3 * Represents a filter (used on ChangesListSpecialPage and descendants)
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22 * @author Matthew Flaschen
26 * Represents a filter (used on ChangesListSpecialPage and descendants)
30 abstract class ChangesListFilter
{
39 * CSS class suffix used for attribution, e.g. 'bot'.
41 * In this example, if bot actions are included in the result set, this CSS class
42 * will then be included in all bot-flagged actions.
44 * @var string|null $cssClassSuffix
46 protected $cssClassSuffix;
49 * Callable that returns true if and only if a row is attributed to this filter
51 * @var callable $isRowApplicableCallable
53 protected $isRowApplicableCallable;
56 * Group. ChangesListFilterGroup this belongs to
58 * @var ChangesListFilterGroup $group
63 * i18n key of label for structured UI
70 * i18n key of description for structured UI
72 * @var string $description
74 protected $description;
77 * Array of associative arrays with conflict information. See
78 * setUnidirectionalConflict
80 * @var array $conflictingGroups
82 protected $conflictingGroups = [];
85 * Array of associative arrays with conflict information. See
86 * setUnidirectionalConflict
88 * @var array $conflictingFilters
90 protected $conflictingFilters = [];
93 * Array of associative arrays with subset information
95 * @var array $subsetFilters
97 protected $subsetFilters = [];
100 * Priority integer. Higher value means higher up in the group's filter list.
102 * @var string $priority
108 * @var string $defaultHighlightColor
110 protected $defaultHighlightColor;
112 const RESERVED_NAME_CHAR
= '_';
115 * Creates a new filter with the specified configuration, and registers it to the
118 * It infers which UI (it can be either or both) to display the filter on based on
119 * which messages are provided.
121 * If 'label' is provided, it will be displayed on the structured UI. Thus,
122 * 'label', 'description', and sub-class parameters are optional depending on which
125 * @param array $filterDefinition ChangesListFilter definition
126 * * $filterDefinition['name'] string Name of filter; use lowercase with no
128 * * $filterDefinition['cssClassSuffix'] string CSS class suffix, used to mark
129 * that a particular row belongs to this filter (when a row is included by the
131 * * $filterDefinition['isRowApplicableCallable'] Callable taking two parameters, the
132 * IContextSource, and the RecentChange object for the row, and returning true if
133 * the row is attributed to this filter. The above CSS class will then be
134 * automatically added (optional, required if cssClassSuffix is used).
135 * * $filterDefinition['group'] ChangesListFilterGroup Group. Filter group this
137 * * $filterDefinition['label'] string i18n key of label for structured UI.
138 * * $filterDefinition['description'] string i18n key of description for structured
140 * * $filterDefinition['priority'] int Priority integer. Higher value means higher
141 * up in the group's filter list.
143 public function __construct( array $filterDefinition ) {
144 if ( isset( $filterDefinition['group'] ) ) {
145 $this->group
= $filterDefinition['group'];
147 throw new MWException( 'You must use \'group\' to specify the ' .
148 'ChangesListFilterGroup this filter belongs to' );
151 if ( strpos( $filterDefinition['name'], self
::RESERVED_NAME_CHAR
) !== false ) {
152 throw new MWException( 'Filter names may not contain \'' .
153 self
::RESERVED_NAME_CHAR
.
154 '\'. Use the naming convention: \'lowercase\''
158 if ( $this->group
->getFilter( $filterDefinition['name'] ) ) {
159 throw new MWException( 'Two filters in a group cannot have the ' .
160 "same name: '{$filterDefinition['name']}'" );
163 $this->name
= $filterDefinition['name'];
165 if ( isset( $filterDefinition['cssClassSuffix'] ) ) {
166 $this->cssClassSuffix
= $filterDefinition['cssClassSuffix'];
167 $this->isRowApplicableCallable
= $filterDefinition['isRowApplicableCallable'];
170 if ( isset( $filterDefinition['label'] ) ) {
171 $this->label
= $filterDefinition['label'];
172 $this->description
= $filterDefinition['description'];
175 $this->priority
= $filterDefinition['priority'];
177 $this->group
->registerFilter( $this );
181 * Marks that the given ChangesListFilterGroup or ChangesListFilter conflicts with this object.
183 * WARNING: This means there is a conflict when both things are *shown*
184 * (not filtered out), even for the hide-based filters. So e.g. conflicting with
185 * 'hideanons' means there is a conflict if only anonymous users are *shown*.
187 * @param ChangesListFilterGroup|ChangesListFilter $other Other
188 * ChangesListFilterGroup or ChangesListFilter
189 * @param string $globalKey i18n key for top-level conflict message
190 * @param string $forwardKey i18n key for conflict message in this
191 * direction (when in UI context of $this object)
192 * @param string $backwardKey i18n key for conflict message in reverse
193 * direction (when in UI context of $other object)
195 public function conflictsWith( $other, $globalKey, $forwardKey, $backwardKey ) {
196 if ( $globalKey === null ||
$forwardKey === null ||
$backwardKey === null ) {
197 throw new MWException( 'All messages must be specified' );
200 $this->setUnidirectionalConflict(
206 $other->setUnidirectionalConflict(
214 * Marks that the given ChangesListFilterGroup or ChangesListFilter conflicts with
219 * @param ChangesListFilterGroup|ChangesListFilter $other Other
220 * ChangesListFilterGroup or ChangesListFilter
221 * @param string $globalDescription i18n key for top-level conflict message
222 * @param string $contextDescription i18n key for conflict message in this
223 * direction (when in UI context of $this object)
225 public function setUnidirectionalConflict( $other, $globalDescription, $contextDescription ) {
226 if ( $other instanceof ChangesListFilterGroup
) {
227 $this->conflictingGroups
[] = [
228 'group' => $other->getName(),
229 'groupObject' => $other,
230 'globalDescription' => $globalDescription,
231 'contextDescription' => $contextDescription,
233 } elseif ( $other instanceof ChangesListFilter
) {
234 $this->conflictingFilters
[] = [
235 'group' => $other->getGroup()->getName(),
236 'filter' => $other->getName(),
237 'filterObject' => $other,
238 'globalDescription' => $globalDescription,
239 'contextDescription' => $contextDescription,
242 throw new MWException( 'You can only pass in a ChangesListFilterGroup or a ChangesListFilter' );
247 * Marks that the current instance is (also) a superset of the filter passed in.
248 * This can be called more than once.
250 * This means that anything in the results for the other filter is also in the
251 * results for this one.
253 * @param ChangesListFilter $other The filter the current instance is a superset of
255 public function setAsSupersetOf( ChangesListFilter
$other ) {
256 if ( $other->getGroup() !== $this->getGroup() ) {
257 throw new MWException( 'Supersets can only be defined for filters in the same group' );
260 $this->subsetFilters
[] = [
261 // It's always the same group, but this makes the representation
262 // more consistent with conflicts.
263 'group' => $other->getGroup()->getName(),
264 'filter' => $other->getName(),
269 * @return string Name, e.g. hideanons
271 public function getName() {
276 * @return ChangesListFilterGroup Group this belongs to
278 public function getGroup() {
283 * @return string i18n key of label for structured UI
285 public function getLabel() {
290 * @return string i18n key of description for structured UI
292 public function getDescription() {
293 return $this->description
;
297 * Checks whether the filter should display on the unstructured UI
299 * @return bool Whether to display
301 abstract public function displaysOnUnstructuredUi();
304 * Checks whether the filter should display on the structured UI
305 * This refers to the exact filter. See also isFeatureAvailableOnStructuredUi.
307 * @return bool Whether to display
309 public function displaysOnStructuredUi() {
310 return $this->label
!== null;
314 * Checks whether an equivalent feature for this filter is available on the
317 * This can either be the exact filter, or a new filter that replaces it.
320 public function isFeatureAvailableOnStructuredUi() {
321 return $this->displaysOnStructuredUi();
325 * @return int Priority. Higher value means higher up in the group list
327 public function getPriority() {
328 return $this->priority
;
334 * @return string|null CSS class, or null if not defined
336 protected function getCssClass() {
337 if ( $this->cssClassSuffix
!== null ) {
338 return ChangesList
::CSS_CLASS_PREFIX
. $this->cssClassSuffix
;
345 * Add CSS class if needed
347 * @param IContextSource $ctx Context source
348 * @param RecentChange $rc Recent changes object
349 * @param array &$classes Non-associative array of CSS class names; appended to if needed
351 public function applyCssClassIfNeeded( IContextSource
$ctx, RecentChange
$rc, array &$classes ) {
352 if ( $this->isRowApplicableCallable
=== null ) {
356 if ( call_user_func( $this->isRowApplicableCallable
, $ctx, $rc ) ) {
357 $classes[] = $this->getCssClass();
362 * Gets the JS data required by the front-end of the structured UI
364 * @return array Associative array Data required by the front-end. messageKeys is
365 * a special top-level value, with the value being an array of the message keys to
366 * send to the client.
368 public function getJsData() {
370 'name' => $this->getName(),
371 'label' => $this->getLabel(),
372 'description' => $this->getDescription(),
373 'cssClass' => $this->getCssClass(),
374 'priority' => $this->priority
,
375 'subset' => $this->subsetFilters
,
377 'defaultHighlightColor' => $this->defaultHighlightColor
380 $output['messageKeys'] = [
382 $this->getDescription(),
385 $conflicts = array_merge(
386 $this->conflictingGroups
,
387 $this->conflictingFilters
390 foreach ( $conflicts as $conflictInfo ) {
391 unset( $conflictInfo['filterObject'] );
392 unset( $conflictInfo['groupObject'] );
393 $output['conflicts'][] = $conflictInfo;
395 $output['messageKeys'],
396 $conflictInfo['globalDescription'],
397 $conflictInfo['contextDescription']
405 * Checks whether this filter is selected in the provided options
407 * @param FormOptions $opts
410 abstract public function isSelected( FormOptions
$opts );
413 * Get groups conflicting with this filter
415 * @return ChangesListFilterGroup[]
417 public function getConflictingGroups() {
419 function ( $conflictDesc ) {
420 return $conflictDesc[ 'groupObject' ];
422 $this->conflictingGroups
427 * Get filters conflicting with this filter
429 * @return ChangesListFilter[]
431 public function getConflictingFilters() {
433 function ( $conflictDesc ) {
434 return $conflictDesc[ 'filterObject' ];
436 $this->conflictingFilters
441 * Check if the conflict with a group is currently "active"
443 * @param ChangesListFilterGroup $group
444 * @param FormOptions $opts
447 public function activelyInConflictWithGroup( ChangesListFilterGroup
$group, FormOptions
$opts ) {
448 if ( $group->anySelected( $opts ) && $this->isSelected( $opts ) ) {
449 /** @var ChangesListFilter $siblingFilter */
450 foreach ( $this->getSiblings() as $siblingFilter ) {
451 if ( $siblingFilter->isSelected( $opts ) && !$siblingFilter->hasConflictWithGroup( $group ) ) {
460 private function hasConflictWithGroup( ChangesListFilterGroup
$group ) {
461 return in_array( $group, $this->getConflictingGroups() );
465 * Check if the conflict with a filter is currently "active"
467 * @param ChangesListFilter $filter
468 * @param FormOptions $opts
471 public function activelyInConflictWithFilter( ChangeslistFilter
$filter, FormOptions
$opts ) {
472 if ( $this->isSelected( $opts ) && $filter->isSelected( $opts ) ) {
473 /** @var ChangesListFilter $siblingFilter */
474 foreach ( $this->getSiblings() as $siblingFilter ) {
476 $siblingFilter->isSelected( $opts ) &&
477 !$siblingFilter->hasConflictWithFilter( $filter )
487 private function hasConflictWithFilter( ChangeslistFilter
$filter ) {
488 return in_array( $filter, $this->getConflictingFilters() );
492 * Get filters in the same group
494 * @return ChangesListFilter[]
496 protected function getSiblings() {
498 $this->getGroup()->getFilters(),
499 function ( $filter ) {
500 return $filter !== $this;
506 * @param string $defaultHighlightColor
508 public function setDefaultHighlightColor( $defaultHighlightColor ) {
509 $this->defaultHighlightColor
= $defaultHighlightColor;