web-base/core/Driver/SQL/MySQL.class.php

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<?php
namespace Driver\SQL;
use \Api\Parameter\Parameter;
use \Driver\SQL\Column\Column;
use \Driver\SQL\Column\IntColumn;
use \Driver\SQL\Column\SerialColumn;
use \Driver\SQL\Column\StringColumn;
use \Driver\SQL\Column\EnumColumn;
use \Driver\SQL\Column\DateTimeColumn;
use Driver\SQL\Column\BoolColumn;
use Driver\SQL\Column\JsonColumn;
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use Driver\SQL\Condition\CondRegex;
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use Driver\SQL\Expression\Add;
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use Driver\SQL\Strategy\Strategy;
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use \Driver\SQL\Strategy\UpdateStrategy;
class MySQL extends SQL {
public function __construct($connectionData) {
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parent::__construct($connectionData);
}
public function checkRequirements() {
return function_exists('mysqli_connect');
}
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public function getDriverName() {
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return 'mysqli';
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}
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// Connection Management
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public function connect() {
if(!is_null($this->connection)) {
return true;
}
@$this->connection = mysqli_connect(
$this->connectionData->getHost(),
$this->connectionData->getLogin(),
$this->connectionData->getPassword(),
$this->connectionData->getProperty('database'),
$this->connectionData->getPort()
);
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if (mysqli_connect_errno()) {
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$this->lastError = "Failed to connect to MySQL: " . mysqli_connect_error();
$this->connection = NULL;
return false;
}
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mysqli_set_charset($this->connection, $this->connectionData->getProperty('encoding', 'UTF-8'));
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return true;
}
public function disconnect() {
if(is_null($this->connection)) {
return true;
}
mysqli_close($this->connection);
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return true;
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}
public function getLastError() {
$lastError = parent::getLastError();
if (empty($lastError)) {
$lastError = mysqli_error($this->connection);
}
return $lastError;
}
private function getPreparedParams($values) {
$sqlParams = array('');
foreach($values as $value) {
$paramType = Parameter::parseType($value);
switch($paramType) {
case Parameter::TYPE_BOOLEAN:
$value = $value ? 1 : 0;
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$sqlParams[0] .= 'i';
break;
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case Parameter::TYPE_INT:
$sqlParams[0] .= 'i';
break;
case Parameter::TYPE_FLOAT:
$sqlParams[0] .= 'd';
break;
case Parameter::TYPE_DATE:
$value = $value->format('Y-m-d');
$sqlParams[0] .= 's';
break;
case Parameter::TYPE_TIME:
$value = $value->format('H:i:s');
$sqlParams[0] .= 's';
break;
case Parameter::TYPE_DATE_TIME:
$value = $value->format('Y-m-d H:i:s');
$sqlParams[0] .= 's';
break;
case Parameter::TYPE_EMAIL:
default:
$sqlParams[0] .= 's';
}
$sqlParams[] = $value;
}
return $sqlParams;
}
protected function execute($query, $values = NULL, $returnValues = false) {
$resultRows = array();
$this->lastError = "";
if (is_null($values) || empty($values)) {
$res = mysqli_query($this->connection, $query);
$success = $res !== FALSE;
if ($success && $returnValues) {
while($row = $res->fetch_assoc()) {
$resultRows[] = $row;
}
$res->close();
}
} else if($stmt = $this->connection->prepare($query)) {
$success = false;
$sqlParams = $this->getPreparedParams($values);
$tmp = array();
foreach($sqlParams as $key => $value) $tmp[$key] = &$sqlParams[$key];
if(call_user_func_array(array($stmt, "bind_param"), $tmp)) {
if($stmt->execute()) {
if ($returnValues) {
$res = $stmt->get_result();
if($res) {
while($row = $res->fetch_assoc()) {
$resultRows[] = $row;
}
$res->close();
$success = true;
} else {
$this->lastError = "PreparedStatement::get_result failed: $stmt->error ($stmt->errno)";
}
} else {
$success = true;
}
} else {
$this->lastError = "PreparedStatement::execute failed: $stmt->error ($stmt->errno)";
}
} else {
$this->lastError = "PreparedStatement::prepare failed: $stmt->error ($stmt->errno)";
}
$stmt->close();
} else {
$success = false;
}
return ($success && $returnValues) ? $resultRows : $success;
}
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protected function getOnDuplicateStrategy(?Strategy $strategy, &$params) {
if (is_null($strategy)) {
return "";
} else if ($strategy instanceof UpdateStrategy) {
$updateValues = array();
foreach($strategy->getValues() as $key => $value) {
$leftColumn = $this->columnName($key);
if ($value instanceof Column) {
$columnName = $this->columnName($value->getName());
$updateValues[] = "$leftColumn=$columnName";
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} else if($value instanceof Add) {
$columnName = $this->columnName($value->getColumn());
$operator = $value->getOperator();
$value = $value->getValue();
$updateValues[] = "$leftColumn=$columnName$operator" . $this->addValue($value, $params);
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} else {
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$updateValues[] = "$leftColumn=" . $this->addValue($value, $params);
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}
}
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return " ON DUPLICATE KEY UPDATE " . implode(",", $updateValues);
} else {
$strategyClass = get_class($strategy);
$this->lastError = "ON DUPLICATE Strategy $strategyClass is not supported yet.";
return false;
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}
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}
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protected function fetchReturning($res, string $returningCol) {
$this->lastInsertId = mysqli_insert_id($this->connection);
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}
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public function getColumnDefinition(Column $column) {
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$columnName = $this->columnName($column->getName());
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$defaultValue = $column->getDefaultValue();
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if ($column instanceof StringColumn) {
$maxSize = $column->getMaxSize();
if ($maxSize) {
$type = "VARCHAR($maxSize)";
} else {
$type = "TEXT";
}
} else if($column instanceof SerialColumn) {
$type = "INTEGER AUTO_INCREMENT";
} else if($column instanceof IntColumn) {
$type = "INTEGER";
} else if($column instanceof DateTimeColumn) {
$type = "DATETIME";
} else if($column instanceof EnumColumn) {
$values = array();
foreach($column->getValues() as $value) {
$values[] = $this->getValueDefinition($value);
}
$values = implode(",", $values);
$type = "ENUM($values)";
} else if($column instanceof BoolColumn) {
$type = "BOOLEAN";
} else if($column instanceof JsonColumn) {
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$type = "LONGTEXT"; # some maria db setups don't allow JSON here…
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$defaultValue = NULL; # must be null :(
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} else {
$this->lastError = "Unsupported Column Type: " . get_class($column);
return NULL;
}
$notNull = $column->notNull() ? " NOT NULL" : "";
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if (!is_null($defaultValue) || !$column->notNull()) {
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$defaultValue = " DEFAULT " . $this->getValueDefinition($column->getDefaultValue());
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} else {
$defaultValue = "";
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}
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return "$columnName $type$notNull$defaultValue";
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}
public function getValueDefinition($value) {
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if (is_numeric($value)) {
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return $value;
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} else if(is_bool($value)) {
return $value ? "TRUE" : "FALSE";
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} else if(is_null($value)) {
return "NULL";
} else if($value instanceof Keyword) {
return $value->getValue();
} else {
$str = addslashes($value);
return "'$str'";
}
}
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protected function addValue($val, &$params) {
if ($val instanceof Keyword) {
return $val->getValue();
} else {
$params[] = $val;
return "?";
}
}
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protected function tableName($table) {
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if (is_array($table)) {
$tables = array();
foreach($table as $t) $tables[] = $this->tableName($t);
return implode(",", $tables);
} else {
return "`$table`";
}
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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)) {
$columns = array();
foreach($col as $c) $columns[] = $this->columnName($c);
return implode(",", $columns);
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} else {
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if (($index = strrpos($col, ".")) !== FALSE) {
$tableName = $this->tableName(substr($col, 0, $index));
$columnName = $this->columnName(substr($col, $index + 1));
return "$tableName.$columnName";
} else if(($index = stripos($col, " as ")) !== FALSE) {
$columnName = $this->columnName(trim(substr($col, 0, $index)));
$alias = trim(substr($col, $index + 4));
return "$columnName as $alias";
} else {
return "`$col`";
}
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}
}
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public function currentTimestamp() {
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return new Keyword("NOW()");
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}
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public function getStatus() {
return mysqli_stat($this->connection);
}
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}