From 2449603682c395dd8c8f0c9878bdaef6d16eb50a Mon Sep 17 00:00:00 2001
From: Erick Hitter <git-contrib@ethitter.com>
Date: Sun, 17 Jul 2022 15:54:31 -0700
Subject: [PATCH] Add oEmbed support
---
inc/class-plugin.php | 91 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 90 insertions(+), 1 deletion(-)
diff --git a/inc/class-plugin.php b/inc/class-plugin.php
index 461c552..84c65fc 100644
--- a/inc/class-plugin.php
+++ b/inc/class-plugin.php
@@ -11,6 +11,27 @@ namespace ETH_Embed_Anchor_FM;
* Class Plugin.
*/
class Plugin {
+ /**
+ * Regex pattern to match URL to be oEmbedded.
+ *
+ * @var string
+ */
+ private const OEMBED_FORMAT = '#^https://anchor\.fm/(?!api)([^/]+)/episodes/([^/\s]+)/?#i';
+
+ /**
+ * Anchor oEmbed endpoint with placeholder.
+ *
+ * @var string
+ */
+ private const OEMBED_ENDPOINT = 'https://anchor.fm/api/v3/episodes/__EPISODE_ID__/oembed';
+
+ /**
+ * Placeholder in self::OEMBED_ENDPOINT to be replaced with episode ID.
+ *
+ * @var string
+ */
+ private const EPISODE_ID_PLACEHOLDER = '__EPISODE_ID__';
+
/**
* Singleton.
*
@@ -43,7 +64,75 @@ class Plugin {
* @return void
*/
private function setup(): void {
- // TODO: add oEmbed handler.
+ add_action( 'init', [ $this, 'action_init' ] );
+ add_filter(
+ 'oembed_fetch_url',
+ [ $this, 'filter_oembed_fetch_url' ],
+ 10,
+ 3
+ );
+
// TODO: add shortcode.
}
+
+ /**
+ * Register oEmbed handler.
+ *
+ * @return void
+ */
+ public function action_init(): void {
+ wp_oembed_add_provider(
+ self::OEMBED_FORMAT,
+ self::OEMBED_ENDPOINT,
+ true
+ );
+ }
+
+ /**
+ * Filter oEmbed URL.
+ *
+ * Anchor.fm's oEmbed endpoint is specific to an episode ID, which must be
+ * extracted from the episode URL.
+ *
+ * @param string $provider URL of the oEmbed provider.
+ * @param string $url URL of the content to be embedded.
+ * @param array $args Optional. Additional arguments for retrieving
+ * embed HTML.
+ * @return string
+ */
+ public function filter_oembed_fetch_url(
+ string $provider,
+ string $url,
+ array $args = []
+ ): string {
+ if ( 0 !== stripos( $provider, self::OEMBED_ENDPOINT ) ) {
+ return $provider;
+ }
+
+ if ( ! preg_match( self::OEMBED_FORMAT, $url, $matches ) ) {
+ return '';
+ }
+
+ $episode_slug_parts = explode( '-', $matches[2] );
+ $id = array_pop( $episode_slug_parts );
+
+ $provider = str_replace(
+ self::EPISODE_ID_PLACEHOLDER,
+ $id,
+ self::OEMBED_ENDPOINT
+ );
+
+ // Anchor.fm's oEmbed endpoint offers limited support for arguments.
+ if ( isset( $args['width'], $args['height'] ) ) {
+ $provider = add_query_arg(
+ [
+ 'maxwidth' => (int) $args['width'],
+ 'maxheight' => (int) $args['height'],
+ ],
+ $provider
+ );
+ }
+
+ return $provider;
+ }
}
--
GitLab