aboutsummaryrefslogtreecommitdiffstats
path: root/Zotlabs/Lib/NativeWikiPage.php
diff options
context:
space:
mode:
authorzotlabs <mike@macgirvin.com>2017-01-17 23:39:28 -0800
committerzotlabs <mike@macgirvin.com>2017-01-17 23:39:28 -0800
commit7f944515dedd5c7a7d36fe5ed3b6bd884eb9be40 (patch)
tree86bf4b5ded23337a1b508fadd55cbf395384ce85 /Zotlabs/Lib/NativeWikiPage.php
parentb6595a44d1f6db38c104abaa3c24f42223316ec5 (diff)
downloadvolse-hubzilla-7f944515dedd5c7a7d36fe5ed3b6bd884eb9be40.tar.gz
volse-hubzilla-7f944515dedd5c7a7d36fe5ed3b6bd884eb9be40.tar.bz2
volse-hubzilla-7f944515dedd5c7a7d36fe5ed3b6bd884eb9be40.zip
more work on native wiki - revert now works; still remaining: diff, delete-page, rename-page and export wiki.
Diffstat (limited to 'Zotlabs/Lib/NativeWikiPage.php')
-rw-r--r--Zotlabs/Lib/NativeWikiPage.php621
1 files changed, 621 insertions, 0 deletions
diff --git a/Zotlabs/Lib/NativeWikiPage.php b/Zotlabs/Lib/NativeWikiPage.php
new file mode 100644
index 000000000..c78661654
--- /dev/null
+++ b/Zotlabs/Lib/NativeWikiPage.php
@@ -0,0 +1,621 @@
+<?php
+
+namespace Zotlabs\Lib;
+
+use \Zotlabs\Lib as Zlib;
+
+class NativeWikiPage {
+
+ static public function page_list($channel_id,$observer_hash, $resource_id) {
+
+ // TODO: Create item table records for pages so that metadata like title can be applied
+ $w = Zlib\NativeWiki::get_wiki($channel_id,$observer_hash,$resource_id);
+
+ $pages[] = [
+ 'resource_id' => '',
+ 'title' => 'Home',
+ 'url' => 'Home',
+ 'link_id' => 'id_wiki_home_0'
+ ];
+
+ $sql_extra = item_permissions_sql($channel_id,$observer_hash);
+
+ $r = q("select * from item where resource_type = 'nwikipage' and resource_id = '%s' and uid = %d $sql_extra group by mid",
+ dbesc($resource_id),
+ intval($channel_id)
+ );
+ if($r) {
+ $items = fetch_post_tags($r,true);
+ foreach($items as $page_item) {
+ $title = get_iconfig($page_item['id'],'nwikipage','pagetitle',t('(No Title)'));
+ if(urldecode($title) !== 'Home') {
+ $pages[] = [
+ 'resource_id' => $resource_id,
+ 'title' => urldecode($title),
+ 'url' => $title,
+ 'link_id' => 'id_' . substr($resource_id, 0, 10) . '_' . $page_item['id']
+ ];
+ }
+ }
+ }
+
+ return array('pages' => $pages, 'wiki' => $w);
+ }
+
+
+ static public function create_page($channel_id, $observer_hash, $name, $resource_id) {
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+
+ // create an empty activity
+
+ $arr = [];
+ $arr['uid'] = $channel_id;
+ $arr['author_xchan'] = $observer_hash;
+ $arr['resource_type'] = 'nwikipage';
+ $arr['resource_id'] = $resource_id;
+
+ set_iconfig($arr,'nwikipage','pagetitle',urlencode(($name) ? $name : t('(No Title)')),true);
+
+ post_activity_item($arr, false, false);
+
+ $page = [
+ 'rawName' => $name,
+ 'htmlName' => escape_tags($name),
+ 'urlName' => urlencode(escape_tags($name)),
+ 'fileName' => urlencode(escape_tags($name)) . Zlib\NativeWikiPage::get_file_ext($w)
+ ];
+
+ return array('page' => $page, 'wiki' => $w, 'message' => '', 'success' => true);
+ }
+
+ static public function rename_page($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $pageNewName = ((array_key_exists('pageNewName',$arr)) ? $arr['pageNewName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if(! $w['path']) {
+ return array('message' => t('Wiki not found.'), 'success' => false);
+ }
+
+ $page_path_old = $w['path'] . '/' . $pageUrlName . \Zlib\NativeWikiPage::get_file_ext($w);
+
+ if(! is_readable($page_path_old) === true) {
+ return array('message' => 'Cannot read wiki page: ' . $page_path_old, 'success' => false);
+ }
+
+ $page = [
+ 'rawName' => $pageNewName,
+ 'htmlName' => escape_tags($pageNewName),
+ 'urlName' => urlencode(escape_tags($pageNewName)),
+ 'fileName' => urlencode(escape_tags($pageNewName)) . \Zlib\NativeWikiPage::get_file_ext($w)
+ ];
+
+ $page_path_new = $w['path'] . '/' . $page['fileName'] ;
+
+ if(is_file($page_path_new)) {
+ return array('message' => 'Page already exists.', 'success' => false);
+ }
+
+ // Rename the page file in the wiki repo
+ if(! rename($page_path_old, $page_path_new)) {
+ return array('message' => 'Error renaming page file.', 'success' => false);
+ }
+ else {
+ return array('page' => $page, 'message' => '', 'success' => true);
+ }
+
+ }
+
+ static public function get_page_content($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? intval($arr['channel_id']) : 0);
+ $revision = ((array_key_exists('revision',$arr)) ? intval($arr['revision']) : (-1));
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if (! $w['wiki']) {
+ return array('content' => null, 'message' => 'Error reading wiki', 'success' => false);
+ }
+
+ $item = self::load_page($arr);
+
+ if($item) {
+ $content = $item['body'];
+
+ return [
+ 'content' => json_encode($content),
+ 'mimeType' => $w['mimeType'],
+ 'message' => '',
+ 'success' => true
+ ];
+ }
+
+ return array('content' => null, 'message' => t('Error reading page content'), 'success' => false);
+
+ }
+
+ static public function page_history($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if (!$w['wiki']) {
+ return array('history' => null, 'message' => 'Error reading wiki', 'success' => false);
+ }
+
+ $items = self::load_page_history($arr);
+
+ $history = [];
+
+ if($items) {
+ $processed = 0;
+ foreach($items as $item) {
+ if($processed > 1000)
+ break;
+ $processed ++;
+ $history[] = [
+ 'revision' => $item['revision'],
+ 'date' => datetime_convert('UTC',date_default_timezone_get(),$item['created']),
+ 'name' => $item['author']['xchan_name'],
+ 'title' => get_iconfig($item,'nwikipage','commit_msg')
+ ];
+
+ }
+
+ return [ 'success' => true, 'history' => $history ];
+ }
+
+ return [ 'success' => false ];
+
+ }
+
+
+ static public function load_page($arr) {
+logger('arr: ' . print_r($arr,true));
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+ $revision = ((array_key_exists('revision',$arr)) ? $arr['revision'] : (-1));
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if (! $w['wiki']) {
+ return array('content' => null, 'message' => 'Error reading wiki', 'success' => false);
+ }
+
+ $ids = '';
+dbg(0);
+ $ic = q("select * from iconfig left join item on iconfig.iid = item.id where uid = %d and cat = 'nwikipage' and k = 'pagetitle' and v = '%s'",
+ intval($channel_id),
+ dbesc($pageUrlName)
+ );
+
+ if($ic) {
+ foreach($ic as $c) {
+ if($ids)
+ $ids .= ',';
+ $ids .= intval($c['iid']);
+ }
+ }
+
+ $sql_extra = item_permissions_sql($channel_id,$observer_hash);
+ if($revision == (-1))
+ $sql_extra .= " order by revision desc ";
+ elseif($revision)
+ $sql_extra .= " and revision = " . intval($revision) . " ";
+
+ $r = null;
+ if($ids) {
+ $r = q("select * from item where resource_type = 'nwikipage' and resource_id = '%s' and uid = %d and id in ( $ids ) $sql_extra limit 1",
+ dbesc($resource_id),
+ intval($channel_id)
+ );
+dbg(0);
+ if($r) {
+ $items = fetch_post_tags($r,true);
+ return $items[0];
+ }
+ }
+dbg(0);
+ return null;
+ }
+
+ static public function load_page_history($arr) {
+
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+ $revision = ((array_key_exists('revision',$arr)) ? $arr['revision'] : (-1));
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if (! $w['wiki']) {
+ return array('content' => null, 'message' => 'Error reading wiki', 'success' => false);
+ }
+
+ $ids = '';
+
+ $ic = q("select * from iconfig left join item on iconfig.iid = item.id where uid = %d and cat = 'nwikipage' and k = 'pagetitle' and v = '%s'",
+ intval($channel_id),
+ dbesc($pageUrlName)
+ );
+
+ if($ic) {
+ foreach($ic as $c) {
+ if($ids)
+ $ids .= ',';
+ $ids .= intval($c['iid']);
+ }
+ }
+
+ $sql_extra = item_permissions_sql($channel_id,$observer_hash);
+ $sql_extra .= " order by revision desc ";
+
+ $r = null;
+ if($ids) {
+ $r = q("select * from item where resource_type = 'nwikipage' and resource_id = '%s' and uid = %d and id in ( $ids ) $sql_extra",
+ dbesc($resource_id),
+ intval($channel_id)
+ );
+ if($r) {
+ xchan_query($r);
+ $items = fetch_post_tags($r,true);
+ return $items;
+ }
+ }
+
+ return null;
+ }
+
+
+
+ static public function prepare_content($s) {
+
+ $text = preg_replace_callback('{
+ (?:\n\n|\A\n?)
+ ( # $1 = the code block -- one or more lines, starting with a space/tab
+ (?>
+ [ ]{'.'4'.'} # Lines must start with a tab or a tab-width of spaces
+ .*\n+
+ )+
+ )
+ ((?=^[ ]{0,'.'4'.'}\S)|\Z) # Lookahead for non-space at line-start, or end of doc
+ }xm',
+ 'self::nwiki_prepare_content_callback', $s);
+
+ return $text;
+ }
+
+ static public function nwiki_prepare_content_callback($matches) {
+ $codeblock = $matches[1];
+
+ $codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES, UTF8, false);
+ return "\n\n" . $codeblock ;
+ }
+
+
+
+ static public function save_page($arr) {
+
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $content = ((array_key_exists('content',$arr)) ? purify_html(Zlib\NativeWikiPage::prepare_content($arr['content'])) : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+ $revision = ((array_key_exists('revision',$arr)) ? $arr['revision'] : 0);
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+
+ if (!$w['wiki']) {
+ return array('message' => t('Error reading wiki'), 'success' => false);
+ }
+
+ $item = self::load_page($arr);
+ if(! $item) {
+ return array('message' => t('Page not found'), 'success' => false);
+ }
+ unset($item['id']);
+ unset($item['author']);
+
+ $item['parent'] = 0;
+ $item['body'] = $content;
+ $item['author_xchan'] = $observer_hash;
+ $item['revision'] = (($arr['revision']) ? intval($arr['revision']) + 1 : intval($item['revision']) + 1);
+
+ if($item['iconfig'] && is_array($item['iconfig']) && count($item['iconfig'])) {
+ for($x = 0; $x < count($item['iconfig']); $x ++) {
+ unset($item['iconfig'][$x]['id']);
+ unset($item['iconfig'][$x]['iid']);
+ }
+ }
+
+ $ret = item_store($item, false, false);
+
+ if($ret['item_id'])
+ return array('message' => '', 'filename' => $filename, 'success' => true);
+ else
+ return array('message' => t('Page update failed.'), 'success' => false);
+ }
+
+ static public function delete_page($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+
+ if (!$w['path']) {
+ return array('message' => t('Error reading wiki'), 'success' => false);
+ }
+ $page_path = $w['path'] . '/' . $pageUrlName . wiki_get_file_ext($w);
+ if (is_writable($page_path) === true) {
+ if(!unlink($page_path)) {
+ return array('message' => t('Error deleting page file'), 'success' => false);
+ }
+ return array('message' => '', 'success' => true);
+ }
+ else {
+ return array('message' => t('Page file not writable'), 'success' => false);
+ }
+ }
+
+ static public function revert_page($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $commitHash = ((array_key_exists('commitHash',$arr)) ? $arr['commitHash'] : null);
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+
+ if (! $commitHash) {
+ return array('content' => $content, 'message' => 'No commit was provided', 'success' => false);
+ }
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+ if (!$w['wiki']) {
+ return array('content' => $content, 'message' => 'Error reading wiki', 'success' => false);
+ }
+
+ $x = $arr;
+
+ if(intval($commitHash) > 0) {
+ unset($x['commitHash']);
+ $x['revision'] = intval($commitHash) - 1;
+ $loaded = self::load_page($x);
+
+ if($loaded) {
+ $content = $loaded['body'];
+ return [ 'content' => $content, 'success' => true ];
+ }
+ return [ 'content' => $content, 'success' => false ];
+ }
+ }
+
+ static public function compare_page($arr) {
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : '');
+ $resource_id = ((array_key_exists('resource_id',$arr)) ? $arr['resource_id'] : '');
+ $currentCommit = ((array_key_exists('currentCommit',$arr)) ? $arr['currentCommit'] : 'HEAD');
+ $compareCommit = ((array_key_exists('compareCommit',$arr)) ? $arr['compareCommit'] : null);
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+
+ if (! $compareCommit) {
+ return array('message' => t('No compare commit was provided'), 'success' => false);
+ }
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+
+ if (!$w['path']) {
+ return array('message' => t('Error reading wiki'), 'success' => false);
+ }
+ $page_path = $w['path'] . '/' . $pageUrlName . \Zlib\NativeWikiPage::get_file_ext($w);
+ if (is_readable($page_path) === true) {
+ $reponame = ((array_key_exists('title', $w['wiki'])) ? urlencode($w['wiki']['title']) : 'repo');
+ if($reponame === '') {
+ $reponame = 'repo';
+ }
+ $git = new GitRepo('', null, false, $w['wiki']['title'], $w['path']);
+ $compareContent = $currentContent = '';
+ try {
+ foreach ($git->git->tree($currentCommit) as $object) {
+ if ($object['type'] == 'blob' && $object['file'] === $pageUrlName . wiki_get_file_ext($w)) {
+ $currentContent = $git->git->cat->blob($object['hash']);
+ }
+ }
+ foreach ($git->git->tree($compareCommit) as $object) {
+ if ($object['type'] == 'blob' && $object['file'] === $pageUrlName . wiki_get_file_ext($w)) {
+ $compareContent = $git->git->cat->blob($object['hash']);
+ }
+ }
+ require_once('library/class.Diff.php');
+ $diff = Diff::toTable(Diff::compare($currentContent, $compareContent));
+ }
+ catch (\PHPGit\Exception\GitException $e) {
+ return array('message' => t('GitRepo error thrown'), 'success' => false);
+ }
+ return array('diff' => $diff, 'message' => '', 'success' => true);
+ }
+ else {
+ return array('message' => t('Page file not writable'), 'success' => false);
+ }
+ }
+
+ static public function commit($arr) {
+logger('committing');
+ $commit_msg = ((array_key_exists('commit_msg', $arr)) ? $arr['commit_msg'] : t('Page updated'));
+ $observer_hash = ((array_key_exists('observer_hash',$arr)) ? $arr['observer_hash'] : '');
+ $channel_id = ((array_key_exists('channel_id',$arr)) ? $arr['channel_id'] : 0);
+ $pageUrlName = ((array_key_exists('pageUrlName',$arr)) ? $arr['pageUrlName'] : t('Untitled'));
+
+ if(array_key_exists('resource_id', $arr)) {
+ $resource_id = $arr['resource_id'];
+ }
+ else {
+ return array('message' => t('Wiki resource_id required for git commit'), 'success' => false);
+ }
+
+ $w = Zlib\NativeWiki::get_wiki($channel_id, $observer_hash, $resource_id);
+
+ if (! $w['wiki']) {
+ return array('message' => t('Error reading wiki'), 'success' => false);
+ }
+
+ $page = self::load_page($arr);
+logger('commit: page: ' . print_r($page,true));
+ if($page) {
+ set_iconfig($page['id'],'nwikipage','commit_msg',escape_tags($commit_msg),true);
+ return [ 'success' => true, 'page' => $page ];
+ }
+
+ return [ 'success' => false, 'message' => t('Page not found.') ];
+
+ }
+
+ static public function convert_links($s, $wikiURL) {
+
+ if (strpos($s,'[[') !== false) {
+ preg_match_all("/\[\[(.*?)\]\]/", $s, $match);
+ $pages = $pageURLs = array();
+ foreach ($match[1] as $m) {
+ // TODO: Why do we need to double urlencode for this to work?
+ $pageURLs[] = urlencode(urlencode(escape_tags($m)));
+ $pages[] = $m;
+ }
+ $idx = 0;
+ while(strpos($s,'[[') !== false) {
+ $replace = '<a href="'.$wikiURL.'/'.$pageURLs[$idx].'">'.$pages[$idx].'</a>';
+ $s = preg_replace("/\[\[(.*?)\]\]/", $replace, $s, 1);
+ $idx++;
+ }
+ }
+ return $s;
+ }
+
+ /**
+ * Replace the instances of the string [toc] with a list element that will be populated by
+ * a table of contents by the JavaScript library
+ * @param string $s
+ * @return string
+ */
+ static public function generate_toc($s) {
+ if (strpos($s,'[toc]') !== false) {
+ //$toc_md = wiki_toc($s); // Generate Markdown-formatted list prior to HTML render
+ $toc_md = '<ul id="wiki-toc"></ul>'; // use the available jQuery plugin http://ndabas.github.io/toc/
+ $s = preg_replace("/\[toc\]/", $toc_md, $s, -1);
+ }
+ return $s;
+ }
+
+ /**
+ * Converts a select set of bbcode tags. Much of the code is copied from include/bbcode.php
+ * @param string $s
+ * @return string
+ */
+ static public function bbcode($s) {
+
+ $s = str_replace(array('[baseurl]', '[sitename]'), array(z_root(), get_config('system', 'sitename')), $s);
+
+ $observer = App::get_observer();
+ if ($observer) {
+ $s1 = '<span class="bb_observer" title="' . t('Different viewers will see this text differently') . '">';
+ $s2 = '</span>';
+ $obsBaseURL = $observer['xchan_connurl'];
+ $obsBaseURL = preg_replace("/\/poco\/.*$/", '', $obsBaseURL);
+ $s = str_replace('[observer.baseurl]', $obsBaseURL, $s);
+ $s = str_replace('[observer.url]', $observer['xchan_url'], $s);
+ $s = str_replace('[observer.name]', $s1 . $observer['xchan_name'] . $s2, $s);
+ $s = str_replace('[observer.address]', $s1 . $observer['xchan_addr'] . $s2, $s);
+ $s = str_replace('[observer.webname]', substr($observer['xchan_addr'], 0, strpos($observer['xchan_addr'], '@')), $s);
+ $s = str_replace('[observer.photo]', '', $s);
+ } else {
+ $s = str_replace('[observer.baseurl]', '', $s);
+ $s = str_replace('[observer.url]', '', $s);
+ $s = str_replace('[observer.name]', '', $s);
+ $s = str_replace('[observer.address]', '', $s);
+ $s = str_replace('[observer.webname]', '', $s);
+ $s = str_replace('[observer.photo]', '', $s);
+ }
+
+ return $s;
+ }
+
+ static public function get_file_ext($arr) {
+ if($arr['mimeType'] == 'text/bbcode')
+ return '.bb';
+ else
+ return '.md';
+ }
+
+ // This function is derived from
+ // http://stackoverflow.com/questions/32068537/generate-table-of-contents-from-markdown-in-php
+ static public function toc($content) {
+ // ensure using only "\n" as line-break
+ $source = str_replace(["\r\n", "\r"], "\n", $content);
+
+ // look for markdown TOC items
+ preg_match_all(
+ '/^(?:=|-|#).*$/m',
+ $source,
+ $matches,
+ PREG_PATTERN_ORDER | PREG_OFFSET_CAPTURE
+ );
+
+ // preprocess: iterate matched lines to create an array of items
+ // where each item is an array(level, text)
+ $file_size = strlen($source);
+ foreach ($matches[0] as $item) {
+ $found_mark = substr($item[0], 0, 1);
+ if ($found_mark == '#') {
+ // text is the found item
+ $item_text = $item[0];
+ $item_level = strrpos($item_text, '#') + 1;
+ $item_text = substr($item_text, $item_level);
+ } else {
+ // text is the previous line (empty if <hr>)
+ $item_offset = $item[1];
+ $prev_line_offset = strrpos($source, "\n", -($file_size - $item_offset + 2));
+ $item_text =
+ substr($source, $prev_line_offset, $item_offset - $prev_line_offset - 1);
+ $item_text = trim($item_text);
+ $item_level = $found_mark == '=' ? 1 : 2;
+ }
+ if (!trim($item_text) OR strpos($item_text, '|') !== FALSE) {
+ // item is an horizontal separator or a table header, don't mind
+ continue;
+ }
+ $raw_toc[] = ['level' => $item_level, 'text' => trim($item_text)];
+ }
+ $o = '';
+ foreach($raw_toc as $t) {
+ $level = intval($t['level']);
+ $text = $t['text'];
+ switch ($level) {
+ case 1:
+ $li = '* ';
+ break;
+ case 2:
+ $li = ' * ';
+ break;
+ case 3:
+ $li = ' * ';
+ break;
+ case 4:
+ $li = ' * ';
+ break;
+ default:
+ $li = '* ';
+ break;
+ }
+ $o .= $li . $text . "\n";
+ }
+ return $o;
+ }
+
+} \ No newline at end of file