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<?php |
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namespace App\Models; |
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use App\Factories\SmartPlaylistRuleParameterFactory; |
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use Illuminate\Database\Eloquent\Builder; |
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use InvalidArgumentException; |
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class Rule |
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{ |
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public const OPERATOR_IS = 'is'; |
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public const OPERATOR_IS_NOT = 'isNot'; |
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public const OPERATOR_CONTAINS = 'contains'; |
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public const OPERATOR_NOT_CONTAIN = 'notContain'; |
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public const OPERATOR_IS_BETWEEN = 'isBetween'; |
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public const OPERATOR_IS_GREATER_THAN = 'isGreaterThan'; |
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public const OPERATOR_IS_LESS_THAN = 'isLessThan'; |
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public const OPERATOR_BEGINS_WITH = 'beginsWith'; |
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public const OPERATOR_ENDS_WITH = 'endsWith'; |
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public const OPERATOR_IN_LAST = 'inLast'; |
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public const OPERATOR_NOT_IN_LAST = 'notInLast'; |
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public const VALID_OPERATORS = [ |
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self::OPERATOR_BEGINS_WITH, |
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self::OPERATOR_CONTAINS, |
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self::OPERATOR_ENDS_WITH, |
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self::OPERATOR_IN_LAST, |
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self::OPERATOR_IS, |
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self::OPERATOR_IS_BETWEEN, |
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self::OPERATOR_IS_GREATER_THAN, |
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self::OPERATOR_IS_LESS_THAN, |
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self::OPERATOR_IS_NOT, |
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self::OPERATOR_NOT_CONTAIN, |
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self::OPERATOR_NOT_IN_LAST, |
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]; |
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private $operator; |
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private $value; |
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private $model; |
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private $parameterFactory; |
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private function __construct(array $config) |
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{ |
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$this->validateOperator($config['operator']); |
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$this->value = $config['value']; |
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$this->model = $config['model']; |
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$this->operator = $config['operator']; |
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$this->parameterFactory = new SmartPlaylistRuleParameterFactory(); |
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} |
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public static function create(array $config): self |
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{ |
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return new static($config); |
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} |
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public function build(Builder $query, ?string $model = null): Builder |
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{ |
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if (!$model) { |
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$model = $this->model; |
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} |
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$fragments = explode('.', $model, 2); |
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if (count($fragments) === 1) { |
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return $query->{$this->resolveLogic()}( |
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...$this->parameterFactory->createParameters($model, $this->operator, $this->value) |
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); |
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} |
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// If the model is something like 'artist.name' or 'interactions.play_count', we have a subquery to deal with. |
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// We handle such a case with a recursive call which, in theory, should work with an unlimited level of nesting, |
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// though in practice we only have one level max. |
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return $query->whereHas($fragments[0], function (Builder $subQuery) use ($fragments): Builder { |
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return $this->build($subQuery, $fragments[1]); |
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}); |
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} |
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/** |
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* Resolve the logic of a (sub)query base on the configured operator. |
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* Basically, if the operator is "between," we use "whereBetween." Otherwise, it's "where." Simple. |
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*/ |
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private function resolveLogic(): string |
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{ |
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return $this->operator === self::OPERATOR_IS_BETWEEN ? 'whereBetween' : 'where'; |
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} |
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private function validateOperator(string $operator): void |
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{ |
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if (!in_array($operator, self::VALID_OPERATORS, true)) { |
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throw new InvalidArgumentException( |
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sprintf( |
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'%s is not a valid value for operators. Valid values are: %s', |
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$operator, |
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implode(', ', self::VALID_OPERATORS) |
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) |
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); |
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} |
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} |
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} |
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phanan /
koel
