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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Db\Sql; |
| 16 | |
| 17 | /** |
| 18 | * Json Extract expression class |
| 19 | * |
| 20 | * @category Pop |
| 21 | * @package Pop\Db |
| 22 | * @author Nick Sagona, III <nick@popphp.org> |
| 23 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 24 | * @license https://www.popphp.org/license New BSD License |
| 25 | * @version 7.0.0 |
| 26 | */ |
| 27 | class JsonExtract |
| 28 | { |
| 29 | |
| 30 | /** |
| 31 | * The rendered, dialect-specific extraction expression |
| 32 | * @var string |
| 33 | */ |
| 34 | protected string $rendered; |
| 35 | |
| 36 | /** |
| 37 | * Constructor |
| 38 | * |
| 39 | * Instantiate the JSON extract expression object. Renders immediately - this object is |
| 40 | * immutable once built, unlike Select, whose state can still change after construction. |
| 41 | * |
| 42 | * @param AbstractSql $sql |
| 43 | * @param string $column |
| 44 | * @param string $path |
| 45 | * @throws Exception |
| 46 | */ |
| 47 | public function __construct(AbstractSql $sql, string $column, string $path) |
| 48 | { |
| 49 | if ($sql->isMysql()) { |
| 50 | $this->rendered = 'JSON_UNQUOTE(JSON_EXTRACT(' . $sql->quoteId($column) . ', ' . $sql->quote($path) . '))'; |
| 51 | } else if ($sql->isPgsql()) { |
| 52 | $segments = self::parsePathSegments($path); |
| 53 | if (count($segments) <= 1) { |
| 54 | $key = (count($segments) === 1) ? $segments[0] : ''; |
| 55 | $this->rendered = $sql->quoteId($column) . '->>' . $sql->quote($key); |
| 56 | } else { |
| 57 | $this->rendered = $sql->quoteId($column) . '#>>' . $sql->quote('{' . implode(',', $segments) . '}'); |
| 58 | } |
| 59 | } else if ($sql->isSqlite()) { |
| 60 | $this->rendered = 'json_extract(' . $sql->quoteId($column) . ', ' . $sql->quote($path) . ')'; |
| 61 | } else if ($sql->isSqlsrv()) { |
| 62 | $this->rendered = 'JSON_VALUE(' . $sql->quoteId($column) . ', ' . $sql->quote($path) . ')'; |
| 63 | } else { |
| 64 | throw new Exception('Error: Unsupported database type for JSON extraction.'); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Parse a MySQL-style JSONPath string ('$.foo.bar', '$.tags[0]') into an ordered list of |
| 70 | * path segments ('foo', 'bar' / 'tags', '0'), for dialects (PostgreSQL) that address by |
| 71 | * segment array rather than JSONPath syntax directly |
| 72 | * |
| 73 | * @param string $path |
| 74 | * @return array |
| 75 | */ |
| 76 | public static function parsePathSegments(string $path): array |
| 77 | { |
| 78 | $path = ltrim($path, '$'); |
| 79 | $path = preg_replace('/\[(\d+)\]/', '.$1', $path); |
| 80 | $path = trim($path, '.'); |
| 81 | |
| 82 | return ($path === '') ? [] : explode('.', $path); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Render the expression string |
| 87 | * |
| 88 | * @return string |
| 89 | */ |
| 90 | public function __toString(): string |
| 91 | { |
| 92 | return $this->rendered; |
| 93 | } |
| 94 | |
| 95 | } |