file.class.php

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<?php
class cache_file extends cache_abstract {

        protected $prmVar;

        protected $prmOut;

        private $obSave;

        public function get(&$value, array $prm) {
                if ($this->isEnabled() &&
                        config::initTab($prm, array(
                                        'ttl'=>$this->cfg->ttl,
                                        'id'=>null,
                                        'tags'=>$this->cfg->tags,
                                        'request'=>$this->cfg->request,
                                        'serialize'=>$this->cfg->serialize
                                ))) {
                        $prm['value'] = &$value;
                        $prm['file'] = $this->file(array_merge($prm,
                                                        array('callFrom'=>debug::callFrom(1),'type'=>'get')));
                        $this->prmVar = $prm;
                        if (file::exists($prm['file']) &&
                                        ($prm['ttl'] == 0 || file::date($prm['file']) + $prm['ttl'] * 60 > time())) {
                                if ($prm['serialize'])
                                        $value = unserialize(file::read($prm['file']));
                                else
                                        eval('$value = '.file::read($prm['file']).';');
                                return true;
                        }
                }
                return false;
        }

        public function save() {
                $ret = null;
                if (!empty($this->prmVar))
                        if ($this->prmVar['serialize'])
                                $ret = file::write($this->prmVar['file'], serialize($this->prmVar['value']));
                        else
                                $ret = file::write($this->prmVar['file'], var_export($this->prmVar['value'], true));
                $this->prmVar = null;
                return $ret;
        }

        public function start(array $prm) {
                if ($this->isEnabled() && config::initTab($prm, array(
                                'ttl'=>$this->cfg->ttl,
                                'id'=>null,
                                'tags'=>$this->cfg->tags,
                                'request'=>$this->cfg->request
                        ))) {
                        $prm['file'] = $this->file(array_merge($prm,
                                                        array('callFrom'=>debug::callFrom(2),'type'=>'cache')));
                        if (file::exists($prm['file']) &&
                                ($prm['ttl'] == 0 ||
                                        file::date($prm['file']) + $prm['ttl'] * 60 > time())) {
                                echo file::read($prm['file']);
                                return true;
                        } else {
                                $this->obSave = '';
                                /*
                                if (ob_get_length()) {
                                        $this->obSave = ob_get_contents();
                                        ob_end_clean();
                                }
                                // */
                                ob_start();
                                $this->prmOut = $prm;
                        }
                }
                return false;
        }

        public function end() {
                $ret = null;
                if (!empty($this->prmOut)) {
                        $content = ob_get_contents();
                        ob_end_clean();
                        if ($this->obSave) {
                                echo $this->obSave.$content;
                                ob_start();
                        } else
                                echo $content;
                        $ret = file::write($this->prmOut['file'], $content);
                }
                $this->prmOut = null;
                return $ret;

        }

        public function delete(array $prm = array()) {
                if (config::initTab($prm, array(
                                'callFrom'=>'*',
                                'type'=>'*',
                                'id'=>'*',
                                'tags'=>false,
                                'request'=>array('uri'=>false,'meth'=>array())
                        ))) {
                        $file = $this->file($prm);
                        $file{strlen($file)-1} = '*';
                        if (!empty($prm['tags'])) {
                                for($i = 0; $i<count($prm['tags']); $i++) {
                                        $file = str_replace(','.$prm['tags'][$i].',', '*,'.$prm['tags'][$i].',', $file);
                                }
                        }
                        $files = glob($file);
                        $nb = 0;
                        foreach($files as $f)
                                if (file::delete($f))
                                        $nb++;
                        return $nb;
                }
                return 0;
        }

        public function exists(array $prm) {
                return file::exists($this->file($prm));
        }


        private function file(array $prm) {
                $prm = array_merge(array(
                        'callFrom'=>null,
                        'type'=>null,
                        'id'=>null,
                        'tags'=>null,
                        'tagsS'=>null
                ), $prm);
                if (!empty($prm['tags'])) {
                        sort($prm['tags']);
                        $prm['tagsS'] = ',_,'.implode(',_,', $prm['tags']).',_,';
                }
                $fileA = array_merge($this->cfg->startFile, array(
                                $prm['callFrom'],
                                $prm['type'],
                                $prm['id'],
                                $prm['tagsS'],
                                null, //cache::idRequest($prm['request'])
                        ));
                return str_replace(
                                array('-REQUEST::LANG-', '-REQUEST::OUT-'),
                                array(request::get('lang'), request::get('out')),
                                $this->cfg->path.implode('^', $fileA).'.cache');
        }

}