parser.php

<?php
class Syntax_Exception extends Exception {
	private $data = array();
	public function setData(int $line_number, string $token_number) {
		$this->data["line_number"] = $line_number;
		$this->data["token_number"] = $token_number;
	}
	public $meta = array(
		"type" => "syntax_error"
	);
	public function getData():array {
		return $this->data;
	}
}
class Router_Parser {
	private $file_name;
	private $file_content;
	private $tokens;

	private $_router_config = array();

	public function __construct($router = "rules.router") {
		$this->file_name = $router;
		if(($content = file_get_contents($router)) === false) {
			throw new Exception("{$router} file does not exist.");
		} else {
			$this->file_content = $content;
		}
	}

	public function process() {
		return $this->_Parser();
	}

	private function _Parser() {
		$tokens = array();

		$local_content = trim($this->file_content);
		$lines = explode(";", $local_content);
		$lines_count = count($lines);
		for($i = 0; $i < $lines_count; $i++) {
			// Get Current Line
			$current_line = trim($lines[$i]);
			$tokens_pre = explode(" ", $current_line);
			$tokens[$i] = $tokens_pre;
		}
		$this->tokens = $tokens;
		// All Done.
		// Now Got To Process The tokens.
		for($j = 0; $j < count($this->tokens); $j++) {
			if($this->tokens[$j][0] == "files") {
				// This is a files rule.
				/*
				 * Currently Only Supporting line-break parameter.
				 */
				if($this->tokens[$j][1] == "line-break") {
					// Okay So It Is a line break config
					$break = $this->tokens[$j][2];
					$this->_router_config["file_line_break"] = $break;
					if(isset($this->tokens[$j][3])) {
						$syntax_exp = new Syntax_Exception("Syntax Error. Expected ';' but got {$this->tokens[$j][3]}");
						$syntax_exp->setData($j, $this->tokens[$j][3]);
						return $syntax_exp;
					}
				} else {
					// Throw a syntax error at the user
					$syntax_exp = new Syntax_Exception("Syntax Error. Expected 'line-break' but got {$this->tokens[$j][1]}");
					$syntax_exp->setData($j, $this->tokens[$j][1]);
					return $syntax_exp;
				}
			} elseif($this->tokens[$j][0] == "http-header") {
				// HTTP-HEADER MANIPULATION
				if($this->tokens[$j][1] == "set") {
					$key = $this->tokens[$j][2];
					$val = $this->tokens[$j][3];
					$this->_router_config["http-header"][$key] = $val;
				} else {
					$syntax_exp = new Syntax_Exception("Syntax Error. Expected 'set' but got {$this->tokens[$j][1]}");
					$syntax_exp->setData($j, $this->tokens[$j][1]);
					return $syntax_exp;
				}
			} elseif($this->tokens[$j][0] == "#") {
				// Routing Instruction
				if($this->tokens[$j][1] != "route") {
					$syntax_exp = new Syntax_Exception("Syntax Error. Expected 'route' but got {$this->tokens[$j][1]}");
					$syntax_exp->setData($j, $this->tokens[$j][1]);
					return $syntax_exp;
				}
				$param = $this->tokens[$j][2];
				if($this->tokens[$j][3] != "to") {
					$syntax_exp = new Syntax_Exception("Syntax Error. Expected 'to' but got {$this->tokens[$j][1]}");
					$syntax_exp->setData($j, $this->tokens[$j][1]);
					return $syntax_exp;
				}
				if($this->tokens[$j][4] == "file") {
					// To route the request to a file
					$point_towards = $this->tokens[$j][5];
					$type = "file";
					$content = "";
				} elseif($this->tokens[$j][5] == "static-string") {
					$point_towards = "SELF";
					$type = "static-string";
					$content = $this->tokens[$j][6];
				} else {
					$syntax_exp = new Syntax_Exception("Syntax Error. Expected 'to' but got {$this->tokens[$j][1]}");
					$syntax_exp->setData($j, $this->tokens[$j][1]);
					return $syntax_exp;
				}
				$this->_router_config["routes"][][$param] = array(
					"point-towards" => $point_towards,
					"type" => $type,
					"content" => $content
				);
			}
		}
		return true;
	}

	public function getConf() {
		$object = new stdClass();
		$object->conf = $this->_router_config;
		$object->farewell = array(
			"router" => "Custom Router Built By RagedWizard",
			"router file" => $this->file_name,
			"gift" => "USEFULLY USE THIS ROUTES :'-| I MADE IT WITH A LOT OF PATIENCE AND DO BE SUCCESSFUL!"
		);
		return $object;
	}
}