<?php
/*
 * Copyright (c) 2010-2018 Tim Düsterhus.
 *
 * Use of this software is governed by the Business Source License
 * included in the LICENSE file.
 *
 * Change Date: 2022-08-16
 *
 * On the date above, in accordance with the Business Source
 * License, use of this software will be governed by version 3
 * or later of the General Public License.
 */

namespace chat\system\command;

use \chat\data\message\MessageAction;
use \chat\data\room\Room;
use \chat\data\suspension\Suspension;
use \chat\data\suspension\SuspensionAction;
use \wcf\data\object\type\ObjectTypeCache;
use \wcf\data\user\UserProfile;
use \wcf\system\exception\UserInputException;
use \wcf\system\WCF;

/**
 * Represents a command that creates suspensions
 */
abstract class AbstractSuspensionCommand extends AbstractCommand {
	use TNeedsUser;

	/**
	 * Returns the name of the object type for this suspension.
	 *
	 * @return string
	 */
	abstract public function getObjectTypeName();

	/**
	 * Checks the permissions to execute this command.
	 * Throws if necessary.
	 *
	 * @see \chat\system\command\ICommand::validate()
	 */
	abstract protected function checkPermissions($parameters, Room $room, UserProfile $user);

	/**
	 * @inheritDoc
	 */
	public function validate($parameters, Room $room, UserProfile $user = null) {
		if ($user === null) $user = new UserProfile(\wcf\system\WCF::getUser());

		$this->assertParameter($parameters, 'username');
		$this->assertParameter($parameters, 'globally');
		$this->assertParameter($parameters, 'duration');
		$this->assertParameter($parameters, 'reason');

		$this->assertUser($parameters['username']);
		if ($parameters['duration'] !== null && $parameters['duration'] < TIME_NOW) {
			throw new UserInputException('message', WCF::getLanguage()->getDynamicVariable('chat.error.datePast'));
		}
		if (!empty($parameters['reason']) && mb_strlen($parameters['reason']) > 100) {
			throw new UserInputException('message', WCF::getLanguage()->getDynamicVariable('wcf.message.error.tooLong', [ 'maxTextLength' => 250 ]));
		}
		$this->checkPermissions($parameters, $room, $user);

		$test = new Suspension(null, $this->getSuspensionData($parameters, $room, $user));
		if (!$test->isActive()) {
			throw new UserInputException('message', WCF::getLanguage()->getDynamicVariable('chat.error.suspension.noEffect'));
		}
	}

	/**
	 * @inheritDoc
	 */
	public function execute($parameters, Room $room, UserProfile $user = null) {
		if ($user === null) $user = new UserProfile(\wcf\system\WCF::getUser());

		$data = $this->getSuspensionData($parameters, $room, $user);
		$test = new Suspension(null, $data);
		if (!$test->isActive()) {
			return;
		}

		WCF::getDB()->beginTransaction();
		$suspension = (new SuspensionAction([ ], 'create', [ 'data' => $data ]))->executeAction()['returnValues'];

		$this->afterCreate($suspension, $parameters, $room, $user);
		WCF::getDB()->commitTransaction();
	}

	/**
	 * Creates chat messages informing about the suspension.
	 *
	 * @param \chat\data\suspension\Suspension $suspension
	 * @param  mixed[]                         $parameters
	 * @param  \chat\data\room\Room            $room
	 * @param  \wcf\data\user\UserProfile      $user
	 */
	protected function afterCreate(Suspension $suspension, $parameters, Room $room, UserProfile $user) {
		$objectTypeID = $this->getMessageObjectTypeID('be.bastelstu.chat.messageType.suspend');
		$target = $suspension->getUser();

		if ($suspension->getRoom() === null) {
			$roomIDs = array_map(function (Room $room) use ($user) {
				return $room->roomID;
			}, (new \chat\data\user\User($target))->getRooms());
			$roomIDs[] = $room->roomID;
		}
		else {
			$roomIDs = [ $suspension->getRoom()->roomID ];
		}

		(new MessageAction([ ], 'create', [ 'data' => [ 'roomID'       => $room->roomID
		                                              , 'userID'       => $user->userID
		                                              , 'username'     => $user->username
		                                              , 'time'         => TIME_NOW
		                                              , 'objectTypeID' => $objectTypeID
		                                              , 'payload'      => serialize([ 'suspension' => $suspension
		                                                                            , 'roomIDs'    => $roomIDs
		                                                                            , 'globally'   => $this->isGlobally($parameters)
		                                                                            , 'target'     => [ 'userID'   => $target->userID
		                                                                                              , 'username' => $target->username
		                                                                                              ]
		                                                                            ])
		                                              ]
		                                  , 'updateTimestamp' => true
		                                  ]
		                  )
		)->executeAction();
	}

	/**
	 * Returns the database fields.
	 *
	 * @param  mixed[]                    $parameters
	 * @param  \chat\data\room\Room       $room
	 * @param  \wcf\data\user\UserProfile $user
	 * @return mixed[]
	 */
	protected function getSuspensionData($parameters, Room $room, UserProfile $user = null) {
		$target = $this->getUser($parameters['username']);
		$globally = $this->isGlobally($parameters);
		$expires = $parameters['duration'];
		$reason = $parameters['reason'] ?: '';

		$roomID  = $globally ? null : $room->roomID;
		$objectTypeID = ObjectTypeCache::getInstance()->getObjectTypeIDByName('be.bastelstu.chat.suspension', $this->getObjectTypeName());

		return [ 'time' => TIME_NOW
		       , 'expires' => $expires
		       , 'roomID' => $roomID
		       , 'userID' => $target->userID
		       , 'objectTypeID' => $objectTypeID
		       , 'reason' => $reason
		       , 'judgeID' => $user->userID
		       , 'judge' => $user->username
		       ];
	}

	/**
	 * Returns whether a global suspension was requested.
	 *
	 * @param  mixed[] $parameters
	 * @return boolean
	 */
	protected function isGlobally($parameters) {
		return $parameters['globally'] === true;
	}
}