?<h3>D¨ızenle: class-wp-block-templates-registry.php</h3>
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/**
 * Templates registry functions.
 *
 * @package WordPress
 * @since 6.7.0
 */

/**
 * Core class used for interacting with templates.
 *
 * @since 6.7.0
 */
final class WP_Block_Templates_Registry {
	/**
	 * Registered templates, as `$name =&gt; $instance` pairs.
	 *
	 * @since 6.7.0
	 * @var WP_Block_Template[] $registered_block_templates Registered templates.
	 */
	private $registered_templates = array();

	/**
	 * Container for the main instance of the class.
	 *
	 * @since 6.7.0
	 * @var WP_Block_Templates_Registry|null
	 */
	private static $instance = null;

	/**
	 * Registers a template.
	 *
	 * @since 6.7.0
	 *
	 * @param string $template_name Template name including namespace.
	 * @param array  $args          Optional. Array of template arguments.
	 * @return WP_Block_Template|WP_Error The registered template on success, or WP_Error on failure.
	 */
	public function register( $template_name, $args = array() ) {

		$template = null;

		$error_message = &#039;&#039;;
		$error_code    = &#039;&#039;;

		if ( ! is_string( $template_name ) ) {
			$error_message = __( &#039;Template names must be strings.&#039; );
			$error_code    = &#039;template_name_no_string&#039;;
		} elseif ( preg_match( &#039;/[A-Z]+/&#039;, $template_name ) ) {
			$error_message = __( &#039;Template names must not contain uppercase characters.&#039; );
			$error_code    = &#039;template_name_no_uppercase&#039;;
		} elseif ( ! preg_match( &#039;/^[a-z0-9_\-]+\/\/[a-z0-9_\-]+$/&#039;, $template_name ) ) {
			$error_message = __( &#039;Template names must contain a namespace prefix. Example: my-plugin//my-custom-template&#039; );
			$error_code    = &#039;template_no_prefix&#039;;
		} elseif ( $this-&gt;is_registered( $template_name ) ) {
			/* translators: %s: Template name. */
			$error_message = sprintf( __( &#039;Template &quot;%s&quot; is already registered.&#039; ), $template_name );
			$error_code    = &#039;template_already_registered&#039;;
		}

		if ( $error_message ) {
			_doing_it_wrong(
				__METHOD__,
				$error_message,
				&#039;6.7.0&#039;
			);
			return new WP_Error( $error_code, $error_message );
		}

		if ( ! $template ) {
			$theme_name             = get_stylesheet();
			list( $plugin, $slug )  = explode( &#039;//&#039;, $template_name );
			$default_template_types = get_default_block_template_types();

			$template              = new WP_Block_Template();
			$template-&gt;id          = $theme_name . &#039;//&#039; . $slug;
			$template-&gt;theme       = $theme_name;
			$template-&gt;plugin      = $plugin;
			$template-&gt;author      = null;
			$template-&gt;content     = isset( $args[&#039;content&#039;] ) ? $args[&#039;content&#039;] : &#039;&#039;;
			$template-&gt;source      = &#039;plugin&#039;;
			$template-&gt;slug        = $slug;
			$template-&gt;type        = &#039;wp_template&#039;;
			$template-&gt;title       = isset( $args[&#039;title&#039;] ) ? $args[&#039;title&#039;] : $template_name;
			$template-&gt;description = isset( $args[&#039;description&#039;] ) ? $args[&#039;description&#039;] : &#039;&#039;;
			$template-&gt;status      = &#039;publish&#039;;
			$template-&gt;origin      = &#039;plugin&#039;;
			$template-&gt;is_custom   = ! isset( $default_template_types[ $template_name ] );
			$template-&gt;post_types  = isset( $args[&#039;post_types&#039;] ) ? $args[&#039;post_types&#039;] : array();
		}

		$this-&gt;registered_templates[ $template_name ] = $template;

		return $template;
	}

	/**
	 * Retrieves all registered templates.
	 *
	 * @since 6.7.0
	 *
	 * @return WP_Block_Template[] Associative array of `$template_name =&gt; $template` pairs.
	 */
	public function get_all_registered() {
		return $this-&gt;registered_templates;
	}

	/**
	 * Retrieves a registered template by its name.
	 *
	 * @since 6.7.0
	 *
	 * @param string $template_name Template name including namespace.
	 * @return WP_Block_Template|null The registered template, or null if it is not registered.
	 */
	public function get_registered( $template_name ) {
		if ( ! $this-&gt;is_registered( $template_name ) ) {
			return null;
		}

		return $this-&gt;registered_templates[ $template_name ];
	}

	/**
	 * Retrieves a registered template by its slug.
	 *
	 * @since 6.7.0
	 *
	 * @param string $template_slug Slug of the template.
	 * @return WP_Block_Template|null The registered template, or null if it is not registered.
	 */
	public function get_by_slug( $template_slug ) {
		$all_templates = $this-&gt;get_all_registered();

		if ( ! $all_templates ) {
			return null;
		}

		foreach ( $all_templates as $template ) {
			if ( $template-&gt;slug === $template_slug ) {
				return $template;
			}
		}

		return null;
	}

	/**
	 * Retrieves registered templates matching a query.
	 *
	 * @since 6.7.0
	 *
	 * @param array  $query {
	 *     Arguments to retrieve templates. Optional, empty by default.
	 *
	 *     @type string[] $slug__in     List of slugs to include.
	 *     @type string[] $slug__not_in List of slugs to skip.
	 *     @type string   $post_type    Post type to get the templates for.
	 * }
	 * @return WP_Block_Template[] Associative array of `$template_name =&gt; $template` pairs.
	 */
	public function get_by_query( $query = array() ) {
		$all_templates = $this-&gt;get_all_registered();

		if ( ! $all_templates ) {
			return array();
		}

		$query            = wp_parse_args(
			$query,
			array(
				&#039;slug__in&#039;     =&gt; array(),
				&#039;slug__not_in&#039; =&gt; array(),
				&#039;post_type&#039;    =&gt; &#039;&#039;,
			)
		);
		$slugs_to_include = $query[&#039;slug__in&#039;];
		$slugs_to_skip    = $query[&#039;slug__not_in&#039;];
		$post_type        = $query[&#039;post_type&#039;];

		$matching_templates = array();
		foreach ( $all_templates as $template_name =&gt; $template ) {
			if ( $slugs_to_include &amp;&amp; ! in_array( $template-&gt;slug, $slugs_to_include, true ) ) {
				continue;
			}

			if ( $slugs_to_skip &amp;&amp; in_array( $template-&gt;slug, $slugs_to_skip, true ) ) {
				continue;
			}

			if ( $post_type &amp;&amp; ! in_array( $post_type, $template-&gt;post_types, true ) ) {
				continue;
			}

			$matching_templates[ $template_name ] = $template;
		}

		return $matching_templates;
	}

	/**
	 * Checks if a template is registered.
	 *
	 * @since 6.7.0
	 *
	 * @param string $template_name Template name.
	 * @return bool True if the template is registered, false otherwise.
	 */
	public function is_registered( $template_name ) {
		return isset( $this-&gt;registered_templates[ $template_name ] );
	}

	/**
	 * Unregisters a template.
	 *
	 * @since 6.7.0
	 *
	 * @param string $template_name Template name including namespace.
	 * @return WP_Block_Template|WP_Error The unregistered template on success, or WP_Error on failure.
	 */
	public function unregister( $template_name ) {
		if ( ! $this-&gt;is_registered( $template_name ) ) {
			_doing_it_wrong(
				__METHOD__,
				/* translators: %s: Template name. */
				sprintf( __( &#039;Template &quot;%s&quot; is not registered.&#039; ), $template_name ),
				&#039;6.7.0&#039;
			);
			/* translators: %s: Template name. */
			return new WP_Error( &#039;template_not_registered&#039;, __( &#039;Template &quot;%s&quot; is not registered.&#039; ) );
		}

		$unregistered_template = $this-&gt;registered_templates[ $template_name ];
		unset( $this-&gt;registered_templates[ $template_name ] );

		return $unregistered_template;
	}

	/**
	 * Utility method to retrieve the main instance of the class.
	 *
	 * The instance will be created if it does not exist yet.
	 *
	 * @since 6.7.0
	 *
	 * @return WP_Block_Templates_Registry The main instance.
	 */
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}
}
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