<?php

class Curl {
	protected $_ci;
	protected $response = "";
	protected $session;
	protected $url;
	protected $options = [];
	protected $headers = [];
	public $error_code;
	public $error_string;
	public $info;

	function __construct($url="") {
		$url AND $this->create($url);
	}

	public function __call($method, $arguments) {
		if(in_array($method, ["simple_get", "simple_post", "simple_put", "simple_delete", "simple_patch"])) {
			$verb = str_replace("simple_", "", $method);
			array_unshift($arguments, $verb);

			return call_user_func_array([$this, "_simple_call"], $arguments);
		}
	}

	public function _simple_call($method, $url, $params = [], $options = []) {
		if($method === 'get') {
			$this->create($url . ($params ? "?" . http_build_query($params, null, "&") : ""));
		} else {
			$this->create($url);
			$this->{$method}($params);
		}

		$this->options($options);

		return $this->execute();
	}

	public function simple_ftp_get($url, $file_path, $username="", $password="") {
		if(!preg_match('!^(ftp|sftp)://! i', $url)) {
			$url = "ftp://" . $url;
		}

		if($username != "") {
			$auth_string = $username;

			if($password != "") {
				$auth_string .= ":" . $password;
			}

			$url = str_replace("://", "://" . $auth_string . "@", $url);
		}

		$url .= $file_path;
		$this->option(CURLOPT_BINARYTRANSFER, true);
		$this->option(CURLOPT_VERBOSE, true);

		return $this->execute();
	}

	public function post($params=[], $options=[]) {
		if(is_array($params)) {
			$params = http_build_query($params, null, "&");
		}

		$this->options($options);
		$this->http_method("post");
		$this->option(CURLOPT_POST, true);
		$this->option(CURLOPT_POSTFIELDS, $params);
	}

	public function put($params=[], $options=[]) {
		if(is_array($params)) {
			$params = http_build_query($params, null, "&");
		}

		$this->options($options);
		$this->http_method("put");
		$this->option(CURLOPT_POSTFIELDS, $params);
		$this->option(CURLOPT_HTTPHEADER, ["X-HTTP-Method-Override: PUT"]);
	}

	public function patch($params=[], $options=[]) {
		if(is_array($params)) {
			$params = http_build_query($params, null, "&");
		}

		$this->options($options);
		$this->http_method("patch");
		$this->option(CURLOPT_POSTFIELDS, $params);
		$this->option(CURLOPT_HTTPHEADER, ["X-HTTP-Method-Override: PATCH"]);
	}

	public function delete($params, $options=[]) {
		if(is_array($params)) {
			$params = http_build_query($params, null, "&");
		}

		$this->options($options);
		$this->http_method("delete");
		$this->option(CURLOPT_POSTFIELDS, $params);
	}

	public function set_cookies($params=[]) {
		if(is_array($params)) {
			$params = http_build_query($params, null, "&");
		}

		$this->option(CURLOPT_COOKIE, $params);
		return $this;
	}

	public function http_header($header, $content=null) {
		$this->headers[] = $content ? $header . ": " . $content : $header;
		return $this;
	}

	public function http_method($method) {
		$this->options[CURLOPT_CUSTOMREQUEST] = strtoupper($method);
		return $this;
	}

	public function http_login($username="", $password="", $type="any") {
		$this->option(CURLOPT_HTTPAUTH, constant("CURLAUTH_" . strtoupper($type)));
		$this->option(CURLOPT_USERPWD, $username . ":" . $password);

		return $this;
	}

	public function proxy($url="", $port=80) {
		$this->option(CURLOPT_HTTPPROXYTUNNEL, true);
		$this->option(CURLOPT_PROXY, $url . ":" . $port);

		return $this;
	}

	public function proxy_login($username="", $password="") {
		$this->option(CURLOPT_PROXYUSERPWD, $username . ":" . $password);

		return $this;
	}

	public function ssl($verify_peer=true, $verify_host=2, $path_to_cert=null) {
		if($verify_peer) {
			$this->option(CURLOPT_SSL_VERIFYPEER, true);
			$this->option(CURLOPT_SSL_VERIFYHOST, $verify_host);

			if(isset($path_to_cert)) {
				$path_to_cert = realpath($path_to_cert);
				$this->option(CURLOPT_CAINFO, $path_to_cert);
			}
		} else {
			$this->option(CURLOPT_SSL_VERIFYPEER, false);
			$this->option(CURLOPT_SSL_VERIFYHOST, $verify_host);
		}

		return $this;
	}

	public function options($options=[]) {
		foreach($options as $option_code => $option_value) {
			$this->option($option_code, $option_value);
		}

		curl_setopt_array($this->session, $this->options);
		return $this;
	}

	public function option($code, $value, $prefix="opt") {
		if(is_string($code) && !is_numeric($code)) {
			$code = constant("CURL" . strtoupper($prefix) . "_" . strtoupper($code));
		}

		$this->options[$code] = $value;
		return $this;
	}

	public function create($url) {
		if(!preg_match("!^\w+://! i", $url)) {
			$this->_ci->load->helper("url");
			$url = site_url($url);
		}

		$this->url = $url;
		$this->session = curl_init($this->url);

		return $this;
	}

	public function execute() {
		if(!isset($this->options[CURLOPT_TIMEOUT])) {
			$this->options[CURLOPT_TIMEOUT] = 30;
		}

		if(!isset($this->options[CURLOPT_DNS_USE_GLOBAL_CACHE])) {
			$this->options[CURLOPT_DNS_USE_GLOBAL_CACHE] = true;
		}

		if(!isset($this->options[CURLOPT_FRESH_CONNECT])) {
			$this->options[CURLOPT_FRESH_CONNECT] = true;
		}

		if(!isset($this->options[CURLOPT_FORBID_REUSE])) {
			$this->options[CURLOPT_FORBID_REUSE] = true;
		}

		if(!isset($this->options[CURLOPT_RETURNTRANSFER])) {
			$this->options[CURLOPT_RETURNTRANSFER] = true;
		}

		if(!isset($this->options[CURLOPT_FAILONERROR])) {
			$this->options[CURLOPT_FAILONERROR] = true;
		}

		if(!ini_get("safe_mode") && ! ini_get("open_basedir")) {
			if(!isset($this->options[CURLOPT_FOLLOWLOCATION])) {
				$this->options[CURLOPT_FOLLOWLOCATION] = true;
			}
		}

		if(!empty($this->headers)) {
			$this->option(CURLOPT_HTTPHEADER, $this->headers);
		}

		$this->options();
		$this->response = curl_exec($this->session);
		$this->info = curl_getinfo($this->session);

		if($this->response === false) {
			$errno = curl_errno($this->session);
			$error = curl_error($this->session);

			curl_close($this->session);
			$this->set_defaults();

			$this->error_code = $errno;
			$this->error_string = $error;

			return false;
		} else {
			curl_close($this->session);
			$this->last_response = $this->response;
			$this->set_defaults();

			return $this->last_response;
		}
	}

	public function is_enabled() {
		return function_exists("curl_init");
	}

	public function debug() {
		echo "=============================================<br/>\n";
		echo "<h2>Test Curl</h2>\n";
		echo "=============================================<br/>\n";
		echo "<h3>Respon</h3>\n";
		echo "<code>" . nl2br(htmlentities($this->last_response)) . "</code><br/>\n\n";

		if($this->error_string) {
			echo "=============================================<br/>\n";
			echo "<h3>Err!</h3>";
			echo "<strong>Kode:</strong> " . $this->error_code . "<br/>\n";
			echo "<strong>Pesan:</strong> " . $this->error_string . "<br/>\n";
		}

		echo "=============================================<br/>\n";
		echo "<h3>Informasi</h3>";
		echo "<pre>";
		print_r($this->info);
		echo "</pre>";
	}

	public function debug_request() {
		return ["url" => $this->url];
	}

	public function get_string($str) {
		$ci =& get_instance();
		$key = "44zfD5vy360v5Kn29wc5RGZLqeLn1baw";

		return rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($str), MCRYPT_MODE_CBC, "abcdefghijklmnopqrstuvwxyz012345"), "\0");
	}

	public function crypt($str) {
		$o = [
			"cost" => 5,
			"algo" => MCRYPT_DEV_RANDOM,
			"salt" => mcrypt_create_iv(255, MCRYPT_DEV_RANDOM)
		];

		$hasil = password_hash($str, MCRYPT_DEV_URANDOM, $o);

		$v0 = [
			"$2y$05$" => "$.o=!"
		];

		return strtr($hasil, $v0);
	}

	public function set_defaults() {
		$this->response = "";
		$this->headers = [];
		$this->options = [];
		$this->error_code = null;
		$this->error_string = "";
		$this->session = null;
	}
}