Add option to enable sermon series image fallback in the feed

Closes #92

includes/admin/settings/class-sm-settings-podcast.php

@@ -202,6 +202,14 @@ public function get_settings() {
 				'desc'        => 'URL to use for the Overcast link in the <code>[list_podcasts]</code> shortcode.  Shortcode key to include/exclude: <code>overcast</code>.',
 				'desc_tip'    => 'Leave empty to disable.',
 			),
+			array(
+				'title'    => __( 'Sermon Image', 'sermon-manager-for-wordpress' ),
+				'type'     => 'checkbox',
+				'id'       => 'podcast_sermon_image_series',
+				'desc'     => __( 'Fallback to series image if sermon does not have its own image.', 'sermon-manager-for-wordpress' ),
+				'desc_tip' => __( 'Default disabled.', 'sermon-manager-for-wordpress' ),
+				'default'  => 'no',
+			),
 
 			array(
 				'type' => 'sectionend',

readme.txt

@@ -105,6 +105,7 @@ Visit the [plugin homepage](https://wpforchurch.com/wordpress-plugins/sermon-man
 ## Changelog ##
 ### 2.15.3 ###
 * New: Add option to disable "views" count for editors and admins
+* New: Add option to enable sermon series image fallback in the feed
 * Fix: Podcast shortcode SVG icons not working in Firefox
 * Fix: Getting 404 on filtering
 * Fix: Sermon Manager errors out when output buffering is disabled

views/wpfc-podcast-feed.php

@@ -174,7 +174,7 @@
 				$speaker         = $speakers_terms ? $speakers_terms[0]->name : '';
 				$series          = strip_tags( get_the_term_list( $post->ID, 'wpfc_sermon_series', '', ', ', '' ) );
 				$topics          = strip_tags( get_the_term_list( $post->ID, 'wpfc_sermon_topics', '', ', ', '' ) );
-				$post_image      = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'large' );
+				$post_image      = get_sermon_image_url( SermonManager::getOption( 'podcast_sermon_image_series' ) );
 				$post_image      = str_ireplace( 'https://', 'http://', ! empty( $post_image['0'] ) ? $post_image['0'] : '' );
 				$audio_duration  = get_post_meta( $post->ID, '_wpfc_sermon_duration', true ) ?: '0:00';
 				$audio_file_size = get_post_meta( $post->ID, '_wpfc_sermon_size', 'true' ) ?: 0;