gutenberg-ad-experiments.js

const { subscribe } = wp.data;
const { createBlock } = wp.blocks;

const createAdBlock = () => createBlock( AdBlock.name, { size: 'mpu' } );

subscribe( e => {
	const {
		getBlocks,
	} = wp.data.select( 'core/editor' );

	const {
		insertBlock,
		moveBlockToPosition,
	} = wp.data.dispatch( 'core/editor' );

	const blocks = getBlocks();

	const firstAdIndex = blocks.findIndex( b => b.name === AdBlock.name );
	const targetIndex = 3;
	const targetRange = 5;

	if ( blocks.length >= targetIndex ) {
		if ( firstAdIndex < 0 ) {
			insertBlock( createAdBlock(), targetIndex );
			return;
		} else if ( firstAdIndex < targetIndex ) {
			moveBlockToPosition( blocks[ firstAdIndex ].clientId, '', '', targetIndex );
			return;
		} else if ( firstAdIndex > ( targetIndex + targetRange ) ) {
			moveBlockToPosition( blocks[ firstAdIndex ].clientId, '', '', targetIndex + targetRange );
			return;
		}
	}

	const secondAdIndex = blocks.findIndex( ( b, i ) => b.name === AdBlock.name && i !== firstAdIndex );
	const secondTargetIndex = 8 + 1 + ( firstAdIndex - targetIndex );

	if ( blocks.length >= secondTargetIndex ) {
		if ( secondAdIndex < 0 ) {
			console.log( 'inserting ad' );
			insertBlock( createAdBlock(), secondTargetIndex );
			return;
		} else if ( secondAdIndex < secondTargetIndex ) {
			console.log( 'moving ad to start', {
				firstAdIndex,
				secondTargetIndex,
			} );
			moveBlockToPosition( blocks[ secondAdIndex ].clientId, '', '', secondTargetIndex );
			return;
		} else if ( secondAdIndex > ( secondTargetIndex + targetRange ) ) {
			console.log( 'moving ad to end', {
				firstAdIndex,
				targetIndex,
				secondAdIndex,
				secondTargetIndex,
				targetRange,
			} );
			moveBlockToPosition( blocks[ secondAdIndex ].clientId, '', '', secondTargetIndex + targetRange );
			return;
		}
	}
} );