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<?php |
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namespace HexMakina\Crudites\Grammar; |
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/** |
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* An abstract class representing a SQL predicate. |
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* Instantiate and __toString(). |
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* |
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* @package HexMakina\Crudites\Grammar\Query |
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*/ |
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class Predicate extends Grammar |
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{ |
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protected $left; |
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protected ?string $operator = null; |
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protected $right = null; |
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protected ?string $bind_label = null; |
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protected array $bindings = []; |
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/** |
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* Predicate constructor. |
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* The constructor takes a left side expression, an operator, and a right side expression. |
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* The left and right side expressions can be either strings or arrays. |
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* If an array is provided, the first element is the table name and the second element is the column name. |
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* The constructor also adds backticks to the column names. |
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* |
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* |
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* @param mixed $left, left side expression |
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* @param string $operator, operator to use |
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* @param mixed $right, right side expression |
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*/ |
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public function __construct($left, string $operator = null, $right = null) |
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{ |
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$this->left = $left; |
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$this->operator = $operator; |
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$this->right = $right; |
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} |
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/** |
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* Converts the predicate to a string. |
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* |
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* @return string The string representation of the predicate. |
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*/ |
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public function __toString() |
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{ |
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$left = is_array($this->left) ? self::identifier($this->left) : ($this->left ?? ''); |
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$right = is_array($this->right) ? self::identifier($this->right) : ($this->right ?? ''); |
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return trim(sprintf('%s %s %s', $left, $this->operator ?? '', $right)); |
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} |
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/** |
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* Gets the bindings for the predicate. |
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* |
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* @return array The bindings for the predicate. |
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*/ |
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public function bindings(): array |
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{ |
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return $this->bindings ?? []; |
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} |
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/** |
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* Gets the binding label for the predicate. |
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* |
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* @return string The binding label for the predicate. |
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*/ |
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public function bindLabel(string $prefix = null): string |
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{ |
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if($this->bind_label !== null) |
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return $this->bind_label; |
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if(is_string($this->right)) |
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$this->bind_label = $this->right; |
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else{ |
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$this->bind_label = is_array($this->left) ? implode('_', $this->left) : $this->left; |
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} |
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if($prefix !== null) |
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$this->bind_label = $prefix . '_' . $this->bind_label; |
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return $this->bind_label; |
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} |
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public function withValue($value, string $bind_prefix = null): self |
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{ |
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$this->bindings[$this->bindLabel($bind_prefix)] = $value; |
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$this->right = ':' . $this->bindLabel($bind_prefix); |
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return $this; |
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} |
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public function withValues(array $values, string $bind_prefix) |
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{ |
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if (empty($values)) { |
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throw new \InvalidArgumentException('PREDICATE_VALUES_ARE_EMPTY'); |
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} |
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$bind_label = $this->bindLabel($bind_prefix); |
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foreach ($values as $index => $val) { |
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$this->bindings[sprintf('%s_%d',$bind_label, $index)] = $val; |
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} |
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$this->operator = 'IN'; |
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$this->right = '(:' . implode(',:', array_keys($this->bindings)) . ')'; |
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return $this; |
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} |
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public function isNotEmpty(): self |
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{ |
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$res = is_array($this->left) ? self::identifier($this->left) : $this->left; |
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$this->left = sprintf("(%s IS NOT NULL AND %s <> '')", $res, $res); |
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$this->operator = null; |
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$this->right = null; |
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return $this; |
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} |
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public function isEmpty(): self |
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{ |
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$res = is_array($this->left) ? self::identifier($this->left) : $this->left; |
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$this->left = sprintf("(%s IS NULL OR %s = '')", $res, $res); |
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$this->operator = null; |
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$this->right = null; |
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return $this; |
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} |
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} |
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HexMakina /
Crudites
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