web-base/core/Driver/SQL/Query/Select.class.php
2021-04-08 18:29:47 +02:00

140 lines
4.2 KiB
PHP

<?php
namespace Driver\SQL\Query;
use Driver\SQL\Condition\CondOr;
use Driver\SQL\Join;
use Driver\SQL\SQL;
class Select extends Query {
private array $columns;
private array $tables;
private array $conditions;
private array $joins;
private array $orderColumns;
private array $groupColumns;
private bool $sortAscending;
private int $limit;
private int $offset;
public function __construct($sql, ...$columns) {
parent::__construct($sql);
$this->columns = (!empty($columns) && is_array($columns[0])) ? $columns[0] : $columns;
$this->tables = array();
$this->conditions = array();
$this->joins = array();
$this->orderColumns = array();
$this->groupColumns = array();
$this->limit = 0;
$this->offset = 0;
$this->sortAscending = true;
}
public function from(...$tables): Select {
$this->tables = array_merge($this->tables, $tables);
return $this;
}
public function where(...$conditions): Select {
$this->conditions[] = (count($conditions) === 1 ? $conditions : new CondOr($conditions));
return $this;
}
public function innerJoin(string $table, string $columnA, string $columnB, ?string $tableAlias = null): Select {
$this->joins[] = new Join("INNER", $table, $columnA, $columnB, $tableAlias);
return $this;
}
public function leftJoin(string $table, string $columnA, string $columnB, ?string $tableAlias = null): Select {
$this->joins[] = new Join("LEFT", $table, $columnA, $columnB, $tableAlias);
return $this;
}
public function groupBy(...$columns): Select {
$this->groupColumns = $columns;
return $this;
}
public function orderBy(...$columns): Select {
$this->orderColumns = $columns;
return $this;
}
public function ascending(): Select {
$this->sortAscending = true;
return $this;
}
public function descending(): Select {
$this->sortAscending = false;
return $this;
}
public function limit(int $limit): Select {
$this->limit = $limit;
return $this;
}
public function offset(int $offset): Select {
$this->offset = $offset;
return $this;
}
public function execute() {
return $this->sql->executeQuery($this, true);
}
public function getColumns(): array { return $this->columns; }
public function getTables(): array { return $this->tables; }
public function getConditions(): array { return $this->conditions; }
public function getJoins(): array { return $this->joins; }
public function isOrderedAscending(): bool { return $this->sortAscending; }
public function getOrderBy(): array { return $this->orderColumns; }
public function getLimit(): int { return $this->limit; }
public function getOffset(): int { return $this->offset; }
public function getGroupBy(): array { return $this->groupColumns; }
public function build(array &$params, Query $context = NULL): ?string {
$columns = $this->sql->columnName($this->getColumns());
$tables = $this->getTables();
if (!$tables) {
return "SELECT $columns";
}
$tables = $this->sql->tableName($tables);
$where = $this->sql->getWhereClause($this->getConditions(), $params);
$joinStr = "";
$joins = $this->getJoins();
if (!empty($joins)) {
foreach ($joins as $join) {
$type = $join->getType();
$joinTable = $this->sql->tableName($join->getTable());
$columnA = $this->sql->columnName($join->getColumnA());
$columnB = $this->sql->columnName($join->getColumnB());
$tableAlias = ($join->getTableAlias() ? " " . $join->getTableAlias() : "");
$joinStr .= " $type JOIN $joinTable$tableAlias ON $columnA=$columnB";
}
}
$groupBy = "";
$groupColumns = $this->getGroupBy();
if (!empty($groupColumns)) {
$groupBy = " GROUP BY " . $this->sql->columnName($groupColumns);
}
$orderBy = "";
$orderColumns = $this->getOrderBy();
if (!empty($orderColumns)) {
$orderBy = " ORDER BY " . $this->sql->columnName($orderColumns);
$orderBy .= ($this->isOrderedAscending() ? " ASC" : " DESC");
}
$limit = ($this->getLimit() > 0 ? (" LIMIT " . $this->getLimit()) : "");
$offset = ($this->getOffset() > 0 ? (" OFFSET " . $this->getOffset()) : "");
return "SELECT $columns FROM $tables$joinStr$where$groupBy$orderBy$limit$offset";
}
}