106 lines
3.1 KiB
PHP
106 lines
3.1 KiB
PHP
<?php
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/* Copyright (C) 2006-2019 Tobias Leupold <tobias.leupold@gmx.de>
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This file is part of the b8 package
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation in version 2.1 of the License.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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namespace b8\storage;
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/**
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* A Berkeley DB (DBA) storage backend
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*
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* @license LGPL 2.1
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* @package b8
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* @author Tobias Leupold <tobias.leupold@gmx.de>
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*/
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class dba extends storage_base
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{
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private $db = null;
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protected function setup_backend(array $config)
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{
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if (! isset($config['resource'])
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|| gettype($config['resource']) !== 'resource'
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|| get_resource_type($config['resource']) !== 'dba') {
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throw new \Exception(dba::class . ": No valid DBA resource passed");
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}
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$this->db = $config['resource'];
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}
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protected function fetch_token_data(array $tokens)
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{
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$data = [];
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foreach ($tokens as $token) {
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// Try to the raw data in the format "count_ham count_spam"
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$count = dba_fetch($token, $this->db);
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if ($count !== false) {
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// Split the data by space characters
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$split_data = explode(' ', $count);
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// As an internal variable may have just one single value, we have to check for this
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$count_ham = isset($split_data[0]) ? (int) $split_data[0] : null;
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$count_spam = isset($split_data[1]) ? (int) $split_data[1] : null;
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// Append the parsed data
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$data[$token] = [ \b8\b8::KEY_COUNT_HAM => $count_ham,
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\b8\b8::KEY_COUNT_SPAM => $count_spam ];
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}
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}
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return $data;
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}
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private function assemble_count_value(array $count)
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{
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// Assemble the count data string
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$count_value = $count[\b8\b8::KEY_COUNT_HAM] . ' ' . $count[\b8\b8::KEY_COUNT_SPAM];
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// Remove whitespace from data of the internal variables
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return(rtrim($count_value));
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}
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protected function add_token(string $token, array $count)
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{
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return dba_insert($token, $this->assemble_count_value($count), $this->db);
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}
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protected function update_token(string $token, array $count)
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{
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return dba_replace($token, $this->assemble_count_value($count), $this->db);
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}
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protected function delete_token(string $token)
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{
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return dba_delete($token, $this->db);
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}
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protected function start_transaction()
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{
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return;
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}
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protected function finish_transaction()
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{
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return;
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}
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}
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