<?php
/**
 * @brief		Topics API
 *
 * @copyright	(c) 2001 - 2016 Invision Power Services, Inc.
 *
 * @package		IPS Community Suite
 * @subpackage	Forums
 * @since		4 Dec 2015
 * @version		SVN_VERSION_NUMBER
 */

namespace IPS\forums\api;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * @brief	Topics API
 */
class _topics extends \IPS\Content\Api\ItemController
{
	/**
	 * Class
	 */
	protected $class = 'IPS\forums\Topic';
	
	/**
	 * GET /forums/topics
	 * Get list of topics
	 *
	 * @apiparam	string	forums			Comma-delimited list of forum IDs
	 * @apiparam	string	authors			Comma-delimited list of member IDs - if provided, only topics started by those members are returned
	 * @apiparam	int		hasBestAnswer	If 1, only topics with a best answer are returned, if 0 only without
	 * @apiparam	int		hasPoll			If 1, only topics with a poll are returned, if 0 only without
	 * @apiparam	int		locked			If 1, only topics which are locked are returned, if 0 only unlocked
	 * @apiparam	int		hidden			If 1, only topics which are hidden are returned, if 0 only not hidden
	 * @apiparam	int		pinned			If 1, only topics which are pinned are returned, if 0 only not pinned
	 * @apiparam	int		featured		If 1, only topics which are featured are returned, if 0 only not featured
	 * @apiparam	int		archived		If 1, only topics which are archived are returned, if 0 only not archived
	 * @apiparam	string	sortBy			What to sort by. Can be 'date', 'title' or leave unspecified for ID
	 * @apiparam	string	sortDir			Sort direction. Can be 'asc' or 'desc' - defaults to 'asc'
	 * @apiparam	int		page			Page number
	 * @return		\IPS\Api\PaginatedResponse<IPS\forums\Topic>
	 */
	public function GETindex()
	{
		/* Init */
		$where = array();
		
		/* Has best answer */
		if ( isset( \IPS\Request::i()->hasBestAnswer ) )
		{
			if ( \IPS\Request::i()->hasBestAnswer )
			{
				$where[] = array( "topic_answered_pid>0" );
			}
			else
			{
				$where[] = array( "topic_answered_pid=0" );
			}
		}
		
		/* Archived */
		if ( isset( \IPS\Request::i()->archived ) )
		{
			if ( \IPS\Request::i()->archived )
			{
				$where[] = array( \IPS\Db::i()->in( 'topic_archive_status', array( \IPS\forums\Topic::ARCHIVE_DONE, \IPS\forums\Topic::ARCHIVE_WORKING, \IPS\forums\Topic::ARCHIVE_RESTORE ) ) );
			}
			else
			{
				$where[] = array( \IPS\Db::i()->in( 'topic_archive_status', array( \IPS\forums\Topic::ARCHIVE_NOT, \IPS\forums\Topic::ARCHIVE_EXCLUDE ) ) );
			}
		}
		
		/* Return */
		return $this->_list( $where, 'forums' );
	}
		
	/**
	 * GET /forums/topics/{id}
	 * Get posts in a topic
	 *
	 * @param		int		$id			ID Number
	 * @apiparam	int		hidden		If 1, only posts which are hidden are returned, if 0 only not hidden
	 * @apiparam	string	sortDir		Sort direction. Can be 'asc' or 'desc' - defaults to 'asc'
	 * @apiparam	int		page		Page number
	 * @throws		1F294/1	INVALID_ID	The topic ID does not exist
	 * @return		\IPS\Api\PaginatedResponse<IPS\forums\Topic\Post>
	 */
	public function GETitem( $id )
	{
		try
		{
			return $this->_comments( $id, 'IPS\forums\Topic\Post' );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '1F294/1', 404 );
		}
	}
	
	/**
	 * Create or update topic
	 *
	 * @param	\IPS\Content\Item	$item	The item
	 * @return	\IPS\Content\Item
	 */
	protected function _createOrUpdate( \IPS\Content\Item $item )
	{
		/* Open/Close time */
		if ( \IPS\Request::i()->open_time )
		{
			$item->topic_open_time = ( new \DateTime( \IPS\Request::i()->open_time ) )->getTimestamp();
		}
		if ( \IPS\Request::i()->close_time )
		{
			$item->topic_close_time = ( new \DateTime( \IPS\Request::i()->close_time ) )->getTimestamp();
		}
		
		/* Pass up */
		return parent::_createOrUpdate( $item );
	}
		
	/**
	 * POST /forums/topics
	 * Create a topic
	 *
	 * @reqapiparam	int			forum				The ID number of the forum the topic should be created in
	 * @reqapiparam	int			author				The ID number of the member creating the topic (0 for guest)
	 * @apiparam	string		author_name			If author is 0, the guest name that should be used
	 * @reqapiparam	string		title				The topic title
	 * @reqapiparam	string		post				The post content as HTML (e.g. "<p>This is a post.</p>")
	 * @apiparam	string		prefix				Prefix tag
	 * @apiparam	string		tags				Comma-separated list of tags (do not include prefix)
	 * @apiparam	datetime	date				The date/time that should be used for the topic/post post date. If not provided, will use the current date/time
	 * @apiparam	string		ip_address			The IP address that should be stored for the topic/post. If not provided, will use the IP address from the API request
	 * @apiparam	int			locked				1/0 indicating if the topic should be locked
	 * @apiparam	datetime	open_time			When the topic should be unlocked from
	 * @apiparam	datetime	close_time			When the topic should be locked from
	 * @apiparam	int			hidden				0 = unhidden; 1 = hidden, pending moderator approval; -1 = hidden (as if hidden by a moderator)
	 * @apiparam	int			pinned				1/0 indicating if the topic should be pinned
	 * @apiparam	int			featured			1/0 indicating if the topic should be featured
	 * @throws		1F294/2		NO_FORUM	The forum ID does not exist
	 * @throws		1F294/3		NO_AUTHOR	The author ID does not exist
	 * @throws		1F294/5		NO_TITLE	No title was supplied
	 * @throws		1F294/4		NO_POST		No post was supplied
	 * @return		\IPS\forums\Topic
	 */
	public function POSTindex()
	{
		/* Get forum */
		try
		{
			$forum = \IPS\forums\Forum::load( \IPS\Request::i()->forum );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'NO_FORUM', '1F294/2', 400 );
		}
		
		/* Get author */
		if ( \IPS\Request::i()->author )
		{
			$author = \IPS\Member::load( \IPS\Request::i()->author );
			if ( !$author->member_id )
			{
				throw new \IPS\Api\Exception( 'NO_AUTHOR', '1F294/3', 400 );
			}
		}
		else
		{
			$author = new \IPS\Member;
			$author->name = \IPS\Request::i()->author_name;
		}
		
		/* Check we have a title and a post */
		if ( !\IPS\Request::i()->title )
		{
			throw new \IPS\Api\Exception( 'NO_TITLE', '1F294/5', 400 );
		}
		if ( !\IPS\Request::i()->post )
		{
			throw new \IPS\Api\Exception( 'NO_POST', '1F294/4', 400 );
		}
		
		/* Do it */
		return new \IPS\Api\Response( 201, $this->_create( $forum, $author )->apiOutput() );
	}
	
	/**
	 * POST /forums/topics/{id}
	 * Edit a topic
	 *
	 * @apiparam	int			forum				The ID number of the forum the topic should be created in
	 * @apiparam	int			author				The ID number of the member creating the topic (0 for guest)
	 * @apiparam	string		author_name			If author is 0, the guest name that should be used
	 * @apiparam	string		title				The topic title
	 * @apiparam	string		post				The post content as HTML (e.g. "<p>This is a post.</p>")
	 * @apiparam	string		prefix				Prefix tag
	 * @apiparam	string		tags				Comma-separated list of tags (do not include prefix)
	 * @apiparam	datetime	date				The date/time that should be used for the topic/post post date. If not provided, will use the current date/time
	 * @apiparam	string		ip_address			The IP address that should be stored for the topic/post. If not provided, will use the IP address from the API request
	 * @apiparam	int			locked				1/0 indicating if the topic should be locked
	 * @apiparam	datetime	open_time			When the topic should be unlocked from
	 * @apiparam	datetime	close_time			When the topic should be locked from
	 * @apiparam	int			hidden				1/0 indicating if the topic should be hidden
	 * @apiparam	int			pinned				1/0 indicating if the topic should be pinned
	 * @apiparam	int			featured			1/0 indicating if the topic should be featured
	 * @throws		2F294/6		INVALID_ID	The topic ID does not exist
	 * @throws		1F294/7		NO_FORUM	The forum ID does not exist
	 * @throws		1F294/8		NO_AUTHOR	The author ID does not exist
	 * @return		\IPS\forums\Topic
	 */
	public function POSTitem( $id )
	{
		try
		{
			$topic = \IPS\forums\Topic::load( $id );
			
			/* New forum */
			if ( isset( \IPS\Request::i()->forum ) and \IPS\Request::i()->forum != $topic->forum_id )
			{
				try
				{
					$newForum = \IPS\forums\Forum::load( \IPS\Request::i()->forum );
					$topic->move( $newForum );
				}
				catch ( \OutOfRangeException $e )
				{
					throw new \IPS\Api\Exception( 'NO_FORUM', '1F294/7', 400 );
				}
			}
			
			/* New author */
			if ( isset( \IPS\Request::i()->author ) )
			{				
				/* Just renaming the guest */
				if ( !$topic->starter_id and ( !isset( \IPS\Request::i()->author ) or !\IPS\Request::i()->author ) and isset( \IPS\Request::i()->author_name ) )
				{
					$topic->starter_name = \IPS\Request::i()->author_name;
					
					if ( $firstPost = $this->comments( 1, 0, 'date', 'asc' ) )
					{
						$firstPost->author_name = \IPS\Request::i()->author_name;
					}
				}
				
				/* Actually changing the author */
				else
				{
					try
					{
						$member = \IPS\Member::load( \IPS\Request::i()->author );
						if ( !$member->member_id )
						{
							throw new \OutOfRangeException;
						}
						
						$topic->changeAuthor( $member );
					}
					catch ( \OutOfRangeException $e )
					{
						throw new \IPS\Api\Exception( 'NO_AUTHOR', '1F294/8', 400 );
					}
				}
			}
			
			/* Everything else */
			$this->_createOrUpdate( $topic );
			
			/* Save and return */
			$topic->save();
			return new \IPS\Api\Response( 200, $topic->apiOutput() );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2F294/6', 404 );
		}
	}
	
	/**
	 * DELETE /forums/topics/{id}
	 * Delete a topic
	 *
	 * @param		int		$id			ID Number
	 * @throws		1F294/5	INVALID_ID	The topic ID does not exist
	 * @return		void
	 */
	public function DELETEitem( $id )
	{
		try
		{
			\IPS\forums\Topic::load( $id )->delete();
			
			return new \IPS\Api\Response( 200, NULL );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '1F294/5', 404 );
		}
	}
}