/**
* Expression constructor.
* @param PixelDb $db
* @param string $column Column to order.
* @param string $direction The direction of the order.
* @param bool $first True if its the first order by expression.
*/
public function __construct(PixelDb $db, $column, $direction = self::ORDER_DIRECTION_ASCENDING, $first = true)
{
parent::__construct($db);
if ($first) {
$db->getSqlBuffer()->append(' ORDER BY ');
} else {
$db->getSqlBuffer()->append(', ');
}
$db->getSqlBuffer()->append($column . ' ' . $direction);
}
/**
* SelectExpression constructor.
* @param PixelDb $db
* @param string[] $fields List of fields to select.
* @param string $prefix Prefix for the fields. Useful for full field name.
* @param bool $first True to include SELECT FROM.
*/
public function __construct(PixelDb $db, $fields, $prefix = '', $first = true)
{
parent::__construct($db);
if ($first) {
$db->getSqlBuffer()->append('SELECT ');
} else {
$db->getSqlBuffer()->append(', ');
}
if ($prefix != '') {
$prefixedFields = [];
foreach ($fields as $field) {
array_push($prefixedFields, $prefix . $field);
}
$db->getSqlBuffer()->append(join(', ', $prefixedFields));
} else {
$db->getSqlBuffer()->append(join(', ', $fields));
}
}
/**
* Expression constructor.
* @param PixelDb $db
* @param string[] $mappings Mapping of the fields and its values. e.g. ['user_id'=>$userId]
* @param string $function Function for the mappings.
* @param string $mappingPrefix Prefix for the mapping to prevent conflicts.
* @param bool $first
*/
public function __construct(PixelDb $db, $mappings, $function = null, $mappingPrefix = 'p_', $first = true)
{
parent::__construct($db);
if ($first) {
$db->getSqlBuffer()->append(' SET ');
} else {
$db->getSqlBuffer()->append(', ');
}
$parameterString = '';
if ($function != null) {
foreach ($mappings as $map => $value) {
$parameterString .= $map . ' = ' . $function . '(:' . $mappingPrefix . $map . '), ';
}
} else {
foreach ($mappings as $map => $value) {
$parameterString .= $map . ' = :' . $mappingPrefix . $map . ', ';
}
}
$parameterString = rtrim($parameterString, ', ');
$db->getSqlBuffer()->append($parameterString);
$db->addParameter($mappings, $mappingPrefix);
}
/**
* Expression constructor.
* @param PixelDb $db
* @param string $column The column to compare.
* @param string $value The value expected.
* @param string $function Function that should be applied to the value.
* @param string $operator Operator for the comparison, use WhereExpression::OPERATOR_
* @param string $prefix Prefix for parameter.
* @param string $join The join used to combine multiple where expression.
*/
public function __construct(PixelDb $db, $column, $value, $function = null, $operator = WhereExpression::OPERATOR_EQ, $prefix = 'p_', $join = ' WHERE ')
{
parent::__construct($db);
$db->getSqlBuffer()->append($join);
if ($function == null) {
switch ($operator) {
case WhereExpression::OPERATOR_LIKE_STARTS:
$db->getSqlBuffer()->append($column . ' LIKE %:' . $prefix . $column);
break;
case WhereExpression::OPERATOR_LIKE_ENDS:
$db->getSqlBuffer()->append($column . ' LIKE :' . $prefix . $column . '%');
break;
case WhereExpression::OPERATOR_LIKE:
$db->getSqlBuffer()->append($column . ' LIKE %:' . $prefix . $column . '%');
break;
default:
$db->getSqlBuffer()->append($column . ' ' . $operator . ' :' . $prefix . $column);
break;
}
} else {
switch ($operator) {
case WhereExpression::OPERATOR_LIKE_STARTS:
$db->getSqlBuffer()->append($column . ' LIKE %' . $function . '(:' . $prefix . $column . ')');
break;
case WhereExpression::OPERATOR_LIKE_ENDS:
$db->getSqlBuffer()->append($column . ' LIKE ' . $function . '(:' . $prefix . $column . ')%');
break;
case WhereExpression::OPERATOR_LIKE:
$db->getSqlBuffer()->append($column . ' LIKE %' . $function . '(:' . $prefix . $column . ')%');
break;
default:
$db->getSqlBuffer()->append($column . ' ' . $operator . ' ' . $function . '(:' . $prefix . $column . ')');
break;
}
}
$db->addParameter([$column => $value], $prefix);
}
/**
* FromExpression constructor.
* @param \Myriatek\PixelDb\PixelDb $db
* @param string[] $tables Name of the table.
* @param bool $first True if the first from statement.
*/
public function __construct(PixelDb $db, $tables, $first = true)
{
parent::__construct($db);
$db->getSqlBuffer()->append(' FROM ' . join(', ', $tables));
}
/**
* Expression constructor.
* @param PixelDb $db
* @param string $tables Table to update.
*/
public function __construct(PixelDb $db, $tables)
{
parent::__construct($db);
$db->getSqlBuffer()->append('UPDATE ' . $tables);
}
/**
* Expression constructor.
* @param PixelDb $db
* @param int $start Limit start.
* @param int $end Limit length.
*/
public function __construct(PixelDb $db, $start, $end = 1)
{
parent::__construct($db);
$db->getSqlBuffer()->append(' LIMIT ' . $start . ', ' . $end);
}