<?php



class WP_Font_Library {

	
	private $collections = array();

	
	private static $instance = null;

	
	public function register_font_collection( string $slug, array $args ) {
		$new_collection = new WP_Font_Collection( $slug, $args );

		if ( $this->is_collection_registered( $new_collection->slug ) ) {
			$error_message = sprintf(
				/* translators: %s: Font collection slug. */
				__( 'Font collection with slug: "%s" is already registered.' ),
				$new_collection->slug
			);
			_doing_it_wrong(
				__METHOD__,
				$error_message,
				'6.5.0'
			);
			return new WP_Error( 'font_collection_registration_error', $error_message );
		}
		$this->collections[ $new_collection->slug ] = $new_collection;
		return $new_collection;
	}

	
	public function unregister_font_collection( string $slug ) {
		if ( ! $this->is_collection_registered( $slug ) ) {
			_doing_it_wrong(
				__METHOD__,
				/* translators: %s: Font collection slug. */
				sprintf( __( 'Font collection "%s" not found.' ), $slug ),
				'6.5.0'
			);
			return false;
		}
		unset( $this->collections[ $slug ] );
		return true;
	}

	
	private function is_collection_registered( string $slug ) {
		return array_key_exists( $slug, $this->collections );
	}

	
	public function get_font_collections() {
		return $this->collections;
	}

	
	public function get_font_collection( string $slug ) {
		if ( $this->is_collection_registered( $slug ) ) {
			return $this->collections[ $slug ];
		}
		return null;
	}

	
	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}

		return self::$instance;
	}
}