SMMP/build/generic/core/View.php

<?php

	namespace generic\core;


	class View{

		/* (1) Attributes
		---------------------------------------------------------*/
		private $core_class;
		private $patch_class = [];
		private $arguments;

		public static $html_error = "<span class='error'>Une erreur est survenue, veuilez contacter le webmaster si cette erreur persiste.</span>";


		/* (2) Instance constructor (add patches)
		*
		* @core_class<String>				The target view class
		*
		---------------------------------------------------------*/
		private function __construct(String $core_class){

			/* (1) Get class directory & namespace */
			$root_ns  = str_replace('/', '\\', dirname( str_replace('\\', '/', $core_class) ) ).'\\';
			$root_dir = __BUILD__.'/generic/'.dirname( str_replace('\\', '/', $core_class) );

			/* (2) Get patches */
			foreach( glob($root_dir.'/*.php') as $class ){

				// {1} Extract basename (without '.php') //
				$basename = basename($class);
				$basename = substr($basename, 0, strlen($basename)-strlen('.php'));
				$class_ns = $root_ns.$basename;

				// {2} Ignore main (core class) //
				if( $basename == 'main' )
					continue;

				// {3} Check if class exists //
				if( !class_exists($class_ns) )
					continue;

				// {4} Check if instance of 'i_patch' //
				if( !(new $class_ns() instanceof i_patch) )
					continue;

				// {5} Check if it corresponds to a warehouse's module //
				if( !in_array($basename, $_SESSION['WAREHOUSE']['modules']) )
					continue;

				// {6} Store each patch instance //
				$this->patch_class[$basename] = new $class_ns();

			}

			/* (3) Store core class */
			$this->core_class = $core_class;
		}



		/* (3) Renders a view with injected data
		*
		* @injected_data<Array>				Data to inject
		*
		* @return render<String>			Rendered view
		*
		---------------------------------------------------------*/
		public function render(array $injected_data=[]){
			/* (1) Create core instance with data */
			$view = new $this->core_class(...$injected_data);

			/* (2) Patch it every @patch_class */
			foreach($this->patch_class as $patch_name=>$patch_inst)
				$view->patch($patch_name, $patch_inst);

			/* (3) Dispatch rendering */
			return $view->render();

		}


		/* (4) Loads a view from its path (builder)
		*
		* @view_path<String>				View path
		*
		* @return view<View>				View instance
		* 									NULL on error
		*
		---------------------------------------------------------*/
		public static function load(String $view_path){

			/* (1) Check arguments
			---------------------------------------------------------*/
			/* (1) Check path format */
			if( !preg_match('@^[\w+\.]+$@', $view_path) )
				return null;

			/* (2) Extract class */
			$core_class = '\\view\\'.str_replace('.', '\\', $view_path).'\\main';

			/* (3) Check if class exists */
			if( !class_exists($core_class) )
				return null;


			/* (2) Return View instance
			---------------------------------------------------------*/
			return new self($core_class);

		}




	}