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import { useEffect } from '@wordpress/element';
import { getBlockType } from '@wordpress/blocks';
import hasNumericValue from '../utils/has-numeric-value';
import wasBlockJustInserted from '../utils/was-block-just-inserted';
import isBlockVersionLessThan from '../utils/check-block-version';
import { migrationPipe, updateBlockVersion, setIsDynamic } from './migrations/utils';
import migrateSpacing from './migrations/migrateSpacing';
import migrateBorders from './migrations/migrateBorders';
import migrateTypography from './migrations/migrateTypography';
import migrateSizing from './migrations/migrateSizing';
import { isEmpty } from 'lodash';

/**
 * Add late-added attributes to the bgOptions object.
 * This was to prevent an error where `selector` was undefined.
 *
 * @param {Object} attrs         New attributes from previous migrations.
 * @param {Object} existingAttrs Pre-existing block attributes.
 * @param {string} mode          The migration mode.
 * @return {Object} Updated attributes.
 * @since 1.1.2
 */
export function migrateBgSelectorOpacity( attrs, existingAttrs, mode ) {
	if ( 'css' === mode ) {
		return attrs;
	}

if ( ! existingAttrs.bgOptions || ! Object.keys( existingAttrs.bgOptions ).length ) {
		return attrs;
	}

if ( 'undefined' === typeof existingAttrs.bgOptions.selector ) {
		attrs = {
			...attrs,
			bgOptions: {
				...existingAttrs.bgOptions,
				...attrs.bgOptions,
				selector: 'element',
			},
		};
	}

if ( 'undefined' === typeof existingAttrs.bgOptions.opacity ) {
		attrs = {
			...attrs,
			bgOptions: {
				...existingAttrs.bgOptions,
				...attrs.bgOptions,
				opacity: 1,
			},
		};
	}

return attrs;
}

/**
 * Set our old defaults as static values.
 *
 * @param {Object} Props                      Function props.
 * @param {number} Props.blockVersionLessThan The version blocks should be less than for this to run.
 * @param {Object} Props.oldDefaults          Old defaults that were changed and need to be added to attributes.
 * @return {Object} Updated attributes.
 * @since 1.4.0
 */
export function migrateOldContainerDefaults( { blockVersionLessThan, oldDefaults } ) {
	return function( attrs, existingAttrs, mode ) {
		if ( 'css' === mode ) {
			return attrs;
		}

if ( ! wasBlockJustInserted( existingAttrs ) && isBlockVersionLessThan( existingAttrs.blockVersion, blockVersionLessThan ) ) {
			const useGlobalStyle = 'undefined' !== typeof existingAttrs.useGlobalStyle && existingAttrs.useGlobalStyle;
			const items = [];

if ( ! useGlobalStyle ) {
				items.push(
					'paddingTop',
					'paddingRight',
					'paddingBottom',
					'paddingLeft',
				);
			}

if ( existingAttrs.isGrid ) {
				items.push(
					'width',
					'widthMobile',
				);
			}

if ( existingAttrs.gradient ) {
				items.push(
					'gradientDirection',
					'gradientColorOne',
					'gradientColorOneOpacity',
					'gradientColorTwo',
					'gradientColorTwoOpacity'
				);
			}

items.forEach( ( item ) => {
				if ( ! hasNumericValue( existingAttrs[ item ] ) ) {
					attrs[ item ] = oldDefaults[ item ];
				}
			} );
		}

return attrs;
	};
}

/**
 * Set our inner z-index if we're using a gradient overlay or pseudo background.
 *
 * @param {Object} Props                      Function props.
 * @param {number} Props.blockVersionLessThan The version blocks should be less than for this to run.
 * @return {Object} Updated attributes.
 * @since 1.4.0
 */
export function migrateContainerZIndex( { blockVersionLessThan } ) {
	return function( attrs, existingAttrs, mode ) {
		if ( 'css' === mode ) {
			return attrs;
		}

if ( ! wasBlockJustInserted( existingAttrs ) && isBlockVersionLessThan( existingAttrs.blockVersion, blockVersionLessThan ) ) {
			let updateOldZindex =
			existingAttrs.gradient && 'pseudo-element' === existingAttrs.gradientSelector &&
				! hasNumericValue( existingAttrs.innerZindex );

if ( ! updateOldZindex ) {
				updateOldZindex = !! existingAttrs.bgImage && 'undefined' !== typeof existingAttrs.bgOptions.selector && 'pseudo-element' === existingAttrs.bgOptions.selector;
			}

if ( ! updateOldZindex ) {
				updateOldZindex = 'undefined' !== typeof existingAttrs.useAdvBackgrounds && existingAttrs.useAdvBackgrounds;
			}

if ( updateOldZindex ) {
				attrs.innerZindex = 1;
			}
		}

return attrs;
	};
}

/**
 * Set our useInnerContainer attribute on old Containers.
 *
 * @param {Object} Props                      Function props.
 * @param {number} Props.blockVersionLessThan The version blocks should be less than for this to run.
 * @return {Object} Updated attributes.
 * @since 1.7.0
 */
export function migrateInnerContainer( { blockVersionLessThan } ) {
	return function( attrs, existingAttrs, mode ) {
		if ( 'css' === mode ) {
			return attrs;
		}

if ( ! wasBlockJustInserted( existingAttrs ) && isBlockVersionLessThan( existingAttrs.blockVersion, blockVersionLessThan ) ) {
			attrs.useInnerContainer = true;
		}

return attrs;
	};
}

/**
 * Migrate our flexBasis attributes to include their unit.
 *
 * @param {Object} Props                      Function props.
 * @param {number} Props.blockVersionLessThan The version blocks should be less than for this to run.
 * @return {Object} Updated attributes.
 * @since 1.7.0
 */
export function migrateFlexBasis( { blockVersionLessThan } ) {
	return function( attrs, existingAttrs, mode ) {
		if ( 'css' === mode ) {
			return attrs;
		}

if ( ! wasBlockJustInserted( existingAttrs ) && isBlockVersionLessThan( existingAttrs.blockVersion, blockVersionLessThan ) ) {
			[ '', 'Tablet', 'Mobile' ].forEach( ( device ) => {
				if ( existingAttrs[ 'flexBasis' + device ] && ! isNaN( existingAttrs[ 'flexBasis' + device ] ) ) {
					attrs[ 'flexBasis' + device ] = existingAttrs[ 'flexBasis' + device ] + existingAttrs.flexBasisUnit;
				}
			} );
		}

return attrs;
	};
}

export const currentBlockVersion = 4;

/**
 * Migrate our Container attributes.
 *
 * @param {Object} Props             Function props.
 * @param {Object} Props.attributes  The block attributes.
 * @param {Object} Props.defaults    The block defaults.
 * @param {string} Props.mode        The migration mode.
 * @param {Object} Props.oldDefaults An object of old defaults keyed by version.
 * @return {Object} Updated attributes.
 * @since 1.8.0
 */
export function migrateContainerAttributes( { attributes, defaults, mode = '', oldDefaults = {} } ) {
	return migrationPipe(
		attributes,
		[
			setIsDynamic,
			migrateBgSelectorOpacity,
			migrateContainerZIndex( {
				blockVersionLessThan: 2,
			} ),
			migrateOldContainerDefaults( {
				blockVersionLessThan: 2,
				oldDefaults: oldDefaults.v1_4_0,
			} ),
			migrateInnerContainer( {
				blockVersionLessThan: 3,
			} ),
			migrateFlexBasis( {
				blockVersionLessThan: 3,
			} ),
			migrateSizing( {
				blockVersionLessThan: 3,
			} ),
			migrateSpacing( {
				blockVersionLessThan: 4,
				defaults,
				attributesToMigrate: [
					'paddingTop',
					'paddingRight',
					'paddingBottom',
					'paddingLeft',
					'marginTop',
					'marginRight',
					'marginBottom',
					'marginLeft',
				],
			} ),
			migrateBorders( {
				blockVersionLessThan: 4,
				defaults,
				attributesToMigrate: [
					'borderSizeTop',
					'borderSizeRight',
					'borderSizeBottom',
					'borderSizeLeft',
					'borderRadiusTopRight',
					'borderRadiusBottomRight',
					'borderRadiusBottomLeft',
					'borderRadiusTopLeft',
				],
			} ),
			migrateTypography( {
				blockVersionLessThan: 4,
				defaults,
				attributesToMigrate: [
					'fontFamily',
					'fontSize',
					'fontWeight',
					'textTransform',
					'alignment',
				],
			} ),
			updateBlockVersion( currentBlockVersion ),
		],
		mode
	);
}

export default ( WrappedComponent ) => {
	return ( props ) => {
		const {
			attributes,
			setAttributes,
		} = props;

useEffect( () => {
			const newAttributes = migrateContainerAttributes( {
				attributes,
				defaults: getBlockType( 'generateblocks/container' )?.attributes,
				oldDefaults: {
					v1_4_0: generateBlocksLegacyDefaults.v_1_4_0.container,
				},
			} );

if ( ! isEmpty( newAttributes ) ) {
				setAttributes( newAttributes );
			}
		}, [] );

return ( <WrappedComponent { ...props } /> );
	};
};