430 lines
12 KiB
PHP
430 lines
12 KiB
PHP
<?php
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namespace Driver\SQL;
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use \Api\Parameter\Parameter;
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use \Driver\SQL\Column\Column;
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use \Driver\SQL\Column\IntColumn;
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use \Driver\SQL\Column\SerialColumn;
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use \Driver\SQL\Column\StringColumn;
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use \Driver\SQL\Column\EnumColumn;
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use \Driver\SQL\Column\DateTimeColumn;
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use Driver\SQL\Column\BoolColumn;
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use Driver\SQL\Column\JsonColumn;
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use \Driver\SQL\Strategy\CascadeStrategy;
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use \Driver\SQL\Strategy\SetDefaultStrategy;
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use \Driver\SQL\Strategy\SetNullStrategy;
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use \Driver\SQL\Strategy\UpdateStrategy;
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use \Driver\SQL\Constraint\Unique;
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use \Driver\SQL\Constraint\PrimaryKey;
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use \Driver\SQL\Constraint\ForeignKey;
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class PostgreSQL extends SQL {
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public function __construct($connectionData) {
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parent::__construct($connectionData);
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}
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public function checkRequirements() {
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return function_exists('pg_connect');
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}
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public function getDriverName() {
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return 'pgsql';
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}
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// Connection Managment
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public function connect() {
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if(!is_null($this->connection)) {
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return true;
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}
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$config = array(
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"host" => $this->connectionData->getHost(),
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"port" => $this->connectionData->getPort(),
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"dbname" => $this->connectionData->getProperty('database', 'public'),
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"user" => $this->connectionData->getLogin(),
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"password" => $this->connectionData->getPassword()
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);
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$connectionString = array();
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foreach($config as $key => $val) {
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if (!empty($val)) {
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$connectionString[] = "$key=$val";
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}
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}
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$this->connection = @pg_connect(implode(" ", $connectionString));
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if (!$this->connection) {
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$this->lastError = "Failed to connect to Database";
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$this->connection = NULL;
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return false;
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}
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pg_set_client_encoding($this->connection, $this->connectionData->getProperty('encoding', 'UTF-8'));
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return true;
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}
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public function disconnect() {
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if(is_null($this->connection))
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return;
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pg_close($this->connection);
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}
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public function getLastError() {
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$lastError = parent::getLastError();
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if (empty($lastError)) {
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$lastError = pg_last_error($this->connection) . " " . pg_last_error($this->connection);
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}
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return $lastError;
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}
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protected function execute($query, $values = NULL, $returnValues = false) {
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$this->lastError = "";
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$stmt_name = uniqid();
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$pgParams = array();
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if (!is_null($values)) {
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foreach($values as $value) {
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$paramType = Parameter::parseType($value);
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switch($paramType) {
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case Parameter::TYPE_DATE:
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$value = $value->format("Y-m-d");
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break;
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case Parameter::TYPE_TIME:
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$value = $value->format("H:i:s");
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break;
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case Parameter::TYPE_DATE_TIME:
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$value = $value->format("Y-m-d H:i:s");
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break;
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default:
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break;
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}
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$pgParams[] = $value;
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}
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}
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$stmt = @pg_prepare($this->connection, $stmt_name, $query);
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if ($stmt === FALSE) {
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return false;
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}
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$result = @pg_execute($this->connection, $stmt_name, $pgParams);
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if ($result === FALSE) {
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return false;
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}
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if ($returnValues) {
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$rows = pg_fetch_all($result);
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if ($rows === FALSE) {
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if (empty(trim($this->getLastError()))) {
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$rows = array();
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}
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}
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return $rows;
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} else {
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return true;
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}
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}
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// Querybuilder
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public function executeInsert($insert) {
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$tableName = $this->tableName($insert->getTableName());
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$columns = $insert->getColumns();
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$rows = $insert->getRows();
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$onDuplicateKey = $insert->onDuplicateKey() ?? "";
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if (empty($rows)) {
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$this->lastError = "No rows to insert given.";
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return false;
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}
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if (is_null($columns) || empty($columns)) {
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$columnStr = "";
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} else {
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$columnStr = " (" . $this->columnName($columns) . ")";
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}
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$numRows = count($rows);
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$parameters = array();
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$values = array();
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foreach($rows as $row) {
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$rowPlaceHolder = array();
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foreach($row as $val) {
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$rowPlaceHolder[] = $this->addValue($val, $parameters);
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}
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$values[] = "(" . implode(",", $rowPlaceHolder) . ")";
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}
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$values = implode(",", $values);
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if ($onDuplicateKey) {
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/*if ($onDuplicateKey instanceof UpdateStrategy) {
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$updateValues = array();
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foreach($onDuplicateKey->getValues() as $key => $value) {
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if ($value instanceof Column) {
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$columnName = $value->getName();
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$updateValues[] = "\"$key\"=\"$columnName\"";
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} else {
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$updateValues[] = "\"$key\"=" . $this->addValue($value, $parameters);
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}
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}
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$onDuplicateKey = " ON CONFLICT DO UPDATE SET " . implode(",", $updateValues);
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} else*/ {
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$strategy = get_class($onDuplicateKey);
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$this->lastError = "ON DUPLICATE Strategy $strategy is not supported yet.";
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return false;
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}
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}
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$returningCol = $insert->getReturning();
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$returning = $returningCol ? (" RETURNING " . $this->columnName($returningCol)) : "";
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$query = "INSERT INTO $tableName$columnStr VALUES$values$onDuplicateKey$returning";
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$res = $this->execute($query, $parameters, !empty($returning));
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$success = ($res !== FALSE);
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if($success && !empty($returning)) {
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$this->lastInsertId = $res[0][$returningCol];
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}
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return $success;
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}
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public function executeSelect($select) {
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$columns = $this->columnName($select->getColumns());
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$tables = $select->getTables();
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$params = array();
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if (is_null($tables) || empty($tables)) {
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return "SELECT $columns";
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} else {
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$tableStr = $this->tableName($tables);
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}
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$conditions = $select->getConditions();
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if (!empty($conditions)) {
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$condition = " WHERE " . $this->buildCondition($conditions, $params);
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} else {
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$condition = "";
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}
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$joinStr = "";
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$joins = $select->getJoins();
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if (!empty($joins)) {
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$joinStr = "";
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foreach($joins as $join) {
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$type = $join->getType();
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$joinTable = $this->tableName($join->getTable());
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$columnA = $this->columnName($join->getColumnA());
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$columnB = $this->columnName($join->getColumnB());
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$joinStr .= " $type JOIN $joinTable ON $columnA=$columnB";
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}
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}
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$orderBy = "";
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$limit = "";
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$offset = "";
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$query = "SELECT $columns FROM $tableStr$joinStr$condition$orderBy$limit$offset";
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return $this->execute($query, $params, true);
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}
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public function executeDelete($delete) {
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$table = $delete->getTable();
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$conditions = $delete->getConditions();
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if (!empty($conditions)) {
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$condition = " WHERE " . $this->buildCondition($conditions, $params);
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} else {
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$condition = "";
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}
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$query = "DELETE FROM \"$table\"$condition";
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return $this->execute($query);
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}
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public function executeTruncate($truncate) {
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$table = $truncate->getTable();
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return $this->execute("TRUNCATE \"$table\"");
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}
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public function executeUpdate($update) {
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$params = array();
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$table = $update->getTable();
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$valueStr = array();
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foreach($update->getValues() as $key => $val) {
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$valueStr[] = "$key=" . $this->addValue($val, $params);
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}
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$valueStr = implode(",", $valueStr);
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$conditions = $update->getConditions();
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if (!empty($conditions)) {
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$condition = " WHERE " . $this->buildCondition($conditions, $params);
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} else {
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$condition = "";
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}
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$query = "UPDATE \"$table\" SET $valueStr$condition";
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return $this->execute($query, $params);
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}
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// UGLY but.. what should i do?
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private function createEnum($enumColumn) {
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$typeName = $enumColumn->getName();
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if(!endsWith($typeName, "_type")) {
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$typeName = "${typeName}_type";
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}
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$values = array();
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foreach($enumColumn->getValues() as $value) {
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$values[] = $this->getValueDefinition($value);
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}
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$values = implode(",", $values);
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$query =
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"DO $$ BEGIN
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CREATE TYPE \"$typeName\" AS ENUM ($values);
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EXCEPTION
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WHEN duplicate_object THEN null;
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END $$;";
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$this->execute($query);
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return $typeName;
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}
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protected function getColumnDefinition($column) {
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$columnName = $this->columnName($column->getName());
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if ($column instanceof StringColumn) {
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$maxSize = $column->getMaxSize();
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if ($maxSize) {
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$type = "VARCHAR($maxSize)";
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} else {
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$type = "TEXT";
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}
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} else if($column instanceof SerialColumn) {
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$type = "SERIAL";
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} else if($column instanceof IntColumn) {
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$type = "INTEGER";
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} else if($column instanceof DateTimeColumn) {
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$type = "TIMESTAMP";
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} else if($column instanceof EnumColumn) {
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$type = $this->createEnum($column);
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} else if($column instanceof BoolColumn) {
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$type = "BOOLEAN";
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} else if($column instanceof JsonColumn) {
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$type = "JSON";
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} else {
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$this->lastError = "Unsupported Column Type: " . get_class($column);
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return NULL;
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}
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$notNull = $column->notNull() ? " NOT NULL" : "";
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$defaultValue = "";
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if (!is_null($column->getDefaultValue()) || !$column->notNull()) {
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$defaultValue = " DEFAULT " . $this->getValueDefinition($column->getDefaultValue());
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}
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return "$columnName $type$notNull$defaultValue";
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}
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protected function getConstraintDefinition($constraint) {
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$columnName = $this->columnName($constraint->getColumnName());
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if ($constraint instanceof PrimaryKey) {
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return "PRIMARY KEY ($columnName)";
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} else if ($constraint instanceof Unique) {
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return "UNIQUE ($columnName)";
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} else if ($constraint instanceof ForeignKey) {
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$refTable = $this->tableName($constraint->getReferencedTable());
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$refColumn = $this->columnName($constraint->getReferencedColumn());
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$strategy = $constraint->onDelete();
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$code = "FOREIGN KEY ($columnName) REFERENCES $refTable ($refColumn)";
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if ($strategy instanceof SetDefaultStrategy) {
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$code .= " ON DELETE SET DEFAULT";
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} else if($strategy instanceof SetNullStrategy) {
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$code .= " ON DELETE SET NULL";
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} else if($strategy instanceof CascadeStrategy) {
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$code .= " ON DELETE CASCADE";
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}
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return $code;
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}
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}
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protected function getValueDefinition($value) {
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if (is_numeric($value)) {
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return $value;
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} else if(is_bool($value)) {
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return $value ? "TRUE" : "FALSE";
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} else if(is_null($value)) {
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return "NULL";
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} else if($value instanceof Keyword) {
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return $value->getValue();
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} else {
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$str = str_replace("'", "''", $value);
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return "'$str'";
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}
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}
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protected function addValue($val, &$params) {
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if ($val instanceof Keyword) {
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return $val->getValue();
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} else {
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$params[] = is_bool($val) ? ($val ? "TRUE" : "FALSE") : $val;
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return '$' . count($params);
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}
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}
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protected function tableName($table) {
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if (is_array($table)) {
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$tables = array();
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foreach($table as $t) $tables[] = $this->tableName($t);
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return implode(",", $tables);
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} else {
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return "\"$table\"";
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}
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}
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protected function columnName($col) {
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if ($col instanceof KeyWord) {
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return $col->getValue();
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} elseif(is_array($col)) {
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$columns = array();
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foreach($col as $c) $columns[] = $this->columnName($c);
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return implode(",", $columns);
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} else {
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if (($index = strrpos($col, ".")) !== FALSE) {
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$tableName = $this->tableName(substr($col, 0, $index));
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$columnName = $this->columnName(substr($col, $index + 1));
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return "$tableName.$columnName";
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} else if(($index = stripos($col, " as ")) !== FALSE) {
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$columnName = $this->columnName(trim(substr($col, 0, $index)));
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$alias = $this->columnName(trim(substr($col, $index + 4)));
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return "$columnName as $alias";
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} else {
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return "\"$col\"";
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}
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}
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}
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// Special Keywords and functions
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public function currentTimestamp() {
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return new Keyword("CURRENT_TIMESTAMP");
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}
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}
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?>
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