<?php
/**
 * @package     Joomla.Platform
 * @subpackage  MediaWiki
 *
 * @copyright   Copyright (C) 2005 - 2016 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * MediaWiki API Users class for the Joomla Platform.
 *
 * @since  12.3
 */
class JMediawikiUsers extends JMediawikiObject
{
	/**
	 * Method to login and get authentication tokens.
	 *
	 * @param   string  $lgname      User Name.
	 * @param   string  $lgpassword  Password.
	 * @param   string  $lgdomain    Domain (optional).
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function login($lgname, $lgpassword, $lgdomain = null)
	{
		// Build the request path.
		$path = '?action=login&lgname=' . $lgname . '&lgpassword=' . $lgpassword;

		if (isset($lgdomain))
		{
			$path .= '&lgdomain=' . $lgdomain;
		}

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), null);

		// Request path with login token.
		$path = '?action=login&lgname=' . $lgname . '&lgpassword=' . $lgpassword . '&lgtoken=' . $this->validateResponse($response)->login['token'];

		if (isset($lgdomain))
		{
			$path .= '&lgdomain=' . $lgdomain;
		}

		// Set the session cookies returned.
		$headers = (array) $this->options->get('headers');
		$headers['Cookie'] = !empty($headers['Cookie']) ? empty($headers['Cookie']) : '';
		$headers['Cookie'] = $headers['Cookie'] . $response->headers['Set-Cookie'];
		$this->options->set('headers', $headers);

		// Send the request again with the token.
		$response = $this->client->post($this->fetchUrl($path), null);
		$response_body = $this->validateResponse($response);

		$headers = (array) $this->options->get('headers');
		$cookie_prefix = $response_body->login['cookieprefix'];
		$cookie = $cookie_prefix . 'UserID=' . $response_body->login['lguserid'] . '; ' . $cookie_prefix
			. 'UserName=' . $response_body->login['lgusername'];
		$headers['Cookie'] = $headers['Cookie'] . '; ' . $response->headers['Set-Cookie'] . '; ' . $cookie;
		$this->options->set('headers', $headers);

		return $this->validateResponse($response);
	}

	/**
	 * Method to logout and clear session data.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function logout()
	{
		// Build the request path.
		$path = '?action=login';

		// @TODO clear internal data as well

		// Send the request.
		$response = $this->client->get($this->fetchUrl($path));

		return $this->validateResponse($response);
	}

	/**
	 * Method to get user information.
	 *
	 * @param   array  $ususers  A list of users to obtain the same information for.
	 * @param   array  $usprop   What pieces of information to include.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function getUserInfo(array $ususers, array $usprop = null)
	{
		// Build the request path.
		$path = '?action=query&list=users';

		// Append users to the request.
		$path .= '&ususers=' . $this->buildParameter($ususers);

		if (isset($usprop))
		{
			$path .= '&usprop' . $this->buildParameter($usprop);
		}

		// Send the request.
		$response = $this->client->get($this->fetchUrl($path));

		return $this->validateResponse($response);
	}

	/**
	 * Method to get current user information.
	 *
	 * @param   array  $uiprop  What pieces of information to include.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function getCurrentUserInfo(array $uiprop = null)
	{
		// Build the request path.
		$path = '?action=query&meta=userinfo';

		if (isset($uiprop))
		{
			$path .= '&uiprop' . $this->buildParameter($uiprop);
		}

		// Send the request.
		$response = $this->client->get($this->fetchUrl($path));

		return $this->validateResponse($response);
	}

	/**
	 * Method to get user contributions.
	 *
	 * @param   string   $ucuser        The users to retrieve contributions for.
	 * @param   string   $ucuserprefix  Retrieve contibutions for all users whose names begin with this value.
	 * @param   integer  $uclimit       The users to retrieve contributions for.
	 * @param   string   $ucstart       The start timestamp to return from.
	 * @param   string   $ucend         The end timestamp to return to.
	 * @param   boolean  $uccontinue    When more results are available, use this to continue.
	 * @param   string   $ucdir         In which direction to enumerate.
	 * @param   array    $ucnamespace   Only list contributions in these namespaces.
	 * @param   array    $ucprop        Include additional pieces of information.
	 * @param   array    $ucshow        Show only items that meet this criteria.
	 * @param   string   $uctag         Only list revisions tagged with this tag.
	 * @param   string   $uctoponly     Only list changes which are the latest revision
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function getUserContribs($ucuser = null, $ucuserprefix = null, $uclimit = null, $ucstart = null, $ucend = null, $uccontinue = null,
		$ucdir = null, array $ucnamespace = null, array $ucprop = null, array $ucshow = null, $uctag = null, $uctoponly = null)
	{
		// Build the request path.
		$path = '?action=query&list=usercontribs';

		if (isset($ucuser))
		{
			$path .= '&ucuser=' . $ucuser;
		}

		if (isset($ucuserprefix))
		{
			$path .= '&ucuserprefix=' . $ucuserprefix;
		}

		if (isset($uclimit))
		{
			$path .= '&uclimit=' . $uclimit;
		}

		if (isset($ucstart))
		{
			$path .= '&ucstart=' . $ucstart;
		}

		if (isset($ucend))
		{
			$path .= '&ucend=' . $ucend;
		}

		if ($uccontinue)
		{
			$path .= '&uccontinue=';
		}

		if (isset($ucdir))
		{
			$path .= '&ucdir=' . $ucdir;
		}

		if (isset($ucnamespace))
		{
			$path .= '&ucnamespace=' . $this->buildParameter($ucnamespace);
		}

		if (isset($ucprop))
		{
			$path .= '&ucprop=' . $this->buildParameter($ucprop);
		}

		if (isset($ucshow))
		{
			$path .= '&ucshow=' . $this->buildParameter($ucshow);
		}

		if (isset($uctag))
		{
			$path .= '&uctag=' . $uctag;
		}

		if (isset($uctoponly))
		{
			$path .= '&uctoponly=' . $uctoponly;
		}

		// Send the request.
		$response = $this->client->get($this->fetchUrl($path));

		return $this->validateResponse($response);
	}

	/**
	 * Method to block a user.
	 *
	 * @param   string   $user           Username, IP address or IP range you want to block.
	 * @param   string   $expiry         Relative expiry time, Default: never.
	 * @param   string   $reason         Reason for block (optional).
	 * @param   boolean  $anononly       Block anonymous users only.
	 * @param   boolean  $nocreate       Prevent account creation.
	 * @param   boolean  $autoblock      Automatically block the last used IP address, and any subsequent IP addresses they try to login from.
	 * @param   boolean  $noemail        Prevent user from sending email through the wiki.
	 * @param   boolean  $hidename       Hide the username from the block log.
	 * @param   boolean  $allowusertalk  Allow the user to edit their own talk page.
	 * @param   boolean  $reblock        If the user is already blocked, overwrite the existing block.
	 * @param   boolean  $watchuser      Watch the user/IP's user and talk pages.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function blockUser($user, $expiry = null, $reason = null, $anononly = null, $nocreate = null, $autoblock = null, $noemail = null,
		$hidename = null, $allowusertalk = null, $reblock = null, $watchuser = null)
	{
		// Get the token.
		$token = $this->getToken($user, 'block');

		// Build the request path.
		$path = '?action=unblock';

		// Build the request data.
		$data = array(
			'user' => $user,
			'token' => $token,
			'expiry' => $expiry,
			'reason' => $reason,
			'anononly' => $anononly,
			'nocreate' => $nocreate,
			'autoblock' => $autoblock,
			'noemail' => $noemail,
			'hidename' => $hidename,
			'allowusetalk' => $allowusertalk,
			'reblock' => $reblock,
			'watchuser' => $watchuser,
		);

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), $data);

		return $this->validateResponse($response);
	}

	/**
	 * Method to unblock a user.
	 *
	 * @param   string  $user    Username, IP address or IP range you want to unblock.
	 * @param   string  $reason  Reason for unblock (optional).
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function unBlockUserByName($user, $reason = null)
	{
		// Get the token.
		$token = $this->getToken($user, 'unblock');

		// Build the request path.
		$path = '?action=unblock';

		// Build the request data.
		$data = array(
				'user' => $user,
				'token' => $token,
				'reason' => $reason,
		);

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), $data);

		return $this->validateResponse($response);
	}

	/**
	 * Method to unblock a user.
	 *
	 * @param   int     $id      Username, IP address or IP range you want to unblock.
	 * @param   string  $reason  Reason for unblock (optional).
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function unBlockUserById($id, $reason = null)
	{
		// Get the token.
		$token = $this->getToken($id, 'unblock');

		// Build the request path.
		$path = '?action=unblock';

		// Build the request data.
		// TODO: $data doesn't seem to be used!
		$data = array(
			'id' => $id,
			'token' => $token,
			'reason' => $reason,
		);

		// Send the request.
		$response = $this->client->get($this->fetchUrl($path));

		return $this->validateResponse($response);
	}

	/**
	 * Method to assign a user to a group.
	 *
	 * @param   string  $username  User name.
	 * @param   array   $add       Add the user to these groups.
	 * @param   array   $remove    Remove the user from these groups.
	 * @param   string  $reason    Reason for the change.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function assignGroup($username, $add = null, $remove = null, $reason = null)
	{
		// Get the token.
		$token = $this->getToken($username, 'unblock');

		// Build the request path.
		$path = '?action=userrights';

		// Build the request data.
		$data = array(
			'username' => $username,
			'token' => $token,
			'add' => $add,
			'remove' => $remove,
			'reason' => $reason,
		);

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), $data);

		return $this->validateResponse($response);
	}

	/**
	 * Method to email a user.
	 *
	 * @param   string   $target   User to send email to.
	 * @param   string   $subject  Subject header.
	 * @param   string   $text     Mail body.
	 * @param   boolean  $ccme     Send a copy of this mail to me.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function emailUser($target, $subject = null, $text = null, $ccme = null)
	{
		// Get the token.
		$token = $this->getToken($target, 'emailuser');

		// Build the request path.
		$path = '?action=emailuser';

		// Build the request data.
		$data = array(
			'target' => $target,
			'token' => $token,
			'subject' => $subject,
			'text' => $text,
			'ccme' => $ccme,
		);

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), $data);

		return $this->validateResponse($response);
	}

	/**
	 * Method to get access token.
	 *
	 * @param   string  $user     The User to get token.
	 * @param   string  $intoken  The type of token.
	 *
	 * @return  object
	 *
	 * @since   12.3
	 */
	public function getToken($user, $intoken)
	{
		// Build the request path.
		$path = '?action=query&prop=info&intoken=' . $intoken . '&titles=User:' . $user;

		// Send the request.
		$response = $this->client->post($this->fetchUrl($path), null);

		return (string) $this->validateResponse($response)->query->pages->page[$intoken . 'token'];
	}
}
