94 lines
1.7 KiB
PHP
Executable File
94 lines
1.7 KiB
PHP
Executable File
<?php
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define('FP_SORTING', SORT_DESC);
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class cache_filelister extends fs_filelister {
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var $_cachefile = null;
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// sub-classes will fill the above variables on constructing
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function cache_filelister() {
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if (!$this->_cachefile)
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trigger_error('CACHE: no cache file specified');
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$varname = $this->_varname;
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if (file_exists($this->_cachefile)) {
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//include($this->_cachefile);
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$var = io_load_file($this->_cachefile);
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$this->_list = unserialize($var);
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} else {
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parent::fs_filelister();
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$this->save();
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}
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return $this->_list;
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}
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function checksorting() {
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list($k1) = each($this->_list);
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list($k2) = each($this->_list);
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// decreasing order
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if ((FP_SORTING==SORT_DESC) & (strcmp($k1, $k2) < 0)) {
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$this->save;
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}
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}
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function save() {
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// TODO: re-think this :)
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// reverse sorting on save is an acceptable overhead,
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// still this is quite an hack
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krsort($this->_list);
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$succ = io_write_file($this->_cachefile, serialize($this->_list));
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if (!$succ){
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trigger_error("Error while saving data in {$this->_cachefile}",
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E_USER_WARNING);
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return false;
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} else return $this->_list;
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}
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function getList() {
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return $this->_list;
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}
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function get($id) {
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return isset($this->_list[$id])? $this->_list[$id] : false;
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}
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function add($id, $val) {
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$this->_list[$id]=$val;
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return $this->save();
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}
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function delete($entryid) {
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$cache =& $this->_list;
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unset($cache[$entryid]); // if id found, it is deleted
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return $this->save();
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}
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function purge() {
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return fs_delete($this->_cachefile);
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}
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}
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?>
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