Add setting to use term/cpt images as fallbacks for archive thumbnails

includes/class-displayfeaturedimagegenesis-helper.php

@@ -85,10 +85,11 @@ class Display_Featured_Image_Genesis_Helper {
 	 * @since  2.3.0
 	 */
 	public function do_checkbox( $args ) {
+		$setting = isset( $this->displaysetting[ $args['setting'] ] ) ? $this->displaysetting[ $args['setting'] ] : 0;
 		printf( '<input type="hidden" name="displayfeaturedimagegenesis[%s]" value="0" />', esc_attr( $args['setting'] ) );
 		printf( '<label for="displayfeaturedimagegenesis[%1$s]"><input type="checkbox" name="displayfeaturedimagegenesis[%1$s]" id="displayfeaturedimagegenesis[%1$s]" value="1" %2$s class="code" />%3$s</label>',
 			esc_attr( $args['setting'] ),
-			checked( 1, esc_attr( $this->displaysetting[ $args['setting'] ] ), false ),
+			checked( 1, esc_attr( $setting ), false ),
 			esc_attr( $args['label'] )
 		);
 		$this->do_description( $args['setting'] );

includes/class-displayfeaturedimagegenesis-output.php

@@ -354,4 +354,38 @@ class Display_Featured_Image_Genesis_Output {
 		}
 		return false;
 	}
+
+	/**
+	 * If there is no image to use for the post thumbnail in archives,
+	 * optionally use the term or post type image as a fallback instead.
+	 *
+	 * @param $defaults
+	 *
+	 * @return mixed
+	 * @since 2.5.0
+	 */
+	public function change_thumbnail_fallback( $defaults ) {
+		if ( ! isset( $this->displaysetting['thumbnails'] ) || ! $this->displaysetting['thumbnails'] ) {
+			return $defaults;
+		}
+		remove_action( 'genesis_entry_content', 'display_featured_image_genesis_add_archive_thumbnails', 5 );
+		$args            = array(
+			'post_mime_type' => 'image',
+			'post_parent'    => get_the_ID(),
+			'post_type'      => 'attachment',
+		);
+		$attached_images = get_children( $args );
+		if ( $attached_images ) {
+			return $defaults;
+		}
+		$image_id = display_featured_image_genesis_get_term_image_id();
+		if ( empty( $image_id ) ) {
+			$image_id = display_featured_image_genesis_get_cpt_image_id();
+		}
+		if ( $image_id ) {
+			$defaults['fallback'] = $image_id;
+		}
+
+		return $defaults;
+	}
 }

includes/class-displayfeaturedimagegenesis-settings.php

@@ -100,6 +100,7 @@ class Display_Featured_Image_Genesis_Settings extends Display_Featured_Image_Gen
 			'move_excerpts' => 0,
 			'is_paged'      => 0,
 			'feed_image'    => 0,
+			'thumbnails'    => 0,
 		);
 
 		return get_option( 'displayfeaturedimagegenesis', $defaults );
@@ -198,6 +199,13 @@ class Display_Featured_Image_Genesis_Settings extends Display_Featured_Image_Gen
 				'section'  => 'main',
 				'args'     => array( 'setting' => 'feed_image', 'label' => __( 'Optionally, add the featured image to your RSS feed.', 'display-featured-image-genesis' ) ),
 			),
+			array(
+				'id'       => 'thumbnails',
+				'title'    => __( 'Archive Thumbnails?', 'display-featured-image-genesis' ),
+				'callback' => 'do_checkbox',
+				'section'  => 'main',
+				'args'     => array( 'setting' => 'thumbnails', 'label' => __( 'Use term/post type fallback images for content archives?', 'display-featured-image-genesis' ) ),
+			),
 		);
 
 		if ( $this->post_types ) {

includes/class-displayfeaturedimagegenesis.php

@@ -111,6 +111,7 @@ class Display_Featured_Image_Genesis {
 		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
 		add_filter( 'plugin_action_links_' . DISPLAYFEATUREDIMAGEGENESIS_BASENAME, array( $this, 'add_settings_link' ) );
 		add_filter( 'displayfeaturedimagegenesis_get_setting', array( $this->settings, 'get_display_setting' ) );
+		add_filter( 'genesis_get_image_default_args', array( $this->output, 'change_thumbnail_fallback' ) );
 
 	}