mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-01 13:48:37 +02:00
MINOR: Remove now-obsolete old partial cache code
This commit is contained in:
Hamish Friedlander
parent
29c06edd23
commit
31c5bb24f7
@ -586,7 +586,7 @@ class SSViewer {
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}
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$scope = new SSViewer_DataPresenter($item, array('I18NNamespace' => basename($template)));
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$val = ""; $valStack = array();
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$val = "";
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include($cacheFile);
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@ -702,256 +702,3 @@ class SSViewer_FromString extends SSViewer {
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return $val;
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}
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}
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/**
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* Handle the parsing for cacheblock tags.
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*
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* Needs to be handled differently from the other tags, because cacheblock can take any number of arguments
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*
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* This shouldn't be used as an example of how to add functionality to SSViewer - the eventual plan is to re-write
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* SSViewer using a proper parser (probably http://github.com/hafriedlander/php-peg), so that extra functionality
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* can be added without relying on ad-hoc parsers like this.
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*
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* @package sapphire
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* @subpackage view
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*/
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class SSViewer_PartialParser {
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static $tag = '/< % [ \t]+ (cached|cacheblock|uncached|end_cached|end_cacheblock|end_uncached) [ \t]+ ([^%]+ [ \t]+)? % >/xS';
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static $argument_splitter = '/^\s*
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# The argument itself
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(
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(?P<conditional> if | unless ) | # The if or unless keybreak
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(?P<property> (?P<identifier> \w+) \s* # A property lookup or a function call
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( \( (?P<arguments> [^\)]*) \) )?
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) |
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(?P<sqstring> \' (\\\'|[^\'])+ \' ) | # A string surrounded by \'
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(?P<dqstring> " (\\"|[^"])+ " ) # A string surrounded by "
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)
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# Some seperator after the argument
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(
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\s*(?P<comma>,)\s* | # A comma (maybe with whitespace before or after)
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(?P<fullstop>\.) # A period (no whitespace before)
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)?
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/xS';
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static function process($template, $content) {
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$parser = new SSViewer_PartialParser($template, $content, 0);
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$parser->parse();
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return $parser->generate();
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}
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function __construct($template, $content, $offset) {
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$this->template = $template;
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$this->content = $content;
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$this->offset = $offset;
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$this->blocks = array();
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}
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function controlcheck($text) {
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// NOP - hook for Cached_PartialParser
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}
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function parse() {
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$current_tag_offset = 0;
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while (preg_match(self::$tag, $this->content, $matches, PREG_OFFSET_CAPTURE, $this->offset)) {
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$tag = $matches[1][0];
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$startpos = $matches[0][1];
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$endpos = $matches[0][1] + strlen($matches[0][0]);
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switch($tag) {
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case 'cached':
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case 'uncached':
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case 'cacheblock':
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$pretext = substr($this->content, $this->offset, $startpos - $this->offset);
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$this->controlcheck($pretext);
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$this->blocks[] = $pretext;
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if ($tag == 'cached' || $tag == 'cacheblock') {
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list($keyparts, $conditional, $condition) = $this->parseargs(@$matches[2][0]);
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$parser = new SSViewer_Cached_PartialParser($this->template, $this->content, $endpos, $keyparts, $conditional, $condition);
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}
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else {
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$parser = new SSViewer_PartialParser($this->template, $this->content, $endpos);
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}
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$parser->parse();
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$this->blocks[] = $parser;
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$this->offset = $parser->offset;
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break;
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case 'end_cached':
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case 'end_cacheblock':
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case 'end_uncached':
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$this->blocks[] = substr($this->content, $this->offset, $startpos - $this->offset);
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$this->content = null;
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$this->offset = $endpos;
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return $this;
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}
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}
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$this->blocks[] = substr($this->content, $this->offset);
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$this->content = null;
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}
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function parseargs($string) {
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preg_match_all(self::$argument_splitter, $string, $matches, PREG_SET_ORDER);
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$parts = array();
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$conditional = null; $condition = null;
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$current = '$item->';
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while (strlen($string) && preg_match(self::$argument_splitter, $string, $match)) {
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$string = substr($string, strlen($match[0]));
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// If this is a conditional keyword, break, and the next loop will grab the conditional
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if (@$match['conditional']) {
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$conditional = $match['conditional'];
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continue;
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}
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// If it's a property lookup or a function call
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if (@$match['property']) {
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// Get the property
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$what = $match['identifier'];
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$args = array();
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// Extract any arguments passed to the function call
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if (@$match['arguments']) {
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foreach (explode(',', $match['arguments']) as $arg) {
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$args[] = is_numeric($arg) ? (string)$arg : '"'.$arg.'"';
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}
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}
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$args = empty($args) ? 'null' : 'array('.implode(',',$args).')';
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// If this fragment ended with '.', then there's another lookup coming, so return an obj for that lookup
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if (@$match['fullstop']) {
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$current .= "obj('$what', $args, true)->";
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}
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// Otherwise this is the end of the lookup chain, so add the resultant value to the key array and reset the key-get php fragement
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else {
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$accessor = $current . "XML_val('$what', $args, true)"; $current = '$item->';
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// If we've hit a conditional already, this is the condition. Set it and be done.
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if ($conditional) {
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$condition = $accessor;
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break;
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}
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// Otherwise we're another key component. Add it to array.
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else $parts[] = $accessor;
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}
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}
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// Else it's a quoted string of some kind
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else if (@$match['sqstring']) $parts[] = $match['sqstring'];
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else if (@$match['dqstring']) $parts[] = $match['dqstring'];
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}
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if ($conditional && !$condition) {
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throw new Exception("You need to have a condition after the conditional $conditional in your cache block");
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}
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return array($parts, $conditional, $condition);
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}
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function generate() {
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$res = array();
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foreach ($this->blocks as $i => $block) {
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if ($block instanceof SSViewer_PartialParser)
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$res[] = $block->generate();
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else {
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$res[] = $block;
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}
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}
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return implode('', $res);
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}
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}
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/**
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* @package sapphire
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* @subpackage view
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*/
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class SSViewer_Cached_PartialParser extends SSViewer_PartialParser {
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function __construct($template, $content, $offset, $keyparts, $conditional, $condition) {
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$this->keyparts = $keyparts;
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$this->conditional = $conditional;
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$this->condition = $condition;
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parent::__construct($template, $content, $offset);
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}
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function controlcheck($text) {
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$ifs = preg_match_all('/<'.'% +if +/', $text, $matches);
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$end_ifs = preg_match_all('/<'.'% +end_if +/', $text, $matches);
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if ($ifs != $end_ifs) throw new Exception('You can\'t have cached or uncached blocks within condition structures');
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$controls = preg_match_all('/<'.'% +control +/', $text, $matches);
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$end_controls = preg_match_all('/<'.'% +end_control +/', $text, $matches);
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if ($controls != $end_controls) throw new Exception('You can\'t have cached or uncached blocks within control structures');
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}
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function key() {
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if (empty($this->keyparts)) return "''";
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return 'sha1(' . implode(".'_'.", $this->keyparts) . ')';
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}
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function generate() {
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$res = array();
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$key = $this->key();
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$condition = "";
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switch ($this->conditional) {
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case 'if':
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$condition = "{$this->condition} && ";
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break;
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case 'unless':
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$condition = "!({$this->condition}) && ";
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break;
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}
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/* Output this set of blocks */
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foreach ($this->blocks as $i => $block) {
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if ($block instanceof SSViewer_PartialParser)
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$res[] = $block->generate();
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else {
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// Include the template name and this cache block's current contents as a sha hash, so we get auto-seperation
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// of cache blocks, and invalidation of the cache when the template changes
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$partialkey = "'".sha1($this->template . $block)."_'.$key.'_$i'";
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// Try to load from cache
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$res[] = "<?\n".'if ('.$condition.' ($partial = $cache->load('.$partialkey.'))) $val .= $partial;'."\n";
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// Cache miss - regenerate
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$res[] = "else {\n";
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$res[] = '$oldval = $val; $val = "";'."\n";
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$res[] = "\n?>" . $block . "<?\n";
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$res[] = $condition . ' $cache->save($val); $val = $oldval . $val ;'."\n";
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$res[] = "}\n?>";
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}
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}
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return implode('', $res);
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}
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}
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function supressOutput() {
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return "";
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}
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?>
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