<?php

class Request {

	// @usage: Request::isHttps();
	public static function isHttps() {
		// method for previous apache: !empty($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != 'on'
		// [forwarded] => 1
		// [HTTP_X_FORWARDED_PROTO] => https
    // [HTTP_X_FORWARDED_PORT] => 443
		if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && 'https' == $_SERVER['HTTP_X_FORWARDED_PROTO']) {
			return true;
		} else if (!empty($_SERVER['HTTPS']) && 'on' == $_SERVER['HTTPS']) {
			return true;
		}
		return false;
	}

	// @usage: Request::getHostUri();
	public static function getHostUri() {
		// return current host with protocol
		// [SCRIPT_URI] => http://biuro.biall-net.pl:34543/dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_URL] => /dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_NAME] => /dev-pl/se-master/wfs-qgis.php
		// [HTTP_HOST] => biuro.biall-net.pl
		$uri = (Request::isHttps())? 'https://' : 'http://';
		$uri .= "{$_SERVER['HTTP_HOST']}";
		return $uri;
	}

	public static function getHost() { return V::get('HTTP_HOST', '', $_SERVER); }

	// @usage: Request::getScriptUri();
	public static function getScriptUri() {
		// [SCRIPT_URI] => http://biuro.biall-net.pl:34543/dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_URL] => /dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_NAME] => /dev-pl/se-master/wfs-qgis.php
		// [HTTP_HOST] => biuro.biall-net.pl
		$uri = (Request::isHttps())? 'https://' : 'http://';
		$uri .= "{$_SERVER['HTTP_HOST']}{$_SERVER['SCRIPT_URL']}";
		return $uri;
	}

	// @usage: Request::getPathUri() . "indeks.php?..."
	public static function getPathUri() {
		// [SCRIPT_URI] => http://biuro.biall-net.pl:34543/dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_URL] => /dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_NAME] => /dev-pl/se-master/wfs-qgis.php
		// [HTTP_HOST] => biuro.biall-net.pl
		$uri = (Request::isHttps())? 'https://' : 'http://';
		$uri .= $_SERVER['HTTP_HOST'];
		$scriptPath = '';
		$scriptName = $_SERVER['SCRIPT_NAME'];
		if ('/' == substr($scriptName, -1)) {
			$scriptPath = $scriptName;
		} else {
			$scriptPathEx = explode('/', $scriptName);
			array_pop($scriptPathEx);
			$scriptPath = implode('/', $scriptPathEx) . '/';
		}
		$uri .= $scriptPath;
		return $uri;
	}

	// @usage: Request::getUriDirName() . "/index.php?...";
	public static function getUriDirName() {
		// [SCRIPT_URI] => http://biuro.biall-net.pl:34543/dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_URL] => /dev-pl/se-master/wfs-qgis.php/default_db/
		// [SCRIPT_NAME] => /dev-pl/se-master/wfs-qgis.php
		// [HTTP_HOST] => biuro.biall-net.pl
		$uri = (Request::isHttps())? 'https://' : 'http://';
		$uri .= $_SERVER['HTTP_HOST'];
		$uri .= dirname($_SERVER['SCRIPT_NAME']);
		return $uri;
	}

	// @usage: Request::getRewriteTaskPath();
	public static function getRewriteTaskPath() {
		$reqUri = $_SERVER['REQUEST_URI'];
		$reqScript = $_SERVER['SCRIPT_NAME'];
		$taskPath = str_replace($reqScript, '', $reqUri);
		return $taskPath;
	}

	// @usage: Request::getRequestBody();
	public static function getRequestBody() {
		static $requestBody = null;
		if (null === $requestBody) {
			$requestBody = file_get_contents("php://input");
		}
		return $requestBody;
	}

	// @usage: Request::getRequestJson();
	public static function getRequestJson() {
		static $requestJson = null;
		$body = Request::getRequestBody();
		if (!empty($body)) {
			$requestJson = @json_decode($body, $assoc = true);
			if (null == $requestJson && 0 !== json_last_error()) throw new Exception("Error Parsing Json from Request" . json_last_error());
		}
		return $requestJson;
	}

	// @usage: Request::getUserIp();
	public static function getUserIp() {
		static $ip = null;
		if (null !== $ip) return $ip;
		if (isset($_SERVER['HTTP_CLIENT_IP'])) $ip = $_SERVER['HTTP_CLIENT_IP'];
		else if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
		else if (isset($_SERVER['HTTP_X_FORWARDED'])) $ip = $_SERVER['HTTP_X_FORWARDED'];
		else if (isset($_SERVER['HTTP_FORWARDED_FOR'])) $ip = $_SERVER['HTTP_FORWARDED_FOR'];
		else if (isset($_SERVER['HTTP_FORWARDED'])) $ip = $_SERVER['HTTP_FORWARDED'];
		else if (isset($_SERVER['REMOTE_ADDR'])) $ip = $_SERVER['REMOTE_ADDR'];
		else $ip = 'UNKNOWN';
		return $ip;
	}

}