179 lines
5.8 KiB
PHP
179 lines
5.8 KiB
PHP
<?php
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namespace Driver\SQL\Query;
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use Driver\SQL\Condition\CondOr;
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use Driver\SQL\Expression\JsonArrayAgg;
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use Driver\SQL\Join;
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use Driver\SQL\SQL;
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class Select extends Query {
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private array $selectValues;
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private array $tables;
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private array $conditions;
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private array $joins;
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private array $orderColumns;
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private array $groupColumns;
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private bool $sortAscending;
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private int $limit;
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private int $offset;
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public function __construct($sql, ...$selectValues) {
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parent::__construct($sql);
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$this->selectValues = (!empty($selectValues) && is_array($selectValues[0])) ? $selectValues[0] : $selectValues;
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$this->tables = array();
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$this->conditions = array();
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$this->havings = array();
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$this->joins = array();
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$this->orderColumns = array();
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$this->groupColumns = array();
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$this->limit = 0;
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$this->offset = 0;
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$this->sortAscending = true;
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}
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public function from(...$tables): Select {
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$this->tables = array_merge($this->tables, $tables);
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return $this;
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}
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public function where(...$conditions): Select {
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$this->conditions[] = (count($conditions) === 1 ? $conditions : new CondOr($conditions));
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return $this;
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}
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public function having(...$conditions): Select {
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$this->havings[] = (count($conditions) === 1 ? $conditions : new CondOr($conditions));
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return $this;
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}
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public function innerJoin(string $table, string $columnA, string $columnB, ?string $tableAlias = null, array $conditions = []): Select {
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$this->joins[] = new Join("INNER", $table, $columnA, $columnB, $tableAlias, $conditions);
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return $this;
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}
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public function leftJoin(string $table, string $columnA, string $columnB, ?string $tableAlias = null, array $conditions = []): Select {
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$this->joins[] = new Join("LEFT", $table, $columnA, $columnB, $tableAlias, $conditions);
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return $this;
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}
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public function groupBy(...$columns): Select {
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$this->groupColumns = $columns;
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return $this;
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}
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public function orderBy(...$columns): Select {
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$this->orderColumns = $columns;
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return $this;
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}
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public function ascending(): Select {
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$this->sortAscending = true;
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return $this;
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}
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public function descending(): Select {
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$this->sortAscending = false;
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return $this;
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}
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public function limit(int $limit): Select {
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$this->limit = $limit;
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return $this;
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}
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public function offset(int $offset): Select {
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$this->offset = $offset;
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return $this;
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}
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public function execute() {
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return $this->sql->executeQuery($this, true);
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}
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public function getSelectValues(): array { return $this->selectValues; }
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public function getTables(): array { return $this->tables; }
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public function getConditions(): array { return $this->conditions; }
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public function getJoins(): array { return $this->joins; }
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public function isOrderedAscending(): bool { return $this->sortAscending; }
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public function getOrderBy(): array { return $this->orderColumns; }
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public function getLimit(): int { return $this->limit; }
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public function getOffset(): int { return $this->offset; }
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public function getGroupBy(): array { return $this->groupColumns; }
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public function getHavings(): array { return $this->havings; }
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public function build(array &$params): ?string {
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$selectValues = [];
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foreach ($this->selectValues as $value) {
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if (is_string($value)) {
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$selectValues[] = $this->sql->columnName($value);
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} else if ($value instanceof Select) {
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$subSelect = $value->build($params);
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if (count($value->getSelectValues()) !== 1) {
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$selectValues[] = "($subSelect)";
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} else {
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$columnAlias = null;
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$subSelectColumn = $value->getSelectValues()[0];
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if (is_string($subSelectColumn) && ($index = stripos($subSelectColumn, " as ")) !== FALSE) {
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$columnAlias = substr($subSelectColumn, $index + 4);
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} else if ($subSelectColumn instanceof JsonArrayAgg) {
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$columnAlias = $subSelectColumn->getAlias();
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}
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if ($columnAlias) {
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$selectValues[] = "($subSelect) as $columnAlias";
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} else {
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$selectValues[] = "($subSelect)";
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}
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}
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} else {
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$selectValues[] = $this->sql->addValue($value, $params);
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}
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}
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$tables = $this->getTables();
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$selectValues = implode(",", $selectValues);
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if (!$tables) {
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return "SELECT $selectValues";
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}
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$tables = $this->sql->tableName($tables);
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$where = $this->sql->getWhereClause($this->getConditions(), $params);
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$havingClause = "";
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if (count($this->havings) > 0) {
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$havingClause = " HAVING " . $this->sql->buildCondition($this->getHavings(), $params);
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}
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$joinStr = "";
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$joins = $this->getJoins();
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if (!empty($joins)) {
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foreach ($joins as $join) {
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$type = $join->getType();
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$joinTable = $this->sql->tableName($join->getTable());
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$tableAlias = ($join->getTableAlias() ? " " . $join->getTableAlias() : "");
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$condition = $this->sql->buildCondition($join->getConditions(), $params);
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$joinStr .= " $type JOIN $joinTable$tableAlias ON ($condition)";
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}
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}
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$groupBy = "";
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$groupColumns = $this->getGroupBy();
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if (!empty($groupColumns)) {
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$groupBy = " GROUP BY " . $this->sql->columnName($groupColumns);
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}
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$orderBy = "";
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$orderColumns = $this->getOrderBy();
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if (!empty($orderColumns)) {
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$orderBy = " ORDER BY " . $this->sql->columnName($orderColumns);
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$orderBy .= ($this->isOrderedAscending() ? " ASC" : " DESC");
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}
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$limit = ($this->getLimit() > 0 ? (" LIMIT " . $this->getLimit()) : "");
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$offset = ($this->getOffset() > 0 ? (" OFFSET " . $this->getOffset()) : "");
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return "SELECT $selectValues FROM $tables$joinStr$where$groupBy$havingClause$orderBy$limit$offset";
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}
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} |