<?php
/**
 * @brief		Posts API
 * @author		<a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
 * @copyright	(c) Invision Power Services, Inc.
 * @license		https://www.invisioncommunity.com/legal/standards/
 * @package		Invision Community
 * @subpackage	Forums
 * @since		7 Dec 2015
 */

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	Posts API
 */
class _posts extends \IPS\Content\Api\CommentController
{
	/**
	 * Class
	 */
	protected $class = 'IPS\forums\Topic\Post';
	
	/**
	 * GET /forums/posts
	 * Get list of posts
	 *
	 * @apiparam	string	forums			Comma-delimited list of forum IDs
	 * @apiparam	string	authors			Comma-delimited list of member IDs - if provided, only posts by those members are returned
	 * @apiparam	int		hasBestAnswer	If 1, only posts from topics with a best answer are returned, if 0 only without
	 * @apiparam	int		hasPoll			If 1, only posts from  topics with a poll are returned, if 0 only without
	 * @apiparam	int		locked			If 1, only posts from  topics which are locked are returned, if 0 only unlocked
	 * @apiparam	int		hidden			If 1, only posts which are hidden are returned, if 0 only not hidden
	 * @apiparam	int		pinned			If 1, only posts from  topics which are pinned are returned, if 0 only not pinned
	 * @apiparam	int		featured		If 1, only posts from  topics which are featured are returned, if 0 only not featured
	 * @apiparam	int		archived		If 1, only posts from  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\Post>
	 */
	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/posts/{id}
	 * View information about a specific post
	 *
	 * @param		int		$id			ID Number
	 * @throws		1F295/4	INVALID_ID	The post ID does not exist
	 * @return		\IPS\forums\Topic\Post
	 */
	public function GETitem( $id )
	{
		try
		{
			return new \IPS\Api\Response( 200, \IPS\forums\Topic\Post::load( $id )->apiOutput() );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '1F295/4', 404 );
		}
	}
	
	/**
	 * POST /forums/posts
	 * Create a post
	 *
	 * @reqapiparam	int			topic				The ID number of the topic the post should be created in
	 * @reqapiparam	int			author				The ID number of the member making the post (0 for guest)
	 * @apiparam	string		author_name			If author is 0, the guest name that should be used
	 * @reqapiparam	string		post				The post content as HTML (e.g. "<p>This is a post.</p>")
	 * @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			hidden				0 = unhidden; 1 = hidden, pending moderator approval; -1 = hidden (as if hidden by a moderator)
	 * @throws		1F295/1		NO_TOPIC	The forum ID does not exist
	 * @throws		1F295/2		NO_AUTHOR	The author ID does not exist
	 * @throws		1F295/3		NO_POST		No post was supplied
	 * @return		\IPS\forums\Topic\Post
	 */
	public function POSTindex()
	{
		/* Get topic */
		try
		{
			$topic = \IPS\forums\Topic::load( \IPS\Request::i()->topic );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'NO_TOPIC', '1F295/1', 403 );
		}
		
		/* 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', '1F295/2', 403 );
			}
		}
		else
		{
			$author = new \IPS\Member;
			$author->name = \IPS\Request::i()->author_name;
		}
		
		/* Check we have a post */
		if ( !\IPS\Request::i()->post )
		{
			throw new \IPS\Api\Exception( 'NO_POST', '1F295/3', 403 );
		}
		
		/* Do it */
		return $this->_create( $topic, $author, 'post' );
	}
	
	/**
	 * POST /forums/posts/{id}
	 * Edit a post
	 *
	 * @param		int			$id				ID Number
	 * @apiparam	int			author			The ID number of the member making the post (0 for guest)
	 * @apiparam	string		author_name		If author is 0, the guest name that should be used
	 * @apiparam	string		post			The post content as HTML (e.g. "<p>This is a post.</p>")
	 * @apiparam	int			hidden				1/0 indicating if the topic should be hidden
	 * @throws		2F295/6		INVALID_ID				The post ID does not exist
	 * @throws		2F295/7		NO_AUTHOR				The author ID does not exist
	 * @throws		2F295/7		NO_AUTHOR				The author ID does not exist
	 * @throws		1F295/8		CANNOT_HIDE_FIRST_POST		You cannot hide or unhide the first post in a topic. Hide/unhide the topic itself instead.
	 * @throws		1F295/9		CANNOT_AUTHOR_FIRST_POST	You cannot change the author for the first post in a topic. Change the author on the topic itself instead.
	 * @return		\IPS\forums\Topic\Post
	 */
	public function POSTitem( $id )
	{
		try
		{
			/* Load */
			$post = \IPS\forums\Topic\Post::load( $id );
			
			/* Check */
			if ( $post->isFirst() )
			{
				if ( isset( \IPS\Request::i()->hidden ) )
				{
					throw new \IPS\Api\Exception( 'CANNOT_HIDE_FIRST_POST', '1F295/8', 403 );
				}
				if ( isset( \IPS\Request::i()->author ) )
				{
					throw new \IPS\Api\Exception( 'CANNOT_AUTHOR_FIRST_POST', '1F295/9', 403 );
				}
			}
			
			/* Do it */
			try
			{
				return $this->_edit( $post, 'post' );
			}
			catch ( \InvalidArgumentException $e )
			{
				throw new \IPS\Api\Exception( 'NO_AUTHOR', '2F295/7', 400 );
			}
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '2F295/6', 404 );
		}
	}
		
	/**
	 * DELETE /forums/posts/{id}
	 * Deletes a post
	 *
	 * @param		int			$id							ID Number
	 * @throws		1F295/5		INVALID_ID					The post ID does not exist
	 * @throws		1F295/B		CANNOT_DELETE_FIRST_POST	You cannot delete the first post in a topic. Delete the topic itself instead.
	 * @return		void
	 */
	public function DELETEitem( $id )
	{
		try
		{
			$post = \IPS\forums\Topic\Post::load( $id );
			
			if ( $post->isFirst() )
			{
				throw new \IPS\Api\Exception( 'CANNOT_DELETE_FIRST_POST', '1F295/B', 403 );
			}
			
			$post->delete();
			
			return new \IPS\Api\Response( 200, NULL );
		}
		catch ( \OutOfRangeException $e )
		{
			throw new \IPS\Api\Exception( 'INVALID_ID', '1F295/5', 404 );
		}
	}
}