<?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: 2022-11-27
 *
 * 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 \chat\data\suspension\SuspensionList;
use \wcf\data\object\type\ObjectTypeCache;
use \wcf\data\user\UserProfile;
use \wcf\system\exception\UserInputException;
use \wcf\system\WCF;

/**
 * Represents a command that revokes suspensions
 */
abstract class AbstractUnsuspensionCommand 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');

		$this->assertUser($parameters['username']);

		$suspensions = $this->getSuspensionData($parameters, $room, $user);
		if (empty($suspensions)) {
			throw new UserInputException('message', WCF::getLanguage()->getDynamicVariable('chat.error.suspension.remove.empty'));
		}
	}

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

		$suspensions = $this->getSuspensionData($parameters, $room, $user);

		WCF::getDB()->beginTransaction();
		(new SuspensionAction($suspensions, 'revoke', [ ]))->executeAction();
		$this->afterCreate($suspensions, $parameters, $room, $user);
		WCF::getDB()->commitTransaction();
	}

	/**
	 * Creates chat messages informing about the removed suspensions.
	 *
	 * @param \chat\data\suspension\Suspension[] $suspension
	 * @param  mixed[]                           $parameters
	 * @param  \chat\data\room\Room              $room
	 * @param  \wcf\data\user\UserProfile        $user
	 */
	protected function afterCreate($suspensions, $parameters, Room $room, UserProfile $user) {
		$objectTypeID = $this->getMessageObjectTypeID('be.bastelstu.chat.messageType.unsuspend');
		$target = $this->getUser($parameters['username']);
		if ($this->isGlobally($parameters)) {
			$roomIDs = array_map(function (Room $room) use ($user) {
				return $room->roomID;
			}, (new \chat\data\user\User($target))->getRooms());
			$roomIDs[] = $room->roomID;
		}
		else {
			$roomIDs = [ $room->roomID ];
		}

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

	/**
	 * Returns the active suspensions.
	 *
	 * @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']);

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

		$suspensionList = new SuspensionList();

		$suspensionList->getConditionBuilder()->add('(expires IS NULL OR expires > ?)', [ TIME_NOW ]);
		$suspensionList->getConditionBuilder()->add('revoked IS NULL');
		$suspensionList->getConditionBuilder()->add('userID = ?', [ $target->userID ]);
		$suspensionList->getConditionBuilder()->add('objectTypeID = ?', [ $objectTypeID ]);
		if ($roomID === null) {
			$suspensionList->getConditionBuilder()->add('roomID IS NULL');
		}
		else {
			$suspensionList->getConditionBuilder()->add('roomID = ?', [ $room->roomID ]);
		}

		$suspensionList->readObjects();

		return array_filter($suspensionList->getObjects(), function (Suspension $suspension) {
			return $suspension->isActive();
		});
	}

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