leoloso

This plugin helps convert WordPress into a manager of our digital content, to publish it in different mediums or platforms: not just the website, but also email, iOS/Android apps, home-assistants (like Amazon Alexa) and others.
It does this by extracting the metadata from all Gutenberg blocks inside of a blog post. Because each Gutenberg block stores its own content and properties, these ones can be extracted as metadata and exported through a JSON object, accessible through a REST API endpoint, to feed any application on any platform.
The plugin makes the following REST API endpoints available:
<ul>
<li>/wp-json/block-metadata/v1/metadata/{POST_ID}: Extract all metadata from all Gutenberg blocks in a blog post with id {POST_ID}, converted to medium-agnostic (eg: removing all non-semantic HTML tags)</li>
<li>/wp-json/block-metadata/v1/data/{POST_ID}: Extract all data from all Gutenberg blocks in a blog post with id {POST_ID}, as originally stored in the block by Gutenberg (eg: containing HTML code)</li>
</ul>
Demonstration:
<ul>
<li><a href="https://nextapi.getpop.org/posts/cope-with-wordpress-post-demo-containing-plenty-of-blocks/" rel="nofollow ugc">Blog post</a></li>
<li><a href="https://nextapi.getpop.org/wp-json/block-metadata/v1/data/1499" rel="nofollow ugc">Blog post’s Gutenberg blocks</a></li>
<li><a href="https://nextapi.getpop.org/wp-json/block-metadata/v1/metadata/1499" rel="nofollow ugc">Blog post’s medium-agnostic metadata</a></li>
</ul>
<h4>How does it work?</h4>
This plugin is based on the strategy called “Create Once, Publish Everywhere” (also called “COPE”), which reduces the amount of work needed to publish our content into different mediums by establishing a single source of truth for all content.
Having content that works everywhere is not a trivial task, since each medium will have its own requirements. For instance, whereas HTML is valid for printing content for the web, this language is not valid for an iOS/Android app; similarly, we can add classes to our HTML for the web, but these must be converted to styles for email.
The solution is to separate form from content: The presentation and the meaning of the content must be decoupled, and only the meaning is used as the single source of truth. The presentation can then be added in another layer, specific to the selected medium. For instance, given the following piece of HTML code, the <code></code> is an HTML tag which applies mostly for the web, and attribute class=”align-center” is presentation (placing an element “on the center” makes sense for a screen-based medium, but not for an audio-based one such as Amazon Alexa):
<pre><code>Hello world!
</code></pre>
Hence, this piece of content cannot be used as a single source of truth, and it must be converted into a format which separates the meaning from the presentation, such as the following piece of JSON code:
<pre><code>{
 content: "Hello world!",
 placement: "center",
 type: "paragraph"
}
</code></pre>
This piece of code can be used as a single source of truth for content, since from it we can recreate once again the HTML code to use for the web, and procure an appropriate format for other mediums.
<h4>Supported Gutenberg blocks</h4>
This plugin attempts to extract the metadata for all Gutenberg blocks shipped in WordPress core; support for additional blocks, such as from plugins, can be added through hooks. Not all Gutenberg blocks can be supported (for instance, because they may only work for the web, or only make sense when applied to screen-based mediums, among other reasons).
The following WordPress core blocks are currently not supported:
<ul>
<li><code>"core/columns"</code></li>
<li><code>"core/column"</code></li>
<li><code>"core/cover"</code></li>
<li><code>"core/html"</code></li>
<li><code>"core/table"</code></li>
<li><code>"core/button"</code></li>
<li><code>"core/media-text"</code></li>
</ul>
The following Gutenberg blocks are supported, and this plugin extracts their metadata:
<ul>
<li><code>"core/paragraph"</code></li>
<li><code>"core/image"</code></li>
<li><code>"core-embed/youtube"</code> (all other <code>"core-embed"</code> blocks can also be extracted, but must be implemented through a hook)</li>
<li><code>"core/heading"</code></li>
<li><code>"core/gallery"</code></li>
<li><code>"core/list"</code></li>
<li><code>"core/audio"</code></li>
<li><code>"core/file"</code></li>
<li><code>"core/video"</code></li>
<li><code>"core/code"</code></li>
<li><code>"core/preformatted"</code></li>
<li><code>"core/quote"</code></li>
<li><code>"core/pullquote"</code></li>
<li><code>"core/verse"</code></li>
</ul>
<h4>Extracting metadata for additional blocks</h4>
We can extend this plugin to extract the metadata for additional blocks, such as those shipped through plugins. To do this, simply add a hook for filter <code>"Leoloso\BlockMetadata\Metadata::blockMeta"</code> (located in function <code>get_block_metadata($block_data)</code> from class <code>Metadata</code> in file <code>block-metadata/src/Metadata.php</code>). The attributes that must be extracted must be decided on a block type by block type basis:
<pre><code>add_filter("Leoloso\BlockMetadata\Metadata::blockMeta", "extract_additional_block_metadata", 10, 3);
function extract_additional_block_metadata($blockMeta, $blockName, $block)
{
 if ($blockName == "my-plugin/my-block-name") {
 return array(
 "property1" => $block["property1"],
 "property2" => $block["property2"]
 );
 }

 return $blockMeta;
}
</code></pre>
<h4>Further references</h4>
<ul>
<li><a href="https://leoloso.com/posts/my-1st-wp-plugin/" rel="nofollow ugc">Inspiration for the plugin</a></li>
<li><a href="https://slides.com/leoloso/cope-with-wp" rel="nofollow ugc">Slides from presentation “COPE with WordPress”</a> (from WordCamp Singapore 2019), explaining how the plugin works</li>
</ul>
<h4>Contributing / Reporting issues</h4>
Please head over to the project’s <a href="https://github.com/leoloso/block-metadata" rel="nofollow ugc">GitHub repo</a> for contributing, reporting issues or making suggestions, and others.
Banner image <a href="https://www.freepik.com" rel="nofollow ugc">designed by Freepik</a>

Block Metadata

Extract all metadata from all Gutenberg blocks inside of a post

Jeff Starr

<blockquote>
🤖 The easy way to add meta tags to your site 
 🤖 Performance: light, fast, and user-friendly
</blockquote>
Head Meta Data (HMD) improves the definition and semantic quality of your web pages by adding a custom set of <code><meta></code> tags to the <code><head></code> section of your web pages.
Basic Example
Display any set of custom meta tags for your site:
<pre><code><head>

 <meta charset="utf-8">
 <meta name="abstract" content="Obsessive Web Development">
 <meta name="author" content="Perishable">
 <meta name="classification" content="Website Design">
 <meta name="copyright" content="Copyright Perishable Press - All rights Reserved.">
 <meta name="designer" content="Monzilla Media">
 <meta name="language" content="EN-US">
 <meta name="publisher" content="Perishable Press">
 <meta name="rating" content="General">
 <meta name="resource-type" content="Document">
 <meta name="revisit-after" content="3">
 <meta name="subject" content="WordPress, Web Design, Code & Tutorials">
 <meta name="template" content="Awesome Theme">
 <meta name="robots" content="index,follow">

 

</head>
</code></pre>
SEO Example
Use shortcodes to dynamically output SEO meta tags:
<pre><code><title>[hmd_post_title] | Your Awesome Website</title>
<meta name="description" content="[hmd_post_excerpt]">
</code></pre>
This outputs dynamic titles and descriptions, useful for SEO. You also can add custom meta tags and markup on specific posts and pages. Check out <a href="https://wordpress.org/plugins/head-meta-data/#installation" rel="ugc">Installation</a> for more infos.
Features
<ul>
<li>Simple and easy to use</li>
<li>Clean, standards-based code</li>
<li>Customize all <code><meta></code> tags</li>
<li>Add your own custom <code><meta></code> tags</li>
<li>NEW: Add custom tags on any post or page</li>
<li>Use shortcodes to include dynamic information</li>
<li>Includes meta tags on all of your site’s web pages</li>
<li>Check out a Live Preview of your meta tags and custom tags</li>
<li>Automatically adds tags to the <code><head></code> section of all pages</li>
<li>Auto-populates tags using your site’s information</li>
<li>Choose HTML or XHTML format for meta tags</li>
<li>Supports Twitter Cards and Facebook Open Graph tags</li>
<li>Easily disable any unwanted tags</li>
<li>Option to reset default settings</li>
<li>Works with or without Gutenberg Block Editor</li>
<li>Regularly updated and “future proof”</li>
<li>Lightweight, fast, and secure</li>
</ul>
<blockquote>
🤖 New! Check out <a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta PRO »</a>
</blockquote>
Shortcodes
Shortcodes enable you to include dynamic bits of information in your meta tags. Head Meta Data currently provides the following shortcodes:
<ul>
<li><code>[hmd_post_excerpt]</code> — post excerpt</li>
<li><code>[hmd_post_date]</code> — post date</li>
<li><code>[hmd_post_author]</code> — post author name</li>
<li><code>[hmd_post_title]</code> — post title</li>
<li><code>[hmd_post_cats]</code> — post categories</li>
<li><code>[hmd_post_tags]</code> — post tags</li>
<li><code>[hmd_year]</code> — current year</li>
<li><code>[hmd_tab]</code> — adds tab space to markup</li>
</ul>
So you can display your own set of customized meta tags exactly as desired. See the <a href="https://wordpress.org/plugins/head-meta-data/#installation" rel="ugc">Installation section</a> for more information about the HMD shortcodes!
Pro Version Features
The <a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Pro version</a> can do everything the free version can do, PLUS:
<ul>
<li>Define meta tags for Custom Post Types</li>
<li>Define meta tags for each type of page-view (e.g., home, posts, pages, archive, search)</li>
<li>Define tags for Facebook (Open Graph)</li>
<li>Define tags for X (Twitter)</li>
<li>Define Facebook and X tags for each type of page view</li>
<li>40+ advanced <a href="https://plugin-planet.com/head-meta-pro-shortcut-variables/" rel="nofollow ugc">shortcut variables</a> like <code>%POST_AUTHOR%</code> and <code>%ARCHIVE_TYPE%</code></li>
<li>Dedicated “Meta Tags” meta box for posts and pages</li>
<li>Add custom meta tags to any post or page-view</li>
<li>Add custom script and style to any post or page-view</li>
<li>Meta Tags box integrates with SEO plugins</li>
<li>Additional meta tags beyond the free version</li>
<li>Dedicated setting for <code>image_src</code> link tag</li>
<li>Premium support for pro purchases</li>
</ul>
<blockquote>
🤖 Level up your meta tags with <a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro »</a>
</blockquote>
More Info
Head Meta Data is designed to complete a site’s head construct by including some of the more obscure meta tags, such as “author”, “copyright”, “designer”, and so forth. As a matter of practicality, the more widely used tags such as “description” and “keywords” have been omitted, as they are already included via wide variety of plugins (such as “All in One SEO”) in a more dynamic way. Even so, adding “description”, “keyword”, or any other tags is easy from the plugin’s settings page.
Privacy
This plugin does not collect or store any user data. It does not set any cookies, and it does not connect to any third-party locations. Thus, this plugin does not affect user privacy in any way.
Head Meta Data is developed and maintained by <a href="https://x.com/perishable" rel="nofollow ugc">Jeff Starr</a>, 15-year <a href="https://plugin-planet.com/" rel="nofollow ugc">WordPress developer</a> and <a href="https://books.perishablepress.com/" rel="nofollow ugc">book author</a>.
Support development
I develop and maintain this free plugin with love for the WordPress community. To show support, you can <a href="https://monzillamedia.com/donate.html" rel="nofollow ugc">make a donation</a> or purchase one of my books:
<ul>
<li><a href="https://wp-tao.com/" rel="nofollow ugc">The Tao of WordPress</a></li>
<li><a href="https://digwp.com/" rel="nofollow ugc">Digging into WordPress</a></li>
<li><a href="https://htaccessbook.com/" rel="nofollow ugc">.htaccess made easy</a></li>
<li><a href="https://wp-tao.com/wordpress-themes-book/" rel="nofollow ugc">WordPress Themes In Depth</a></li>
<li><a href="https://books.perishablepress.com/downloads/wizards-collection-sql-recipes-wordpress/" rel="nofollow ugc">Wizard’s SQL Recipes for WordPress</a></li>
</ul>
And/or purchase one of my premium WordPress plugins:
<ul>
<li><a href="https://plugin-planet.com/bbq-pro/" rel="nofollow ugc">BBQ Pro</a> – Blazing fast WordPress firewall</li>
<li><a href="https://plugin-planet.com/blackhole-pro/" rel="nofollow ugc">Blackhole Pro</a> – Automatically block bad bots</li>
<li><a href="https://plugin-planet.com/banhammer-pro/" rel="nofollow ugc">Banhammer Pro</a> – Monitor traffic and ban the bad guys</li>
<li><a href="https://plugin-planet.com/ga-google-analytics-pro/" rel="nofollow ugc">GA Google Analytics Pro</a> – Connect WordPress to Google Analytics</li>
<li><a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro</a> – Ultimate Meta Tags for WordPress</li>
<li><a href="https://plugin-planet.com/simple-ajax-chat-pro/" rel="nofollow ugc">Simple Ajax Chat Pro</a> – Unlimited chat rooms</li>
<li><a href="https://plugin-planet.com/usp-pro/" rel="nofollow ugc">USP Pro</a> – Unlimited front-end forms</li>
</ul>
Links, tweets and likes also appreciated. Thanks! 🙂

Head Meta Data

Adds a custom set of <meta> tags to the <head> section of all posts & pages.

Block Metadata vs Head Meta Data