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| 1 | <?php |
| 2 | |
| 3 | namespace GrowthExperiments\NewcomerTasks\Task; |
| 4 | |
| 5 | use ArrayAccess; |
| 6 | use ArrayIterator; |
| 7 | use Countable; |
| 8 | use IteratorAggregate; |
| 9 | use LogicException; |
| 10 | use MediaWiki\Json\JsonUnserializable; |
| 11 | use MediaWiki\Json\JsonUnserializableTrait; |
| 12 | use MediaWiki\Json\JsonUnserializer; |
| 13 | use MediaWiki\Page\ProperPageIdentity; |
| 14 | use MediaWiki\Title\Title; |
| 15 | use OutOfBoundsException; |
| 16 | use Traversable; |
| 17 | use Wikimedia\Assert\Assert; |
| 18 | |
| 19 | /** |
| 20 | * A list of task suggestions, which constitute a slice of the total result set of suggestions. |
| 21 | * Used as a convenience class for queries with limit/offset to pass along some metadata |
| 22 | * about the full result set (such as offset or total result count). |
| 23 | */ |
| 24 | class TaskSet implements IteratorAggregate, Countable, ArrayAccess, JsonUnserializable { |
| 25 | |
| 26 | use JsonUnserializableTrait; |
| 27 | |
| 28 | /** @var Task[] */ |
| 29 | private $tasks; |
| 30 | |
| 31 | /** @var int Size of the full result set (can be larger than the size of this result set). */ |
| 32 | private $totalCount; |
| 33 | |
| 34 | /** @var int Offset within the full result set. */ |
| 35 | private $offset; |
| 36 | |
| 37 | /** @var array Arbitrary non-task-specific debug data */ |
| 38 | private $debugData = []; |
| 39 | |
| 40 | /** @var TaskSetFilters The task and topic filters used to generate this task set. */ |
| 41 | private $filters; |
| 42 | |
| 43 | /** @var array */ |
| 44 | private $qualityGateConfig = []; |
| 45 | |
| 46 | /** @var array Invalid tasks that are part of this task set. */ |
| 47 | private $invalidTasks = []; |
| 48 | |
| 49 | /** |
| 50 | * @param Task[] $tasks |
| 51 | * @param int $totalCount Size of the full result set |
| 52 | * (can be larger than the size of this result set). |
| 53 | * @param int $offset Offset within the full result set. |
| 54 | * @param TaskSetFilters $filters |
| 55 | * @param Task[] $invalidTasks Tasks that were part of the TaskSet, but are not considered valid. |
| 56 | */ |
| 57 | public function __construct( |
| 58 | array $tasks, $totalCount, $offset, TaskSetFilters $filters, array $invalidTasks = [] |
| 59 | ) { |
| 60 | Assert::parameterElementType( Task::class, $tasks, '$tasks' ); |
| 61 | $this->tasks = array_values( $tasks ); |
| 62 | $this->invalidTasks = array_values( $invalidTasks ); |
| 63 | $this->totalCount = $totalCount; |
| 64 | $this->offset = $offset; |
| 65 | $this->filters = $filters; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * @inheritDoc |
| 70 | * @phan-suppress-next-line PhanTypeMismatchDeclaredReturn |
| 71 | * @return Traversable|Task[] |
| 72 | */ |
| 73 | public function getIterator(): Traversable { |
| 74 | return new ArrayIterator( $this->tasks ); |
| 75 | } |
| 76 | |
| 77 | /** @inheritDoc */ |
| 78 | public function count(): int { |
| 79 | return count( $this->tasks ); |
| 80 | } |
| 81 | |
| 82 | /** @inheritDoc */ |
| 83 | public function offsetExists( $offset ): bool { |
| 84 | return array_key_exists( $offset, $this->tasks ); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * @param int $offset |
| 89 | * @return Task |
| 90 | */ |
| 91 | public function offsetGet( $offset ): Task { |
| 92 | if ( !array_key_exists( $offset, $this->tasks ) ) { |
| 93 | throw new OutOfBoundsException( "TaskSet does not have item $offset; max offset: " |
| 94 | . ( count( $this->tasks ) - 1 ) ); |
| 95 | } |
| 96 | return $this->tasks[$offset]; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * This method cannot be used. |
| 101 | * @param mixed $offset |
| 102 | * @param mixed $value |
| 103 | * @suppress PhanPluginNeverReturnMethod LSP violation |
| 104 | */ |
| 105 | public function offsetSet( $offset, $value ): void { |
| 106 | throw new LogicException( __CLASS__ . ' is read-only' ); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * This method cannot be used. |
| 111 | * @param mixed $offset |
| 112 | * @suppress PhanPluginNeverReturnMethod LSP violation |
| 113 | */ |
| 114 | public function offsetUnset( $offset ): void { |
| 115 | throw new LogicException( __CLASS__ . ' is read-only' ); |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Size of the full result set (can be larger than the size of this result set), minus any invalidated |
| 120 | * tasks in the task set. |
| 121 | * |
| 122 | * In other words, getTotalCount is the number of suggestions matching some set of conditions |
| 123 | * while the suggestions returned by iterating the TaskSet are the result of |
| 124 | * further restricting that set with some limit/offset. |
| 125 | * @return int |
| 126 | */ |
| 127 | public function getTotalCount() { |
| 128 | return $this->totalCount - count( $this->invalidTasks ); |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Offset within the full result set. |
| 133 | * @return int |
| 134 | */ |
| 135 | public function getOffset() { |
| 136 | return $this->offset; |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Get arbitrary non-task-specific debug data. |
| 141 | * @return array |
| 142 | */ |
| 143 | public function getDebugData(): array { |
| 144 | return $this->debugData; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Set arbitrary non-task-specific debug data. |
| 149 | * @param array $debugData |
| 150 | */ |
| 151 | public function setDebugData( array $debugData ): void { |
| 152 | $this->debugData = $debugData; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * @return TaskSetFilters |
| 157 | */ |
| 158 | public function getFilters(): TaskSetFilters { |
| 159 | return $this->filters; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Truncate the set of tasks. |
| 164 | * |
| 165 | * @param int $limit |
| 166 | */ |
| 167 | public function truncate( int $limit ): void { |
| 168 | if ( $this->count() ) { |
| 169 | $this->tasks = array_slice( $this->tasks, 0, $limit, true ); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Shuffle the tasks. |
| 175 | */ |
| 176 | public function randomSort(): void { |
| 177 | shuffle( $this->tasks ); |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Compare this TaskSet's filters with another set of filters. |
| 182 | * @param TaskSetFilters $filters |
| 183 | * @return bool |
| 184 | */ |
| 185 | public function filtersEqual( TaskSetFilters $filters ): bool { |
| 186 | return json_encode( $this->filters ) === json_encode( $filters ); |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * An array of data to be used in controllers (for now, just client-side in QualityGate.js) for enforcing |
| 191 | * quality gates. |
| 192 | * |
| 193 | * @see modules/ext.growthExperiments.Homepage.SuggestedEdits/QualityGate.js |
| 194 | * @return array Keys are task type IDs, values are arbitrary data to be used by controllers. |
| 195 | */ |
| 196 | public function getQualityGateConfig(): array { |
| 197 | return $this->qualityGateConfig; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * @param string $taskTypeId |
| 202 | * @param array $config |
| 203 | */ |
| 204 | public function setQualityGateConfigForTaskType( string $taskTypeId, array $config ): void { |
| 205 | $this->qualityGateConfig[$taskTypeId] = $config; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Set the quality gate data for a TaskSet. Useful when constructing a new TaskSet from an old one. |
| 210 | * |
| 211 | * @param array $config |
| 212 | */ |
| 213 | public function setQualityGateConfig( array $config ): void { |
| 214 | $this->qualityGateConfig = $config; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * @return Task[] |
| 219 | */ |
| 220 | public function getInvalidTasks(): array { |
| 221 | return $this->invalidTasks; |
| 222 | } |
| 223 | |
| 224 | /** @inheritDoc */ |
| 225 | protected function toJsonArray(): array { |
| 226 | # T312589 explicitly calling jsonSerialize() will be unnecessary |
| 227 | # in the future. |
| 228 | return [ |
| 229 | 'tasks' => array_map( static function ( Task $task ) { |
| 230 | return $task->jsonSerialize(); |
| 231 | }, $this->tasks ), |
| 232 | 'invalidTasks' => array_map( static function ( Task $task ) { |
| 233 | return $task->jsonSerialize(); |
| 234 | }, $this->invalidTasks ), |
| 235 | 'totalCount' => $this->totalCount, |
| 236 | 'offset' => $this->offset, |
| 237 | 'filters' => $this->filters->jsonSerialize(), |
| 238 | 'qualityGateConfig' => $this->qualityGateConfig, |
| 239 | // debug data is not worth serializing |
| 240 | ]; |
| 241 | } |
| 242 | |
| 243 | /** @inheritDoc */ |
| 244 | public static function newFromJsonArray( JsonUnserializer $unserializer, array $json ) { |
| 245 | # T312589: In the future JsonCodec will take care of unserializing |
| 246 | # the values in the $json array itself. |
| 247 | $tasks = array_map( static function ( $task ) use ( $unserializer ) { |
| 248 | return $task instanceof Task ? $task : |
| 249 | $unserializer->unserialize( $task, Task::class ); |
| 250 | }, $json['tasks'] ); |
| 251 | $invalidTasks = array_map( static function ( $task ) use ( $unserializer ) { |
| 252 | return $task instanceof Task ? $task : |
| 253 | $unserializer->unserialize( $task, Task::class ); |
| 254 | }, $json['invalidTasks'] ); |
| 255 | $filters = $json['filters'] instanceof TaskSetFilters ? |
| 256 | $json['filters'] : |
| 257 | $unserializer->unserialize( $json['filters'], TaskSetFilters::class ); |
| 258 | $taskSet = new self( $tasks, $json['totalCount'], $json['offset'], $filters, $invalidTasks ); |
| 259 | $taskSet->setQualityGateConfig( $json['qualityGateConfig'] ); |
| 260 | return $taskSet; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * Check whether the task set contains a task for the specified page |
| 265 | * |
| 266 | * @param ProperPageIdentity $page |
| 267 | * @return bool |
| 268 | */ |
| 269 | public function containsPage( ProperPageIdentity $page ): bool { |
| 270 | foreach ( $this->tasks as $task ) { |
| 271 | if ( Title::newFromLinkTarget( $task->getTitle() )->isSamePageAs( $page ) ) { |
| 272 | return true; |
| 273 | } |
| 274 | } |
| 275 | return false; |
| 276 | } |
| 277 | |
| 278 | } |