Refactor widgets

All widgets use new form/builder class and updater class.
Also fixes function visibility issues, defaults.

includes/widgets/class-displayfeaturedimagegenesis-widgets-update.php

@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * Class DisplayFeaturedImageGenesisWidgetsUpdate
+ */
+class DisplayFeaturedImageGenesisWidgetsUpdate {
+	/**
+	 * Update a particular instance.
+	 *
+	 * This function should check that $new_instance is set correctly.
+	 * The newly calculated value of $instance should be returned.
+	 * If "false" is returned, the instance won't be saved/updated.
+	 *
+	 * @since 2.7.0
+	 *
+	 * @param array $new_instance New settings for this instance as input by the user via form()
+	 * @param $old_instance
+	 * @param $fields
+	 *
+	 * @return array Settings to save or bool false to cancel saving
+	 */
+	public function update( $new_instance, $old_instance, $fields ) {
+		foreach ( $fields as $field ) {
+			$value = $field['args']['id'];
+			if ( ! isset( $new_instance[ $value ] ) ) {
+				continue;
+			}
+			switch ( $field['method'] ) {
+				// Sanitize numbers
+				case 'number':
+					$new_instance[ $value ] = $new_instance[ $value ] ? absint( $new_instance[ $value ] ) : '';
+					break;
+
+				// Sanitize checkboxes
+				case 'checkbox':
+					$new_instance[ $value ] = (int) (bool) $new_instance[ $value ];
+					break;
+
+				// Sanitize text fields
+				case 'text':
+					$new_instance[ $value ] = strip_tags( $new_instance[ $value ] );
+					break;
+
+				// Escape select options
+				case 'select':
+					$new_instance[ $value ] = is_numeric( $new_instance[ $value ] ) ? (int) $new_instance[ $value ] : esc_attr( $new_instance[ $value ] );
+					break;
+
+				case 'textarea':
+					if ( function_exists( 'sanitize_textarea_field' ) ) {
+						$new_instance[ $value ] = sanitize_textarea_field( $new_instance[ $value ] );
+					} else {
+						$new_instance[ $value ] = esc_textarea( $new_instance[ $value ] );
+					}
+					break;
+
+				// Default
+				default:
+					$new_instance[ $value ] = esc_attr( $new_instance[ $value ] );
+					break;
+			}
+		} // End foreach().
+
+		// Title is never included in the fields.
+		$new_instance['title'] = strip_tags( $new_instance['title'] );
+
+		return $new_instance;
+
+	}
+}