cs\App\Router

Complexity

Total Complexity

85

Size/Duplication

Total Lines	414
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	5

Importance

Changes	6
Bugs	2	Features	4

17 Methods

Rating	Name	Duplication	Size	Complexity
A	execute_router()	0	13	3
B	print_cli_structure()	0	35	5
C	print_cli_structure_internal()	0	25	13
B	print_cli_structure_normalize_result()	0	20	9
B	check_and_normalize_route()	0	28	5
B	check_and_normalize_route_internal()	0	20	8
A	files_router()	0	12	3
A	files_router_handler()	0	3	1
B	files_router_handler_internal()	0	16	6
A	files_router_available_methods()	0	6	1
A	handler_not_found()	0	15	4
B	controller_router()	0	21	6
A	controller_router_handler()	0	4	1
B	controller_router_handler_internal()	0	17	6
C	controller_router_available_methods()	0	24	7
A	controller_router_available_methods_to_flat_structure()	0	16	3
A	controller_router_handler_internal_execute()	0	10	4

<?php
/**
 * @package   CleverStyle CMS
 * @author    Nazar Mokrynskyi <nazar@mokrynskyi.com>
 * @copyright Copyright (c) 2015-2016, Nazar Mokrynskyi
 * @license   MIT License, see license.txt
 */
namespace cs\App;
use
	cli,
	cs\Config,
	cs\Config\Module_Properties,
	cs\ExitException,
	cs\Page,
	cs\Request,
	cs\Response;

/**
 * @property string[] $controller_path Path that will be used by controller to render page
 */
trait Router {
	/**
	 * Path that will be used by controller to render page
	 *
	 * @var string[]
	 */
	protected $controller_path;
	/**
	 * Execute router
	 *
	 * Depending on module, files-based or controller-based router might be used
	 *
	 * @throws ExitException
	 */
	protected function execute_router () {
		$Request = Request::instance();
		$this->check_and_normalize_route($Request);
		if ($Request->method == 'CLI') {
			$this->print_cli_structure($Request->path);
			return;
		}
		if (file_exists("$this->working_directory/Controller.php")) {
			$this->controller_router($Request);
		} else {
			$this->files_router($Request);
		}
	}
	protected function print_cli_structure ($path) {
		$Config = Config::instance();
		$result = [];
		foreach ($Config->components['modules'] as $module_name => $data) {
			if ($data['active'] == Module_Properties::ENABLED) {
				$working_dir = MODULES."/$module_name/cli";
				$structure   = file_exists("$working_dir/index.json") ? file_get_json("$working_dir/index.json") : [];
				$this->print_cli_structure_internal(
					$working_dir,
					$module_name,
					'',
					$structure,
					$result[$module_name]
				);
			}
		}
		$result = $this->print_cli_structure_normalize_result($result);
		$Page   = Page::instance();
		// Cut `/cli/` prefix
		$path = substr($path, 5);
		if ($path) {
			$Page->content("%WPaths and methods for \"$path\":%n\n");
			$result = array_filter(
				$result,
				function ($item) use ($path) {
					return strpos($item[0], $path) === 0;
				}
			);
		} else {
			$Page->content("%WAll paths and methods:%n\n");
		}
		$Page->content(
			implode("\n", (new cli\Table(['Path', 'Methods available'], $result))->getDisplayLines())."\n"
		);
	}
	/**
	 * @param string $dir
	 * @param string $module_name
	 * @param string $basename
	 * @param array  $structure
	 * @param array  $result
	 */
	protected function print_cli_structure_internal ($dir, $module_name, $basename, $structure, &$result) {
		/** @noinspection NestedTernaryOperatorInspection */
		foreach ($structure ?: (!$basename ? ['index'] : []) as $path => $nested_structure) {
			if (!is_array($nested_structure)) {
				$path             = $nested_structure;
				$nested_structure = [];
			}
			$key = $path == '_' ? 0 : $path;
			if (file_exists("$dir/Controller.php")) {
				$result[$key] = $this->controller_router_available_methods(
					$dir,
					"\\cs\\modules\\$module_name\\cli\\Controller",
					$basename ? $basename.'_'.$path : $path
				);
				if ($structure && $nested_structure) {
					$this->print_cli_structure_internal($dir, $module_name, $basename ? $basename.'_'.$path : $path, $nested_structure, $result[$key]);
				}
			} else {
				$result[$key] = $this->files_router_available_methods($dir, $path);
				if ($structure && $nested_structure) {
					$this->print_cli_structure_internal("$dir/$path", $module_name, $basename, $nested_structure, $result[$key]);
				}
			}
		}
	}
	/**
	 * @param array  $result
	 * @param string $prefix
	 *
	 * @return string[]
	 */
	protected function print_cli_structure_normalize_result ($result, $prefix = '') {
		$normalized = [];
		foreach ($result as $key => $value) {
			if (is_array_assoc($value)) {
				if (!$prefix && isset($value['index'])) {
					$value[0] = $value['index'];
					unset($value['index']);
				}
				if (is_array(@$value[0]) && $value[0]) {
					$normalized[] = [$prefix.$key, strtolower(implode(', ', $value[0]))];
				}
				unset($value[0]);
				/** @noinspection SlowArrayOperationsInLoopInspection */
				$normalized = array_merge($normalized, $this->print_cli_structure_normalize_result($value, $prefix.$key.'/'));
			} elseif (is_array($value) && $value) {
				$normalized[] = [$prefix.$key, strtolower(implode(', ', $value))];
			}
		}
		return $normalized;
	}
	/**
	 * Normalize `cs\Request::$route_path` and fill `cs\App::$controller_path`
	 *
	 * @param Request $Request
	 *
	 * @throws ExitException
	 */
	protected function check_and_normalize_route ($Request) {
		if (!file_exists("$this->working_directory/index.json")) {
			return;
		}
		$structure = file_get_json("$this->working_directory/index.json");
		if (!$structure) {
			return;
		}
		for ($nesting_level = 0; $structure; ++$nesting_level) {
			/**
			 * Next level of routing path
			 */
			$path = @$Request->route_path[$nesting_level];
			/**
			 * If path not specified - take first from structure
			 */
			$this->check_and_normalize_route_internal($path, $structure, $Request->cli_path || $Request->api_path);
			$Request->route_path[$nesting_level] = $path;
			/**
			 * Fill paths array intended for controller's usage
			 */
			$this->controller_path[] = $path;
			/**
			 * If nested structure is not available - we'll not go into next iteration of this cycle
			 */
			$structure = @$structure[$path];
		}
	}
	/**
	 * @param string $path
	 * @param array  $structure
	 * @param bool   $cli_or_api_path
	 *
	 * @throws ExitException
	 */
	protected function check_and_normalize_route_internal (&$path, $structure, $cli_or_api_path) {
		/**
		 * If path not specified - take first from structure
		 */
		if (!$path) {
			$path = isset($structure[0]) ? $structure[0] : array_keys($structure)[0];
			/**
			 * We need exact paths for CLI and API request (or `_` ending if available) and less strict mode for other cases that allows go deeper automatically
			 */
			if ($path !== '_' && $cli_or_api_path) {
				throw new ExitException(404);
			}
		} elseif (!isset($structure[$path]) && !in_array($path, $structure)) {
			throw new ExitException(404);
		}
		/** @noinspection PhpUndefinedMethodInspection */
		if (!$this->check_permission($path)) {
			throw new ExitException(403);
		}
	}
	/**
	 * Include files necessary for module page rendering
	 *
	 * @param Request $Request
	 *
	 * @throws ExitException
	 */
	protected function files_router ($Request) {
		foreach ($this->controller_path as $index => $path) {
			/**
			 * Starting from index 2 we need to maintain slash-separated string that includes all paths from index 1 and till current
			 */
			if ($index > 1) {
				$path = implode('/', array_slice($this->controller_path, 1, $index));
			}
			$next_exists = isset($this->controller_path[$index + 1]);
			$this->files_router_handler($Request, $this->working_directory, $path, !$next_exists);
		}
	}
	/**
	 * Include files that corresponds for specific paths in URL
	 *
	 * @param Request $Request
	 * @param string  $dir
	 * @param string  $basename
	 * @param bool    $required
	 *
	 * @throws ExitException
	 */
	protected function files_router_handler ($Request, $dir, $basename, $required = true) {
		$this->files_router_handler_internal($Request, $dir, $basename, $required);
	}
	/**
	 * @param Request $Request
	 * @param string  $dir
	 * @param string  $basename
	 * @param bool    $required
	 *
	 * @throws ExitException
	 */
	protected function files_router_handler_internal ($Request, $dir, $basename, $required) {
		$included = _include("$dir/$basename.php", false, false) !== false;
		if (!$Request->cli_path && !$Request->api_path) {
			return;
		}
		$request_method = strtolower($Request->method);
		$included       = _include("$dir/$basename.$request_method.php", false, false) !== false || $included;
		if ($included || !$required) {
			return;
		}
		$this->handler_not_found(
			$this->files_router_available_methods($dir, $basename),
			$request_method,
			$Request
		);
	}
	/**
	 * @param string $dir
	 * @param string $basename
	 *
	 * @return string[]
	 */
	protected function files_router_available_methods ($dir, $basename) {
		$methods = get_files_list($dir, "/^$basename\\.[a-z]+\\.php$/");
		$methods = _strtoupper(_substr($methods, strlen($basename) + 1, -4));
		natcasesort($methods);
		return array_values($methods);
	}
	/**
	 * If HTTP method handler not found we generate either `501 Not Implemented` if other methods are supported or `404 Not Found` if handlers for others
	 * methods also doesn't exist
	 *
	 * @param string[] $available_methods
	 * @param string   $request_method
	 * @param Request  $Request
	 *
	 * @throws ExitException
	 */
	protected function handler_not_found ($available_methods, $request_method, $Request) {
		if ($available_methods) {
			if ($Request->cli_path) {
				$this->print_cli_structure($Request->path);
				throw new ExitException(501);
			} else {
				Response::instance()->header('Allow', implode(', ', $available_methods));
				if ($request_method !== 'options') {
					throw new ExitException(501);
				}
			}
		} else {
			throw new ExitException(404);
		}
	}
	/**
	 * Call methods necessary for module page rendering
	 *
	 * @param Request $Request
	 *
	 * @throws ExitException
	 */
	protected function controller_router ($Request) {
		$suffix = '';
		if ($Request->cli_path) {
			$suffix = '\\cli';
		} elseif ($Request->admin_path) {
			$suffix = '\\admin';
		} elseif ($Request->api_path) {
			$suffix = '\\api';
		}
		$controller_class = "cs\\modules\\$Request->current_module$suffix\\Controller";
		foreach ($this->controller_path as $index => $path) {
			/**
			 * Starting from index 2 we need to maintain underscore-separated string that includes all paths from index 1 and till current
			 */
			if ($index > 1) {
				$path = implode('_', array_slice($this->controller_path, 1, $index));
			}
			$next_exists = isset($this->controller_path[$index + 1]);
			$this->controller_router_handler($Request, $controller_class, $path, !$next_exists);
		}
	}
	/**
	 * Call methods that corresponds for specific paths in URL
	 *
	 * @param Request $Request
	 * @param string  $controller_class
	 * @param string  $method_name
	 * @param bool    $required
	 *
	 * @throws ExitException
	 */
	protected function controller_router_handler ($Request, $controller_class, $method_name, $required = true) {
		$method_name = str_replace('.', '_', $method_name);
		$this->controller_router_handler_internal($Request, $controller_class, $method_name, $required);
	}
	/**
	 * @param Request $Request
	 * @param string  $controller_class
	 * @param string  $method_name
	 * @param bool    $required
	 *
	 * @throws ExitException
	 */
	protected function controller_router_handler_internal ($Request, $controller_class, $method_name, $required) {
		$Response = Response::instance();
		$found    = $this->controller_router_handler_internal_execute($controller_class, $method_name, $Request, $Response);
		if (!$Request->cli_path && !$Request->api_path) {
			return;
		}
		$request_method = strtolower($Request->method);
		$found          = $this->controller_router_handler_internal_execute($controller_class, $method_name.'_'.$request_method, $Request, $Response) || $found;
		if ($found || !$required) {
			return;
		}
		$this->handler_not_found(
			$this->controller_router_available_methods($this->working_directory, $controller_class, $method_name),
			$request_method,
			$Request
		);
	}
	/**
	 * @param string $working_directory
	 * @param string $controller_class
	 * @param string $method_name
	 *
	 * @return string[]
	 */
	protected function controller_router_available_methods ($working_directory, $controller_class, $method_name) {
		$structure = file_exists("$working_directory/index.json") ? file_get_json("$working_directory/index.json") : ['index'];
		$structure = $this->controller_router_available_methods_to_flat_structure($structure);
		$methods   = array_filter(
			get_class_methods($controller_class),
			function ($found_method) use ($method_name, $structure) {
				if (!preg_match("/^{$method_name}_[a-z_]+$/", $found_method)) {
					return false;
				}
				foreach ($structure as $structure_method) {
					if (strpos($found_method, $structure_method) === 0 && strpos($method_name, $structure_method) !== 0) {
						return false;
					}
				}
				return true;
			}
		);
		if (method_exists($controller_class, $method_name)) {
			$methods[] = $method_name;
		}
		$methods = _strtoupper(_substr($methods, strlen($method_name) + 1));
		natcasesort($methods);
		return array_values($methods);
	}
	/**
	 * @param array  $structure
	 * @param string $prefix
	 *
	 * @return string[]
	 */
	protected function controller_router_available_methods_to_flat_structure ($structure, $prefix = '') {
		$flat_structure = [];
		foreach ($structure as $path => $nested_structure) {
			if (is_array($nested_structure)) {
				$flat_structure[] = $prefix.$path;
				/** @noinspection SlowArrayOperationsInLoopInspection */
				$flat_structure = array_merge(
					$flat_structure,
					$this->controller_router_available_methods_to_flat_structure($nested_structure, $prefix.$path.'_')
				);
			} else {
				$flat_structure[] = $prefix.$nested_structure;
			}
		}
		return $flat_structure;
	}
	/**
	 * @param string   $controller_class
	 * @param string   $method_name
	 * @param Request  $Request
	 * @param Response $Response
	 *
	 * @return bool
	 */
	protected function controller_router_handler_internal_execute ($controller_class, $method_name, $Request, $Response) {
		if (!method_exists($controller_class, $method_name)) {
			return false;
		}
		$result = $controller_class::$method_name($Request, $Response);
		if ($result !== null) {
			Page::instance()->{$Request->api_path ? 'json' : 'content'}($result);
		}
		return true;
	}
}