| 1 |
<?php |
| 2 |
/** |
| 3 |
* Poster generator class |
| 4 |
* |
| 5 |
* @package sharing-image |
| 6 |
* @author Anton Lukin |
| 7 |
*/ |
| 8 |
|
| 9 |
namespace Sharing_Image; |
| 10 |
|
| 11 |
use Exception; |
| 12 |
use WP_Error; |
| 13 |
use PosterEditor\PosterEditor; |
| 14 |
|
| 15 |
if ( ! defined( 'ABSPATH' ) ) { |
| 16 |
die; |
| 17 |
} |
| 18 |
|
| 19 |
/** |
| 20 |
* Poster generator class |
| 21 |
* |
| 22 |
* @class Generator |
| 23 |
*/ |
| 24 |
class Generator { |
| 25 |
/** |
| 26 |
* The instance of Settings class. |
| 27 |
* |
| 28 |
* @var instance |
| 29 |
*/ |
| 30 |
private $settings; |
| 31 |
|
| 32 |
/** |
| 33 |
* Generator constructor. |
| 34 |
*/ |
| 35 |
public function __construct() { |
| 36 |
$this->settings = new Settings(); |
| 37 |
} |
| 38 |
|
| 39 |
/** |
| 40 |
* Compose image using picker data. |
| 41 |
* |
| 42 |
* @param array $picker Picker data from metabox. |
| 43 |
* |
| 44 |
* @return array|WP_Error Poster url, width and height or WP_Error on failure. |
| 45 |
*/ |
| 46 |
public function compose( $picker ) { |
| 47 |
if ( ! isset( $picker['template'] ) ) { |
| 48 |
return new WP_Error( 'validate', esc_html__( 'Template id cannot be empty', 'sharing-image' ) ); |
| 49 |
} |
| 50 |
|
| 51 |
$id = absint( $picker['template'] ); |
| 52 |
|
| 53 |
// Get templates list from settings. |
| 54 |
$templates = $this->settings->get_templates(); |
| 55 |
|
| 56 |
if ( ! isset( $templates[ $id ] ) ) { |
| 57 |
return new WP_Error( 'validate', esc_html__( 'Wrong template id', 'sharing-image' ) ); |
| 58 |
} |
| 59 |
|
| 60 |
$fieldset = array(); |
| 61 |
|
| 62 |
if ( isset( $picker['fieldset'][ $id ] ) ) { |
| 63 |
$fieldset = $picker['fieldset'][ $id ]; |
| 64 |
} |
| 65 |
|
| 66 |
$template = $this->prepare_template( $templates[ $id ], $fieldset ); |
| 67 |
|
| 68 |
if ( ! $this->check_required( $template ) ) { |
| 69 |
return new WP_Error( 'generate', esc_html__( 'Wrong template settings', 'sharing-image' ) ); |
| 70 |
} |
| 71 |
|
| 72 |
list( $path, $url ) = $this->get_upload_file(); |
| 73 |
|
| 74 |
// Generate image and save it to given path. |
| 75 |
$poster = $this->create_poster( $template, $path ); |
| 76 |
|
| 77 |
if ( is_wp_error( $poster ) ) { |
| 78 |
return $poster; |
| 79 |
} |
| 80 |
|
| 81 |
$result = array( |
| 82 |
'poster' => $url, |
| 83 |
'width' => $template['width'], |
| 84 |
'height' => $template['height'], |
| 85 |
); |
| 86 |
|
| 87 |
return $result; |
| 88 |
} |
| 89 |
|
| 90 |
/** |
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* Show image for settings page using template data. |
| 92 |
* |
| 93 |
* @param array $template Templates data from settings page. |
| 94 |
* @param int $index Template index. |
| 95 |
* |
| 96 |
* @return void|WP_Error WP_Error on failure. |
| 97 |
*/ |
| 98 |
public function show( $template, $index ) { |
| 99 |
$template = $this->prepare_template( $template, null, $index ); |
| 100 |
|
| 101 |
if ( ! $this->check_required( $template ) ) { |
| 102 |
return new WP_Error( 'generate', esc_html__( 'Wrong template settings', 'sharing-image' ) ); |
| 103 |
} |
| 104 |
|
| 105 |
// Generate image and show it immediately. |
| 106 |
$poster = $this->create_poster( $template ); |
| 107 |
|
| 108 |
if ( is_wp_error( $poster ) ) { |
| 109 |
return $poster; |
| 110 |
} |
| 111 |
|
| 112 |
exit; // It's ok to exit here. Just cause we show an image above. |
| 113 |
} |
| 114 |
|
| 115 |
/** |
| 116 |
* Save image for settings page using template data. |
| 117 |
* |
| 118 |
* @param array $template Templates data from settings page. |
| 119 |
* @param int $index Template index. |
| 120 |
* |
| 121 |
* @return string|WP_Error Generated poster url or WP_Error on failure. |
| 122 |
*/ |
| 123 |
public function save( $template, $index ) { |
| 124 |
$template = $this->prepare_template( $template, null, $index ); |
| 125 |
|
| 126 |
if ( ! $this->check_required( $template ) ) { |
| 127 |
return new WP_Error( 'generate', esc_html__( 'Wrong template settings', 'sharing-image' ) ); |
| 128 |
} |
| 129 |
|
| 130 |
list( $path, $url ) = $this->get_upload_file(); |
| 131 |
|
| 132 |
// Generate image and save it. |
| 133 |
$poster = $this->create_poster( $template, $path ); |
| 134 |
|
| 135 |
if ( is_wp_error( $poster ) ) { |
| 136 |
return $poster; |
| 137 |
} |
| 138 |
|
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return $url; |
| 140 |
} |
| 141 |
|
| 142 |
/** |
| 143 |
* Prepare template before creating poster. |
| 144 |
* Used to fill fieldset texts and background image. |
| 145 |
* |
| 146 |
* @param array $template List of template data. |
| 147 |
* @param array $fieldset Optional. Fieldset data from picker. |
| 148 |
* @param integer $index Optional. Template index from editor. |
| 149 |
* |
| 150 |
* @return array List of template data. |
| 151 |
*/ |
| 152 |
private function prepare_template( $template, $fieldset = array(), $index = null ) { |
| 153 |
$layers = array(); |
| 154 |
|
| 155 |
if ( isset( $template['layers'] ) ) { |
| 156 |
$layers = $template['layers']; |
| 157 |
} |
| 158 |
|
| 159 |
foreach ( $layers as $i => &$layer ) { |
| 160 |
if ( empty( $layer['type'] ) || 'text' !== $layer['type'] ) { |
| 161 |
continue; |
| 162 |
} |
| 163 |
|
| 164 |
if ( empty( $layer['dynamic'] ) ) { |
| 165 |
continue; |
| 166 |
} |
| 167 |
|
| 168 |
$layer['content'] = null; |
| 169 |
|
| 170 |
if ( isset( $layer['sample'] ) ) { |
| 171 |
$layer['content'] = $layer['sample']; |
| 172 |
} |
| 173 |
|
| 174 |
if ( isset( $fieldset['captions'][ $i ] ) ) { |
| 175 |
$layer['content'] = $fieldset['captions'][ $i ]; |
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} |
| 177 |
} |
| 178 |
|
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$template['layers'] = $layers; |
| 180 |
|
| 181 |
if ( 'dynamic' === $template['background'] ) { |
| 182 |
if ( null !== $index ) { |
| 183 |
$template['image'] = sprintf( SHARING_IMAGE_DIR . 'assets/images/%d.jpg', ( $index % 12 ) + 1 ); |
| 184 |
} |
| 185 |
|
| 186 |
if ( ! empty( $fieldset['attachment'] ) ) { |
| 187 |
$template['image'] = get_attached_file( $fieldset['attachment'] ); |
| 188 |
} |
| 189 |
} |
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|
| 191 |
if ( 'permanent' === $template['background'] ) { |
| 192 |
if ( ! empty( $template['attachment'] ) ) { |
| 193 |
$template['image'] = get_attached_file( $template['attachment'] ); |
| 194 |
} |
| 195 |
} |
| 196 |
|
| 197 |
/** |
| 198 |
* Filters template before generation. |
| 199 |
* |
| 200 |
* @param array $template List of template data. |
| 201 |
* @param array $fieldset Fieldset data from picker. |
| 202 |
* @param integer $index Template index from editor. |
| 203 |
*/ |
| 204 |
return apply_filters( 'sharing_image_prepare_template', $template, $fieldset, $index ); |
| 205 |
} |
| 206 |
|
| 207 |
/** |
| 208 |
* Create poster using template data. |
| 209 |
* |
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* @param array $template List of template options. |
| 211 |
* @param string $path Optional. File path to save. |
| 212 |
* |
| 213 |
* @return void|WP_Error WP_Error on failure. |
| 214 |
*/ |
| 215 |
private function create_poster( $template, $path = null ) { |
| 216 |
try { |
| 217 |
$poster = new PosterEditor(); |
| 218 |
|
| 219 |
// Set color canvas options. |
| 220 |
$options = array( 'color' => $template['fill'] ); |
| 221 |
|
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// Create empty poster. |
| 223 |
$poster->canvas( $template['width'], $template['height'], $options ); |
| 224 |
|
| 225 |
// Recreate poster with image if exists. |
| 226 |
if ( ! empty( $template['image'] ) ) { |
| 227 |
$poster->make( $template['image'] )->fit( $template['width'], $template['height'] ); |
| 228 |
} |
| 229 |
|
| 230 |
if ( ! empty( $template['layers'] ) ) { |
| 231 |
$poster = $this->append_layers( $poster, $template['layers'] ); |
| 232 |
} |
| 233 |
|
| 234 |
$settings = $this->settings; |
| 235 |
|
| 236 |
if ( null === $path ) { |
| 237 |
return $poster->show( $settings->get_file_format(), $settings->get_quality() ); |
| 238 |
} |
| 239 |
|
| 240 |
$poster->save( $path, $settings->get_quality() ); |
| 241 |
|
| 242 |
} catch ( Exception $e ) { |
| 243 |
return new WP_Error( 'generate', $e->getMessage() ); |
| 244 |
} |
| 245 |
} |
| 246 |
|
| 247 |
/** |
| 248 |
* Append layers to image. |
| 249 |
* |
| 250 |
* @param PosterEditor $poster Instance of PosterEditor class. |
| 251 |
* @param array $layers List of layers options. |
| 252 |
* |
| 253 |
* @return PosterEditor PosterEditor instance. |
| 254 |
*/ |
| 255 |
private function append_layers( $poster, $layers ) { |
| 256 |
$layers = array_reverse( $layers ); |
| 257 |
|
| 258 |
foreach ( $layers as $layer ) { |
| 259 |
if ( empty( $layer['type'] ) ) { |
| 260 |
continue; |
| 261 |
} |
| 262 |
|
| 263 |
switch ( $layer['type'] ) { |
| 264 |
case 'filter': |
| 265 |
$poster = $this->draw_filter( $poster, $layer ); |
| 266 |
break; |
| 267 |
|
| 268 |
case 'rectangle': |
| 269 |
$poster = $this->draw_rectangle( $poster, $layer ); |
| 270 |
break; |
| 271 |
|
| 272 |
case 'text': |
| 273 |
$poster = $this->draw_text( $poster, $layer ); |
| 274 |
break; |
| 275 |
|
| 276 |
case 'image': |
| 277 |
$poster = $this->draw_image( $poster, $layer ); |
| 278 |
break; |
| 279 |
} |
| 280 |
} |
| 281 |
|
| 282 |
return $poster; |
| 283 |
} |
| 284 |
|
| 285 |
/** |
| 286 |
* Draw filter layer |
| 287 |
* |
| 288 |
* @param PosterEditor $poster Instance of PosterEditor class. |
| 289 |
* @param array $layer Filter layer options. |
| 290 |
* |
| 291 |
* @return PosterEditor PosterEditor instance. |
| 292 |
*/ |
| 293 |
private function draw_filter( $poster, $layer ) { |
| 294 |
if ( ! empty( $layer['grayscale'] ) ) { |
| 295 |
$poster->grayscale(); |
| 296 |
} |
| 297 |
|
| 298 |
if ( ! empty( $layer['blur'] ) ) { |
| 299 |
$poster->blur(); |
| 300 |
} |
| 301 |
|
| 302 |
if ( isset( $layer['contrast'] ) ) { |
| 303 |
$poster->contrast( $layer['contrast'] ); |
| 304 |
} |
| 305 |
|
| 306 |
if ( isset( $layer['brightness'] ) ) { |
| 307 |
$poster->brightness( $layer['brightness'] ); |
| 308 |
} |
| 309 |
|
| 310 |
if ( isset( $layer['blackout'] ) ) { |
| 311 |
$poster->blackout( $layer['blackout'] ); |
| 312 |
} |
| 313 |
|
| 314 |
return $poster; |
| 315 |
} |
| 316 |
|
| 317 |
/** |
| 318 |
* Draw rectangle layer. |
| 319 |
* |
| 320 |
* @param PosterEditor $poster Instance of PosterEditor class. |
| 321 |
* @param array $layer Rectangle layer options. |
| 322 |
* |
| 323 |
* @return PosterEditor PosterEditor instance. |
| 324 |
*/ |
| 325 |
private function draw_rectangle( $poster, $layer ) { |
| 326 |
// Both x and y should be set. |
| 327 |
if ( ! isset( $layer['x'], $layer['y'] ) ) { |
| 328 |
return $poster; |
| 329 |
} |
| 330 |
|
| 331 |
$args = $this->prepare_args( $layer, array( 'color', 'opacity', 'thickness' ) ); |
| 332 |
|
| 333 |
if ( ! empty( $layer['outline'] ) ) { |
| 334 |
$args['outline'] = true; |
| 335 |
} |
| 336 |
|
| 337 |
if ( ! isset( $layer['width'] ) ) { |
| 338 |
$layer['width'] = 0; |
| 339 |
} |
| 340 |
|
| 341 |
if ( ! isset( $layer['height'] ) ) { |
| 342 |
$layer['height'] = 0; |
| 343 |
} |
| 344 |
|
| 345 |
// Draw rectangle. |
| 346 |
$poster->rectangle( $layer['x'], $layer['y'], $layer['width'], $layer['height'], $args ); |
| 347 |
|
| 348 |
return $poster; |
| 349 |
} |
| 350 |
|
| 351 |
/** |
| 352 |
* Draw image layer |
| 353 |
* |
| 354 |
* @param PosterEditor $poster Instance of PosterEditor class. |
| 355 |
* @param object $layer Option name. |
| 356 |
* |
| 357 |
* @return PosterEditor PosterEditor instance. |
| 358 |
*/ |
| 359 |
private function draw_image( $poster, $layer ) { |
| 360 |
// Attachment id is required. |
| 361 |
if ( ! isset( $layer['attachment'] ) ) { |
| 362 |
return $poster; |
| 363 |
} |
| 364 |
|
| 365 |
$args = $this->prepare_args( $layer, array( 'x', 'y', 'width', 'height' ) ); |
| 366 |
|
| 367 |
// Get attachment file by id. |
| 368 |
$image = get_attached_file( $layer['attachment'] ); |
| 369 |
|
| 370 |
// Insert image to poster. |
| 371 |
$poster->insert( $image, $args ); |
| 372 |
|
| 373 |
return $poster; |
| 374 |
} |
| 375 |
|
| 376 |
/** |
| 377 |
* Draw text layer. |
| 378 |
* |
| 379 |
* @param PosterEditor $poster Instance of PosterEditor class. |
| 380 |
* @param array $layer Rectangle layer options. |
| 381 |
* |
| 382 |
* @return PosterEditor PosterEditor instance. |
| 383 |
*/ |
| 384 |
private function draw_text( $poster, $layer ) { |
| 385 |
$args = $this->prepare_args( $layer, array( 'x', 'y', 'width', 'height', 'fontsize', 'color', 'lineheight', 'opacity', 'horizontal', 'vertical' ) ); |
| 386 |
|
| 387 |
// Try to set font file by name or attachment path. |
| 388 |
$args['fontpath'] = $this->get_fontpath( $layer ); |
| 389 |
|
| 390 |
if ( ! empty( $layer['content'] ) ) { |
| 391 |
$poster->text( $layer['content'], $args ); |
| 392 |
} |
| 393 |
|
| 394 |
return $poster; |
| 395 |
} |
| 396 |
|
| 397 |
/** |
| 398 |
* Get font file path by layer data. |
| 399 |
* |
| 400 |
* @param array $layer Layer data. |
| 401 |
* @param string $path Default file path. |
| 402 |
* |
| 403 |
* @return string Filtered path to font file. |
| 404 |
*/ |
| 405 |
private function get_fontpath( $layer, $path = '' ) { |
| 406 |
if ( isset( $layer['fontname'] ) ) { |
| 407 |
$path = sprintf( SHARING_IMAGE_DIR . 'assets/fonts/%s.ttf', $layer['fontname'] ); |
| 408 |
} |
| 409 |
|
| 410 |
if ( isset( $layer['fontfile'] ) ) { |
| 411 |
$path = get_attached_file( $layer['fontfile'] ); |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* Filters generator font file path. |
| 416 |
* |
| 417 |
* @param string $path Font file path. |
| 418 |
* @param array $layer Layer data. |
| 419 |
*/ |
| 420 |
return apply_filters( 'sharing_image_get_fontpath', $path, $layer ); |
| 421 |
} |
| 422 |
|
| 423 |
/** |
| 424 |
* Generate upload file path and url. |
| 425 |
* |
| 426 |
* @return array Server file path and url to uploaded image. |
| 427 |
*/ |
| 428 |
private function get_upload_file() { |
| 429 |
// Get uploads directory url and path array. |
| 430 |
list( $path, $url ) = $this->settings->get_upload_dir(); |
| 431 |
|
| 432 |
// Create random file name with proper extension. |
| 433 |
$name = wp_unique_filename( $path, uniqid() . '.' . $this->settings->get_file_format() ); |
| 434 |
|
| 435 |
$file = array( |
| 436 |
trailingslashit( $path ) . $name, |
| 437 |
trailingslashit( $url ) . $name, |
| 438 |
); |
| 439 |
|
| 440 |
/** |
| 441 |
* Filters upload file path and url |
| 442 |
* |
| 443 |
* @param array $file Server file path and url to image. |
| 444 |
* @param string $name Unique file name. |
| 445 |
*/ |
| 446 |
return apply_filters( 'sharing_image_get_upload_file', $file, $name ); |
| 447 |
} |
| 448 |
|
| 449 |
/** |
| 450 |
* Prepare args and remove not-allowed keys. |
| 451 |
* |
| 452 |
* @param array $args List of source arguments. |
| 453 |
* @param array $allowed List of allowed keys. |
| 454 |
* |
| 455 |
* @return array List of prepared args. |
| 456 |
*/ |
| 457 |
private function prepare_args( $args, $allowed ) { |
| 458 |
return wp_array_slice_assoc( $args, $allowed ); |
| 459 |
} |
| 460 |
|
| 461 |
/** |
| 462 |
* Check requred template values. |
| 463 |
* |
| 464 |
* @param array $template List of template settings. |
| 465 |
* |
| 466 |
* @return bool Whether all required values isset. |
| 467 |
*/ |
| 468 |
private function check_required( $template ) { |
| 469 |
$required = array( 'width', 'height', 'fill' ); |
| 470 |
|
| 471 |
// Count intersected values. |
| 472 |
$prepared = count( $this->prepare_args( $template, $required ) ); |
| 473 |
|
| 474 |
if ( count( $required ) === $prepared ) { |
| 475 |
return true; |
| 476 |
} |
| 477 |
|
| 478 |
return false; |
| 479 |
} |
| 480 |
} |
| 481 |
|
