Extension of the FoxyCart PHP SDK to include auto-debugging

FoxyCustomClient.php

<?php

require './vendor/autoload.php';

use Foxy\FoxyClient\FoxyClient;

class FoxyCustomClient extends FoxyClient {
	private $parent_class_filename = "";
	private $last_function_line = "";
	private $last_function = "";
	private $last_function_uri = "";
	private $last_function_args = "";
	private $last_function_file = "";
	private $last_message = "";

	public function __construct(\GuzzleHttp\Client $guzzle, array $config = array()) {
		// If debugging is turned on and it is not being executed from the command line, echo the CSS for the collapsible
		if (DEBUG == 1 && function_exists('getallheaders')) {
			echo '<style>.debug input[type=checkbox]{display:none}.debug,.debug~*{font-family:monospace;margin:1em 0}label.debug.tree{display:block;padding:10px;border-left:1px solid #000;border-bottom:1px solid #000}pre.array{padding-left:30px}pre.array pre{margin-top:0;margin-bottom:0}pre.paren{margin-left:-30px}.toggle{float:left}.toggle.tree::before{content:"+\00a0"}input:checked+.toggle.tree:before{content:"-\00a0"}label.debug input+.toggle~*{display:none}label.debug input:checked+.toggle~*{display:block}label.debug.array p{text-decoration:underline;display:unset}.error,.error *{color:red!important;border-color:red!important}</style>';
		}
		$this->setParentClassFilename();
		parent::__construct($guzzle, $config);
	}

	public function get($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::get($uri, $post));
	}

	public function post($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::post($uri, $post));
	}

	public function patch($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::patch($uri, $post));
	}

	public function put($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::put($uri, $post));
	}

	public function delete($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::delete($uri, $post));
	}

	public function options($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::options($uri, $post));
	}

	public function head($uri = "", $post = null) {
		return $this->fcDebug(debug_backtrace(), __FUNCTION__, $uri, $post, parent::head($uri, $post));
	}

	private function setLastFunctionFile($backtrace) {
		$this->last_function_file = $backtrace[0]['file'];
	}

	private function setLastFunctionLine($backtrace) {
		$this->last_function_line = $backtrace[0]['line'];
	}

	private function setLastFunction($function) {
		$this->last_function = strtoupper($function);
	}

	private function setLastFunctionUri($uri) {
		$this->last_function_uri = $uri;
	}

	private function setLastFunctionArgs($post) {
		$this->last_function_args = $post;
	}

	private function setLastMessage($result) {
		$message = 'Success';
		$statusCode = $this->getLastStatusCode();

		if (isset($result['message']) || array_key_exists('message', $result)) {
			$message = $result['message'];
		}
		else if ($statusCode < 200 || $statusCode >= 300) {
			$message = 'Unknown error';

			// I'm sure this seems awfully redundant, but it's the fastest and most accurate method according to:
			// https://www.php.net/manual/en/function.array-key-exists.php#107786
			if (isset($result['_embedded']) || array_key_exists('_embedded', $result) &&
				isset($result['_embedded']['fx:errors']) || array_key_exists('fx:errors', $result['_embedded']) &&
				isset($result['_embedded']['fx:errors'][0]) || array_key_exists('0', $result['_embedded']['fx:errors']) &&
				isset($result['_embedded']['fx:errors'][0]['message']) || array_key_exists('message', $result['_embedded']['fx:errors'][0])
				) {
					$message = $result['_embedded']['fx:errors'][0]['message'];
			}
		}

		$this->last_message = $message;
	}

	private function setParentClassFilename() {
		$rc = new \ReflectionClass(get_parent_class($this));
		$this->parent_class_filename = $rc->getFileName();
	}

	public function getLastFunctionFile() {
		return $this->last_function_file;
	}

	public function getLastFunctionLine() {
		return $this->last_function_line;
	}

	public function getLastFunction() {
		return $this->last_function;
	}

	public function getLastFunctionUri() {
		return $this->last_function_uri;
	}

	public function getLastFunctionArgs() {
		return $this->last_function_args;
	}

	public function getLastMessage() {
		return $this->last_message;
	}

	public function getParentClassFilename() {
		return $this->parent_class_filename;
	}

	public function fcDebug($backtrace, $function, $uri, $post, $result) {
		if ($uri == "" || $backtrace[0]['file'] == $this->getParentClassFilename()) {
			return $result;
		}

		$this->setLastFunctionFile($backtrace);
		$this->setLastFunctionLine($backtrace);
		$this->setLastFunction($function);
		$this->setLastFunctionUri($uri);
		$this->setLastFunctionArgs($post);
		$this->setLastMessage($result);

		$statusCode = $this->getLastStatusCode();
		$file		= $this->getLastFunctionFile();
		$line		= $this->getLastFunctionLine();
		$function	= $this->getLastFunction();
		$uri		= $this->getLastFunctionUri();
		$args		= $this->getLastFunctionArgs();
		$message	= $this->getLastMessage();

		$resourcePath = parse_url($uri)['path'];
		$collection = end(explode('/', $resourcePath));

		if (!ctype_digit($collection)) {
		    $result['_links']['first_resource'] = [
			'href'	=> $result['_embedded']['fx:' . $collection]['0']['_links']['self']['href'],
			'title'	=> 'First resource of this collection',
		    ];
		}

		$html = "";
		$error = "";
		$expand = "";

		if ($statusCode < 200 || $statusCode >= 300) {
			$message = 'Error: ' . $message;
			error_log($message . " " . $function . " " . $uri . " " . $file . ':' . $line);
			$error = 'error';
		}

		if (DEBUG) {
			if (EXPAND_MESSAGES) {
				$expand = 'checked';
			}

			$htmlMsg = $message;
			$htmlMsg .= '<br>' . $function . " " . $uri;
			$htmlMsg .= '<br>' . $file . ':' . $line;

			$details = 'Result:<br>' . $this->htmlizeArray($result);

			if ($args !== null) {
				$argsHtml = 'Args:<br>' . $this->htmlizeArray($args);
				$details = $argsHtml . '<br><br>' . $details;
			}

			echo $this->htmlLog($htmlMsg, $details, $expand, $error);
		}
		
		return $result;
	}

	// I'm considering making htmlLog and htmlizeArray a separate class since they can be used agnostic of the Foxy PHP SDK
	public function htmlLog($msg, $details = "", $expand = "", $error = "") {
		$html = "";

		if ($error) {
			$error = 'error';
		}
		if ($details && $expand) {
			$expand = 'checked';
		}
		else {
			$expand = "";
		}

		if ($details) {
			$html .= '<label class="debug tree ' . $error . '">' . $msg;
			$html .= 	'<input type="checkbox" ' . $expand . '>';
			$html .= 	'<div class="toggle"></div><pre>';
			$html .= 	$details;
			$html .= '</pre></label>';
		}
		else {
			$html .= '<label class="debug tree ' . $error . '">' . $msg . '</label>';
		}
		
		return $html;
	}

	// I'm considering making htmlLog and htmlizeArray a separate class since they can be used agnostic of the Foxy PHP SDK
	public function htmlizeArray($array, $expand = "") {
		$html = "";

		if ($expand !== null && EXPAND_ARRAYS) {
			$expand = 'checked';
		}
		else {
			$expand = "";
		}

		if (gettype($array) == 'array') {
			$html .= '<label class="debug array"><p>Array</p>';
			$html .= 	'<input type="checkbox" ' . $expand . '>';
			$html .= 	'<div class="toggle"></div>';
			$html .=	'<pre class="array">';
			$html .=		'<pre class="paren">(</pre>';

			// There's something wrong, here. I made a mess but couldn't make it work right.
			foreach ($array as $key=>$el) {
				$exp = $expand;
				if ($key == '_links') {
					$exp = null;
					if (EXPAND_ARRAYS == 2) {
						$exp = 'checked';
					}
				}

				$html .= 	'<pre>[' . $key . '] => ' . $this->htmlizeArray($el, $exp) . '</pre>';
			}
			$html .= 		'<pre class="paren">)</pre>';
			$html .=	'</pre>';
			$html .= '</label>';
		}
		else {
			$html .= $array;
		}
	
		return $html;
	}
}

?>