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| 1 | <?php declare(strict_types=1); |
| 2 | /* |
| 3 | * This file is part of Aplus Framework Database Library. |
| 4 | * |
| 5 | * (c) Natan Felles <natanfelles@gmail.com> |
| 6 | * |
| 7 | * For the full copyright and license information, please view the LICENSE |
| 8 | * file that was distributed with this source code. |
| 9 | */ |
| 10 | namespace Framework\Database\Manipulation; |
| 11 | |
| 12 | use Closure; |
| 13 | use InvalidArgumentException; |
| 14 | |
| 15 | /** |
| 16 | * Class Statement. |
| 17 | * |
| 18 | * @see https://mariadb.com/kb/en/data-manipulation/ |
| 19 | * |
| 20 | * @package database |
| 21 | */ |
| 22 | abstract class Statement extends \Framework\Database\Statement |
| 23 | { |
| 24 | /** |
| 25 | * Sets the statement options. |
| 26 | * |
| 27 | * @param string $option One of the OPT_* constants |
| 28 | * @param string ...$options Each option value must be one of the OPT_* constants |
| 29 | * |
| 30 | * @return static |
| 31 | */ |
| 32 | public function options(string $option, string ...$options) : static |
| 33 | { |
| 34 | $this->sql['options'] = []; |
| 35 | foreach ([$option, ...$options] as $option) { |
| 36 | $this->sql['options'][] = $option; |
| 37 | } |
| 38 | return $this; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Tells if the statement has options set. |
| 43 | * |
| 44 | * @return bool |
| 45 | */ |
| 46 | protected function hasOptions() : bool |
| 47 | { |
| 48 | return isset($this->sql['options']); |
| 49 | } |
| 50 | |
| 51 | abstract protected function renderOptions() : ?string; |
| 52 | |
| 53 | /** |
| 54 | * Returns an SQL part between parentheses. |
| 55 | * |
| 56 | * @param Closure $subquery A {@see Closure} having the current Manipulation |
| 57 | * instance as first argument. The returned value must be scalar |
| 58 | * |
| 59 | * @see https://mariadb.com/kb/en/subqueries/ |
| 60 | * @see https://mariadb.com/kb/en/built-in-functions/ |
| 61 | * |
| 62 | * @return string |
| 63 | */ |
| 64 | protected function subquery(Closure $subquery) : string |
| 65 | { |
| 66 | return '(' . $subquery($this->database) . ')'; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Sets the LIMIT clause. |
| 71 | * |
| 72 | * @param int $limit |
| 73 | * @param int|null $offset |
| 74 | * |
| 75 | * @see https://mariadb.com/kb/en/limit/ |
| 76 | * |
| 77 | * @return static |
| 78 | */ |
| 79 | protected function setLimit(int $limit, int $offset = null) : static |
| 80 | { |
| 81 | $this->sql['limit'] = [ |
| 82 | 'limit' => $limit, |
| 83 | 'offset' => $offset, |
| 84 | ]; |
| 85 | return $this; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Renders the LIMIT clause. |
| 90 | * |
| 91 | * @return string|null |
| 92 | */ |
| 93 | protected function renderLimit() : ?string |
| 94 | { |
| 95 | if ( ! isset($this->sql['limit'])) { |
| 96 | return null; |
| 97 | } |
| 98 | if ($this->sql['limit']['limit'] < 1) { |
| 99 | throw new InvalidArgumentException('LIMIT must be greater than 0'); |
| 100 | } |
| 101 | $offset = $this->sql['limit']['offset']; |
| 102 | if ($offset !== null) { |
| 103 | if ($offset < 1) { |
| 104 | throw new InvalidArgumentException('LIMIT OFFSET must be greater than 0'); |
| 105 | } |
| 106 | $offset = " OFFSET {$this->sql['limit']['offset']}"; |
| 107 | } |
| 108 | return " LIMIT {$this->sql['limit']['limit']}{$offset}"; |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Renders a column part. |
| 113 | * |
| 114 | * @param Closure|string $column The column name or a subquery |
| 115 | * |
| 116 | * @return string |
| 117 | */ |
| 118 | protected function renderIdentifier(Closure | string $column) : string |
| 119 | { |
| 120 | return $column instanceof Closure |
| 121 | ? $this->subquery($column) |
| 122 | : $this->database->protectIdentifier($column); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Renders a column part with an optional alias name, AS clause. |
| 127 | * |
| 128 | * @param array<string,Closure|string>|Closure|string $column The column name, |
| 129 | * a subquery or an array where the index is the alias and the value is the column/subquery |
| 130 | * |
| 131 | * @return string |
| 132 | */ |
| 133 | protected function renderAliasedIdentifier(array | Closure | string $column) : string |
| 134 | { |
| 135 | if (\is_array($column)) { |
| 136 | if (\count($column) !== 1) { |
| 137 | throw new InvalidArgumentException('Aliased column must have only 1 key'); |
| 138 | } |
| 139 | $alias = (string) \array_key_first($column); |
| 140 | return $this->renderIdentifier($column[$alias]) . ' AS ' |
| 141 | . $this->database->protectIdentifier($alias); |
| 142 | } |
| 143 | return $this->renderIdentifier($column); |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Renders a subquery or quote a value. |
| 148 | * |
| 149 | * @param Closure|float|int|string|null $value A {@see Closure} for |
| 150 | * subquery, other types to quote |
| 151 | * |
| 152 | * @return float|int|string |
| 153 | */ |
| 154 | protected function renderValue(Closure | float | int | string | null $value) : float | int | string |
| 155 | { |
| 156 | return $value instanceof Closure |
| 157 | ? $this->subquery($value) |
| 158 | : $this->database->quote($value); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Renders an assignment part. |
| 163 | * |
| 164 | * @param string $identifier Identifier/column name |
| 165 | * @param Closure|float|int|string|null $expression Expression/value |
| 166 | * |
| 167 | * @see Statement::renderValue() |
| 168 | * @see https://mariadb.com/kb/en/assignment-operators-assignment-operator/ |
| 169 | * |
| 170 | * @return string |
| 171 | */ |
| 172 | protected function renderAssignment( |
| 173 | string $identifier, |
| 174 | Closure | float | int | string | null $expression |
| 175 | ) : string { |
| 176 | return $this->database->protectIdentifier($identifier) |
| 177 | . ' = ' . $this->renderValue($expression); |
| 178 | } |
| 179 | } |