Tiny, incomplete, hacky Telegram bot API class

Telegram.class.php

<?php
class Telegram {
	const API_ROOT = "https://api.telegram.org/bot%KEY%/%METHOD%";
	private $botkey;

	private $methods = [
		"getUpdates" => [
			"meta" => [
				"type" => "POST"
			],
			"fields" => [
				"update_id" => true,
				"message" => false,
				"edited_message" => false,
				"inline_query" => false,
				"chosen_inline_result" => false,
				"callback_query" => false
			]
		],
		"sendMessage" => [
			"meta" => [
				"type" => "POST"
			],
			"fields" => [
				"chat_id" => true,
				"text" => true,
				"parse_mode" => false,
				"disable_web_page_preview" => false,
				"disable_notification" => false,
				"reply_to_message_id" => false,
				"reply_markup" => false
			]
		],
		"getMe" => [
			"meta" => [
				"type" => "POST"
			],
			"fields" => []
		]
	];

	public function __construct($botkey) {
		$this->botkey = $botkey;
	}

	public function __call($name, $args = array()) {
		if(!isset($this->methods[$name])) throw new Exception("Call to non-existant function " . $name . ".");

		$request = array();

		$methods = $this->methods[$name]['fields'];
		while(1) {
			list($field, $required) = each($methods);
			if(empty($field)) break;
			if($required === true && empty($args)) throw new Exception("Missing argument $field for $name.");
			if(empty($args)) break;
			$request[$field] = array_shift($args);
		}

		$output = curl_exec($this->buildRequest($name, $request));
		$output = json_decode($output);

		return $output;
	}

	private function buildRequest($method, $args) {
		$url = self::API_ROOT;
		$url = str_replace("%KEY%", $this->botkey, $url);
		$url = str_replace("%METHOD%", $method, $url);

		$ch = curl_init($url);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($args));
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

		return $ch;
	}
}

$test = new Telegram("botkeybotkeybotkeybotkey");
print_r($test->getUpdates());
print_r($test->sendMessage("6219499", "hello"));
print_r($test->getMe());