147 lines
4.0 KiB
PHP
147 lines
4.0 KiB
PHP
<?php
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namespace Driver\SQL;
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abstract class SQL {
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protected $lastError;
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protected $connection;
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protected $connectionData;
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protected $lastInsertId;
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public function __construct($connectionData) {
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$this->connection = NULL;
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$this->lastError = 'Not connected';
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$this->connectionData = $connectionData;
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$this->lastInsertId = 0;
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}
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public function isConnected() {
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return !is_null($this->connection);
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}
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public function getLastError() {
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return trim($this->lastError);
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}
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public function createTable($tableName) {
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return new Query\CreateTable($this, $tableName);
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}
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public function insert($tableName, $columns=array()) {
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return new Query\Insert($this, $tableName, $columns);
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}
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public function select(...$columNames) {
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return new Query\Select($this, $columNames);
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}
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public function truncate($table) {
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return new Query\Truncate($this, $table);
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}
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public function delete($table) {
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return new Query\Delete($this, $table);
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}
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public function update($table) {
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return new Query\Update($this, $table);
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}
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// ####################
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// ### ABSTRACT METHODS
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// ####################
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// Misc
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public abstract function checkRequirements();
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public abstract function getDriverName();
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// Connection Managment
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public abstract function connect();
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public abstract function disconnect();
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// Querybuilder
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public abstract function executeCreateTable($query);
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public abstract function executeInsert($query);
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public abstract function executeSelect($query);
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public abstract function executeDelete($query);
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public abstract function executeTruncate($query);
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public abstract function executeUpdate($query);
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protected abstract function getColumnDefinition($column);
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protected abstract function getConstraintDefinition($constraint);
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protected abstract function getValueDefinition($val);
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protected abstract function addValue($val, &$params);
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protected abstract function tableName($table);
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protected abstract function columnName($col);
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// Special Keywords and functions
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public abstract function currentTimestamp();
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public abstract function count($col = NULL);
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// Statements
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protected abstract function execute($query, $values=NULL, $returnValues=false);
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protected function buildCondition($condition, &$params) {
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if ($condition instanceof \Driver\SQL\Condition\CondOr) {
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$conditions = array();
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foreach($condition->getConditions() as $cond) {
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$conditions[] = $this->buildCondition($cond, $params);
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}
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return "(" . implode(" OR ", $conditions) . ")";
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} else if ($condition instanceof \Driver\SQL\Condition\Compare) {
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$column = $this->columnName($condition->getColumn());
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$value = $condition->getValue();
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$operator = $condition->getOperator();
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return $column . $operator . $this->addValue($value, $params);
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} else if ($condition instanceof \Driver\SQL\Condition\CondBool) {
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return $this->columnName($condition->getValue());
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} else if (is_array($condition)) {
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if (count($condition) == 1) {
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return $this->buildCondition($condition[0], $params);
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} else {
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$conditions = array();
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foreach($condition as $cond) {
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$conditions[] = $this->buildCondition($cond, $params);
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}
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return implode(" AND ", $conditions);
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}
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}
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}
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public function setLastError($str) {
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$this->lastError = $str;
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}
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public function getLastInsertId() {
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return $this->lastInsertId;
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}
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public function close() {
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$this->disconnect();
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$this->connection = NULL;
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}
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public static function createConnection($connectionData) {
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$type = $connectionData->getProperty("type");
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if ($type === "mysql") {
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$sql = new MySQL($connectionData);
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} else if ($type === "postgres") {
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$sql = new PostgreSQL($connectionData);
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/*} else if ($type === "oracle") {
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// $sql = new OracleSQL($connectionData);
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*/
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} else {
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return "Unknown database type";
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}
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if ($sql->checkRequirements()) {
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$sql->connect();
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}
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return $sql;
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}
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}
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?>
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