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<?php |
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/** |
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* @package Polylang |
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*/ |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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/** |
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* Elects a single "leader" among the add-ons' updaters. |
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* |
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* Several add-ons can run at once, each carrying its own namespaced copy of the updater, isolated from the others. |
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* This registry lives in core as the single point they all share, and only arbitrates which updater is the leader. |
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* HTTP and license logic stay in the package. |
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* |
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* @since 3.9 |
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*/ |
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class PLL_Updater_Registry { |
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|
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/** |
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* The registered updaters. On equal versions, the first registered wins. |
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* |
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* @var PLL_Updater_Interface[] |
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*/ |
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private static $candidates = array(); |
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|
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/** |
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* Announces an updater to the registry. Called from each add-on's Updater constructor. |
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* |
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* @since 3.9 |
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* |
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* @param PLL_Updater_Interface $updater The add-on's updater. |
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* @return void |
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*/ |
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public static function register( PLL_Updater_Interface $updater ): void { |
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add_action( 'pll_init', array( self::class, 'elect' ), 0 ); |
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|
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self::$candidates[] = $updater; |
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} |
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|
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/** |
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* Elects the highest-version updater and runs its setup once. Hooked to `pll_init`. |
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* |
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* @since 3.9 |
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* |
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* @param PLL_Base $polylang Polylang object. |
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* @return void |
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*/ |
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public static function elect( PLL_Base $polylang ): void { |
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$elected = null; |
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|
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foreach ( self::$candidates as $candidate ) { |
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if ( null === $elected || version_compare( $candidate::get_version(), $elected::get_version(), '>' ) ) { |
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$elected = $candidate; |
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} |
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} |
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|
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if ( null !== $elected ) { |
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$elected->init( $polylang ); |
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} |
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} |
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} |
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|
