mirror of
https://github.com/silverstripe/silverstripe-textextraction
synced 2024-10-22 11:06:00 +02:00
106 lines
2.2 KiB
PHP
106 lines
2.2 KiB
PHP
<?php
|
|
|
|
interface FileTextCache {
|
|
|
|
/**
|
|
* Save extracted content for a given File entity
|
|
*
|
|
* @param File $file
|
|
* @param string $content
|
|
*/
|
|
public function save(File $file, $content);
|
|
|
|
/**
|
|
* Return any cached extracted content for a given file entity
|
|
*
|
|
* @param File $file
|
|
*/
|
|
public function load(File $file);
|
|
|
|
/**
|
|
* Invalidate the cache for a given file.
|
|
* Invoked in onBeforeWrite on the file
|
|
*
|
|
* @param File $file
|
|
*/
|
|
public function invalidate(File $file);
|
|
}
|
|
|
|
/**
|
|
* Caches the extracted content on the record for the file.
|
|
* Limits the stored file content by default to avoid hitting query size limits.
|
|
*/
|
|
class FileTextCache_Database implements FileTextCache {
|
|
|
|
public function load(File $file) {
|
|
return $file->FileContentCache;
|
|
}
|
|
|
|
public function save(File $file, $content) {
|
|
$maxLength = Config::inst()->get('FileTextCache_Database', 'max_content_length');
|
|
$file->FileContentCache = ($maxLength) ? substr($content, 0, $maxLength) : $content;
|
|
$file->write();
|
|
}
|
|
|
|
public function invalidate(File $file) {
|
|
// To prevent writing to the cache from invalidating it
|
|
if(!$file->isChanged('FileContentCache')) {
|
|
$file->FileContentCache = '';
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Uses SS_Cache with a lifetime to cache extracted content
|
|
*/
|
|
class FileTextCache_SSCache implements FileTextCache, Flushable {
|
|
|
|
/**
|
|
* Lifetime of cache in seconds
|
|
* Null is indefinite
|
|
*
|
|
* @var int|null
|
|
* @config
|
|
*/
|
|
private static $lifetime = null;
|
|
|
|
/**
|
|
* @return SS_Cache
|
|
*/
|
|
protected static function get_cache() {
|
|
$lifetime = Config::inst()->get(__CLASS__, 'lifetime');
|
|
$cache = SS_Cache::factory(__CLASS__);
|
|
$cache->setLifetime($lifetime);
|
|
return $cache;
|
|
}
|
|
|
|
protected function getKey(File $file) {
|
|
return md5($file->getFullPath());
|
|
}
|
|
|
|
public function load(File $file) {
|
|
$key = $this->getKey($file);
|
|
$cache = self::get_cache();
|
|
return $cache->load($key);
|
|
}
|
|
|
|
public function save(File $file, $content) {
|
|
$key = $this->getKey($file);
|
|
$cache = self::get_cache();
|
|
return $cache->save($content, $key);
|
|
}
|
|
|
|
public static function flush() {
|
|
$cache = self::get_cache();
|
|
$cache->clean();
|
|
}
|
|
|
|
public function invalidate(File $file) {
|
|
$key = $this->getKey($file);
|
|
$cache = self::get_cache();
|
|
return $cache->remove($key);
|
|
}
|
|
|
|
}
|