Purge current page cache on front end

Change hook from 'admin_init' to 'admin_bar_init' so that purge_all() is called when purge button is clicked on both admin dashboard and front end admin bar.
Check if the user is on front end when set the call purge_url() and purge the current page cache on case basis.

admin/class-nginx-helper-admin.php

@@ -655,7 +655,7 @@ public function update_new_blog_options( $blog_id ) {
 	 */
 	public function purge_all() {
 
-		global $nginx_purger;
+		global $nginx_purger, $wp;
 
 		$method = filter_input( INPUT_SERVER, 'REQUEST_METHOD', FILTER_SANITIZE_STRING );
 
@@ -682,13 +682,26 @@ public function purge_all() {
 		}
 
 		check_admin_referer( 'nginx_helper-purge_all' );
+
+		$current_url = esc_url_raw( user_trailingslashit( home_url( $wp->request ) ) );
+
+		if ( ! is_admin() ) {
+			$action       = 'purge_single_page';
+			$redirect_url = $current_url;
+		} else {
+			$redirect_url = add_query_arg( array( 'nginx_helper_action' => 'done' ) );
+		}
+
 		switch ( $action ) {
 			case 'purge':
 				$nginx_purger->purge_all();
 				break;
+			case 'purge_single_page':
+				$nginx_purger->purge_url( $current_url );
+				break;
 		}
 
-		wp_redirect( esc_url_raw( add_query_arg( array( 'nginx_helper_action' => 'done' ) ) ) );
+		wp_redirect( esc_url_raw( $redirect_url ) );
 		exit();
 
 	}

includes/class-nginx-helper.php

@@ -221,7 +221,7 @@ private function define_admin_hooks() {
 		$this->loader->add_action( 'edit_term', $nginx_purger, 'purge_on_term_taxonomy_edited', 20, 3 );
 		$this->loader->add_action( 'delete_term', $nginx_purger, 'purge_on_term_taxonomy_edited', 20, 3 );
 		$this->loader->add_action( 'check_ajax_referer', $nginx_purger, 'purge_on_check_ajax_referer', 20 );
-		$this->loader->add_action( 'admin_init', $nginx_helper_admin, 'purge_all' );
+		$this->loader->add_action( 'admin_bar_init', $nginx_helper_admin, 'purge_all' );
 
 		// expose action to allow other plugins to purge the cache.
 		$this->loader->add_action( 'rt_nginx_helper_purge_all', $nginx_purger, 'purge_all' );