Shortcode: Fix the youtube url cannot be embedded due to the trailing…

… question mark of the youtube id (#39309)

* Shortcode: Fix the youtube url cannot be embeded due to the trailing question mark of the youtube id

* changelog

* Add tests

* Update projects/plugins/jetpack/tests/php/modules/shortcodes/test-class.youtube.php

---------

Co-authored-by: Jeremy Herve <jeremy@jeremy.hu>

projects/plugins/jetpack/changelog/fix-youtube-embed-trailing-question-mark

@@ -0,0 +1,4 @@
+Significance: patch
+Type: bugfix
+
+Shortcode: Fix the youtube url cannot be embeded due to the trailing question mark of the youtube id

projects/plugins/jetpack/modules/shortcodes/youtube.php

@@ -548,6 +548,42 @@ function wpcom_youtube_embed_crazy_url_init() {
 	wp_embed_register_handler( 'wpcom_youtube_embed_crazy_url', '#https?://(?:www\.)?(?:youtube.com/(?:v/|playlist|watch[/\#?])|youtu\.be/).*#i', 'wpcom_youtube_embed_crazy_url' );
 }
 
+/**
+ * Remove the ending question mark from the video id of the YouTube URL.
+ *
+ * Example: https://www.youtube.com/watch?v=AVAWwXeOyyQ?
+ *
+ * @since $$next-version$$
+ *
+ * @param string $provider URL of the oEmbed provider.
+ * @param string $url      URL of the content to be embedded.
+ *
+ * @return string
+ */
+function wpcom_youtube_oembed_fetch_url( $provider, $url ) {
+	if ( ! wp_startswith( $provider, 'https://www.youtube.com/oembed' ) ) {
+		return $provider;
+	}
+
+	$parsed = wp_parse_url( $url );
+	if ( ! isset( $parsed['query'] ) ) {
+		return $provider;
+	}
+
+	$query_vars = array();
+	wp_parse_str( $parsed['query'], $query_vars );
+	if ( isset( $query_vars['v'] ) && wp_endswith( $query_vars['v'], '?' ) ) {
+		$url = remove_query_arg( array( 'v' ), $url );
+		$url = add_query_arg( 'v', preg_replace( '/\?$/', '', $query_vars['v'] ), $url );
+	}
+
+	$provider = remove_query_arg( array( 'url' ), $provider );
+	$provider = add_query_arg( 'url', rawurlencode( $url ), $provider );
+
+	return $provider;
+}
+add_filter( 'oembed_fetch_url', 'wpcom_youtube_oembed_fetch_url', 10, 2 );
+
 if (
 	! is_admin()
 	/**

projects/plugins/jetpack/tests/php/modules/shortcodes/test-class.youtube.php

@@ -299,4 +299,47 @@ public function test_jetpack_shortcode_youtube_dimensions( $query_args, $expecte
 		$GLOBALS['content_width'] = self::CONTENT_WIDTH;
 		$this->assertEquals( $expected, jetpack_shortcode_youtube_dimensions( $query_args ) );
 	}
+
+	/**
+	 * List of variation of YouTube embed URLs.
+	 */
+	public function get_youtube_urls() {
+		return array(
+			'valid_url'                          => array(
+				'https://www.youtube.com/watch?v=SVRiktFlWxI',
+				'https://www.youtube.com/watch?v=SVRiktFlWxI',
+			),
+			'short_youtube_url'                  => array(
+				'https://youtu.be/gS6_xOABTWo',
+				'https://youtu.be/gS6_xOABTWo',
+			),
+			'video_id_ending_with_question_mark' => array(
+				'https://www.youtube.com/watch?v=WVbQ-oro7FQ?',
+				'https://www.youtube.com/watch?v=WVbQ-oro7FQ',
+			),
+		);
+	}
+
+	/**
+	 * Test different oEmbed URLs and their output.
+	 *
+	 * @covers ::wpcom_youtube_oembed_fetch_url
+	 * @dataProvider get_youtube_urls
+	 *
+	 * @param string $original The original YouTube provider URL.
+	 * @param string $expected The final YouTube provider URL after wpcom_youtube_oembed_fetch_url.
+	 */
+	public function test_youtube_oembed_fetch_url( $original, $expected ) {
+		$provider_url = apply_filters(
+			'oembed_fetch_url',
+			'https://www.youtube.com/oembed?url=' . rawurlencode( $original ),
+			$original,
+			''
+		);
+
+		$this->assertEquals(
+			$provider_url,
+			'https://www.youtube.com/oembed?url=' . rawurlencode( $expected )
+		);
+	}
 }