Block library: Extract deprecated field to their own files (#15057)

* Block library: Extracte deprecated fields to their own files

* Block library: Remove obsolete deprecations from List block

* Block library: Remove obsolete deprecations from Heading block

packages/block-library/src/gallery/deprecated.js

@@ -0,0 +1,198 @@
+/**
+ * External dependencies
+ */
+import classnames from 'classnames';
+import { map, some } from 'lodash';
+
+/**
+ * WordPress dependencies
+ */
+import { RichText } from '@wordpress/block-editor';
+
+/**
+ * Internal dependencies
+ */
+import { defaultColumnsNumber } from './shared';
+
+const deprecated = [
+	{
+		attributes: {
+			images: {
+				type: 'array',
+				default: [],
+				source: 'query',
+				selector: 'ul.wp-block-gallery .blocks-gallery-item',
+				query: {
+					url: {
+						source: 'attribute',
+						selector: 'img',
+						attribute: 'src',
+					},
+					alt: {
+						source: 'attribute',
+						selector: 'img',
+						attribute: 'alt',
+						default: '',
+					},
+					id: {
+						source: 'attribute',
+						selector: 'img',
+						attribute: 'data-id',
+					},
+					link: {
+						source: 'attribute',
+						selector: 'img',
+						attribute: 'data-link',
+					},
+					caption: {
+						type: 'array',
+						source: 'children',
+						selector: 'figcaption',
+					},
+				},
+			},
+			columns: {
+				type: 'number',
+			},
+			imageCrop: {
+				type: 'boolean',
+				default: true,
+			},
+			linkTo: {
+				type: 'string',
+				default: 'none',
+			},
+		},
+		isEligible( { images, ids } ) {
+			return images &&
+				images.length > 0 &&
+				(
+					( ! ids && images ) ||
+					( ids && images && ids.length !== images.length ) ||
+					some( images, ( id, index ) => {
+						if ( ! id && ids[ index ] !== null ) {
+							return true;
+						}
+						return parseInt( id, 10 ) !== ids[ index ];
+					} )
+				);
+		},
+		migrate( attributes ) {
+			return {
+				...attributes,
+				ids: map( attributes.images, ( { id } ) => {
+					if ( ! id ) {
+						return null;
+					}
+					return parseInt( id, 10 );
+				} ),
+			};
+		},
+		save( { attributes } ) {
+			const { images, columns = defaultColumnsNumber( attributes ), imageCrop, linkTo } = attributes;
+			return (
+				<ul className={ `columns-${ columns } ${ imageCrop ? 'is-cropped' : '' }` } >
+					{ images.map( ( image ) => {
+						let href;
+
+						switch ( linkTo ) {
+							case 'media':
+								href = image.url;
+								break;
+							case 'attachment':
+								href = image.link;
+								break;
+						}
+
+						const img = <img src={ image.url } alt={ image.alt } data-id={ image.id } data-link={ image.link } className={ image.id ? `wp-image-${ image.id }` : null } />;
+
+						return (
+							<li key={ image.id || image.url } className="blocks-gallery-item">
+								<figure>
+									{ href ? <a href={ href }>{ img }</a> : img }
+									{ image.caption && image.caption.length > 0 && (
+										<RichText.Content tagName="figcaption" value={ image.caption } />
+									) }
+								</figure>
+							</li>
+						);
+					} ) }
+				</ul>
+			);
+		},
+	},
+	{
+		attributes: {
+			images: {
+				type: 'array',
+				default: [],
+				source: 'query',
+				selector: 'div.wp-block-gallery figure.blocks-gallery-image img',
+				query: {
+					url: {
+						source: 'attribute',
+						attribute: 'src',
+					},
+					alt: {
+						source: 'attribute',
+						attribute: 'alt',
+						default: '',
+					},
+					id: {
+						source: 'attribute',
+						attribute: 'data-id',
+					},
+				},
+			},
+			columns: {
+				type: 'number',
+			},
+			imageCrop: {
+				type: 'boolean',
+				default: true,
+			},
+			linkTo: {
+				type: 'string',
+				default: 'none',
+			},
+			align: {
+				type: 'string',
+				default: 'none',
+			},
+		},
+
+		save( { attributes } ) {
+			const { images, columns = defaultColumnsNumber( attributes ), align, imageCrop, linkTo } = attributes;
+			const className = classnames( `columns-${ columns }`, {
+				alignnone: align === 'none',
+				'is-cropped': imageCrop,
+			} );
+			return (
+				<div className={ className } >
+					{ images.map( ( image ) => {
+						let href;
+
+						switch ( linkTo ) {
+							case 'media':
+								href = image.url;
+								break;
+							case 'attachment':
+								href = image.link;
+								break;
+						}
+
+						const img = <img src={ image.url } alt={ image.alt } data-id={ image.id } />;
+
+						return (
+							<figure key={ image.id || image.url } className="blocks-gallery-image">
+								{ href ? <a href={ href }>{ img }</a> : img }
+							</figure>
+						);
+					} ) }
+				</div>
+			);
+		},
+	},
+];
+
+export default deprecated;