Added callbacks list to hook events.

See #17

src/Formatter/Hook_Formatter.php

@@ -0,0 +1,61 @@
+<?php
+declare( strict_types=1 );
+
+namespace Rarst\Laps\Formatter;
+
+/**
+ * Formatter to process callbacks from a hook instance.
+ */
+class Hook_Formatter {
+
+	/**
+	 * @param \WP_Hook|array $hook
+	 *
+	 * @return array
+	 */
+	public function format($hook): array {
+
+		$callbacks = [];
+
+		if ( $hook instanceof \WP_Hook ) {
+			$hook = $hook->callbacks;
+		}
+		ksort( $hook );
+
+		foreach ( $hook as $priority => $functions ) {
+			foreach ( $functions as $function ) {
+				$callback = $function['function'];
+
+				if ( is_string( $callback ) ) {
+
+				} elseif ( is_a( $callback, 'Closure' ) ) {
+					$closure  = new \ReflectionFunction( $callback );
+					$callback = 'closure from ' . $closure->getFileName() . '::' . $closure->getStartLine();
+
+					if ( false !== strpos( $callback, 'Hook_Record_Collector' ) ) {
+						continue;
+					}
+				} elseif ( is_object( $callback ) ) {
+					$class = new \ReflectionClass( $callback );
+					$name  = $class->getName();
+					if ( 0 === strpos( $name, 'class@anonymous' ) ) {
+						$callback = 'anonymous class from ' . $class->getFileName() . '::' . $class->getStartLine();
+					} else {
+						$callback = $name;
+					}
+				} elseif ( is_string( $callback[0] ) ) { // Static method call.
+					$callback = $callback[0] . '::' . $callback[1];
+				} elseif ( is_object( $callback[0] ) ) {
+					$callback = get_class( $callback[0] ) . '->' . $callback[1];
+				}
+
+				$callback .= ( 1 === (int) $function['accepted_args'] ) ? '' : "({$function['accepted_args']})";
+
+				$callbacks[] = $callback;
+			}
+		}
+
+		return $callbacks;
+	}
+}
+