leoloso

<p>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.</p>
<p>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.</p>
<p>The plugin makes the following REST API endpoints available:</p>
<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>
<p>Demonstration:</p>
<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>
<p>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.</p>
<p>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.</p>
<p>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><p></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):</p>
<pre><code><p class="align-center">Hello world!</p>
</code></pre>
<p>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:</p>
<pre><code>{
  content: "Hello world!",
  placement: "center",
  type: "paragraph"
}
</code></pre>
<p>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.</p>
<h4>Supported Gutenberg blocks</h4>
<p>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).</p>
<p>The following WordPress core blocks are currently not supported:</p>
<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>
<p>The following Gutenberg blocks are supported, and this plugin extracts their metadata:</p>
<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>
<p>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($block_data)</code> from class <code>Metadata</code> in file <code>block-metadata/src/Metadata.php</code>). The attributes that must be extracted must be decided on a block type by block type basis:</p>
<pre><code>add_filter("Leoloso\BlockMetadata\Metadata::blockMeta", "extract_additional_block_metadata", 10, 3);
function extract_additional_block_metadata($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>
<p>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.</p>
<p><em>Banner image <a href="https://www.freepik.com" rel="nofollow ugc">designed by Freepik</a></em></p>


Block Metadata

Extract all metadata from all Gutenberg blocks inside of a post

Jeff Starr

<blockquote>
<p>✨ Add meta tags to your site<br />
  ✨ Blazing fast performance<br />
  ✨ Uses only 60KB of code!</p>
</blockquote>
<p>Head Meta Data (HMD) improves the definition and semantic quality of your website by adding <code><meta></code> tags to the <code><head></code> section of your web pages. Super lightweight, fast, and user-friendly.</p>
<h3>🤖 Default Meta Tags</h3>
<p>Customize the perfect set of meta tags for your site. For example:</p>
<pre><code><head>

    <meta charset="utf-8">
    <meta name="abstract" content="Obsessive Web Development">
    <meta name="author" content="Jeff Starr (aka Perishable)">
    <meta name="classification" content="Website Development">
    <meta name="copyright" content="Copyright Perishable Press">
    <meta name="description" content="Web Development Tutorials">
    <meta name="designer" content="Jeff Starr @ Monzilla Media">
    <meta name="distribution" content="Global">
    <meta name="keywords" content="Web, WordPress, Tutorials">
    <meta name="language" content="en">
    <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="Web Dev + WordPress + Security">
    <meta name="template" content="shapeSpace WordPress Theme">
    <meta name="robots" content="index,follow">

    

</head>
</code></pre>
<h3>🤖 Dynamic Meta Tags</h3>
<p>Use shortcodes to dynamically output SEO meta tags:</p>
<pre><code><title>[hmd_post_title] | My Awesome Website</title>
<meta name="description" content="[hmd_post_excerpt]">
</code></pre>
<p>This outputs dynamic titles and descriptions, useful for SEO. You also can add unique meta tags and markup on specific posts and pages. Check out the <a href="https://wordpress.org/plugins/head-meta-data/#installation" rel="ugc">Installation tab</a> for more information.</p>
<blockquote>
<p>✨ Help bots understand your content better</p>
</blockquote>
<h3>🤖 Features</h3>
<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>Add custom meta tags on any post or page</li>
<li>Supports X (Twitter) Cards and Facebook Open Graph tags</li>
<li>Supports <code><meta></code>, <code><link></code>, <code><base></code>, <code><title></code>, and <code><style></code></li>
<li>Automatically adds tags to the <code><head></code> section of all pages</li>
<li>Check out a Live Preview of your meta tags and custom tags</li>
<li>Auto-populates tags using your site’s information</li>
<li>Use shortcodes to include dynamic information</li>
<li>Easily disable any unwanted tags</li>
<li>Lightweight, fast, and secure</li>
</ul>
<blockquote>
<p>✨ Check out <a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro</a> to define tags for each page view</p>
</blockquote>
<h3>🤖 Shortcodes</h3>
<p>Shortcodes enable you to include dynamic bits of information in your meta tags. Head Meta Data provides the following shortcodes:</p>
<pre><code>[hmd_post_excerpt]  Outputs post excerpt
[hmd_post_date]     Outputs post date
[hmd_post_author]   Outputs post author
[hmd_post_title]    Outputs post title
[hmd_post_cats]     Outputs post categories
[hmd_post_tags]     Outputs post tags
[hmd_site_tagline]  Outputs site tagline
[hmd_site_title]    Outputs site title
[hmd_year]          Outputs current year
[hmd_tab]           Outputs tab space to tag markup
</code></pre>
<p>So you can display your own set of custom meta tags exactly as desired. <a href="https://wordpress.org/plugins/head-meta-data/#installation" rel="ugc">Learn more »</a></p>
<h3>🤖 Pro Features</h3>
<p>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:</p>
<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>
<p>✨ Level up your meta tags with <a href="https://plugin-planet.com/head-meta-pro/" rel="nofollow ugc">Head Meta Pro »</a></p>
</blockquote>
<h3>🤖 Privacy</h3>
<p>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.</p>
<p>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>.</p>
<h3>🤖 Support Development</h3>
<p>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:</p>
<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>
<p>And/or purchase one of my premium WordPress plugins:</p>
<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>
<p>Links, tweets and likes also appreciated. Thanks! 🙂</p>

Head Meta Data

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

Block Metadata vs Head Meta Data