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| <?php | |
| namespace EntitySchema\Services\Diff; | |
| use Diff\DiffOp\Diff\Diff; | |
| use Diff\DiffOp\DiffOpAdd; | |
| use Diff\DiffOp\DiffOpChange; | |
| use Diff\DiffOp\DiffOpRemove; | |
| use Diff\Patcher\PatcherException; | |
| /** | |
| * Copied and adjusted from wikibase/data-model; | |
| * originally authored by Thiemo Kreuz and Jeroen De Dauw | |
| * | |
| * @license GPL-2.0-or-later | |
| */ | |
| class AliasGroupListPatcher { | |
| /** | |
| * @throws PatcherException | |
| */ | |
| public function patchAliasGroupList( array $groups, Diff $patch = null ): array { | |
| if ( $patch === null ) { | |
| return $groups; | |
| } | |
| foreach ( $patch as $lang => $diffOp ) { | |
| $groups = $this->applyAliasGroupDiff( $groups, $lang, $diffOp ); | |
| } | |
| return $groups; | |
| } | |
| /** | |
| * @param array $groups | |
| * @param string $lang | |
| * @param Diff $patch | |
| * | |
| * @return array | |
| */ | |
| private function applyAliasGroupDiff( array $groups, $lang, Diff $patch ) { | |
| $hasLang = !empty( $groups[$lang] ); | |
| if ( $hasLang || !$this->containsOperationsOnOldValues( $patch ) ) { | |
| $aliases = $hasLang ? $groups[$lang] : []; | |
| $aliases = $this->getPatchedAliases( $aliases, $patch ); | |
| $groups[$lang] = $aliases; | |
| } | |
| return $groups; | |
| } | |
| /** | |
| * @param Diff $diff | |
| * | |
| * @return bool | |
| */ | |
| private function containsOperationsOnOldValues( Diff $diff ) { | |
| return $diff->getChanges() !== [] | |
| || $diff->getRemovals() !== []; | |
| } | |
| /** | |
| * @see ListPatcher | |
| * | |
| * @param string[] $aliases | |
| * @param Diff $patch | |
| * | |
| * @throws PatcherException | |
| * @return string[] | |
| */ | |
| private function getPatchedAliases( array $aliases, Diff $patch ) { | |
| foreach ( $patch as $diffOp ) { | |
| switch ( true ) { | |
| case $diffOp instanceof DiffOpAdd: | |
| $aliases[] = $diffOp->getNewValue(); | |
| break; | |
| case $diffOp instanceof DiffOpChange: | |
| $key = array_search( $diffOp->getOldValue(), $aliases, true ); | |
| if ( $key !== false ) { | |
| unset( $aliases[$key] ); | |
| $aliases[] = $diffOp->getNewValue(); | |
| } | |
| break; | |
| case $diffOp instanceof DiffOpRemove: | |
| $key = array_search( $diffOp->getOldValue(), $aliases, true ); | |
| if ( $key !== false ) { | |
| unset( $aliases[$key] ); | |
| } | |
| break; | |
| default: | |
| throw new PatcherException( 'Invalid aliases diff' ); | |
| } | |
| } | |
| return array_values( $aliases ); | |
| } | |
| } |