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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Form\Element\Input; |
| 16 | |
| 17 | use Pop\Form\Element; |
| 18 | |
| 19 | /** |
| 20 | * Form file element class |
| 21 | * |
| 22 | * @category Pop |
| 23 | * @package Pop\Form |
| 24 | * @author Nick Sagona, III <nick@popphp.org> |
| 25 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 26 | * @license https://www.popphp.org/license New BSD License |
| 27 | * @version 5.0.0 |
| 28 | */ |
| 29 | |
| 30 | class File extends Element\Input |
| 31 | { |
| 32 | |
| 33 | /** |
| 34 | * Allowed file extensions (lowercase, no leading dot). Empty = any extension allowed. |
| 35 | * @var array |
| 36 | */ |
| 37 | protected array $allowedTypes = []; |
| 38 | |
| 39 | /** |
| 40 | * Maximum allowed file size, in bytes. Null = no limit enforced here. |
| 41 | * @var ?int |
| 42 | */ |
| 43 | protected ?int $maxSize = null; |
| 44 | |
| 45 | /** |
| 46 | * Constructor |
| 47 | * |
| 48 | * Instantiate the file input form element |
| 49 | * |
| 50 | * @param string $name |
| 51 | * @param ?string $value |
| 52 | * @param ?string $indent |
| 53 | */ |
| 54 | public function __construct(string $name, ?string $value = null, ?string $indent = null) |
| 55 | { |
| 56 | parent::__construct($name, 'file', $value, $indent); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Set the allowed file extensions (case-insensitive; leading dots are stripped) |
| 61 | * |
| 62 | * This checks the extension of the client-submitted filename only, not the file's |
| 63 | * actual content, so it is not a hard guarantee of file type (a client can rename any |
| 64 | * file). Pair it with real content validation at the storage layer if that matters. |
| 65 | * |
| 66 | * @param array $extensions |
| 67 | * @return File |
| 68 | */ |
| 69 | public function setAllowedTypes(array $extensions): File |
| 70 | { |
| 71 | $this->allowedTypes = array_map( |
| 72 | fn($extension) => strtolower(ltrim((string)$extension, '.')), $extensions |
| 73 | ); |
| 74 | return $this; |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Get the allowed file extensions |
| 79 | * |
| 80 | * @return array |
| 81 | */ |
| 82 | public function getAllowedTypes(): array |
| 83 | { |
| 84 | return $this->allowedTypes; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Determine if the element has allowed file extensions set |
| 89 | * |
| 90 | * @return bool |
| 91 | */ |
| 92 | public function hasAllowedTypes(): bool |
| 93 | { |
| 94 | return !empty($this->allowedTypes); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Set the maximum allowed file size, in bytes |
| 99 | * |
| 100 | * @param int $bytes |
| 101 | * @return File |
| 102 | */ |
| 103 | public function setMaxSize(int $bytes): File |
| 104 | { |
| 105 | $this->maxSize = $bytes; |
| 106 | return $this; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Get the maximum allowed file size, in bytes |
| 111 | * |
| 112 | * @return ?int |
| 113 | */ |
| 114 | public function getMaxSize(): ?int |
| 115 | { |
| 116 | return $this->maxSize; |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Determine if the element has a maximum file size set |
| 121 | * |
| 122 | * @return bool |
| 123 | */ |
| 124 | public function hasMaxSize(): bool |
| 125 | { |
| 126 | return ($this->maxSize !== null); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Validate the form element object |
| 131 | * |
| 132 | * @param array $formValues |
| 133 | * @return bool |
| 134 | */ |
| 135 | public function validate(array $formValues = []): bool |
| 136 | { |
| 137 | if (($_FILES) && (isset($_FILES[$this->name]['name']))) { |
| 138 | $value = $_FILES[$this->name]['name']; |
| 139 | $size = $_FILES[$this->name]['size']; |
| 140 | } else { |
| 141 | $value = null; |
| 142 | $size = null; |
| 143 | } |
| 144 | |
| 145 | // Check if the element is required |
| 146 | if (($this->required) && empty($value)) { |
| 147 | $this->errors[] = $this->getRequiredMessage(); |
| 148 | } |
| 149 | |
| 150 | // Check the file extension against the allowlist, if one is set |
| 151 | if (!empty($value) && $this->hasAllowedTypes()) { |
| 152 | $extension = strtolower((string)pathinfo((string)$value, PATHINFO_EXTENSION)); |
| 153 | if (!in_array($extension, $this->allowedTypes, true)) { |
| 154 | $this->errors[] = 'The file type must be one of the following: ' . |
| 155 | implode(', ', $this->allowedTypes) . '.'; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | // Check the file size against the max size, if one is set |
| 160 | if (($size !== null) && $this->hasMaxSize() && ((int)$size > $this->maxSize)) { |
| 161 | $this->errors[] = 'The file size must be less than or equal to ' . |
| 162 | \Pop\Utils\File::formatFileSize($this->maxSize) . '.'; |
| 163 | } |
| 164 | |
| 165 | // Check field validators |
| 166 | if (count($this->validators) > 0) { |
| 167 | foreach ($this->validators as $validator) { |
| 168 | if ($validator instanceof \Pop\Validator\ValidatorInterface) { |
| 169 | $class = get_class($validator); |
| 170 | if (($size !== null) && |
| 171 | (('Pop\Validator\LessThanEqual' == $class) || ('Pop\Validator\GreaterThanEqual' == $class) || |
| 172 | ('Pop\Validator\LessThan' == $class) || ('Pop\Validator\GreaterThan' == $class))) { |
| 173 | if (!$validator->evaluate($size)) { |
| 174 | $this->errors[] = $validator->getMessage(); |
| 175 | } |
| 176 | } else { |
| 177 | if (!$validator->evaluate($value)) { |
| 178 | $this->errors[] = $validator->getMessage(); |
| 179 | } |
| 180 | } |
| 181 | } else if (is_callable($validator)) { |
| 182 | $this->validateCallable($validator, $value, $formValues); |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | return (count($this->errors) == 0); |
| 188 | } |
| 189 | |
| 190 | } |