gatsby-wordpress-gutenberg

Gutenberg Blocks plugin for gatsby-plugin-wordpress

This is an experimental plugin (I.e. not production-ready 😏) that takes blocks from Gutenberg, and transforms them to an array of blocks that tell you the block type, and the inside content (in most cases without the html).

Installation

This plugin works in conjunction with gatsby-plugin-wordpress, so you will need to add and configure that first. You will then need to add the below code to your Wordpress themes functions.php:

add_action(
	'rest_api_init',
	function () {
		if ( ! function_exists( 'use_block_editor_for_post_type' ) ) {
			require ABSPATH . 'wp-admin/includes/post.php';
		}

		// Surface all Gutenberg blocks in the WordPress REST API
		$post_types = get_post_types_by_support( [ 'editor' ] );
		foreach ( $post_types as $post_type ) {
			if ( use_block_editor_for_post_type( $post_type ) ) {
				register_rest_field(
					$post_type,
					'blocks',
					[
						'get_callback' => function ( array $post ) {
							return parse_blocks( $post['content']['raw'] );
						},
					]
				);
			}
		}
	}
);

Now you can add this plugin.

gatsby-config.js

...
{
  resolve: `gatsby-wordpress-gutenberg`,
  options: {
    baseUrl: <url>, // Your Wordpress URL, without the protocol - required
    https: true, // optional, default: true
    includedTypes: ['wordpress__POST', 'wordpress__PAGE'], // Nodes that contain Gutenberg blocks to transform - optional
    excludedBlocks: [], // Blocks to exclude - optional
  }
},
...

Usage

For each type that you chose to transform, a fields/blocks field will appear, which is a union field - here you can select blocks to query. Your data will then contain an array of objects, containing the fields you selected, in the order created in the post/page etc. You can create components for each type, and use that component within a loop if it matches the current type. For example:

const ParagraphBlock = ({ html }) => (<div className="content" dangerouslySetInnerHTML={html} />)
...
return (
  <Layout>
    {data.wordpressPost.fields.blocks.map(block => (
      <div key={block.id}>
        {block.type === 'Paragraph' && <ParagraphBlock html={block.content.html} />}
        {block.type === 'Image' && <Img fluid={block.content.image.localFile.childImageSharp.fluid} alt={block.content.image.altText} />}
        ...etc
      </div>
    ))
  </Layout>
)
...

Try visiting the Graphiql explorer to see how this works - some examples are below.

Examples

Paragraph

query Posts {
  allWordpressPost {
    nodes {
      fields {
        blocks {
          ... on GutenbergBlockParagraph {
            id
            type
            content {
              html
            }
          }
        }
      }
    }
  }
}

Heading

query Posts {
  allWordpressPost {
    nodes {
      fields {
        blocks {
          ... on GutenbergBlockHeading {
            id
            type
            content {
              text
              size
            }
          }
        }
      }
    }
  }
}

Images

Images are downloaded and processed using gatsby-source-filesystem. Each image field will have a localFile object inside it.

query Posts {
  allWordpressPost {
    nodes {
      fields {
        blocks {
          ... on GutenbergBlockImage {
            id
            type
            content {
              image {
                title
                altText
                caption
                localFile {
                  childImageSharp {
                    fluid {
                      ...GatsbyImageSharpFluid
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

And other media types such as Gallery, Audio, Video, File, and MediaText also have this.