264 lines
6.5 KiB
PHP

<?php
declare(strict_types=1);
/*
* Chill is a software for social workers
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace Chill\MainBundle\Search;
use function array_push;
use function count;
use function implode;
use function strtr;
/**
* This create a query optimized for searching for the api response.
*
* When build, this class generate a SQL string and a list of a parameters which is suitable for running
* a native SQL query. This have usually the form of
*
* `SELECT '<key>' as key, <metadata> as metadata, <pertinence> as pertinence FROM <from clause> WHERE <where clause>`.
*
* The clause between `<>` are provided through the dedicated method in this class (@link{self::setSelectKey},
* @link{self::setFromClause}), etc.).
*
*/
class SearchApiQuery
{
private ?string $fromClause = null;
private array $fromClauseParams = [];
private bool $isDistinct = false;
private ?string $isDistinctKey = null;
private ?string $jsonbMetadata = null;
private array $jsonbMetadataParams = [];
private ?string $pertinence = null;
private array $pertinenceParams = [];
private array $select = [];
private ?string $selectKey = null;
private array $selectKeyParams = [];
private array $selectParams = [];
private array $whereClauses = [];
private array $whereClausesParams = [];
public function addSelectClause(string $select, array $params = []): self
{
$this->select[] = $select;
$this->selectParams = [...$this->selectParams, ...$params];
return $this;
}
/**
* Add a where clause.
*
* This will add to previous where clauses with and `AND` join
*
* @return $this
*/
public function andWhereClause(string $whereClause, array $params = []): self
{
$this->whereClauses[] = $whereClause;
array_push($this->whereClausesParams, ...$params);
return $this;
}
public function buildParameters(bool $countOnly = false): array
{
if (!$countOnly) {
return [
...$this->buildSelectParams($countOnly),
...$this->fromClauseParams,
...$this->whereClausesParams,
];
}
return [
...$this->fromClauseParams,
...$this->whereClausesParams,
];
}
public function buildQuery(bool $countOnly = false): string
{
$isMultiple = count($this->whereClauses);
$where =
($isMultiple ? '(' : '') .
implode(
($isMultiple ? ')' : '') . ' AND ' . ($isMultiple ? '(' : ''),
$this->whereClauses
) .
($isMultiple ? ')' : '');
$select = $this->buildSelectClause($countOnly);
return strtr('SELECT
{select}
FROM {from}
WHERE {where}
', [
'{select}' => $select,
'{from}' => $this->fromClause,
'{where}' => $where,
]);
}
public function getDistinct(): bool
{
return $this->isDistinct;
}
public function getFromClause(): string
{
return $this->fromClause;
}
public function getFromParams(): array
{
return $this->fromClauseParams;
}
public function getSelectClauses(): array
{
return $this->select;
}
public function getSelectParams(): array
{
return $this->selectParams;
}
public function resetSelectClause(): self
{
$this->select = [];
$this->selectParams = [];
$this->selectKey = null;
$this->selectKeyParams = [];
$this->jsonbMetadata = null;
$this->jsonbMetadataParams = [];
$this->pertinence = null;
$this->pertinenceParams = [];
return $this;
}
public function setDistinct(bool $distinct, string $distinctKey): self
{
$this->isDistinct = $distinct;
$this->isDistinctKey = $distinctKey;
return $this;
}
public function setFromClause(string $fromClause, array $params = []): self
{
$this->fromClause = $fromClause;
$this->fromClauseParams = $params;
return $this;
}
public function setSelectJsonbMetadata(string $jsonbMetadata, array $params = []): self
{
$this->jsonbMetadata = $jsonbMetadata;
$this->jsonbMetadataParams = $params;
return $this;
}
public function setSelectKey(string $selectKey, array $params = []): self
{
$this->selectKey = $selectKey;
$this->selectKeyParams = $params;
return $this;
}
public function setSelectPertinence(string $pertinence, array $params = []): self
{
$this->pertinence = $pertinence;
$this->pertinenceParams = $params;
return $this;
}
/**
* Set the where clause and replace all existing ones.
*/
public function setWhereClauses(string $whereClause, array $params = []): self
{
$this->whereClauses = [$whereClause];
$this->whereClausesParams = $params;
return $this;
}
private function buildSelectClause(bool $countOnly = false): string
{
if ($countOnly) {
if (!$this->isDistinct) {
return 'count(*) AS c';
}
return 'count(distinct ' . $this->isDistinctKey . ') AS c';
}
$selects = $this->getSelectClauses();
if (null !== $this->selectKey) {
$selects[] = strtr("'{key}' AS key", ['{key}' => $this->selectKey]);
}
if (null !== $this->jsonbMetadata) {
$selects[] = strtr('{metadata} AS metadata', ['{metadata}' => $this->jsonbMetadata]);
}
if (null !== $this->pertinence) {
$selects[] = strtr('{pertinence} AS pertinence', ['{pertinence}' => $this->pertinence]);
}
return ($this->isDistinct ? 'DISTINCT ' : '') . implode(', ', $selects);
}
private function buildSelectParams(bool $count = false): array
{
if ($count) {
return [];
}
$args = $this->getSelectParams();
if (null !== $this->selectKey) {
$args = [...$args, ...$this->selectKeyParams];
}
if (null !== $this->jsonbMetadata) {
$args = [...$args, ...$this->jsonbMetadataParams];
}
if (null !== $this->pertinence) {
$args = [...$args, ...$this->pertinenceParams];
}
return $args;
}
}