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| 1 | <?php |
| 2 | /** |
| 3 | * Defines Jetpack CRM Automation engine. |
| 4 | * |
| 5 | * @package automattic/jetpack-crm |
| 6 | * @since 6.2.0 |
| 7 | */ |
| 8 | |
| 9 | namespace Automattic\Jetpack\CRM\Automation; |
| 10 | |
| 11 | use Automattic\Jetpack\CRM\Automation\Data_Transformers\Data_Transformer_Base; |
| 12 | use Automattic\Jetpack\CRM\Automation\Data_Types\Data_Type; |
| 13 | use Automattic\Jetpack\CRM\Automation\Data_Types\Data_Type_Base; |
| 14 | |
| 15 | /** |
| 16 | * Automation Engine. |
| 17 | * |
| 18 | * @since 6.2.0 |
| 19 | */ |
| 20 | class Automation_Engine { |
| 21 | |
| 22 | /** |
| 23 | * Instance singleton. |
| 24 | * |
| 25 | * @since 6.2.0 |
| 26 | * @var Automation_Engine |
| 27 | */ |
| 28 | private static $instance = null; |
| 29 | |
| 30 | /** |
| 31 | * The triggers map name => classname. |
| 32 | * |
| 33 | * @since 6.2.0 |
| 34 | * @var string[] |
| 35 | */ |
| 36 | private $triggers_map = array(); |
| 37 | |
| 38 | /** |
| 39 | * The steps map name => classname. |
| 40 | * |
| 41 | * @since 6.2.0 |
| 42 | * @var string[] |
| 43 | */ |
| 44 | private $steps_map = array(); |
| 45 | |
| 46 | /** |
| 47 | * The Automation logger. |
| 48 | * |
| 49 | * @since 6.2.0 |
| 50 | * @var ?Automation_Logger |
| 51 | */ |
| 52 | private $automation_logger = null; |
| 53 | |
| 54 | /** |
| 55 | * The list of registered workflows. |
| 56 | * |
| 57 | * @since 6.2.0 |
| 58 | * @var Automation_Workflow[] |
| 59 | */ |
| 60 | private $workflows = array(); |
| 61 | |
| 62 | /** |
| 63 | * An array of supported data types. |
| 64 | * |
| 65 | * @since 6.2.0 |
| 66 | * |
| 67 | * @var Data_Type_Base[] |
| 68 | */ |
| 69 | private $data_types = array(); |
| 70 | |
| 71 | /** |
| 72 | * An array of supported data transformers. |
| 73 | * |
| 74 | * @since 6.2.0 |
| 75 | * |
| 76 | * @var Data_Transformer_Base[] |
| 77 | */ |
| 78 | private $data_transformers = array(); |
| 79 | |
| 80 | /** |
| 81 | * An array of data type that represents support between types. |
| 82 | * |
| 83 | * @since 6.2.0 |
| 84 | * |
| 85 | * @var string[] |
| 86 | */ |
| 87 | public $data_transform_map = array(); |
| 88 | |
| 89 | /** |
| 90 | * Instance singleton object. |
| 91 | * |
| 92 | * @since 6.2.0 |
| 93 | * |
| 94 | * @param bool $force Whether to force a new Automation_Engine instance. |
| 95 | * @return Automation_Engine The Automation_Engine instance. |
| 96 | */ |
| 97 | public static function instance( bool $force = false ): Automation_Engine { |
| 98 | if ( ! self::$instance || $force ) { |
| 99 | self::$instance = new self(); |
| 100 | } |
| 101 | |
| 102 | return self::$instance; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Set the automation logger. |
| 107 | * |
| 108 | * @since 6.2.0 |
| 109 | * |
| 110 | * @param Automation_Logger $logger The automation logger. |
| 111 | */ |
| 112 | public function set_automation_logger( Automation_Logger $logger ) { |
| 113 | $this->automation_logger = $logger; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Register data transformer. |
| 118 | * |
| 119 | * @since 6.2.0 |
| 120 | * |
| 121 | * @param string $class_name The fully qualified class name for the data transformer. |
| 122 | * @return void |
| 123 | * |
| 124 | * @throws Data_Transformer_Exception Throws an exception if the data transformer class do not look valid. |
| 125 | */ |
| 126 | public function register_data_transformer( string $class_name ): void { |
| 127 | if ( ! class_exists( $class_name ) ) { |
| 128 | throw new Data_Transformer_Exception( |
| 129 | sprintf( 'Data Transformer class do not exist: %s', $class_name ), |
| 130 | Data_Transformer_Exception::CLASS_NOT_FOUND |
| 131 | ); |
| 132 | } |
| 133 | |
| 134 | // Make sure that the class implements the Data_Transformer base class, |
| 135 | // so we're certain that required logic exists to use the object. |
| 136 | if ( ! is_subclass_of( $class_name, Data_Transformer_Base::class ) ) { |
| 137 | throw new Data_Transformer_Exception( |
| 138 | sprintf( 'Data Transformer class do not extend base class: %s', $class_name ), |
| 139 | Data_Transformer_Exception::DO_NOT_EXTEND_BASE |
| 140 | ); |
| 141 | } |
| 142 | |
| 143 | if ( isset( $this->data_transformers[ $class_name ] ) ) { |
| 144 | throw new Data_Transformer_Exception( |
| 145 | sprintf( 'Data Transformer slug already exist: %s', $class_name ), |
| 146 | Data_Transformer_Exception::SLUG_EXISTS |
| 147 | ); |
| 148 | } |
| 149 | |
| 150 | $this->data_transformers[ $class_name ] = $class_name; |
| 151 | |
| 152 | if ( ! isset( $this->data_transform_map[ $class_name::get_from() ] ) ) { |
| 153 | $this->data_transform_map[ $class_name::get_from() ] = array(); |
| 154 | } |
| 155 | |
| 156 | $this->data_transform_map[ $class_name::get_from() ][ $class_name::get_to() ] = $class_name; |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Register a trigger. |
| 161 | * |
| 162 | * @since 6.2.0 |
| 163 | * |
| 164 | * @param string $trigger_classname Trigger classname to add to the mapping. |
| 165 | * |
| 166 | * @throws Automation_Exception Throws an exception if the trigger class does not match the expected conditions. |
| 167 | */ |
| 168 | public function register_trigger( string $trigger_classname ) { |
| 169 | |
| 170 | if ( ! class_exists( $trigger_classname ) ) { |
| 171 | throw new Automation_Exception( |
| 172 | /* Translators: %s is the name of the trigger class that does not exist. */ |
| 173 | sprintf( __( 'Trigger class %s does not exist', 'zero-bs-crm' ), $trigger_classname ), |
| 174 | Automation_Exception::TRIGGER_CLASS_NOT_FOUND |
| 175 | ); |
| 176 | } |
| 177 | |
| 178 | // Check if the trigger implements the interface |
| 179 | if ( ! in_array( Trigger::class, class_implements( $trigger_classname ), true ) ) { |
| 180 | throw new Automation_Exception( |
| 181 | /* Translators: %s is the name of the trigger class that does not implement the Trigger interface. */ |
| 182 | sprintf( __( 'Trigger class %s does not implement the Trigger interface', 'zero-bs-crm' ), $trigger_classname ), |
| 183 | Automation_Exception::TRIGGER_CLASS_NOT_FOUND |
| 184 | ); |
| 185 | } |
| 186 | |
| 187 | // Check if the trigger has proper slug |
| 188 | $trigger_slug = $trigger_classname::get_slug(); |
| 189 | |
| 190 | if ( empty( $trigger_slug ) ) { |
| 191 | throw new Automation_Exception( |
| 192 | __( 'The trigger must have a non-empty slug', 'zero-bs-crm' ), |
| 193 | Automation_Exception::TRIGGER_SLUG_EMPTY |
| 194 | ); |
| 195 | } |
| 196 | |
| 197 | if ( array_key_exists( $trigger_slug, $this->triggers_map ) ) { |
| 198 | throw new Automation_Exception( |
| 199 | /* Translators: %s is the name of the trigger slug that already exists. */ |
| 200 | sprintf( __( 'Trigger slug already exists: %s', 'zero-bs-crm' ), $trigger_slug ), |
| 201 | Automation_Exception::TRIGGER_SLUG_EXISTS |
| 202 | ); |
| 203 | } |
| 204 | |
| 205 | $this->triggers_map[ $trigger_slug ] = $trigger_classname; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Register a step in the automation engine. |
| 210 | * |
| 211 | * @since 6.2.0 |
| 212 | * |
| 213 | * @param string $class_name The name of the class in which the step should belong. |
| 214 | * |
| 215 | * @throws Automation_Exception Throws an exception if the step class does not exist. |
| 216 | */ |
| 217 | public function register_step( string $class_name ) { |
| 218 | if ( ! class_exists( $class_name ) ) { |
| 219 | throw new Automation_Exception( |
| 220 | /* Translators: %s is the name of the step class that does not exist. */ |
| 221 | sprintf( __( 'Step class %s does not exist', 'zero-bs-crm' ), $class_name ), |
| 222 | Step_Exception::DO_NOT_EXIST |
| 223 | ); |
| 224 | } |
| 225 | |
| 226 | if ( ! in_array( Step::class, class_implements( $class_name ), true ) ) { |
| 227 | throw new Automation_Exception( |
| 228 | sprintf( 'Step class %s does not implement the Base_Step interface', $class_name ), |
| 229 | Step_Exception::DO_NOT_EXTEND_BASE |
| 230 | ); |
| 231 | } |
| 232 | |
| 233 | $step_slug = $class_name::get_slug(); |
| 234 | $this->steps_map[ $step_slug ] = $class_name; |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Get a step class by name. |
| 239 | * |
| 240 | * @since 6.2.0 |
| 241 | * |
| 242 | * @param string $step_name The name of the step whose class we will be retrieving. |
| 243 | * @return string The name of the step class. |
| 244 | * |
| 245 | * @throws Automation_Exception Throws an exception if the step class does not exist. |
| 246 | */ |
| 247 | public function get_step_class( string $step_name ): string { |
| 248 | if ( ! isset( $this->steps_map[ $step_name ] ) ) { |
| 249 | throw new Automation_Exception( |
| 250 | /* Translators: %s is the name of the step class that does not exist. */ |
| 251 | sprintf( __( 'Step %s does not exist', 'zero-bs-crm' ), $step_name ), |
| 252 | Automation_Exception::STEP_CLASS_NOT_FOUND |
| 253 | ); |
| 254 | } |
| 255 | return $this->steps_map[ $step_name ]; |
| 256 | } |
| 257 | |
| 258 | /** |
| 259 | * Add a workflow. |
| 260 | * |
| 261 | * @since 6.2.0 |
| 262 | * |
| 263 | * @param Automation_Workflow $workflow The workflow class instance to be added. |
| 264 | * @param bool $init_workflow Whether or not to initialize the workflow. |
| 265 | * |
| 266 | * @throws Workflow_Exception Throws an exception if the workflow is not valid. |
| 267 | */ |
| 268 | public function add_workflow( Automation_Workflow $workflow, bool $init_workflow = false ) { |
| 269 | $workflow->set_engine( $this ); |
| 270 | |
| 271 | $this->workflows[] = $workflow; |
| 272 | |
| 273 | if ( $init_workflow ) { |
| 274 | $workflow->init_triggers(); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Build and add a workflow. |
| 280 | * |
| 281 | * @since 6.2.0 |
| 282 | * |
| 283 | * @param array $workflow_data The workflow data to be added. |
| 284 | * @param bool $init_workflow Whether or not to initialize the workflow. |
| 285 | * @return Automation_Workflow The workflow class instance to be added. |
| 286 | * |
| 287 | * @throws Workflow_Exception Throws an exception if the workflow is not valid. |
| 288 | */ |
| 289 | public function build_add_workflow( array $workflow_data, bool $init_workflow = false ): Automation_Workflow { |
| 290 | $workflow = new Automation_Workflow( $workflow_data ); |
| 291 | $this->add_workflow( $workflow, $init_workflow ); |
| 292 | |
| 293 | return $workflow; |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Init automation workflows. |
| 298 | * |
| 299 | * @since 6.2.0 |
| 300 | * |
| 301 | * @throws Workflow_Exception Throws an exception if the workflow is not valid. |
| 302 | */ |
| 303 | public function init_workflows() { |
| 304 | |
| 305 | /** @var Automation_Workflow $workflow */ |
| 306 | foreach ( $this->workflows as $workflow ) { |
| 307 | $workflow->init_triggers(); |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * Execute workflow. |
| 313 | * |
| 314 | * @since 6.2.0 |
| 315 | * |
| 316 | * @param Automation_Workflow $workflow The workflow to be executed. |
| 317 | * @param Trigger $trigger The trigger that started the execution process. |
| 318 | * @param Data_Type $trigger_data_type The data that was passed along by the trigger. |
| 319 | * @return bool |
| 320 | * |
| 321 | * @throws Automation_Exception Throws exception if an error executing the workflow. |
| 322 | * @throws Data_Transformer_Exception Throws exception if an error transforming the data. |
| 323 | */ |
| 324 | public function execute_workflow( Automation_Workflow $workflow, Trigger $trigger, Data_Type $trigger_data_type ): bool { |
| 325 | $this->get_logger()->log( sprintf( 'Trigger activated: %s', $trigger->get_slug() ) ); |
| 326 | $this->get_logger()->log( sprintf( 'Executing workflow: %s', $workflow->name ) ); |
| 327 | |
| 328 | $step_data = $workflow->get_initial_step(); |
| 329 | |
| 330 | while ( $step_data ) { |
| 331 | try { |
| 332 | $step_class = $step_data['class_name'] ?? $this->get_step_class( $step_data['slug'] ); |
| 333 | |
| 334 | if ( ! class_exists( $step_class ) ) { |
| 335 | throw new Automation_Exception( |
| 336 | /* Translators: %s is the name of the step class that does not exist. */ |
| 337 | sprintf( __( 'The step class %s does not exist.', 'zero-bs-crm' ), $step_class ), |
| 338 | Automation_Exception::STEP_CLASS_NOT_FOUND |
| 339 | ); |
| 340 | } |
| 341 | |
| 342 | /** @var Step $step */ |
| 343 | $step = new $step_class( $step_data ); |
| 344 | |
| 345 | $step_slug = $step->get_slug(); |
| 346 | |
| 347 | $this->get_logger()->log( '[' . $step->get_slug() . '] Executing step. Type: ' . $step::get_data_type() ); |
| 348 | |
| 349 | $data_type = $this->maybe_transform_data_type( $trigger_data_type, $step::get_data_type() ); |
| 350 | |
| 351 | $step->validate_and_execute( $data_type ); |
| 352 | |
| 353 | // todo: return Step instance instead of array |
| 354 | $step_id = $step->get_next_step_id(); |
| 355 | $step_data = $workflow->get_step( $step_id ); |
| 356 | |
| 357 | $this->get_logger()->log( '[' . $step->get_slug() . '] Step executed!' ); |
| 358 | |
| 359 | if ( ! $step_data ) { |
| 360 | $this->get_logger()->log( 'Workflow execution finished: No more steps found.' ); |
| 361 | return true; |
| 362 | } |
| 363 | } catch ( Automation_Exception $automation_exception ) { |
| 364 | |
| 365 | $this->get_logger()->log( 'Error executing the workflow on step: ' . $step_slug . ' - ' . $automation_exception->getMessage() ); |
| 366 | |
| 367 | throw $automation_exception; |
| 368 | } catch ( Data_Transformer_Exception $transformer_exception ) { |
| 369 | $this->get_logger()->log( 'Error executing the workflow on step ' . $step_slug . '. Transformer error: ' . $transformer_exception->getMessage() ); |
| 370 | |
| 371 | throw $transformer_exception; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | return false; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * Maybe transform data type. |
| 380 | * |
| 381 | * @since 6.2.0 |
| 382 | * |
| 383 | * @param Data_Type $data_type The current data type. |
| 384 | * @param string $new_data_type_class The new data type to transform the data to. |
| 385 | * @return Data_Type The transformed data type. |
| 386 | * |
| 387 | * @throws Data_Transformer_Exception Throws an exception if the data type cannot be transformed. |
| 388 | */ |
| 389 | protected function maybe_transform_data_type( Data_Type $data_type, string $new_data_type_class ): Data_Type_Base { |
| 390 | |
| 391 | // Bail early if we do not have to transform the data. |
| 392 | if ( $data_type instanceof $new_data_type_class ) { |
| 393 | return $data_type; |
| 394 | } |
| 395 | |
| 396 | $data_type_class = get_class( $data_type ); |
| 397 | |
| 398 | if ( ! isset( $this->data_transform_map[ $data_type_class ][ $new_data_type_class ] ) ) { |
| 399 | throw new Data_Transformer_Exception( |
| 400 | sprintf( 'Transforming from "%s" to "%s" is not supported', $data_type_class, $new_data_type_class ), |
| 401 | Data_Transformer_Exception::TRANSFORM_IS_NOT_SUPPORTED |
| 402 | ); |
| 403 | } |
| 404 | |
| 405 | $transformer = new $this->data_transform_map[ $data_type_class ][ $new_data_type_class ](); |
| 406 | |
| 407 | return $transformer->transform( $data_type ); |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * Get a step instance. |
| 412 | * |
| 413 | * @since 6.2.0 |
| 414 | * |
| 415 | * @param array $step_data The step data hydrate the step with. |
| 416 | * @return Step A step class instance. |
| 417 | * |
| 418 | * @throws Automation_Exception Throws an exception if the step class does not exist. |
| 419 | */ |
| 420 | public function get_registered_step( array $step_data ): Step { |
| 421 | |
| 422 | $step_class = $this->get_step_class( $step_data['slug'] ); |
| 423 | |
| 424 | if ( ! class_exists( $step_class ) ) { |
| 425 | throw new Automation_Exception( |
| 426 | /* Translators: %s is the name of the step class that does not exist. */ |
| 427 | sprintf( __( 'Step class %s does not exist', 'zero-bs-crm' ), $step_class ), |
| 428 | Automation_Exception::STEP_CLASS_NOT_FOUND |
| 429 | ); |
| 430 | } |
| 431 | |
| 432 | return new $step_class( $step_data ); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * Get registered steps. |
| 437 | * |
| 438 | * @since 6.2.0 |
| 439 | * |
| 440 | * @return string[] The registered steps. |
| 441 | */ |
| 442 | public function get_registered_steps(): array { |
| 443 | return $this->steps_map; |
| 444 | } |
| 445 | |
| 446 | /** |
| 447 | * Get trigger instance. |
| 448 | * |
| 449 | * @since 6.2.0 |
| 450 | * |
| 451 | * @param string $trigger_slug The name of the trigger slug with which to retrieve the trigger class. |
| 452 | * @return string The name of the trigger class. |
| 453 | * |
| 454 | * @throws Automation_Exception Throws an exception if the step class does not exist. |
| 455 | */ |
| 456 | public function get_trigger_class( string $trigger_slug ): string { |
| 457 | |
| 458 | if ( ! isset( $this->triggers_map[ $trigger_slug ] ) ) { |
| 459 | throw new Automation_Exception( |
| 460 | /* Translators: %s is the name of the step class that does not exist. */ |
| 461 | sprintf( __( 'Trigger %s does not exist', 'zero-bs-crm' ), $trigger_slug ), |
| 462 | Automation_Exception::TRIGGER_CLASS_NOT_FOUND |
| 463 | ); |
| 464 | } |
| 465 | |
| 466 | return $this->triggers_map[ $trigger_slug ]; |
| 467 | } |
| 468 | |
| 469 | /** |
| 470 | * Get Automation logger. |
| 471 | * |
| 472 | * @since 6.2.0 |
| 473 | * |
| 474 | * @return Automation_Logger Return an instance of the Automation_Logger class. |
| 475 | */ |
| 476 | public function get_logger(): Automation_Logger { |
| 477 | return $this->automation_logger ?? Automation_Logger::instance(); |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * Get the registered triggers. |
| 482 | * |
| 483 | * @since 6.2.0 |
| 484 | * |
| 485 | * @return string[] The registered triggers. |
| 486 | */ |
| 487 | public function get_registered_triggers(): array { |
| 488 | return $this->triggers_map; |
| 489 | } |
| 490 | } |