<?php
/**
 * @file uri.php
 * @date 2018-04-13
 * @author Go Namhyeon <gnh1201@gmail.com>
 * @brief URI module
 */

if(!check_valid_function("base_url")) {
	function base_url() {
		return get_config_value("base_url");
	}
}

if(!check_valid_function("base_api_url")) {
	function base_api_url() {
		return get_config_value("base_api_url");
	}
}

if(!check_valid_function("get_uri")) {
	function get_uri() {
		$requests = get_requests();

		$request_uri = "";
		if(!array_key_empty("REQUEST_URI", $_SERVER)) {
			$request_uri = $requests["_URI"];
		}

		return $request_uri;
	}
}

if(!check_valid_function("read_route")) {
	function read_route($route=false) {
		$route = false;
		
		$config = get_config();
		$requests = get_requests();

		// get requested route
		$route = get_requested_value("route");

		// if empty route
		if(empty($route)) {
			$routes = read_route_all();
			if(count($routes) > 0) {
				$route = $routes[0];
			}

			if(empty($route)) {
				$route = get_value_in_array("default_route", $config, "welcome");
			}
		}

		return $route;
	}
}

if(!check_valid_function("read_route_all")) {
	function read_route_all() {
		$routes = false;

		$d0 = explode("?", $_SERVER['REQUEST_URI']);
		$d1 = explode("/index.php/", $d0[0]);
		if(count($d1) > 1 && $d1[0] == "") {
			$routes = explode("/", $d1[1]);
		} else {
			$d2 = explode("/", $d0[0]);
			if(count($d2) > 0) {
				$routes = array_slice($d2 , 1);
			}
		}

		return $routes;
	}
}

if(!check_valid_function("read_requests")) {
	function read_requests($options=array()) {
		// process http encryption
		$config = get_config();
		$httpencrypt = strtolower(get_value_in_array("httpencrypt", $config, ""));
		if($httpencrypt == "jcryption") {
			if(loadHelper("jcryption.lnk")) {
				jcryption_load();
				eval(jcryption_get_code());
			}
		}

		// process requests
		$requests = array(
			"_ALL"   => $_REQUEST,
			"_POST"  => $_POST,
			"_GET"   => $_GET,
			"_URI"   => get_value_in_array("REQUEST_URI", $_SERVER, false),
			"_FILES" => get_array($_FILES),
			"_RAW"   => file_get_contents('php://input'),
			"_JSON"  => false,
			"_SEAL"  => false
		);

		// check if json request
		foreach(getallheaders() as $name=>$value) {
			if($name == "Content-Type") {
				if($value == "application/json") {
					$options['json'] = true;
				} elseif($value == "application/vnd.php.serialized") {
					$options['serialized'] = true;
				}
				break;
			}
		}

		// check if json request
		if(array_key_equals("json", $options, true)) {
			$requests['_JSON'] = json_decode($requests['_RAW']);
		}

		// check if seal(serialize) request
		if(array_key_equals("serialized", $options, true)) {
			$requests['_SEAL'] = unserialize($requests['_RAW']);
		}

		// with security module
		$protect_methods = array("_ALL", "_GET", "_POST", "_JSON", "_SEAL");
		if(check_valid_function("get_clean_xss")) {
			foreach($protect_methods as $method) {
				foreach($requests[$method] as $k=>$v) {
					$requests[$method][$k] = is_string($v) ? get_clean_xss($v) : $v;
				}
			}
		}

		// set alias
		$aliases = array(
			"all" => "_ALL",
			"post" => "_POST",
			"get" => "_GET",
			"uri" => "_URI",
			"files" => "_FILES",
			"raw" => "_RAW",
			"json" => "_JSON",
			"seal" => "_SEAL"
		);
		foreach($aliases as $k=>$v) {
			$requests[$k] = $requests[$v];
		}

		return $requests;
	}
}

if(!check_valid_function("get_requests")) {
	function get_requests() {
		$requests = get_scope("requests");

		if(!is_array($requests)) {
			set_scope("requests", read_requests());
		}

		return get_scope("requests");
	}
}

if(!check_valid_function("get_final_link")) {
	function get_final_link($url, $data=array(), $entity=true) {
		$link = "";
		$url = urldecode($url);

		$params = array();
		$base_url = "";
		$query_str = "";

		$strings = explode("?", $url);
		$pos = (count($strings) > 1) ? strlen($strings[0]) : -1;

		if($pos < 0) {
			$base_url = $url;
		} else {
			$base_url = substr($url, 0, $pos);
			$query_str = substr($url, ($pos + 1));
			parse_str($query_str, $params);
		}

		foreach($data as $k=>$v) {
			$params[$k] = $v;
		}

		if(count($params) > 0) {
			$link = $base_url . "?" . http_build_query($params);
		} else {
			$link = $base_url;
		}

		if($entity == true) {
			$link = str_replace("&", "&amp;", $link);
		}

		return $link;
	}
}

if(!check_valid_function("get_route_link")) {
	function get_route_link($route, $data=array(), $entity=true, $base_url="") {
		$_data = array(
			"route" => $route
		);
		foreach($data as $k=>$v) {
			$_data[$k] = $v;
		}

		if(empty($base_url)) {
			$base_url = base_url();
		}

		return get_final_link($base_url, $_data, $entity);
	}
}

// URI: Uniform Resource Identifier
// URL: Uniform Resource Locator
if(!check_valid_function("redirect_uri")) {
	function redirect_uri($uri, $permanent=false, $options=array()) {
		if(array_key_equals("check_origin", $options, true)) {
			if(!check_redirect_origin($uri)) {
				set_error("Invalid redirect URL");
				show_errors();
			}
		}

		header("Location: " . $uri, true, $permanent ? 301 : 302);
		exit();
	}
}

if(!check_valid_function("redirect_with_params")) {
	function redirect_with_params($uri, $data=array(), $permanent=false, $entity=false) {
		redirect_uri(get_final_link($uri, $data, $entity), $permanent);
	}
}

if(!check_valid_function("redirect_route")) {
	function redirect_route($route, $data=array()) {
		redirect_uri(get_route_link($route, $data, false));
	}
}

if(!check_valid_function("get_requested_value")) {
	function get_requested_value($name, $method="_ALL", $escape_quotes=true, $escape_tags=false) {
		$value = false;
		$requests = get_requests();

		// set validated value
		if(array_key_exists($method, $requests)) {
			if(is_array($requests[$method])) {
				$value = get_value_in_array($name, $requests[$method], $value);
			} elseif(is_object($requests[$method])) {
				$value = get_property_value($name, $requests[$method]);
			}

			if(is_string($value)) {
				// security: set escape quotes
				if($escape_quotes == true) {
					$value = addslashes($value);
				}

				// security: set escape tags
				if($escape_tags == true) {
					$value = htmlspecialchars($value);
				}
			}
		}

		return $value;
	}
}

if(!check_valid_function("get_requested_values")) {
	function get_requested_values($names, $method="_ALL", $escape_quotes=true, $escape_tags=false) {
		$values = array();

		if(is_array($names)) {
			foreach($names as $name) {
				$values[$name] = get_requested_value($name);
			}
		}

		return $values;
	}
}

if(!check_valid_function("empty_requested_value")) {
	function empty_requested_value($name, $method="_ALL") {
		$value = get_requested_value($name, $method);
		return empty($value);
	}
}

if(!check_valid_function("get_binded_requests")) {
	function get_binded_requests($rules, $method="_ALL") {
		$data = array();

		foreach($rules as $k=>$v) {
			if(!empty($v)) {
				$data[$v] = get_requested_value($k);
			}
		}

		return $data;
	}
}

if(!check_valid_function("get_array")) {
	function get_array($arr) {
		return is_array($arr) ? $arr : array();
	}
}

if(!check_valid_function("check_is_string_not_array")) {
	function check_is_string_not_array($str) {
		return (is_string($str) && !(is_array($str) || $str == "Array"));
	}
}

if(!check_valid_function("set_header_content_type")) {
	function set_header_content_type($type) {
		$type = strtolower($type);
		$rules = array(
			"json" => "application/json",
			"xml" => "text/xml",
			"text" => "text/plain",
			"html" => "text/html",
			"xhtml" => "application/xhtml+xml"
		);

		if(array_key_exists($type, $rules)) {
			header(sprintf("Content-type: %s", $rules[$type]));
		} else {
			header("Content-type: plain/text");
		}
	}
}

if(!check_valid_function("get_requested_json_value")) {
	function get_requested_json_value($name, $escape_quotes=true, $escape_tags=false) {
		return get_requested_value($name, "_JSON", $escape_quotes, $escape_tags);
	}
}

// set scope
set_scope("requests", read_requests());

//EOF