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| 1 | <?php |
| 2 | |
| 3 | namespace pvc\html\attribute; |
| 4 | |
| 5 | use pvc\html\err\InvalidAttributeValueException; |
| 6 | use pvc\html\err\UnsetAttributeValueException; |
| 7 | use pvc\interfaces\html\attribute\AttributeWithValueInterface; |
| 8 | use pvc\interfaces\html\attribute\DataType; |
| 9 | use pvc\interfaces\validator\ValTesterInterface; |
| 10 | use pvc\validator\val_tester\null_empty\IsNotEmptyTester; |
| 11 | |
| 12 | /** |
| 13 | * @phpstan-import-type ValueType from AttributeWithValueInterface |
| 14 | */ |
| 15 | abstract class AttributeWithValue extends Attribute |
| 16 | { |
| 17 | /** |
| 18 | * @var DataType |
| 19 | */ |
| 20 | protected DataType $dataType; |
| 21 | |
| 22 | /** |
| 23 | * @var bool |
| 24 | * many (most?) attributes values are not case-sensitive, but some are. A good example is the 'id' |
| 25 | * attribute. |
| 26 | */ |
| 27 | protected bool $isCaseSensitive; |
| 28 | |
| 29 | |
| 30 | /** |
| 31 | * @var ValTesterInterface<ValueType> |
| 32 | * |
| 33 | * Attributes usually accept values whose validity can be determined in a context free manner. But there |
| 34 | * are a few values which are context-sensitive. For example, the 'for' attribute has value(s) which are id(s) |
| 35 | * of other elements within the same structural block. The ValTester object is a context free tester, because |
| 36 | * it knows nothing about other attributes and elements which are outside its own scope. |
| 37 | */ |
| 38 | protected ValTesterInterface $tester; |
| 39 | |
| 40 | /** |
| 41 | * @var array<ValueType> |
| 42 | * multivalued attributes and custom attributes can have more than one |
| 43 | * parameter. All values are stored in array for all attribute types. For |
| 44 | * singlevalued attributes and void attributes, the length of the array is 1. |
| 45 | */ |
| 46 | protected array $values; |
| 47 | |
| 48 | /** |
| 49 | * @param string $name |
| 50 | * @param DataType $dataType |
| 51 | * @param bool $caseSensitive |
| 52 | * @param ValTesterInterface<ValueType>|null $tester |
| 53 | */ |
| 54 | public function __construct( |
| 55 | string $name, |
| 56 | DataType $dataType, |
| 57 | ?bool $caseSensitive = null, |
| 58 | ?ValTesterInterface $tester = null, |
| 59 | ) { |
| 60 | parent::__construct($name); |
| 61 | $this->dataType = $dataType; |
| 62 | $this->isCaseSensitive = $caseSensitive ?? false; |
| 63 | $this->tester = $tester ?? new IsNotEmptyTester(); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * @param array<ValueType> $values |
| 68 | * |
| 69 | * @return void |
| 70 | * |
| 71 | * all attributes must have a value (void attributes have a value of |
| 72 | * true) if they are to be rendered. Subclasses for single-valued and |
| 73 | * void attributes confirm the parameter count is exactly 1. |
| 74 | */ |
| 75 | abstract protected function confirmParameterCount(array $values): void; |
| 76 | |
| 77 | /** |
| 78 | * @return array<ValueType>|ValueType|null |
| 79 | * |
| 80 | * most attributes are single-valued. Keeping the getter in this class makes |
| 81 | * testing the abstract class easier (at the moment). It is overridden |
| 82 | * in the multivalued attribute class. |
| 83 | */ |
| 84 | public function getValue() |
| 85 | { |
| 86 | return $this->values[0] ?? null; |
| 87 | } |
| 88 | /** |
| 89 | * @param ValueType ...$values |
| 90 | * |
| 91 | * @return void |
| 92 | * @throws InvalidAttributeValueException |
| 93 | */ |
| 94 | public function setValue(...$values): void |
| 95 | { |
| 96 | /** |
| 97 | * confirm the parameter count. |
| 98 | */ |
| 99 | $this->confirmParameterCount($values); |
| 100 | |
| 101 | /** |
| 102 | * confirm the data type and value. String values are potentially subject |
| 103 | * to case conversion, so build a new array of (possibly case-converted) |
| 104 | * values before setting the $value attribute in this object |
| 105 | */ |
| 106 | $newValues = []; |
| 107 | |
| 108 | $callback = match ($this->dataType) { |
| 109 | DataType::Integer => 'is_integer', |
| 110 | DataType::String => 'is_string', |
| 111 | }; |
| 112 | |
| 113 | foreach ($values as $value) { |
| 114 | |
| 115 | if (!$callback($value)) { |
| 116 | throw new InvalidAttributeValueException($this->name, $value); |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * if the value is not case-sensitive, set it to lower case |
| 121 | */ |
| 122 | if (is_string($value) && !$this->isCaseSensitive) { |
| 123 | $value = strtolower($value); |
| 124 | } |
| 125 | /** |
| 126 | * value must be validated by the tester. |
| 127 | */ |
| 128 | if (!$this->tester->testValue($value)) { |
| 129 | throw new InvalidAttributeValueException($this->getName(), $value); |
| 130 | } |
| 131 | $newValues[] = $value; |
| 132 | } |
| 133 | $this->values = $newValues; |
| 134 | } |
| 135 | /** |
| 136 | * @return string |
| 137 | */ |
| 138 | function render(): string |
| 139 | { |
| 140 | if (null === $this->getValue()) { |
| 141 | throw new UnsetAttributeValueException($this->getName()); |
| 142 | } |
| 143 | return $this->name . '=\'' . implode(' ', $this->values) . '\''; |
| 144 | } |
| 145 | } |