Merge main into mycalendar-init

2024-10-26 16:33:26 +02:00 · 2024-10-26 16:33:26 +02:00 · 0ac8c8c413
commit 0ac8c8c413
parent fdb4f000a3 c8ea6e4eac
50 changed files with 2513 additions and 89 deletions
--- a/.forgejo/workflows/phpunit.yml
+++ b/.forgejo/workflows/phpunit.yml
@ -37,7 +37,7 @@ jobs:
          path: |
            ${{ env.WP_CORE_DIR }}
            ${{ env.WP_TESTS_DIR }}
-          key: cache-wordpress-4
+          key: cache-wordpress-9

      - name: Cache Composer
        id: cache-composer-phpunit
@ -93,3 +93,18 @@ jobs:
        run: cd /workspace/Event-Federation/wordpress-activitypub-event-bridge/ && ./vendor/bin/phpunit --filter=events_manager
        env:
          PHP_VERSION: ${{ matrix.php-version }}
+
+      - name: Run Integration tests for WP Event Manager
+        run: cd /workspace/Event-Federation/wordpress-activitypub-event-bridge/ && ./vendor/bin/phpunit --filter=wp_event_manager
+        env:
+          PHP_VERSION: ${{ matrix.php-version }}
+
+      - name: Run Integration tests for Eventin (WP Event Solution)
+        run: cd /workspace/Event-Federation/wordpress-activitypub-event-bridge/ && ./vendor/bin/phpunit --filter=eventin
+        env:
+          PHP_VERSION: ${{ matrix.php-version }}
+
+      - name: Run Integration tests for Modern Events Calendar Lite
+        run: cd /workspace/Event-Federation/wordpress-activitypub-event-bridge/ && ./vendor/bin/phpunit --filter=modern_events_calendar_lite
+        env:
+          PHP_VERSION: ${{ matrix.php-version }}
--- a/.wordpress-org/banner-1544x500.jpg
+++ b/.wordpress-org/banner-1544x500.jpg
--- a/.wordpress-org/banner-772x250.jpg
+++ b/.wordpress-org/banner-772x250.jpg
--- a/.wordpress-org/icon-128x128.gif
+++ b/.wordpress-org/icon-128x128.gif
--- a/.wordpress-org/icon-256x256.gif
+++ b/.wordpress-org/icon-256x256.gif
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2024-10-20
+
+### Added
+
+* Initial version tag.
--- a/README.md
+++ b/README.md
@ -39,9 +39,19 @@ These platforms create public event calendars by pulling in events from various
    <img src="./.wordpress-org/decentralized-event-calenders.gif" alt="Logo" width="250" />
 </p>

-Even platforms that don’t yet fully support events, like [Mastodon](https://joinmastodon.org), will still receive a detailed, well-composed summary of your event.
+Even platforms that don't yet fully support events, like [Mastodon](https://joinmastodon.org), will still receive a detailed, well-composed summary of your event.
 The Event Federation plugin ensures that users from those platforms are provided with all important information about an event.

+### Features for Your WordPress Events and the Fediverse
+
+**ActivityPub-Enabled Event Sharing:** Your WordPress events are not part of the Fediverse and
+
+**Automatic Event Summaries:** When your event is shared on the Fediverse, platforms like Mastodon that don't fully support events will display a brief HTML summary of key details — such as the event's title, start time, and location. This ensures that even if someone can't view the full event on their platform, they still get the important info at a glance, with a link to your WordPress event page.
+
+**Improved Event Discoverability:** Your custom event categories are mapped to a set of default categories used in the Fediverse, helping your events reach a wider audience. This improves the chances that users searching for similar events on other platforms will find yours.
+
+**Event Reminders for Your Followers:** Often, events are planned well in advance. To keep your followers informed right in time, you can set up reminders that are supposed to trigger the events showing up in their timelines right before the event starts. At the moment this reminder is implemented as a self-boost of your original event post. While this feature may behave differently across various platforms, we are working on a more robust solution that will let you schedule dedicated reminder notes that appear in all followers' timelines.
+
 ## Installation

 This plugin depends on the [ActivityPub plugin](https://wordpress.org/plugins/activitypub/). Additionally, you need to use one of the supported event plugins. See below.
@ -51,6 +61,10 @@ This plugin depends on the [ActivityPub plugin](https://wordpress.org/plugins/ac
 * [The Events Calendar](https://de.wordpress.org/plugins/the-events-calendar/)
 * [VS Event List](https://de.wordpress.org/plugins/very-simple-event-list/)
 * [Events Manager](https://de.wordpress.org/plugins/events-manager/)
+* [WP Event Manager](https://de.wordpress.org/plugins/wp-event-manager/)
+* [Eventin](https://de.wordpress.org/plugins/wp-event-solution/)
+* [Modern Events Calendar Lite](https://webnus.net/modern-events-calendar/)
+* [GatherPress](https://gatherpress.org/)

 ## Configuration

--- a/activitypub-event-bridge.php
+++ b/activitypub-event-bridge.php
@ -3,7 +3,7 @@
 * Plugin Name:  ActivityPub Event Bridge
 * Description:  Integrating popular event plugins with the ActivityPub plugin.
 * Plugin URI:   https://event-federation.eu/
- * Version:      0.1.0
+ * Version:      0.1.1
 * Author:       André Menrath
 * Author URI:   https://graz.social/@linos
 * Text Domain:  activitypub-event-bridge
@ -11,7 +11,7 @@
 * License URI:  https://www.gnu.org/licenses/agpl-3.0.de.html
 * Requires PHP: 8.1
 *
- * Requires at least ActivityPub plugin with version >= 3.2.2. ActivityPub plugin tested up to: 3.2.2.
+ * Requires at least ActivityPub plugin with version >= 3.2.2. ActivityPub plugin tested up to: 3.3.3.
 *
 * @package ActivityPub_Event_Bridge
 * @license AGPL-3.0-or-later
--- a/assets/css/activitypub-event-bridge-admin.css
+++ b/assets/css/activitypub-event-bridge-admin.css
@ -0,0 +1,179 @@
+.settings_page_activitypub-event-bridge #wpcontent {
+	padding-left: 0;
+}
+
+.activitypub-event-bridge-settings-page .box {
+	border: 1px solid #c3c4c7;
+	background-color: #fff;
+	padding: 1em 1.5em;
+	margin-bottom: 1.5em;
+}
+
+.activitypub-event-bridge-settings-page .box ul.activitypub-event-bridge-list {
+	margin-left: 0.6em;
+}
+
+.activitypub-event-bridge-settings-page .box pre {
+	padding: 1rem;
+	min-height: 200px;
+	box-shadow: none;
+	border-radius: 15px;
+	border: 1px solid #dfe0e2;
+	background-color: #f7f7f7;
+}
+
+.activitypub-event-bridge-settings {
+	max-width: 800px;
+	margin: 0 auto;
+}
+
+.activitypub-event-bridge-settings-header {
+	text-align: center;
+	margin: 0 0 1rem;
+	background: #fff;
+	border-bottom: 1px solid #dcdcde;
+}
+
+.activitypub-event-bridge-settings-title-section {
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	clear: both;
+	padding-top: 8px;
+}
+
+.activitypub-event-bridge-settings-tabs-wrapper {
+	display: -ms-inline-grid;
+	-ms-grid-columns: auto auto auto auto;
+	vertical-align: top;
+	display: inline-grid;
+	grid-template-columns: auto auto auto auto;
+}
+
+.activitypub-event-bridge-settings-tab.active {
+	box-shadow: inset 0 -3px #3582c4;
+	font-weight: 600;
+}
+
+.activitypub-event-bridge-settings-tab {
+	display: block;
+	text-decoration: none;
+	color: inherit;
+	padding: .5rem 1rem 1rem;
+	margin: 0 1rem;
+	transition: box-shadow .5s ease-in-out;
+}
+
+.activitypub-event-bridge-settings .box h3 {
+	font-size: 1.15em;
+	margin-bottom: 0em;
+}
+
+#activitypub_event_bridge_initially_activated {
+	display: hidden;
+}
+
+/* Accordions for admin pages */
+.activitypub-event-bridge-settings-accordion {
+	border: 1px solid #c3c4c7;
+}
+
+.activitypub-event-bridge-settings-accordion-heading {
+	margin: 0;
+	border-top: 1px solid #c3c4c7;
+	font-size: inherit;
+	line-height: inherit;
+	font-weight: 600;
+	color: inherit;
+}
+
+.activitypub-event-bridge-settings-accordion-heading:first-child {
+	border-top: none;
+}
+
+.activitypub-event-bridge-settings-accordion-panel {
+	margin: 0;
+	padding: 1em 1.5em;
+	background: #fff;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger {
+	background: #fff;
+	border: 0;
+	color: #2c3338;
+	cursor: pointer;
+	display: flex;
+	font-weight: 400;
+	margin: 0;
+	padding: 1em 3.5em 1em 1.5em;
+	min-height: 46px;
+	position: relative;
+	text-align: left;
+	width: 100%;
+	align-items: center;
+	justify-content: space-between;
+	-webkit-user-select: auto;
+	user-select: auto;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger {
+	color: #2c3338;
+	cursor: pointer;
+	font-weight: 400;
+	text-align: left;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger .title {
+	pointer-events: none;
+	font-weight: 600;
+	flex-grow: 1;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger .icon,
+.activitypub-event-bridge-settings-accordion-viewed .icon {
+	border: solid #50575e medium;
+	border-width: 0 2px 2px 0;
+	height: .5rem;
+	pointer-events: none;
+	position: absolute;
+	right: 1.5em;
+	top: 50%;
+	transform: translateY(-70%) rotate(45deg);
+	width: .5rem;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger[aria-expanded="true"] .icon {
+	transform: translateY(-30%) rotate(-135deg);
+}
+
+.activitypub-event-bridge-settings-accordion-trigger:active,
+.activitypub-event-bridge-settings-accordion-trigger:hover {
+	background: #f6f7f7;
+}
+
+.activitypub-event-bridge-settings-accordion-trigger:focus {
+	color: #1d2327;
+	border: none;
+	box-shadow: none;
+	outline-offset: -1px;
+	outline: 2px solid #2271b1;
+	background-color: #f6f7f7;
+}
+
+.activitypub-event-bridge-settings-inline-icon {
+	width: 1.5em;
+	height: 1.5em;
+	vertical-align: middle;
+	margin: 0 0.3em;
+}
+
+code.activitypub-event-bridge-settings-example-url {
+	display: block;
+	background: rgb(28, 29, 33);
+	padding: 8px;
+	margin: 10px 0px 10px 0;
+	border-radius: 7px;
+	color: #d5d5d6;
+	overflow-x: auto;
+	word-break: break-all;
+}
--- a/assets/css/activitypub-event-extensions-admin.css
+++ b/assets/css/activitypub-event-extensions-admin.css
@ -1,6 +0,0 @@
-.activitypub-event-bridge-settings-page .box {
-	border: 1px solid #c3c4c7;
-	background-color: #fff;
-	padding: 1em 1.5em;
-	margin-bottom: 1.5em;
-}
--- a/assets/img/activitypub.svg
+++ b/assets/img/activitypub.svg
@ -0,0 +1,288 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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+
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+   inkscape:version="0.92.1 r15371"
+   sodipodi:docname="ActivityPub-logo-symbol.svg">
+  <title
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+    <linearGradient
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+    <linearGradient
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+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title>ActivityPub logo</dc:title>
+        <cc:license
+           rdf:resource="http://creativecommons.org/publicdomain/zero/1.0/" />
+        <dc:date>2017-04-15</dc:date>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Robert Martinez</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:subject>
+          <rdf:Bag>
+            <rdf:li>ActivityPub</rdf:li>
+          </rdf:Bag>
+        </dc:subject>
+      </cc:Work>
+      <cc:License
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+        <cc:permits
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+        <cc:permits
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+        <cc:permits
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--- a/assets/img/fediverse.svg
+++ b/assets/img/fediverse.svg
@ -0,0 +1,17 @@
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+	<path fill="#a730b8" d="M47.9242 72.7966a18.2278 18.2278 0 0 1-7.7959 7.7597l42.7984 42.9653 10.3182-5.2291zm56.4524 56.6704-10.3182 5.2291 21.686 21.7708a18.2278 18.2278 0 0 1 7.7975-7.7608z"/>
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+	<path fill="#ce3d1a" d="M69.5312 91.6539l8.1618 8.1933 29.269-57.1387a18.2278 18.2278 0 0 1-9.787-5.0219zm-7.1897 14.0363-14.0022 27.3353a18.2278 18.2278 0 0 1 9.786 5.0214l12.3775-24.1639z"/>
+	<path fill="#d0188f" d="M39.8906 80.6763a18.2278 18.2278 0 0 1-10.8655 1.7198l8.1762 52.2981a18.2278 18.2278 0 0 1 10.8645-1.7198z"/>
+	<path fill="#5b36e9" d="M63.3259 148.3109a18.2278 18.2278 0 0 1-1.7322 10.8629l52.2893 8.3907a18.2278 18.2278 0 0 1 1.7322-10.8629z"/>
+	<path fill="#30b873" d="M134.9148 146.9182a18.2278 18.2278 0 0 1 9.788 5.0224l24.1345-47.117a18.2278 18.2278 0 0 1-9.7875-5.0229z"/>
+	<path fill="#ebe305" d="M126.1329 33.1603a18.2278 18.2278 0 0 1-7.7975 7.7608l37.3765 37.5207a18.2278 18.2278 0 0 1 7.7969-7.7608z"/>
+	<path fill="#f47601" d="M44.7704 51.6279a18.2278 18.2278 0 0 1 4.9723 9.8123l47.2478-23.9453a18.2278 18.2278 0 0 1-4.9718-9.8113z"/>
+	<path fill="#57c115" d="M118.2491 40.9645a18.2278 18.2278 0 0 1-10.8511 1.8123l4.1853 26.8 11.42 1.8324zm-4.2333 44.1927 9.8955 63.3631a18.2278 18.2278 0 0 1 10.88-1.6278l-9.355-59.9035z"/>
+	<path fill="#dbb210" d="M49.7763 61.6412a18.2278 18.2278 0 0 1-1.694 10.8686l26.8206 4.3077 5.2715-10.2945zm45.9677 7.382-5.272 10.2955 63.3713 10.1777a18.2278 18.2278 0 0 1 1.7606-10.8593z"/>
+	<path fill="#ffca00" d="M93.4385 23.8419a1 1 0 1 0 33.0924 1.8025 1 1 0 1 0-33.0924-1.8025"/>
+	<path fill="#64ff00" d="M155.314 85.957a1 1 0 1 0 33.0923 1.8025 1 1 0 1 0-33.0923-1.8025"/>
+	<path fill="#00a3ff" d="M115.3466 163.9824a1 1 0 1 0 33.0923 1.8025 1 1 0 1 0-33.0923-1.8025"/>
+	<path fill="#9500ff" d="M28.7698 150.0898a1 1 0 1 0 33.0923 1.8025 1 1 0 1 0-33.0923-1.8025"/>
+	<path fill="#ff0000" d="M15.2298 63.4781a1 1 0 1 0 33.0923 1.8025 1 1 0 1 0-33.0923-1.8025"/>
+</svg>
--- a/assets/img/mastodon.svg
+++ b/assets/img/mastodon.svg
@ -0,0 +1,10 @@
+<svg width="75" height="79" viewBox="0 0 75 79" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M73.8393 17.4898C72.6973 9.00165 65.2994 2.31235 56.5296 1.01614C55.05 0.797115 49.4441 0 36.4582 0H36.3612C23.3717 0 20.585 0.797115 19.1054 1.01614C10.5798 2.27644 2.79399 8.28712 0.904997 16.8758C-0.00358524 21.1056 -0.100549 25.7949 0.0682394 30.0965C0.308852 36.2651 0.355538 42.423 0.91577 48.5665C1.30307 52.6474 1.97872 56.6957 2.93763 60.6812C4.73325 68.042 12.0019 74.1676 19.1233 76.6666C26.7478 79.2728 34.9474 79.7055 42.8039 77.9162C43.6682 77.7151 44.5217 77.4817 45.3645 77.216C47.275 76.6092 49.5123 75.9305 51.1571 74.7385C51.1797 74.7217 51.1982 74.7001 51.2112 74.6753C51.2243 74.6504 51.2316 74.6229 51.2325 74.5948V68.6416C51.2321 68.6154 51.2259 68.5896 51.2142 68.5661C51.2025 68.5426 51.1858 68.522 51.1651 68.5058C51.1444 68.4896 51.1204 68.4783 51.0948 68.4726C51.0692 68.4669 51.0426 68.467 51.0171 68.4729C45.9835 69.675 40.8254 70.2777 35.6502 70.2682C26.7439 70.2682 24.3486 66.042 23.6626 64.2826C23.1113 62.762 22.7612 61.1759 22.6212 59.5646C22.6197 59.5375 22.6247 59.5105 22.6357 59.4857C22.6466 59.4609 22.6633 59.4391 22.6843 59.422C22.7053 59.4048 22.73 59.3929 22.7565 59.3871C22.783 59.3813 22.8104 59.3818 22.8367 59.3886C27.7864 60.5826 32.8604 61.1853 37.9522 61.1839C39.1768 61.1839 40.3978 61.1839 41.6224 61.1516C46.7435 61.008 52.1411 60.7459 57.1796 59.7621C57.3053 59.7369 57.431 59.7154 57.5387 59.6831C65.4861 58.157 73.0493 53.3672 73.8178 41.2381C73.8465 40.7606 73.9184 36.2364 73.9184 35.7409C73.9219 34.0569 74.4606 23.7949 73.8393 17.4898Z" fill="url(#paint0_linear_549_34)"/>
+<path d="M61.2484 27.0263V48.114H52.8916V27.6475C52.8916 23.3388 51.096 21.1413 47.4437 21.1413C43.4287 21.1413 41.4177 23.7409 41.4177 28.8755V40.0782H33.1111V28.8755C33.1111 23.7409 31.0965 21.1413 27.0815 21.1413C23.4507 21.1413 21.6371 23.3388 21.6371 27.6475V48.114H13.2839V27.0263C13.2839 22.7176 14.384 19.2946 16.5843 16.7572C18.8539 14.2258 21.8311 12.926 25.5264 12.926C29.8036 12.926 33.0357 14.5705 35.1905 17.8559L37.2698 21.346L39.3527 17.8559C41.5074 14.5705 44.7395 12.926 49.0095 12.926C52.7013 12.926 55.6784 14.2258 57.9553 16.7572C60.1531 19.2922 61.2508 22.7152 61.2484 27.0263Z" fill="white"/>
+<defs>
+<linearGradient id="paint0_linear_549_34" x1="37.0692" y1="0" x2="37.0692" y2="79" gradientUnits="userSpaceOnUse">
+<stop stop-color="#6364FF"/>
+<stop offset="1" stop-color="#563ACC"/>
+</linearGradient>
+</defs>
+</svg>
--- a/assets/img/mobilizon.svg
+++ b/assets/img/mobilizon.svg
--- a/assets/js/activitypub-event-bridge-admin.js
+++ b/assets/js/activitypub-event-bridge-admin.js
@ -0,0 +1,14 @@
+jQuery( function( $ ) {
+	// Accordion handling in various areas.
+	$( '.activitypub-event-bridge-settings-accordion' ).on( 'click', '.activitypub-event-bridge-settings-accordion-trigger', function() {
+		var isExpanded = ( 'true' === $( this ).attr( 'aria-expanded' ) );
+
+		if ( isExpanded ) {
+			$( this ).attr( 'aria-expanded', 'false' );
+			$( '#' + $( this ).attr( 'aria-controls' ) ).attr( 'hidden', true );
+		} else {
+			$( this ).attr( 'aria-expanded', 'true' );
+			$( '#' + $( this ).attr( 'aria-controls' ) ).attr( 'hidden', false );
+		}
+	} );
+} );
--- a/bin/install-wp-tests.sh
+++ b/bin/install-wp-tests.sh
@ -226,6 +226,20 @@ install_wp_plugin() {
    unzip -q -o "$TMPDIR/$PLUGIN_FILE" -d "$WP_CORE_DIR/wp-content/plugins/"
 }

+install_wp_plugin_mec() {
+	mkdir -p "$WP_CORE_DIR/wp-content/plugins/"
+
+	if [ -d "$WP_CORE_DIR/wp-content/plugins/modern-events-calendar-lite" ]; then
+		return;
+	fi
+
+	PLUGIN_VERSION="v7.15.0"
+
+    URL="https://code.event-federation.eu/Event-Federation/modern-events-calendar-lite"
+
+	git clone $URL "$WP_CORE_DIR/wp-content/plugins/modern-events-calendar-lite"
+}
+
 install_wp_plugins() {
 	if [ "$SKIP_PLUGINS_INSTALL" = "true" ]; then
        echo "Skipping WordPress plugin installation."
@ -238,6 +252,10 @@ install_wp_plugins() {
 	install_wp_plugin very-simple-event-list
 	install_wp_plugin gatherpress
 	install_wp_plugin events-manager
+	install_wp_plugin wp-event-manager
+	install_wp_plugin wp-event-solution
+	# Mec is not installable via wordpress.org, we use our own mirror.
+	install_wp_plugin_mec
 }

 install_wp
--- a/composer.json
+++ b/composer.json
@ -1,5 +1,6 @@
 {
    "name": "menrath/wordpress-activitypub-event-bridge",
+    "version": "1.0.0",
    "description": "The ActivityPub Event Bridge help for event custom post types to federate properly.",
    "type": "wordpress-plugin",
    "require": {
@ -50,7 +51,10 @@
            "@test-vs-event-list",
            "@test-the-events-calendar",
            "@test-gatherpress",
-            "@test-events-manager"
+            "@test-events-manager",
+            "@test-wp-event-manager",
+            "@test-eventin",
+            "@test-modern-events-calendar-lite"
        ],
        "test-debug": [
            "@prepare-test",
@ -59,6 +63,10 @@
        "test-vs-event-list": "phpunit --filter=vs_event_list",
        "test-the-events-calendar": "phpunit --filter=the_events_calendar",
        "test-gatherpress": "phpunit --filter=gatherpress",
-        "test-events-manager": "phpunit --filter=events_manager"
+        "test-events-manager": "phpunit --filter=events_manager",
+        "test-wp-event-manager": "phpunit --filter=wp_event_manager",
+        "test-eventin": "phpunit --filter=eventin",
+        "test-modern-events-calendar-lite": "phpunit --filter=modern_events_calendar_lite",
+        "test-all": "phpunit"
    }
 }
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -1,6 +1,9 @@
 version: '3'

 # This files purpose is to run the PHPunit tests locally.
+# Prerequisites:
+# Run "composer install" to generate a composer.lock file and install PHP dev dependencies.
+#
 # Install docker and docker compose and than just run:
 # docker compose up

--- a/docs/add_your_event_plugin.md
+++ b/docs/add_your_event_plugin.md
@ -28,6 +28,15 @@ First you need to add some basic information about your event plugin. Just creat
  final class My_Event_Plugin extends Event_Plugin {
 ```

+Then you need to tell the ActivityPub Event Bridge about that class by adding it to the `EVENT_PLUGIN_CLASSES` constant in the `includes/setup.php` file:
+
+```php
+	private const EVENT_PLUGIN_CLASSES = array(
+		...
+		'\ActivityPub_Event_Bridge\Plugins\My_Event_Plugin',
+	);
+```
+
 The ActivityPub Event Bridge then takes care of applying the transformer, so you can jump right into implementing it.

 ## Writing an event transformer class
@ -107,3 +116,107 @@ In order to ensure your events are compatible with other ActivityPub Event imple
 * **`get_tag`**
 * **`timezone`**
 * **`commentsEnabled`**
+
+## Writing integration tests
+
+Create a new tests class in `tests/test-class-plugin-my-event-plugin.php`.
+
+```
+/**
+ * Sample test case.
+ */
+class Test_My_Event_Plugin extends WP_UnitTestCase {
+```
+
+Implement a check whether your event plugin is active in the `set_up` function. It may be the presence of a class, function or constant.
+
+```php
+	/**
+	 * Override the setup function, so that tests don't run if the Events Calendar is not active.
+	 */
+	public function set_up() {
+		parent::set_up();
+
+		if ( ! <TODO:my-event-plugin-is-active> ) {
+			self::markTestSkipped( 'The Events Calendar plugin is not active.' );
+		}
+
+		// Make sure that ActivityPub support is enabled for The Events Calendar.
+		$aec = \ActivityPub_Event_Bridge\Setup::get_instance();
+		$aec->activate_activitypub_support_for_active_event_plugins();
+
+		// Delete all posts afterwards.
+		_delete_all_posts();
+	}
+```
+
+## Running the tests for your plugin/ add the tests to the CI pipeline
+
+### Install the plugin in the CI
+
+The tests are set up by the bash script in `bin/install-wp-tests.sh`. Make sure your WordPress Event plugin is installed within the function `install_wp_plugins`.
+
+### Add a composer script for your plugin
+
+In the pipeline we want to run each event plugins integration tests in a single command, to achieve that, we use phpunit's filters.
+
+```json
+{
+  "scripts": {
+    ...
+    "test": [
+              ...
+              "@test-my-event-plugin"
+          ],
+          ...
+          "@test-my-event-plugin": "phpunit --filter=my_event_plugin",
+    ]
+  }
+}
+```
+
+### Load your plugin during the tests
+
+To activate/load your plugin add it to the switch statement within the function `_manually_load_plugin()` within `tests/bootstrap.php`.
+
+```php
+	switch ( $activitypub_event_extension_integration_filter ) {
+    ...
+    case 'my_event_plugin':
+			$plugin_file = 'my-event-plugin/my-event-plugin.php';
+			break;
+```
+
+If you want to run your tests locally just change the `test-debug` script in the `composer.json` file:
+
+```json
+    "test-debug": [
+        "@prepare-test",
+        "@test-my-event-plugin"
+    ],
+```
+
+Now you just can execute `docker compose up` to run the tests (make sure you have the latest docker and docker-compose installed).
+
+### Debugging the tests
+
+If you are using Visual Studio Code or VSCodium you can step-debug within the tests by adding this configuration to your `.vscode/launch.json`:
+
+```json
+{
+  "version": "0.2.0",
+  "configurations": [
+    ...,
+    {
+      "name": "Listen for PHPUnit",
+      "type": "php",
+      "request": "launch",
+      "port": 9003,
+      "pathMappings": {
+      "/app/": "${workspaceRoot}/wp-content/plugins/activitypub-event-bridge/",
+      "/tmp/wordpress/": "${workspaceRoot}/"
+      },
+    }
+  ]
+}
+```
--- a/improvements.md
+++ b/improvements.md
@ -0,0 +1,16 @@
+Make use of:
+
+https://docs.theeventscalendar.com/reference/classes/tribe__events__api/get_event_terms/
+
+for getting all tags/terms for an event!
+
+```
+public static function get_event_terms( $event_id, array $args = array() ) {
+    $terms = array();
+    foreach ( get_post_taxonomies( $event_id ) as $taxonomy ) {
+        $tax_terms = wp_get_object_terms( $event_id, $taxonomy, $args );
+        $terms[ $taxonomy ] = $tax_terms;
+    }
+    return $terms;
+}
+```
--- a/includes/activitypub/transformer/class-event.php
+++ b/includes/activitypub/transformer/class-event.php
@ -267,9 +267,9 @@ abstract class Event extends Post {
 		add_filter( 'activitypub_object_content_template', array( self::class, 'remove_ap_permalink_from_template' ), 2, 2 );
 		$excerpt = $this->retrieve_excerpt();
 		// BeforeFirstRelease: decide whether this should be a admin setting.
-		$fallback_to_content = true;
+		$fallback_to_content = false;
 		if ( is_null( $excerpt ) && $fallback_to_content ) {
-			$excerpt = parent::get_content();
+			$excerpt = $this->get_content();
 		}
 		remove_filter( 'activitypub_object_content_template', array( self::class, 'remove_ap_permalink_from_template' ) );

--- a/includes/activitypub/transformer/class-eventin.php
+++ b/includes/activitypub/transformer/class-eventin.php
@ -0,0 +1,164 @@
+<?php
+/**
+ * ActivityPub Transformer for Events managed with Eventin.
+ *
+ * @link https://support.themewinter.com/docs/plugins/docs-category/eventin/
+ *
+ * @package ActivityPub_Event_Bridge
+ * @license AGPL-3.0-or-later
+ */
+
+namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+use Activitypub\Activity\Extended_Object\Place;
+use ActivityPub_Event_Bridge\Activitypub\Transformer\Event;
+use DateTime;
+use DateTimeZone;
+use Etn\Core\Event\Event_Model;
+
+use function Activitypub\esc_hashtag;
+
+/**
+ * ActivityPub Transformer for Events managed with Eventin.
+ *
+ * @since 1.0.0
+ */
+final class Eventin extends Event {
+
+	/**
+	 * Holds the EM_Event object.
+	 *
+	 * @var Event_Model
+	 */
+	protected $event_model;
+
+	/**
+	 * Extend the constructor, to also set the Event Model.
+	 *
+	 * This is a special class object form The Events Calendar which
+	 * has a lot of useful functions, we make use of our getter functions.
+	 *
+	 * @param WP_Post $wp_object The WordPress object.
+	 * @param string  $wp_taxonomy The taxonomy slug of the event post type.
+	 */
+	public function __construct( $wp_object, $wp_taxonomy ) {
+		parent::__construct( $wp_object, $wp_taxonomy );
+		$this->event_model = new Event_Model( $this->wp_object->ID );
+	}
+
+	/**
+	 * Get the end time from the event object.
+	 */
+	public function get_start_time(): string {
+		return \gmdate( 'Y-m-d\TH:i:s\Z', strtotime( $this->event_model->get_start_datetime() ) );
+	}
+
+	/**
+	 * Get the end time from the event object.
+	 */
+	public function get_end_time(): string {
+		return \gmdate( 'Y-m-d\TH:i:s\Z', strtotime( $this->event_model->get_end_datetime() ) );
+	}
+
+	/**
+	 * Get the timezone of the event.
+	 */
+	public function get_timezone(): string {
+		return $this->event_model->get_timezone();
+	}
+
+	/**
+	 * Get whether the event is online.
+	 *
+	 * @return bool
+	 */
+	public function get_is_online(): bool {
+		return 'online' === $this->event_model->__get( 'event_type' ) ? true : false;
+	}
+
+	/**
+	 * Maybe add online link to attachments.
+	 *
+	 * @return array
+	 */
+	public function get_attachment(): array {
+		$attachment = parent::get_attachment();
+
+		$location = (array) $this->event_model->__get( 'location' );
+		if ( array_key_exists( 'integration', $location ) && array_key_exists( $location['integration'], $location ) ) {
+			$online_link  = array(
+				'type'      => 'Link',
+				'mediaType' => 'text/html',
+				'name'      => $location[ $location['integration'] ],
+				'href'      => $location[ $location['integration'] ],
+			);
+			$attachment[] = $online_link;
+		}
+		return $attachment;
+	}
+
+	/**
+	 * Compose the events tags.
+	 */
+	public function get_tag() {
+		// The parent tag function also fetches the mentions.
+		$tags = parent::get_tag();
+
+		$post_tags       = \wp_get_post_terms( $this->wp_object->ID, 'etn_tags' );
+		$post_categories = \wp_get_post_terms( $this->wp_object->ID, 'etn_category' );
+
+		if ( ! is_wp_error( $post_tags ) && $post_tags ) {
+			foreach ( $post_tags as $term ) {
+				$tag    = array(
+					'type' => 'Hashtag',
+					'href' => \esc_url( \get_tag_link( $term->term_id ) ),
+					'name' => esc_hashtag( $term->name ),
+				);
+				$tags[] = $tag;
+			}
+		}
+
+		if ( ! is_wp_error( $post_categories ) && $post_categories ) {
+			foreach ( $post_categories as $term ) {
+				$tag    = array(
+					'type' => 'Hashtag',
+					'href' => \esc_url( \get_tag_link( $term->term_id ) ),
+					'name' => esc_hashtag( $term->name ),
+				);
+				$tags[] = $tag;
+			}
+		}
+
+		if ( empty( $tags ) ) {
+			return null;
+		}
+
+		return $tags;
+	}
+
+	/**
+	 * Get the location.
+	 *
+	 * @return ?Place
+	 */
+	public function get_location(): ?Place {
+		$location = (array) $this->event_model->__get( 'location' );
+
+		if ( ! array_key_exists( 'address', $location ) ) {
+			return null;
+		}
+
+		$place = new Place();
+
+		$address = $location['address'];
+
+		$place->set_name( $address );
+		$place->set_address( $address );
+		$place->set_sensitive( null );
+
+		return $place;
+	}
+}
--- a/includes/activitypub/transformer/class-events-manager.php
+++ b/includes/activitypub/transformer/class-events-manager.php
@ -11,7 +11,6 @@ namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
 // Exit if accessed directly.
 defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

-use Activitypub\Activity\Extended_Object\Event;
 use Activitypub\Activity\Extended_Object\Place;
 use ActivityPub_Event_Bridge\Activitypub\Transformer\Event as Event_Transformer;
 use DateTime;
--- a/includes/activitypub/transformer/class-gatherpress.php
+++ b/includes/activitypub/transformer/class-gatherpress.php
@ -13,7 +13,6 @@ defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

 use Activitypub\Activity\Extended_Object\Event as Event_Object;
 use Activitypub\Activity\Extended_Object\Place;
-use Activitypub\Model\Blog;
 use ActivityPub_Event_Bridge\Activitypub\Transformer\Event;
 use GatherPress\Core\Event as GatherPress_Event;

@ -125,7 +124,7 @@ final class GatherPress extends Event {
 	 */
 	public static function filter_gatherpress_blocks( $block_content, $block ) {
 		// Check if the block name starts with 'gatherpress'.
-		if ( strpos( $block['blockName'], 'gatherpress/' ) === 0 ) {
+		if ( isset( $block['blockName'] ) && 0 === strpos( $block['blockName'], 'gatherpress/' ) ) {
 			return ''; // Skip rendering this block.
 		}

--- a/includes/activitypub/transformer/class-modern-events-calendar-lite.php
+++ b/includes/activitypub/transformer/class-modern-events-calendar-lite.php
@ -0,0 +1,122 @@
+<?php
+/**
+ * ActivityPub Tribe Transformer
+ *
+ * @package ActivityPub_Event_Bridge
+ * @license AGPL-3.0-or-later
+ */
+
+namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+use Activitypub\Activity\Extended_Object\Place;
+use ActivityPub_Event_Bridge\Activitypub\Transformer\Event;
+
+use MEC;
+use MEC\Events\Event as MEC_Event;
+use MEC_main;
+
+/**
+ * ActivityPub Tribe Transformer
+ *
+ * @since 1.0.0
+ */
+final class Modern_Events_Calendar_Lite extends Event {
+	/**
+	 * The MEC Event object.
+	 *
+	 * @var MEC_Event|null
+	 */
+	protected $mec_event;
+
+	/**
+	 * The MEC main instance.
+	 *
+	 * @var MEC_main|null
+	 */
+	protected $mec_main;
+
+
+	/**
+	 * Extend the constructor, to also set the tribe object.
+	 *
+	 * This is a special class object form The Events Calendar which
+	 * has a lot of useful functions, we make use of our getter functions.
+	 *
+	 * @param WP_Post $wp_object The WordPress object.
+	 * @param string  $wp_taxonomy The taxonomy slug of the event post type.
+	 */
+	public function __construct( $wp_object, $wp_taxonomy ) {
+		parent::__construct( $wp_object, $wp_taxonomy );
+		$this->mec_main  = MEC::getInstance( 'app.libraries.main' );
+		$this->mec_event = new MEC_Event( $wp_object );
+	}
+
+	/**
+	 * Retrieves the content without the plugins rendered shortcodes.
+	 */
+	public function get_content(): string {
+		$content = wpautop( $this->wp_object->post_content );
+		return $content;
+	}
+
+	/**
+	 * Get the end time from the event object.
+	 */
+	public function get_start_time(): string {
+		return \gmdate( 'Y-m-d\TH:i:s\Z', $this->mec_event->get_datetime()['start']['timestamp'] );
+	}
+
+	/**
+	 * Get the end time from the event object.
+	 */
+	public function get_end_time(): ?string {
+		return \gmdate( 'Y-m-d\TH:i:s\Z', $this->mec_event->get_datetime()['end']['timestamp'] );
+	}
+
+	/**
+	 * Get the location.
+	 */
+	public function get_location(): ?Place {
+		$location_id = $this->mec_main->get_master_location_id( $this->mec_event->ID );
+
+		if ( ! $location_id ) {
+			return null;
+		}
+
+		$data = $this->mec_main->get_location_data( $location_id );
+
+		$location = new Place();
+		$location->set_sensitive( null );
+
+		if ( ! empty( $data['address'] ) ) {
+			$location->set_address( $data['address'] );
+		}
+		if ( ! empty( $data['name'] ) ) {
+			$location->set_name( $data['name'] );
+		}
+		if ( ! empty( $data['longitude'] ) ) {
+			$location->set_longitude( $data['longitude'] );
+		}
+		if ( ! empty( $data['latitude'] ) ) {
+			$location->set_latitude( $data['latitude'] );
+		}
+
+		return $location;
+	}
+
+	/**
+	 * Get the location.
+	 */
+	public function get_timezone(): string {
+		$timezone = get_post_meta( $this->wp_object->ID, 'mec_timezone', true );
+
+		if ( 'global' === $timezone ) {
+			return parent::get_timezone();
+		}
+
+		return $timezone;
+	}
+}
--- a/includes/activitypub/transformer/class-the-events-calendar.php
+++ b/includes/activitypub/transformer/class-the-events-calendar.php
@ -11,7 +11,6 @@ namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
 // Exit if accessed directly.
 defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

-use Activitypub\Activity\Extended_Object\Event as Event_Object;
 use Activitypub\Activity\Extended_Object\Place;
 use ActivityPub_Event_Bridge\Activitypub\Transformer\Event;
 use WP_Post;
@ -174,7 +173,7 @@ final class The_Events_Calendar extends Event {
 		} else {
 			$location->set_address( $venue->post_title );
 		}
-		$location->set_id( $venue->permalink );
+		$location->set_id( $venue->ID );
 		$location->set_name( $venue->post_title );

 		return $location;
--- a/includes/activitypub/transformer/class-vs-event-list.php
+++ b/includes/activitypub/transformer/class-vs-event-list.php
@ -11,7 +11,6 @@ namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
 // Exit if accessed directly.
 defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

-use Activitypub\Activity\Extended_Object\Event;
 use Activitypub\Activity\Extended_Object\Place;
 use ActivityPub_Event_Bridge\Activitypub\Transformer\Event as Event_Transformer;

--- a/includes/activitypub/transformer/class-wp-event-manager.php
+++ b/includes/activitypub/transformer/class-wp-event-manager.php
@ -0,0 +1,140 @@
+<?php
+/**
+ * ActivityPub Transformer for the plugin Very Simple Event List.
+ *
+ * @package ActivityPub_Event_Bridge
+ * @license AGPL-3.0-or-later
+ */
+
+namespace ActivityPub_Event_Bridge\Activitypub\Transformer;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+use Activitypub\Activity\Extended_Object\Place;
+use ActivityPub_Event_Bridge\Activitypub\Transformer\Event as Event_Transformer;
+use DateTime;
+
+/**
+ * ActivityPub Transformer for events from the WordPress plugin 'Events Manager'
+ *
+ * @see https://wordpress.org/plugins/events-manager/
+ *
+ * @since 1.0.0
+ */
+final class WP_Event_Manager extends Event_Transformer {
+	/**
+	 * Returns whether the even is online
+	 *
+	 * @return bool
+	 */
+	protected function get_is_online() {
+		$is_online_text = get_post_meta( $this->wp_object->ID, '_event_online', true );
+		$is_online      = false;
+		// Radio buttons.
+		if ( 'yes' === $is_online_text ) {
+			$is_online = true;
+		}
+		// Checkbox.
+		if ( '1' === $is_online_text ) {
+			$is_online = true;
+		}
+		return $is_online;
+	}
+
+	/**
+	 * Get the event location.
+	 *
+	 * @return array The Place.
+	 */
+	public function get_location(): ?Place {
+		$location_name = get_post_meta( $this->wp_object->ID, '_event_location', true );
+
+		if ( $location_name ) {
+			$location = new Place();
+			$location->set_name( $location_name );
+			$location->set_sensitive( null );
+			$location->set_address( $location_name );
+
+			return $location;
+		}
+		return null;
+	}
+
+	/**
+	 * Get the end time from the events metadata.
+	 *
+	 * @return ?string The events end-datetime if is set, null otherwise.
+	 */
+	public function get_end_time(): ?string {
+		$end_date = get_post_meta( $this->wp_object->ID, '_event_end_date', true );
+		if ( $end_date ) {
+			$end_datetime = new DateTime( $end_date );
+			return \gmdate( 'Y-m-d\TH:i:s\Z', $end_datetime->getTimestamp() );
+		}
+		return null;
+	}
+
+	/**
+	 * Get the end time from the events metadata.
+	 */
+	public function get_start_time(): string {
+		$start_date = get_post_meta( $this->wp_object->ID, '_event_start_date', true );
+		if ( ! is_numeric( $start_date ) ) {
+			$start_datetime  = new DateTime( $start_date );
+			$start_timestamp = $start_datetime->getTimestamp();
+		} else {
+			$start_timestamp = (int) $start_date;
+		}
+
+		return \gmdate( 'Y-m-d\TH:i:s\Z', $start_timestamp );
+	}
+
+	/**
+	 * Get the event link as an ActivityPub Link object, but as an associative array.
+	 *
+	 * @return ?array
+	 */
+	private function get_event_link_attachment(): ?array {
+		$event_link_url = get_post_meta( $this->wp_object->ID, '_event_video_url', true );
+
+		if ( str_starts_with( $event_link_url, 'http' ) ) {
+			return array(
+				'type'      => 'Link',
+				'name'      => \esc_html__( 'Video URL', 'activitypub-event-bridge' ),
+				'href'      => \esc_url( $event_link_url ),
+				'mediaType' => 'text/html',
+			);
+		} else {
+			return null;
+		}
+	}
+
+	/**
+	 * Overrides/extends the get_attachments function to also add the event Link.
+	 */
+	protected function get_attachment() {
+		// Get attachments via parent function.
+		$attachments = parent::get_attachment();
+
+		// The first attachment is the featured image, make sure it is compatible with Mobilizon.
+		if ( count( $attachments ) ) {
+			$attachments[0]['type'] = 'Document';
+			$attachments[0]['name'] = 'Banner';
+		}
+
+		if ( $this->get_event_link_attachment() ) {
+			$attachments[] = $this->get_event_link_attachment();
+		}
+		return $attachments;
+	}
+
+	/**
+	 * Get the events title/name.
+	 *
+	 * @return string
+	 */
+	protected function get_name(): string {
+		return $this->wp_object->post_title;
+	}
+}
--- a/includes/admin/class-general-admin-notices.php
+++ b/includes/admin/class-general-admin-notices.php
@ -98,6 +98,24 @@ class General_Admin_Notices {
 		);
 	}

+	/**
+	 * Warning to fix status issues first.
+	 *
+	 * @return string
+	 */
+	public static function get_admin_notice_status_not_ok(): string {
+		return sprintf(
+			/* translators: 1: An URL to the list of supported event plugins. */
+			_x(
+				'The Plugin <i>ActivityPub Event Bridge</i> is of no use, because you do not have installed and activated a supported Event Plugin.
+				<br> For a list of supported Event Plugins see  <a href="%1$s">here</a>.',
+				'admin notice',
+				'activitypub-event-bridge'
+			),
+			esc_html( self::ACTIVITYPUB_EVENT_BRIDGE_SUPPORTED_EVENT_PLUGINS_URL )
+		);
+	}
+
 	/**
 	 * Warning if the plugin is Active and the ActivityPub plugin is not.
 	 *
--- a/includes/admin/class-health-check.php
+++ b/includes/admin/class-health-check.php
@ -0,0 +1,185 @@
+<?php
+/**
+ * Health_Check class.
+ *
+ * @package Activitypub_Event_Bridge
+ */
+
+namespace ActivityPub_Event_Bridge\Admin;
+
+use Activitypub\Transformer\Factory as Transformer_Factory;
+use ActivityPub_Event_Bridge\Plugins\Event_Plugin;
+use ActivityPub_Event_Bridge\Setup;
+use WP_Query;
+
+/**
+ * ActivityPub Health_Check Class.
+ */
+class Health_Check {
+	/**
+	 * Initialize health checks.
+	 */
+	public static function init() {
+		\add_filter( 'site_status_tests', array( self::class, 'add_tests' ) );
+		\add_filter( 'debug_information', array( self::class, 'add_debug_information' ) );
+	}
+
+	/**
+	 * Add tests to the Site Health Check.
+	 *
+	 * @param array $tests The test array.
+	 *
+	 * @return array The filtered test array.
+	 */
+	public static function add_tests( $tests ) {
+		$tests['direct']['activitypub_event_bridge_test'] = array(
+			'label' => __( 'ActivityPub Event Transformer Test', 'activitypub-event-bridge' ),
+			'test'  => array( self::class, 'test_event_transformation' ),
+		);
+
+		return $tests;
+	}
+
+	/**
+	 * The the transformation of the most recent event posts.
+	 *
+	 * @return array
+	 */
+	public static function test_event_transformation() {
+		$result = array(
+			'label'       => \__( 'Transformation of Events to a valid ActivityStreams representation.', 'activitypub' ),
+			'status'      => 'good',
+			'badge'       => array(
+				'label' => \__( 'ActivityPub Event Bridge', 'activitypub-event-bridge' ),
+				'color' => 'green',
+			),
+			'description' => \sprintf(
+				'<p>%s</p>',
+				\__( 'The transformation of your most recent events was successful.', 'activitypub-event-bridge' )
+			),
+			'actions'     => '',
+			'test'        => 'test_event_transformation',
+		);
+
+		$check = self::transform_most_recent_event_posts();
+
+		if ( true === $check ) {
+			return $result;
+		}
+
+		$result['status']         = 'critical';
+		$result['label']          = \__( 'One or more of your most recent events failed to transform to ActivityPub', 'activitypub-event-bridge' );
+		$result['badge']['color'] = 'red';
+		$result['description']    = \sprintf(
+			'<p>%s</p>',
+			$check->get_error_message()
+		);
+
+		return $result;
+	}
+
+	/**
+	 * Test if right transformer gets applied.
+	 *
+	 * @param Event_Plugin $event_plugin  The event plugin definition.
+	 *
+	 * @return bool True if the check passed.
+	 */
+	public static function test_if_event_transformer_is_used( $event_plugin ) {
+		// Get a (random) event post.
+		$event_posts = self::get_most_recent_event_posts( $event_plugin->get_post_type(), 1 );
+
+		// If no post is found, we can not do this test.
+		if ( ! $event_posts || is_wp_error( $event_posts ) || empty( $event_posts ) ) {
+			return true;
+		}
+
+		// Call the transformer Factory.
+		$transformer = Transformer_Factory::get_transformer( $event_posts[0] );
+		// Check that we got the right transformer.
+		$desired_transformer_class = $event_plugin::get_activitypub_event_transformer_class();
+		if ( $transformer instanceof $desired_transformer_class ) {
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Retrieves the most recently published event posts of a certain event post type.
+	 *
+	 * @param ?string $event_post_type  The post type of the events.
+	 * @param ?int    $number_of_posts  The maximum number of events to return.
+	 *
+	 * @return WP_Post[]|false         Array of event posts, or false if none are found.
+	 */
+	public static function get_most_recent_event_posts( $event_post_type = null, $number_of_posts = 5 ) {
+		if ( ! $event_post_type ) {
+			$event_post_type = Setup::get_instance()->get_active_event_plugins()[0]->get_post_type();
+		}
+
+		$args = array(
+			'numberposts'      => $number_of_posts,
+			'category'         => 0,
+			'orderby'          => 'date',
+			'order'            => 'DESC',
+			'include'          => array(),
+			'exclude'          => array(),
+			'meta_key'         => '',
+			'meta_value'       => '',
+			'post_type'        => $event_post_type,
+			'suppress_filters' => true,
+		);
+
+		$query = new WP_Query();
+		return $query->query( $args );
+	}
+
+	/**
+	 * Transform the most recent event posts.
+	 */
+	public static function transform_most_recent_event_posts() {
+		return true;
+	}
+
+	/**
+	 * Retrieves information like name and version from active event plugins.
+	 */
+	private static function get_info_about_active_event_plugins() {
+		$active_event_plugins = Setup::get_instance()->get_active_event_plugins();
+		$info                 = array();
+		foreach ( $active_event_plugins as $active_event_plugin ) {
+			$event_plugin_file    = $active_event_plugin->get_plugin_file();
+			$event_plugin_data    = \get_plugin_data( $event_plugin_file );
+			$event_plugin_name    = isset( $event_plugin_data['Plugin Name'] ) ? $event_plugin_data['Plugin Name'] : 'Name not found';
+			$event_plugin_version = isset( $event_plugin_version['Plugin Version'] ) ? $event_plugin_version['Plugin Version'] : 'Version not found';
+
+			$info[] = array(
+				'event_plugin_name'    => $event_plugin_name,
+				'event_plugin_version' => $event_plugin_version,
+				'event_plugin_file'    => $event_plugin_file,
+			);
+		}
+	}
+
+	/**
+	 * Static function for generating site debug data when required.
+	 *
+	 * @param  array $info  The debug information to be added to the core information page.
+	 * @return array        The extended information.
+	 */
+	public static function add_debug_information( $info ) {
+		$info['activitypub_event_bridge'] = array(
+			'label'  => __( 'ActivityPub Event Bridge', 'activitypub-event-bridge' ),
+			'fields' => array(
+				'plugin_version'       => array(
+					'label'   => __( 'Plugin Version', 'activitypub' ),
+					'value'   => ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_VERSION,
+					'private' => true,
+				),
+				'active_event_plugins' => self::get_info_about_active_event_plugins(),
+			),
+		);
+
+		return $info;
+	}
+}
--- a/includes/admin/class-settings-page.php
+++ b/includes/admin/class-settings-page.php
@ -3,7 +3,7 @@
 * General settings class.
 *
 * This file contains the General class definition, which handles the "General" settings
- * page for the ActivityPub Event Extension Plugin, providing options for configuring various general settings.
+ * page for the Activitypub Event Bridge Plugin, providing options for configuring various general settings.
 *
 * @package ActivityPub_Event_Bridge
 * @since 1.0.0
@ -18,9 +18,9 @@ use ActivityPub_Event_Bridge\Plugins\Event_Plugin;
 use ActivityPub_Event_Bridge\Setup;

 /**
- * Class responsible for the ActivityPub Event Extension related Settings.
+ * Class responsible for the Activitypub Event Bridge related Settings.
 *
- * Class which handles the "General" settings page for the ActivityPub Event Extension Plugin,
+ * Class which handles the "General" settings page for the Activitypub Event Bridge Plugin,
 * providing options for configuring various general settings.
 *
 * @since 1.0.0
@ -36,11 +36,11 @@ class Settings_Page {
 	 */
 	public static function admin_menu(): void {
 		\add_options_page(
-			'Activitypub Event Extension',
-			__( 'ActivityPub Events', 'activitypub-event-bridge' ),
+			'Activitypub Event Bridge',
+			__( 'ActivityPub Event Bridge', 'activitypub-event-bridge' ),
 			'manage_options',
 			self::SETTINGS_SLUG,
-			array( self::STATIC, 'settings_page' )
+			array( self::STATIC, 'settings_page' ),
 		);
 	}

@ -89,6 +89,16 @@ class Settings_Page {
 	 * @return void
 	 */
 	public static function settings_page(): void {
+		// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		if ( empty( $_GET['tab'] ) ) {
+			$tab = 'welcome';
+		} else {
+			// phpcs:ignore WordPress.Security.NonceVerification.Recommended
+			$tab = sanitize_key( $_GET['tab'] );
+		}
+
+		switch ( $tab ) {
+			case 'settings':
 				$plugin_setup = Setup::get_instance();

 				$event_plugins = $plugin_setup->get_active_event_plugins();
@ -105,5 +115,15 @@ class Settings_Page {
 				);

 				\load_template( ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_DIR . 'templates/settings.php', true, $args );
+				break;
+			case 'welcome':
+			default:
+				wp_enqueue_script( 'plugin-install' );
+				add_thickbox();
+				wp_enqueue_script( 'updates' );
+
+				\load_template( ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_DIR . 'templates/welcome.php', true );
+				break;
+		}
 	}
 }
--- a/includes/class-settings.php
+++ b/includes/class-settings.php
@ -3,7 +3,7 @@
 * General settings class.
 *
 * This file contains the General class definition, which handles the "General" settings
- * page for the ActivityPub Event Extension Plugin, providing options for configuring various general settings.
+ * page for the Activitypub Event Bridge Plugin, providing options for configuring various general settings.
 *
 * @package ActivityPub_Event_Bridge
 * @since 1.0.0
@ -61,6 +61,16 @@ class Settings {
 				'sanitize_callback' => array( self::class, 'sanitize_event_category_mappings' ),
 			)
 		);
+
+		\register_setting(
+			'activitypub-event-bridge',
+			'activitypub_event_bridge_initially_activated',
+			array(
+				'type'        => 'boolean',
+				'description' => \__( 'Whether the plugin just got activated for the first time.', 'activitypub' ),
+				'default'     => 1,
+			)
+		);
 	}

 	/**
--- a/includes/class-setup.php
+++ b/includes/class-setup.php
@ -17,6 +17,7 @@ defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

 use ActivityPub_Event_Bridge\Admin\Event_Plugin_Admin_Notices;
 use ActivityPub_Event_Bridge\Admin\General_Admin_Notices;
+use ActivityPub_Event_Bridge\Admin\Health_Check;
 use ActivityPub_Event_Bridge\Admin\Settings_Page;
 use ActivityPub_Event_Bridge\Plugins\Event_Plugin;

@ -129,6 +130,9 @@ class Setup {
 		'\ActivityPub_Event_Bridge\Plugins\The_Events_Calendar',
 		'\ActivityPub_Event_Bridge\Plugins\VS_Event_List',
 		'\ActivityPub_Event_Bridge\Plugins\My_Calendar',
+		'\ActivityPub_Event_Bridge\Plugins\WP_Event_Manager',
+		'\ActivityPub_Event_Bridge\Plugins\Eventin',
+		'\ActivityPub_Event_Bridge\Plugins\Modern_Events_Calendar_Lite',
 	);

 	/**
@ -165,20 +169,19 @@ class Setup {

 		add_action( 'admin_init', array( $this, 'do_admin_notices' ) );
 		add_action( 'admin_init', array( Settings::class, 'register_settings' ) );
+		add_action( 'admin_enqueue_scripts', array( self::class, 'enqueue_styles' ) );
+		add_action( 'admin_menu', array( Settings_Page::class, 'admin_menu' ) );
+		add_filter(
+			'plugin_action_links_' . ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_BASENAME,
+			array( Settings_Page::class, 'settings_link' )
+		);

 		// If we don't have any active event plugins, or the ActivityPub plugin is not enabled, abort here.
 		if ( empty( $this->active_event_plugins ) || ! $this->activitypub_plugin_is_active ) {
 			return;
 		}

-		add_action( 'admin_enqueue_scripts', array( self::class, 'enqueue_styles' ) );
-
-		add_action( 'admin_menu', array( Settings_Page::class, 'admin_menu' ) );
-
-		add_filter(
-			'plugin_action_links_' . ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_BASENAME,
-			array( Settings_Page::class, 'settings_link' )
-		);
+		add_action( 'init', array( Health_Check::class, 'init' ) );

 		// Check if the minimum required version of the ActivityPub plugin is installed.
 		if ( ! version_compare( $this->activitypub_plugin_version, ACTIVITYPUB_EVENT_BRIDGE_ACTIVITYPUB_PLUGIN_MIN_VERSION ) ) {
@ -206,6 +209,16 @@ class Setup {
 				array(),
 				ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_VERSION
 			);
+			wp_enqueue_script(
+				'activitypub-event-bridge-admin-script',
+				plugins_url(
+					'assets/js/activitypub-event-bridge-admin.js',
+					ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_FILE
+				),
+				array( 'jquery' ),
+				ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_VERSION,
+				false
+			);
 		}
 	}

@ -285,7 +298,7 @@ class Setup {
 	 * This method handles the activation of the ActivityPub Event Bridge plugin.
 	 *
 	 * @since 1.0.0
-	 *
+	 * @see register_activation_hook()
 	 * @return void
 	 */
 	public function activate(): void {
--- a/includes/plugins/class-event-plugin.php
+++ b/includes/plugins/class-event-plugin.php
@ -45,13 +45,25 @@ abstract class Event_Plugin {
 	abstract public static function get_event_category_taxonomy(): string;

 	/**
-	 * Returns the ID of the main settings page of the plugin.
+	 * Returns the IDs of the admin pages of the plugin.
 	 *
-	 * @return string The settings page url.
+	 * @return array The IDs of one or several admin/settings pages.
 	 */
-	public static function get_settings_page(): string {
+	public static function get_settings_pages(): array {
+		return array();
+	}
+
+	/**
+	 * Get the plugins name from the main plugin-file's top-level-file-comment.
+	 */
+	final public static function get_plugin_name(): string {
+		$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . static::get_plugin_file() );
+		if ( isset( $plugin_data['Name'] ) ) {
+			return $plugin_data['Name'];
+		} else {
 			return '';
 		}
+	}

 	/**
 	 * Detects whether the current screen is a admin page of the event plugin.
@ -62,7 +74,7 @@ abstract class Event_Plugin {

 		// Check if we are on a edit page for the event, or on the settings page of the event plugin.
 		$is_event_plugins_edit_page     = 'edit' === $screen->base && static::get_post_type() === $screen->post_type;
-		$is_event_plugins_settings_page = static::get_settings_page() === $screen->id;
+		$is_event_plugins_settings_page = in_array( $screen->id, static::get_settings_pages(), true );

 		return $is_event_plugins_edit_page || $is_event_plugins_settings_page;
 	}
--- a/includes/plugins/class-eventin.php
+++ b/includes/plugins/class-eventin.php
@ -0,0 +1,60 @@
+<?php
+/**
+ * The Events Calendar.
+ *
+ * Defines all the necessary meta information for the events calendar.
+ *
+ * @link    https://wordpress.org/plugins/the-events-calendar/
+ * @package ActivityPub_Event_Bridge
+ * @since   1.0.0
+ */
+
+namespace ActivityPub_Event_Bridge\Plugins;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+/**
+ * Interface for a supported event plugin.
+ *
+ * This interface defines which information is necessary for a supported event plugin.
+ *
+ * @since 1.0.0
+ */
+final class Eventin extends Event_plugin {
+	/**
+	 * Returns the full plugin file.
+	 *
+	 * @return string
+	 */
+	public static function get_plugin_file(): string {
+		return 'wp-event-solution/eventin.php';
+	}
+
+	/**
+	 * Returns the event post type of the plugin.
+	 *
+	 * @return string
+	 */
+	public static function get_post_type(): string {
+		return 'etn';
+	}
+
+	/**
+	 * Returns the IDs of the admin pages of the plugin.
+	 *
+	 * @return array The settings page url.
+	 */
+	public static function get_settings_pages(): array {
+		return array( 'eventin' ); // Base always is wp-admin/admin.php?page=eventin.
+	}
+
+	/**
+	 * Returns the taxonomy used for the plugin's event categories.
+	 *
+	 * @return string
+	 */
+	public static function get_event_category_taxonomy(): string {
+		return 'etn_category';
+	}
+}
--- a/includes/plugins/class-events-manager.php
+++ b/includes/plugins/class-events-manager.php
@ -41,12 +41,12 @@ final class Events_Manager extends Event_Plugin {
 	}

 	/**
-	 * Returns the ID of the main settings page of the plugin.
+	 * Returns the IDs of the admin pages of the plugin.
 	 *
-	 * @return string The settings page url.
+	 * @return array The settings page urls.
 	 */
-	public static function get_settings_page(): string {
-		return 'wp-admin/edit.php?post_type=event&page=events-manager-options#general';
+	public static function get_settings_page(): array {
+		return array();
 	}

 	/**
--- a/includes/plugins/class-gatherpress.php
+++ b/includes/plugins/class-gatherpress.php
@ -41,12 +41,12 @@ final class GatherPress extends Event_Plugin {
 	}

 	/**
-	 * Returns the ID of the main settings page of the plugin.
+	 * Returns the IDs of the admin pages of the plugin.
 	 *
-	 * @return string The settings page url.
+	 * @return array The settings page urls.
 	 */
-	public static function get_settings_page(): string {
-		return class_exists( '\GatherPress\Core\Utility' ) ? \GatherPress\Core\Utility::prefix_key( 'general' ) : 'gatherpress_general';
+	public static function get_settings_pages(): array {
+		return array( class_exists( '\GatherPress\Core\Utility' ) ? \GatherPress\Core\Utility::prefix_key( 'general' ) : 'gatherpress_general' );
 	}

 	/**
--- a/includes/plugins/class-modern-events-calendar-lite.php
+++ b/includes/plugins/class-modern-events-calendar-lite.php
@ -0,0 +1,61 @@
+<?php
+/**
+ * Modern Events Calendar (Lite)
+ *
+ * Defines all the necessary meta information for the Modern Events Calendar (Lite).
+ *
+ * @link    https://webnus.net/modern-events-calendar/
+ * @package ActivityPub_Event_Bridge
+ * @since   1.0.0
+ */
+
+namespace ActivityPub_Event_Bridge\Plugins;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+/**
+ * Interface for a supported event plugin.
+ *
+ * This interface defines which information is necessary for a supported event plugin.
+ *
+ * @since 1.0.0
+ */
+final class Modern_Events_Calendar_Lite extends Event_plugin {
+	/**
+	 * Returns the full plugin file.
+	 *
+	 * @return string
+	 */
+	public static function get_plugin_file(): string {
+		return 'modern-events-calendar-lite/modern-events-calendar-lite.php';
+	}
+
+	/**
+	 * Returns the event post type of the plugin.
+	 *
+	 * @return string
+	 */
+	public static function get_post_type(): string {
+		// See MEC_feature_events->get_main_post_type().
+		return apply_filters( 'mec_post_type_name', 'mec-events' ); // phpcs:ignore
+	}
+
+	/**
+	 * Returns the IDs of the admin pages of the plugin.
+	 *
+	 * @return array The settings page urls.
+	 */
+	public static function get_settings_pages(): array {
+		return array( 'MEC-settings', 'MEC-support', 'MEC-ix', 'MEC-wizard', 'MEC-addons', 'mec-intro' );
+	}
+
+	/**
+	 * Returns the taxonomy used for the plugin's event categories.
+	 *
+	 * @return string
+	 */
+	public static function get_event_category_taxonomy(): string {
+		return 'mec_category';
+	}
+}
--- a/includes/plugins/class-the-events-calendar.php
+++ b/includes/plugins/class-the-events-calendar.php
@ -41,17 +41,17 @@ final class The_Events_Calendar extends Event_plugin {
 	}

 	/**
-	 * Returns the ID of the main settings page of the plugin.
+	 * Returns the IDs of the admin pages of the plugin.
 	 *
-	 * @return string The settings page url.
+	 * @return array The settings page urls.
 	 */
-	public static function get_settings_page(): string {
+	public static function get_settings_pages(): array {
 		if ( class_exists( '\Tribe\Events\Admin\Settings' ) ) {
 			$page = \Tribe\Events\Admin\Settings::$settings_page_id;
 		} else {
 			$page = 'tec-events-settings';
 		}
-		return sprintf( 'edit.php?post_type=tribe_events&page=%s', $page );
+		return array( $page );
 	}

 	/**
--- a/includes/plugins/class-vs-event-list.php
+++ b/includes/plugins/class-vs-event-list.php
@ -44,12 +44,12 @@ final class VS_Event_List extends Event_Plugin {
 	}

 	/**
-	 * Returns the ID of the main settings page of the plugin.
+	 * Returns the IDs of the admin pages of the plugin.
 	 *
-	 * @return string The settings page url.
+	 * @return array The settings page urls.
 	 */
-	public static function get_settings_page(): string {
-		return 'settings_page_vsel';
+	public static function get_settings_pages(): array {
+		return array( 'settings_page_vsel' );
 	}

 	/**
--- a/includes/plugins/class-wp-event-manager.php
+++ b/includes/plugins/class-wp-event-manager.php
@ -0,0 +1,72 @@
+<?php
+/**
+ * WP Event Manager.
+ *
+ * Defines all the necessary meta information for the WordPress event plugin
+ * "WP Event Manager"
+ *
+ * @link    https://de.wordpress.org/plugins/wp-event-manager
+ * @package ActivityPub_Event_Bridge
+ * @since   1.0.0
+ */
+
+namespace ActivityPub_Event_Bridge\Plugins;
+
+use ActivityPub_Event_Bridge\Plugins\Event_Plugin;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+/**
+ * Interface for a supported event plugin.
+ *
+ * This interface defines which information is necessary for a supported event plugin.
+ *
+ * @since 1.0.0
+ */
+final class WP_Event_Manager extends Event_Plugin {
+	/**
+	 * Returns the full plugin file.
+	 *
+	 * @return string
+	 */
+	public static function get_plugin_file(): string {
+		return 'wp-event-manager/wp-event-manager.php';
+	}
+
+	/**
+	 * Returns the event post type of the plugin.
+	 *
+	 * @return string
+	 */
+	public static function get_post_type(): string {
+		return 'event_listing';
+	}
+
+	/**
+	 * Returns the IDs of the admin pages of the plugin.
+	 *
+	 * @return array The settings page urls.
+	 */
+	public static function get_settings_pages(): array {
+		return array( 'event-manager-settings' );
+	}
+
+	/**
+	 * Returns the ActivityPub transformer class.
+	 *
+	 * @return string
+	 */
+	public static function get_activitypub_transformer_class_name(): string {
+		return 'WP_Event_Manager';
+	}
+
+	/**
+	 * Returns the taxonomy used for the plugin's event categories.
+	 *
+	 * @return string
+	 */
+	public static function get_event_category_taxonomy(): string {
+		return 'event_listing_category';
+	}
+}
--- a/readme.txt
+++ b/readme.txt
@ -32,6 +32,16 @@ These platforms create public event calendars by pulling in events from various
 ![](./.wordpress-org/decentralized-event-calenders.gif)


+= Features for Your WordPress Events and the Fediverse =
+
+**ActivityPub-Enabled Event Sharing:** Your WordPress events are now compatible with the Fediverse, using the ActivityStreams format. This means your events can be easily discovered and followed by users on platforms like Mastodon and other ActivityPub-compatible services.
+
+**Automatic Event Summaries:** When your event is shared on the Fediverse, platforms like Mastodon that don't fully support events will display a brief HTML summary of key details — such as the event's title, start time, and location. This ensures that even if someone can't view the full event on their platform, they still get the important info at a glance, with a link to your WordPress event page.
+
+**Improved Event Discoverability:** Your custom event categories are mapped to a set of default categories used in the Fediverse, helping your events reach a wider audience. This improves the chances that users searching for similar events on other platforms will find yours.
+
+**Event Reminders for Your Followers:** Often, events are planned well in advance. To keep your followers informed right in time, you can set up reminders that are supposed to trigger the events showing up in their timelines right before the event starts. At the moment this reminder is implemented as a self-boost of your original event post. While this feature may behave differently across various platforms, we are working on a more robust solution that will let you schedule dedicated reminder notes that appear in all followers' timelines.
+
 == Installation ==

 This plugin depends on the [ActivityPub plugin](https://wordpress.org/plugins/activitypub/). Additionally, you need to use one of the supported event Plugins.
@ -41,6 +51,10 @@ This plugin depends on the [ActivityPub plugin](https://wordpress.org/plugins/ac
 * [The Events Calendar](https://de.wordpress.org/plugins/the-events-calendar/)
 * [VS Event List](https://de.wordpress.org/plugins/very-simple-event-list/)
 * [Events Manager](https://de.wordpress.org/plugins/events-manager/)
+* [WP Event Manager](https://de.wordpress.org/plugins/wp-event-manager/)
+* [Eventin](https://de.wordpress.org/plugins/wp-event-solution/)
+* [Modern Events Calendar Lite](https://webnus.net/modern-events-calendar/)
+* [GatherPress](https://gatherpress.org/)

 == Configuration ==

--- a/templates/admin-header.php
+++ b/templates/admin-header.php
@ -0,0 +1,33 @@
+<?php
+/**
+ * Template for the header and navigation of the admin pages.
+ *
+ * @package ActivityPub_Event_Bridge
+ */
+
+/* @var array $args Template arguments. */
+$args = wp_parse_args(
+	$args,
+	array(
+		'welcome'  => '',
+		'settings' => '',
+	)
+);
+?>
+
+<div class="activitypub-event-bridge-settings-header">
+	<div class="activitypub-event-bridge-settings-title-section">
+		<h1><?php \esc_html_e( 'ActivityPub Event Bridge', 'activitypub-event-bridge' ); ?></h1>
+	</div>
+
+	<nav class="activitypub-event-bridge-settings-tabs-wrapper" aria-label="<?php \esc_attr_e( 'Secondary menu', 'activitypub-event-bridge' ); ?>">
+		<a href="<?php echo \esc_url( admin_url( 'options-general.php?page=activitypub-event-bridge' ) ); ?>" class="activitypub-event-bridge-settings-tab <?php echo \esc_attr( $args['welcome'] ); ?>">
+			<?php \esc_html_e( 'Welcome', 'activitypub-event-bridge' ); ?>
+		</a>
+
+		<a href="<?php echo \esc_url( admin_url( 'options-general.php?page=activitypub-event-bridge&tab=settings' ) ); ?>" class="activitypub-event-bridge-settings-tab <?php echo \esc_attr( $args['settings'] ); ?>">
+			<?php \esc_html_e( 'Settings', 'activitypub-event-bridge' ); ?>
+		</a>
+	</nav>
+</div>
+<hr class="wp-header-end">
--- a/templates/settings.php
+++ b/templates/settings.php
@ -13,6 +13,14 @@
 // Exit if accessed directly.
 defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore

+\load_template(
+	__DIR__ . '/admin-header.php',
+	true,
+	array(
+		'settings' => 'active',
+	)
+);
+
 use Activitypub\Activity\Extended_Object\Event;

 if ( ! isset( $args ) || ! array_key_exists( 'event_terms', $args ) ) {
@ -31,19 +39,12 @@ $selected_default_event_category = \get_option( 'activitypub_event_bridge_defaul
 $current_category_mapping        = \get_option( 'activitypub_event_bridge_event_category_mappings', array() );
 ?>

-<div class="activitypub-settings-header">
-	<div class="activitypub-settings-title-section">
-		<h1><?php \esc_html_e( 'ActivityPub Event Bridge', 'activitypub-event-bridge' ); ?></h1>
-	</div>
-</div>
-<hr class="wp-header-end">
-
-<div class="activitypub-settings activitypub-settings-page activitypub-event-bridge-settings-page hide-if-no-js">
+<div class="activitypub-event-bridge-settings activitypub-event-bridge-settings-page hide-if-no-js">
 	<form method="post" action="options.php">
 		<?php \settings_fields( 'activitypub-event-bridge' ); ?>

 		<div class="box">
-			<h2> <?php esc_html_e( 'Default ActivityPub Event Category', 'activitypub-event-bridge' ); ?> </h2>
+			<h2> <?php esc_html_e( 'ActivityPub Event Category', 'activitypub-event-bridge' ); ?> </h2>
 			<p> <?php esc_html_e( 'To help visitors find events more easily, the community created a set of basic event categories. Please select the category that best matches the majority of the events you organize.', 'activitypub-event-bridge' ); ?> </p>
 			<table class="form-table">
 				<tr>
@ -59,11 +60,9 @@ $current_category_mapping        = \get_option( 'activitypub_event_bridge_event_
 					</td>
 				</tr>
 			</table>
-		</div>

 			<?php if ( ! empty( $event_terms ) ) : ?>
-		<div class="box">
-			<h2> <?php esc_html_e( 'Advanced Event Category Settings', 'activitypub-event-bridge' ); ?> </h2>
+			<h3> <?php esc_html_e( 'Advanced Event Category Settings', 'activitypub-event-bridge' ); ?> </h3>
 			<p> <?php esc_html_e( 'Take more control by adjusting how your event categories are mapped to the basic category set used in ActivityPub. This option lets you override the default selection above, ensuring more accurate categorization and better visibility for your events.', 'activitypub-event-bridge' ); ?> </p>
 			<table class="form-table">
 				<?php foreach ( $event_terms as $event_term ) { ?>
@ -96,8 +95,12 @@ $current_category_mapping        = \get_option( 'activitypub_event_bridge_event_
 					</tr>
 				<?php } ?>
 			</table>
-		</div>
 			<?php endif; ?>
+		</div>
+		<!-- This disables the setup wizard. -->
+		<div class="hidden">
+			<input type="checkbox" id="activitypub_event_bridge_initially_activated" name="activitypub_event_bridge_initially_activated"/>
+		</div>
 		<?php \submit_button(); ?>
 	</form>
 </div>
--- a/templates/welcome.php
+++ b/templates/welcome.php
@ -0,0 +1,237 @@
+<?php
+/**
+ * Status page for the ActivityPub Event Bridge.
+ *
+ * @package ActivityPub_Event_Bridge
+ */
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+use ActivityPub_Event_Bridge\Setup;
+use ActivityPub_Event_Bridge\Admin\Settings_Page;
+use ActivityPub_Event_Bridge\Admin\Health_Check;
+
+\load_template(
+	__DIR__ . '/admin-header.php',
+	true,
+	array(
+		'welcome' => 'active',
+	)
+);
+
+$active_event_plugins               = Setup::get_instance()->get_active_event_plugins();
+$activitypub_event_bridge_status_ok = true;
+$example_event_post                 = Health_Check::get_most_recent_event_posts();
+
+if ( empty( $example_event_post ) ) {
+	$example_event_post          = 'https://yoursite.com/events/event-name';
+	$example_event_post_is_dummy = true;
+} else {
+	$example_event_post          = \get_permalink( $example_event_post[0] );
+	$example_event_post_is_dummy = false;
+}
+
+global $wp_filesystem;
+WP_Filesystem();
+
+?>
+
+<div class="activitypub-event-bridge-settings activitypub-event-bridge-settings-page hide-if-no-js">
+	<div class="box">
+		<h2><?php \esc_html_e( 'Status', 'activitypub-event-bridge' ); ?></h2>
+		<p><?php \esc_html_e( 'The ActivityPub Event Bridge detected the following (activated) event plugins:', 'activitypub-event-bridge' ); ?></p>
+			<?php foreach ( $active_event_plugins as $active_event_plugin ) { ?>
+			<h3><?php echo esc_html( $active_event_plugin->get_plugin_name() ); ?>:</h3>
+			<ul class="activitypub-event-bridge-list">
+				<li>
+					<?php
+					if ( in_array( $active_event_plugin::get_post_type(), get_option( 'activitypub_support_post_types', array() ), true ) ) {
+						echo '&#9989 ';
+						$status_message_post_type_enabled = sprintf(
+							/* translators: 1: the name of the event plugin a admin notice is shown. 2: The name of the ActivityPub plugin. */
+							_x(
+								'The ActivityPub support for the event post type of the plugin <i>%2$s</i> is enabled in the <a href="%3$s">%1$s settings</a>.',
+								'admin notice',
+								'activitypub-event-bridge'
+							),
+							esc_html( get_plugin_data( ACTIVITYPUB_PLUGIN_FILE )['Name'] ),
+							esc_html( $active_event_plugin->get_plugin_name() ),
+							admin_url( 'options-general.php?page=activitypub&tab=settings' )
+						);
+					} else {
+						$activitypub_event_bridge_status_ok = false;
+						echo '&#10060 ';
+						$status_message_post_type_enabled = sprintf(
+							/* translators: 1: the name of the event plugin a admin notice is shown. 2: The name of the ActivityPub plugin. */
+							_x(
+								'The post type for events of the plugin <i>%2$s</i> is <b>not enabled</b> in the <a href="%3$s">%1$s settings</a>.',
+								'admin notice',
+								'activitypub-event-bridge'
+							),
+							esc_html( get_plugin_data( ACTIVITYPUB_PLUGIN_FILE )['Name'] ),
+							esc_html( $active_event_plugin->get_plugin_name() ),
+							admin_url( 'options-general.php?page=activitypub&tab=settings' )
+						);
+					}
+					$allowed_html = array(
+						'a' => array(
+							'href'  => true,
+							'title' => true,
+						),
+						'b' => array(),
+						'i' => array(),
+					);
+					echo \wp_kses( $status_message_post_type_enabled, $allowed_html );
+					?>
+				</li>
+				<li>
+					<?php
+					if ( Health_Check::test_if_event_transformer_is_used( $active_event_plugin ) ) {
+						echo '&#9989 ';
+						esc_html_e( 'The ActivityPub Event Bridge successfully registered to the ActivityPub plugin.', 'activitypub-event-bridge' );
+					} else {
+						$activitypub_event_bridge_status_ok = false;
+						echo '&#10060 ';
+						esc_html_e( 'The ActivityPub Event Bridge could not register to the ActivityPub plugin.', 'activitypub-event-bridge' );
+					}
+					?>
+				</li>
+			</ul>
+		<?php } ?>
+	</div>
+
+	<?php if ( get_option( 'activitypub_event_bridge_initially_activated', true ) ) : ?>
+		<a href="<?php echo esc_url( admin_url( 'options-general.php?page=' . Settings_Page::SETTINGS_SLUG ) . '&tab=settings' ); ?>" role="button">
+			<button class="button button-primary">
+				<strong>→</strong> <?php \esc_html_e( 'Continue your setup', 'activitypub-event-bridge' ); ?>
+			</button>
+		</a>
+
+	<?php else : ?>
+
+	<div class="box">
+		<h2><?php \esc_html_e( 'How to Check if It\'s Working', 'activitypub-event-bridge' ); ?></h2>
+		<?php
+		if ( ! $activitypub_event_bridge_status_ok ) {
+			echo '<div class="notice-warning"><p>' . \esc_html__( 'Please fix the status issues above first.', 'activitypub-event-bridge' ) . '</p></div>';
+		}
+		?>
+		<p><?php esc_html_e( 'Most of the magic happens behind the scenes, but here is how you can verify that your events are ready to be discovered:', 'activitypub-event-bridge' ); ?></p>
+		<div class="activitypub-event-bridge-settings-accordion">
+			<h4 class="activitypub-event-bridge-settings-accordion-heading">
+				<button aria-expanded="false" class="activitypub-event-bridge-settings-accordion-trigger" aria-controls="activitypub-event-bridge-help-accordion-mastodon" type="button">
+					<span class="title">
+						1. 
+						<img src="<?php echo esc_url( plugins_url( '/assets/img/mastodon.svg', ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_FILE ) ); ?>" alt="Mastodon Icon" class="activitypub-event-bridge-settings-inline-icon">
+						<?php \esc_html_e( 'Using Your Mastodon Account', 'activitypub-event-bridge' ); ?>
+					</span>
+					<span class="icon"></span>
+				</button>
+			</h4>
+			<div id="activitypub-event-bridge-help-accordion-mastodon" class="activitypub-event-bridge-settings-accordion-panel" hidden="hidden">
+				<ol class="activitypub-event-bridge-settings-numbered-list">
+					<li><?php \esc_html_e( 'Log into your Mastodon account.', 'activitypub-event-bridge' ); ?></li>
+					<li>
+						<?php \esc_html_e( 'In the search bar, type or copy the full URL of one of your event pages. For example:', 'activitypub-event-bridge' ); ?>
+						<code class="activitypub-event-bridge-settings-example-url"><?php echo \esc_url( $example_event_post ); ?></code>
+					</li>
+					<li><?php \esc_html_e( 'If everything is set up correctly, you\'ll see a post representing your event. It should include the event\'s image, title, and a brief description.', 'activitypub-event-bridge' ); ?></li>
+				</ol>
+			</div>
+			<h4 class="activitypub-event-bridge-settings-accordion-heading">
+				<button aria-expanded="false" class="activitypub-event-bridge-settings-accordion-trigger" aria-controls="activitypub-event-bridge-help-accordion-mobilizon" type="button">
+					<span class="title">
+						2. 
+						<img src="<?php echo esc_url( plugins_url( '/assets/img/mobilizon.svg', ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_FILE ) ); ?>" alt="Mastodon Icon" class="activitypub-event-bridge-settings-inline-icon">
+						<?php \esc_html_e( 'Using Your Mobilizon Account', 'activitypub-event-bridge' ); ?>
+					</span>
+					<span class="icon"></span>
+				</button>
+			</h4>
+			<div id="activitypub-event-bridge-help-accordion-mobilizon" class="activitypub-event-bridge-settings-accordion-panel" hidden="hidden">
+				<ol class="activitypub-event-bridge-settings-numbered-list">
+					<li><?php \esc_html_e( 'Log into your Mobilizon account.', 'activitypub-event-bridge' ); ?></li>
+					<li>
+						<?php \esc_html_e( 'In the search bar, type or copy the full URL of one of your event pages. For example:', 'activitypub-event-bridge' ); ?>
+						<code class="activitypub-event-bridge-settings-example-url"><?php echo \esc_url( $example_event_post ); ?></code>
+					</li>
+					<li><?php \esc_html_e( 'If everything is set up correctly, you\'ll see a full representation of your WordPress event. This will include the event\'s banner image, title, complete description, start and end times, categories, tags, and whether it\'s an online event.', 'activitypub-event-bridge' ); ?></li>
+				</ol>
+			</div>
+			<h4 class="activitypub-event-bridge-settings-accordion-heading">
+				<button aria-expanded="false" class="activitypub-event-bridge-settings-accordion-trigger" aria-controls="activitypub-event-bridge-help-accordion-fediverse" type="button">
+					<span class="title">
+						3. 
+						<img src="<?php echo esc_url( plugins_url( '/assets/img/fediverse.svg', ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_FILE ) ); ?>" alt="Mastodon Icon" class="activitypub-event-bridge-settings-inline-icon">
+						<?php \esc_html_e( 'Using Any Other Fediverse Application', 'activitypub-event-bridge' ); ?>
+					</span>
+					<span class="icon"></span>
+				</button>
+			</h4>
+			<div id="activitypub-event-bridge-help-accordion-fediverse" class="activitypub-event-bridge-settings-accordion-panel" hidden="hidden">
+				<p><?php \esc_html_e( 'Of course any other application in the Fediverse should work as well. Most applications support importing external content via searching for the contents full URL.', 'activitypub-event-bridge' ); ?></p>
+				<ol class="activitypub-event-bridge-settings-numbered-list">
+					<li><?php \esc_html_e( 'Log into your account on any Fediverse app.', 'activitypub-event-bridge' ); ?></li>
+					<li>
+						<?php \esc_html_e( 'In the search bar, type or copy the full URL of one of your event pages. For example:', 'activitypub-event-bridge' ); ?>
+						<code class="activitypub-event-bridge-settings-example-url"><?php echo \esc_url( $example_event_post ); ?></code>
+					</li>
+					<li><?php \esc_html_e( 'If the application which your are using natively supports ActivityPub events, you should see a representation of your WordPress event. If your application is supports receiving ActivityPub events you will get a post which summarizes the event. Keep in mind that some apps may not support events at all.', 'activitypub-event-bridge' ); ?></li>
+				</ol>
+			</div>
+			<h4 class="activitypub-event-bridge-settings-accordion-heading">
+				<button aria-expanded="false" class="activitypub-event-bridge-settings-accordion-trigger" aria-controls="activitypub-event-bridge-help-accordion-advanced" type="button">
+					<span class="title">
+						4. 
+						<img src="<?php echo esc_url( plugins_url( '/assets/img/activitypub.svg', ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_FILE ) ); ?>" alt="Mastodon Icon" class="activitypub-event-bridge-settings-inline-icon">
+						<?php \esc_html_e( 'Advanced: Verifying the ActivityStreams JSON', 'activitypub-event-bridge' ); ?></span>
+					<span class="icon"></span>
+				</button>
+			</h4>
+			<div id="activitypub-event-bridge-help-accordion-advanced" class="activitypub-event-bridge-settings-accordion-panel" hidden="hidden">
+				<p>
+					<?php
+					// Assume $event_url contains the dynamic URL, and '?activitypub' is appended to it.
+					$activitypub_url = esc_url( $example_event_post . '?activitypub' );
+
+					// Prepare the activitypub part wrapped in a <code> element.
+					$activitypub_query = '<nobr><code>' . esc_html( '?activitypub' ) . '</code></nobr>';
+
+					$activitypub_url_html = '<a href="' . esc_url( $activitypub_url ) . '" target="_blank">' . esc_html( $activitypub_url ) . '</a>';
+
+					// Translator comment to explain the placeholder.
+					/* translators: %1$s is the <code>?activitypub</code> string, and %2$s is the full URL of an example event */
+					$raw_string = sprintf( __( 'For more technical users, you can inspect how your event is converted into an ActivityPub object. Simply append %1$s to the end of 	any single event pages URL to view the raw ActivityStreams JSON data (e.g., %2$s).', 'activitypub-event-bridge' ), $activitypub_query, $activitypub_url_html );
+
+					// Allowed HTML tags in the string (only <code> and <a>).
+					$allowed_html = array(
+						'a'    => array(
+							'href'   => array(),
+							'target' => array(),
+						),
+						'nobr' => array(),
+						'code' => array(),
+					);
+
+					// Output the formatted string with the allowed HTML elements.
+					echo wp_kses( $raw_string, $allowed_html );
+					?>
+				</p>
+			</div>
+		</div>
+	</div>
+
+	<div class="box">
+		<h2><?php \esc_html_e( 'Changelog', 'activitypub-event-bridge' ); ?></h2>
+		<pre>
+			<?php
+			$changelog = $wp_filesystem->get_contents( ACTIVITYPUB_EVENT_BRIDGE_PLUGIN_DIR . '/CHANGELOG.md' );
+			echo esc_html( substr( $changelog, strpos( $changelog, "\n", 180 ) + 1 ) );
+			?>
+		</pre>
+	</div>
+	<?php endif; ?>
+
+</div>
+
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@ -43,6 +43,10 @@ function _manually_load_plugin() {
 		}
 	}

+	// Hot fixes for eventin.
+	update_option( 'purchase_history_table_structure_migration_done', true );
+	update_option( 'etn_wizard', 'active' );
+
 	$plugin_file = null;
 	// See if we want to run integration tests for a specific event-plugin.
 	switch ( $activitypub_event_extension_integration_filter ) {
@ -55,14 +59,24 @@ function _manually_load_plugin() {
 		case 'events_manager':
 			$plugin_file = 'events-manager/events-manager.php';
 			break;
+		case 'eventin':
+			$plugin_file = 'wp-event-solution/eventin.php';
+			break;
+		case 'modern_events_calendar_lite':
+			$plugin_file = 'modern-events-calendar-lite/modern-events-calendar-lite.php';
+			break;
 		case 'gatherpress':
 			$plugin_file = 'gatherpress/gatherpress.php';
 			break;
+		case 'wp_event_manager':
+			$plugin_file = 'wp-event-manager/wp-event-manager.php';
+			break;
 	}

 	if ( $plugin_file ) {
 		// Manually load the event plugin.
 		require_once $plugin_dir . $plugin_file;
+		update_option( 'purchase_history_table_structure_migration_done', true );
 		$current   = get_option( 'active_plugins', array() );
 		$current[] = $plugin_file;
 		sort( $current );
@ -77,6 +91,12 @@ function _manually_load_plugin() {
 		em_create_locations_table();
 	}

+	if ( 'modern_events_calendar_lite' === $activitypub_event_extension_integration_filter ) {
+		require_once $plugin_dir . 'modern-events-calendar-lite/app/libraries/factory.php';
+		$mec_factory = new MEC_factory();
+		$mec_factory->install();
+	}
+
 	// At last manually load our WordPress plugin.
 	require dirname( __DIR__ ) . '/activitypub-event-bridge.php';
 }
--- a/tests/test-class-plugin-eventin.php
+++ b/tests/test-class-plugin-eventin.php
@ -0,0 +1,175 @@
+<?php
+/**
+ * Tests for WP Event Solution.
+ *
+ * @package ActivityPub_Event_Bridge
+ */
+
+/**
+ * Test cases for WP Event Solution.
+ */
+class Test_Eventin extends WP_UnitTestCase {
+	/**
+	 * Basic Mock-up event.
+	 */
+	private function get_mockup_event(): array {
+		return array(
+			'post_status'    => 'publish',
+			'post_title'     => 'Eventin Test Event Title',
+			'post_content'   => 'Eventin Test Event Description',
+			'etn_start_date' => \gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ),
+			'etn_end_date'   => \gmdate( 'Y-m-d', strtotime( '+10 days 16:00:00' ) ),
+			'etn_start_time' => \gmdate( 'H:i', strtotime( '+10 days 15:00:00' ) ),
+			'etn_end_time'   => \gmdate( 'H:i', strtotime( '+10 days 16:00:00' ) ),
+			'event_timezone' => 'Europe/Vienna',
+		);
+	}
+
+	/**
+	 * Override the setup function, so that tests don't run if the Events Calendar is not active.
+	 */
+	public function set_up() {
+		parent::set_up();
+
+		if ( ! class_exists( '\Wpeventin' ) ) {
+			self::markTestSkipped( 'Eventin plugin is not active.' );
+		}
+
+		// Make sure that ActivityPub support is enabled for The Events Calendar.
+		$aec = \ActivityPub_Event_Bridge\Setup::get_instance();
+		$aec->activate_activitypub_support_for_active_event_plugins();
+
+		// Delete all posts afterwards.
+		_delete_all_posts();
+	}
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_eventin_transformer_class() {
+		// We only test for one event plugin being active at the same time,
+		// even though we support multiple onces in theory.
+		// But testing all combinations is beyond scope.
+		$active_event_plugins = \ActivityPub_Event_Bridge\Setup::get_instance()->get_active_event_plugins();
+		$this->assertEquals( 1, count( $active_event_plugins ) );
+
+		// Enable ActivityPub support for the event plugin.
+		$this->assertContains( 'etn', get_option( 'activitypub_support_post_types' ) );
+
+		// Create a Eventin Event without content.
+		$event = new \Etn\Core\Event\Event_Model();
+		$event->create( $this->get_mockup_event() );
+
+		// Call the transformer Factory.
+		$transformer = \Activitypub\Transformer\Factory::get_transformer( get_post( $event->id ) );
+
+		// Check that we got the right transformer.
+		$this->assertInstanceOf( \ActivityPub_Event_Bridge\Activitypub\Transformer\Eventin::class, $transformer );
+	}
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_eventin_test_minimal_event() {
+		// Create a Eventin Event without content.
+		$event = new \Etn\Core\Event\Event_Model();
+		$event->create( $this->get_mockup_event() );
+
+		// Call the transformer Factory.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $event->id ) )->to_object()->to_array();
+
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'Eventin Test Event Title', $event_array['name'] );
+		$this->assertEquals( 'Eventin Test Event Description', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 15:00:00' ) ), $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 16:00:00' ) ), $event_array['endTime'] );
+		$this->assertEquals( 'Europe/Vienna', $event_array['timezone'] );
+		$this->assertEquals( comments_open( $event->id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $event->id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertArrayNotHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+		$this->assertEquals( false, $event_array['isOnline'] );
+	}
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_eventin_test_online_event_with_custom_link() {
+		// Create a Eventin Event without content.
+		$event = new \Etn\Core\Event\Event_Model();
+		$args  = array_merge(
+			$this->get_mockup_event(),
+			array(
+				'event_type' => 'online',
+				'location'   => array(
+					'integration' => 'custom_url',
+					'custom_url'  => 'https://jit.si/eventmeeting',
+				),
+			)
+		);
+		$event->create( $args );
+
+		// Call the transformer Factory.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $event->id ) )->to_object()->to_array();
+
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'Eventin Test Event Title', $event_array['name'] );
+		$this->assertEquals( 'Eventin Test Event Description', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 15:00:00' ) ), $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 16:00:00' ) ), $event_array['endTime'] );
+		$this->assertEquals( 'Europe/Vienna', $event_array['timezone'] );
+		$this->assertEquals( comments_open( $event->id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $event->id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertArrayNotHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+		$this->assertEquals( true, $event_array['isOnline'] );
+		$this->assertContains(
+			array(
+				'type'      => 'Link',
+				'mediaType' => 'text/html',
+				'name'      => 'https://jit.si/eventmeeting',
+				'href'      => 'https://jit.si/eventmeeting',
+			),
+			$event_array['attachment']
+		);
+	}
+
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_eventin_test_online_event_with_physical_location() {
+		// Create a Eventin Event without content.
+		$event = new \Etn\Core\Event\Event_Model();
+		$args  = array_merge(
+			$this->get_mockup_event(),
+			array(
+				'event_type' => 'offline',
+				'location'   => array(
+					'address' => 'The NlNet center',
+				),
+			)
+		);
+		$event->create( $args );
+
+		// Call the transformer Factory.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $event->id ) )->to_object()->to_array();
+
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'Eventin Test Event Title', $event_array['name'] );
+		$this->assertEquals( 'Eventin Test Event Description', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 15:00:00' ) ), $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d\TH:i:s\Z', strtotime( '+10 days 16:00:00' ) ), $event_array['endTime'] );
+		$this->assertEquals( 'Europe/Vienna', $event_array['timezone'] );
+		$this->assertEquals( comments_open( $event->id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $event->id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertArrayHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+		$this->assertEquals( false, $event_array['isOnline'] );
+		$this->assertEquals( 'The NlNet center', $event_array['location']['address'] );
+		$this->assertEquals( 'The NlNet center', $event_array['location']['name'] );
+	}
+}
--- a/tests/test-class-plugin-modern-events-calendar-lite.php
+++ b/tests/test-class-plugin-modern-events-calendar-lite.php
@ -0,0 +1,185 @@
+<?php
+/**
+ * Tests or Modern Events Calendar Lite
+ *
+ * @package ActivityPub_Event_Bridge
+ */
+
+/**
+ * Sample test case.
+ */
+class Test_Modern_Events_Calendar_Lite extends WP_UnitTestCase {
+	/**
+	 * The MEC main instance.
+	 *
+	 * @var \MEC_main|null
+	 */
+	protected $mec_main;
+
+	/**
+	 * Override the setup function, so that tests don't run if the Events Calendar is not active.
+	 */
+	public function set_up() {
+		parent::set_up();
+
+		if ( ! class_exists( '\MEC' ) ) {
+			self::markTestSkipped( 'Modern Events Calendar Lite is not active.' );
+		}
+
+		// Make sure that ActivityPub support is enabled for The Events Calendar.
+		$aec = \ActivityPub_Event_Bridge\Setup::get_instance();
+		$aec->activate_activitypub_support_for_active_event_plugins();
+
+		$this->mec_main = \MEC::getInstance( 'app.libraries.main' );
+
+		// Delete all posts afterwards.
+		_delete_all_posts();
+	}
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_modern_events_calendar_lite_transformer_class() {
+		// We only test for one event plugin being active at the same time,
+		// even though we support multiple onces in theory.
+		// But testing all combinations is beyond scope.
+		$active_event_plugins = \ActivityPub_Event_Bridge\Setup::get_instance()->get_active_event_plugins();
+		$this->assertEquals( 1, count( $active_event_plugins ) );
+
+		// Enable ActivityPub support for the event plugin.
+		$this->assertContains( 'mec-events', get_option( 'activitypub_support_post_types' ) );
+
+		// Insert a new Event.
+		$event = array(
+			'title'              => 'MEC Test Event',
+			'status'             => 'publish',
+			'start_time_hour'    => '3',
+			'start_time_minutes' => '00',
+			'start_time_ampm'    => 'PM',
+			'start'              => '2025-01-01',
+			'end'                => '2025-01-01',
+			'end_time_hour'      => '4',
+			'end_time_minutes'   => '00',
+			'end_time_ampm'      => 'PM',
+			'repeat_status'      => 0,
+			'repeat_type'        => 'daily',
+			'interval'           => 1,
+		);
+
+		$post_id = $this->mec_main->save_event( $event );
+
+		$wp_object = get_post( $post_id );
+
+		// Call the transformer Factory.
+		$transformer = \Activitypub\Transformer\Factory::get_transformer( $wp_object );
+
+		// Check that we got the right transformer.
+		$this->assertInstanceOf( \ActivityPub_Event_Bridge\Activitypub\Transformer\Modern_Events_Calendar_Lite::class, $transformer );
+	}
+
+	/**
+	 * Test that the transformation of minimal event.
+	 */
+	public function test_modern_events_calendar_lite_minimal_event() {
+		$start_timestamp = strtotime( '+10 days 15:00:00' );
+		$end_timestamp   = strtotime( '+10 days 16:00:00' );
+
+		// Insert a new Event.
+		$event = array(
+			'title'              => 'MEC Test Event',
+			'status'             => 'publish',
+			'content'            => 'This is the content of the MEC!',
+			'start_time_hour'    => gmdate( 'h', $start_timestamp ),
+			'start_time_minutes' => gmdate( 'i', $start_timestamp ),
+			'start_time_ampm'    => gmdate( 'A', $start_timestamp ),
+			'start'              => gmdate( 'Y-m-d', $start_timestamp ),
+			'end'                => gmdate( 'Y-m-d', $end_timestamp ),
+			'end_time_hour'      => gmdate( 'h', $end_timestamp ),
+			'end_time_minutes'   => gmdate( 'i', $end_timestamp ),
+			'end_time_ampm'      => gmdate( 'A', $end_timestamp ),
+			'repeat_status'      => 0,
+			'repeat_type'        => 'daily',
+			'interval'           => 1,
+		);
+
+		$post_id = $this->mec_main->save_event( $event );
+
+		$wp_object = get_post( $post_id );
+
+		// Call the transformer to make the ActivityStreams representation of the event.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( $wp_object )->to_object()->to_array();
+
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'MEC Test Event', $event_array['name'] );
+		$this->assertEquals( 'This is the content of the MEC!', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T15:00:00Z', $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 16:00:00' ) ) . 'T16:00:00Z', $event_array['endTime'] );
+		$this->assertTrue( $event_array['commentsEnabled'] );
+		$this->assertEquals( 'allow_all', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertEquals( get_permalink( $wp_object ), $event_array['externalParticipationUrl'] );
+		$this->assertArrayNotHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+	}
+
+	/**
+	 * Test that the transformation of minimal event.
+	 */
+	public function test_modern_events_calendar_lite_event_with_location() {
+		$start_timestamp = strtotime( '+10 days 15:00:00' );
+		$end_timestamp   = strtotime( '+10 days 16:00:00' );
+
+		// Add new location.
+		$location = array(
+			'name'      => 'MEC Location',
+			'latitude'  => '52.356370',
+			'longitude' => '4.955760',
+			'address'   => 'Stichting NLnet, Science Park 400, 1098 XH Amsterdam',
+			'url'       => 'https://nlnet.nl/',
+		);
+
+		$location_id = $this->mec_main->save_location( $location );
+
+		// Insert a new Event.
+		$event = array(
+			'title'              => 'MEC Test Event',
+			'status'             => 'publish',
+			'content'            => 'This is the content of the MEC!',
+			'start_time_hour'    => gmdate( 'h', $start_timestamp ),
+			'start_time_minutes' => gmdate( 'i', $start_timestamp ),
+			'start_time_ampm'    => gmdate( 'A', $start_timestamp ),
+			'start'              => gmdate( 'Y-m-d', $start_timestamp ),
+			'end'                => gmdate( 'Y-m-d', $end_timestamp ),
+			'end_time_hour'      => gmdate( 'h', $end_timestamp ),
+			'end_time_minutes'   => gmdate( 'i', $end_timestamp ),
+			'end_time_ampm'      => gmdate( 'A', $end_timestamp ),
+			'repeat_status'      => 0,
+			'repeat_type'        => 'daily',
+			'interval'           => 1,
+			'location_id'        => $location_id,
+		);
+
+		$post_id = $this->mec_main->save_event( $event );
+
+		$wp_object = get_post( $post_id );
+
+		// Call the transformer to make the ActivityStreams representation of the event.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( $wp_object )->to_object()->to_array();
+
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'MEC Test Event', $event_array['name'] );
+		$this->assertEquals( 'This is the content of the MEC!', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T15:00:00Z', $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 16:00:00' ) ) . 'T16:00:00Z', $event_array['endTime'] );
+		$this->assertTrue( $event_array['commentsEnabled'] );
+		$this->assertEquals( 'allow_all', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertEquals( get_permalink( $wp_object ), $event_array['externalParticipationUrl'] );
+		$this->assertArrayHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+		$this->assertEquals( $location['address'], $event_array['location']['address'] );
+		$this->assertEquals( $location['name'], $event_array['location']['name'] );
+		$this->assertEquals( $location['latitude'], $event_array['location']['latitude'] );
+		$this->assertEquals( $location['longitude'], $event_array['location']['longitude'] );
+	}
+}
--- a/tests/test-class-plugin-vs-event-list.php
+++ b/tests/test-class-plugin-vs-event-list.php
@ -44,7 +44,7 @@ class Test_VS_Event_List extends WP_UnitTestCase {
 		$wp_post_id = wp_insert_post(
 			array(
 				'post_title'  => 'VSEL Test Event',
-				'post_status' => 'published',
+				'post_status' => 'publish',
 				'post_type'   => 'event',
 				'meta_input'  => array(
 					'event-start-date' => strtotime( '+10 days 15:00:00' ),
@ -69,7 +69,7 @@ class Test_VS_Event_List extends WP_UnitTestCase {
 		$wp_post_id = wp_insert_post(
 			array(
 				'post_title'  => 'VSEL Test Event',
-				'post_status' => 'published',
+				'post_status' => 'publish',
 				'post_type'   => 'event',
 				'meta_input'  => array(
 					'event-start-date' => strtotime( '+10 days 15:00:00' ),
@ -102,7 +102,7 @@ class Test_VS_Event_List extends WP_UnitTestCase {
 		$wp_post_id = wp_insert_post(
 			array(
 				'post_title'  => 'VSEL Test Event',
-				'post_status' => 'published',
+				'post_status' => 'publish',
 				'post_type'   => 'event',
 				'meta_input'  => array(
 					'event-start-date' => strtotime( '+10 days 15:00:00' ),
@ -147,7 +147,7 @@ class Test_VS_Event_List extends WP_UnitTestCase {
 		$wp_post_id = wp_insert_post(
 			array(
 				'post_title'  => 'VSEL Test Event',
-				'post_status' => 'published',
+				'post_status' => 'publish',
 				'post_type'   => 'event',
 				'meta_input'  => array(
 					'event-start-date'    => strtotime( '+10 days 15:00:00' ),
@ -182,7 +182,7 @@ class Test_VS_Event_List extends WP_UnitTestCase {
 		$wp_post_id = wp_insert_post(
 			array(
 				'post_title'  => 'VSEL Test Event',
-				'post_status' => 'published',
+				'post_status' => 'publish',
 				'post_type'   => 'event',
 				'meta_input'  => array(
 					'event-start-date'    => strtotime( '+10 days 15:00:00' ),
--- a/tests/test-class-plugin-wp-event-manager.php
+++ b/tests/test-class-plugin-wp-event-manager.php
@ -0,0 +1,182 @@
+<?php
+/**
+ * Class SampleTest
+ *
+ * @package ActivityPub_Event_Bridge
+ */
+
+/**
+ * Sample test case.
+ */
+class Test_WP_Event_Manager extends WP_UnitTestCase {
+	/**
+	 * Override the setup function, so that tests don't run if the Events Calendar is not active.
+	 */
+	public function set_up() {
+		parent::set_up();
+
+		if ( ! function_exists( 'wp_event_manager_notify_new_user' ) ) {
+			self::markTestSkipped( 'WP Event Manager plugin is not active.' );
+		}
+
+		// Make sure that ActivityPub support is enabled for The Events Calendar.
+		$aec = \ActivityPub_Event_Bridge\Setup::get_instance();
+		$aec->activate_activitypub_support_for_active_event_plugins();
+
+		// Delete all posts afterwards.
+		_delete_all_posts();
+	}
+
+	/**
+	 * Test that the right transformer gets applied.
+	 */
+	public function test_transformer_class() {
+		// We only test for one event plugin being active at the same time,
+		// even though we support multiple onces in theory.
+		// But testing all combinations is beyond scope.
+		$active_event_plugins = \ActivityPub_Event_Bridge\Setup::get_instance()->get_active_event_plugins();
+		$this->assertEquals( 1, count( $active_event_plugins ) );
+
+		// Enable ActivityPub support for the event plugin.
+		$this->assertContains( 'event_listing', get_option( 'activitypub_support_post_types' ) );
+
+		// Insert a new Event.
+		$wp_post_id = wp_insert_post(
+			array(
+				'post_title'  => 'WP Event Manager TestEvent',
+				'post_status' => 'publish',
+				'post_type'   => 'event_listing',
+				'meta_input'  => array(
+					'event-start-date' => strtotime( '+10 days 15:00:00' ),
+				),
+			)
+		);
+
+		$wp_object = get_post( $wp_post_id );
+
+		// Call the transformer Factory.
+		$transformer = \Activitypub\Transformer\Factory::get_transformer( $wp_object );
+
+		// Check that we got the right transformer.
+		$this->assertInstanceOf( \ActivityPub_Event_Bridge\Activitypub\Transformer\WP_Event_Manager::class, $transformer );
+	}
+
+	/**
+	 * Test the transformation to ActivityStreams of minimal event.
+	 */
+	public function test_transform_of_minimal_event() {
+		// Insert a new Event.
+		$wp_post_id = wp_insert_post(
+			array(
+				'post_title'   => 'WP Event Manager TestEvent',
+				'post_status'  => 'publish',
+				'post_type'    => 'event_listing',
+				'post_content' => 'Come to my WP Event Manager event!',
+				'meta_input'   => array(
+					'_event_start_date' => strtotime( '+10 days 15:00:00' ),
+				),
+			)
+		);
+
+		// Transform the event to ActivityStreams.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $wp_post_id ) )->to_object()->to_array();
+
+		// Check that the event ActivityStreams representation contains everything as expected.
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'WP Event Manager TestEvent', $event_array['name'] );
+		$this->assertEquals( 'Come to my WP Event Manager event!', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T15:00:00Z', $event_array['startTime'] );
+		$this->assertArrayNotHasKey( 'endTime', $event_array );
+		$this->assertEquals( comments_open( $wp_post_id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $wp_post_id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertEquals( esc_url( get_permalink( $wp_post_id ) ), $event_array['externalParticipationUrl'] );
+		$this->assertArrayNotHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+	}
+
+	/**
+	 * Test the transformation to ActivityStreams of minimal event.
+	 */
+	public function test_transform_of_full_online_event() {
+		// Insert a new Event.
+		$wp_post_id = wp_insert_post(
+			array(
+				'post_title'   => 'WP Event Manager TestEvent',
+				'post_status'  => 'publish',
+				'post_type'    => 'event_listing',
+				'post_content' => 'Come to my WP Event Manager event!',
+				'meta_input'   => array(
+					'_event_start_date' => \gmdate( 'Y-m-d H:i:s', strtotime( '+10 days 15:00:00' ) ),
+					'_event_end_date'   => \gmdate( 'Y-m-d H:i:s', strtotime( '+10 days 16:00:00' ) ),
+					'_event_video_url'  => 'https://event-federation.eu/meeting-room',
+					'_event_online'     => 'yes',
+				),
+			)
+		);
+
+		// Transform the event to ActivityStreams.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $wp_post_id ) )->to_object()->to_array();
+
+		// Check that the event ActivityStreams representation contains everything as expected.
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'WP Event Manager TestEvent', $event_array['name'] );
+		$this->assertEquals( 'Come to my WP Event Manager event!', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T15:00:00Z', $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T16:00:00Z', $event_array['endTime'] );
+		$this->assertEquals( comments_open( $wp_post_id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $wp_post_id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertEquals( true, $event_array['isOnline'] );
+		$this->assertEquals( esc_url( get_permalink( $wp_post_id ) ), $event_array['externalParticipationUrl'] );
+		$this->assertArrayNotHasKey( 'location', $event_array );
+		$this->assertEquals( 'MEETING', $event_array['category'] );
+		$this->assertContains(
+			array(
+				'type'      => 'Link',
+				'name'      => __( 'Video URL', 'activitypub-event-bridge' ),
+				'href'      => 'https://event-federation.eu/meeting-room',
+				'mediaType' => 'text/html',
+			),
+			$event_array['attachment']
+		);
+	}
+
+	/**
+	 * Test the transformation to ActivityStreams of minimal event.
+	 */
+	public function test_transform_of_event_with_location() {
+		// Insert a new Event.
+		$wp_post_id = wp_insert_post(
+			array(
+				'post_title'   => 'WP Event Manager TestEvent',
+				'post_status'  => 'publish',
+				'post_type'    => 'event_listing',
+				'post_content' => 'Come to my WP Event Manager event!',
+				'meta_input'   => array(
+					'_event_start_date' => \gmdate( 'Y-m-d H:i:s', strtotime( '+10 days 15:00:00' ) ),
+					'_event_end_date'   => \gmdate( 'Y-m-d H:i:s', strtotime( '+10 days 16:00:00' ) ),
+					'_event_location'   => 'Some text location',
+					'_event_online'     => 'no',
+				),
+			)
+		);
+
+		// Transform the event to ActivityStreams.
+		$event_array = \Activitypub\Transformer\Factory::get_transformer( get_post( $wp_post_id ) )->to_object()->to_array();
+
+		// Check that the event ActivityStreams representation contains everything as expected.
+		$this->assertEquals( 'Event', $event_array['type'] );
+		$this->assertEquals( 'WP Event Manager TestEvent', $event_array['name'] );
+		$this->assertEquals( 'Come to my WP Event Manager event!', wp_strip_all_tags( $event_array['content'] ) );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T15:00:00Z', $event_array['startTime'] );
+		$this->assertEquals( gmdate( 'Y-m-d', strtotime( '+10 days 15:00:00' ) ) . 'T16:00:00Z', $event_array['endTime'] );
+		$this->assertEquals( comments_open( $wp_post_id ), $event_array['commentsEnabled'] );
+		$this->assertEquals( comments_open( $wp_post_id ) ? 'allow_all' : 'closed', $event_array['repliesModerationOption'] );
+		$this->assertEquals( 'external', $event_array['joinMode'] );
+		$this->assertEquals( false, $event_array['isOnline'] );
+		$this->assertEquals( esc_url( get_permalink( $wp_post_id ) ), $event_array['externalParticipationUrl'] );
+		$this->assertArrayHasKey( 'location', $event_array );
+		$this->assertEquals( 'Some text location', $event_array['location']['address'] );
+	}
+}