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| 1 | <?php |
| 2 | declare( strict_types = 1 ); |
| 3 | |
| 4 | /** |
| 5 | * Button.php |
| 6 | * |
| 7 | * This file is part of the Codex design system, the official design system for Wikimedia projects. |
| 8 | * It contains the definition and implementation of the `Button` class, responsible for managing |
| 9 | * the behavior and properties of the corresponding component. |
| 10 | * |
| 11 | * @category Component |
| 12 | * @package Codex\Component |
| 13 | * @since 0.1.0 |
| 14 | * @author Doğu Abaris <abaris@null.net> |
| 15 | * @license https://www.gnu.org/copyleft/gpl.html GPL-2.0-or-later |
| 16 | * @link https://doc.wikimedia.org/codex/main/ Codex Documentation |
| 17 | */ |
| 18 | |
| 19 | namespace Wikimedia\Codex\Component; |
| 20 | |
| 21 | use InvalidArgumentException; |
| 22 | use Wikimedia\Codex\Contract\Component; |
| 23 | use Wikimedia\Codex\Renderer\ButtonRenderer; |
| 24 | |
| 25 | /** |
| 26 | * Button |
| 27 | * |
| 28 | * @category Component |
| 29 | * @package Codex\Component |
| 30 | * @since 0.1.0 |
| 31 | * @author Doğu Abaris <abaris@null.net> |
| 32 | * @license https://www.gnu.org/copyleft/gpl.html GPL-2.0-or-later |
| 33 | * @link https://doc.wikimedia.org/codex/main/ Codex Documentation |
| 34 | */ |
| 35 | class Button extends Component { |
| 36 | /** |
| 37 | * Allowed action styles for the button. |
| 38 | */ |
| 39 | public const ALLOWED_ACTIONS = [ |
| 40 | 'default', |
| 41 | 'progressive', |
| 42 | 'destructive', |
| 43 | ]; |
| 44 | |
| 45 | /** |
| 46 | * Allowed sizes for the button. |
| 47 | */ |
| 48 | public const ALLOWED_SIZES = [ |
| 49 | 'medium', |
| 50 | 'large', |
| 51 | ]; |
| 52 | |
| 53 | /** |
| 54 | * Allowed button types. |
| 55 | */ |
| 56 | public const ALLOWED_TYPES = [ |
| 57 | 'button', |
| 58 | 'submit', |
| 59 | 'reset', |
| 60 | ]; |
| 61 | |
| 62 | /** |
| 63 | * Allowed weight styles for the button. |
| 64 | */ |
| 65 | public const ALLOWED_WEIGHTS = [ |
| 66 | 'normal', |
| 67 | 'primary', |
| 68 | 'quiet', |
| 69 | ]; |
| 70 | |
| 71 | private string $id = ''; |
| 72 | |
| 73 | public function __construct( |
| 74 | ButtonRenderer $renderer, |
| 75 | private string|HtmlSnippet $label, |
| 76 | private string $action, |
| 77 | private string $size, |
| 78 | private string $type, |
| 79 | private string $weight, |
| 80 | private ?string $iconClass, |
| 81 | private bool $iconOnly, |
| 82 | private bool $disabled, |
| 83 | private array $attributes, |
| 84 | private ?string $href = null, |
| 85 | ) { |
| 86 | parent::__construct( $renderer ); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Get the button's HTML ID attribute. |
| 91 | * |
| 92 | * This method returns the ID assigned to the button element. |
| 93 | * The ID is useful for targeting the button with JavaScript, CSS, or accessibility features. |
| 94 | * |
| 95 | * @since 0.1.0 |
| 96 | * @return string The ID of the button element. |
| 97 | */ |
| 98 | public function getId(): string { |
| 99 | return $this->id; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Get the label displayed on the button. |
| 104 | * |
| 105 | * This method returns the text label displayed on the button. The label provides context |
| 106 | * to users about the button's action, ensuring that it is understandable and accessible. |
| 107 | * |
| 108 | * @since 0.1.0 |
| 109 | * @return string|HtmlSnippet The label of the button. |
| 110 | */ |
| 111 | public function getLabel(): string|HtmlSnippet { |
| 112 | return $this->label; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Get the action style of the button. |
| 117 | * |
| 118 | * This method returns the action style of the button, indicating the visual style |
| 119 | * that reflects the nature of the action it represents (e.g., 'default', 'progressive', 'destructive'). |
| 120 | * |
| 121 | * @since 0.1.0 |
| 122 | * @return string The action style of the button. |
| 123 | */ |
| 124 | public function getAction(): string { |
| 125 | return $this->action; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Get the weight style of the button. |
| 130 | * |
| 131 | * This method returns the weight style of the button, which indicates its visual prominence |
| 132 | * (e.g., 'normal', 'primary', 'quiet'). |
| 133 | * |
| 134 | * @since 0.1.0 |
| 135 | * @return string The weight style of the button. |
| 136 | */ |
| 137 | public function getWeight(): string { |
| 138 | return $this->weight; |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Get the size of the button. |
| 143 | * |
| 144 | * This method returns the size of the button, determining whether it is 'medium' or 'large'. |
| 145 | * |
| 146 | * @since 0.1.0 |
| 147 | * @return string The size of the button. |
| 148 | */ |
| 149 | public function getSize(): string { |
| 150 | return $this->size; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Get the type of the button. |
| 155 | * |
| 156 | * This method returns the type of the button, determining whether it is 'button', 'submit', or 'reset'. |
| 157 | * |
| 158 | * @since 0.1.0 |
| 159 | * @return string The type of the button. |
| 160 | */ |
| 161 | public function getType(): string { |
| 162 | return $this->type ?: 'button'; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Get the icon class for the button. |
| 167 | * |
| 168 | * This method returns the CSS class used for the icon displayed inside the button. |
| 169 | * The icon is an additional visual element that can be included in the button to enhance usability. |
| 170 | * |
| 171 | * @since 0.1.0 |
| 172 | * @return string|null The CSS class for the icon, or null if no icon is set. |
| 173 | */ |
| 174 | public function getIconClass(): ?string { |
| 175 | return $this->iconClass; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Check if the button is icon-only. |
| 180 | * |
| 181 | * This method returns a boolean value indicating whether the button is icon-only (i.e., displays only an icon |
| 182 | * without any text). This is useful in scenarios where space is limited. |
| 183 | * |
| 184 | * @since 0.1.0 |
| 185 | * @return bool True if the button is icon-only, false otherwise. |
| 186 | */ |
| 187 | public function isIconOnly(): bool { |
| 188 | return $this->iconOnly; |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Check if the button is disabled. |
| 193 | * |
| 194 | * This method returns a boolean value indicating whether the button is disabled. |
| 195 | * |
| 196 | * @since 0.1.0 |
| 197 | * @return bool True if the button is disabled, false otherwise. |
| 198 | */ |
| 199 | public function isDisabled(): bool { |
| 200 | return $this->disabled; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Retrieve additional HTML attributes for the button element. |
| 205 | * |
| 206 | * This method returns an associative array of additional HTML attributes that will be applied |
| 207 | * to the <button> element. These attributes can be used to enhance customization, improve accessibility, |
| 208 | * and facilitate JavaScript integration. |
| 209 | * |
| 210 | * @since 0.1.0 |
| 211 | * @return array The additional attributes as an array. |
| 212 | */ |
| 213 | public function getAttributes(): array { |
| 214 | return $this->attributes; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Set the button's HTML ID attribute. |
| 219 | * |
| 220 | * @deprecated Use setAttributes() to set the ID |
| 221 | * @since 0.1.0 |
| 222 | * @param string $id The ID for the button element. |
| 223 | * @return $this |
| 224 | */ |
| 225 | public function setId( string $id ): self { |
| 226 | $this->id = $id; |
| 227 | |
| 228 | return $this; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Set the label for the button. |
| 233 | * |
| 234 | * This method defines the text that will be displayed on the button. The label is crucial for providing |
| 235 | * users with context about the button's action. In cases where the button is not icon-only, the label |
| 236 | * will be wrapped in a `<span>` element within the button. |
| 237 | * |
| 238 | * It's important to use concise and descriptive text for the label to ensure usability. |
| 239 | * |
| 240 | * @since 0.1.0 |
| 241 | * @param string|HtmlSnippet $label The text label displayed on the button. |
| 242 | * @return $this Returns the Button instance for method chaining. |
| 243 | */ |
| 244 | public function setLabel( string|HtmlSnippet $label ): self { |
| 245 | $this->label = $label; |
| 246 | |
| 247 | return $this; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Set the action style for the button. |
| 252 | * |
| 253 | * This method determines the visual style of the button, which reflects the nature of the action |
| 254 | * it represents. The action can be one of the following: |
| 255 | * - 'default': A standard action button with no special emphasis. |
| 256 | * - 'progressive': Indicates a positive or confirmatory action, often styled with a green or blue background. |
| 257 | * - 'destructive': Used for actions that have a significant or irreversible impact, typically styled in red. |
| 258 | * |
| 259 | * The action style is applied as a CSS class (`cdx-button--action-{action}`) to the button element. |
| 260 | * |
| 261 | * @since 0.1.0 |
| 262 | * @param string $action The action style for the button. |
| 263 | * @return $this Returns the Button instance for method chaining. |
| 264 | */ |
| 265 | public function setAction( string $action ): self { |
| 266 | if ( !in_array( $action, self::ALLOWED_ACTIONS, true ) ) { |
| 267 | throw new InvalidArgumentException( "Invalid action: $action" ); |
| 268 | } |
| 269 | $this->action = $action; |
| 270 | |
| 271 | return $this; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * Set the weight style for the button. |
| 276 | * |
| 277 | * This method sets the visual prominence of the button, which can be: |
| 278 | * - 'normal': A standard button with default emphasis. |
| 279 | * - 'primary': A high-importance button that stands out, often used for primary actions. |
| 280 | * - 'quiet': A subtle, low-emphasis button, typically used for secondary or tertiary actions. |
| 281 | * |
| 282 | * The weight style is applied as a CSS class (`cdx-button--weight-{weight}`) to the button element. |
| 283 | * |
| 284 | * @since 0.1.0 |
| 285 | * @param string $weight The weight style for the button. |
| 286 | * @return $this Returns the Button instance for method chaining. |
| 287 | */ |
| 288 | public function setWeight( string $weight ): self { |
| 289 | if ( !in_array( $weight, self::ALLOWED_WEIGHTS, true ) ) { |
| 290 | throw new InvalidArgumentException( "Invalid weight: $weight" ); |
| 291 | } |
| 292 | $this->weight = $weight; |
| 293 | |
| 294 | return $this; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Set the size of the button. |
| 299 | * |
| 300 | * This method defines the size of the button, which can be either: |
| 301 | * - 'medium': The default size, suitable for most use cases. |
| 302 | * - 'large': A larger button, often used to improve accessibility or to emphasize an action. |
| 303 | * |
| 304 | * The size is applied as a CSS class (`cdx-button--size-{size}`) to the button element. |
| 305 | * |
| 306 | * @since 0.1.0 |
| 307 | * @param string $size The size of the button. |
| 308 | * @return $this Returns the Button instance for method chaining. |
| 309 | */ |
| 310 | public function setSize( string $size ): self { |
| 311 | if ( !in_array( $size, self::ALLOWED_SIZES, true ) ) { |
| 312 | throw new InvalidArgumentException( "Invalid size: $size" ); |
| 313 | } |
| 314 | $this->size = $size; |
| 315 | |
| 316 | return $this; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Set the type of the button. |
| 321 | * |
| 322 | * This method sets the button's type attribute, which can be one of the following: |
| 323 | * - 'button': A standard clickable button. |
| 324 | * - 'submit': A button used to submit a form. |
| 325 | * - 'reset': A button used to reset form fields to their initial values. |
| 326 | * |
| 327 | * The type attribute is applied directly to the `<button>` element. |
| 328 | * |
| 329 | * @since 0.1.0 |
| 330 | * @param string $type The type for the button. |
| 331 | * @return $this Returns the Button instance for method chaining. |
| 332 | */ |
| 333 | public function setType( string $type ): self { |
| 334 | if ( !in_array( $type, self::ALLOWED_TYPES, true ) ) { |
| 335 | throw new InvalidArgumentException( "Invalid button type: $type" ); |
| 336 | } |
| 337 | $this->type = $type; |
| 338 | |
| 339 | return $this; |
| 340 | } |
| 341 | |
| 342 | /** |
| 343 | * Set the icon class for the button. |
| 344 | * |
| 345 | * This method specifies a CSS class for an icon to be displayed inside the button. The icon is rendered |
| 346 | * within a `<span>` element with the class `cdx-button__icon`, and should be defined using a suitable |
| 347 | * icon font or SVG sprite. |
| 348 | * |
| 349 | * The icon enhances the button's usability by providing a visual cue regarding the button's action. |
| 350 | * |
| 351 | * @since 0.1.0 |
| 352 | * @param string $iconClass The CSS class for the icon. |
| 353 | * @return $this Returns the Button instance for method chaining. |
| 354 | */ |
| 355 | public function setIconClass( string $iconClass ): self { |
| 356 | $this->iconClass = $iconClass; |
| 357 | |
| 358 | return $this; |
| 359 | } |
| 360 | |
| 361 | /** |
| 362 | * Set whether the button should be icon-only. |
| 363 | * |
| 364 | * This method determines whether the button should display only an icon, without any text. |
| 365 | * When set to `true`, the button will only render the icon, making it useful for scenarios where |
| 366 | * space is limited, such as in toolbars or mobile interfaces. |
| 367 | * |
| 368 | * Icon-only buttons should always include an `aria-label` attribute for accessibility, ensuring that |
| 369 | * the button's purpose is clear to screen reader users. |
| 370 | * |
| 371 | * @since 0.1.0 |
| 372 | * @param bool $iconOnly Whether the button is icon-only. |
| 373 | * @return $this Returns the Button instance for method chaining. |
| 374 | */ |
| 375 | public function setIconOnly( bool $iconOnly ): self { |
| 376 | $this->iconOnly = $iconOnly; |
| 377 | |
| 378 | return $this; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Set whether the button is disabled. |
| 383 | * |
| 384 | * This method disables the button, preventing any interaction. |
| 385 | * A disabled button appears inactive and cannot be clicked. |
| 386 | * |
| 387 | * Example usage: |
| 388 | * |
| 389 | * $button->setDisabled(true); |
| 390 | * |
| 391 | * @since 0.1.0 |
| 392 | * @param bool $disabled Indicates whether the button is disabled. |
| 393 | * @return $this Returns the Button instance for method chaining. |
| 394 | */ |
| 395 | public function setDisabled( bool $disabled ): self { |
| 396 | $this->disabled = $disabled; |
| 397 | |
| 398 | return $this; |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * Set additional HTML attributes for the button element. |
| 403 | * |
| 404 | * This method allows custom HTML attributes to be added to the button element, such as `id`, `data-*`, `aria-*`, |
| 405 | * or any other valid attributes. These attributes can be used to integrate the button with JavaScript, enhance |
| 406 | * accessibility, or provide additional metadata. |
| 407 | * |
| 408 | * The values of these attributes are automatically escaped to prevent XSS vulnerabilities. |
| 409 | * |
| 410 | * Example usage: |
| 411 | * |
| 412 | * $button->setAttributes([ |
| 413 | * 'id' => 'submit-button', |
| 414 | * 'data-toggle' => 'modal', |
| 415 | * 'aria-label' => 'Submit Form' |
| 416 | * ]); |
| 417 | * |
| 418 | * @since 0.1.0 |
| 419 | * @param array $attributes An associative array of HTML attributes. |
| 420 | * @return $this Returns the Button instance for method chaining. |
| 421 | */ |
| 422 | public function setAttributes( array $attributes ): self { |
| 423 | foreach ( $attributes as $key => $value ) { |
| 424 | $this->attributes[$key] = $value; |
| 425 | } |
| 426 | return $this; |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * Set the href for the button. |
| 431 | * |
| 432 | * If set, the button will render as an <a> element styled like a button. |
| 433 | * |
| 434 | * @param string|null $href The href for the button link. |
| 435 | * @return $this Returns the Button instance for method chaining. |
| 436 | */ |
| 437 | public function setHref( ?string $href ): self { |
| 438 | $this->href = $href; |
| 439 | |
| 440 | return $this; |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * Get the href for the button. |
| 445 | * |
| 446 | * If an href is provided, the button will be rendered as an <a> element |
| 447 | * styled to look like a button instead of a native <button>. |
| 448 | * |
| 449 | * @return string|null |
| 450 | */ |
| 451 | public function getHref(): ?string { |
| 452 | return $this->href; |
| 453 | } |
| 454 | |
| 455 | } |