Enano CMS (1.1.x): comparison includes/template.php

equal deleted inserted replaced

-:7be26f1d1068
+:162763d69256
 else return false;
 }
 /**
 * Fetches the contents of both sidebars.
-* @return array - key 0 is left, key 1 is right
+* @return array - key 0 is left, key 1 is right, key 2 is the HTML that makes up an empty sidebar
 * @example list($left, $right) = $template->fetch_sidebar();
 */
 function fetch_sidebar()
 {
 global $db, $session, $paths, $template, $plugins; // Common objects
-global $cache;
+// first, check the cache
+if ( $result = $this->fetch_cached_sidebar() )
+{
+return $result;
+}
+profiler_log('Started sidebar parsing');
+// init our block contents
 $left = '';
 $right = '';
+$min = '';
-// check the cache
-if ( !$session->user_logged_in && $data = $cache->fetch('anon_sidebar') )
+// also might want the links block
-{
-if ( @$data['_theme_'] === $this->theme )
-{
-unset($data['_theme_']);
-foreach ( $data as &$md )
-{
-$md = str_replace('$USERNAME$', $session->username, $md);
-$md = str_replace('$PAGEID$', $paths->page, $md);
-$md = str_replace('$MAIN_PAGE$', getConfig('main_page'), $md);
-}
-return $data;
-}
-}
 if ( !$this->fetch_block('Links') )
 $this->initLinksWidget();
-$q = $db->sql_query('SELECT item_id,sidebar_id,block_name,block_type,block_content FROM '.table_prefix.'sidebar' . "\n"
+// templates to work with
-. '  WHERE item_enabled=1 ORDER BY sidebar_id ASC, item_order ASC;');
-if(!$q) $db->_die('The sidebar text data could not be selected.');
 $vars = $this->extract_vars('elements.tpl');
-if(isset($vars['sidebar_top']))
+// sidebar_top and sidebar_bottom are HTML that is prepended/appended to sidebar content. Themes can
+// choose whether or not to display a sidebar depending on whether the sidebar is empty ( $left == $min )
+// or not using the sidebar_left and sidebar_right template booleans (the oxygen theme does this).
+if ( isset($vars['sidebar_top']) )
 {
 $top = $this->parse($vars['sidebar_top']);
 $left  .= $top;
 $right .= $top;
-}
+$min .= $top;
+}
-while($row = $db->fetchrow())
-{
+// grab the blocks from the DB
-switch($row['block_type'])
+$q = $db->sql_query('SELECT item_id,sidebar_id,block_name,block_type,block_content FROM '.table_prefix.'sidebar' . "\n"
-{
+. '  WHERE item_enabled=1 ORDER BY sidebar_id ASC, item_order ASC;');
-case BLOCK_WIKIFORMAT:
+if ( !$q )
-default:
+$db->_die('The sidebar text data could not be selected.');
-$parser = $this->makeParserText($vars['sidebar_section']);
-$c = RenderMan::render($row['block_content']);
+// explicitly specify $q in case a plugin or PHP block makes a query
-break;
+while ( $row = $db->fetchrow($q) )
-case BLOCK_TEMPLATEFORMAT:
+{
-$parser = $this->makeParserText($vars['sidebar_section']);
+// format the block
-$c = $this->tplWikiFormat($row['block_content']);
+$block_content = $this->format_sidebar_block($row, $vars, $parser);
-break;
-case BLOCK_HTML:
-$parser = $this->makeParserText($vars['sidebar_section_raw']);
-$c = $row['block_content'];
-break;
-case BLOCK_PHP:
-$parser = $this->makeParserText($vars['sidebar_section_raw']);
-ob_start();
-@eval($row['block_content']);
-$c = ob_get_contents();
-ob_end_clean();
-break;
-case BLOCK_PLUGIN:
-$parser = $this->makeParserText('{CONTENT}');
-$c = '<!-- PLUGIN -->' . (gettype($this->fetch_block($row['block_content'])) == 'string') ?
-$this->fetch_block($row['block_content']) :
-// This used to say "can't find plugin block" but I think it's more friendly to just silently hide it.
-'';
-break;
-}
 // is there a {restrict} or {hideif} block?
-if ( preg_match('/\{(restrict|hideif) ([a-z0-9_\(\)\|&! ]+)\}/', $c, $match) )
+if ( preg_match('/\{(restrict|hideif) ([a-z0-9_\(\)\|&! ]+)\}/', $block_content, $match) )
 {
 // we have one, check the condition
 $type =& $match[1];
 $cond =& $match[2];
 $result = $this->process_condition($cond);
 {
 // throw out this block, it's hidden for whatever reason by the sidebar script
 continue;
 }
 // didn't get a match, so hide the conditional logic
-$c = str_replace_once($match[0], '', $c);
+// FIXME: this needs to be verbose about syntax errors
-}
+$block_content = str_replace_once($match[0], '', $block_content);
+}
-$parser->assign_vars(Array( 'TITLE'=>$this->tplWikiFormat($row['block_name']), 'CONTENT'=>$c ));
-$run = $parser->run();
+// if we made it here, this block definitely needs to be displayed. send it to the
+// parser (set by format_sidebar_block) and decide where to append it (but not in that order ;))
+$appender = false;
+if ( $row['sidebar_id'] == SIDEBAR_LEFT )
+{
+$appender =& $left;
+}
+else if ( $row['sidebar_id'] == SIDEBAR_RIGHT )
+{
+$appender =& $right;
+}
+else
+{
+// uhoh, block_id isn't valid. maybe a plugin wants to put this block somewhere else?
+$code = $plugins->setHook('sidebar_block_id');
+foreach ( $code as $cmd )
+{
+eval($cmd);
+}
+// if $appender wasn't set by a plugin, don't parse this block to save some CPU cycles
+if ( !$appender )
+{
+continue;
+}
+}
+// assign variables to parser
+$block_name = $this->tplWikiFormat($row['block_name']);
+$parser->assign_vars(array(
+// be nice and format the title (FIXME, does this use a lot of CPU time? still needs l10n in some cases though)
+'TITLE' => $block_name,
+'CONTENT' => $block_content
+));
+$parsed = $parser->run();
+// plugins are parsed earlier due to the way disabled/missing plugins that add sidebar blocks are
+// handled, so the {TITLE} var won't be replaced until now. this allows completely eliminating a
+// block if it's not available
 if ( $row['block_type'] == BLOCK_PLUGIN )
 {
-$run = str_replace('{TITLE}', $this->tplWikiFormat($row['block_name']), $run);
+$parsed = str_replace('{TITLE}', $block_name, $parsed);
 }
-if    ($row['sidebar_id'] == SIDEBAR_LEFT ) $left  .= $run;
-elseif($row['sidebar_id'] == SIDEBAR_RIGHT) $right .= $run;
+// done parsing - append and continue
-unset($parser);
+$appender .= $parsed;
-}
-$db->free_result();
+// we're done with this - unset it because it's a reference and we don't want it overwritten.
+// also free the parser to get some RAM back
+unset($appender, $parser);
+}
+// lastly, append any footer HTML
 if(isset($vars['sidebar_bottom']))
 {
 $bottom = $this->parse($vars['sidebar_bottom']);
 $left  .= $bottom;
 $right .= $bottom;
-}
+$min   .= $bottom;
-$min = '';
+}
-if(isset($vars['sidebar_top']))
-{
+$return = array($left, $right, $min);
-$min .= $top;
-}
+// allow any plugins to append what they want to the return
-if(isset($vars['sidebar_bottom']))
+$code = $plugins->setHook('sidebar_fetch_return');
-{
+foreach ( $code as $cmd )
-$min .= $bottom;
+{
-}
+eval($cmd);
-$return = Array($left, $right, $min);
+}
-if ( getConfig('cache_thumbs') == '1' && !$session->user_logged_in )
-{
+// cache the result if appropriate
-$cachestore = enano_json_encode($return);
+$this->cache_compiled_sidebar($return);
-$cachestore = str_replace($session->username, '$USERNAME$', $cachestore);
-$cachestore = str_replace($paths->page, '$PAGEID$', $cachestore);
+profiler_log('Finished sidebar parsing');
-$cachestore = str_replace('__STATICLINK__', $paths->page, $cachestore);
-$cachestore = str_replace('__MAINPAGELINK__', '$MAIN_PAGE$', $cachestore);
-$cachestore = enano_json_decode($cachestore);
-$cachestore['_theme_'] = $this->theme;
-$cache->store('anon_sidebar', $cachestore, 10);
-foreach ( $return as &$el )
-{
-$el = str_replace('__STATICLINK__', $paths->page, $el);
-}
-}
 return $return;
+}
+/**
+* Runs the appropriate formatting routine on a sidebar row.
+* @param array Row in sidebar table
+* @param array Template variable set from elements.tpl
+* @param null Pass by reference, will be filled with the parser according to the block's type (sidebar_section or sidebar_section_raw)
+* @return string HTML + directives like {restrict} or {hideif}
+*/
+function format_sidebar_block($row, $vars, &$parser)
+{
+// import globals in case a PHP block wants to call the Enano API
+global $db, $session, $paths, $template, $plugins; // Common objects
+$parser = null;
+switch($row['block_type'])
+{
+case BLOCK_WIKIFORMAT:
+$parser = $this->makeParserText($vars['sidebar_section']);
+$c = RenderMan::render($row['block_content']);
+break;
+case BLOCK_TEMPLATEFORMAT:
+$parser = $this->makeParserText($vars['sidebar_section']);
+$c = $this->tplWikiFormat($row['block_content']);
+break;
+case BLOCK_HTML:
+$parser = $this->makeParserText($vars['sidebar_section_raw']);
+$c = $row['block_content'];
+break;
+case BLOCK_PHP:
+// PHP blocks need to be sent directly to eval()
+$parser = $this->makeParserText($vars['sidebar_section_raw']);
+ob_start();
+@eval($row['block_content']);
+$c = ob_get_contents();
+ob_end_clean();
+break;
+case BLOCK_PLUGIN:
+$parser = $this->makeParserText('{CONTENT}');
+$c = '<!-- PLUGIN -->' . (gettype($this->fetch_block($row['block_content'])) == 'string') ?
+$this->fetch_block($row['block_content']) :
+// This used to say "can't find plugin block" but I think it's more friendly to just silently hide it.
+'';
+break;
+default:
+// unknown block type - can a plugin handle it?
+$code = $plugins->setHook('format_sidebar_block');
+foreach ( $code as $cmd )
+{
+eval($cmd);
+}
+if ( !isset($c) )
+{
+// default to wiki formatting (this was going to be straight HTML but this is done for backwards compatibility reasons)
+$c = RenderMan::render($row['block_content']);
+}
+if ( !$parser )
+{
+// no parser defined, use the "raw" section by default (plugins are more likely to want raw content
+// rather than a list of links, and they can set the parser to use sidebar_section if they want)
+$parser = $this->makeParserText($vars['sidebar_section_raw']);
+}
+break;
+}
+return $c;
+}
+/**
+* Returns the list of things that should not be cached (sorry, I was listening to "The Thing That Should Not Be" by Metallica when I
+* wrote this routine. You should get a copy of Master of Puppets, it's a damn good album.)
+* @return array
+*/
+function get_cache_replacements()
+{
+global $db, $session, $paths, $template, $plugins; // Common objects
+return array(
+'$LOGIN_LINK$' => $this->tpl_strings['LOGIN_LINK'],
+'$MAIN_PAGE$' => $this->tpl_strings['MAIN_PAGE'],
+'$USERNAME$' => $session->username
+);
+}
+/**
+* Attempts to load a cached compiled sidebar.
+* @return array Same format as fetch_sidebar()
+*/
+function fetch_cached_sidebar()
+{
+global $db, $session, $paths, $template, $plugins; // Common objects
+global $cache;
+$cached = false;
+if ( ($result = $cache->fetch('anon_sidebar')) && !$session->user_logged_in )
+{
+if ( isset($result[$this->theme]) )
+{
+$cached = $result[$this->theme];
+}
+}
+// if we haven't been able to fetch yet, see if a plugin wants to give us something
+if ( !$cached )
+{
+$code = $plugins->setHook('fetch_cached_sidebar');
+foreach ( $code as $cmd )
+{
+eval($cmd);
+}
+}
+if ( is_array($cached) )
+{
+// fetch certain variables that can't be stored in the cache and quickly substitute
+$replace = $this->get_cache_replacements();
+foreach ( $cached as &$val )
+{
+$val = strtr($val, $replace);
+}
+// done processing, send it back
+return $cached;
+}
+return false;
+}
+/**
+* Caches a completely compiled sidebar, if appropriate
+* @param array Effectively, return from fetch_sidebar()
+*/
+function cache_compiled_sidebar($sidebar)
+{
+global $db, $session, $paths, $template, $plugins; // Common objects
+global $cache;
+// check if conditions are right
+if ( !$session->user_logged_in && getConfig('cache_thumbs') === '1' )
+{
+// load any existing cache to make sure other themes' cached sidebars aren't discarded
+$cached = ( $_ = $cache->fetch('anon_sidebar') ) ? $_ : array();
+// replace variables
+$replace = array_flip($this->get_cache_replacements());
+foreach ( $sidebar as &$section )
+{
+$section = strtr($section, $replace);
+}
+// compile
+$cached[$this->theme] = $sidebar;
+// store
+$cache->store('anon_sidebar', $cached, 15);
+}
 }
 function initLinksWidget()
 {
 global $db, $session, $paths, $template, $plugins; // Common objects

changeset 708	162763d69256
parent 704	077887be639d
child 723	78d391d37700