144 lines
No EOL
2.5 KiB
PHP
Executable file
144 lines
No EOL
2.5 KiB
PHP
Executable file
<?php
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/**
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* @brief base exception for database queries
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*/
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class DatabaseException extends CustomException {}
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/**
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* @brief abstract resultset definition
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*/
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abstract class DBResultSet implements Iterator {
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/**
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* @brief rowcount of the result
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* @var int
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*/
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protected $_num_rows = 0;
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/**
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* @brief result
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* @var array
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*/
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protected $_rows = array();
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/**
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* @param resource $resource database resource
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*/
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abstract function __construct($resource);
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/**
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* @brief current element (iterator)
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* @return array
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*/
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public function current() {
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return current($this->_rows);
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}
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/**
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* @brief next element (iterator)
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* @return array
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*/
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public function next() {
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return next($this->_rows);
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}
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/**
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* @brief index of current element (iterator)
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* @return array
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*/
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public function key() {
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return key($this->_rows);
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}
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/**
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* @brief first element (pointer reset, iterator)
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* @return array
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*/
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public function rewind() {
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return reset($this->_rows);
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}
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/**
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* @brief check current element (iterator)
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* @return bool
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*/
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public function valid() {
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return (bool) is_array($this->current());
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}
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public function first() {
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return (isset($this->_rows[0])) ? $this->_rows[0] : null;
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}
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public function last() {
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return $this->_rows[$this->_num_rows - 1];
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}
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public function count() {
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return $this->_num_rows;
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}
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}
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/**
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* @brief interface database definition
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*/
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interface IDatabase {
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/**
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* @brief create database connection
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* @param string $host IP or domain of the database host
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* @param string $user user
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* @param string $passwd password
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*/
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public function connect($host, $user, $pw);
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/**
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* @brief close database connection
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*/
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public function close();
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/**
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* @brief select database
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* @param string $name name of database
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*/
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public function select($db);
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/**
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* @brief execute query
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* @param string $sql query
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* @return mixed
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*/
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public function execute($sql);
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/**
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* @brief query
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* @param string $sql
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* @param int $offset
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* @param int $limit
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* @return TDatabaseResultSet
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*/
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public function query($sql, $limit = -1, $offset = 0);
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}
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/**
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* @brief abstract database layer definition
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*/
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abstract class Database implements IDatabase {
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/**
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* @brief current database
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* @var string
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*/
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protected $database = '';
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/**
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* @brief database handle
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* @var resource
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*/
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protected $resource = false;
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/**
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* @brief container with exectuted queries
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* @var array
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*/
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protected $statements = array();
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}
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?>
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