $parent_id = $instruction['parent_id'];
629            $flags     = $instruction['flags'];
630            $pages = array_merge($pages, $this->_get_included_pages($mode, $page, $sect, $parent_id, $flags));
631        }
632        return $pages;
633    }
634
635    /**
636     * Makes user or date dependent includes possible
637     */
638    function _apply_macro($id) {
639        global $INFO;
640        global $auth;
641
642        // if we don't have an auth object, do nothing
643        if (!$auth) return $id;
644
645        $user     = $_SERVER['REMOTE_USER'];
646        $group    = $INFO['userinfo']['grps'][0];
647
648        $time_stamp = time();
649        if(preg_match('/@DATE(\w+)@/',$id,$matches)) {
650            switch($matches[1]) {
651            case 'PMONTH':
652                $time_stamp = strtotime("-1 month");
653                break;
654            case 'NMONTH':
655                $time_stamp = strtotime("+1 month");
656                break;
657            case 'NWEEK':
658                $time_stamp = strtotime("+1 week");
659                break;
660            case 'PWEEK':
661                $time_stamp = strtotime("-1 week");
662                break;
663            case 'TOMORROW':
664                $time_stamp = strtotime("+1 day");
665                break;
666            case 'YESTERDAY':
667                $time_stamp = strtotime("-1 day");
668                break;
669            case 'NYEAR':
670                $time_stamp = strtotime("+1 year");
671                break;
672            case 'PYEAR':
673                $time_stamp = strtotime("-1 year");
674                break;
675            }
676            $id = preg_replace('/@DATE(\w+)@/','', $id);
677        }
678
679        $replace = array(
680                '@USER@'  => cleanID($user),
681                '@NAME@'  => cleanID($INFO['userinfo']['name']),
682                '@GROUP@' => cleanID($group),
683                '@YEAR@'  => date('Y',$time_stamp),
684                '@MONTH@' => date('m',$time_stamp),
685                '@WEEK@' => date('W',$time_stamp),
686                '@DAY@'   => date('d',$time_stamp),
687                '@YEARPMONTH@' => date('Ym',strtotime("-1 month")),
688                '@PMONTH@' => date('m',strtotime("-1 month")),
689                '@NMONTH@' => date('m',strtotime("+1 month")),
690                '@YEARNMONTH@' => date('Ym',strtotime("+1 month")),
691                '@YEARPWEEK@' => date('YW',strtotime("-1 week")),
692                '@PWEEK@' => date('W',strtotime("-1 week")),
693                '@NWEEK@' => date('W',strtotime("+1 week")),
694                '@YEARNWEEK@' => date('YW',strtotime("+1 week")),
695                );
696        return str_replace(array_keys($replace), array_values($replace), $id);
697    }
698}
699// vim:ts=4:sw=4:et:
700