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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Boiler\Proxy; |
| 6 | |
| 7 | use Celema\Boiler\Exception\RuntimeException; |
| 8 | use ReflectionClass; |
| 9 | use ReflectionProperty; |
| 10 | use Stringable; |
| 11 | |
| 12 | /** |
| 13 | * Template access to a wrapped object: properties, methods, invocation, and |
| 14 | * string conversion, each wrapping what it returns. Shared by the proxies of |
| 15 | * plain and traversable objects, so a collection or a menu item with children |
| 16 | * offers the same access as any other object. |
| 17 | * |
| 18 | * Requires the using class to hold the object in `$value`, its wrapper in |
| 19 | * `$wrapper`, and whether its string conversion skips escaping in `$safe`. |
| 20 | * |
| 21 | * @internal |
| 22 | */ |
| 23 | trait ObjectAccess |
| 24 | { |
| 25 | /** @var array<class-string, array<string, ReflectionProperty>> public instance properties by class */ |
| 26 | private static array $declared = []; |
| 27 | |
| 28 | public function __toString(): string |
| 29 | { |
| 30 | if (!$this->value instanceof Stringable) { |
| 31 | throw new RuntimeException('Wrapped object is not stringable'); |
| 32 | } |
| 33 | |
| 34 | $string = (string) $this->value; |
| 35 | |
| 36 | return $this->safe ? $string : $this->wrapper->escape($string); |
| 37 | } |
| 38 | |
| 39 | public function __get(string $name): mixed |
| 40 | { |
| 41 | // Reflection spares the full lookup, which copies all properties and runs |
| 42 | // their get hooks. Dynamic properties and lazy proxies still need it. |
| 43 | $declared = self::$declared[$this->value::class] ?? $this->declaredProperties(); |
| 44 | $readable = isset($declared[$name]) && $declared[$name]->isInitialized($this->value); |
| 45 | |
| 46 | // An object with `__get()` answers for the properties it does not expose, |
| 47 | // as it does outside a template. |
| 48 | if ($readable || method_exists($this->value, '__get') || $this->hasPublicProperty($name)) { |
| 49 | return $this->wrapper->wrap($this->value->{$name}); |
| 50 | } |
| 51 | |
| 52 | throw new RuntimeException('No such property'); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Backs `isset()`, `empty()`, and `??` on properties. Delegates to the |
| 57 | * object, so its own `__isset()` applies and null counts as missing. |
| 58 | */ |
| 59 | public function __isset(string $name): bool |
| 60 | { |
| 61 | return isset($this->value->{$name}); |
| 62 | } |
| 63 | |
| 64 | public function __set(string $name, mixed $value): void |
| 65 | { |
| 66 | if ($this->hasPublicProperty($name)) { |
| 67 | $this->value->{$name} = $this->wrapper->unwrap($value); |
| 68 | |
| 69 | return; |
| 70 | } |
| 71 | |
| 72 | throw new RuntimeException('No such property'); |
| 73 | } |
| 74 | |
| 75 | /** @param array<array-key, mixed> $args */ |
| 76 | public function __call(string $name, array $args): mixed |
| 77 | { |
| 78 | if (is_callable([$this->value, $name])) { |
| 79 | return $this->wrapper->wrap($this->value->{$name}(...$this->unwrapArgs($args))); |
| 80 | } |
| 81 | |
| 82 | throw new RuntimeException('No such method'); |
| 83 | } |
| 84 | |
| 85 | public function __invoke(mixed ...$args): mixed |
| 86 | { |
| 87 | $object = $this->object(); |
| 88 | |
| 89 | if (is_callable($object)) { |
| 90 | return $this->wrapper->wrap($object(...$this->unwrapArgs($args))); |
| 91 | } |
| 92 | |
| 93 | throw new RuntimeException('No such method'); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * The wrapped object, typed loosely: Psalm does not consider that a |
| 98 | * traversable class may define `__invoke()`. |
| 99 | */ |
| 100 | private function object(): object |
| 101 | { |
| 102 | return $this->value; |
| 103 | } |
| 104 | |
| 105 | private function hasPublicProperty(string $name): bool |
| 106 | { |
| 107 | return array_key_exists($name, get_object_vars($this->value)); |
| 108 | } |
| 109 | |
| 110 | /** @return array<string, ReflectionProperty> */ |
| 111 | private function declaredProperties(): array |
| 112 | { |
| 113 | return self::$declared[$this->value::class] = array_column( |
| 114 | array_filter( |
| 115 | new ReflectionClass($this->value)->getProperties(ReflectionProperty::IS_PUBLIC), |
| 116 | static fn(ReflectionProperty $property): bool => !$property->isStatic(), |
| 117 | ), |
| 118 | null, |
| 119 | 'name', |
| 120 | ); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * @param array<array-key, mixed> $args |
| 125 | * @return array<array-key, mixed> |
| 126 | */ |
| 127 | private function unwrapArgs(array $args): array |
| 128 | { |
| 129 | // Spares the common call without arguments the pass through the wrapper. |
| 130 | return $args === [] ? $args : $this->wrapper->unwrap($args); |
| 131 | } |
| 132 | } |