Add source for Gutenberg extensions

The source for block editor (Gutenberg) extensions was stored in the
Calypso repository:

https://github.com/Automattic/wp-calypso

Move the source into this repository.

class.jetpack-gutenberg.php

@@ -583,6 +583,7 @@ public static function enqueue_block_editor_assets() {
 				'wp-edit-post',
 				'wp-editor',
 				'wp-element',
+				'wp-escape-html',
 				'wp-hooks',
 				'wp-i18n',
 				'wp-keycodes',

extensions/README.md

@@ -1,40 +1,38 @@
 # Jetpack Block Editor Extensions
 
-This directory lists extensions for the Block Editor, also known as Gutenberg, [that was introduced in WordPress 5.0](https://wordpress.org/news/2018/12/bebo/).
+This directory lists extensions for the Block Editor, also known as Gutenberg,
+[that was introduced in WordPress 5.0](https://wordpress.org/news/2018/12/bebo/).
 
 ## Extension Type
 
 We define different types of block editor extensions:
 
-- Blocks are available in the editor itself, and live in the `blocks` directory.
-- Plugins are available in the Jetpack sidebar that appears on the right side of the block editor. Those live in the `plugins` directory.
-
-When adding a new extension, add a new directory for your extension the matching directory.
+- Blocks are available in the editor itself.
+- Plugins are available in the Jetpack sidebar that appears on the right side of the block editor.
 
 ## Extension Structure
 
-Your extension should follow this structure:
+Extensions loosely follow this structure:
 
 ```
 .
-└── blockname/
-	└── blockname.php ← PHP file where the block and its assets are registered.
+└── block-or-plugin-name/
+	├── block-or-plugin-name.php ← PHP file where the block and its assets are registered.
+	├── editor.js                ← script loaded only in the editor
+	├── editor.scss              ← styles loaded only in the editor
+	├── view.js                  ← script loaded in the editor and theme
+	└── view.scss                ← styles loaded in the editor and theme
 ```
 
 If your block depends on another block, place them all in extensions folder:
 
 ```
 .
-├── blockname/
+├── block-name/
 └── sub-blockname/
 ```
 
-**Note that this directory is still being populated. For now, you can find the blocks [here](https://github.com/Automattic/wp-calypso/tree/master/client/gutenberg/extensions).
-
 ## Develop new blocks
 
-You can follow [the instructions here](../docs/guides/gutenberg-blocks.md) to add your own block to Jetpack.
-
-## Block naming conventions
+Coming when [#11640](https://github.com/Automattic/jetpack/pull/11640) lands.
 
-Blocks should use the `jetpack/` prefix, e.g. `jetpack/markdown`.

extensions/blocks/business-hours/components/day-edit.js

@@ -0,0 +1,200 @@
+/**
+ * External dependencies
+ */
+import { isEmpty } from 'lodash';
+import { Component, Fragment } from '@wordpress/element';
+import { IconButton, TextControl, ToggleControl } from '@wordpress/components';
+import classNames from 'classnames';
+
+/**
+ * Internal dependencies
+ */
+import { __ } from '../../../utils/i18n';
+
+const defaultOpen = '09:00';
+const defaultClose = '17:00';
+
+class DayEdit extends Component {
+	renderInterval = ( interval, intervalIndex ) => {
+		const { day } = this.props;
+		const { opening, closing } = interval;
+		return (
+			<Fragment key={ intervalIndex }>
+				<div className="business-hours__row">
+					<div className={ classNames( day.name, 'business-hours__day' ) }>
+						{ intervalIndex === 0 && this.renderDayToggle() }
+					</div>
+					<div className={ classNames( day.name, 'business-hours__hours' ) }>
+						<TextControl
+							type="time"
+							label={ __( 'Opening' ) }
+							value={ opening }
+							className="business-hours__open"
+							placeholder={ defaultOpen }
+							onChange={ value => {
+								this.setHour( value, 'opening', intervalIndex );
+							} }
+						/>
+						<TextControl
+							type="time"
+							label={ __( 'Closing' ) }
+							value={ closing }
+							className="business-hours__close"
+							placeholder={ defaultClose }
+							onChange={ value => {
+								this.setHour( value, 'closing', intervalIndex );
+							} }
+						/>
+					</div>
+					<div className="business-hours__remove">
+						{ day.hours.length > 1 && (
+							<IconButton
+								isSmall
+								isLink
+								icon="trash"
+								onClick={ () => {
+									this.removeInterval( intervalIndex );
+								} }
+							/>
+						) }
+					</div>
+				</div>
+				{ intervalIndex === day.hours.length - 1 && (
+					<div className="business-hours__row business-hours-row__add">
+						<div className={ classNames( day.name, 'business-hours__day' ) }>&nbsp;</div>
+						<div className={ classNames( day.name, 'business-hours__hours' ) }>
+							<IconButton isLink label={ __( 'Add Hours' ) } onClick={ this.addInterval }>
+								{ __( 'Add Hours' ) }
+							</IconButton>
+						</div>
+						<div className="business-hours__remove">&nbsp;</div>
+					</div>
+				) }
+			</Fragment>
+		);
+	};
+
+	setHour = ( hourValue, hourType, hourIndex ) => {
+		const { day, attributes, setAttributes } = this.props;
+		const { days } = attributes;
+		setAttributes( {
+			days: days.map( value => {
+				if ( value.name === day.name ) {
+					return {
+						...value,
+						hours: value.hours.map( ( hour, index ) => {
+							if ( index === hourIndex ) {
+								return {
+									...hour,
+									[ hourType ]: hourValue,
+								};
+							}
+							return hour;
+						} ),
+					};
+				}
+				return value;
+			} ),
+		} );
+	};
+
+	toggleClosed = nextValue => {
+		const { day, attributes, setAttributes } = this.props;
+		const { days } = attributes;
+
+		setAttributes( {
+			days: days.map( value => {
+				if ( value.name === day.name ) {
+					const hours = nextValue
+						? [
+								{
+									opening: defaultOpen,
+									closing: defaultClose,
+								},
+						  ]
+						: [];
+					return {
+						...value,
+						hours,
+					};
+				}
+				return value;
+			} ),
+		} );
+	};
+
+	addInterval = () => {
+		const { day, attributes, setAttributes } = this.props;
+		const { days } = attributes;
+		day.hours.push( { opening: '', closing: '' } );
+		setAttributes( {
+			days: days.map( value => {
+				if ( value.name === day.name ) {
+					return {
+						...value,
+						hours: day.hours,
+					};
+				}
+				return value;
+			} ),
+		} );
+	};
+
+	removeInterval = hourIndex => {
+		const { day, attributes, setAttributes } = this.props;
+		const { days } = attributes;
+
+		setAttributes( {
+			days: days.map( value => {
+				if ( day.name === value.name ) {
+					return {
+						...value,
+						hours: value.hours.filter( ( hour, index ) => {
+							return hourIndex !== index;
+						} ),
+					};
+				}
+				return value;
+			} ),
+		} );
+	};
+
+	isClosed() {
+		const { day } = this.props;
+		return isEmpty( day.hours );
+	}
+
+	renderDayToggle() {
+		const { day, localization } = this.props;
+		return (
+			<Fragment>
+				<span className="business-hours__day-name">{ localization.days[ day.name ] }</span>
+				<ToggleControl
+					label={ this.isClosed() ? __( 'Closed' ) : __( 'Open' ) }
+					checked={ ! this.isClosed() }
+					onChange={ this.toggleClosed }
+				/>
+			</Fragment>
+		);
+	}
+
+	renderClosed() {
+		const { day } = this.props;
+		return (
+			<div className="business-hours__row business-hours-row__closed">
+				<div className={ classNames( day.name, 'business-hours__day' ) }>
+					{ this.renderDayToggle() }
+				</div>
+				<div className={ classNames( day.name, 'closed', 'business-hours__hours' ) }>&nbsp;</div>
+				<div className="business-hours__remove">&nbsp;</div>
+			</div>
+		);
+	}
+
+	render() {
+		const { day } = this.props;
+		return this.isClosed() ? this.renderClosed() : day.hours.map( this.renderInterval );
+	}
+}
+
+export default DayEdit;

extensions/blocks/business-hours/components/day-preview.js

@@ -0,0 +1,58 @@
+/**
+ * External dependencies
+ */
+import { Component, Fragment } from '@wordpress/element';
+import { date } from '@wordpress/date';
+import { isEmpty } from 'lodash';
+import { sprintf } from '@wordpress/i18n';
+
+/**
+ * Internal dependencies
+ */
+import { _x } from '../../../utils/i18n';
+
+class DayPreview extends Component {
+	formatTime( time ) {
+		const { timeFormat } = this.props;
+		const [ hours, minutes ] = time.split( ':' );
+		const _date = new Date();
+		if ( ! hours || ! minutes ) {
+			return false;
+		}
+		_date.setHours( hours );
+		_date.setMinutes( minutes );
+		return date( timeFormat, _date );
+	}
+
+	renderInterval = ( interval, key ) => {
+		return (
+			<dd key={ key }>
+				{ sprintf(
+					_x( 'From %s to %s', 'from business opening hour to closing hour' ),
+					this.formatTime( interval.opening ),
+					this.formatTime( interval.closing )
+				) }
+			</dd>
+		);
+	};
+
+	render() {
+		const { day, localization } = this.props;
+		const hours = day.hours.filter(
+			// remove any malformed or empty intervals
+			interval => this.formatTime( interval.opening ) && this.formatTime( interval.closing )
+		);
+		return (
+			<Fragment>
+				<dt className={ day.name }>{ localization.days[ day.name ] }</dt>
+				{ isEmpty( hours ) ? (
+					<dd>{ _x( 'Closed', 'business is closed on a full day' ) }</dd>
+				) : (
+					hours.map( this.renderInterval )
+				) }
+			</Fragment>
+		);
+	}
+}
+
+export default DayPreview;