WIP suggested fields, additional theming, cron, shortcodes.

assets/squat-radar.css

@@ -1,48 +1,55 @@
-.Squat_radar li.squat-li {
+.squat-radar.radar-event {
 	margin-bottom: 1em;
 	padding-bottom: 1em;
 	border-bottom: 1px solid #ddd;
 	text-align:left;
 }
-	.Squat_radar li.squat-li::after {
+.squat-radar.radar-event::after {
 	content: '';
 	display: block;
 	float: none;
 	clear: both;
-	}
+}
-	.Squat_radar li.squat-li:last-child {
+.squat-radar.rader-event:last-child {
 	border-bottom: 0;
 	padding-bottom: 0;
 	margin-bottom: 0;
-	}
+}
+.squat-radar.radar-event-cancelled {
+	text-decoration: line-through;
+}
 
-.Squat_radar h3.squat-h3 {
+.squat-radar .squat-radar-title {
 	line-height: 1;
 	font-size: 1.4em;
 	margin-bottom: 0.2em;
 }
 
-.Squat_radar p.squat-p {
+.squat-radar .squat-radar-datetime {
-	display: none;
-	text-align:left;
-	margin-bottom: 0.6em;
-}
-
-.Squat_radar span.squat-tijd {
 	font-weight: bold;
-/*	display: block;*/
 }
 
-.Squat_radar a.squat-link {
+.squat-radar .squat-radar-datetime::before {
+	content: '';
+	display: block;
+	float: none;
+	clear: both;
+}
+
+.squat-radar .squat-radar-list li {
+	display: inline;
+}
+
+.squat-radar a.squat-radar-url-more {
 	padding: .4180469716em 1.11575em;
 	margin-left: 10px;
 /*	margin-bottom: 10px;*/
 	float: right;
 }
-.Squat_radar a.squat-link:hover {
+.squat-radar a.squat-radar-url-more:hover {
 	color: white !important;
 }
 
-.Squat_radar a.squat-link:focus {
+.squat_radar a.squat-radar-url-more:focus {
 	outline: 0;
 }

includes/squat-radar-connector.php

@@ -45,7 +45,8 @@ class Squat_Radar_Connector {
 			$query[] = ['facets[' . urlencode($key) . '][]' => urlencode($value)];
 		}
 		if ( ! empty($fields) ) {
-			$query['fields'] = urlencode(implode(',', $fields));
+			// {raw}urlencode is encoding : and , both of which are valid pchar.
+			$query['fields'] = preg_replace('/[^a-z_:,]/', '', implode(',', $fields));
 		}
 		if ( ! empty($language) ) {
 			$query['language'] = urlencode($language);
@@ -57,7 +58,7 @@ class Squat_Radar_Connector {
 	}
 
 	function events( $facets, $fields = [], $language = NULL, $limit = 10, $expiration = 10800, $reset = FALSE ) {
-		$fields = array_merge($fields, ['uuid', 'url']);
+		$fields = array_merge($fields, ['uuid', 'title', 'url', 'event_status']);
 		$transient_key = 'squat_radar_events_' . sha1(implode($facets) . implode($fields) . $language . $limit);
 		if (! $reset && $data = get_transient( $transient_key )) {
 			return $data;

includes/squat-radar-formatter.php

@@ -9,16 +9,21 @@ class Squat_Radar_Formatter {
 		// Filters to turn each individual field into HTML.
 		//
 		// $value is the data from the field and can be an array or string.
+		//
 		// These filters extract data from arrays based on the field structure.
+		// If you make a change it is a requirement to sanitize
+		// anything that will be output. 
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_date_html'], 5, 4);
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_location_html'], 5, 4);
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_link_html'], 5, 4);
-		// field 'url' was turned into a more link, example of an override with more specificity.
+		// Field 'url' was already turned into a <a> link, by field_link_html.
+		// The field_image_html is an example of an override with more specificity.
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_image_html'], 7, 4);
 		// If $value is an array it is flattened into a string here.
 		// If $value != $original it will _not_ be sanitized, assumption is that it has been already.
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_html'], 10, 4);
-		// $value is always a string. These filters just add additional wrapper markup.
+		// $value is always a string from this point.
+		// These filters just add additional wrapper markup.
 		add_filter('squat_radar_field_html', [__CLASS__, 'field_title_html'], 15, 4);
 	}
 
@@ -26,7 +31,8 @@ class Squat_Radar_Formatter {
 
 		$context['event'] = $event;
 		$output = [];
-		$output[] = '<div class="squat-radar radar-event">';
+		$event_status = self::getValue( $event, ['event_status'] );
+		$output[] = '<div class="squat-radar radar-event radar-event-' . $event_status . '">';
 		foreach ($fields as $field) {
 			$field_tree = explode(':', $field);
 			$value = self::getValue($event, $field_tree);
@@ -71,9 +77,10 @@ class Squat_Radar_Formatter {
 				// Repeating events will appear as a new item for each repeat in the feed.
 				$value = $value[0];
 				$output = '<span class="squat-radar-event-start-end">';	
-				$output .= self::field_date_format($value['time_start'], 'start');
+				$output .= self::field_date_format( $value['time_start'], 'start' );
 				if ($value['time_start'] != $value['time_end']) {
-					$output .= self::field_date_format($value['time_end'], 'end');
+					$time_only = ( substr($value['time_start'], 0, 10) == substr($value['time_end'], 0, 10) );
+					$output .= self::field_date_format( $value['time_end'], 'end', $time_only );
 				}
 				$output .= '</span>';
 				return $output;
@@ -97,15 +104,21 @@ class Squat_Radar_Formatter {
 		return $value;
 	}
 
-	private static function field_date_format($time, $start_end) {
+	private static function field_date_format($time, $start_end, $time_only = FALSE) {
 
 		$date_format = get_option('squat_radar_date_format', 'j M Y');
 		$time_format = get_option('squat_radar_time_format', 'H:i');
 
+		// Remove offset to stop time being converted to UTC.
+		$time = substr($time, 0, -6);
+
 		$output = '<span class="squat-radar-datetime squat-radar-datetime-' . $start_end .'">';
+		if ( ! $time_only ) {
 			$output .= '<span class="squat-radar-date">';
 			$output .= date_i18n($date_format, strtotime($time));
-		$output .= '</span> <span class="squat-radar-time">';
+			$output .= '</span> ';
+		}
+		$output .= '<span class="squat-radar-time">';
 		$output .= date_i18n($time_format, strtotime($time));
 		$output .= '</span></span>';
 
@@ -142,11 +155,11 @@ class Squat_Radar_Formatter {
 			case 'map':
 				$output = [];
 				foreach ($value as $map) {
-					if ( is_array($value) && $value['lat'] !== NULL && $value['lon'] !== NULL ) {
+					if ( is_array($map) && $map['lat'] !== NULL && $map['lon'] !== NULL ) {
 						$this_output = '<span class="squat-radar-location squat-radar-location-map-link">';
-						$lat = $value['lat'];
+						$lat = $map['lat'];
-						$lon = $value['lon'];
+						$lon = $map['lon'];
-						$this_output .= "<a href=\"https://www.openstreetmap.org/?mlat=$lat&mlon=$lon#map=12/$lat/$lon\">";
+						$this_output .= "<a href=\"https://www.openstreetmap.org/?mlat=$lat&mlon=$lon#map=14/$lat/$lon\">";
 						$this_output .= __('[Map]', 'squat-radar');
 						$this_output .= '</a></span>';
 						$output[] = $this_output;
@@ -157,19 +170,19 @@ class Squat_Radar_Formatter {
 			case 'address':
 				$output = [];
 				foreach ($value as $address) {
-					if ( is_array($value) ) {
+					if ( is_array($address) ) {
 						$this_address = [];
 						foreach (['name_line', 'thoroughfare', 'locality', 'postal_code', 'country'] as $field_name) {
-							if (! empty($value[$field_name])) {
+							if (! empty($address[$field_name])) {
 								$this_line = '<span class="squat-radar-location-' . $field_name . '">';
-								$this_line .= sanitize_text_field($value[$field_name]);
+								$this_line .= sanitize_text_field($address[$field_name]);
 								$this_line .= '</span>';
 								$this_address[] = $this_line;
 							}
 						}
 						
 						$this_output = '<span class="squat-radar-location squat-radar-location-address">';
-						$this_output .= implode(' ,', $this_address);
+						$this_output .= implode(', ', $this_address);
 						$this_output .= '</span>';
 						$output[] = $this_output;
 					}
@@ -184,19 +197,19 @@ class Squat_Radar_Formatter {
  	 * Item Radar links implementation of 'squat_radar_field_html' filter.
 	 */
 	function field_link_html($value, $original, $field, $context) {
-		if ($field[0] == 'title' && ! empty($context['event']['url'])) {
+		if ( ($field[0] == 'title' || $field[0] == 'title_field') && ! empty($context['event']['url'])) {
 			return '<a href="' . esc_url($context['event']['url']) . '" class="squat-radar-url squat-radar-url-title">' . sanitize_text_field( $value ) . '</a>';
 		}
 	
 		if ($field[0] == 'url' && count($field) == 1) {
 			return '<a href="' . esc_url_raw($value) . '" class="squat-radar-url squat-radar-url-more">' . __('more…', 'squat-radar') . '</a>';
 		}
-
+		elseif ($field[0] == 'url') {
-		if ($field[0] == 'url') {
-			array_shift($field);
-			$field_tree = array_reverse($field);
-			$sibling_fields = self::getValue($event, $field_tree);
 			$title = esc_url($value);
+			array_shift($field);
+			if (is_array($field)) {
+				$field_tree = array_reverse($field);
+				$sibling_fields = self::getValue($context['event'], $field_tree);
 				$class = 'squat-radar-url-link';
 				if (! empty($sibling_fields['title']) ) {
 					$title = sanitize_text_field( $sibling_fields['title']);
@@ -206,6 +219,7 @@ class Squat_Radar_Formatter {
 					$title = sanitize_text_field( $sibling_fields['name']);
 					$class = 'squat-radar-url-name';
 				}
+			}
 			return '<a href="' . esc_url_raw($value) . '" class="squat-radar-url ' . $class . '">' . $title . '</a>';
 		}	
 		

includes/squat-radar-instance.php

@@ -29,11 +29,10 @@ class Squat_Radar_Instance {
 		include SQUAT_RADAR_DIR . 'includes/squat-radar-connector.php';
 		include SQUAT_RADAR_DIR . 'includes/squat-radar-formatter.php';
 
-		add_shortcode( 'squat_radar_sidebar', array($this, 'print_sidebar') );
+		add_shortcode( 'squat_radar_sidebar', [$this, 'print_sidebar'] );
-		// add_shortcode( 'squat_radar_widget', array( $this, 'shortcode' ) );
+		add_action( 'plugins_loaded', [$this, 'i18n'], 5 );
-		add_action( 'plugins_loaded', array( $this, 'i18n' ), 5 );
+		add_action( 'widgets_init', [ $this, 'add_sidebar'], 20 );
-		add_action( 'widgets_init', array( $this, 'add_sidebar' ), 20 );
+		add_action( 'widgets_init', ['Squat_Radar_Widget', 'register_widget'] );
-		add_action( 'widgets_init', array('Squat_Radar_Widget', 'register_widget') );
 
 		Squat_Radar_Formatter::register();
 	}
@@ -47,25 +46,11 @@ class Squat_Radar_Instance {
 		load_plugin_textdomain( 'squat-radar', false, '/languages' );
 	}
 
-	/**
-	 * output a widget using 'widget' shortcode.
-	 *
-	 * Requires the widget ID.
-	 * You can overwrite widget args: before_widget, before_title, after_title, after_widget
-	 *
-	 * @example [widget id="text-1"]
-	 * @since 0.1
-	 */
-	public function shortcode( $atts, $content = null ) {
-		$atts['echo'] = false;
-		return $this->do_widget( $atts );
-	}
-
 	function print_sidebar() {
 		ob_start();
 
-		if (is_active_sidebar('squat_widget_gebied')) {
+		if (is_active_sidebar('squat_radar_widget_shortcode')) {
-			dynamic_sidebar('squat_widget_gebied');
+			dynamic_sidebar('squat_radar_widget_shortcode');
 		}
 
 		return ob_get_clean();
@@ -75,15 +60,15 @@ class Squat_Radar_Instance {
 
 	function add_sidebar() {
 
-		register_sidebar(array(
+		register_sidebar([
 			'name'          => __( 'Squat Radar Shortcodes'),
-			'description'=> __( 'This widget area is not by default displayed on frontend. It can be displayed with all its widgets with the [squat_radar] shortcode.', 'squat-radar' ),
+			'description'=> __( 'This widget area is not by default displayed on frontend. It can be displayed with all its widgets with the [squat_radar] shortcode; or used to hold active widgets displayed with their own [squat_radar_widget id="X"] shortcode, see instructions on widget configuration for the id.', 'squat-radar' ),
 			'id'            => 'squat_radar_widget_shortcode',
 			'before_widget' => '<div class="widget %2$s">',
 			'after_widget'  => '</div>',
 			'before_title'  => '<h3 class="widget-title">',
 			'after_title'   => '</h3>',
-		));
+		]);
 
 	}
 

includes/squat-radar-widget.php

@@ -23,6 +23,11 @@ class Squat_Radar_Widget extends WP_Widget {
 		add_action( 'wp_ajax_nopriv_squat_radar_events', [__CLASS__, 'ajax_callback'] );
 		add_action( 'wp_enqueue_scripts', [__CLASS__, 'widget_script'] );
 		add_action( 'wp_enqueue_style', [__CLASS__, 'widget_style'] );
+
+		add_shortcode( 'squat_radar_widget', [__CLASS__, 'shortcode' ] );
+
+		add_action( 'squat_radar_widget_cache_cron', [__CLASS__, 'cache_cron'] );
+		add_option( 'squat_radar_widget_cron_run', []);
 	}
 
 	static public function widget_style() {
@@ -33,13 +38,69 @@ class Squat_Radar_Widget extends WP_Widget {
     		wp_register_script( 'squat-radar-widget',  SQUAT_RADAR_URL . '/assets/squat-radar.js', ['jquery'] );
 	}
 
+	/**
+	 * Output a widget using 'squat_radar_widget' shortcode.
+	 *
+	 * Requires the widget ID.
+	 *
+	 * @example [squat_radar_widget id="1"]
+	 */
+	static public function shortcode( $attributes, $content = '' ) {
+		$defaults = [
+			'id' => '__i__',
+		];
+		$attributes = shortcode_atts($defaults, $attributes, 'squat_radar_widget');
+
+		// Return early if ID is unknown.
+		$option = get_option( 'widget_squat_radar' );
+		if (! isset( $option[$attributes['id']] )) {
+			if ( current_user_can( 'administrator' ) ) {
+				$content = '<span class="error">' . __('Squat Radar Widget shortcode ID not recognised. Check the suggestion at the top of the widget in the adminstration interface.', 'squat-radar') . '</span>';
+			}	
+			return $content;
+                }
+
+		$instance = $option[$attributes['id']];
+		// render the widget
+		ob_start();
+		// To allow overriding the args here? For before after etc.
+		the_widget( __CLASS__, $instance);
+		$content = ob_get_clean();
+
+		return $content;
+	}
+
+	public static function cache_cron() {
+		$now = time();
+		$last_run = get_option('squat_radar_widget_cron_run', []);
+		foreach (self::cron_instances() as $number => $instance) {
+			if (! isset($last_run[$number]) || $last_run[$number] + $instance['cache_expire'] < $now ) {
+				if (self::cache_refresh($instance)) {
+					$last_run[$number] = $now; 
+				}
+			}
+		}
+		set_option('squat_radar_widget_cron_run', $last_run);
+	}
+
+	protected static function cache_refresh($instance) {
+		$connector = new Squat_Radar_Connector();
+
+		// @todo Languages...
+		try {
+			$data = $connector->events($instance['url']['keys']['facets'], $instance['fields'], $language, $instance['limit'], 0, TRUE );
+		}
+		catch ( Squat_Radar_Connector_Exception $e ) {
+			return FALSE;
+		}
+
+		return TRUE;
+	}
+
+
 	public function widget( $args, $instance ) {
 		wp_enqueue_style( 'squat-radar-widget' );
-		wp_enqueue_script( 'squat-radar-widget');
-		wp_localize_script( 'squat-radar-widget', 'squat_radar_widget', [ 'ajaxurl' => admin_url( 'admin-ajax.php' ) ] );
-		// Seems non-trivial to send (potentially) multiple values for different widget instances appending an array/hash.
 		$widget_id = 'squat_radar_widget_' . $this->number; 
-		wp_localize_script( 'squat-radar-widget', $widget_id, $instance );
 		
 		echo $args['before_widget'];
 
@@ -47,9 +108,28 @@ class Squat_Radar_Widget extends WP_Widget {
 			echo $args['before_title'] . apply_filters( 'widget_title', $instance['title'] ) . $args['after_title'];
 		}
 
+		if ( ! empty($instance['use_cron']) ) {
+			try {
+				echo self::instance_events_html($instance);
+			}
+			catch ( Squat_Radar_Connector_Exception $e ) {
+				if ( current_user_can( 'administrator' ) ) {
+					echo $e->getCode() . ': ' . $e->getMessage();
+				}
+				echo '<div id="' . $widget_id . '" class="squat-radar-widget"><a href="' . esc_url_raw( $instance['url']['value'] ) . '">'
+					. esc_url( $instance['url']['value'] ) 
+					. '</a></div>';
+			}
+		}
+		else {
+			wp_enqueue_script( 'squat-radar-widget');
+			wp_localize_script( 'squat-radar-widget', 'squat_radar_widget', [ 'ajaxurl' => admin_url( 'admin-ajax.php' ) ] );
+			wp_localize_script( 'squat-radar-widget', $widget_id, $instance );
+
 			echo '<div id="' . $widget_id . '" class="squat-radar-widget squat-radar-ajax"><a href="' . esc_url_raw( $instance['url']['value'] ) . '">'
 				. esc_url( $instance['url']['value'] ) 
 				. '</a></div>';
+		}
 
 		echo $args['after_widget'];
 	}
@@ -59,11 +139,10 @@ class Squat_Radar_Widget extends WP_Widget {
 			wp_die();
 		}
 
+		$data = [];
 		$instance = $_POST['instance'];
-		$language = defined('ICL_LANGUAGE_CODE') ? ICL_LANGUAGE_CODE : $instance['url']['keys']['language'];
-		$connector = new Squat_Radar_Connector();
 		try {
-			$data = $connector->events($instance['url']['keys']['facets'], $instance['fields'], $language, $instance['limit'], $instance['cache_expire'], TRUE );
+			$data['html'] = self::instance_events_html($instance);
 		}
 		catch ( Squat_Radar_Connector_Exception $e ) {
 			$data = ['is_error' => TRUE];
@@ -71,20 +150,26 @@ class Squat_Radar_Widget extends WP_Widget {
 				$data['error']['code'] = $e->getCode();
 				$data['error']['message'] = $e->getMessage();
 			}
+		}
+
 		wp_send_json($data);
 	}
 
+	public static function instance_events_html($instance) {
+		$language = defined('ICL_LANGUAGE_CODE') ? ICL_LANGUAGE_CODE : $instance['url']['keys']['language'];
+		$connector = new Squat_Radar_Connector();
+		$data = $connector->events($instance['url']['keys']['facets'], $instance['fields'], $language, $instance['limit'], $instance['cache_expire'], TRUE );
 		$html = '';
 		foreach ($data['result'] as $id => $event) {
 			$output = apply_filters( 'squat_radar_format_event', $event, $instance['fields'], ['instance' => $instance] );
-			$html .= implode($output);
+			$html .= implode(' ', $output);
 		}
-		$data['html'] = $html;
 
-		wp_send_json($data);
+		return $html;
 	}
 
 	public function form( $instance ) {
+
 		//
 		// Introduction.
 		//
@@ -159,6 +244,25 @@ class Squat_Radar_Widget extends WP_Widget {
 
 		}
 
+		echo '<hr>';
+		echo '<fieldset>';
+		echo '<legend>' . __('Fields', 'squat-radar') . '</legend>';
+		echo '<p>';
+		foreach ($this->preset_fields() as $api_field_name => $field_label) {
+			$field_id = esc_attr( $this->get_field_id( 'field-' . $api_field_name ) );
+			$field_name =  esc_attr( $this->get_field_name( 'field-' . $api_field_name ) ); 
+			$field_label = esc_attr( $field_label );
+			$checked = '';
+			if ( isset($instance['fields'][$api_field_name]) ) {
+				unset($instance['fields'][$api_field_name]);
+				$checked = ' checked="checked"';
+			}
+			echo "<input type=\"checkbox\" class=\"checkbox\" id=\"$field_id\" name=\"$field_name\"$checked />";
+			echo "<label for=\"$field_id\">$field_label</label><br />";
+		}
+		echo '</p>';
+		echo '</fieldset>';
+
 		// ADVANCED
 		echo '<hr>';
 		echo '<fieldset>';
@@ -168,14 +272,14 @@ class Squat_Radar_Widget extends WP_Widget {
 		//
 		$field_id = esc_attr( $this->get_field_id( 'fields' ) );
 		$field_name =  esc_attr( $this->get_field_name( 'fields' ) ); 
-		$field_label = esc_attr( 'Fields:', 'squat-radar' );
+		$field_label = esc_attr( 'Additional fields:', 'squat-radar' );
-		$field_value = empty( $instance['fields'] ) ? '' : esc_attr( implode( ' ,', $instance['fields'] ) );
+		$field_value = empty( $instance['fields'] ) ? '' : esc_attr( implode( ', ', $instance['fields'] ) );
 		$field_class = 'widefat';
 		echo "<p>";
 		echo "<label for=\"$field_id\">$field_label</label>";
 		echo "<input class=\"$field_class\" id=\"$field_id\" name=\"$field_name\" type=\"text\" value=\"$field_value\">";
 		echo "</p>";
-		echo '<div class="description">' . __('A list of fields to display. Presently these are API names, hence advanced field. Examples: title, body, topic, category, date_time, image, flyer, tags, offline:map') . '</div>';
+		echo '<div class="description">' . __('A comma seperated list of field API names. Examples: phone, price, flyer, offline:address:thoroughfare. Some fields might need an additonal filter to format them properly. Can also be used instead of checkboxes to define the order fields are displayed in.') . '</div>';
 
 		//
 		// Cache expiry.
@@ -195,6 +299,15 @@ class Squat_Radar_Widget extends WP_Widget {
 		echo "</p>";
 		echo '<div class="description">' . __('Length of time the cache of events will be kept. Longer faster, but updated less often.') . '</div>';
 		
+		$field_id = esc_attr( $this->get_field_id( 'use_cron' ) );
+		$field_name =  esc_attr( $this->get_field_name( 'use_cron' ) ); 
+		$field_label = esc_attr__( 'Use cron' );
+		$use_cron = isset($instance['use_cron']) ? (bool) $instance['use_cron'] : false;
+		$checked = checked( $use_cron, TRUE, FALSE );
+		echo "<input type=\"checkbox\" class=\"checkbox\" id=\"$field_id\" name=\"$field_name\"$checked />";
+		echo "<label for=\"$field_id\">$field_label</label><br />";
+		echo '<div class="description">' . __('Do not use AJAX, but always display the cached version of the events. Update the cache after the expiry length using cron. Works best if you have a regular external cronjob running.') . '</div>';
+
 		echo '</fieldset>';
 
 	}
@@ -202,7 +315,6 @@ class Squat_Radar_Widget extends WP_Widget {
 
 	public function update( $new_instance, $old_instance ) {
 		$options = [];
-		$options['debug'] = $new_instance;
 
 		if ( ! empty( $new_instance['title'] ) ) {
 			$options['title'] = sanitize_text_field( $new_instance['title'] );
@@ -223,13 +335,17 @@ class Squat_Radar_Widget extends WP_Widget {
 			$options['url'] = ['value' => '', 'keys' => []];
 		}
 
+		$options['fields'] = [];
+		foreach ($this->preset_fields() as $field_name => $field_label) {
+			if ( ! empty($new_instance['field-' . $field_name]) ) {
+				$options['fields'][$field_name] = $field_name;
+			}
+		}
+
 		if ( ! empty($new_instance['fields']) ) {
 			$matches = [];
 			preg_match_all('/([a-zA-Z_:]+)/', $new_instance['fields'], $matches);
-			$options['fields'] = $matches[0];
+			$options['fields'] += array_combine($matches[0], $matches[0]);
-		}
-		else {
-			$options['fields'] = [];
 		}
 
 		if ( ! empty( $new_instance['limit'] ) ) {
@@ -243,8 +359,54 @@ class Squat_Radar_Widget extends WP_Widget {
 			$options['cache_expire'] = 10800;
 		}
 
+		if ( empty( $new_instance['use_cron'] ))  {
+			$options['use_cron'] = FALSE;
+			$cron_instances = self::cron_instances();
+			unset($cron_instances[$this->number]);
+			if ( empty($cron_instances) && ($timestamp = wp_next_scheduled( 'squat_radar_widget_cache_cron' ) )) {
+				wp_unschedule_event( $timestamp, 'squat_radar_widget_cache_cron' );
+			}
+		}
+		else {
+			$options['use_cron'] = TRUE;
+			cache_refresh($options);
+			if ( ! wp_next_scheduled( 'squat_radar_widget_cache_cron' ) ) {
+				    wp_schedule_event( time() + $options['cache_expire'], 'hourly', 'squat_radar_widget_cache_cron');
+			}
+		}
+
 		return $options;
 	}
 
-}
+	public function preset_fields() {
+		return [
+			'title_field' => __( 'Title' ),
+			'event_status' => __( 'Event status (proposed, or cancelled)' ),
+			'date_time' => __( 'Date and Time (start and optional end)' ),
+			'date_time:time_start' => __( 'Date and Time (start only)' ),
+			'body' => __( 'Body' ),
+			'category' => __( 'Categories' ),
+			'topic' => __( 'Tags' ),
+			'offline:address' => __( 'Address' ),
+			'offline:map' => __( 'Map (link)' ),
+			'og_group_ref' => __( 'Groups' ),
+			'price_category' => __( 'Price category' ),
+			'image:file:url' => __( 'Image' ),
+			'link' => __( 'Event URL (entered not Radar)' ),
+			'url' => __( 'More link (to event on Radar)' ),
+		];
+	}
 
+	public static function cron_instances() {
+		$cron_instances = [];
+		$instances = get_option( 'widget_squat_radar' );
+		foreach ($instances as $number => $instance) {
+			if (! empty($instance['use_cron']) ) {
+				$cron_instances[$number] = $instance;
+			}
+		}
+
+		return $cron_instances;
+	}
+
+}