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<?php |
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namespace Wikibase\DataModel\Services\Diff\Internal; |
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use Diff\DiffOp\Diff\Diff; |
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use Diff\DiffOp\DiffOp; |
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use Diff\DiffOp\DiffOpAdd; |
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use Diff\DiffOp\DiffOpChange; |
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use Diff\DiffOp\DiffOpRemove; |
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use Diff\Patcher\MapPatcher; |
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use Diff\Patcher\PatcherException; |
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use Wikibase\DataModel\Term\AliasGroupList; |
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/** |
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* Package private. |
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* |
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* @since 3.6 |
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* |
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* @license GPL-2.0+ |
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* @author Jeroen De Dauw < [email protected] > |
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* @author Thiemo Mättig |
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*/ |
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class AliasGroupListPatcher { |
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/** |
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* @since 3.6 |
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* |
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* @param AliasGroupList $groups |
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* @param Diff $patch |
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* |
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* @throws PatcherException |
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*/ |
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public function patchAliasGroupList( AliasGroupList $groups, Diff $patch ) { |
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foreach ( $patch as $lang => $diffOp ) { |
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$this->patchAliasGroup( $groups, $lang, $diffOp ); |
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} |
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} |
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/** |
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* @see MapPatcher |
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* |
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* @param AliasGroupList $groups |
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* @param string $lang |
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* @param DiffOp $diffOp |
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* |
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* @throws PatcherException |
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*/ |
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private function patchAliasGroup( AliasGroupList $groups, $lang, DiffOp $diffOp ) { |
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$hasLang = $groups->hasGroupForLanguage( $lang ); |
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switch ( true ) { |
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case $diffOp instanceof DiffOpAdd: |
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/** @var $diffOp DiffOpAdd */ |
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if ( !$hasLang ) { |
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$groups->setAliasesForLanguage( $lang, $diffOp->getNewValue() ); |
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} |
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break; |
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case $diffOp instanceof DiffOpChange: |
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/** @var $diffOp DiffOpChange */ |
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$this->applyAliasGroupChange( $groups, $lang, $diffOp ); |
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break; |
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case $diffOp instanceof DiffOpRemove: |
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/** @var $diffOp DiffOpRemove */ |
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if ( $hasLang |
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&& $groups->getByLanguage( $lang )->getAliases() === $diffOp->getOldValue() |
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) { |
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$groups->removeByLanguage( $lang ); |
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} |
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break; |
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case $diffOp instanceof Diff: |
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/** @var $diffOp Diff */ |
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$this->applyAliasGroupDiff( $groups, $lang, $diffOp ); |
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break; |
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default: |
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throw new PatcherException( 'Invalid aliases diff' ); |
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} |
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} |
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/** |
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* @param AliasGroupList $groups |
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* @param string $lang |
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* @param DiffOpChange $patch |
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*/ |
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private function applyAliasGroupChange( AliasGroupList $groups, $lang, DiffOpChange $patch ) { |
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if ( $groups->hasGroupForLanguage( $lang ) |
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&& $groups->getByLanguage( $lang )->getAliases() === $patch->getOldValue() |
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) { |
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$groups->setAliasesForLanguage( $lang, $patch->getNewValue() ); |
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} |
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} |
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/** |
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* @param AliasGroupList $groups |
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* @param string $lang |
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* @param Diff $patch |
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*/ |
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private function applyAliasGroupDiff( AliasGroupList $groups, $lang, Diff $patch ) { |
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$hasLang = $groups->hasGroupForLanguage( $lang ); |
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if ( $hasLang || !$this->containsOperationsOnOldValues( $patch ) ) { |
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$aliases = $hasLang ? $groups->getByLanguage( $lang )->getAliases() : array(); |
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$aliases = $this->getPatchedAliases( $aliases, $patch ); |
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$groups->setAliasesForLanguage( $lang, $aliases ); |
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} |
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} |
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/** |
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* @param Diff $diff |
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* |
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* @return bool |
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*/ |
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private function containsOperationsOnOldValues( Diff $diff ) { |
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return $diff->getChanges() !== array() |
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|| $diff->getRemovals() !== array(); |
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} |
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/** |
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* @see ListPatcher |
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* |
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* @param string[] $aliases |
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* @param Diff $patch |
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* |
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* @throws PatcherException |
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* @return string[] |
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*/ |
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private function getPatchedAliases( array $aliases, Diff $patch ) { |
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foreach ( $patch as $diffOp ) { |
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switch ( true ) { |
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case $diffOp instanceof DiffOpAdd: |
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/** @var $diffOp DiffOpAdd */ |
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$aliases[] = $diffOp->getNewValue(); |
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break; |
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case $diffOp instanceof DiffOpChange: |
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/** @var $diffOp DiffOpChange */ |
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$key = array_search( $diffOp->getOldValue(), $aliases, true ); |
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if ( $key !== false ) { |
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unset( $aliases[$key] ); |
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$aliases[] = $diffOp->getNewValue(); |
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} |
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break; |
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case $diffOp instanceof DiffOpRemove: |
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/** @var $diffOp DiffOpRemove */ |
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$key = array_search( $diffOp->getOldValue(), $aliases, true ); |
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if ( $key !== false ) { |
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unset( $aliases[$key] ); |
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} |
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break; |
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default: |
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throw new PatcherException( 'Invalid aliases diff' ); |
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} |
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} |
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return $aliases; |
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} |
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} |
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wmde /
WikibaseDataModelServices
