n get_root_layout_rules( $selector, $block_metadata ) {
		$css              = '';
		$settings         = _wp_array_get( $this->theme_json, array( 'settings' ) );
		$use_root_padding = isset( $this->theme_json['settings']['useRootPaddingAwareAlignments'] ) && true === $this->theme_json['settings']['useRootPaddingAwareAlignments'];

		/*
		* Reset default browser margin on the root body element.
		* This is set on the root selector **before** generating the ruleset
		* from the `theme.json`. This is to ensure that if the `theme.json` declares
		* `margin` in its `spacing` declaration for the `body` element then these
		* user-generated values take precedence in the CSS cascade.
		* @link https://github.com/WordPress/gutenberg/issues/36147.
		*/
		$css .= 'body { margin: 0;';

		/*
		* If there are content and wide widths in theme.json, output them
		* as custom properties on the body element so all blocks can use them.
		*/
		if ( isset( $settings['layout']['contentSize'] ) || isset( $settings['layout']['wideSize'] ) ) {
			$content_size = isset( $settings['layout']['contentSize'] ) ? $settings['layout']['contentSize'] : $settings['layout']['wideSize'];
			$content_size = static::is_safe_css_declaration( 'max-width', $content_size ) ? $content_size : 'initial';
			$wide_size    = isset( $settings['layout']['wideSize'] ) ? $settings['layout']['wideSize'] : $settings['layout']['contentSize'];
			$wide_size    = static::is_safe_css_declaration( 'max-width', $wide_size ) ? $wide_size : 'initial';
			$css         .= '--wp--style--global--content-size: ' . $content_size . ';';
			$css         .= '--wp--style--global--wide-size: ' . $wide_size . ';';
		}

		$css .= ' }';

		if ( $use_root_padding ) {
			// Top and bottom padding are applied to the outer block container.
			$css .= '.wp-site-blocks { padding-top: var(--wp--style--root--padding-top); padding-bottom: var(--wp--style--root--padding-bottom); }';
			// Right and left padding are applied to the first container with `.has-global-padding` class.
			$css .= '.has-global-padding { padding-right: var(--wp--style--root--padding-right); padding-left: var(--wp--style--root--padding-left); }';
			// Nested containers with `.has-global-padding` class do not get padding.
			$css .= '.has-global-padding :where(.has-global-padding) { padding-right: 0; padding-left: 0; }';
			// Alignfull children of the container with left and right padding have negative margins so they can still be full width.
			$css .= '.has-global-padding > .alignfull { margin-right: calc(var(--wp--style--root--padding-right) * -1); margin-left: calc(var(--wp--style--root--padding-left) * -1); }';
			// The above rule is negated for alignfull children of nested containers.
			$css .= '.has-global-padding :where(.has-global-padding) > .alignfull { margin-right: 0; margin-left: 0; }';
			// Some of the children of alignfull blocks without content width should also get padding: text blocks and non-alignfull container blocks.
			$css .= '.has-global-padding > .alignfull:where(:not(.has-global-padding)) > :where([class*="wp-block-"]:not(.alignfull):not([class*="__"]),p,h1,h2,h3,h4,h5,h6,ul,ol) { padding-right: var(--wp--style--root--padding-right); padding-left: var(--wp--style--root--padding-left); }';
			// The above rule also has to be negated for blocks inside nested `.has-global-padding` blocks.
			$css .= '.has-global-padding :where(.has-global-padding) > .alignfull:where(:not(.has-global-padding)) > :where([class*="wp-block-"]:not(.alignfull):not([class*="__"]),p,h1,h2,h3,h4,h5,h6,ul,ol) { padding-right: 0; padding-left: 0; }';
		}

		$css .= '.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }';
		$css .= '.wp-site-blocks > .alignright { float: right; margin-left: 2em; }';
		$css .= '.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }';

		$block_gap_value       = _wp_array_get( $this->theme_json, array( 'styles', 'spacing', 'blockGap' ), '0.5em' );
		$has_block_gap_support = _wp_array_get( $this->theme_json, array( 'settings', 'spacing', 'blockGap' ) ) !== null;
		if ( $has_block_gap_support ) {
			$block_gap_value = static::get_property_value( $this->theme_json, array( 'styles', 'spacing', 'blockGap' ) );
			$css            .= ":where(.wp-site-blocks) > * { margin-block-start: $block_gap_value; margin-block-end: 0; }";
			$css            .= ':where(.wp-site-blocks) > :first-child:first-child { margin-block-start: 0; }';
			$css            .= ':where(.wp-site-blocks) > :last-child:last-child { margin-block-end: 0; }';

			// For backwards compatibility, ensure the legacy block gap CSS variable is still available.
			$css .= "$selector { --wp--style--block-gap: $block_gap_value; }";
		}
		$css .= $this->get_layout_styles( $block_metadata );

		return $css;
	}

	/**
	 * For metadata values that can either be booleans or paths to booleans, gets the value.
	 *
	 *     $data = array(
	 *       'color' => array(
	 *         'defaultPalette' => true
	 *       )
	 *     );
	 *
	 *     static::get_metadata_boolean( $data, false );
	 *     // => false
	 *
	 *     static::get_metadata_boolean( $data, array( 'color', 'defaultPalette' ) );
	 *     // => true
	 *
	 * @since 6.0.0
	 *
	 * @param array      $data          The data to inspect.
	 * @param bool|array $path          Boolean or path to a boolean.
	 * @param bool       $default_value Default value if the referenced path is missing.
	 *                                  Default false.
	 * @return bool Value of boolean metadata.
	 */
	protected static function get_metadata_boolean( $data, $path, $default_value = false ) {
		if ( is_bool( $path ) ) {
			return $path;
		}

		if ( is_array( $path ) ) {
			$value = _wp_array_get( $data, $path );
			if ( null !== $value ) {
				return $value;
			}
		}

		return $default_value;
	}

	/**
	 * Merges new incoming data.
	 *
	 * @since 5.8.0
	 * @since 5.9.0 Duotone preset also has origins.
	 *
	 * @param WP_Theme_JSON $incoming Data to merge.
	 */
	public function merge( $incoming ) {
		$incoming_data    = $incoming->get_raw_data();
		$this->theme_json = array_replace_recursive( $this->theme_json, $incoming_data );

		/*
		 * The array_replace_recursive algorithm merges at the leaf level,
		 * but we don't want leaf arrays to be merged, so we overwrite it.
		 *
		 * For leaf values that are sequential arrays it will use the numeric indexes for replacement.
		 * We rather replace the existing with the incoming value, if it exists.
		 * This is the case of spacing.units.
		 *
		 * For leaf values that are associative arrays it will merge them as expected.
		 * This is also not the behavior we want for the current associative arrays (presets).
		 * We rather replace the existing with the incoming value, if it exists.
		 * This happens, for example, when we merge data from theme.json upon existing
		 * theme supports or when we merge anything coming from the same source twice.
		 * This is the case of color.palette, color.gradients, color.duotone,
		 * typography.fontSizes, or typography.fontFamilies.
		 *
		 * Additionally, for some preset types, we also want to make sure the
		 * values they introduce don't conflict with default values. We do so
		 * by checking the incoming slugs for theme presets and compare them
		 * with the equivalent default presets: if a slug is present as a default
		 * we remove it from the theme presets.
		 */
		$nodes        = static::get_setting_nodes( $incoming_data );
		$slugs_global = static::get_default_slugs( $this->theme_json, array( 'settings' ) );
		foreach ( $nodes as $node ) {
			// Replace the spacing.units.
			$path   = $node['path'];
			$path[] = 'spacing';
			$path[] = 'units';

			$content = _wp_array_get( $incoming_data, $path, null );
			if ( isset( $content ) ) {
				_wp_array_set( $this->theme_json, $path, $content );
			}

			// Replace the presets.
			foreach ( static::PRESETS_METADATA as $preset ) {
				$override_preset = ! static::get_metadata_boolean( $this->theme_json['settings'], $preset['prevent_override'], true );

				foreach ( static::VALID_ORIGINS as $origin ) {
					$base_path = $node['path'];
					foreach ( $preset['path'] as $leaf ) {
						$base_path[] = $leaf;
					}

					$path   = $base_path;
					$path[] = $origin;

					$content = _wp_array_get( $incoming_data, $path, null );
					if ( ! isset( $content ) ) {
						continue;
					}

					if ( 'theme' === $origin && $preset['use_default_names'] ) {
						foreach ( $content as $key => $item ) {
							if ( ! isset( $item['name'] ) ) {
								$name = static::get_name_from_defaults( $item['slug'], $base_path );
								if ( null !== $name ) {
									$content[ $key ]['name'] = $name;
								}
							}
						}
					}

					if (
						( 'theme' !== $origin ) ||
						( 'theme' === $origin && $override_preset )
					) {
						_wp_array_set( $this->theme_json, $path, $content );
					} else {
						$slugs_node = static::get_default_slugs( $this->theme_json, $node['path'] );
						$slugs      = array_merge_recursive( $slugs_global, $slugs_node );

						$slugs_for_preset = _wp_array_get( $slugs, $preset['path'], array() );
						$content          = static::filter_slugs( $content, $slugs_for_preset );
						_wp_array_set( $this->theme_json, $path, $content );
					}
				}
			}
		}
	}

	/**
	 * Converts all filter (duotone) presets into SVGs.
	 *
	 * @since 5.9.1
	 *
	 * @param array $origins List of origins to process.
	 * @return string SVG filters.
	 */
	public function get_svg_filters( $origins ) {
		$blocks_metadata = static::get_blocks_metadata();
		$setting_nodes   = static::get_setting_nodes( $this->theme_json, $blocks_metadata );

		$filters = '';
		foreach ( $setting_nodes as $metadata ) {
			$node = _wp_array_get( $this->theme_json, $metadata['path'], array() );
			if ( empty( $node['color']['duotone'] ) ) {
				continue;
			}

			$duotone_presets = $node['color']['duotone'];

			foreach ( $origins as $origin ) {
				if ( ! isset( $duotone_presets[ $origin ] ) ) {
					continue;
				}
				foreach ( $duotone_presets[ $origin ] as $duotone_preset ) {
					$filters .= wp_get_duotone_filter_svg( $duotone_preset );
				}
			}
		}

		return $filters;
	}

	/**
	 * Determines whether a presets should be overridden or not.
	 *
	 * @since 5.9.0
	 * @deprecated 6.0.0 Use {@see 'get_metadata_boolean'} instead.
	 *
	 * @param array      $theme_json The theme.json like structure to inspect.
	 * @param array      $path       Path to inspect.
	 * @param bool|array $override   Data to compute whether to override the preset.
	 * @return boolean
	 */
	protected static function should_override_preset( $theme_json, $path, $override ) {
		_deprecated_function( __METHOD__, '6.0.0', 'get_metadata_boolean' );

		if ( is_bool( $override ) ) {
			return $override;
		}

		/*
		 * The relationship between whether to override the defaults
		 * and whether the defaults are enabled is inverse:
		 *
		 * - If defaults are enabled  => theme presets should not be overridden
		 * - If defaults are disabled => theme presets should be overridden
		 *
		 * For example, a theme sets defaultPalette to false,
		 * making the default palette hidden from the user.
		 * In that case, we want all the theme presets to be present,
		 * so they should override the defaults.
		 */
		if ( is_array( $override ) ) {
			$value = _wp_array_get( $theme_json, array_merge( $path, $override ) );
			if ( isset( $value ) ) {
				return ! $value;
			}

			// Search the top-level key if none was found for this node.
			$value = _wp_array_get( $theme_json, array_merge( array( 'settings' ), $override ) );
			if ( isset( $value ) ) {
				return ! $value;
			}

			return true;
		}
	}

	/**
	 * Returns the default slugs for all the presets in an associative array
	 * whose keys are the preset paths and the leafs is the list of slugs.
	 *
	 * For example:
	 *
	 *     array(
	 *       'color' => array(
	 *         'palette'   => array( 'slug-1', 'slug-2' ),
	 *         'gradients' => array( 'slug-3', 'slug-4' ),
	 *       ),
	 *     )
	 *
	 * @since 5.9.0
	 *
	 * @param array $data      A theme.json like structure.
	 * @param array $node_path The path to inspect. It's 'settings' by default.
	 * @return array
	 */
	protected static function get_default_slugs( $data, $node_path ) {
		$slugs = array();

		foreach ( static::PRESETS_METADATA as $metadata ) {
			$path = $node_path;
			foreach ( $metadata['path'] as $leaf ) {
				$path[] = $leaf;
			}
			$path[] = 'default';

			$preset = _wp_array_get( $data, $path, null );
			if ( ! isset( $preset ) ) {
				continue;
			}

			$slugs_for_preset = array();
			foreach ( $preset as $item ) {
				if ( isset( $item['slug'] ) ) {
					$slugs_for_preset[] = $item['slug'];
				}
			}

			_wp_array_set( $slugs, $metadata['path'], $slugs_for_preset );
		}

		return $slugs;
	}

	/**
	 * Gets a `default`'s preset name by a provided slug.
	 *
	 * @since 5.9.0
	 *
	 * @param string $slug The slug we want to find a match from default presets.
	 * @param array  $base_path The path to inspect. It's 'settings' by default.
	 * @return string|null
	 */
	protected function get_name_from_defaults( $slug, $base_path ) {
		$path            = $base_path;
		$path[]          = 'default';
		$default_content = _wp_array_get( $this->theme_json, $path, null );
		if ( ! $default_content ) {
			return null;
		}
		foreach ( $default_content as $item ) {
			if ( $slug === $item['slug'] ) {
				return $item['name'];
			}
		}
		return null;
	}

	/**
	 * Removes the preset values whose slug is equal to any of given slugs.
	 *
	 * @since 5.9.0
	 *
	 * @param array $node  The node with the presets to validate.
	 * @param array $slugs The slugs that should not be overridden.
	 * @return array The new node.
	 */
	protected static function filter_slugs( $node, $slugs ) {
		if ( empty( $slugs ) ) {
			return $node;
		}

		$new_node = array();
		foreach ( $node as $value ) {
			if ( isset( $value['slug'] ) && ! in_array( $value['slug'], $slugs, true ) ) {
				$new_node[] = $value;
			}
		}

		return $new_node;
	}

	/**
	 * Removes insecure data from theme.json.
	 *
	 * @since 5.9.0
	 * @since 6.3.2 Preserves global styles block variations when securing styles.
	 *
	 * @param array $theme_json Structure to sanitize.
	 * @return array Sanitized structure.
	 */
	public static function remove_insecure_properties( $theme_json ) {
		$sanitized = array();

		$theme_json = WP_Theme_JSON_Schema::migrate( $theme_json );

		$valid_block_names   = array_keys( static::get_blocks_metadata() );
		$valid_element_names = array_keys( static::ELEMENTS );
		$valid_variations    = array();
		foreach ( self::get_blocks_metadata() as $block_name => $block_meta ) {
			if ( ! isset( $block_meta['styleVariations'] ) ) {
				continue;
			}
			$valid_variations[ $block_name ] = array_keys( $block_meta['styleVariations'] );
		}

		$theme_json = static::sanitize( $theme_json, $valid_block_names, $valid_element_names, $valid_variations );

		$blocks_metadata = static::get_blocks_metadata();
		$style_nodes     = static::get_style_nodes( $theme_json, $blocks_metadata );

		foreach ( $style_nodes as $metadata ) {
			$input = _wp_array_get( $theme_json, $metadata['path'], array() );
			if ( empty( $input ) ) {
				continue;
			}

			// The global styles custom CSS is not sanitized, but can only be edited by users with 'edit_css' capability.
			if ( isset( $input['css'] ) && current_user_can( 'edit_css' ) ) {
				$output = $input;
			} else {
				$output = static::remove_insecure_styles( $input );
			}

			/*
			 * Get a reference to element name from path.
			 * $metadata['path'] = array( 'styles', 'elements', 'link' );
			 */
			$current_element = $metadata['path'][ count( $metadata['path'] ) - 1 ];

			/*
			 * $output is stripped of pseudo selectors. Re-add and process them
			 * or insecure styles here.
			 *
			 * TODO: Replace array_key_exists() with isset() check once WordPress drops
			 * support for PHP 5.6. See https://core.trac.wordpress.org/ticket/57067.
			 */
			if ( array_key_exists( $current_element, static::VALID_ELEMENT_PSEUDO_SELECTORS ) ) {
				foreach ( static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] as $pseudo_selector ) {
					if ( isset( $input[ $pseudo_selector ] ) ) {
						$output[ $pseudo_selector ] = static::remove_insecure_styles( $input[ $pseudo_selector ] );
					}
				}
			}

			if ( ! empty( $output ) ) {
				_wp_array_set( $sanitized, $metadata['path'], $output );
			}

			if ( isset( $metadata['variations'] ) ) {
				foreach ( $metadata['variations'] as $variation ) {
					$variation_input = _wp_array_get( $theme_json, $variation['path'], array() );
					if ( empty( $variation_input ) ) {
						continue;
					}

					$variation_output = static::remove_insecure_styles( $variation_input );
					if ( ! empty( $variation_output ) ) {
						_wp_array_set( $sanitized, $variation['path'], $variation_output );
					}
				}
			}
		}

		$setting_nodes = static::get_setting_nodes( $theme_json );
		foreach ( $setting_nodes as $metadata ) {
			$input = _wp_array_get( $theme_json, $metadata['path'], array() );
			if ( empty( $input ) ) {
				continue;
			}

			$output = static::remove_insecure_settings( $input );
			if ( ! empty( $output ) ) {
				_wp_array_set( $sanitized, $metadata['path'], $output );
			}
		}

		if ( empty( $sanitized['styles'] ) ) {
			unset( $theme_json['styles'] );
		} else {
			$theme_json['styles'] = $sanitized['styles'];
		}

		if ( empty( $sanitized['settings'] ) ) {
			unset( $theme_json['settings'] );
		} else {
			$theme_json['settings'] = $sanitized['settings'];
		}

		return $theme_json;
	}

	/**
	 * Processes a setting node and returns the same node
	 * without the insecure settings.
	 *
	 * @since 5.9.0
	 *
	 * @param array $input Node to process.
	 * @return array
	 */
	protected static function remove_insecure_settings( $input ) {
		$output = array();
		foreach ( static::PRESETS_METADATA as $preset_metadata ) {
			foreach ( static::VALID_ORIGINS as $origin ) {
				$path_with_origin   = $preset_metadata['path'];
				$path_with_origin[] = $origin;
				$presets            = _wp_array_get( $input, $path_with_origin, null );
				if ( null === $presets ) {
					continue;
				}

				$escaped_preset = array();
				foreach ( $presets as $preset ) {
					if (
						esc_attr( esc_html( $preset['name'] ) ) === $preset['name'] &&
						sanitize_html_class( $preset['slug'] ) === $preset['slug']
					) {
						$value = null;
						if ( isset( $preset_metadata['value_key'], $preset[ $preset_metadata['value_key'] ] ) ) {
							$value = $preset[ $preset_metadata['value_key'] ];
						} elseif (
							isset( $preset_metadata['value_func'] ) &&
							is_callable( $preset_metadata['value_func'] )
						) {
							$value = call_user_func( $preset_metadata['value_func'], $preset );
						}

						$preset_is_valid = true;
						foreach ( $preset_metadata['properties'] as $property ) {
							if ( ! static::is_safe_css_declaration( $property, $value ) ) {
								$preset_is_valid = false;
								break;
							}
						}

						if ( $preset_is_valid ) {
							$escaped_preset[] = $preset;
						}
					}
				}

				if ( ! empty( $escaped_preset ) ) {
					_wp_array_set( $output, $path_with_origin, $escaped_preset );
				}
			}
		}

		// Ensure indirect properties not included in any `PRESETS_METADATA` value are allowed.
		static::remove_indirect_properties( $input, $output );

		return $output;
	}

	/**
	 * Processes a style node and returns the same node
	 * without the insecure styles.
	 *
	 * @since 5.9.0
	 *
	 * @param array $input Node to process.
	 * @return array
	 */
	protected static function remove_insecure_styles( $input ) {
		$output       = array();
		$declarations = static::compute_style_properties( $input );

		foreach ( $declarations as $declaration ) {
			if ( static::is_safe_css_declaration( $declaration['name'], $declaration['value'] ) ) {
				$path = static::PROPERTIES_METADATA[ $declaration['name'] ];

				/*
				 * Check the value isn't an array before adding so as to not
				 * double up shorthand and longhand styles.
				 */
				$value = _wp_array_get( $input, $path, array() );
				if ( ! is_array( $value ) ) {
					_wp_array_set( $output, $path, $value );
				}
			}
		}

		// Ensure indirect properties not handled by `compute_style_properties` are allowed.
		static::remove_indirect_properties( $input, $output );

		return $output;
	}

	/**
	 * Checks that a declaration provided by the user is safe.
	 *
	 * @since 5.9.0
	 *
	 * @param string $property_name  Property name in a CSS declaration, i.e. the `color` in `color: red`.
	 * @param string $property_value Value in a CSS declaration, i.e. the `red` in `color: red`.
	 * @return bool
	 */
	protected static function is_safe_css_declaration( $property_name, $property_value ) {
		$style_to_validate = $property_name . ': ' . $property_value;
		$filtered          = esc_html( safecss_filter_attr( $style_to_validate ) );
		return ! empty( trim( $filtered ) );
	}

	/**
	 * Removes indirect properties from the given input node and
	 * sets in the given output node.
	 *
	 * @since 6.2.0
	 *
	 * @param array $input  Node to process.
	 * @param array $output The processed node. Passed by reference.
	 */
	private static function remove_indirect_properties( $input, &$output ) {
		foreach ( static::INDIRECT_PROPERTIES_METADATA as $property => $paths ) {
			foreach ( $paths as $path ) {
				$value = _wp_array_get( $input, $path );
				if (
					is_string( $value ) &&
					static::is_safe_css_declaration( $property, $value )
				) {
					_wp_array_set( $output, $path, $value );
				}
			}
		}
	}

	/**
	 * Returns the raw data.
	 *
	 * @since 5.8.0
	 *
	 * @return array Raw data.
	 */
	public function get_raw_data() {
		return $this->theme_json;
	}

	/**
	 * Transforms the given editor settings according the
	 * add_theme_support format to the theme.json format.
	 *
	 * @since 5.8.0
	 *
	 * @param array $settings Existing editor settings.
	 * @return array Config that adheres to the theme.json schema.
	 */
	public static function get_from_editor_settings( $settings ) {
		$theme_settings = array(
			'version'  => static::LATEST_SCHEMA,
			'settings' => array(),
		);

		// Deprecated theme supports.
		if ( isset( $settings['disableCustomColors'] ) ) {
			if ( ! isset( $theme_settings['settings']['color'] ) ) {
				$theme_settings['settings']['color'] = array();
			}
			$theme_settings['settings']['color']['custom'] = ! $settings['disableCustomColors'];
		}

		if ( isset( $settings['disableCustomGradients'] ) ) {
			if ( ! isset( $theme_settings['settings']['color'] ) ) {
				$theme_settings['settings']['color'] = array();
			}
			$theme_settings['settings']['color']['customGradient'] = ! $settings['disableCustomGradients'];
		}

		if ( isset( $settings['disableCustomFontSizes'] ) ) {
			if ( ! isset( $theme_settings['settings']['typography'] ) ) {
				$theme_settings['settings']['typography'] = array();
			}
			$theme_settings['settings']['typography']['customFontSize'] = ! $settings['disableCustomFontSizes'];
		}

		if ( isset( $settings['enableCustomLineHeight'] ) ) {
			if ( ! isset( $theme_settings['settings']['typography'] ) ) {
				$theme_settings['settings']['typography'] = array();
			}
			$theme_settings['settings']['typography']['lineHeight'] = $settings['enableCustomLineHeight'];
		}

		if ( isset( $settings['enableCustomUnits'] ) ) {
			if ( ! isset( $theme_settings['settings']['spacing'] ) ) {
				$theme_settings['settings']['spacing'] = array();
			}
			$theme_settings['settings']['spacing']['units'] = ( true === $settings['enableCustomUnits'] ) ?
				array( 'px', 'em', 'rem', 'vh', 'vw', '%' ) :
				$settings['enableCustomUnits'];
		}

		if ( isset( $settings['colors'] ) ) {
			if ( ! isset( $theme_settings['settings']['color'] ) ) {
				$theme_settings['settings']['color'] = array();
			}
			$theme_settings['settings']['color']['palette'] = $settings['colors'];
		}

		if ( isset( $settings['gradients'] ) ) {
			if ( ! isset( $theme_settings['settings']['color'] ) ) {
				$theme_settings['settings']['color'] = array();
			}
			$theme_settings['settings']['color']['gradients'] = $settings['gradients'];
		}

		if ( isset( $settings['fontSizes'] ) ) {
			$font_sizes = $settings['fontSizes'];
			// Back-compatibility for presets without units.
			foreach ( $font_sizes as $key => $font_size ) {
				if ( is_numeric( $font_size['size'] ) ) {
					$font_sizes[ $key ]['size'] = $font_size['size'] . 'px';
				}
			}
			if ( ! isset( $theme_settings['settings']['typography'] ) ) {
				$theme_settings['settings']['typography'] = array();
			}
			$theme_settings['settings']['typography']['fontSizes'] = $font_sizes;
		}

		if ( isset( $settings['enableCustomSpacing'] ) ) {
			if ( ! isset( $theme_settings['settings']['spacing'] ) ) {
				$theme_settings['settings']['spacing'] = array();
			}
			$theme_settings['settings']['spacing']['padding'] = $settings['enableCustomSpacing'];
		}

		return $theme_settings;
	}

	/**
	 * Returns the current theme's wanted patterns(slugs) to be
	 * registered from Pattern Directory.
	 *
	 * @since 6.0.0
	 *
	 * @return string[]
	 */
	public function get_patterns() {
		if ( isset( $this->theme_json['patterns'] ) && is_array( $this->theme_json['patterns'] ) ) {
			return $this->theme_json['patterns'];
		}
		return array();
	}

	/**
	 * Returns a valid theme.json as provided by a theme.
	 *
	 * Unlike get_raw_data() this returns the presets flattened, as provided by a theme.
	 * This also uses appearanceTools instead of their opt-ins if all of them are true.
	 *
	 * @since 6.0.0
	 *
	 * @return array
	 */
	public function get_data() {
		$output = $this->theme_json;
		$nodes  = static::get_setting_nodes( $output );

		/**
		 * Flatten the theme & custom origins into a single one.
		 *
		 * For example, the following:
		 *
		 * {
		 *   "settings": {
		 *     "color": {
		 *       "palette": {
		 *         "theme": [ {} ],
		 *         "custom": [ {} ]
		 *       }
		 *     }
		 *   }
		 * }
		 *
		 * will be converted to:
		 *
		 * {
		 *   "settings": {
		 *     "color": {
		 *       "palette": [ {} ]
		 *     }
		 *   }
		 * }
		 */
		foreach ( $nodes as $node ) {
			foreach ( static::PRESETS_METADATA as $preset_metadata ) {
				$path = $node['path'];
				foreach ( $preset_metadata['path'] as $preset_metadata_path ) {
					$path[] = $preset_metadata_path;
				}
				$preset = _wp_array_get( $output, $path, null );
				if ( null === $preset ) {
					continue;
				}

				$items = array();
				if ( isset( $preset['theme'] ) ) {
					foreach ( $preset['theme'] as $item ) {
						$slug = $item['slug'];
						unset( $item['slug'] );
						$items[ $slug ] = $item;
					}
				}
				if ( isset( $preset['custom'] ) ) {
					foreach ( $preset['custom'] as $item ) {
						$slug = $item['slug'];
						unset( $item['slug'] );
						$items[ $slug ] = $item;
					}
				}
				$flattened_preset = array();
				foreach ( $items as $slug => $value ) {
					$flattened_preset[] = array_merge( array( 'slug' => (string) $slug ), $value );
				}
				_wp_array_set( $output, $path, $flattened_preset );
			}
		}

		/*
		 * If all of the static::APPEARANCE_TOOLS_OPT_INS are true,
		 * this code unsets them and sets 'appearanceTools' instead.
		 */
		foreach ( $nodes as $node ) {
			$all_opt_ins_are_set = true;
			foreach ( static::APPEARANCE_TOOLS_OPT_INS as $opt_in_path ) {
				$full_path = $node['path'];
				foreach ( $opt_in_path as $opt_in_path_item ) {
					$full_path[] = $opt_in_path_item;
				}
				/*
				 * Use "unset prop" as a marker instead of "null" because
				 * "null" can be a valid value for some props (e.g. blockGap).
				 */
				$opt_in_value = _wp_array_get( $output, $full_path, 'unset prop' );
				if ( 'unset prop' === $opt_in_value ) {
					$all_opt_ins_are_set = false;
					break;
				}
			}

			if ( $all_opt_ins_are_set ) {
				$node_path_with_appearance_tools   = $node['path'];
				$node_path_with_appearance_tools[] = 'appearanceTools';
				_wp_array_set( $output, $node_path_with_appearance_tools, true );
				foreach ( static::APPEARANCE_TOOLS_OPT_INS as $opt_in_path ) {
					$full_path = $node['path'];
					foreach ( $opt_in_path as $opt_in_path_item ) {
						$full_path[] = $opt_in_path_item;
					}
					/*
					 * Use "unset prop" as a marker instead of "null" because
					 * "null" can be a valid value for some props (e.g. blockGap).
					 */
					$opt_in_value = _wp_array_get( $output, $full_path, 'unset prop' );
					if ( true !== $opt_in_value ) {
						continue;
					}

					/*
					 * The following could be improved to be path independent.
					 * At the moment it relies on a couple of assumptions:
					 *
					 * - all opt-ins having a path of size 2.
					 * - there's two sources of settings: the top-level and the block-level.
					 */
					if (
						( 1 === count( $node['path'] ) ) &&
						( 'settings' === $node['path'][0] )
					) {
						// Top-level settings.
						unset( $output['settings'][ $opt_in_path[0] ][ $opt_in_path[1] ] );
						if ( empty( $output['settings'][ $opt_in_path[0] ] ) ) {
							unset( $output['settings'][ $opt_in_path[0] ] );
						}
					} elseif (
						( 3 === count( $node['path'] ) ) &&
						( 'settings' === $node['path'][0] ) &&
						( 'blocks' === $node['path'][1] )
					) {
						// Block-level settings.
						$block_name = $node['path'][2];
						unset( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ][ $opt_in_path[1] ] );
						if ( empty( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ] ) ) {
							unset( $output['settings']['blocks'][ $block_name ][ $opt_in_path[0] ] );
						}
					}
				}
			}
		}

		wp_recursive_ksort( $output );

		return $output;
	}

	/**
	 * Sets the spacingSizes array based on the spacingScale values from theme.json.
	 *
	 * @since 6.1.0
	 *
	 * @return null|void
	 */
	public function set_spacing_sizes() {
		$spacing_scale = _wp_array_get( $this->theme_json, array( 'settings', 'spacing', 'spacingScale' ), array() );

		if ( ! isset( $spacing_scale['steps'] )
			|| ! is_numeric( $spacing_scale['steps'] )
			|| ! isset( $spacing_scale['mediumStep'] )
			|| ! isset( $spacing_scale['unit'] )
			|| ! isset( $spacing_scale['operator'] )
			|| ! isset( $spacing_scale['increment'] )
			|| ! isset( $spacing_scale['steps'] )
			|| ! is_numeric( $spacing_scale['increment'] )
			|| ! is_numeric( $spacing_scale['mediumStep'] )
			|| ( '+' !== $spacing_scale['operator'] && '*' !== $spacing_scale['operator'] ) ) {
			if ( ! empty( $spacing_scale ) ) {
				trigger_error( __( 'Some of the theme.json settings.spacing.spacingScale values are invalid' ), E_USER_NOTICE );
			}
			return null;
		}

		// If theme authors want to prevent the generation of the core spacing scale they can set their theme.json spacingScale.steps to 0.
		if ( 0 === $spacing_scale['steps'] ) {
			return null;
		}

		$unit            = '%' === $spacing_scale['unit'] ? '%' : sanitize_title( $spacing_scale['unit'] );
		$current_step    = $spacing_scale['mediumStep'];
		$steps_mid_point = round( $spacing_scale['steps'] / 2, 0 );
		$x_small_count   = null;
		$below_sizes     = array();
		$slug            = 40;
		$remainder       = 0;

		for ( $below_midpoint_count = $steps_mid_point - 1; $spacing_scale['steps'] > 1 && $slug > 0 && $below_midpoint_count > 0; $below_midpoint_count-- ) {
			if ( '+' === $spacing_scale['operator'] ) {
				$current_step -= $spacing_scale['increment'];
			} elseif ( $spacing_scale['increment'] > 1 ) {
				$current_step /= $spacing_scale['increment'];
			} else {
				$current_step *= $spacing_scale['increment'];
			}

			if ( $current_step <= 0 ) {
				$remainder = $below_midpoint_count;
				break;
			}

			$below_sizes[] = array(
				/* translators: %s: Digit to indicate multiple of sizing, eg. 2X-Small. */
				'name' => $below_midpoint_count === $steps_mid_point - 1 ? __( 'Small' ) : sprintf( __( '%sX-Small' ), (string) $x_small_count ),
				'slug' => (string) $slug,
				'size' => round( $current_step, 2 ) . $unit,
			);

			if ( $below_midpoint_count === $steps_mid_point - 2 ) {
				$x_small_count = 2;
			}

			if ( $below_midpoint_count < $steps_mid_point - 2 ) {
				$x_small_count++;
			}

			$slug -= 10;
		}

		$below_sizes = array_reverse( $below_sizes );

		$below_sizes[] = array(
			'name' => __( 'Medium' ),
			'slug' => '50',
			'size' => $spacing_scale['mediumStep'] . $unit,
		);

		$current_step  = $spacing_scale['mediumStep'];
		$x_large_count = null;
		$above_sizes   = array();
		$slug          = 60;
		$steps_above   = ( $spacing_scale['steps'] - $steps_mid_point ) + $remainder;

		for ( $above_midpoint_count = 0; $above_midpoint_count < $steps_above; $above_midpoint_count++ ) {
			$current_step = '+' === $spacing_scale['operator']
				? $current_step + $spacing_scale['increment']
				: ( $spacing_scale['increment'] >= 1 ? $current_step * $spacing_scale['increment'] : $current_step / $spacing_scale['increment'] );

			$above_sizes[] = array(
				/* translators: %s: Digit to indicate multiple of sizing, eg. 2X-Large. */
				'name' => 0 === $above_midpoint_count ? __( 'Large' ) : sprintf( __( '%sX-Large' ), (string) $x_large_count ),
				'slug' => (string) $slug,
				'size' => round( $current_step, 2 ) . $unit,
			);

			if ( 1 === $above_midpoint_count ) {
				$x_large_count = 2;
			}

			if ( $above_midpoint_count > 1 ) {
				$x_large_count++;
			}

			$slug += 10;
		}

		$spacing_sizes = $below_sizes;
		foreach ( $above_sizes as $above_sizes_item ) {
			$spacing_sizes[] = $above_sizes_item;
		}

		// If there are 7 or fewer steps in the scale revert to numbers for labels instead of t-shirt sizes.
		if ( $spacing_scale['steps'] <= 7 ) {
			for ( $spacing_sizes_count = 0; $spacing_sizes_count < count( $spacing_sizes ); $spacing_sizes_count++ ) {
				$spacing_sizes[ $spacing_sizes_count ]['name'] = (string) ( $spacing_sizes_count + 1 );
			}
		}

		_wp_array_set( $this->theme_json, array( 'settings', 'spacing', 'spacingSizes', 'default' ), $spacing_sizes );
	}

	/**
	 * This is used to convert the internal representation of variables to the CSS representation.
	 * For example, `var:preset|color|vivid-green-cyan` becomes `var(--wp--preset--color--vivid-green-cyan)`.
	 *
	 * @since 6.3.0
	 * @param string $value The variable such as var:preset|color|vivid-green-cyan to convert.
	 * @return string The converted variable.
	 */
	private static function convert_custom_properties( $value ) {
		$prefix     = 'var:';
		$prefix_len = strlen( $prefix );
		$token_in   = '|';
		$token_out  = '--';
		if ( str_starts_with( $value, $prefix ) ) {
			$unwrapped_name = str_replace(
				$token_in,
				$token_out,
				substr( $value, $prefix_len )
			);
			$value          = "var(--wp--$unwrapped_name)";
		}

		return $value;
	}

	/**
	 * Given a tree, converts the internal representation of variables to the CSS representation.
	 * It is recursive and modifies the input in-place.
	 *
	 * @since 6.3.0
	 * @param array $tree   Input to process.
	 * @return array The modified $tree.
	 */
	private static function resolve_custom_css_format( $tree ) {
		$prefix = 'var:';

		foreach ( $tree as $key => $data ) {
			if ( is_string( $data ) && str_starts_with( $data, $prefix ) ) {
				$tree[ $key ] = self::convert_custom_properties( $data );
			} elseif ( is_array( $data ) ) {
				$tree[ $key ] = self::resolve_custom_css_format( $data );
			}
		}

		return $tree;
	}

	/**
	 * Returns the selectors metadata for a block.
	 *
	 * @since 6.3.0
	 *
	 * @param object $block_type    The block type.
	 * @param string $root_selector The block's root selector.
	 *
	 * @return array The custom selectors set by the block.
	 */
	protected static function get_block_selectors( $block_type, $root_selector ) {
		if ( ! empty( $block_type->selectors ) ) {
			return $block_type->selectors;
		}

		$selectors = array( 'root' => $root_selector );
		foreach ( static::BLOCK_SUPPORT_FEATURE_LEVEL_SELECTORS as $key => $feature ) {
			$feature_selector = wp_get_block_css_selector( $block_type, $key );
			if ( null !== $feature_selector ) {
				$selectors[ $feature ] = array( 'root' => $feature_selector );
			}
		}

		return $selectors;
	}

	/**
	 * Generates all the element selectors for a block.
	 *
	 * @since 6.3.0
	 *
	 * @param string $root_selector The block's root CSS selector.
	 * @return array The block's element selectors.
	 */
	protected static function get_block_element_selectors( $root_selector ) {
		/*
		 * Assign defaults, then override those that the block sets by itself.
		 * If the block selector is compounded, will append the element to each
		 * individual block selector.
		 */
		$block_selectors   = explode( ',', $root_selector );
		$element_selectors = array();
		foreach ( static::ELEMENTS as $el_name => $el_selector ) {
			$element_selector = array();
			foreach ( $block_selectors as $selector ) {
				if ( $selector === $el_selector ) {
					$element_selector = array( $el_selector );
					break;
				}
				$element_selector[] = static::prepend_to_selector( $el_selector, $selector . ' ' );
			}
			$element_selectors[ $el_name ] = implode( ',', $element_selector );
		}

		return $element_selectors;
	}

	/**
	 * Generates style declarations for a node's features e.g., color, border,
	 * typography etc. that have custom selectors in their related block's
	 * metadata.
	 *
	 * @since 6.3.0
	 *
	 * @param object $metadata The related block metadata containing selectors.
	 * @param object $node     A merged theme.json node for block or variation.
	 *
	 * @return array The style declarations for the node's features with custom
	 * selectors.
	 */
	protected function get_feature_declarations_for_node( $metadata, &$node ) {
		$declarations = array();

		if ( ! isset( $metadata['selectors'] ) ) {
			return $declarations;
		}

		$settings = _wp_array_get( $this->theme_json, array( 'settings' ) );

		foreach ( $metadata['selectors'] as $feature => $feature_selectors ) {
			/*
			 * Skip if this is the block's root selector or the block doesn't
			 * have any styles for the feature.
			 */
			if ( 'root' === $feature || empty( $node[ $feature ] ) ) {
				continue;
			}

			if ( is_array( $feature_selectors ) ) {
				foreach ( $feature_selectors as $subfeature => $subfeature_selector ) {
					if ( 'root' === $subfeature || empty( $node[ $feature ][ $subfeature ] ) ) {
						continue;
					}

					/*
					 * Create temporary node containing only the subfeature data
					 * to leverage existing `compute_style_properties` function.
					 */
					$subfeature_node = array(
						$feature => array(
							$subfeature => $node[ $feature ][ $subfeature ],
						),
					);

					// Generate style declarations.
					$new_declarations = static::compute_style_properties( $subfeature_node, $settings, null, $this->theme_json );

					// Merge subfeature declarations into feature declarations.
					if ( isset( $declarations[ $subfeature_selector ] ) ) {
						foreach ( $new_declarations as $new_declaration ) {
							$declarations[ $subfeature_selector ][] = $new_declaration;
						}
					} else {
						$declarations[ $subfeature_selector ] = $new_declarations;
					}

					/*
					 * Remove the subfeature from the block's node now its
					 * styles will be included under its own selector not the
					 * block's.
					 */
					unset( $node[ $feature ][ $subfeature ] );
				}
			}

			/*
			 * Now subfeatures have been processed and removed we can process
			 * feature root selector or simple string selector.
			 */
			if (
				is_string( $feature_selectors ) ||
				( isset( $feature_selectors['root'] ) && $feature_selectors['root'] )
			) {
				$feature_selector = is_string( $feature_selectors ) ? $feature_selectors : $feature_selectors['root'];

				/*
				 * Create temporary node containing only the feature data
				 * to leverage existing `compute_style_properties` function.
				 */
				$feature_node = array( $feature => $node[ $feature ] );

				// Generate the style declarations.
				$new_declarations = static::compute_style_properties( $feature_node, $settings, null, $this->theme_json );

				/*
				 * Merge new declarations with any that already exist for
				 * the feature selector. This may occur when multiple block
				 * support features use the same custom selector.
				 */
				if ( isset( $declarations[ $feature_selector ] ) ) {
					foreach ( $new_declarations as $new_declaration ) {
						$declarations[ $feature_selector ][] = $new_declaration;
					}
				} else {
					$declarations[ $feature_selector ] = $new_declarations;
				}

				/*
				 * Remove the feature from the block's node now its styles
				 * will be included under its own selector not the block's.
				 */
				unset( $node[ $feature ] );
			}
		}

		return $declarations;
	}

	/**
	 * Replaces CSS variables with their values in place.
	 *
	 * @since 6.3.0
	 * @param array $styles CSS declarations to convert.
	 * @param array $values key => value pairs to use for replacement.
	 * @return array
	 */
	private static function convert_variables_to_value( $styles, $values ) {
		foreach ( $styles as $key => $style ) {
			if ( is_array( $style ) ) {
				$styles[ $key ] = self::convert_variables_to_value( $style, $values );
				continue;
			}

			if ( 0 <= strpos( $style, 'var(' ) ) {
				// find all the variables in the string in the form of var(--variable-name, fallback), with fallback in the second capture group.

				$has_matches = preg_match_all( '/var\(([^),]+)?,?\s?(\S+)?\)/', $style, $var_parts );

				if ( $has_matches ) {
					$resolved_style = $styles[ $key ];
					foreach ( $var_parts[1] as $index => $var_part ) {
						$key_in_values   = 'var(' . $var_part . ')';
						$rule_to_replace = $var_parts[0][ $index ]; // the css rule to replace e.g. var(--wp--preset--color--vivid-green-cyan).
						$fallback        = $var_parts[2][ $index ]; // the fallback value.
						$resolved_style  = str_replace(
							array(
								$rule_to_replace,
								$fallback,
							),
							array(
								isset( $values[ $key_in_values ] ) ? $values[ $key_in_values ] : $rule_to_replace,
								isset( $values[ $fallback ] ) ? $values[ $fallback ] : $fallback,
							),
							$resolved_style
						);
					}
					$styles[ $key ] = $resolved_style;
				}
			}
		}

		return $styles;
	}

	/**
	 * Resolves the values of CSS variables in the given styles.
	 *
	 * @since 6.3.0
	 * @param WP_Theme_JSON $theme_json The theme json resolver.
	 *
	 * @return WP_Theme_JSON The $theme_json with resolved variables.
	 */
	public static function resolve_variables( $theme_json ) {
		$settings    = $theme_json->get_settings();
		$styles      = $theme_json->get_raw_data()['styles'];
		$preset_vars = static::compute_preset_vars( $settings, static::VALID_ORIGINS );
		$theme_vars  = static::compute_theme_vars( $settings );
		$vars        = array_reduce(
			array_merge( $preset_vars, $theme_vars ),
			function( $carry, $item ) {
				$name                    = $item['name'];
				$carry[ "var({$name})" ] = $item['value'];
				return $carry;
			},
			array()
		);

		$theme_json->theme_json['styles'] = self::convert_variables_to_value( $styles, $vars );
		return $theme_json;
	}
}
__( 'Invalid featured media ID.' ),
					array( 'status' => 400 )
				);
			}
		} else {
			return delete_post_thumbnail( $post_id );
		}

	}

	/**
	 * Checks whether the template is valid for the given post.
	 *
	 * @since 4.9.0
	 *
	 * @param string          $template Page template filename.
	 * @param WP_REST_Request $request  Request.
	 * @return bool|WP_Error True if template is still valid or if the same as existing value, or false if template not supported.
	 */
	public function check_template( $template, $request ) {

		if ( ! $template ) {
			return true;
		}

		if ( $request['id'] ) {
			$post             = get_post( $request['id'] );
			$current_template = get_page_template_slug( $request['id'] );
		} else {
			$post             = null;
			$current_template = '';
		}

		// Always allow for updating a post to the same template, even if that template is no longer supported.
		if ( $template === $current_template ) {
			return true;
		}

		// If this is a create request, get_post() will return null and wp theme will fallback to the passed post type.
		$allowed_templates = wp_get_theme()->get_page_templates( $post, $this->post_type );

		if ( isset( $allowed_templates[ $template ] ) ) {
			return true;
		}

		return new WP_Error(
			'rest_invalid_param',
			/* translators: 1: Parameter, 2: List of valid values. */
			sprintf( __( '%1$s is not one of %2$s.' ), 'template', implode( ', ', array_keys( $allowed_templates ) ) )
		);
	}

	/**
	 * Sets the template for a post.
	 *
	 * @since 4.7.0
	 * @since 4.9.0 Added the `$validate` parameter.
	 *
	 * @param string $template Page template filename.
	 * @param int    $post_id  Post ID.
	 * @param bool   $validate Whether to validate that the template selected is valid.
	 */
	public function handle_template( $template, $post_id, $validate = false ) {

		if ( $validate && ! array_key_exists( $template, wp_get_theme()->get_page_templates( get_post( $post_id ) ) ) ) {
			$template = '';
		}

		update_post_meta( $post_id, '_wp_page_template', $template );
	}

	/**
	 * Updates the post's terms from a REST request.
	 *
	 * @since 4.7.0
	 *
	 * @param int             $post_id The post ID to update the terms form.
	 * @param WP_REST_Request $request The request object with post and terms data.
	 * @return null|WP_Error WP_Error on an error assigning any of the terms, otherwise null.
	 */
	protected function handle_terms( $post_id, $request ) {
		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		foreach ( $taxonomies as $taxonomy ) {
			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

			if ( ! isset( $request[ $base ] ) ) {
				continue;
			}

			$result = wp_set_object_terms( $post_id, $request[ $base ], $taxonomy->name );

			if ( is_wp_error( $result ) ) {
				return $result;
			}
		}
	}

	/**
	 * Checks whether current user can assign all terms sent with the current request.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request The request object with post and terms data.
	 * @return bool Whether the current user can assign the provided terms.
	 */
	protected function check_assign_terms_permission( $request ) {
		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );
		foreach ( $taxonomies as $taxonomy ) {
			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

			if ( ! isset( $request[ $base ] ) ) {
				continue;
			}

			foreach ( (array) $request[ $base ] as $term_id ) {
				// Invalid terms will be rejected later.
				if ( ! get_term( $term_id, $taxonomy->name ) ) {
					continue;
				}

				if ( ! current_user_can( 'assign_term', (int) $term_id ) ) {
					return false;
				}
			}
		}

		return true;
	}

	/**
	 * Checks if a given post type can be viewed or managed.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post_Type|string $post_type Post type name or object.
	 * @return bool Whether the post type is allowed in REST.
	 */
	protected function check_is_post_type_allowed( $post_type ) {
		if ( ! is_object( $post_type ) ) {
			$post_type = get_post_type_object( $post_type );
		}

		if ( ! empty( $post_type ) && ! empty( $post_type->show_in_rest ) ) {
			return true;
		}

		return false;
	}

	/**
	 * Checks if a post can be read.
	 *
	 * Correctly handles posts with the inherit status.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post $post Post object.
	 * @return bool Whether the post can be read.
	 */
	public function check_read_permission( $post ) {
		$post_type = get_post_type_object( $post->post_type );
		if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
			return false;
		}

		// Is the post readable?
		if ( 'publish' === $post->post_status || current_user_can( 'read_post', $post->ID ) ) {
			return true;
		}

		$post_status_obj = get_post_status_object( $post->post_status );
		if ( $post_status_obj && $post_status_obj->public ) {
			return true;
		}

		// Can we read the parent if we're inheriting?
		if ( 'inherit' === $post->post_status && $post->post_parent > 0 ) {
			$parent = get_post( $post->post_parent );
			if ( $parent ) {
				return $this->check_read_permission( $parent );
			}
		}

		/*
		 * If there isn't a parent, but the status is set to inherit, assume
		 * it's published (as per get_post_status()).
		 */
		if ( 'inherit' === $post->post_status ) {
			return true;
		}

		return false;
	}

	/**
	 * Checks if a post can be edited.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post $post Post object.
	 * @return bool Whether the post can be edited.
	 */
	protected function check_update_permission( $post ) {
		$post_type = get_post_type_object( $post->post_type );

		if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
			return false;
		}

		return current_user_can( 'edit_post', $post->ID );
	}

	/**
	 * Checks if a post can be created.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post $post Post object.
	 * @return bool Whether the post can be created.
	 */
	protected function check_create_permission( $post ) {
		$post_type = get_post_type_object( $post->post_type );

		if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
			return false;
		}

		return current_user_can( $post_type->cap->create_posts );
	}

	/**
	 * Checks if a post can be deleted.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post $post Post object.
	 * @return bool Whether the post can be deleted.
	 */
	protected function check_delete_permission( $post ) {
		$post_type = get_post_type_object( $post->post_type );

		if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
			return false;
		}

		return current_user_can( 'delete_post', $post->ID );
	}

	/**
	 * Prepares a single post output for response.
	 *
	 * @since 4.7.0
	 * @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
	 *
	 * @param WP_Post         $item    Post object.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response Response object.
	 */
	public function prepare_item_for_response( $item, $request ) {
		// Restores the more descriptive, specific name for use within this method.
		$post            = $item;
		$GLOBALS['post'] = $post;

		setup_postdata( $post );

		$fields = $this->get_fields_for_response( $request );

		// Base fields for every post.
		$data = array();

		if ( rest_is_field_included( 'id', $fields ) ) {
			$data['id'] = $post->ID;
		}

		if ( rest_is_field_included( 'date', $fields ) ) {
			$data['date'] = $this->prepare_date_response( $post->post_date_gmt, $post->post_date );
		}

		if ( rest_is_field_included( 'date_gmt', $fields ) ) {
			/*
			 * For drafts, `post_date_gmt` may not be set, indicating that the date
			 * of the draft should be updated each time it is saved (see #38883).
			 * In this case, shim the value based on the `post_date` field
			 * with the site's timezone offset applied.
			 */
			if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
				$post_date_gmt = get_gmt_from_date( $post->post_date );
			} else {
				$post_date_gmt = $post->post_date_gmt;
			}
			$data['date_gmt'] = $this->prepare_date_response( $post_date_gmt );
		}

		if ( rest_is_field_included( 'guid', $fields ) ) {
			$data['guid'] = array(
				/** This filter is documented in wp-includes/post-template.php */
				'rendered' => apply_filters( 'get_the_guid', $post->guid, $post->ID ),
				'raw'      => $post->guid,
			);
		}

		if ( rest_is_field_included( 'modified', $fields ) ) {
			$data['modified'] = $this->prepare_date_response( $post->post_modified_gmt, $post->post_modified );
		}

		if ( rest_is_field_included( 'modified_gmt', $fields ) ) {
			/*
			 * For drafts, `post_modified_gmt` may not be set (see `post_date_gmt` comments
			 * above). In this case, shim the value based on the `post_modified` field
			 * with the site's timezone offset applied.
			 */
			if ( '0000-00-00 00:00:00' === $post->post_modified_gmt ) {
				$post_modified_gmt = gmdate( 'Y-m-d H:i:s', strtotime( $post->post_modified ) - ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS ) );
			} else {
				$post_modified_gmt = $post->post_modified_gmt;
			}
			$data['modified_gmt'] = $this->prepare_date_response( $post_modified_gmt );
		}

		if ( rest_is_field_included( 'password', $fields ) ) {
			$data['password'] = $post->post_password;
		}

		if ( rest_is_field_included( 'slug', $fields ) ) {
			$data['slug'] = $post->post_name;
		}

		if ( rest_is_field_included( 'status', $fields ) ) {
			$data['status'] = $post->post_status;
		}

		if ( rest_is_field_included( 'type', $fields ) ) {
			$data['type'] = $post->post_type;
		}

		if ( rest_is_field_included( 'link', $fields ) ) {
			$data['link'] = get_permalink( $post->ID );
		}

		if ( rest_is_field_included( 'title', $fields ) ) {
			$data['title'] = array();
		}
		if ( rest_is_field_included( 'title.raw', $fields ) ) {
			$data['title']['raw'] = $post->post_title;
		}
		if ( rest_is_field_included( 'title.rendered', $fields ) ) {
			add_filter( 'protected_title_format', array( $this, 'protected_title_format' ) );

			$data['title']['rendered'] = get_the_title( $post->ID );

			remove_filter( 'protected_title_format', array( $this, 'protected_title_format' ) );
		}

		$has_password_filter = false;

		if ( $this->can_access_password_content( $post, $request ) ) {
			$this->password_check_passed[ $post->ID ] = true;
			// Allow access to the post, permissions already checked before.
			add_filter( 'post_password_required', array( $this, 'check_password_required' ), 10, 2 );

			$has_password_filter = true;
		}

		if ( rest_is_field_included( 'content', $fields ) ) {
			$data['content'] = array();
		}
		if ( rest_is_field_included( 'content.raw', $fields ) ) {
			$data['content']['raw'] = $post->post_content;
		}
		if ( rest_is_field_included( 'content.rendered', $fields ) ) {
			/** This filter is documented in wp-includes/post-template.php */
			$data['content']['rendered'] = post_password_required( $post ) ? '' : apply_filters( 'the_content', $post->post_content );
		}
		if ( rest_is_field_included( 'content.protected', $fields ) ) {
			$data['content']['protected'] = (bool) $post->post_password;
		}
		if ( rest_is_field_included( 'content.block_version', $fields ) ) {
			$data['content']['block_version'] = block_version( $post->post_content );
		}

		if ( rest_is_field_included( 'excerpt', $fields ) ) {
			/** This filter is documented in wp-includes/post-template.php */
			$excerpt = apply_filters( 'get_the_excerpt', $post->post_excerpt, $post );

			/** This filter is documented in wp-includes/post-template.php */
			$excerpt = apply_filters( 'the_excerpt', $excerpt );

			$data['excerpt'] = array(
				'raw'       => $post->post_excerpt,
				'rendered'  => post_password_required( $post ) ? '' : $excerpt,
				'protected' => (bool) $post->post_password,
			);
		}

		if ( $has_password_filter ) {
			// Reset filter.
			remove_filter( 'post_password_required', array( $this, 'check_password_required' ) );
		}

		if ( rest_is_field_included( 'author', $fields ) ) {
			$data['author'] = (int) $post->post_author;
		}

		if ( rest_is_field_included( 'featured_media', $fields ) ) {
			$data['featured_media'] = (int) get_post_thumbnail_id( $post->ID );
		}

		if ( rest_is_field_included( 'parent', $fields ) ) {
			$data['parent'] = (int) $post->post_parent;
		}

		if ( rest_is_field_included( 'menu_order', $fields ) ) {
			$data['menu_order'] = (int) $post->menu_order;
		}

		if ( rest_is_field_included( 'comment_status', $fields ) ) {
			$data['comment_status'] = $post->comment_status;
		}

		if ( rest_is_field_included( 'ping_status', $fields ) ) {
			$data['ping_status'] = $post->ping_status;
		}

		if ( rest_is_field_included( 'sticky', $fields ) ) {
			$data['sticky'] = is_sticky( $post->ID );
		}

		if ( rest_is_field_included( 'template', $fields ) ) {
			$template = get_page_template_slug( $post->ID );
			if ( $template ) {
				$data['template'] = $template;
			} else {
				$data['template'] = '';
			}
		}

		if ( rest_is_field_included( 'format', $fields ) ) {
			$data['format'] = get_post_format( $post->ID );

			// Fill in blank post format.
			if ( empty( $data['format'] ) ) {
				$data['format'] = 'standard';
			}
		}

		if ( rest_is_field_included( 'meta', $fields ) ) {
			$data['meta'] = $this->meta->get_value( $post->ID, $request );
		}

		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		foreach ( $taxonomies as $taxonomy ) {
			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

			if ( rest_is_field_included( $base, $fields ) ) {
				$terms         = get_the_terms( $post, $taxonomy->name );
				$data[ $base ] = $terms ? array_values( wp_list_pluck( $terms, 'term_id' ) ) : array();
			}
		}

		$post_type_obj = get_post_type_object( $post->post_type );
		if ( is_post_type_viewable( $post_type_obj ) && $post_type_obj->public ) {
			$permalink_template_requested = rest_is_field_included( 'permalink_template', $fields );
			$generated_slug_requested     = rest_is_field_included( 'generated_slug', $fields );

			if ( $permalink_template_requested || $generated_slug_requested ) {
				if ( ! function_exists( 'get_sample_permalink' ) ) {
					require_once ABSPATH . 'wp-admin/includes/post.php';
				}

				$sample_permalink = get_sample_permalink( $post->ID, $post->post_title, '' );

				if ( $permalink_template_requested ) {
					$data['permalink_template'] = $sample_permalink[0];
				}

				if ( $generated_slug_requested ) {
					$data['generated_slug'] = $sample_permalink[1];
				}
			}
		}

		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
		$data    = $this->add_additional_fields_to_object( $data, $request );
		$data    = $this->filter_response_by_context( $data, $context );

		// Wrap the data in a response object.
		$response = rest_ensure_response( $data );

		if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
			$links = $this->prepare_links( $post );
			$response->add_links( $links );

			if ( ! empty( $links['self']['href'] ) ) {
				$actions = $this->get_available_actions( $post, $request );

				$self = $links['self']['href'];

				foreach ( $actions as $rel ) {
					$response->add_link( $rel, $self );
				}
			}
		}

		/**
		 * Filters the post data for a REST API response.
		 *
		 * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_prepare_post`
		 *  - `rest_prepare_page`
		 *  - `rest_prepare_attachment`
		 *
		 * @since 4.7.0
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param WP_Post          $post     Post object.
		 * @param WP_REST_Request  $request  Request object.
		 */
		return apply_filters( "rest_prepare_{$this->post_type}", $response, $post, $request );
	}

	/**
	 * Overwrites the default protected title format.
	 *
	 * By default, WordPress will show password protected posts with a title of
	 * "Protected: %s", as the REST API communicates the protected status of a post
	 * in a machine readable format, we remove the "Protected: " prefix.
	 *
	 * @since 4.7.0
	 *
	 * @return string Protected title format.
	 */
	public function protected_title_format() {
		return '%s';
	}

	/**
	 * Prepares links for the request.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post $post Post object.
	 * @return array Links for the given post.
	 */
	protected function prepare_links( $post ) {
		// Entity meta.
		$links = array(
			'self'       => array(
				'href' => rest_url( rest_get_route_for_post( $post->ID ) ),
			),
			'collection' => array(
				'href' => rest_url( rest_get_route_for_post_type_items( $this->post_type ) ),
			),
			'about'      => array(
				'href' => rest_url( 'wp/v2/types/' . $this->post_type ),
			),
		);

		if ( ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'author' ) )
			&& ! empty( $post->post_author ) ) {
			$links['author'] = array(
				'href'       => rest_url( 'wp/v2/users/' . $post->post_author ),
				'embeddable' => true,
			);
		}

		if ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'comments' ) ) {
			$replies_url = rest_url( 'wp/v2/comments' );
			$replies_url = add_query_arg( 'post', $post->ID, $replies_url );

			$links['replies'] = array(
				'href'       => $replies_url,
				'embeddable' => true,
			);
		}

		if ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'revisions' ) ) {
			$revisions       = wp_get_latest_revision_id_and_total_count( $post->ID );
			$revisions_count = ! is_wp_error( $revisions ) ? $revisions['count'] : 0;
			$revisions_base  = sprintf( '/%s/%s/%d/revisions', $this->namespace, $this->rest_base, $post->ID );

			$links['version-history'] = array(
				'href'  => rest_url( $revisions_base ),
				'count' => $revisions_count,
			);

			if ( $revisions_count > 0 ) {
				$links['predecessor-version'] = array(
					'href' => rest_url( $revisions_base . '/' . $revisions['latest_id'] ),
					'id'   => $revisions['latest_id'],
				);
			}
		}

		$post_type_obj = get_post_type_object( $post->post_type );

		if ( $post_type_obj->hierarchical && ! empty( $post->post_parent ) ) {
			$links['up'] = array(
				'href'       => rest_url( rest_get_route_for_post( $post->post_parent ) ),
				'embeddable' => true,
			);
		}

		// If we have a featured media, add that.
		$featured_media = get_post_thumbnail_id( $post->ID );
		if ( $featured_media ) {
			$image_url = rest_url( rest_get_route_for_post( $featured_media ) );

			$links['https://api.w.org/featuredmedia'] = array(
				'href'       => $image_url,
				'embeddable' => true,
			);
		}

		if ( ! in_array( $post->post_type, array( 'attachment', 'nav_menu_item', 'revision' ), true ) ) {
			$attachments_url = rest_url( rest_get_route_for_post_type_items( 'attachment' ) );
			$attachments_url = add_query_arg( 'parent', $post->ID, $attachments_url );

			$links['https://api.w.org/attachment'] = array(
				'href' => $attachments_url,
			);
		}

		$taxonomies = get_object_taxonomies( $post->post_type );

		if ( ! empty( $taxonomies ) ) {
			$links['https://api.w.org/term'] = array();

			foreach ( $taxonomies as $tax ) {
				$taxonomy_route = rest_get_route_for_taxonomy_items( $tax );

				// Skip taxonomies that are not public.
				if ( empty( $taxonomy_route ) ) {
					continue;
				}
				$terms_url = add_query_arg(
					'post',
					$post->ID,
					rest_url( $taxonomy_route )
				);

				$links['https://api.w.org/term'][] = array(
					'href'       => $terms_url,
					'taxonomy'   => $tax,
					'embeddable' => true,
				);
			}
		}

		return $links;
	}

	/**
	 * Gets the link relations available for the post and current user.
	 *
	 * @since 4.9.8
	 *
	 * @param WP_Post         $post    Post object.
	 * @param WP_REST_Request $request Request object.
	 * @return array List of link relations.
	 */
	protected function get_available_actions( $post, $request ) {

		if ( 'edit' !== $request['context'] ) {
			return array();
		}

		$rels = array();

		$post_type = get_post_type_object( $post->post_type );

		if ( 'attachment' !== $this->post_type && current_user_can( $post_type->cap->publish_posts ) ) {
			$rels[] = 'https://api.w.org/action-publish';
		}

		if ( current_user_can( 'unfiltered_html' ) ) {
			$rels[] = 'https://api.w.org/action-unfiltered-html';
		}

		if ( 'post' === $post_type->name ) {
			if ( current_user_can( $post_type->cap->edit_others_posts ) && current_user_can( $post_type->cap->publish_posts ) ) {
				$rels[] = 'https://api.w.org/action-sticky';
			}
		}

		if ( post_type_supports( $post_type->name, 'author' ) ) {
			if ( current_user_can( $post_type->cap->edit_others_posts ) ) {
				$rels[] = 'https://api.w.org/action-assign-author';
			}
		}

		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		foreach ( $taxonomies as $tax ) {
			$tax_base   = ! empty( $tax->rest_base ) ? $tax->rest_base : $tax->name;
			$create_cap = is_taxonomy_hierarchical( $tax->name ) ? $tax->cap->edit_terms : $tax->cap->assign_terms;

			if ( current_user_can( $create_cap ) ) {
				$rels[] = 'https://api.w.org/action-create-' . $tax_base;
			}

			if ( current_user_can( $tax->cap->assign_terms ) ) {
				$rels[] = 'https://api.w.org/action-assign-' . $tax_base;
			}
		}

		return $rels;
	}

	/**
	 * Retrieves the post's schema, conforming to JSON Schema.
	 *
	 * @since 4.7.0
	 *
	 * @return array Item schema data.
	 */
	public function get_item_schema() {
		if ( $this->schema ) {
			return $this->add_additional_fields_schema( $this->schema );
		}

		$schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => $this->post_type,
			'type'       => 'object',
			// Base properties for every Post.
			'properties' => array(
				'date'         => array(
					'description' => __( "The date the post was published, in the site's timezone." ),
					'type'        => array( 'string', 'null' ),
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit', 'embed' ),
				),
				'date_gmt'     => array(
					'description' => __( 'The date the post was published, as GMT.' ),
					'type'        => array( 'string', 'null' ),
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit' ),
				),
				'guid'         => array(
					'description' => __( 'The globally unique identifier for the post.' ),
					'type'        => 'object',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
					'properties'  => array(
						'raw'      => array(
							'description' => __( 'GUID for the post, as it exists in the database.' ),
							'type'        => 'string',
							'context'     => array( 'edit' ),
							'readonly'    => true,
						),
						'rendered' => array(
							'description' => __( 'GUID for the post, transformed for display.' ),
							'type'        => 'string',
							'context'     => array( 'view', 'edit' ),
							'readonly'    => true,
						),
					),
				),
				'id'           => array(
					'description' => __( 'Unique identifier for the post.' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit', 'embed' ),
					'readonly'    => true,
				),
				'link'         => array(
					'description' => __( 'URL to the post.' ),
					'type'        => 'string',
					'format'      => 'uri',
					'context'     => array( 'view', 'edit', 'embed' ),
					'readonly'    => true,
				),
				'modified'     => array(
					'description' => __( "The date the post was last modified, in the site's timezone." ),
					'type'        => 'string',
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'modified_gmt' => array(
					'description' => __( 'The date the post was last modified, as GMT.' ),
					'type'        => 'string',
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'slug'         => array(
					'description' => __( 'An alphanumeric identifier for the post unique to its type.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit', 'embed' ),
					'arg_options' => array(
						'sanitize_callback' => array( $this, 'sanitize_slug' ),
					),
				),
				'status'       => array(
					'description' => __( 'A named status for the post.' ),
					'type'        => 'string',
					'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
					'context'     => array( 'view', 'edit' ),
					'arg_options' => array(
						'validate_callback' => array( $this, 'check_status' ),
					),
				),
				'type'         => array(
					'description' => __( 'Type of post.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit', 'embed' ),
					'readonly'    => true,
				),
				'password'     => array(
					'description' => __( 'A password to protect access to the content and excerpt.' ),
					'type'        => 'string',
					'context'     => array( 'edit' ),
				),
			),
		);

		$post_type_obj = get_post_type_object( $this->post_type );
		if ( is_post_type_viewable( $post_type_obj ) && $post_type_obj->public ) {
			$schema['properties']['permalink_template'] = array(
				'description' => __( 'Permalink template for the post.' ),
				'type'        => 'string',
				'context'     => array( 'edit' ),
				'readonly'    => true,
			);

			$schema['properties']['generated_slug'] = array(
				'description' => __( 'Slug automatically generated from the post title.' ),
				'type'        => 'string',
				'context'     => array( 'edit' ),
				'readonly'    => true,
			);
		}

		if ( $post_type_obj->hierarchical ) {
			$schema['properties']['parent'] = array(
				'description' => __( 'The ID for the parent of the post.' ),
				'type'        => 'integer',
				'context'     => array( 'view', 'edit' ),
			);
		}

		$post_type_attributes = array(
			'title',
			'editor',
			'author',
			'excerpt',
			'thumbnail',
			'comments',
			'revisions',
			'page-attributes',
			'post-formats',
			'custom-fields',
		);
		$fixed_schemas        = array(
			'post'       => array(
				'title',
				'editor',
				'author',
				'excerpt',
				'thumbnail',
				'comments',
				'revisions',
				'post-formats',
				'custom-fields',
			),
			'page'       => array(
				'title',
				'editor',
				'author',
				'excerpt',
				'thumbnail',
				'comments',
				'revisions',
				'page-attributes',
				'custom-fields',
			),
			'attachment' => array(
				'title',
				'author',
				'comments',
				'revisions',
				'custom-fields',
			),
		);

		foreach ( $post_type_attributes as $attribute ) {
			if ( isset( $fixed_schemas[ $this->post_type ] ) && ! in_array( $attribute, $fixed_schemas[ $this->post_type ], true ) ) {
				continue;
			} elseif ( ! isset( $fixed_schemas[ $this->post_type ] ) && ! post_type_supports( $this->post_type, $attribute ) ) {
				continue;
			}

			switch ( $attribute ) {

				case 'title':
					$schema['properties']['title'] = array(
						'description' => __( 'The title for the post.' ),
						'type'        => 'object',
						'context'     => array( 'view', 'edit', 'embed' ),
						'arg_options' => array(
							'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database().
							'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database().
						),
						'properties'  => array(
							'raw'      => array(
								'description' => __( 'Title for the post, as it exists in the database.' ),
								'type'        => 'string',
								'context'     => array( 'edit' ),
							),
							'rendered' => array(
								'description' => __( 'HTML title for the post, transformed for display.' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit', 'embed' ),
								'readonly'    => true,
							),
						),
					);
					break;

				case 'editor':
					$schema['properties']['content'] = array(
						'description' => __( 'The content for the post.' ),
						'type'        => 'object',
						'context'     => array( 'view', 'edit' ),
						'arg_options' => array(
							'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database().
							'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database().
						),
						'properties'  => array(
							'raw'           => array(
								'description' => __( 'Content for the post, as it exists in the database.' ),
								'type'        => 'string',
								'context'     => array( 'edit' ),
							),
							'rendered'      => array(
								'description' => __( 'HTML content for the post, transformed for display.' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'block_version' => array(
								'description' => __( 'Version of the content block format used by the post.' ),
								'type'        => 'integer',
								'context'     => array( 'edit' ),
								'readonly'    => true,
							),
							'protected'     => array(
								'description' => __( 'Whether the content is protected with a password.' ),
								'type'        => 'boolean',
								'context'     => array( 'view', 'edit', 'embed' ),
								'readonly'    => true,
							),
						),
					);
					break;

				case 'author':
					$schema['properties']['author'] = array(
						'description' => __( 'The ID for the author of the post.' ),
						'type'        => 'integer',
						'context'     => array( 'view', 'edit', 'embed' ),
					);
					break;

				case 'excerpt':
					$schema['properties']['excerpt'] = array(
						'description' => __( 'The excerpt for the post.' ),
						'type'        => 'object',
						'context'     => array( 'view', 'edit', 'embed' ),
						'arg_options' => array(
							'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database().
							'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database().
						),
						'properties'  => array(
							'raw'       => array(
								'description' => __( 'Excerpt for the post, as it exists in the database.' ),
								'type'        => 'string',
								'context'     => array( 'edit' ),
							),
							'rendered'  => array(
								'description' => __( 'HTML excerpt for the post, transformed for display.' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit', 'embed' ),
								'readonly'    => true,
							),
							'protected' => array(
								'description' => __( 'Whether the excerpt is protected with a password.' ),
								'type'        => 'boolean',
								'context'     => array( 'view', 'edit', 'embed' ),
								'readonly'    => true,
							),
						),
					);
					break;

				case 'thumbnail':
					$schema['properties']['featured_media'] = array(
						'description' => __( 'The ID of the featured media for the post.' ),
						'type'        => 'integer',
						'context'     => array( 'view', 'edit', 'embed' ),
					);
					break;

				case 'comments':
					$schema['properties']['comment_status'] = array(
						'description' => __( 'Whether or not comments are open on the post.' ),
						'type'        => 'string',
						'enum'        => array( 'open', 'closed' ),
						'context'     => array( 'view', 'edit' ),
					);
					$schema['properties']['ping_status']    = array(
						'description' => __( 'Whether or not the post can be pinged.' ),
						'type'        => 'string',
						'enum'        => array( 'open', 'closed' ),
						'context'     => array( 'view', 'edit' ),
					);
					break;

				case 'page-attributes':
					$schema['properties']['menu_order'] = array(
						'description' => __( 'The order of the post in relation to other posts.' ),
						'type'        => 'integer',
						'context'     => array( 'view', 'edit' ),
					);
					break;

				case 'post-formats':
					// Get the native post formats and remove the array keys.
					$formats = array_values( get_post_format_slugs() );

					$schema['properties']['format'] = array(
						'description' => __( 'The format for the post.' ),
						'type'        => 'string',
						'enum'        => $formats,
						'context'     => array( 'view', 'edit' ),
					);
					break;

				case 'custom-fields':
					$schema['properties']['meta'] = $this->meta->get_field_schema();
					break;

			}
		}

		if ( 'post' === $this->post_type ) {
			$schema['properties']['sticky'] = array(
				'description' => __( 'Whether or not the post should be treated as sticky.' ),
				'type'        => 'boolean',
				'context'     => array( 'view', 'edit' ),
			);
		}

		$schema['properties']['template'] = array(
			'description' => __( 'The theme file to use to display the post.' ),
			'type'        => 'string',
			'context'     => array( 'view', 'edit' ),
			'arg_options' => array(
				'validate_callback' => array( $this, 'check_template' ),
			),
		);

		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		foreach ( $taxonomies as $taxonomy ) {
			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

			if ( array_key_exists( $base, $schema['properties'] ) ) {
				$taxonomy_field_name_with_conflict = ! empty( $taxonomy->rest_base ) ? 'rest_base' : 'name';
				_doing_it_wrong(
					'register_taxonomy',
					sprintf(
						/* translators: 1: The taxonomy name, 2: The property name, either 'rest_base' or 'name', 3: The conflicting value. */
						__( 'The "%1$s" taxonomy "%2$s" property (%3$s) conflicts with an existing property on the REST API Posts Controller. Specify a custom "rest_base" when registering the taxonomy to avoid this error.' ),
						$taxonomy->name,
						$taxonomy_field_name_with_conflict,
						$base
					),
					'5.4.0'
				);
			}

			$schema['properties'][ $base ] = array(
				/* translators: %s: Taxonomy name. */
				'description' => sprintf( __( 'The terms assigned to the post in the %s taxonomy.' ), $taxonomy->name ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
				'context'     => array( 'view', 'edit' ),
			);
		}

		$schema_links = $this->get_schema_links();

		if ( $schema_links ) {
			$schema['links'] = $schema_links;
		}

		// Take a snapshot of which fields are in the schema pre-filtering.
		$schema_fields = array_keys( $schema['properties'] );

		/**
		 * Filters the post's schema.
		 *
		 * The dynamic portion of the filter, `$this->post_type`, refers to the
		 * post type slug for the controller.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_post_item_schema`
		 *  - `rest_page_item_schema`
		 *  - `rest_attachment_item_schema`
		 *
		 * @since 5.4.0
		 *
		 * @param array $schema Item schema data.
		 */
		$schema = apply_filters( "rest_{$this->post_type}_item_schema", $schema );

		// Emit a _doing_it_wrong warning if user tries to add new properties using this filter.
		$new_fields = array_diff( array_keys( $schema['properties'] ), $schema_fields );
		if ( count( $new_fields ) > 0 ) {
			_doing_it_wrong(
				__METHOD__,
				sprintf(
					/* translators: %s: register_rest_field */
					__( 'Please use %s to add new schema properties.' ),
					'register_rest_field'
				),
				'5.4.0'
			);
		}

		$this->schema = $schema;

		return $this->add_additional_fields_schema( $this->schema );
	}

	/**
	 * Retrieves Link Description Objects that should be added to the Schema for the posts collection.
	 *
	 * @since 4.9.8
	 *
	 * @return array
	 */
	protected function get_schema_links() {

		$href = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );

		$links = array();

		if ( 'attachment' !== $this->post_type ) {
			$links[] = array(
				'rel'          => 'https://api.w.org/action-publish',
				'title'        => __( 'The current user can publish this post.' ),
				'href'         => $href,
				'targetSchema' => array(
					'type'       => 'object',
					'properties' => array(
						'status' => array(
							'type' => 'string',
							'enum' => array( 'publish', 'future' ),
						),
					),
				),
			);
		}

		$links[] = array(
			'rel'          => 'https://api.w.org/action-unfiltered-html',
			'title'        => __( 'The current user can post unfiltered HTML markup and JavaScript.' ),
			'href'         => $href,
			'targetSchema' => array(
				'type'       => 'object',
				'properties' => array(
					'content' => array(
						'raw' => array(
							'type' => 'string',
						),
					),
				),
			),
		);

		if ( 'post' === $this->post_type ) {
			$links[] = array(
				'rel'          => 'https://api.w.org/action-sticky',
				'title'        => __( 'The current user can sticky this post.' ),
				'href'         => $href,
				'targetSchema' => array(
					'type'       => 'object',
					'properties' => array(
						'sticky' => array(
							'type' => 'boolean',
						),
					),
				),
			);
		}

		if ( post_type_supports( $this->post_type, 'author' ) ) {
			$links[] = array(
				'rel'          => 'https://api.w.org/action-assign-author',
				'title'        => __( 'The current user can change the author on this post.' ),
				'href'         => $href,
				'targetSchema' => array(
					'type'       => 'object',
					'properties' => array(
						'author' => array(
							'type' => 'integer',
						),
					),
				),
			);
		}

		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		foreach ( $taxonomies as $tax ) {
			$tax_base = ! empty( $tax->rest_base ) ? $tax->rest_base : $tax->name;

			/* translators: %s: Taxonomy name. */
			$assign_title = sprintf( __( 'The current user can assign terms in the %s taxonomy.' ), $tax->name );
			/* translators: %s: Taxonomy name. */
			$create_title = sprintf( __( 'The current user can create terms in the %s taxonomy.' ), $tax->name );

			$links[] = array(
				'rel'          => 'https://api.w.org/action-assign-' . $tax_base,
				'title'        => $assign_title,
				'href'         => $href,
				'targetSchema' => array(
					'type'       => 'object',
					'properties' => array(
						$tax_base => array(
							'type'  => 'array',
							'items' => array(
								'type' => 'integer',
							),
						),
					),
				),
			);

			$links[] = array(
				'rel'          => 'https://api.w.org/action-create-' . $tax_base,
				'title'        => $create_title,
				'href'         => $href,
				'targetSchema' => array(
					'type'       => 'object',
					'properties' => array(
						$tax_base => array(
							'type'  => 'array',
							'items' => array(
								'type' => 'integer',
							),
						),
					),
				),
			);
		}

		return $links;
	}

	/**
	 * Retrieves the query params for the posts collection.
	 *
	 * @since 4.7.0
	 * @since 5.4.0 The `tax_relation` query parameter was added.
	 * @since 5.7.0 The `modified_after` and `modified_before` query parameters were added.
	 *
	 * @return array Collection parameters.
	 */
	public function get_collection_params() {
		$query_params = parent::get_collection_params();

		$query_params['context']['default'] = 'view';

		$query_params['after'] = array(
			'description' => __( 'Limit response to posts published after a given ISO8601 compliant date.' ),
			'type'        => 'string',
			'format'      => 'date-time',
		);

		$query_params['modified_after'] = array(
			'description' => __( 'Limit response to posts modified after a given ISO8601 compliant date.' ),
			'type'        => 'string',
			'format'      => 'date-time',
		);

		if ( post_type_supports( $this->post_type, 'author' ) ) {
			$query_params['author']         = array(
				'description' => __( 'Limit result set to posts assigned to specific authors.' ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
				'default'     => array(),
			);
			$query_params['author_exclude'] = array(
				'description' => __( 'Ensure result set excludes posts assigned to specific authors.' ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
				'default'     => array(),
			);
		}

		$query_params['before'] = array(
			'description' => __( 'Limit response to posts published before a given ISO8601 compliant date.' ),
			'type'        => 'string',
			'format'      => 'date-time',
		);

		$query_params['modified_before'] = array(
			'description' => __( 'Limit response to posts modified before a given ISO8601 compliant date.' ),
			'type'        => 'string',
			'format'      => 'date-time',
		);

		$query_params['exclude'] = array(
			'description' => __( 'Ensure result set excludes specific IDs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'integer',
			),
			'default'     => array(),
		);

		$query_params['include'] = array(
			'description' => __( 'Limit result set to specific IDs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'integer',
			),
			'default'     => array(),
		);

		if ( 'page' === $this->post_type || post_type_supports( $this->post_type, 'page-attributes' ) ) {
			$query_params['menu_order'] = array(
				'description' => __( 'Limit result set to posts with a specific menu_order value.' ),
				'type'        => 'integer',
			);
		}

		$query_params['offset'] = array(
			'description' => __( 'Offset the result set by a specific number of items.' ),
			'type'        => 'integer',
		);

		$query_params['order'] = array(
			'description' => __( 'Order sort attribute ascending or descending.' ),
			'type'        => 'string',
			'default'     => 'desc',
			'enum'        => array( 'asc', 'desc' ),
		);

		$query_params['orderby'] = array(
			'description' => __( 'Sort collection by post attribute.' ),
			'type'        => 'string',
			'default'     => 'date',
			'enum'        => array(
				'author',
				'date',
				'id',
				'include',
				'modified',
				'parent',
				'relevance',
				'slug',
				'include_slugs',
				'title',
			),
		);

		if ( 'page' === $this->post_type || post_type_supports( $this->post_type, 'page-attributes' ) ) {
			$query_params['orderby']['enum'][] = 'menu_order';
		}

		$post_type = get_post_type_object( $this->post_type );

		if ( $post_type->hierarchical || 'attachment' === $this->post_type ) {
			$query_params['parent']         = array(
				'description' => __( 'Limit result set to items with particular parent IDs.' ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
				'default'     => array(),
			);
			$query_params['parent_exclude'] = array(
				'description' => __( 'Limit result set to all items except those of a particular parent ID.' ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
				'default'     => array(),
			);
		}

		$query_params['search_columns'] = array(
			'default'     => array(),
			'description' => __( 'Array of column names to be searched.' ),
			'type'        => 'array',
			'items'       => array(
				'enum' => array( 'post_title', 'post_content', 'post_excerpt' ),
				'type' => 'string',
			),
		);

		$query_params['slug'] = array(
			'description' => __( 'Limit result set to posts with one or more specific slugs.' ),
			'type'        => 'array',
			'items'       => array(
				'type' => 'string',
			),
		);

		$query_params['status'] = array(
			'default'           => 'publish',
			'description'       => __( 'Limit result set to posts assigned one or more statuses.' ),
			'type'              => 'array',
			'items'             => array(
				'enum' => array_merge( array_keys( get_post_stati() ), array( 'any' ) ),
				'type' => 'string',
			),
			'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
		);

		$query_params = $this->prepare_taxonomy_limit_schema( $query_params );

		if ( 'post' === $this->post_type ) {
			$query_params['sticky'] = array(
				'description' => __( 'Limit result set to items that are sticky.' ),
				'type'        => 'boolean',
			);
		}

		/**
		 * Filters collection parameters for the posts controller.
		 *
		 * The dynamic part of the filter `$this->post_type` refers to the post
		 * type slug for the controller.
		 *
		 * This filter registers the collection parameter, but does not map the
		 * collection parameter to an internal WP_Query parameter. Use the
		 * `rest_{$this->post_type}_query` filter to set WP_Query parameters.
		 *
		 * @since 4.7.0
		 *
		 * @param array        $query_params JSON Schema-formatted collection parameters.
		 * @param WP_Post_Type $post_type    Post type object.
		 */
		return apply_filters( "rest_{$this->post_type}_collection_params", $query_params, $post_type );
	}

	/**
	 * Sanitizes and validates the list of post statuses, including whether the
	 * user can query private statuses.
	 *
	 * @since 4.7.0
	 *
	 * @param string|array    $statuses  One or more post statuses.
	 * @param WP_REST_Request $request   Full details about the request.
	 * @param string          $parameter Additional parameter to pass to validation.
	 * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
	 */
	public function sanitize_post_statuses( $statuses, $request, $parameter ) {
		$statuses = wp_parse_slug_list( $statuses );

		// The default status is different in WP_REST_Attachments_Controller.
		$attributes     = $request->get_attributes();
		$default_status = $attributes['args']['status']['default'];

		foreach ( $statuses as $status ) {
			if ( $status === $default_status ) {
				continue;
			}

			$post_type_obj = get_post_type_object( $this->post_type );

			if ( current_user_can( $post_type_obj->cap->edit_posts ) || 'private' === $status && current_user_can( $post_type_obj->cap->read_private_posts ) ) {
				$result = rest_validate_request_arg( $status, $request, $parameter );
				if ( is_wp_error( $result ) ) {
					return $result;
				}
			} else {
				return new WP_Error(
					'rest_forbidden_status',
					__( 'Status is forbidden.' ),
					array( 'status' => rest_authorization_required_code() )
				);
			}
		}

		return $statuses;
	}

	/**
	 * Prepares the 'tax_query' for a collection of posts.
	 *
	 * @since 5.7.0
	 *
	 * @param array           $args    WP_Query arguments.
	 * @param WP_REST_Request $request Full details about the request.
	 * @return array Updated query arguments.
	 */
	private function prepare_tax_query( array $args, WP_REST_Request $request ) {
		$relation = $request['tax_relation'];

		if ( $relation ) {
			$args['tax_query'] = array( 'relation' => $relation );
		}

		$taxonomies = wp_list_filter(
			get_object_taxonomies( $this->post_type, 'objects' ),
			array( 'show_in_rest' => true )
		);

		foreach ( $taxonomies as $taxonomy ) {
			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

			$tax_include = $request[ $base ];
			$tax_exclude = $request[ $base . '_exclude' ];

			if ( $tax_include ) {
				$terms            = array();
				$include_children = false;
				$operator         = 'IN';

				if ( rest_is_array( $tax_include ) ) {
					$terms = $tax_include;
				} elseif ( rest_is_object( $tax_include ) ) {
					$terms            = empty( $tax_include['terms'] ) ? array() : $tax_include['terms'];
					$include_children = ! empty( $tax_include['include_children'] );

					if ( isset( $tax_include['operator'] ) && 'AND' === $tax_include['operator'] ) {
						$operator = 'AND';
					}
				}

				if ( $terms ) {
					$args['tax_query'][] = array(
						'taxonomy'         => $taxonomy->name,
						'field'            => 'term_id',
						'terms'            => $terms,
						'include_children' => $include_children,
						'operator'         => $operator,
					);
				}
			}

			if ( $tax_exclude ) {
				$terms            = array();
				$include_children = false;

				if ( rest_is_array( $tax_exclude ) ) {
					$terms = $tax_exclude;
				} elseif ( rest_is_object( $tax_exclude ) ) {
					$terms            = empty( $tax_exclude['terms'] ) ? array() : $tax_exclude['terms'];
					$include_children = ! empty( $tax_exclude['include_children'] );
				}

				if ( $terms ) {
					$args['tax_query'][] = array(
						'taxonomy'         => $taxonomy->name,
						'field'            => 'term_id',
						'terms'            => $terms,
						'include_children' => $include_children,
						'operator'         => 'NOT IN',
					);
				}
			}
		}

		return $args;
	}

	/**
	 * Prepares the collection schema for including and excluding items by terms.
	 *
	 * @since 5.7.0
	 *
	 * @param array $query_params Collection schema.
	 * @return array Updated schema.
	 */
	private function prepare_taxonomy_limit_schema( array $query_params ) {
		$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

		if ( ! $taxonomies ) {
			return $query_params;
		}

		$query_params['tax_relation'] = array(
			'description' => __( 'Limit result set based on relationship between multiple taxonomies.' ),
			'type'        => 'string',
			'enum'        => array( 'AND', 'OR' ),
		);

		$limit_schema = array(
			'type'  => array( 'object', 'array' ),
			'oneOf' => array(
				array(
					'title'       => __( 'Term ID List' ),
					'description' => __( 'Match terms with the listed IDs.' ),
					'type'        => 'array',
					'items'       => array(
						'type' => 'integer',
					),
				),
				array(
					'title'                => __( 'Term ID Taxonomy Query' ),
					'description'          => __( 'Perform an advanced term query.' ),
					'type'                 => 'object',
					'properties'           => array(
						'terms'            => array(
							'description' => __( 'Term IDs.' ),
							'type'        => 'array',
							'items'       => array(
								'type' => 'integer',
							),
							'default'     => array(),
						),
						'include_children' => array(
							'description' => __( 'Whether to include child terms in the terms limiting the result set.' ),
							'type'        => 'boolean',
							'default'     => false,
						),
					),
					'additionalProperties' => false,
				),
			),
		);

		$include_schema = array_merge(
			array(
				/* translators: %s: Taxonomy name. */
				'description' => __( 'Limit result set to items with specific terms assigned in the %s taxonomy.' ),
			),
			$limit_schema
		);
		// 'operator' is supported only for 'include' queries.
		$include_schema['oneOf'][1]['properties']['operator'] = array(
			'description' => __( 'Whether items must be assigned all or any of the specified terms.' ),
			'type'        => 'string',
			'enum'        => array( 'AND', 'OR' ),
			'default'     => 'OR',
		);

		$exclude_schema = array_merge(
			array(
				/* translators: %s: Taxonomy name. */
				'description' => __( 'Limit result set to items except those with specific terms assigned in the %s taxonomy.' ),
			),
			$limit_schema
		);

		foreach ( $taxonomies as $taxonomy ) {
			$base         = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
			$base_exclude = $base . '_exclude';

			$query_params[ $base ]                = $include_schema;
			$query_params[ $base ]['description'] = sprintf( $query_params[ $base ]['description'], $base );

			$query_params[ $base_exclude ]                = $exclude_schema;
			$query_params[ $base_exclude ]['description'] = sprintf( $query_params[ $base_exclude ]['description'], $base );

			if ( ! $taxonomy->hierarchical ) {
				unset( $query_params[ $base ]['oneOf'][1]['properties']['include_children'] );
				unset( $query_params[ $base_exclude ]['oneOf'][1]['properties']['include_children'] );
			}
		}

		return $query_params;
	}
}