Fix render chart issue when creating first time chart Codeinwp/visualizer-pro#316

Author: girishpanchal30

classes/Visualizer/Module.php

@@ -742,14 +742,16 @@ public static function get_chart_data( $chart, $type, $run_filter = true ) {
 		// change HTML entities
 		$data = unserialize( html_entity_decode( htmlentities( $chart->post_content ) ) );
 		$altered = array();
-		foreach ( $data as $index => $array ) {
-			if ( ! is_array( $index ) && is_array( $array ) ) {
-				foreach ( $array as &$datum ) {
-					if ( is_string( $datum ) ) {
-						$datum = stripslashes( $datum );
+		if ( ! empty( $data ) ) {
+			foreach ( $data as $index => $array ) {
+				if ( ! is_array( $index ) && is_array( $array ) ) {
+					foreach ( $array as &$datum ) {
+						if ( is_string( $datum ) ) {
+							$datum = stripslashes( $datum );
+						}
 					}
+					$altered[ $index ] = $array;
 				}
-				$altered[ $index ] = $array;
 			}
 		}
 		// if something goes wrong and the end result is empty, be safe and use the original data

classes/Visualizer/Module/Chart.php

@@ -1137,6 +1137,7 @@ public function uploadData() {
 					$chart->post_content = $content;
 				}
 				wp_update_post( $chart->to_array() );
+
 				update_post_meta( $chart->ID, Visualizer_Plugin::CF_SERIES, $source->getSeries() );
 				update_post_meta( $chart->ID, Visualizer_Plugin::CF_SOURCE, $source->getSourceName() );
 				update_post_meta( $chart->ID, Visualizer_Plugin::CF_DEFAULT_DATA, 0 );
@@ -1146,6 +1147,15 @@ public function uploadData() {
 				Visualizer_Module_Utility::set_defaults( $chart, null );
 
 				$settings = get_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, true );
+				if ( isset( $settings['series'] ) && ! ( count( $settings['series'] ) - count( $source->getSeries() ) > 1 ) ) {
+					$diff_total_series = abs( count( $settings['series'] ) - count( $source->getSeries() ) );
+					if ( $diff_total_series ) {
+						foreach ( range( 1, $diff_total_series ) as $k => $diff_series ) {
+							$settings['series'][] = end( $settings['series'] );
+						}
+						update_post_meta( $chart->ID, Visualizer_Plugin::CF_SETTINGS, $settings );
+					}
+				}
 
 				$render->id     = $chart->ID;
 				$render->data   = json_encode( $source->getRawData( get_post_meta( $chart->ID, Visualizer_Plugin::CF_EDITABLE_TABLE, true ) ) );

classes/Visualizer/Source/Csv/Remote.php

@@ -97,6 +97,9 @@ private function _repopulate( $chart_id ) {
 	 * @return array The re populated array of data or old one.
 	 */
 	public function repopulateData( $data, $chart_id ) {
+		if ( ! is_array( $data ) ) {
+			$data = array();
+		}
 		return array_key_exists( 'data', $data ) ? $data['data'] : $data;
 	}