support actions only when WP >= 4.7

Author: contactashish13

classes/Visualizer/Module/Frontend.php

@@ -169,6 +169,7 @@ public function enqueueScripts() {
 	 * @param array $atts The array of shortcode attributes.
 	 */
 	public function renderChart( $atts ) {
+		global $wp_version;
 		$atts = shortcode_atts(
 			array(
 				'id'     => false, // chart id
@@ -239,7 +240,7 @@ public function renderChart( $atts ) {
 			'visualizer-render', 'visualizer', array(
 				'charts'        => $this->_charts,
 				'map_api_key'   => get_option( 'visualizer-map-api-key' ),
-				'rest_url'      => rest_url( 'visualizer/v' . VISUALIZER_REST_VERSION . '/action/#id#/#type#/' ),
+				'rest_url'      => version_compare( $wp_version, '4.7.0', '>=' ) ? rest_url( 'visualizer/v' . VISUALIZER_REST_VERSION . '/action/#id#/#type#/' ) : '',
 				'i10n'          => array(
 					'copied'        => __( 'Copied!', 'visualizer' ),
 				),

classes/Visualizer/Render/Sidebar.php

@@ -192,20 +192,24 @@ protected function _renderAdvancedSettings() {
 	 * @access protected
 	 */
 	protected function _renderActionSettings() {
+		global $wp_version;
+		$disable_actions	= version_compare( $wp_version, '4.7.0', '<' );
 		self::_renderSectionStart( esc_html__( 'Actions', 'visualizer' ), false );
 			self::_renderCheckboxItem(
 				esc_html__( 'Print', 'visualizer' ),
 				'actions[]',
 				isset( $this->actions ) && in_array( 'print', $this->actions ) ? true : false,
 				'print',
-				esc_html__( 'To enable printing the data.', 'visualizer' )
+				$disable_actions ? '<span class="viz-section-error">' . esc_html__( 'Upgrade to at least WordPress 4.7 to use this.', 'visualizer' ) . '</span>' : esc_html__( 'To enable printing the data.', 'visualizer' ),
+				$disable_actions
 			);
 			self::_renderCheckboxItem(
 				esc_html__( 'CSV', 'visualizer' ),
 				'actions[]',
 				isset( $this->actions ) && in_array( 'csv;application/csv', $this->actions ) ? true : false,
 				'csv;application/csv',
-				esc_html__( 'To enable downloading the data as a CSV.', 'visualizer' )
+				$disable_actions ? '<span class="viz-section-error">' . esc_html__( 'Upgrade to at least WordPress 4.7 to use this.', 'visualizer' ) . '</span>' : esc_html__( 'To enable downloading the data as a CSV.', 'visualizer' ),
+				$disable_actions
 			);
 
 			$disabled   = ! ( class_exists( 'PHPExcel' ) && extension_loaded( 'zip' ) && extension_loaded( 'xml' ) && version_compare( PHP_VERSION, '5.2.0', '>' ) );
@@ -214,15 +218,16 @@ protected function _renderActionSettings() {
 				'actions[]',
 				isset( $this->actions ) && in_array( 'xls;application/vnd.ms-excel', $this->actions ) ? true : false,
 				'xls;application/vnd.ms-excel',
-				$disabled ? '<span class="viz-section-error">' . esc_html__( 'Enable the ZIP and XML extensions to use this setting.', 'visualizer' ) . '</span>' : esc_html__( 'To enable downloading the data as an Excel spreadsheet.', 'visualizer' ),
-				$disabled
+				$disable_actions ? '<span class="viz-section-error">' . esc_html__( 'Upgrade to at least WordPress 4.7 to use this.', 'visualizer' ) . '</span>' : ( $disabled ? '<span class="viz-section-error">' . esc_html__( 'Enable the ZIP and XML extensions to use this setting.', 'visualizer' ) . '</span>' : esc_html__( 'To enable downloading the data as an Excel spreadsheet.', 'visualizer' ) ),
+				$disable_actions || $disabled
 			);
 			self::_renderCheckboxItem(
 				esc_html__( 'Copy', 'visualizer' ),
 				'actions[]',
 				isset( $this->actions ) && in_array( 'copy', $this->actions ) ? true : false,
 				'copy',
-				esc_html__( 'To enable copying the data to the clipboard.', 'visualizer' )
+				$disable_actions ? '<span class="viz-section-error">' . esc_html__( 'Upgrade to at least WordPress 4.7 to use this.', 'visualizer' ) . '</span>' : esc_html__( 'To enable copying the data to the clipboard.', 'visualizer' ),
+				$disable_actions
 			);
 		self::_renderSectionEnd();
 	}